JPH0124384Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a vibratory compressor, in particular, an annular gap formed between a permanent magnet and a pole piece in a cylindrical casing with both ends closed, is energized by alternating current. A drive coil is disposed to be reciprocally movable in the axial direction of the casing, and a member having a cylinder portion for vibrationally loosely fitting a piston that is substantially integrated with the drive coil is integrally provided in the casing; The member having a cylinder portion includes a discharge valve chamber of the cylinder portion that accommodates a discharge valve, a pressing coil spring that biases the discharge valve in a direction to close the discharge valve, and a liner that guides the discharge valve. The present invention relates to a vibratory compressor in which a high pressure chamber is formed concentrically with the discharge valve chamber and communicates with the discharge valve chamber on the side of the discharge valve chamber.

Conventionally, in this type of vibratory compressor, a small hole is formed in the liner to communicate the discharge valve chamber and the high pressure chamber. However, since the liner is made of hard, high-carbon steel with high wear resistance in order to guide the discharge valve, drilling the small holes is troublesome.

The present invention aims to solve such conventional technical problems and provide a vibratory compressor that does not require troublesome liner machining operations.

In order to achieve the above object, the present invention provides a vibratory compressor of the type described above, in which the liner is formed into a hollow cylindrical shape with both ends open, and has a slit extending over the entire axial length of the liner to form a discharge valve chamber. The inner peripheral wall of the discharge valve chamber is recessed with an annular groove that surrounds the entire outer peripheral surface of the liner, and the annular groove communicates with the high pressure chamber. It is characterized by

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIG. A pair of pistons 2 and 3 are disposed symmetrically with respect to the center, and these pistons 2 and 3 reciprocate in opposite directions by supplying alternating power to corresponding drive coils 4 and 5, respectively, and move fluid such as The refrigerant is sucked and discharged.

The casing 1 is constructed by fitting and fixing a pair of closing members 7 and 8 to both ends of a cylindrical body 6. Both of the closing members 7 and 8 are basically cylindrical and integrally provided with flanges 9 and 10 extending radially outward at each end, and these flanges 9 and 10 form a cylindrical body. 6
is fitted and fixed to both ends of the That is, thin-walled portions 11 and 12 are provided at both ends of the cylindrical body 6, and the flanges 9 and 10 of the respective closing members 7 and 8 are fitted into these thin-walled portions 11 and 12, respectively, so that the thin-walled portions 11 , 12 are caulked and bent as shown in the figure to construct the casing 1. In addition, by welding the caulked portions as described above, the fixation between the closing members 7 and 8 and the cylindrical body 6 is further ensured.

In this way, since the casing 1 is constructed by fitting and fixing the closing members 7 and 8 of the same shape to both ends of the cylindrical body 6, the structure of the casing 1 is extremely simplified and the assembly efficiency is improved.

In the central part in the axial direction inside the casing 1,
A partition member 13 basically shaped like a thick disk is fixed to the inner surface of the cylindrical body 6, thereby partitioning the inside of the casing 1 into a pair of low pressure chambers 14 and 15.

In both low pressure chambers 14 and 15, permanent magnets 16 and 17 are fixed in a ring shape on the inner surface of the cylindrical body 6 near both ends thereof, respectively. Also, both closing members 7, 8
There is an annular gap 1 between the permanent magnets 16 and 17.
8, 19 to form a ring-shaped pole piece 2
0 and 21 are fixed or integrally molded, respectively. Drive coils 4 and 5 are arranged in each gap 18 and 19 so as to be able to reciprocate in the axial direction of the casing 1, respectively. These drive coils 4, 5 are wound around support members 22, 23, respectively, and each support member 22, 23 is fixed to a cylindrical piston 2, 3 concentric with the axis of the casing 1, respectively.

One support member 22 has a base 24 that is basically disk-shaped and is fixed to the piston 2, and a base 24 that is fixed to the peripheral edge of the base 24 at intervals in the circumferential direction and extends parallel to the axis of the piston 2. It consists of a plurality of support parts 25, and a drive coil 4 is wound around one end of each support part 25. The other support member 23 has a base portion 26 and a support portion 27 and is formed in the same manner as the one support member 22. The drive coil 5 is wound around one end of the support portion 27, and the base portion 26 is connected to the piston 3. is fixed to. In this way, each drive coil 4, 5
and the corresponding pistons 2, 3 are substantially integrated.

Support parts 25 and 2 in each support member 22 and 23
Blade plates 28 and 29 are provided at the other ends of drive coils 4 and 5 at right angles to the moving direction of drive coils 4 and 5, respectively. These blade plates 28, 29 function to scatter lubricating oil into the respective low pressure chambers 14, 15 when the drive coils 4, 5 and the pistons 2, 3 integral therewith reciprocate.

Insulating plates 3 made of electrically insulating material are provided on the inner end surfaces of the closing members 7 and 8 at both ends of the casing 1.
A receiving plate 3 made of conductive material via 1 and 32
3 and 34 are brought into contact with each other. Further, on the surfaces of the bases 24 and 26 of each support member 22 and 23 facing the closing members 7 and 8, receiving plates 37 and 38 made of a conductive material are provided via insulating plates 35 and 36 made of an electrically insulating material. is brought into contact. Resonant coil springs 39, 40 are interposed between the receiving plates 33, 37 and 34, 38 facing each other, respectively.

On the surfaces of the bases 24 and 26 of the support members 22 and 23 facing the partition member 13, receiving plates 43 and 44 made of a conductive material are abutted, respectively, via insulating plates 41 and 42 made of an electrically insulating material. On both sides of the partition member 13, receiving plates 47 and 48 made of a conductive material are abutted, respectively, via insulating plates 45 and 46 made of an electrically insulating material. Resonant coil springs 49 and 50 are interposed between the receiving plates 43 and 47 and 44 and 48 that face each other, respectively.

In this way, the reciprocating motion of the drive coil 4 is amplified by the pair of resonant coil springs 39, 49, and the reciprocating motion of the drive coil 5 is amplified by the pair of resonant coil springs 40, 50. The pistons 2 and 3, which make an amplified reciprocating motion together with the drive coils 4 and 5, are slidably and loosely fitted into cylinder portions 51 and 52 that are integrally provided to the partition member 13, respectively.

Referring also to FIG. 2, the partition member 13 includes:
A through hole 53 concentric with the casing 1 is bored, and by fitting a pair of cylindrical cylinder bodies 54 and 55 from both ends into the through hole 53, both low pressure chambers 14 and 15 of the partition member 13 are connected. Cylinder portions 51 and 52 are each integrally provided in the facing portion. That is, in the middle of the through hole 53, there are two undercut stepped portions 5 facing outward in the axial direction.
6 and 57 are formed respectively, and a metal flow material 58 and 59 such as lead or copper is applied to these stepped portions 56 and 57 to form a cylindrical cylinder body 5.
4 and 55 are press-fitted into the through hole 53. As a result, the metal flow materials 58 and 59
6, 57 and an undercut stepped portion formed on the outer periphery of each cylinder body 54, 55,
Metal flow materials 58 and 59 flow between the outer circumferential surfaces of the cylinder bodies 54 and 55 and the inner circumferential surface of the through hole 53, respectively, to perform fixing and sealing functions.

Annular notches 60 and 61 are formed on the outer peripheries of mutually opposing ends of the cylinder bodies 54 and 55, respectively. A hollow cylindrical liner 62 with both ends open is inserted therein. In this way, a discharge valve chamber 63 is formed between the ends of both cylinder bodies 54, 55, which is common to both cylinder parts 51, 52. This discharge valve chamber 63 has valve seats 64, 6 formed on the end faces of each cylinder body 54, 55.
A pair of discharge valves 66, 67 which can be seated on the respective valves 5 and guided by a liner 62, and valve seats 64, 65 which are interposed between both discharge valves 66, 67 and which correspond to both discharge valves 66, 67. A pressing coil spring 68 that biases toward is housed.

In the discharge valve chamber 63, each discharge valve 66, 67
In this case, the corresponding pistons 2 and 3 are the cylinder parts 51,
When the piston 52 moves outward in the cylinder chambers 69, 70 to perform a suction operation, the spring force of the pressing coil spring 68 causes the valve to seat on the valve seats 64, 65 and close the valve. , 3 is the cylinder chamber 69, 7
The valve seats 64 and 65 resist the spring force of the pressing coil spring 68 when moving inward within 0 to perform a discharge operation.
The valve is opened by moving away from the valve, and the cylinder chambers 69 and 70 are communicated with the discharge valve chamber 63.

On the other hand, at the tips of the pistons 2 and 3 in each cylinder chamber 69 and 70, communication holes 71 and 72 are provided at the bottom.
Holding members 73 and 74 each having a cylindrical shape with a bottom are provided with suction valve chambers 75 and 7 between the tips of each piston 2 and 3.
6 and are fixed to each other. In these suction valve chambers 75 and 76, suction valves 79 and 80 that can be seated on valve seats 77 and 78 formed on the tip surfaces of each piston 2 and 3 are movable in the axial direction of the pistons 2 and 3. Each is retained.

In each suction valve chamber 75, 76, the piston 2,
3 moves outward in the cylinder chambers 69, 70 to perform a suction operation, the suction valves 79, 80 close to the valve seats 7.
7, 78 to communicate the inside of the pistons 2, 3 with the suction valve chambers 75, 76, and therefore the suction valve chambers 7
The insides of the pistons 2 and 3 are communicated with the cylinder chambers 69 and 70 through the pistons 5 and 76 and the communication holes 71 and 72. On the contrary, when the pistons 2, 3 move inward within the cylinder chambers 69, 70 and perform a discharge operation, the suction valves 79, 80 are seated on the valve seats 77, 78 and closed.

Furthermore, with reference to FIG. 3, the partition member 1
A hole 81 that opens laterally is bored in the side of 3, and when the partition member 13 is fixed to the inner surface of the cylindrical body 6, this hole 81 is closed by the inner surface of the cylindrical body 6 and the suction A chamber 82 is formed. An oil-impregnable porous metal or wire mesh 83 is inserted into the suction chamber 82 . Further, a suction pipe 84 is connected to the cylindrical body 6 so as to communicate with a suction chamber 82 .
4, a small amount of lubricating oil is sucked into the suction chamber 82 together with a fluid such as a refrigerant for an electric refrigerator. The partition member 13 is provided with a pair of suction holes 85 and 86 that open near the bottom of the suction chamber 82 and communicate with the low pressure chambers 14 and 15 on both sides of the partition member 13, respectively. Therefore, the sucked fluid is distributed from the suction chamber 82 to the suction holes 85, 86 and flows into the low pressure chambers 14, 15, respectively. Furthermore, the lubricating oil introduced into the suction chamber 82 diffuses into the porous metal or the wire mesh 83 by capillary phenomenon, and is further accompanied by the fluid from the suction holes 85, 86 to the low pressure chambers 14, 1.
It is divided into 5. Such lubricating oil is used in each low pressure chamber 1.
4, 15, the pistons 2, 3 and the inner surfaces of the cylinder chambers 69, 70 are lubricated. In addition, the lubricating oil diffused and contained in the porous metal and the wire mesh 83 becomes atomized when it is entrained in the fluid, so that it is uniformly distributed and supplied to the outer surfaces of the pistons 2 and 3. Furthermore, since the fluid sucked into the suction chamber 82 from the suction pipe 84 expands within the suction chamber 82, suction noise is effectively reduced. Then the suction chamber 82
has the function of a lubricating oil distributor and a muffler.

Discharge valve chamber 6 of through hole 53 in partition member 13
An annular groove 87 is recessed in the inner peripheral surface corresponding to No. 3 over the entire circumference thereof. On the other hand, the liner 62 is formed by bending a hard steel plate into a cylindrical shape so that a slit 88 remains between opposing ends, and when the outer diameter is free, it is given elasticity that expands more than the inner diameter of the through hole 53. . Therefore, no matter how the liner 62 is arranged within the through hole 53, it will not come into pressure contact with the inner surface of the through hole 53 and vibrate. can communicate with each other. The material of the liner 62 is
The slit 88 is required to be hard with excellent wear resistance in order to guide the slit 88.
By forming an annular groove 87 in the partition member 13, a hole for guiding the fluid from the discharge valve chamber 63 is provided in the liner, and the hole corresponds to the discharge hole bored in the partition member 13. This eliminates the need for the complicated work of arranging liners.

Referring again to FIG. 2, the partition member 13 is provided with a small diameter discharge hole 90 which communicates with the annular groove 87 at one end and communicates with the high pressure chamber 89 at the other end. The high pressure chamber 89 is formed by closing a hole 91 opened toward the right low pressure chamber 15 and bored in the partition member 13 parallel to the axis of the casing 1 with a lid member 92 .
The lid member 92 is basically in the shape of a thick disk, and is press-fitted into the hole 91 with a metal flow material 93 interposed between it and the undercut stepped portion of the hole 91 .

The fluid flowing into the high pressure chamber 89 from the discharge valve chamber 63 through the slit 88, the annular groove 87 and the discharge hole 90 expands as it flows into the high pressure chamber 89 from the small diameter discharge hole 90, thereby causing discharge noise. is reduced.

One end of a discharge pipe 94 that communicates with the high pressure chamber 89 is connected to a lid member 92 that closes the high pressure chamber 89, and this discharge pipe 94 extends through the right side low pressure chamber 15 along the inner surface of the cylindrical body 6. It is drawn out through a guide tube 95 provided in the closing member 8 and connected to a condenser of an electric refrigerator or the like. After the guide tube 95 is inserted into the through hole 96 formed in the closing member 8,
The one end portion 97 of the closing member 8 is welded by brazing.
It is fixed around the entire circumference. In addition, the low pressure chamber 15
Since it is necessary to keep the guide tube 95 airtight, the other end 98 of the guide tube 95 and the discharge tube 94 are also fixed over the entire circumference by brazing welding.

However, the position where the guide tube 95 is provided is close to the permanent magnet 17, as is clear from FIG. Therefore, if the one end 97 of the guide tube 95 is brazed and welded to the closure member 8 after the closure member 8 is fitted and fixed to the cylindrical body 6, the heat from the brazing welding will pass through the closure member 8 and the cylindrical body 6. The heat is transmitted to the permanent magnet 17 and has a thermal influence on the permanent magnet 17. Therefore, the guide tube 97 is inserted into the through hole 96 and brazed welded before the closing member 8 is fitted and fixed to the cylindrical body 6. Next, the closing member 8 is fitted and fixed to the cylindrical body 6 while the discharge tube 94 is inserted into the guide tube 95, and then the other end 98 of the guide tube 95 and the discharge tube 94 are brazed and welded. At this time, since the other end 98 of the guide tube 95 is in a position away from the permanent magnet 17, the permanent magnet 17 is not affected by heat due to brazing welding.

Both ends of the casing 1, that is, both closing members 7,
Sealed terminals 101 and 102 for connecting socket connection terminals 99 and 100 while keeping the insides of the respective low pressure chambers 14 and 15 airtight are inserted and fixed in 8 . In other words, through holes 103 and 104 concentric with the cylindrical body 6 are bored in both of the closing members 7 and 8, and a step formed in the middle of these through holes 103 and 104 faces inward of the casing 1. Sealed terminals 101, 10 are attached to circular bent edges 107, 108 of portions 105, 106.
2 are fixed to each other by projection welding.

The sealed terminal 101 has a cylindrical portion 109 and a conical portion 11.
0 and a holding frame 111 made of a conductive material.
A terminal rod 113 is held concentrically through a non-conductive material such as a glass body 112. This sealed terminal 101 is connected to the closing member 7 and the holding frame 11 in a state in which the outer surface of the conical portion 110 of the holding frame 111 is in line contact with the bent edge 107 over the entire circumference.
By creating a potential difference between 1 and 1, projection welding is performed. At this time, the outer circumferential surface of the cylindrical portion 109 in the holding frame 111 and the inner circumferential surface of the through hole 103 are close to each other, and there is a possibility that projection welding at the bent edge 107 may be inhibited. Therefore, when inserting the sealed terminal 101 into the through hole 103, the outer peripheral surface of the cylindrical portion 109 and the through hole 103
A cylindrical insulator 114 made of an electrically insulating material is interposed between the inner circumferential surface of the insulator and the inner circumferential surface of the insulator. This ensures that the conical portion 110 of the sealed terminal 101 is projection-welded at the line contact portion with the bent edge 107. In this way, the airtightness of the low pressure chamber 14 is maintained.

Moreover, the terminal rod 113 of the sealed terminal 101 passes through the insulating plate 31 and is fitted into the cylindrical connecting member 115 fixed to the receiving plate 33. Thereby, the terminal bar 113 is electrically connected to the receiving plate 33 via the connecting member 115.

The other sealed terminal 102 is the sealed terminal 10 described above.
1, a holding frame 118 consisting of a cylindrical part 116 and a conical part 117 holds a terminal rod 120 through a glass body 119, and a cylindrical insulator is provided between the cylindrical part 116 and the inner surface of the through hole 104. With the body 121 interposed, the bent edge 108 and the conical portion 117 are fixed by projection welding, and the terminal rod 12
0 is inserted into the cylindrical connecting member 136. In this way, the middle portions of the through holes 103 and 104 are hermetically closed by the sealed terminals 101 and 102.
From those sealed terminals 101 and 102 to the terminal bar 11
3,120 are respectively projected. These terminal bars 113, 120 have socket connection terminals 99,
100 are fitted respectively.

The socket connection terminals 99, 100 are formed by covering female terminal portions 122, 123 for receiving the terminal rods 113, 120 with insulating layers 124, 125 made of an electrically insulating material, such as synthetic resin,
On the outer surface of each insulating layer 124, 125, a plurality of retaining pawls 128, 129 are provided around the periphery, which are inclined radially outward from the open end portion and have step portions 126, 127 formed at the rear end. They are provided protrudingly at intervals in the direction. On the other hand, there are sealed terminals 10 in the middle of the through holes 103 and 104 in the closing members 7 and 8.
At a position axially spaced from 1,102,
Locking surfaces 130 and 131 that face the respective sealed terminals 101 and 102 and form a step are formed, respectively.

Each socket connection terminal 99, 100 is inserted into the through hole 103, 1 while bending the retaining claw 128, 129.
04, whereby the female terminal portion 12
The terminal rods 113 and 120 are fitted into the terminals 2 and 123 to be electrically connected. At this time, each retaining claw 12
8 and 129 are engaged with the locking surfaces 130 and 131, respectively, so that the socket connection terminals 99 and 10
0 is prevented from escaping from the through holes 103 and 104.

An AC power supply 132 and a switch 133 are connected in series between the socket connection terminals 99 and 100. Further, an insertion hole 134 is formed in the partition member 13 in parallel with the axis of the casing 1, and a covered connection wire 135 connecting the receiving plates 47 and 48 is inserted through the insertion hole 134. Further, the receiving plate 37 is connected to one end of the driving coil 4, the other end of the driving coil 4 is connected to the receiving plate 43, the receiving plate 44 is connected to one end of the driving coil 5, and the other end of the driving coil 5 is connected to the receiving plate 43, and the other end of the driving coil 5 is connected to the receiving plate 43. Connected to plate 38.

In this way, the AC power supply 132 is connected to the female terminal portion 122, the terminal bar 113, the connecting member 115, the receiving plate 33, the resonant coil spring 39, the receiving plate 37, the drive coil 4, the receiving plate 43, the resonant coil spring 49, and the receiving plate. 47, covered connection wire 135, receiving plate 48, resonant coil spring 50, receiving plate 44, drive coil 5, receiving plate 38, resonant coil spring 40, receiving plate 34, connection member 136, terminal bar 120, female terminal bar 12
3, and switch 133 to return to AC power supply 132 in sequence.

Here, the magnetization directions of the permanent magnets 16 and 17 will be explained as shown in FIG. 4. That is, if the inner surface of the permanent magnet 16 corresponding to one drive coil 4 facing the drive coil 4 is the N pole, the inner surface of the permanent magnet 17 corresponding to the other drive coil 5 facing the drive coil 5 is the S pole. It is considered to be extreme. On the contrary, the inner surface of the permanent magnet 16 may be the S pole and the inner surface of the permanent magnet 17 may be the N pole. In either case, the magnetization directions of both the permanent magnets 16 and 17 are opposite to each other, and The driving coils 4 and 5 are wound in the same direction.

In this way, when the switch 133 is turned on and an alternating current flows through both drive coils 4 and 5, magnetic forces in the drive coils 4 and 5 approach each other as shown by solid line arrows during a half cycle of the alternating current. F acts,
In the next half cycle, magnetic forces F act on both drive coils 4 and 5 in directions that separate them from each other as indicated by broken line arrows. In this way, by energizing both the drive coils 4 and 5 connected in series with alternating power, the drive coil 4, the piston 2, and the drive coil 5
and the piston 3 reciprocate in opposite directions.

Next, the operation of this embodiment will be explained. By turning on the switch 133 and energizing the drive coils 4 and 5 with alternating power, the pistons 2 and 3 reciprocate in opposite directions to suck fluid. , performs the discharge action. At this time, the directions of movement of both pistons 2 and 3 are opposite to each other, but when one is performing a discharge action, the other is also performing a discharge action.
Since the directions of vibration caused by the movements of the pistons 2 and 3 are opposite to each other, the vibrations cancel each other out.
Therefore, the vibrations exerted on the casing 1 become extremely small, making it possible to attach the casing 1 directly to an electric refrigerator, etc., which was conventionally necessary to prevent the vibrations of the casing from being exerted on the outside. The container can be omitted,
Miniaturization becomes possible. There is also the advantage that the casing 1 can be directly cooled by outside air. Furthermore, since the vibration system is divided into two parts, the vibration system has a relatively small capacity.
By combining the two vibration systems, it is possible to increase the capacity, and it is possible to extend the life of the resonant coil springs 39, 40, 49, and 50.

Due to the movement of both pistons 2 and 3 in mutually opposite directions, the fluid sucked into the suction chamber 82 from the suction pipe 84 is reduced to suction noise by the silencing effect due to the expansion in the suction chamber 82, and is distributed to the suction holes 85 and 86. and introduced into both low pressure chambers 14 and 15. Lubricating oil 137 accompanying the fluid introduced from the suction chamber 82 is stored in the lower portions of both the low pressure chambers 14 and 15, and this lubricating oil 137
Blade plates 28, 29 that reciprocate integrally with 3.
is scattered into the low-pressure chambers 14 and 15. This scattered lubricating oil uniformly adheres to the outer surfaces of the pistons 2 and 3, thereby achieving a lubricating effect between the pistons 2 and 3 and the inner surfaces of the cylinder chambers 69 and 70.
Smooth movement of both pistons 2, 3 is maintained.

The fluid in the low pressure chambers 14, 15 is connected to the pistons 2, 3
During the suction movement of the pistons 2 and 3 and the suction valve 7
It is introduced into the cylinder chambers 69, 70 through the pistons 9, 80, and further into the discharge valve chamber 63 through the discharge valves 66, 67 during the discharge movement of the pistons 2, 3. When the fluid discharged into the discharge valve chamber 63 flows into the high pressure chamber 89 through the discharge hole 90, it expands, its discharge noise is reduced, and is further led to a condenser of an electric refrigerator or the like through a discharge pipe 94.

In addition, as shown in FIG. 5, permanent magnets 16, 17
The winding directions of the drive coils 4 and 5 may be opposite to each other while the magnetization directions of the drive coils 4 and 5 are the same. Even in this case, the magnetic force F is applied to the drive coils 4 and 5 in the direction shown by the solid line arrow in the direction of mutual proximity in the half cycle of the alternating current, and in the next half cycle the magnetic force F is applied to the drive coils 4 and 5 so that they approach each other as shown in the broken line arrow. A magnetic force F in the opposite direction can be applied to.

It is also possible to connect the drive coils 4 and 5 in parallel so that the drive coils 4 and 5 can reciprocate in opposite directions.

As described above, according to the present invention, the permanent magnets 16 and 1 are placed inside the cylindrical casing 1 with both ends closed.
Drive coils 4 and 5, which are energized by alternating power, are arranged in annular gaps 18 and 19 formed between the pole pieces 7 and the pole pieces 20 and 21 so as to be movable back and forth in the axial direction of the casing 1. A member 13 having cylinder parts 51 and 52 for slidably and loosely fitting the pistons 2 and 3 substantially integrated with the pistons 4 and 5 is integrally provided in the casing 1, and the cylinder parts 51 and 52 are provided integrally with the casing 1. The member 13 having the above housing accommodates discharge valves 66 and 67, a pressing coil spring 6 that biases the discharge valves 66 and 67 in a direction to close them, and a liner 62 that guides the discharge valves 66 and 67. A discharge valve chamber 63 is formed concentrically with the cylinder chambers 69, 70 of the cylinder sections 51, 52, and a high pressure chamber 89 communicating with the discharge valve chamber 63 is formed on the side of the discharge valves 66, 67. In the vibratory compressor, the liner 62 is formed into a hollow cylindrical shape with both ends open, and has a slit 88 along its entire length in the axial direction, and is press-fitted to the inner circumferential wall of the discharge valve chamber 63. An annular groove 87 that surrounds the entire outer circumference of the liner 62 is formed in the inner peripheral wall of the discharge valve chamber 63.
is communicated with the high pressure chamber 89, so the setting of the liner 62 can be completed by simply fitting the elastically contracted and deformed liner 62 onto the inner circumferential wall of the discharge valve chamber 63; At the same time, the inside of the liner 62 can be communicated with the high pressure chamber 89 via the slit 88 and the annular groove 87, making assembly simple as a whole. Also, liner 6
Since the slit 88 for imparting elasticity to the liner 62 can be used as it is for the fluid passage, there is no need to drill a small hole in the liner 62. Even if the liner 62 is inserted into the annular groove 87, the inside of the liner 62 and the annular groove 87 can always be reliably communicated via the slit 88, so there is no need for any means for positioning the liner 62 in the rotational direction. The structure is extremely simple and can contribute to cost reduction.
Furthermore, since the slit 88 is wide open to the annular groove 87 over its entire width, there is no risk that the fluid passing inside and outside the liner 62 will be subjected to large throttling resistance, which can contribute to increasing the efficiency of the compressor.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is an overall vertical sectional view of an embodiment of the present invention, FIG. 2 is an enlarged vertical sectional view of the partition member 13 of FIG. 1 and its vicinity, and FIG. 3 is a sectional view taken along the line - FIG. 4 is a circuit diagram showing the magnetizing direction of the permanent magnets 16, 17 and the winding direction of the drive coils 4, 5 in a simplified manner in FIG. FIG. 4 is a simplified circuit diagram showing another example of the winding directions of No. 4 and No. 5; 1...Casing, 2, 3...Piston, 4,
5... Drive coil, 16, 17... Permanent magnet, 1
8, 19... Gap, 20, 21... Pole piece, 39, 40, 49, 50... Resonance coil spring, 51, 52... Cylinder section, 62... Liner, 63... Discharge valve chamber, 66, 67...discharge valve,
68... Pressing coil spring, 69, 70... Cylinder chamber, 87... Annular groove, 88... Slit, 90
...Discharge hole.

Claims (1)

[Scope of utility model registration request] A drive coil 4, which is energized by alternating power, is inserted into an annular gap 18, 19 formed between permanent magnets 16, 17 and pole pieces 20, 21 in a cylindrical casing 1 with both ends closed. a piston 2, which is arranged such that it can freely reciprocate in the axial direction of the casing 1, and is substantially integrated with the drive coils 4, 5;
A cylinder portion 51 for slidably and loosely fitting 3,
52 is integrally provided in the casing 1, and the member 13 having the cylinder portions 51, 52 includes discharge valves 66, 67, and the discharge valve 6.
The cylinder chambers 69, 70 of the cylinder portions 51, 52 have a discharge valve chamber 63 that accommodates a pressing coil spring 68 that biases the valves 6, 67 in the direction of closing the valves, and a liner 62 that guides the discharge valves 66, 67. In the vibratory compressor, the liner 62 has a hollow cylindrical shape with both ends open. Along with being formed,
The liner 62 has a slit 88 extending over its entire length in the axial direction and is press-fitted to the inner circumferential wall of the discharge valve chamber 63. A vibratory compressor characterized in that a surrounding annular groove 87 is recessed and the annular groove 87 communicates with the high pressure chamber 89.