JPH0442546Y2 - - 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 were attached along the radial direction of the rotary shaft and were perpendicular to each other at the axis so as to be slidable in the radial direction of the rotating shaft.

C. Problems to be Solved by the Invention According to the conventional pump described above, as the rotor rotates, vibration occurs in the rotor, and the end surface of the rotor on the opposite side to the rotating shaft comes into contact with the inner surface of the casing, causing friction. There was a risk that wear debris would get mixed into the fluid being sent. This tendency is particularly strong when the fluid to be transported has a high viscosity and is a tangible object, and when the fluid to be transported is food, it is a serious problem from a sanitary standpoint.

An object of the present invention is to solve the above problems and provide a vane pump in which the rotor does not come into contact with the inner surface of the casing even if the rotor oscillates to some extent.

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 body, 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 13 is provided with vane grooves 131a that are perpendicular to each other at the axis, and vanes 14 are installed in these grooves so as to be slidable along the rotor radial direction, and the inner flow path 30 of the liner 12 is 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, the liner 12 is made of stainless steel, and the contact portion of the vane 14 in sliding contact with the liner 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.
1, a short cylindrical 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 and integrally formed with a diameter reduced through a step on the rotation axis side of the main body 131. , and further has a short cylindrical shaft attachment part 133 concentrically formed with a reduced diameter via a step on the rotation axis side, and the main body 131 has an end face opposite to the rotation axis centered on the rotation axis. , a conical surface 131b having an inclination of 0.2° to 0.4° with respect to the vertical plane, and the shaft mounting portion 133
A mounting hole 133a concentric with the rotating shaft 21 and a key groove 133b formed on the inner surface of the mounting hole are provided in the receiving portion 132, and a key groove 133b is provided concentrically with the rotating shaft 21 and penetrating the bottom wall of the mounting hole 133a. A stepped bolt hole 132a whose diameter is enlarged toward the side opposite to the rotating shaft is provided, and the drive section 20 is attached to the mounting hole 1 of the shaft mounting section 133.
The tip of the rotating shaft 21 is fitted and keyed into 33a, and the bolt 3 having a wrench hole in its head is inserted into the bolt hole 132a of the receiving part 132 against the end surface of the rotating shaft 21 on the rotor side. The rotating shaft 21 and the rotor 13 are screwed together in a recessed state, and the rotating shaft 21 and the rotor 13 are fixed in a non-rotating manner.
3, and the rotating shaft 21 is fixed to the bracket 23.
The vane pump is supported by a bearing 24, and the gap with the housing 22 is sealed using a neck bushing 25, a gland packing 26, and a packing presser 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 bolt 3 is screwed in from the opposite side of the rotating shaft to prevent rotation.

As the rotor 13 rotates, the vanes 14 mounted perpendicularly to the axis of the main body 131 move both end surfaces along the radial direction of the rotor to the inner casing liner 12.
It rotates while sliding in the radial direction of the rotor in sliding contact with the inner circumferential surface of the rotor, introduces the fluid to be delivered through the suction port 15, applies pressure to the fluid, and sends it out through the discharge port 16. Since the end surface of the main body 131 on the side opposite to the rotational axis is a conical surface inclined at an angle of 0.2° to 0.4° with respect to the rotational axis, the rotor 13 and the inner surface of the casing 11 come into contact and abrasion powder is generated. Powder is prevented from contaminating the delivered fluid.

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 fluid 30 of 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 diameter reduced through steps 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 vanes 14 are mounted in these vane grooves in a muntin-like combination in a perpendicular posture, respectively. Both of these 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 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 keyway 133b along the shaft is provided on the inner surface of the hole. Further, 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 locked together with a key, but a rotor fixing bolt 3 having a head in a wrench hole 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 bush 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 parking 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 there is no pulsation. It can be expected to transport the fluid to be transported.

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 with no rotation. Further, the bolts do not obstruct sliding movement of the vanes.

The vane pump of the present invention is sealed using a neck bushing, gland packing, and packing foot so that the fluid to be delivered does not flow out toward the bearing side along the rotation axis, so the fluid to be delivered is prevented from flowing toward the motor side. It is definitely being carried out.

According to the present invention, the conventional rotor has been improved so that the end surface opposite to the rotation axis is a conical surface centered on the rotation axis, which prevents the rotor from swinging even when a heavy load is applied to the rotor. However, the rotor does not come into contact with the inner surface of the casing, so there is no longer any possibility of abrasion particles being generated and mixed into the fluid to be fed, or that this part will be seize up.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one 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. The rotor 13 is provided with vane grooves 131a that are perpendicular to each other at the axis, and vanes 14 are installed in each of these grooves so as to be slidable along the rotor radial direction. The inner flow path 30 of the liner 12 is set to have the same cross-sectional area in the area from the fluid intake port 15 to the fluid discharge port 16 on the outer periphery of the rotor 13, and the liner 12 is made of stainless steel. The contact portion of the vane 14 that makes sliding contact with the vane 12 is coated with a stellite layer, and the rotor 13 is concentric with a rotating shaft 21 driven by a motor, and the vane 14 is 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. , and further has a short cylindrical shaft attachment part 133 concentrically formed with a reduced diameter via a step on the rotation axis side, and the main body 131 has an end face opposite to the rotation axis centered on the rotation axis. , a conical surface 131b having an inclination of 0.2° to 0.4° with respect to the vertical plane, and the shaft mounting portion 133
A mounting hole 133a concentric with the rotating shaft 21 and a key groove 133b formed on the inner surface of the mounting hole are provided in the receiving part 132, and a key groove 133b is provided concentrically with the rotating shaft 21 and penetrating the bottom wall of the mounting hole 133a. A stepped bolt hole 132a whose diameter is enlarged toward the side opposite to the rotating shaft is provided, and the drive section 20 is attached to the mounting hole 1 of the shaft mounting section 133.
The tip of the rotating shaft 21 is fitted into the rotor side end face of the rotating shaft 21 and locked with a key, and the bolt 3 having a wrench hole in its head is inserted into the bolt hole 132a of the receiving part 132. The rotating shaft 21 and the rotor 13 are screwed together in a recessed state, and the rotating shaft 21 and the rotor 13 are fixed in a fixed manner.
3, and the rotating shaft 21 is fixed to the bracket 23.
A vane pump characterized in that the vane pump is supported by a bearing 24 and a gap between the housing 22 and the housing 22 is sealed using a neck bushing 225, a gland packing 26, and a packing presser 28.