WO2013102772A2

WO2013102772A2 - Medium forwarding unit with circulating blade for transporting gaseous mediums

Info

Publication number: WO2013102772A2
Application number: PCT/HU2012/000139
Authority: WO
Inventors: Béla Nádas
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-02
Filing date: 2012-12-21
Publication date: 2013-07-11
Anticipated expiration: 2014-07-02
Also published as: HUP1200001A2; WO2013102773A1; WO2013102772A3

Description

Medium forwarding unit with circulating blade for transporting gaseous mediums

The invention relates to a medium forwarding unit with a circulating blade for transporting gaseous mediums, which contains a medium forwarding space, a house encasing the internal space accommodating an inlet and outlet communicating with the medium forwarding space, push elements for the forced circulation of the medium between the inlet and the outlet and a forwarding body carrying these push elements, and a regulating body allocated to the forwarding body via a movement coordinating part-unit, where the regulating body has- locking pieces extending into the internal space of the house, and the forwarding body and the regulating body are inserted in the house in a removable way, there are at least two push elements on the same forwarding body, the push elements are identical to each other, and the space part covered by the push elements has the ring shape of a body of rotation, and the push elements have a geometrical shape suiting the cross-sectional size and shape of the medium forwarding space, filling the cross-section of the medium forwarding space.

Numerous pump constructions have become known for the forwarding of liquid and gaseous mediums. These also include solutions, where the medium to be forwarded is forced to move from the inlet port to the outlet port by blade-like appendages moved in a suitable constructed channel.

Such a solution is described for example in patent specification No FR 789.912, where in the house of the equipment there are two circular discs moving in one direction coordinated with each other and arranged on axes of rotation parallel to each other, with two cylindrical ring sector shaped blade-like pistons protruding from both circular discs. In the house there is a working space, the actual volume of which - that can be filled with the transported medium - changes continuously because of the movement of the pistons.

The disadvantage of the solution is that due to its operation, during the movement of the pistons - as shown in figure 3 attached to the specification - the two cylindrical ring shaped volumes and the intermediate working space are linked together for a certain period, i.e. a completely free figure eight shaped working space is created. As a result of this the significant disadvantage of the construction is that it is not suitable for the continuous realisation of permanent-volume medium transportation.

This deficiency is eliminated by the medium forwarding unit described in document WO 2010/14001 1. In this case too there are circulating push elements constructed as blades realising flow, which transport the medium from the inlet port towards the outlet port moving in a ring-like channel. In the construction there is also an equalising space, which is filled with the transported medium during the operation of the device and periodically communicates with the channel-like passage for moving the medium during operation. The solution is excellently suitable for the constant transportation of liquid mediums, but in the case of gaseous substances the medium entering and occupying the equalising space - due to its nature - gets compressed periodically, so the amount of the transported medium is not constant. As a result of this deficiency the given solution is not suitable for the constant transportation of gaseous mediums.

With the construction according to the invention our aim was to eliminate the deficiencies of the known medium forwarding units with a circulating blade and to create a version, which has a simple structural construction and is still suitable for the efficient transportation of gaseous mediums besides a minimal loss during forwarding, so that the manufacturing costs of the equipment remain at a favourable level and the costs incurred during operation also remain acceptable.

The construction according to the invention is based on the recognition that if the shape of the passage for forwarding the transported medium and the shape and tracing of the path locking pieces suitable for the periodical opening and closing of this passage is constructed in the house in a way other than the ordinary, and the gaseous medium transported by the push elements is allowed to get behind the push element from its position in front of the push element in certain parts of the medium forwarding space, then with the device construction in this way even gaseous mediums can be transported efficiently, with a small loss during forwarding, and so the task can be solved. In accordance with the set aim, the medium forwarding unit with a circulating blade for transporting gaseous mediums, - which contains a medium forwarding space, a house encasing the internal space accommodating an inlet port and an outlet port communicating with the medium forwarding space, push elements for the forced circulation of the medium between the inlet port and the outlet port and a forwarding body carrying these push elements, and a regulating body allocated to the forwarding body via a movement coordinating part-unit, where the regulating body has locking pieces extending into the internal space of the house, and the forwarding body and the regulating body are inserted in the house in a removable way, there are at least two push elements on the same forwarding body, the push elements are identical to each other, and the space part covered by the push elements has the ring shape of a body of rotation, and the push elements have a geometrical shape suiting the cross-sectional size and shape of the medium forwarding space, filling the cross-section of the medium forwarding space, - is constructed in such a way that the internal space of the house is supplemented with a passage channel suiting the size and shape of the locking pieces of the regulating body and allowing the locking pieces of the regulating body to move around freely, where the locking pieces have a geometrical shape filling the cross-section of the passage channel, and the medium forwarding space and the passage channel intersect each other at two crossing points, and by-pass gaps situated in the environment of the inlet port and the outlet port are cut into the delimiting surface of the medium forwarding space.

A further criterion of the medium forwarding unit with a circulating blade can be that the passage channel has the ring shape of a body of rotation.

In the case of a version of the medium forwarding unit with a circulating blade both crossing points are situated in the same section of the medium forwarding space between the inlet port and the outlet port, and a passage facilitating flow is cut into the delimiting surface of the medium forwarding space between the crossing points.

In the case of a different realisation of the invention only one of the crossing points is situated along the same section of the medium forwarding space between the inlet port and the outlet port, and a passage facilitating flow is cut into the delimiting surface of the medium forwarding space in the environment of the crossing point situated after the inlet port following the moving direction of the push elements.

From the aspect of the medium forwarding unit with a circulating blade it may be favourable that there are at least two locking pieces arranged on the same regulating body, and that the number of the push elements situated on the same forwarding body is the same as the number of locking pieces arranged on the same regulating body.

In the case of a further form of execution of the invention, the external delimiting surface of the locking pieces and the internal delimiting surface of the locking pieces is a cylinder jacket section, and the locking pieces are evenly spaced on the regulating body, and in a given case the external delimiting surface of the push elements and the internal delimiting surface of the push elements is a cylinder jacket section, and the push elements are evenly spaced on the regulating body.

The medium forwarding unit according to the invention has numerous favourable characteristics. The most important one of these is that even in the case of gaseous mediums continuous and efficient medium transportation can be realised with a low loss during forwarding, both at a low and high regulation number. Moreover, due to the specific construction, in the case of a gaseous medium, besides transportation the unit can also be used for compressing the medium on the part of the medium near the outlet port, which, due to the novel construction practically results in an extended field of use.

Another advantage is that the medium forwarding unit according to the invention can also be used in the case of the transportation of a low amount of gaseous medium forwarded at a low revolution number.

A further advantage is that due to the shape and arrangement of the forwarding body and the push elements, and the regulating body and the locking pieces, the rotating moving elements do not burden the moving axles, which results in significantly less abrasion and wear due to friction, so the lifetime of the medium forwarding unit is longer and there is a lower probability of failure.

It can also be regarded as an advantage that due to the specific regulation of the locking of the inlet port, the outlet port and the passage channel and due to the use of the by-pass gap influencing the amount of the transported medium and the use of the passage facilitating flow there is reduced resistance of medium occurring during the flow of the forwarded medium, which also improves the operating parameters of the unit and has a favourable effect on consumption too. A further advantage deriving from this is that the operation of the medium forwarding unit is more cost-efficient than that of the known versions.

Below the medium forwarding unit according to the invention is described in connection construction examples, on the basis of drawings. In the drawings figure 1 is the side-view of a version of the medium forwarding unit according to the invention, partly in section,

figure 2 shows a section of the medium forwarding unit as in figure 1 taken along plane II-II,

figure 3 is the view of a possible form of execution of the forwarding body, figure 4 is the view of a possible form of execution of the regulating body, figure 5 is the top view of a possible form of execution of the internal space in a version of the medium forwarding unit according to the invention figures 6 a-d is the diagrammatic view of the internal space as in figure 5 and the structural elements inside it, in typical positions during a single rotation of the structural elements,

figure 7 is the top view of the possible internal space in the case of another version of the medium forwarding unit according to the invention, figures 8 a-c is the diagrammatic view of the internal space as in figure 7 and the structural elements inside it in typical positions during a single rotation of the structural elements. Figures 1 and 2 show a version of the medium forwarding unit according to the invention, which, due to its structural construction, is also suitable for the constant transportation of gaseous mediums. It can be seen that the house 10 of the medium forwarding unit consists of two parts: the first house-part 1 1 and the second house-part 12. The first house-part 1 1 and the second house-part 12 enclose the insert 13, the forwarding body 30 and the regulating body 40, and the internal space 20 delimited by the latter two.

The forwarding body 30 is set in the recess 1 la of the first house-part 1 1 in a rotatable way, while the insert is fitted at the same place in a fixed position. On the insert 13 attached to the first house-part 1 1 in a fixed position there is the regulating body, which can also be rotated. The forwarding body 30 and the regulating body 40 arranged in this way are covered by the second house-part 12, in the shaped nest 12a of which there is the regulating body 40, and the second house-part 12 also contains the first axle hole 14 and the second axle hole 15. The axle 33 of the forwarding body 30 extends through the first axle hole 14 of the second house-part 12, while the axle 43 of the regulating body 40 extends through the second axle hole 15 of the second house-part 12.

The axle 33 of the forwarding body 30 - in the case of this form of execution - is in torque transferring connection with the driving element 51 of the movement-coordinating part-unit 50 situated beyond the house 10, while the driven element 53 of the movement- coordinating part-unit 50 is connected to the axle 43 of the regulating body 40. The driving element 51 and the driven element 53 are linked together by the intermediate member 52, so that the rotation of the forwarding body 30 and the regulating body are coordinated with each other.

In the present case the driving element 51 and the driven element 53 are cogwheels, while the intermediate member 52 is a timing belt, but obviously a movement-coordinating part-unit 50 formed by different elements can also be suitable for performing the task, the main point is that with the cooperation of the movement-coordinating part-unit 50 the push element 31 and the push element 32 of the forwarding body 30, and the locking piece 41 and the locking piece 42 of the regulating body 40 should move around the axis of rotation 34 of the forwarding body 30 and the axis of rotation 44 of the regulating body 40 so as to enable the gaseous medium to be forwarded as desired, besides appropriate sealing, from the inlet port 21 of the internal space 20 to the outlet port 22 of the internal space 20.

In the case of the given form of execution the shaped nest 12a of the second house-part 12 does not simply accommodate a part of the regulating body 40, but the internal space 20 itself is also basically delimited by this shaped nest 12a.

It can be seen in figure 2 how the internal space 20 is situated inside the house 10. The medium forwarding space 23, which has the shape of a straight circular cylinder ring in this case, connects the inlet port 21 and outlet port 22 forming a part of the internal space 20. The first push element 31 and the second push element 32 of the forwarding body 30 move around and around inside this medium forwarding space 23. The passage channel 24, which also has the shape of a straight circular cylinder ring, also belongs to the internal space 24. The first locking piece 41 and the second locking piece 42 of the regulating body 40 move around and around inside the passage channel 24. The medium forwarding space 23 of the internal space 20 and the passage channel 24 intersect each other at crossing point 25 and crossing point 26.

In figure 3 the forwarding body 30 can be seen. Here the forwarding body 30 is a straight circular cylinder disc, and the first push element 31 and the second push element 32 extend out from its edge. The push element 31 and the push element 32 are centrally symmetric with respect to the axis of rotation 34 of the axle 33 of the forwarding body 30. The external delimiting surface 31a and internal delimiting surface 31b of the push element 31 itself, and the external delimiting surface 32a and internal delimiting surface 32b of the push element 32 are straight circular cylinder sections, the curve of which suits the delimiting surface 23a of the straight circular cylinder ring shaped medium forwarding space 23 of the internal space 20 not shown in figure 3. The external edge 31c of the push element 31 and the external edge 32c of the push element 32 extend down to the bottom of the shaped nest 12a of the second house-part 12 forming a part of the delimiting surface 23a of the medium forwarding space not shown in figure 3 either. In figure 4 the regulating body 40 can be seen. It can be observed here again that the first locking piece 41 and the second locking piece 42 extend out from the edge of the regulating body 40 having the shape of a straight circular cylinder disc. The locking piece 41 and the locking piece 42 are centrally symmetric with respect of the axis of rotation 44 of the axle 43 of the regulating body 40. It is also obvious that the external delimiting surface 41 a and internal delimiting surface 41b of the locking piece 41 , and the external delimiting surface 42a and internal delimiting surface 42b of the locking piece 42 have the shape of a straight circular cylinder ring section, the curve of which suits the shape and size of the passage channel 24. The external edge 41c of the locking piece 41 and the external edge 42c of the locking piece 42 reach down to the first house-part 1 1 of the house 10 not shown in figure 4. Between the locking piece 41 and the locking piece 42 of the regulating body 40 there are two free space parts 45. The dimensions of the free space parts 45 suit the corresponding dimensions of the push element 31 and the push element 32 of the forwarding body 30 shown in figure 3.

In figure 3 and 4 the difference between the form of the forwarding body 30 and the regulating body 40 can be seen: while the push element 31 and the push element 32 of the forwarding body 30 have a short curve, the locking piece 41 and the locking piece 42 of the regulating body 40 have a definitely long curve. This difference is due to the different functions of the components. The task of the push element 31 and the push element 32 is to forward the medium flowing into the medium forwarding space 23. A narrow push element 31 and push element 32 is enough to fill this function. At the same time, the task of the locking piece 41 and the locking piece 42 is to keep the crossing point 25 and the crossing point 26 closed at given periods during the movement of the push element 31 and the push element 32 of the forwarding body, in order to enable the medium forwarded with the help of the forwarding body 30 to carry on flowing only in a given direction.

On returning to figure 1 now, it can be seen there that in the currently shown position of the forwarding body 30, the external edge 31c of the push element 31 of the forwarding body just reaches the delimiting surface 23a of the medium forwarding space 23 situated in the second house-part 12 of the house 10, which delimiting surface 23a is basically formed by the shaped nest 12a of the second house-part 12 of the house 10, while the external edge 32c of the push element 32 just reaches the bottom of the recess of the section of the medium forwarding space 23 created in the insert 13 of the house 10. In the given position of the regulating body 40 the external edge 41c of the locking piece 41 of the regulating body 40 touches the forwarding body 30 inserted in the first house-part 1 1 of the house 10, while the external edge 42c of the locking piece 42 extends down to the first house-part 1 1 of the house 10.

Figure 5 shows a possible form of the internal space 20 - also shown in figure 2 - of the medium forwarding unit according to the invention. We can see here again the outlet port 21 and inlet port 22 forming parts of the internal space 20, as well as crossing point 25 and crossing point 26 created at the intersection of the medium forwarding space 23 and the passage channel 24. The crossing point 25 is situated near the inlet port 21 , while the crossing point 26 is situated in the vicinity of the outlet port 22. Progressing from the outlet port 22 in the direction of the outlet port 21 , along a given section of the medium forwarding space 23 there are both crossing point 25 and crossing point 26.

It can also be seen that on the part of the delimiting surface 23a of the medium forwarding space 23 near the inlet port 21 - following the anticlockwise direction of rotation of the forwarding body 30 -, after the crossing point 25 there is a by-pass gap 27, while in the vicinity of the outlet port 22, before the crossing point 26 there is another bypass gap 27. Between the crossing point 25 and the crossing point 26 there is a passage facilitating flowing 28. The task of the by-pass gaps 27 is to make it possible during the rotation of the forwarding body 30, in the given position of the push element 31 and the push element 32, for the gaseous medium accumulating before the push element 31 and the push element 32 to avoid the push element 31 and the push element 32 and get behind the push element 31 and the push element 32. It is important to emphasise that by all means the length of the by-pass gap 27 must exceed the length of the push element 31 and the push element 32 of the forwarding body 30, because only in this case can the medium avoid the push element 31 or the push element 32.

Basically the task of the passage facilitating flowing 28 is similar to the task of the bypass gap 27. The only difference is that because of the path of motion of the push element 31 and the push element 32 of the forwarding body 30 this section is even longer than the by-pass gap 27. Here this is the simplest way to avoid compression occurring at a place hindering appropriate operation along the section of the medium forwarding space 23 bordered by crossing point 25 and crossing point 26.

During the operation of the medium forwarding unit shown in figure 1 and 2, as a result of the torque exerted on the movement coordinating part-unit 50 the driving element 51 , and together with it the axle 33 of the forwarding body 31 attached to the driving element 51 start rotating around the axis of rotation 34. However, due to the effect of the intermediate member 52 the driven element 53 starts to rotate too, as a result of which the axle 43 of the regulating body 40 attached to the driven element 53 also starts to rotate around the axis of rotation 44. Due to the movement coordinating part-unit 50 the rotation of the forwarding body 30 and the regulating body 40 is coordinated during the entire operation of the medium forwarding unit. During the rotation of the axle 33 around the axis of rotation 34 the push element 31 and the push element 32 of the forwarding body 30 also rotate around the axis of rotation 34 inside the medium forwarding space 23 of the internal space 20 of the house 10. For the easier understanding of the operation of the medium forwarding unit the given positions of the push element 31 are shown in figure 5 and in figures 6 a-d.

Viewing figure 5 as the initial state, there the push element 31 is situated after the inlet port 21 of the medium forwarding space 23, and when it moves it rotates anticlockwise around the axis of rotation 34, in the direction of the outlet port 22 of the medium forwarding space 23. At the same time the locking piece is at the crossing point 25 where the medium forwarding space 23 and the passage channel 24 intersect each other, closing by this the medium forwarding space 23 crosswise at the crossing point 25, while the locking piece 42 does the same at the crossing point where the medium forwarding space 23 and the passage channel 24 intersect each other. The locking piece 41 and the locking piece 42 also rotate anticlockwise around the axis of rotation 44.

So the inlet port 21 is free, but through it the medium can only get into the part of the medium forwarding space 23 between the crossing point 25 and the push element 31, that is behind the push element 31 following the direction of the movement of the push element 31. The free path of the medium transported in the part of the medium forwarding space 23 between the push element 31 and the push element 32 is closed by the push element 31 and the push element 32, while the medium situated in the part of the medium forwarding space 23 between the crossing point 26 and the crossing point 25 is blocked by the locking piece 42 at the crossing point 26 and by the locking piece 41 at the crossing point 25, so it is in static condition.

The part of the medium forwarding space 23 between the push element 32 and the crossing point 26 communicates with the outlet port 22 allowing flow. Obviously, if in the continuation of the outlet port 22 - not shown in the figures - favourably there is a check valve, then no flow is possible from the outlet port 22 into this section of the medium forwarding space 23.

Figure 6 a shows a position of the medium forwarding unit, when the push element 31 and the locking piece 41 carry on rotating anticlockwise. In this arrangement the push element 31 is moving away from the inlet port 21 , while the locking piece has carried on rotating, and the free space part 45 between the locking piece 41 and the locking piece 42 has got closer to the crossing point 25, but the locking piece 41 is still keeping the crossing point 25 closed. In this way, while the push element 31 is moving, the section of the medium forwarding space 23 between the push element 31 and the locking piece 41 grows, and the transported medium can flow continuously through the inlet port 21 into the given section of the medium forwarding space 23. In the meantime the push element 32 reaches the outlet port 22, and it pushes out the remaining transported medium from the section of the medium forwarding space 23 between the push element 32 and the locking piece 42 through the outlet port 22, and closes the outlet port 22 after passing in front of it. In this way, however, the pressure of the transported medium remaining in the section of the medium forwarding space 23 between the push element 32 and the locking piece, which is still keeping the crossing point 26 closed, increases. Although at this point no transported medium is flowing out through the outlet port 22 from the medium forwarding space 23 of the internal space 20 as it has been closed by the push element 32, but the push element 32 gets next to the by-pass gap 27 situated near and before the crossing point 26. As a result of this the transported medium with increased pressure locked in between the locking piece 42 and the push element 32 can get through the by-pass gap 27 and behind the push element 32 from its position in front of the push element 32, and in this way it gets into the section of the medium forwarding space 23 between the push element 32 and the push element 31.

At this point the locking piece 42 is still keeping the crossing point 26 closed, but the locking piece 41 has closed crossing point 25 too, so in the space part between crossing point 26 and crossing point 25 is still in a static condition.

6 b shows the position when the push element 32 leaves the outlet port 22 making it possible for the transported gaseous medium locked in between the push element 32 and the push element 31 to flow out through the outlet port 22 from the part of the medium forwarding unit 23 between the push element 32 and the push element 31. By this point, however, the push element 32 has left the by-pass gap 27 situated near the outlet port 22 and closed it again, preventing by this the transported medium from flowing back behind the push element 32 from the space part between the crossing point 26 and the crossing point 25.

In this movement phase the locking piece 42 has already backed out from the crossing point 26, and now the free space part 45 between the locking piece 41 and the locking piece 42 is there, but the locking piece 41 is still situated at the crossing point 25 and it locks the transported medium situated between the locking piece 41 and the push element 32 away from the outlet port 21 situated after the crossing point 25. In this position the next batch of transported medium is flowing freely through the inlet port 21 into the section of the medium forwarding space 23 behind the crossing point 25 and the push element 31.

In figure 6 c the position of the push element 32 and the locking piece 42 can be seen, when the push element 32 gets into the section of the medium forwarding space 23 between the crossing point 26 and the crossing point 25. The free space part 45 between the locking piece 41 and the locking piece 42 passes in front of the crossing point 26, and now the locking piece 41 covers the crossing point 26. The push element 32 carries on moving continuously in the part of the medium forwarding space 23 between the crossing point 26 and the crossing point 25, while the passage of the crossing point 25 is covered by the locking piece 41. In order to make sure that while the push element 32 carries on rotating it does not compress the gaseous medium in the section of the medium forwarding space 23 between the crossing point 26 and the crossing point 25 hindering by this the appropriate operation of the medium forwarding unit according to the invention, in the delimiting surface 23a of this section of the medium forwarding space 23 there is a passage facilitating flow 28. The passage facilitating flow 28 widens the medium forwarding space 23 so as to ensure that the gaseous medium situated between the push element 32 and the locking piece 41 closing the crossing point 25 can pass next to the push element 32 and get behind the push element 32 from its position in front of the push element 32.

While the push element 32 moves from the direction of the crossing point 26 in the direction of the crossing point 25, the push element 31 gets closer and closer to the outlet port 22 situated at the crossing point 26. While it progresses, the push element 31 pushes in front of it the transported medium, which, with regard to that the locking piece 41 has already closed the crossing point 26, can leave the medium forwarding space 23 only through the outlet port 22.

Finally, as it is shown in figure 6 d, the push element 32 approaches the crossing point 25 and leaves the passage facilitating flow 28 situated between the crossing point 26 and the crossing point 25. During this time the locking piece 41 also carries on rotating, and the free space part 45 between the end of the locking piece 41 and the beginning of the locking piece 42 also reaches the crossing point 25. By the time the crossing point 25 would become free, the free space part 45 gets there from the locking piece 41 , and by this point the beginning of the push element 32 also reaches the crossing point 25 and closes it. In this way, during the movement of the push element 31 the transported medium flowing from the inlet port 21 into the medium forwarding space still cannot find its way towards the crossing point 25. As the push element 32 passes in front of the inlet port 21 and closes it, between the rear edge of the push element 31 and the front edge of the push element 32 the next batch of transported medium accumulates, which, during the rotation of the forwarding body 30, gets from the inlet port 21 to the outlet port 22 while it is locked in between the push element 31 and the push element 32. And then the process described above starts again.

In figure 7 a version of the medium forwarding unit according to the invention can be seen, where the construction of the internal space 20 is different to what is described in figure 5. Here the inlet port 21 and outlet port 22 of the internal space 20 are favourably situated near each other, on the same side of the house 10. Obviously the inlet port 21 is situated in the house 10 so that it avoids the passage channel 24 of the locking piece 41 and the locking piece 42. It can be seen that in the case of this construction, on a certain section of the medium forwarding space 23 between the inlet port 21 and the outlet port 22 there is only one crossing point, either crossing point 25 or crossing point 26.

In the present case there is a by-pass gap 27 both in the vicinity of the inlet port 21 and the outlet port 22, but here, unlike in the case of the solution shown in figure 2, the passage facilitating flow 28 is situated at the crossing point 26. Another difference is that the passage facilitating flow 28 is constructed in such a way that it goes around the passage channel 24, and so at the crossing point 26 the passage facilitating flow enables permanent flow between the sections of the medium forwarding space 23 before the crossing point 26 and after the crossing point 26. In a given position of the medium forwarding unit shown in figure 7, the push element closes the outlet port 22, while the locking piece 41 stays at the crossing point 25, and the locking piece 42 stays at the crossing point 26.

In the position shown in figure 8 a the push element turning in anticlockwise direction leaves the outlet port 22 allowing by this the push element 32 to push the transported medium through the outlet port 22 as it progresses. At the same time as the push element 31 turns, the locking piece 41 also turns in anticlockwise direction, as a result of which the free space part 45 between the locking piece 41 and the locking piece 42 gets to the crossing point 25, allowing the push element 31 to pass through the crossing point 25.

During this time the locking piece 42 keeps the crossing point 26 closed, so the medium flowing from the inlet port 21 into the medium forwarding space 23 cannot escape from the section of the medium forwarding space 23 between the push element 32 and the locking piece 42 situated at the crossing point 26.

It can be seen in figure 8 b that the push element 31 reaches and closes the inlet port 21 , and the locking piece 42 enters the crossing point 25 locking away by this the medium forwarding space 23. In the meantime the push element 32 carries on moving towards the crossing point 25 and by this it presses the transported medium situated in the section of the medium forwarding space 23 between the push element and the closed crossing point 25 into the outlet port 22. As the push element 31 moving towards the crossing point 26 leaves the inlet port 21 , it pushes in front of it the transported medium, which passes through the passage facilitating flow 28 situated at the crossing point 26 avoiding the locking piece 42 situated at the crossing point 26 and progresses in the medium forwarding space 23. The task of the passage facilitating flow 28 situated at the crossing point 26 is to ensure that the transported medium moving in front of the push element 31 does not get blocked in the locking piece 42 resulting in increased pressure during the operation of the medium forwarding unit.

In figure 8 c the moment of the operation of the medium forwarding unit can be seen, when the locking piece 42 turns out of the crossing point 26, and the push element 31 reaches the crossing point 26. In this phase of the operation the transported medium carries on flowing into the continuously increasing section of the medium forwarding space 23 between the push element 31 and the locking piece 42 closing the crossing point 25, while the push element 32 pushes in front of it the transported medium situated in the continuously reducing section of the medium forwarding space 23 between the push element 32 and the outlet port 22, and pushes it out through the outlet port 22.

In the following the push element 31 passes through the crossing point 26, and soon afterwards the push element 32 reaches the outlet port 22, closes it and then opens it as it carries on moving towards the inlet port 21, and by this point the transported medium retained in the section of the medium forwarding space 23 between the rear end of the push element 32 and the front end of the push element 31 can get out through the outlet port 22 to the place of use.

The medium forwarding unit according to the invention can be favourably used everywhere, where the transported medium is gaseous, and where efficient medium transportation with a minimal loss is an essential operation requirement, for example in the field of chemical and pharmaceutical industry.

List of references house 1 1 first house-part

1 1a recess

12 second house-part

12a shaped nest

13 insert

14 first axle hole

15 second axle hole

internal space 21 inlet port

22 outlet port

23 medium forwarding space 23a delimiting surface

24 passage channel

25 crossing point

26 crossing point

27 by-pass gap

28 passage facilitating flow forwarding body 31 push element

31 a external delimiting surface 31b internal delimiting surface

31 c external edge

32 push element

32a external delimiting surface 32b internal delimiting surface 32c external edge

33 axle

34 axis of rotation

regulating body 41 locking piece

41a external delimiting surface 41b internal delimiting surface 41c external edge

42 locking piece

42a external delimiting surface 42b internal delimiting surface 42c external edge

43 axle

44 axis of rotation

45 free space part

movement coordinating part-unit 51 driving element

52 intermediate member

53 driven element

Claims

1. Medium forwarding unit with a circulating blade for transporting gaseous mediums, which contains a medium forwarding space (23), a house (10) encasing the internal space (20) accommodating an inlet port (21) and an outlet port (22) communicating with the medium forwarding space (23), push elements (31, 32) for the forced circulation of the medium between the inlet port (21) and the outlet port (22) and a forwarding body (30) carrying these push elements (31 , 32), and a regulating body (40) allocated to the forwarding body (30) via a movement coordinating part-unit (50), where the regulating body (40) has locking pieces (41 , 42) extending into the internal space (20) of the house (10), and the forwarding body (30) and the regulating body (40) are inserted in the house ( 10) in a removable way, there are at least two push elements (31 , 32) on the same forwarding body (30), the push elements (31 , 32) are identical to each other, and the space part covered by the push elements (31, 32) has the ring shape of a body of rotation, and the push elements (31 , 32) have a geometrical shape suiting the cross-sectional size and shape of the medium forwarding space (23), filling the cross-section of the medium forwarding space (23), characterised by that the internal space (20) of the house (10) is supplemented with a passage channel (24) suiting the size and shape of the locking pieces (41 , 42) of the regulating body (40) and allowing the locking pieces (41 , 42) of the regulating body (40) to move around freely, where the locking pieces (41 , 42) have a geometrical shape filling the cross-section of the passage channel (24), and the medium forwarding space (23) and the passage channel (24) intersect each other at two crossing points (25, 26), and by-pass gaps (27) situated in the environment of the inlet port (21) and the outlet port (22) are cut into the delimiting surface (23a) of the medium forwarding space (23).

2. Medium forwarding unit with a circulating blade as in claim 1 , characterised by that the passage channel (24) has the ring shape of a body of rotation.

3. Medium forwarding unit with a circulating blade as in claim 1 or 2, characterised by that both crossing points (25, 26) are situated in the same section of the medium forwarding space (23) between the inlet port (21) and the outlet port (22), and a passage facilitating flow (28) is cut into the delimiting surface (23a) of the medium forwarding space (23) between the crossing points (25, 26).

4. Medium forwarding unit with a circulating blade as in claim 1 or 2, characterised by that only one of the crossing points (25, 26) is situated along the same section of the medium forwarding space (23) between the inlet port (21) and the outlet port (22), and a passage facilitating flow (28) is cut into the delimiting surface (23a) of the medium forwarding space (23) in the environment of the crossing point (26) situated after the inlet port (21 ) following the moving direction of the push elements (31 , 32).

5. Medium forwarding unit with a circulating blade as in any of claims 1 -4, characterised by that there are at least two locking pieces (41 , 42) arranged on the same regulating body (40).

6. Medium forwarding unit with a circulating blade as in any of claims 1 -5, characterised by that that the number of the push elements (31, 32) situated on the same forwarding body (30) is the same as the number of locking pieces (41 , 42) arranged on the same regulating body (40).

7. Medium forwarding unit with a circulating blade as in any of claims 1-6, characterised by that the external delimiting surface (41 a, 42a) of the locking pieces (41 , 42) and the internal delimiting surface (41b, 42b) of the locking pieces (41 , 42) is a cylinder jacket section, and the locking pieces (41, 42) are evenly spaced on the regulating body (40).

8. Medium forwarding unit with a circulating blade as in any of claims 1 -7, characterised by that the external delimiting surface (31 a, 32a) of the push elements (31 , 32) and the internal delimiting surface (31b, 32b) of the push elements (31 , 32) is a cylinder jacket section, and the push elements (31 , 32) are evenly spaced on the regulating body (40).