CN212536077U

CN212536077U - Three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump

Info

Publication number: CN212536077U
Application number: CN202020812239.XU
Authority: CN
Inventors: 李玉刚
Original assignee: Cangzhou Yuansentai Machinery Manufacturing Co ltd
Current assignee: Cangzhou Yuansentai Machinery Manufacturing Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-02-12
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump, including the linking bridge of cavity tube-shape, linking bridge outside one end is equipped with first turn-ups, be close to the other end and be equipped with the second turn-ups, the PMSM passes through connecting bolt and is connected with first turn-ups, the pump body passes through the bolt and is connected with the second turn-ups, the output shaft of PMSM stretches into in the linking bridge, the linking bridge inboard is equipped with annular backup pad, the backup pad is close to PMSM one side and is equipped with the support location bearing, the rotation of support location bearing is connected with the connection pump shaft, the output shaft of PMSM pegs graft in connecting pump shaft one end, the other end of connection pump shaft is fixed with; the utility model discloses structure loading and unloading are simple, and the wearing and tearing of sealed department are less, and sealed respond well, centrifugal pump excellent in use effect.

Description

Three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump

Technical Field

The utility model belongs to the technical field of the centrifugal pump, a synchronous pipeline formula centrifugal pump of ternary flow permanent magnetism is related to.

Background

Pipeline formula centrifugal pump is used for carrying the clear water, corrosive liquids or physics, other liquid that chemical property is similar to water, be applicable to industry and urban drainage, high-rise building pressure boost send water, aspects such as fire control pressure boost and remote transport, the centrifugal pump motor rotates with the impeller high speed when carrying liquid, make impeller and the pump body, linking bridge's sealed department wearing and tearing are serious, the impeller is not good with the sealed effect of being connected the pump shaft, the liquid that the centrifugal pump sent probably gets into the result of use that the motor reduced the motor, the life of centrifugal pump shortens, and it is inconvenient that current centrifugal pump loading and unloading.

Disclosure of Invention

The utility model provides a synchronous pipeline formula centrifugal pump of ternary flow permanent magnetism has reduced the wearing and tearing of the sealed department of impeller and the pump body, linking bridge, has improved the sealed effect of ladder seal and has connected pump shaft and seal assembly's sealed effect, and then has improved the result of use and the life of motor and centrifugal pump, makes the loading and unloading of centrifugal pump more convenient.

The utility model adopts the technical proposal that the three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump comprises a hollow cylindrical connecting support, wherein one end of the outer side of the connecting support is provided with a first flanging, the outer side of the connecting support is provided with a second flanging near the other end, a permanent magnet synchronous motor is fixed with the first flanging through a connecting bolt, an output shaft of the permanent magnet synchronous motor extends into the connecting support, and a pump body is fixed with the second flanging bolt; an annular supporting plate is arranged in the connecting support, a supporting and positioning bearing is fixed on one side of the supporting plate close to the permanent magnet synchronous motor, a connecting pump shaft is connected in the supporting and positioning bearing in a rotating mode, one end of the connecting pump shaft is fixedly connected with an output shaft of the permanent magnet synchronous motor in an inserting mode, the other end of the connecting pump shaft penetrates through the supporting plate to be fixed with an impeller, the impeller is arranged in a cavity of a pump body, a shaft sleeve is rotatably sleeved on the outer side of the connecting pump shaft between the supporting plate and the impeller, and a sealing assembly; the impeller is close to backup pad one side and is equipped with the sealing ring, the sealing ring outside is equipped with the ladder with the linking bridge inboard and seals, the sealing ring outside is equipped with two rings of second recesses, the impeller is kept away from backup pad one side and is also equipped with the ladder with pump body inboard and seals, the impeller is kept away from backup pad one side outside and is equipped with two rings of first recesses.

The utility model has the advantages that:

1. a support positioning bearing is arranged between the connecting support and the connecting pump shaft to support the impeller and the pump shaft to rotate under the coaxiality so as to reduce the abrasion of the stepped sealing part, and two grooves are additionally arranged at the stepped sealing parts of the impeller, the pump body and the connecting support respectively, so that a hydraulic water film can be formed when the impeller drives fluid to rotate at high speed, the abrasion of the stepped sealing surface is further reduced, and the using effect of the centrifugal pump is improved; 2. the sealing assembly is arranged on the outer side of a connecting pump shaft between the supporting plate and the impeller, primary sealing is carried out through the fixing ring, the rotating ring is in threaded connection to lock the fixing ring, and the position of the rotating ring is fixed through the spring and the backing ring, so that the fixed ring and the rotating ring are prevented from being separated in the rotating process, the sealing effect is improved, the corrosion of fluid to a motor is reduced, and the service life of the centrifugal pump is prolonged; 3. the mounting positions and gaps of the impeller, the pump body and the connecting support can be adjusted by using the backing ring and the spring, so that the impeller, the pump body and the connecting support are convenient to disassemble; 4. the three-dimensional flow impeller reduces loss, impact and noise of fluid in the pump and improves the using effect of the centrifugal pump.

Drawings

Fig. 1 is an overall structure diagram of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is an enlarged view at B in fig. 1.

Fig. 4 is a structural diagram of the impeller of the present invention.

Fig. 5 is a block diagram of a seal assembly.

In the figure, 1 is a permanent magnet synchronous motor, 2 is a connecting pump shaft, 3 is a connecting support, 4 is an impeller, 4-1 is an impeller blade, 4-2 is a front cover plate, 4-3 is a rear cover plate, 5 is a pump body, 6 is a sealing assembly, 7 is a supporting and positioning bearing, 8 is a connecting bolt, 9 is a first groove, 10 is a step seal, 11 is a second groove, 12 is a fixed ring, 13 is a rotating ring, 14 is a backing ring, and 15 is a spring.

Detailed Description

The present invention will be further described with reference to the following embodiments and the accompanying drawings.

The overall structure of the three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump is shown in figures 1-5 and comprises a hollow cylindrical connecting support 3, wherein a first flanging is arranged at one end of the outer side of the connecting support 3, a second flanging is arranged at the position, close to the other end, of the outer side of the connecting support 3, a permanent magnet synchronous motor 1 is fixed with the first flanging through a connecting bolt 8, an output shaft of the permanent magnet synchronous motor 1 extends into the connecting support 3, and a shell of a pump body 5 is fixed with the second flanging through a bolt; an annular supporting plate is fixed on the inner side of the connecting support 3, a supporting and positioning bearing 7 is fixed on one side of the supporting plate close to the permanent magnet synchronous motor 1, the supporting and positioning bearing 7 is connected with a connecting pump shaft 2 in a rotating mode, an output shaft of the permanent magnet synchronous motor 1 is inserted into one end of the connecting pump shaft 2, the other end of the connecting pump shaft 2 penetrates through the supporting plate and is fixed with the impeller 4, the impeller 4 is arranged in a cavity of the pump body 5, a sealing ring is arranged at one end, close to the supporting plate, of the impeller 4, the outer side of the sealing ring is sealed with the inner side of; the cover is rotated in the connecting pump shaft 2 outside between backup pad and the impeller 4 and is equipped with the axle sleeve, the axle sleeve outside is fixed with seal assembly 6, seal assembly 6 structure is shown in fig. 5, establish solid fixed ring 12 in the axle sleeve outside including fixed cover, rotating ring 13 and backing ring 14, gu fixed ring 12 is close to backup pad one side and is fixed with the bulge loop, be equipped with the recess ring that matches with the bulge loop in the backup pad, the bulge loop stretches into the recess ring internal seal, gu fixed ring 12 keeps away from backup pad one side and is the toper section of thick bamboo, toper section of thick bamboo outside bore reduces along backup pad to impeller 4 direction gradually, toper section of thick bamboo outside threaded connection has rotating ring 13, it is fixed with backing ring 14 that gu fixed ring 12 one side is kept away from to.

The joint of the impeller 4 and the pump body 5 is shown in figure 2, the outer side of the impeller 4 and the pump body 5 are sealed through a two-stage step seal 10, the outer side of the impeller 4 is also provided with two circles of first grooves 9, the joint of the impeller 4 and the connecting support 3 is shown in figure 3, one side of the impeller 4 close to the support plate is provided with a seal ring, the outer side of the seal ring and the inner side of the connecting support 3 are also sealed through the two-stage step seal 10, the outer side of the seal ring is provided with two circles of second grooves 11, when the permanent magnet synchronous motor 1 drives the impeller 4 to rotate in the pump body 5 at a high speed through the connecting pump shaft 2, the support positioning bearing 7 can ensure that the connecting pump shaft 2 cannot deviate, so that the abrasion of the two step seals 10 is small, the step seal between the seal ring and the connecting support 3 can effectively prevent pressure leakage, a layer of hydraulic, the abrasion between the sealing ring and the connecting support 3 and between the impeller 4 and the pump body 5 is reduced, the first groove 9 and the second groove 11 and the stepped sealing surface form complete water film pressure support, the axial force of the water pump is reduced, and the service life of the water pump is prolonged.

The structure of the impeller 4 is shown in figure 4, and comprises a circular front cover plate 4-2 and a circular rear cover plate 4-3, wherein the front cover plate 4-2 and the circular rear cover plate 4-3 are coaxial with a connecting pump shaft 2, 6 impeller blades 4-1 are fixed between the front cover plate 4-2 and the rear cover plate 4-3, the impeller blades 4-1 are symmetrically arranged along the circumference, two sides of the impeller blades 4-1 are vertical to the front cover plate 4-2 and the rear cover plate 4-3, the three-dimensional flow impeller can adapt to the real flow state of fluid, the flow separation of the working surface of the impeller blades 4-1 is avoided, the flow loss, noise and the impact of the fluid on a pump body 5 are reduced, and the fluid conveying efficiency of the centrifugal pump is improved.

When the utility model is assembled and disassembled, the connecting bracket 3 is vertically arranged, the supporting plate in the connecting bracket 3 is fixedly supported and positioned by the bearing 7, then the connecting pump shaft 2 passes through the supporting and positioning bearing 7 and the supporting plate, a shaft sleeve is rotatably sleeved on the outer side of a connecting pump shaft 2 at the bottom of a supporting plate, a fixing ring 12 is fixed on the outer side of the shaft sleeve, a convex ring at the top of the fixing ring 12 is inserted into a groove ring at the bottom of the supporting plate, the outer side of the fixing ring 12 is in threaded connection with a rotating ring 13, the bottom of the rotating ring 13 is fixed with the top of a backing ring 14, the bottom of the backing ring 14 is connected with one end of a spring 15, the other end of the spring 15 is fixed on an impeller 4, the center of the upper surface of the impeller 4 is fixed with the bottom of the connecting pump shaft 2, a second flanging at the lower end of a connecting support 3 is in bolted connection with a pump body 5, a first flanging; the spring 15 between the backing ring 14 and the impeller 4 provides an adjusting gap for the installation of the impeller 4, the pump body 5 and the connecting bracket 3 in the assembling and disassembling process, so that the two step sealing parts are attached more tightly, the installation of the centrifugal pump is more convenient, and the installation effect is better.

The utility model discloses the power of PMSM 1 is opened in the during operation, PMSM 1 drives and connects pump shaft 2 and at support positioning bearing 7, backup pad and axle sleeve internal rotation, and then drive impeller 4 and rotate at a high speed, make the inside negative pressure that forms of pump body 5, the fluid is carried through the centrifugal pump under the effect of pressure differential, support positioning bearing 7 can guarantee to connect pump shaft 2 and can not take place the skew when rotating at a high speed at this in-process, reduced the ladder seal 10 wearing and tearing between impeller 4 and the pump body 5, between sealing ring and the linking bridge 3, the sealed effect of ladder seal department has been improved, set up two rings of first recess 9 and second recess 11 on ladder seal 10 surface simultaneously, the fluid can form the hydraulic water film when impeller 4 rotates at a high speed, protect ladder seal 10, further improve the result of use of sealed effect and centrifugal pump; the utility model discloses joint through bulge loop and recess ring during the use, improve the sealed effect between solid fixed ring 12 and linking bridge 3, and at solid fixed ring 12 outside threaded connection change ring 13, in order to guarantee solid fixed ring 12 and the inseparable degree of contact of being connected pump shaft 2, set up backing ring 14 in the change ring 13 bottom, and set up spring 15 between backing ring 14 and impeller 4, support change ring 13, change ring 13 and the position separation of solid fixed ring 12 influence sealed effect when preventing high-speed rotation, fluid seepage has been reduced, the life of motor and centrifugal pump has been prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The three-dimensional flow permanent magnet synchronous pipeline type centrifugal pump is characterized by comprising a hollow cylindrical connecting support (3), wherein one end of the outer side of the connecting support (3) is provided with a first flanging, the other end of the outer side of the connecting support (3) close to the other end is provided with a second flanging, a permanent magnet synchronous motor (1) is fixed with the first flanging through a connecting bolt (8), an output shaft of the permanent magnet synchronous motor (1) extends into the connecting support (3), and a pump body (5) is fixed with the second flanging through a bolt;

an annular supporting plate is arranged in the connecting support (3), a supporting and positioning bearing (7) is fixed on one side of the supporting plate close to the permanent magnet synchronous motor (1), a connecting pump shaft (2) is connected in the supporting and positioning bearing (7) in a rotating mode, one end of the connecting pump shaft (2) is fixedly connected with an output shaft of the permanent magnet synchronous motor (1) in an inserting mode, the other end of the connecting pump shaft (2) penetrates through the supporting plate to be fixed with an impeller (4), the impeller (4) is arranged in a cavity of a pump body (5), a shaft sleeve is rotatably sleeved on the outer side of the connecting pump shaft (2) between the supporting plate and the impeller (4), and a sealing assembly (6) is fixed outside;

impeller (4) are close to backup pad one side and are equipped with the sealing ring, the sealing ring outside is equipped with ladder seal (10) with linking bridge (3) inboard, the sealing ring outside is equipped with two rings of second recess (11), backup pad one side is kept away from in impeller (4) also is equipped with ladder seal (10) with pump body (5) inboard, backup pad one side outside is kept away from in impeller (4) is equipped with two rings of first recess (9).

2. The centrifugal pump with the three-dimensional flow permanent magnet synchronous pipeline as claimed in claim 1, wherein the sealing assembly (6) comprises a fixing ring (12), a rotating ring (13) and a backing ring (14) which are fixedly sleeved outside the shaft sleeve, one side of the fixing ring (12) close to the support plate is provided with a fixed protruding ring, the support plate is provided with a groove ring matched with the protruding ring, the protruding ring extends into the groove ring, one side of the fixing ring (12) far away from the support plate is a conical cylinder, the caliber outside the conical cylinder is gradually reduced along the direction from the support plate to the impeller (4), the outer side of the conical cylinder is connected with the rotating ring (13) in a threaded manner, one side of the rotating ring (13) far away from the fixing ring (12) is fixed with the backing ring (14), and a spring (15) is fixed between the backing ring (14) and.

3. The centrifugal pump with three-dimensional flow permanent magnet synchronous pipelines according to claim 1, wherein the impeller (4) comprises a circular front cover plate (4-2) and a circular rear cover plate (4-3), the front cover plate (4-2) and the rear cover plate (4-3) are coaxial with the connecting pump shaft (2), 6 impeller blades (4-1) are fixed between the front cover plate (4-2) and the rear cover plate (4-3), the impeller blades (4-1) are symmetrically arranged along the circumference, and two sides of the impeller blades (4-1) are perpendicular to the front cover plate (4-2) and the rear cover plate (4-3).