CN212690327U

CN212690327U - Rotor pump

Info

Publication number: CN212690327U
Application number: CN202021331510.4U
Authority: CN
Inventors: 姚蓉平
Original assignee: Lafa Pump Technology Ningbo Co ltd
Current assignee: Lafa Pump Technology Ningbo Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-03-12
Anticipated expiration: 2030-07-08

Abstract

The utility model provides a rotor pump belongs to rotor pump technical field, include: a gear case; the pump body is connected with the gear box, a working cavity and a mounting plate are arranged on the pump body, a mounting hole is formed in the mounting plate, and the mounting hole is communicated with the working cavity; the rotating shaft comprises a connecting shaft body and a short shaft body, the short shaft body and the connecting shaft body are integrally connected, the connecting shaft body is arranged in the gear box, and the short shaft body penetrates into the pump body; mechanical seal subassembly sets up in the mounting hole, and mechanical seal subassembly includes rotating ring and quiet ring, and the rotating ring overlaps to be established on the short axis body and the rotating ring with the short axis body linkage is connected, and quiet ring cover is established on the short axis body and quiet ring and short axis body keep relative static, and the rotating ring is contradicted with quiet ring and is connected. The utility model has the advantages that: the length of the shaft body can be reduced, so that the part of the shaft body coming out of the gear box is shorter, the risk of deformation and bending of the rotating shaft is effectively reduced, and the service life of the rotor pump is prolonged.

Description

Rotor pump

Technical Field

The utility model belongs to the technical field of the impeller pump, a impeller pump is related to.

Background

A gerotor pump is one form of a positive displacement pump. It is composed of rotary rotor and stationary pump body, it has no suction and discharge valves, and utilizes the relative movement between rotor and pump body to change working volume, and utilizes the extrusion action of rotary rotor to discharge liquid, at the same time, it leaves a space on another side to form low pressure so as to make the liquid continuously suck.

For example, a chinese patent with application number 201610645524.5 discloses a novel cam rotor pump, which is characterized by comprising a cam (3), a stator (2) arranged in the center of the cam (3), an input port (4) and an output port (5) respectively located at two ends of the rotor pump, and a base (1) tightly supporting the cam (3).

However, when the rotor pump is used, the rotor pump is generally used for conveying a high-viscosity medium, which means that a rotating shaft of the rotor pump can bear a relatively large pressure when rotating, while a rotating shaft of the existing rotor pump has a relatively long length, which is well known that the relatively long shaft is generally easy to deform, and particularly in the rotor pump, the rotating shaft with the long length is easy to bend and deform in a high-viscosity medium environment, so that the existing rotor pump has a relatively short service life, and has a certain improvement space.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a rotor pump.

The purpose of the utility model can be realized by the following technical proposal: a rotodynamic pump comprising:

a gear case;

the gear box is connected with the gear box, a working cavity and a mounting plate are arranged on the gear box, a mounting hole is formed in the mounting plate, and the mounting hole is communicated with the working cavity;

the rotating shaft comprises a connecting shaft body and a short shaft body, the short shaft body is integrally connected with the connecting shaft body, the connecting shaft body is arranged in the gear box, and the short shaft body penetrates into the pump body;

mechanical seal subassembly, it sets up in the mounting hole, mechanical seal subassembly includes rotating ring and quiet ring, the rotating ring overlaps to be established on the short axis body just the rotating ring with minor axis body linkage connection, quiet ring cover is established on the short axis body just quiet ring with the minor axis body keeps relative stillness, the rotating ring with quiet ring is contradicted and is connected.

Preferably, a first matching surface is arranged on the gear box, a second matching surface is arranged on the pump body, the first matching surface and the second matching surface are both of a stepped surface structure, a groove portion is formed on the first matching surface, a protruding block portion is formed on the second matching surface, the first matching surface is attached to the second matching surface, and the protruding block portion is inserted into the groove portion.

Preferably, the mechanical seal subassembly still includes the gland, thereby the gland with the mounting panel is connected will the rotating ring with quiet ring restriction is in the mounting hole, the mounting hole is the shoulder hole structure, the rotating ring sets up just keep axial fixity in the mounting hole, thereby quiet ring with the gland is contradicted and is connected the messenger quiet ring with the rotating ring is contradicted and is connected.

Preferably, an annular installation cavity is formed between the stationary ring and the gland, a compensation sealing ring is arranged in the annular installation cavity, the compensation sealing ring is in abutting connection with the stationary ring and the gland, and the compensation sealing ring is used for sealing the annular installation cavity and pushing the stationary ring to the movable ring.

Preferably, the gland is provided with a plurality of spring grooves, compensation springs are arranged in the spring grooves, and the compensation springs are in abutting connection with the static ring so as to push the static ring to the movable ring.

Preferably, the edge of the mounting plate is provided with a connecting portion, the connecting portion is integrally connected with the pump body, and the mounting plate extends towards the direction of the convex block portion through the connecting portion.

Preferably, an adjusting washer is arranged on the short shaft body, and the movable ring is sleeved on the adjusting washer so as to be in linkage connection with the short shaft body.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the length of the shaft body can be reduced, so that the part of the shaft body coming out of the gear box is shorter, the risk of deformation and bending of the rotating shaft is effectively reduced, and the service life of the rotor pump is prolonged.

2. The first matching surface and the second matching surface are both in a stepped surface structure, so that a concave groove part can be formed on the first matching surface, and a convex block part can be formed on the second matching surface, so that the mounting plate can be close to the gear box as much as possible when the first matching surface and the second matching surface are assembled together, and the distance between the mounting plate and the gear box is reduced, so that the short shaft body can penetrate into the pump body with short length.

3. In practical structure, the medium in the working chamber pushes the movable ring, so that the movable ring has pressure towards the static ring, and the static ring keeps sealing with the static ring during working through the compensation sealing ring or compensation force towards the movable ring.

Drawings

Fig. 1 is an exploded view of the rotor pump of the present invention.

Fig. 2 is a schematic structural diagram of the pump body and the gear box of the present invention.

Fig. 3 is a schematic structural diagram of the rotor pump of the present invention.

Fig. 4 is a schematic sectional view of the rotor pump of the present invention.

In the figure, 100, a gearbox; 110. a first mating surface; 111. a groove part; 200. a pump body; 210. a working chamber; 220. mounting a plate; 230. a connecting portion; 240. mounting holes; 250. A second mating surface; 251. a bump portion; 300. a rotating shaft; 310. a connecting shaft body; 320. A short shaft body; 330. an adjusting washer; 410. a moving ring; 420. a stationary ring; 421. an annular mounting cavity; 430. a gland; 431. a spring slot; 432. a compensation spring; 440. and (5) compensating a sealing ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, and 4, a rotary pump includes: the gear box 100, the pump body 200, the rotating shaft 300 and the mechanical seal assembly skillfully shorten the length of the rotating shaft 300 extending out of the gear box 100 by improving the installation position and the installation mode of the mechanical seal assembly, so that the working part of the rotating shaft 300 is shorter and is not easy to bend and deform when bearing larger pressure.

It should be noted here that, in the conventional rotor pump, since the transition space between the pump body and the gear box is relatively long, that is, the distance between the mounting plate and the front end cover of the gear box is relatively large, the length of the shaft body is relatively long, and the rotor pump is generally used for conveying a high viscosity medium, the shaft body is subjected to a large radial pressure, so that the shaft body is easily bent and deformed, and it is known that the shaft body is easily deformed as the shaft body is longer, so that shortening the shaft body 320 is one of the best ways to prevent bending and deformation.

The gear box 100 is a housing structure, a bearing for supporting the rotating shaft 300 is disposed on a front end surface of the gear box 100, and a front end cover covers the front end surface of the gear box 100.

The pump body 200 is connected to the gearbox 100, and the pump body 200 is provided with a working cavity 210 and a mounting plate 220, preferably, the mounting plate 220 of the pump body 200 faces a front end cover on the gearbox 100, the working cavity 210 is used for accommodating a rotor, the mounting plate 220 is of a rear panel structure, and in a practical structure, the rotating shaft 300 penetrates through a bearing on the gearbox 100, penetrates through the front end cover, then penetrates through the mounting plate 220 and enters into the working cavity 210.

The mounting plate 220 is provided with a mounting hole 240, and the mounting hole 240 is communicated with the working cavity 210; the mounting hole 240 is actually the mounting seat for the mechanical seal assembly, which enables the mechanical seal assembly to be directly mounted on the mounting plate 220, and thus the shorter shaft 300 to pass from the gear box 100 into the working chamber 210.

The rotating shaft 300 comprises a connecting shaft body 310 and a short shaft body 320, the short shaft body 320 is integrally connected with the connecting shaft body 310, the connecting shaft body 310 is arranged in the gear box 100, and the short shaft body 320 penetrates through the pump body 200.

Preferably, the connecting shaft body 310 and the short shaft body 320 are actually part of the rotating shaft 300, wherein the connecting shaft body 310 is located inside the gear box 100, the short shaft body 320 is extended out of the gear box 100, and the short shaft body 320 is not easily bent and deformed due to its short length.

The mechanical seal assembly is arranged in the mounting hole 240, preferably, the mechanical seal assembly can be accommodated in the mounting hole 240, so that the mechanical seal assembly is directly arranged on the mounting plate 220, when the pump body 200 is assembled with the gear box 100, the short shaft body 320 directly penetrates through the mechanical seal assembly, the length between the pump body 200 corresponding to the short shaft body 320 and the front end cover of the gear box 100 can be shortened, and the original long shaft body can extend into the pump body 200 to be changed into the pump body 200 which only needs the short shaft body to be deep into the pump body 200.

The mechanical seal assembly comprises a movable ring 410 and a stationary ring 420, the movable ring 410 is sleeved on the short shaft body 320 and the movable ring 410 is in linkage connection with the short shaft body 320, the stationary ring 420 is sleeved on the short shaft body 320 and the stationary ring 420 is kept relatively stationary with the short shaft body 320, and the movable ring 410 is in abutting connection with the stationary ring 420.

Preferably, the rotor pump needs to be mechanically sealed, so that the medium in the working chamber 210 cannot leak out through the pump body 200, and the mechanical seal usually occupies a certain shaft length, so that the mechanical seal assembly is directly installed in the installation hole 240, so that the moving ring 410 and the stationary ring 420 can be shaft-sealed in the installation hole 240, thereby shortening the length of the required shaft body, and allowing the short shaft body 320 to enter the pump body 200 for working.

Preferably, the movable ring 410 is close to the pump body 200, the stationary ring 420 is close to the gearbox 100, and both the movable ring 410 and the stationary ring 420 are sleeved on the short shaft body 320, the movable ring 410 and the short shaft body 320 rotate synchronously, and the stationary ring 420 is kept stationary.

Through foretell connection structure and position relation, can reduce the length of axis body for the part that the axis body came out from gear box 100 is shorter, and the effectual risk that has reduced pivot 300 and warp the bending, thereby improves the life of impeller pump.

As shown in fig. 1 and 2, in addition to the above embodiment, the gear box 100 has the first mating surface 110, and the pump body 200 has the second mating surface 250, preferably, the assembly structure of the gear box 100 and the pump body 200 also affects the length of the stub shaft body 320, and specifically, when the gear box 100 and the pump body 200 are assembled, the first mating surface 110 and the second mating surface 250 need to be attached together and then fixed.

The first mating surface 110 and the second mating surface 250 are both stepped surface structures, that is, the first mating surface 110 and the second mating surface 250 are uneven end surfaces, and the first mating surface 110 and the second mating surface 250 are complementary to each other, so that the two mating surfaces can be attached together.

It should be noted that, in the prior art, the front end face of the gear box 100 and the rear end face of the pump body 200 are both planar structures, and such structures need to be adapted to a relatively long shaft body, that is, the length of the shaft body increases, so that the shaft body is easy to bend, and in the present embodiment, the first mating surface 110 and the second mating surface 250 are specially configured to be stepped, so that after assembly, the mounting portion can be close to the front end cover of the gear box 100, so as to reduce the length occupied by the shaft body.

The first mating surface 110 is formed with a groove portion 111, the second mating surface 250 is formed with a protrusion portion 251, the first mating surface 110 is attached to the second mating surface 250, and the protrusion portion 251 is inserted into the groove portion 111.

Preferably, since the first mating surface 110 and the second mating surface 250 are both of a stepped surface structure, the first mating surface 110 is formed with a recessed groove portion 111, and the second mating surface 250 is formed with a protruding portion 251, when the first mating surface 110 and the second mating surface 250 are assembled together, the protruding portion 251 is inserted into the groove portion 111, so that the mounting plate 220 can be as close to the gear box 100 as possible, thereby reducing the distance between the two, and enabling the short shaft body 320 to penetrate into the pump body 200 with a short length.

It should be noted here that, by disposing the mechanical seal assembly in the mounting hole 240 and then disposing the first mating surface 110 and the second mating surface 250 in a complementary stepped surface structure, the distance between the mounting plate 220 and the gearbox 100 is shortened, and the space occupied by the mechanical seal assembly is reduced, the length of the shaft can be greatly shortened by the two designs, in the actual rotor pump, the length of the rotating shaft 300 can be reduced by at least 30 centimeters, and the defect that the rotating shaft 300 is easily deformed and bent is greatly improved.

As shown in fig. 1, 2, 3, and 4, based on the above embodiment, the mechanical seal assembly further includes a gland 430, the gland 430 is connected to the mounting plate 220 to confine the rotating ring 410 and the stationary ring 420 in the mounting hole 240, the mounting hole 240 has a stepped hole structure, the rotating ring 410 is disposed in the mounting hole 240 and is axially fixed, and the stationary ring 420 is in interference connection with the gland 430 to enable the stationary ring 420 to be in interference connection with the rotating ring 410.

Preferably, the pressing cover 430 is of an annular structure and abuts against the mounting plate 220, the pressing cover 430 corresponds to the mounting hole 240, and the movable ring 410 and the stationary ring 420 can be held in the mounting hole 240 by the pressing cover 430, so that the mechanical seal assembly is fixed on the pump body 200.

In an actual structure, the mounting hole 240 is a stepped hole structure, and the moving ring 410 can be fixed at the hole body at the rear end, so that the moving ring 410 can rotate along with the short shaft body 320 in the mounting hole 240, but the moving ring 410 cannot axially pass through the mounting hole 240 as a whole, and in the actual structure, the front end of the moving ring 410 passes through the mounting hole 240 and is provided with an O-shaped sealing ring between the moving ring and the rotor in the working chamber 210, while the stationary ring 420 is pressed by the pressing cover 430, so that the moving ring 410 and the stationary ring 420 can be abutted together, and the sealing performance during shaft sealing is ensured.

It should be noted that the short shaft body 320 passes through the front end cover of the gearbox 100, the gland 430, the stationary ring 420 and the moving ring 410 in sequence, then passes through the mounting hole 240, and finally passes through the working chamber 210.

As shown in fig. 1, 2, 3, and 4, in addition to the above embodiments, an annular mounting cavity 421 is formed between the stationary ring 420 and the gland 430, a compensating seal 440 is disposed in the annular mounting cavity 421, the compensating seal 440 is in interference connection with the stationary ring 420 and the gland 430, and the compensating seal 440 is used for sealing the annular mounting cavity 421 and pushing the stationary ring 420 toward the movable ring 410.

Preferably, the movable ring 410 and the stationary ring 420 need to be closely contacted, so that pressure compensation needs to be performed through the stationary ring 420, so that the stationary ring 420 can press the movable ring 410 by compensating the axial elastic force generated by the sealing ring 440, and the sealing performance of the fit between the movable ring 410 and the stationary ring is ensured.

Specifically, the stationary ring 420 is sleeved with an annular compensating seal ring 440, the gland 430 presses the compensating seal ring 440, the compensating seal ring 440 is compressed, and meanwhile, the elastic force generated by the compensating seal ring 440 is used as a compensating force for pressing the stationary ring 420 against the movable ring 410, and the compensating seal ring 440 can also play a role in sealing a gap between the gland 430 and the stationary ring 420.

It should also be noted here that in practical configurations, the medium in the working chamber 210 will push the moving ring 410 such that the moving ring 410 has a pressure towards the stationary ring 420, and the stationary ring 420 maintains the seal between the moving ring 410 and the stationary ring 420 by compensating the sealing ring 440 or the compensating force towards the moving ring 410 during operation.

As shown in fig. 3, on the basis of the above embodiment, a plurality of spring grooves 431 are formed in the gland 430, and a compensating spring 432 is disposed in the spring groove 431, and the compensating spring 432 is in interference connection with the stationary ring 420 so as to push the stationary ring 420 toward the moving ring 410.

Preferably, the gland 430 is provided with a plurality of spring grooves 431 in the circumferential direction, and the stationary ring 420 is pressed against by the springs, so that the stationary ring 420 can press the movable ring 410 by the elastic force, and the movable ring and the stationary ring can be tightly pressed together.

It should be noted here that in some cases, when the compensation seal 440 is not suitable for the stationary ring 420, the compensation spring 432 may be used as a compensation element, for example, in some environments with relatively high corrosive media, the compensation spring 432 is directly used to push the stationary ring 420 to the moving ring 410.

As shown in fig. 1, 2, and 4, in the above embodiment, a connection portion 230 is provided at an edge of the mounting plate 220, the connection portion 230 is integrally connected to the pump body 200, and the mounting plate 220 extends in the direction of the projection portion 251 through the connection portion 230.

Preferably, the mounting plate 220 is an important component, the shorter the distance from the gear box 100 is, the shorter the length of the rotating shaft 300 is, and the vertical connecting portion 230 is provided at the edge of the mounting plate 220, so that the mounting plate 220 can be as close to the position of the bump portion 251 as possible, thereby shortening the distance between the mounting plate 220 and the front end cover of the gear box 100, so that the short shaft body 320 can penetrate through the mounting plate 220 into the working cavity 210 only by a short distance when penetrating out of the gear box 100.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiments, an adjusting washer 330 is disposed on the short shaft body 320, and the rotating ring 410 is sleeved on the adjusting washer 330 and is linked with the short shaft body 320.

Preferably, the short shaft body 320 is actually a stepped shaft structure, in which the stationary ring 420 is sleeved on the shaft body with a larger diameter, and the moving ring 410 is sleeved on the shaft body with a smaller diameter, so that the adjusting washer 330 is required to compensate for the diameter, so that the moving ring 410 can be sleeved on the short shaft body 320 through the adjusting washer 330.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A rotary pump, comprising:

a gear case;

2. A rotary pump according to claim 1, wherein: the gear box is provided with a first matching surface, the pump body is provided with a second matching surface, the first matching surface and the second matching surface are of a step surface structure, a groove portion is formed in the first matching surface, a protruding block portion is formed in the second matching surface, the first matching surface and the second matching surface are attached, and the protruding block portion is inserted into the groove portion.

3. A rotary pump according to claim 1, wherein: the mechanical seal subassembly still includes the gland, thereby the gland with thereby the mounting panel is connected will the rotating ring with quiet ring restriction is in the mounting hole, the mounting hole is the shoulder hole structure, the rotating ring sets up just keep axial fixity in the mounting hole, quiet ring with thereby the gland is contradicted and is connected the messenger quiet ring with the rotating ring is contradicted and is connected.

4. A rotary pump according to claim 3, wherein: the static ring with be formed with annular installation cavity between the gland, be provided with the compensation sealing washer in the annular installation cavity, the compensation sealing washer with static ring and the gland is contradicted and is connected, and the compensation sealing washer is used for sealing up annular installation cavity and will static ring is pushed to the rotating ring.

5. A rotary pump according to claim 3, wherein: the pressure cover is provided with a plurality of spring grooves, compensation springs are arranged in the spring grooves, and the compensation springs are in abutting connection with the static ring so as to push the static ring to the movable ring.

6. A rotary pump according to claim 2, wherein: the edge of mounting panel is provided with connecting portion, connecting portion with pump body coupling, the mounting panel passes through connecting portion to lug portion direction extends.

7. A rotary pump according to claim 3, wherein: the short shaft body is provided with an adjusting washer, and the movable ring is sleeved on the adjusting washer so as to be in linkage connection with the short shaft body.