JPH0442549Y2 - - Google Patents

Description

[Detailed explanation of the idea] A. Industrial application field The present invention relates to improvements in vane pumps.

B. Prior Art A conventional vane pump having a cantilevered horizontal rotating shaft has a liner fitted into the inner surface of a casing, and a rotor integrally formed with the rotating shaft is rotatably disposed within the liner. Two vanes, which are perpendicular to each other at the axis, are attached to the rotary shaft so as to be slidable in the radial direction. The rotor has vane grooves for the two vanes opened in all directions, and a large diameter hole for tightening the rotor fixing bolt in the center on the side opposite to the rotating shaft mounting side. It was said to be a hollow cylindrical body.

C. Problems to be Solved by the Invention For this reason, there was a problem in that when suctioning the fluid to be delivered, the fluid entered the hollow cylindrical body of the rotor, causing a decrease in the suction pressure of the pump, resulting in poor suction performance.

The present invention aims to solve the above problems and provide a vane pump with high suction performance.

D. Means for Solving the Problems In order to achieve the above object, the present invention provides the rotor 13
The pump body 10 is composed of a pump body 10 that has a built-in pump, and a drive unit 20 that rotates the rotor 13 through a rotating shaft 21. A rotor 13 fixed to one end of a cantilever rotating shaft 21 having a horizontal axis is rotatably disposed within a liner 12 fitted to the inner surface of the casing 11. , the rotor 1
3 is provided with vane grooves 131a that are perpendicular to each other on the axis, and the vanes 14 are installed in these grooves so as to be slidable along the radial direction of the rotor in combination with each other in an orthogonal posture, and the inner flow path 30 of the liner 12
The area on the outer periphery of the rotor 13 from the fluid inlet 15 to the fluid outlet 16 is set to have the same cross-sectional area, and the liner 12 is made of stainless steel, and the vane 14 is in sliding contact with the liner 12. A portion of the rotor 13 is covered with a stellite layer, and the rotor 13 is concentric with a rotating shaft 21 driven by a motor, and the vanes 14 are connected to the rotating shaft 21.
A short cylindrical main body 131 that slides and guides along the radial direction of the main body 131, and a short cylindrical receiving part 132 that is concentrically formed integrally with the rotating shaft side of the main body 131 with a diameter reduced through a step. The rotor 13 is made up of a solid body having a short cylindrical shaft mounting part 133 which is concentrically formed and whose diameter is reduced through a stage on the rotating shaft side, and the rotor 13 has a rotating A mounting hole 133a concentric with the shaft 21 and a keyway 133b formed on the inner surface of the mounting hole are provided,
The receiving portion 132 is provided with a bolt hole 132a that is concentric with the rotating shaft 21, passes through the bottom wall of the mounting hole 133a, and is enlarged in diameter toward the side opposite to the rotating shaft. Mounting hole 1 of shaft mounting part 133
The tip of the rotating shaft 21 is fitted and keyed into 33a, and a bolt 3 having a wrench hole in its head is inserted into the rotor-side end surface of the rotating shaft 21 through the intersection of the vane grooves 131a to connect the counter-rotating shaft. It is inserted from the side and its head is inserted into the bolt hole 13 of the receiving part 132.
The rotating shaft 21 is screwed into the large diameter part of 2a in a recessed state.
and the rotor 13 are fixed to prevent rotation, the casing 11 is assembled and fixed to the housing 22, and the housing 22 is further fixed to the bracket 2.
The rotary shaft 21 is supported by a bracket 23 at two locations spaced apart by bearings 24, and the gap with the housing 22 is such that the small diameter portion faces the rotor side. Positioned Netsukubutsuyu 225, Grand Packing 26
This vane pump is characterized in that it is sealed using a packing foot 28.

E Effect Rotation is applied to the rotor 13 as the rotating shaft 21 is driven. The rotor 13 has a rotating shaft 21
The mounting hole 133a of the shaft mounting part 133 is inserted into the tip of the shaft mounting part 133 and the key is secured, and the bolt 3 is recessed into the bolt hole 132a of the receiving part 132 and counter-rotated with respect to the rotor side end surface of the rotating shaft 21. Since the rotor 13 and the rotating shaft 21 are screwed together from the shaft side, the rotor 13 and the rotating shaft 21 are easily and reliably fixed to each other. Said bolt 3
There is no impact on the sliding movement of the vane 14.

As the rotor 13 rotates, the vanes 14 attached to the main body 131 rotate while sliding in the rotor radial direction with both end surfaces along the rotor radial direction slidingly in contact with the inner circumferential surface of the casing inner liner 12, The fluid to be sent is introduced through the suction port 15, pressure is applied to the fluid, and the fluid is sent out through the discharge port 16.

Since the gap between the housing 22 and the rotating shaft 21 is sealed using the neck bushing 225, the gland packing 26, and the packing presser 28, the fluid to be sent will not flow out to the motor side through the rotating shaft 21.

F. Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, the vane pump of the present invention roughly consists of a pump body 10 containing a rotor 13, and a drive section 20 that applies rotation to the rotor 13 via a rotation shaft 21.

1 and 2, the pump body 10 is integrally formed with a casing 11 having an upward fluid inlet 15 and a horizontal fluid outlet 16 on the bracket 1, and a liner 12 is disposed within the casing. A flow path 30 for the fluid to be delivered is formed on the inner surface of the liner. In the flow path 30, a rotor 13 having a horizontal axis is provided with a portion (1/4 circumferential area) close to the liner 12. In this 1/4 circumference area,
Flow path surface 31 that is the inner peripheral surface of the rotor 13 and liner 12
are coaxial and set to arcs with different radii.

The liner 12 is made of stainless steel and is separate from the casing 11, and is fitted into the casing 11 and fixed with a key (not shown) or the like.

The rotor 13 includes a short cylindrical main body 131 disposed in the flow path 30, and a short cylindrical receiving part that is integrally formed with a concentrically reduced diameter through stages concentrically toward the rotating shaft side of the main body. 132 and shaft mounting part 13
3. The main body 131 is connected to the rotating shaft 21
The end face on the opposite side is a conical surface 1 whose center is the axis of rotation.
31b. The conical surface meets the vertical plane and has an angle of 0.4°
(0.2° to 0.4°). The main body 131 has two vane grooves 131a perpendicular to each other at its axis.
131a are provided, and the vanes 14 are mounted in these vane grooves in a muntin-like combination in an orthogonal posture, respectively. Both vanes are made of stainless steel and are slidable relative to each other along the radial direction of the rotor, and at least their ends along the sliding direction are coated with a stellite layer. A mounting hole 133a concentric with the rotating shaft 21 is provided at the end of the shaft mounting portion 133 on the rotating shaft side, and a key groove 133b along the shaft is provided on the inner surface of the hole. Also,
The receiving portion 132 is provided with a bolt hole 132a that is concentric with the rotating shaft 21, passes through the bottom wall of the mounting hole 133a, and has a large diameter portion on the side opposite to the rotating shaft via a step.

The rotor 13 and the rotating shaft 21 are keyed, but a rotor fixing bolt 3 having a wrench hole in the head is inserted into the end face of the shaft 21 from the side opposite to the rotating shaft through the bolt hole 132a, and the rotor fixing bolt 3 is inserted into the end face of the shaft 21 from the side opposite to the rotating shaft. The rotor 13 and the rotation shaft 21 are screwed together in a posture recessed into the large diameter portion, thereby fixing the rotor 13 and the rotating shaft 21.

Next, on the outer periphery of the rotor 13, on both sides of the coaxial section between the rotor and the liner inner circumferential surface 31,
In the four circumferential areas, towards each of these areas,
A fluid inlet 15 and an outflow outlet 16 are open. Then, the remaining 1/4 circumferential area, that is, the symmetrical area across the rotor axis with respect to the coaxial area, is removed from the fluid intake port 15 along the rotational direction R of the rotor 13, and is located at the fluid discharge port. The area up to 16 is also considered to be a coaxial area, but in this area, the radius of the flow path surface 31 is defined to be larger than that of the coaxial area,
The interval between the flow path surface and the rotor 13 forms a flow path 30 having the same cross-sectional area.

In the drive unit 20, the mounting hole 13 of the rotor 13
The tip of the rotary shaft 21 is fitted into the rotor 3a, and the rotor 13 and the rotary shaft 21 are fixed to prevent rotation by the key 6 and the rotor fixing bolt 3. The casing 11 is connected to the housing 2 via the housing bolt 4.
2 and the housing 22 is fixed to a bracket 23 via a bracket bolt 5. The rotating shaft 21 is mounted on a bearing 24 with respect to a bracket 23.
and is sealed by a neck bushing 25 and a gland packing 26. Further, the receiving portion 132 is supported via a Teflon bushing 27 mounted on the inner peripheral surface of the housing 22. The rotating shaft 21 is driven by a motor (not shown) via a speed reducer or the like. In addition, in Figure 1,
28 is a packing presser, and 29 is a bearing cover.

When the vane pump described above is started and the rotor 13 rotates, the two vanes 14, 14 slide in the rotor radial direction within the respective vane grooves 131a, 131a, and touch the inner peripheral surface of the casing inner liner 12 on both end surfaces. The fluid is rotated in contact with the flow path 30 to apply pressure to the fluid to be delivered, and is delivered through the fluid discharge port 16. During this operation, the fluid inlet 15
Since the flow path in the area immediately before the fluid exits and reaches the fluid suction port 16 is formed with the same cross-sectional area, a constant compressive force is continuously applied to the fluid, which prevents the fluid being delivered from pulsating or being damaged. I never receive it.

According to the present invention, both the liner 12 and the vane 14 are made of stainless steel, and the vane 14 is
At least the part of the liner 12 that is in contact with it is coated with a stellite layer, thereby preventing both of them from being worn out. Further, since the receiving portion 131 of the rotor 13 is supported by the housing via the Teflon bushing 27, seizure of this portion, which is most heavily loaded during rotation, is prevented. Moreover, since the rotor 14 is tapered so that the end surface opposite to the rotating shaft 21 becomes a conical surface centered on the rotating axis, the rotor 14 does not vibrate and come into contact with the inner surface of the casing.

G. Effect of the invention As described above, in the present invention, the flow path in the liner is set to have the same cross-sectional area from the fluid intake port to the fluid discharge port on the outer periphery of the rotor, so that it is covered with no pulsation. It can be expected to transport fluid. The liner is made of stainless steel, and the contact area of the vane that comes into contact with the liner is covered with a stellite layer, so abrasion powder is generated between the two, which may get mixed into the fluid being fed or cause seizure between the two. Never.

The diameter of the rotating shaft and rotor is reduced through steps, and the rotor consists of a short cylindrical main body, a receiving part, and a shaft mounting part that are integrally formed concentrically, and the shaft mounting part is keyed to the rotating shaft. At the same time, since the bolt is screwed into the mounting hole provided in the receiving part from the side opposite to the rotating shaft to prevent it from coming out, it is securely fixed to prevent rotation. Further, the bolts do not obstruct sliding movement of the vanes.

Since the gap between the casing and the rotating shaft is sealed using a neck bushing, gland packing, and packing presser, flow of fluid to be sent to the motor side can be reliably prevented.

In addition, according to the present invention, the rotor is made into a solid short cylinder body, eliminating the need for a cavity as in the past, which eliminates the possibility of fluid entering the rotor and lowering the suction vacuum of the pump. Ta. Furthermore, the rotor is fixed to the rotating shaft with a bolt that has a wrench hole at the head and is inserted from the side opposite to the rotating shaft and screwed together, so unlike conventional methods, a large wrench that passes through the rotor in the axial direction There is no need to create a hole, and the vane groove can be used, resulting in an even stronger suction vacuum and improved pump suction performance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is a left side view with the cover removed. 1...Bracket, 2...Ground bolt, 3
... Rotor fixing bolt, 4 ... Housing bolt, 5 ... Bracket bolt, 10 ... Pump body, 11 ... Casing, 12 ... Liner, 13
... Rotor, 131 ... Main body, 131a ... Vane groove, 131b ... Conical surface, 132 ... Receiving part, 1
32a... Bolt hole, 133... Shaft mounting part, 13
3a...Mounting hole, 133b...Keyway, 14...
Vane, 15...Fluid intake port, 16...Fluid discharge port, 20...Drive unit, 21...Rotating shaft, 22...
Housing, 23...Bracket, 24...Bearing, 25...Neck bushing, 26...Gland packing, 27...Teflon bushing, 28...
...Packing foot, 29...Bearing cover, 30...
...Channel, 31...Channel surface.

Claims (1)

[Claims for Utility Model Registration] Consisting of a pump body 10 containing a rotor 13, and a drive unit 20 that applies rotation to the rotor 13 via a rotating shaft 21, the pump body 10 is configured to pump upwardly directed fluid onto the bracket 1. A casing 11 having an inlet 15 and a horizontal fluid outlet 16 is integrally formed, and a rotor 13 fixed to one end of a cantilever rotating shaft 21 having a horizontal axis is fitted into the inner surface of the casing 11. Rotatably disposed within the liner 12, the rotor 1
3 is provided with vane grooves 131a that are perpendicular to each other on the axis, and the vanes 14 are installed in these grooves so as to be slidable along the radial direction of the rotor in combination with each other in an orthogonal posture, and the inner flow path 30 of the liner 12
The area on the outer periphery of the rotor 13 from the fluid inlet 15 to the fluid outlet 16 is set to have the same cross-sectional area, and the liner 12 is made of stainless steel, and the vane 14 is in sliding contact with the liner 12. A portion of the rotor 13 is covered with a stellite layer, and the rotor 13 is concentric with a rotating shaft 21 driven by a motor, and the vanes 14 are connected to the rotating shaft 21.
A short cylindrical main body 131 that slides and guides along the radial direction of the main body 131, and a short cylindrical receiving part 132 that is concentrically formed integrally with the rotating shaft side of the main body 131 with a diameter reduced through a step. The rotor 13 is made up of a solid body having a short cylindrical shaft mounting part 133 which is concentrically formed and whose diameter is reduced through a stage on the rotating shaft side, and the rotor 13 has a rotating A mounting hole 133a concentric with the shaft 21 and a keyway 133b formed on the inner surface of the mounting hole are provided,
The receiving portion 132 is provided with a bolt hole 132a that is concentric with the rotating shaft 21, passes through the bottom wall of the mounting hole 133a, and is enlarged in diameter toward the side opposite to the rotating shaft. Mounting hole 1 of shaft mounting part 133
The tip of the rotating shaft 21 is fitted and keyed into 33a, and a bolt 3 having a wrench hole in its head is inserted into the rotor-side end surface of the rotating shaft 21 through the intersection of the vane grooves 131a to connect the counter-rotating shaft. It is inserted from the side and its head is inserted into the bolt hole 13 of the receiving part 132.
The rotating shaft 21 is screwed into the large diameter part of 2a in a recessed state.
and the rotor 13 are fixed to prevent rotation, the casing 11 is assembled and fixed to the housing 22, and the housing 22 is further fixed to the bracket 2.
The rotary shaft 21 is supported by a bracket 23 at two locations spaced apart by bearings 24, and the gap with the housing 22 is such that the small diameter portion faces the rotor side. Positioned Netsukubutsuyu 225, Grand Packing 26
and a vane pump sealed using a packing foot 28.