CN117386633B

CN117386633B - Leakless magnetic rotary jet pump

Info

Publication number: CN117386633B
Application number: CN202311694208.3A
Authority: CN
Inventors: 许文达; 牟龙龙; 姜林志; 王斌超; 刘华中
Original assignee: Yantai Humon Pumps Co ltd
Current assignee: Yantai Humon Pumps Co ltd
Priority date: 2023-12-12
Filing date: 2023-12-12
Publication date: 2024-03-01
Anticipated expiration: 2043-12-12
Also published as: CN117386633A

Abstract

The invention belongs to the technical field of non-positive displacement pumps, and relates to a leakage-free magnetic rotary jet pump. Including pump housing, collecting pipe, the drive shaft, interior magnetic rotor, outer magnetic rotor, spacer sleeve and impeller, outer magnetic rotor is connected to the drive shaft, outer magnetic rotor is rotatory along with the drive shaft synchrony, outer magnetic rotor's interior installation spacer sleeve, the open end of spacer sleeve is fixed on the pump housing, the spacer sleeve is cut apart into two parts that have liquid chamber and no liquid chamber with the pump housing, interior magnetic rotor is located there is the liquid intracavity, outer magnetic rotor is located no liquid intracavity, the one end of magnetic rotor is installed including the impeller, rotor cavity structure is constituteed to interior magnetic rotor and impeller, the cantilever end setting of collecting pipe is in the rotor cavity, the impeller is in order can around the rotatory mode suit of collecting pipe on the collecting pipe. The invention adopts the magnetic coupling driver to realize the non-contact transmission of the moment, the isolating sleeve can divide the pump housing into the liquid cavity and the non-liquid cavity, and in the pumping process, the medium is completely isolated in the liquid cavity, thereby achieving the effect of preventing the medium from leaking.

Description

Leakless magnetic rotary jet pump

Technical Field

The invention relates to a leakage-free magnetic rotary jet pump, and belongs to the technical field of non-positive displacement pumps.

Background

The rotary jet pump is a unique pump group with small flow and high lift, is used as a low specific speed pump, has the characteristics of high efficiency, stability and reliability, and can replace a high-speed pump and a multi-stage pump. The design of the pump enables the pump to adjust the flow rate at will and work in a full range on the lift curve, providing stable performance.

However, the driving shaft of the existing rotary jet pump is directly connected with the rotating hub in a driving way, and the axial seal between the rotating impeller and the collecting pipe still adopts a mechanical seal mode, namely, the mechanical seal is arranged at the position where the collecting pipe is matched with the impeller to achieve the effect of axial seal. The mechanical seal is a leakage, and a small amount of medium in the rotor cavity can pass through the mechanical seal and leak out of the rotor cavity along the collecting pipe. A leak-free seal is a necessary requirement when delivering some hazardous, corrosive, toxic, flammable, explosive, valuable, vaporizable, volatile, etc. mediums, but the current rotary jet pumps do not meet this requirement.

Therefore, there is a need for a rotary jet pump that satisfies both performance and is leak-free.

Disclosure of Invention

The present invention aims to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

The technical scheme provided by the invention is as follows: the utility model provides a no leakage magnetic force rotary jet pump, includes the pump housing, still includes pressure manifold, drive shaft, interior magnetic rotor, outer magnetic rotor, spacer sleeve and impeller, the drive shaft is connected outer magnetic rotor, outer magnetic rotor is rotatory along with the drive shaft synchrony, the internally mounted of outer magnetic rotor the spacer sleeve, the one end of spacer sleeve is open, and open end is fixed on the pump housing, the spacer sleeve will the pump housing is cut apart into there is liquid chamber and no liquid chamber two parts, interior magnetic rotor is located there is the liquid intracavity, outer magnetic rotor is located there is the liquid intracavity, interior magnetic rotor, outer magnetic rotor and spacer sleeve three are contactless each other, the impeller is installed the one end of interior magnetic rotor, rotor chamber is constituteed to interior magnetic rotor and impeller, the cantilever end of pressure manifold sets up in the rotor chamber, the impeller is in order to wind pressure manifold rotatory mode suit is in on the rotor chamber.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the invention is based on modern magnetic theory, and adopts a magnetic coupling driver to realize the non-contact transmission of moment, the isolating sleeve can divide the pump housing into a liquid cavity and a non-liquid cavity, and in the pumping process, the medium is completely isolated in the liquid cavity, thereby achieving the effect of preventing the medium leakage.

On the basis of the technical scheme, the invention can be improved as follows.

Further, still include a support bearing assembly, a support bearing assembly includes the pressure manifold bearing, support bearing and the bearing housing that set up from inside to outside, have the clearance in the axial between pressure manifold bearing, support bearing and the bearing housing three, the pressure manifold bearing is fixed on the lateral wall of pressure manifold, the bearing housing is fixed on the pump housing, support bearing one end is fixed on the back of impeller is covered, support bearing's the other end with the inboard of bearing housing has first clearance.

The beneficial effect of adopting above-mentioned further scheme is, first support bearing assembly can play the rotatory effect of support impeller around the pressure manifold, and the medium that flows into in the bearing clearance from the rotor chamber returns into the water through the first clearance of reservation, and the circulation flow of medium in first support bearing assembly has solved the cooling and the lubrication problem of first support bearing assembly.

Further, the motor rotor further comprises a second support bearing assembly, the second support bearing assembly comprises an inner magnetic bearing and a spacer sleeve bearing sleeved on the outer side of the inner magnetic bearing, the inner magnetic bearing is fixed at the rear end of the inner magnetic rotor, the spacer sleeve bearing is fixed on the spacer sleeve, and a second gap is reserved between the rear end face of the inner magnetic bearing and the front end face of the spacer sleeve bearing.

Further, a through hole is formed in the bottom of the inner magnetic rotor, and the through hole is communicated with the bottom of the isolation sleeve.

The beneficial effect of adopting above-mentioned further scheme is, the medium in the rotor chamber passes through the second clearance can get into in the second support bearing assembly, solved the cooling and the lubricated problem of second support bearing assembly, the medium can also be followed along the gap between spacer bush and the interior magnetic rotor and returned into the water intake in addition, can take away the vortex heat that interior magnetic rotor and outer magnetic rotor produced.

Further, a water inlet body is further arranged on the pump housing, a water inlet is arranged on the water inlet body, and the water inlet body is communicated with the impeller runner.

Further, the water outlet body is arranged at the front end of the pump housing, a water outlet is arranged on the water outlet body, and the water outlet is communicated with the inner flow passage of the collecting pipe.

Further, the inner magnetic bearing further comprises an inner magnetic end cover, wherein the inner magnetic end cover is used for axially fixing the inner magnetic bearing.

Further, the motor pump further comprises a bearing box, wherein the bearing box is fixed at the rear end of the pump housing, and two ends of the driving shaft are respectively installed in the bearing box through a first bearing and a second bearing.

Further, a bearing isolator is also included, the bearing isolator being disposed between the second bearing and the outer magnetic rotor.

The beneficial effect of adopting above-mentioned further scheme is, is equipped with antifriction bearing inside the bearing box, need utilize the lubrication medium to lubricate and cool off it, can effectively prevent through the bearing isolator that the lubrication medium from leaking outward to can also prevent impurity such as rainwater, dust from getting into inside the bearing box. Therefore, the bearing isolator can play a good role in protecting, ensure the normal operation of a lubricating and cooling system in the bearing box, and improve the service life and stability of equipment.

Further, the novel bearing further comprises a first bearing end cover, wherein the first bearing end cover is sleeved on the driving shaft and is fixed at one end, close to the first bearing, of the bearing box.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a leak-free magnetic rotary jet pump of the present invention;

FIG. 2 is a schematic structural view of a spacer according to the present invention;

in the figure, 1, a water inlet body; 101. a water inlet; 2. a water outlet body; 201. a water outlet; 3. a bearing sleeve; 4. a collecting pipe bearing; 5. a support bearing; 6. an impeller; 601. an impeller runner; 7. an inner magnetic rotor; 701. a rotor cavity; 702. a through hole; 8. a spacer sleeve; 9. an outer magnetic rotor; 10. an inner magnetic bearing; 11. a spacer sleeve bearing; 12. an inner magnetic end cover; 13. a pump housing; 1301. a liquid cavity is arranged; 1302. a liquid-free cavity; 14. a bearing housing; 15. a first bearing end cap; 16. a first bearing; 17. a drive shaft; 18. a bearing isolator; 19. a second bearing; 20. collecting pipes; 2001. an inner flow passage; 21. a rear cover; 22. a bearing sleeve pressing plate; 23. a lock nut; 24. a first seal ring; 25. a first gap; 26. a second gap; 27. a flange edge; 28. a fastening bolt; 29. and a second sealing ring.

Detailed Description

The principles and features of the present invention are described below in connection with examples, which are set forth only to illustrate the present invention and not to limit the scope of the invention.

As shown in fig. 1, the leakage-free magnetic rotary injection pump of the invention comprises a pump housing 13, and further comprises a collecting pipe 20, a driving shaft 17, an inner magnetic rotor 7, an outer magnetic rotor 9, a spacer sleeve 8 and an impeller 6, wherein the driving shaft 17 is connected with the outer magnetic rotor 9, the outer magnetic rotor 9 synchronously rotates along with the driving shaft 17, the spacer sleeve 8 is installed in the outer magnetic rotor 9, one end of the spacer sleeve 8 is opened, the open end is fixed on the pump housing 13, the spacer sleeve 8 divides the pump housing 13 into a liquid cavity 1301 and a liquid cavity 1302, the inner magnetic rotor 7 is positioned in the liquid cavity 1301 on the left side, the outer magnetic rotor 9 is positioned in the liquid cavity 1302 on the right side, the inner magnetic rotor 7, the outer magnetic rotor 9 and the spacer sleeve 8 are not contacted with each other, the impeller 6 is installed at the open end of the inner magnetic rotor 7, the inner magnetic rotor 7 and the impeller 6 form a rotor cavity structure, the cantilever end of the spacer sleeve 8 is arranged in the rotor cavity 701, and the impeller 6 can rotate around the collecting pipe 20 in a sleeving manner on the collecting pipe 20.

As shown in fig. 2, one end of the spacer sleeve 8 is opened to wrap the inner magnetic rotor 7 therein, the open end of the spacer sleeve 8 has a flange 27, the flange 27 is connected with the pump housing 13 by a fastening bolt 28, the spacer sleeve 8 not only separates the inner magnetic rotor 7 from the outer magnetic rotor 9, but also divides the pump housing 13 into a left liquid cavity 1301 and a right liquid cavity 1302, and a second sealing ring 29 is disposed between the flange 27 and the pump housing 13 to prevent the medium from leaking from the left liquid cavity 1301 to the right liquid cavity 1302.

The leakage-free magnetic force rotary jet pump further comprises a first support bearing assembly, the first support bearing assembly comprises a collecting pipe bearing 4, a support bearing 5 and a bearing sleeve 3 which are arranged from inside to outside, gaps are formed among the collecting pipe bearing 4, the support bearing 5 and the bearing sleeve 3 in the axial direction, the collecting pipe bearing 4 is fixed on the outer side wall of the collecting pipe 20, two ends of the collecting pipe bearing 4 are respectively subjected to axial limiting installation through limiting step surfaces and locking nuts 23, the bearing sleeve 3 is fixed on the pump housing 13, the bearing sleeve 3 is subjected to axial limiting installation through a bearing sleeve pressing plate 22, one end of the support bearing 5 is fixed on a rear cover 21 of the impeller 6, a first gap 25 is formed between the other end of the support bearing 5 and the inner side of the bearing sleeve 3, the support bearing 5 rotates along with the impeller 6, and the collecting pipe bearing 4 and the bearing sleeve 3 are static parts.

The first support bearing assembly can play a role in supporting the impeller 6 to rotate around the collecting pipe 20, media flowing into the bearing gap from the rotor cavity 701 returns to the water inlet body 1 through the reserved first gap 25, when the impeller 6 rotates, a layer of water film can be formed between the collecting pipe bearing 4 and the support bearing 5, and the circulating flow of the media in the first support bearing assembly solves the cooling and lubricating problems of the first support bearing assembly.

The leakage-free magnetic rotary jet pump further comprises a second support bearing assembly, the second support bearing assembly comprises an inner magnetic bearing 10 and an isolation sleeve bearing 11 sleeved on the outer side of the inner magnetic bearing 10, the inner magnetic bearing 10 is fixed at the rear end of the inner magnetic rotor 7, the isolation sleeve bearing 11 is fixed on the isolation sleeve 8, the inner magnetic bearing 10 rotates along with the inner magnetic rotor 7, the isolation sleeve bearing 11 is a static piece, and a second gap 26 is reserved between the rear end face of the inner magnetic bearing 10 and the front end face of the isolation sleeve bearing 11.

The bottom of the inner magnetic rotor 7 is provided with a through hole 702, and the through hole 702 is communicated with the bottom of the isolation sleeve 8. The medium in the rotor cavity 701 can enter the second support bearing assembly through the second gap 26, solving the cooling and lubrication problems of the second support bearing assembly.

The impeller 6 comprises a rear cover 21 and a plurality of blades arranged on the end face of the rear cover 21, and an impeller runner 601 is formed between any two adjacent blades. The pump housing 13 is also provided with a water inlet body 1, the water inlet body 1 is provided with a water inlet 101, the water inlet 101 is communicated with the impeller runner 601, and a medium enters the impeller runner 601 through the water inlet 101.

The leakage-free magnetic rotary jet pump further comprises a water outlet body 2, the water outlet body 2 is arranged at the front end of the pump housing 13, a water outlet 201 is arranged on the water outlet body 2, the water outlet 201 is communicated with an inner flow path 2001 of the collecting pipe 20, and the water inlet body 1 is in sealing connection with the collecting pipe 20 through a first sealing ring 24.

The leakage-free magnetic rotary jet pump further comprises an inner magnetic end cover 12, wherein the inner magnetic end cover 12 is used for axially fixing the inner magnetic bearing 10.

The leakage-free magnetic rotary jet pump further comprises a bearing box 14, wherein the bearing box 14 is fixed at the rear end of the pump housing 13, and two ends of the driving shaft 17 are respectively arranged in the bearing box 14 through a first bearing 16 and a second bearing 19.

The leakage-free magnetic rotary jet pump further comprises a bearing isolator 18, the bearing isolator 18 being arranged between the second bearing 19 and the outer magnetic rotor 9.

The leakage-free magnetic rotary jet pump further comprises a first bearing end cover 15, wherein the first bearing end cover 15 is sleeved on the driving shaft 17 and is fixed at one end, close to the first bearing 16, of the bearing box 14.

More specifically, the motor is connected to the drive shaft 17 via a coupling, the outer magnet rotor 9 is fixed to the drive shaft 17, and the inner magnet rotor 7 and the impeller 6 are fastened with a fastener. The rotary jet pump comprises two bearing assemblies, namely a first supporting bearing assembly and a second supporting bearing assembly, wherein the first supporting bearing assembly is arranged at the front end of the rotary jet pump, a bearing sleeve 3 is fixed on a water inlet body 1, a supporting bearing 5 is fixed on a rear cover 21 of an impeller 6, a collecting pipe bearing 4 is arranged on a collecting pipe 20, and the first supporting bearing assembly is used for supporting the front end; the second support bearing assembly is arranged at the rear end of the rotary jet pump and at the bottom of the isolation sleeve 8 and used for supporting the rear end, a first gap 25 is reserved between the bearing sleeve 3 and the support bearing 5, a second gap 26 is reserved between the isolation sleeve bearing 11 and the inner magnetic bearing 10, and in order to ensure the normal operation and performance of the pump, the channeling amount of the pump is required to be accurately calculated, and the first support bearing assembly and the second support bearing assembly are axially limited.

Referring to the direction indicated by the arrow in fig. 1, the internal liquid circulation flow of the leak-free magnetic rotary jet pump of the present invention is as follows:

an isolating sleeve 8 is arranged between the inner magnetic rotor 7 and the outer magnetic rotor 9, the inner magnetic rotor 7 is completely isolated from the outer magnetic rotor 9, when the motor is started, the outer magnetic rotor 9 starts to rotate to generate a rotating magnetic field, and the rotating magnetic field of the outer magnetic rotor 9 interacts with the inner magnetic rotor 7 to form magnetic coupling driving force which is transmitted to the inner magnetic rotor 7.

When the driving force is transmitted to the inner magnetic rotor 7, the driving force acts on the impeller 6, the impeller 6 starts to rotate, the medium enters the impeller runner 601 through the inlet of the water inlet body 1, the medium is conveyed into the rotor cavity 701 under the action of centrifugal force, most of the medium enters the collecting pipe 20, flows through the inner runner 2001 of the collecting pipe 20, and is sprayed out from the water outlet 201 of the water outlet body 2.

When the medium enters the rotor cavity 701, a small part of the medium enters a gap between the support bearing 5 and the collector bearing 4, returns to the water inlet body 1 through the intermediate gap between the bearing sleeve 3 and the support bearing 5, and enters the cavity of the inner magnetic rotor 7 again through the impeller runner 601, so that the circulation is completed. This circulation solves the cooling and lubrication problems of the front end first support bearing assembly.

When the medium enters the rotor cavity 701, a small part of the medium enters the bottom of the isolation sleeve 8 through the through hole 702 at the bottom of the inner magnetic rotor 7, the medium flows through the gap between the inner magnetic bearing 10 and the isolation sleeve bearing 11 to cool and lubricate the inner magnetic bearing 10 and the isolation sleeve bearing 11, and then returns into the water inlet body 1 along the gap between the isolation sleeve 8 and the inner magnetic rotor 7, and enters the cavity of the inner magnetic rotor 7 again through the impeller runner 601, so that the circulation is completed. The circulation not only solves the cooling and lubrication problems of the second support bearing assembly, but also takes away the eddy current heat generated by the inner magnetic rotor 7 and the outer magnetic rotor 9.

Due to the isolation of the isolating sleeve 8, the medium flows circularly in the liquid cavity 1301 on the left side, so that no leakage of the medium can be ensured.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a no leakage magnetic force rotary jet pump, includes pump housing (13), its characterized in that still includes being located pressure manifold (20), drive shaft (17), interior magnetic rotor (7), outer magnetic rotor (9), spacer sleeve (8) and impeller (6), drive shaft (17) connect outer magnetic rotor (9), outer magnetic rotor (9) are rotatory along with drive shaft (17) synchro, the internally mounted of outer magnetic rotor (9) spacer sleeve (8), the one end of spacer sleeve (8) is open, and open end is fixed on pump housing (13), spacer sleeve (8) will pump housing (13) are cut apart into have liquid chamber (1301) and no liquid chamber (1302) two parts, interior magnetic rotor (7) are located in have liquid chamber (1301), outer magnetic rotor (9) are located in no liquid chamber (1302), interior magnetic rotor (7), outer magnetic rotor (9) and spacer sleeve (8) do not contact each other, impeller (6) are installed in rotor (7) in one end, rotor (7) and rotor (701) in cantilever (701) one end are provided with in pressure manifold (20), the impeller (6) is sleeved on the collecting pipe (20) in a mode of being capable of rotating around the collecting pipe (20);

still include first support bearing assembly, first support bearing assembly includes header bearing (4), support bearing (5) and bearing housing (3) that from inside to outside set up, have the clearance in the axial between header bearing (4), support bearing (5) and the bearing housing (3) three, header bearing (4) are fixed on the lateral wall of header (20), bearing housing (3) are fixed on pump housing (13), support bearing (5) one end is fixed on back lid (21) of impeller (6), the other end of support bearing (5) with the inboard of bearing housing (3) has first clearance (25).

2. The leakage-free magnetic rotary jet pump according to claim 1, further comprising a second support bearing assembly, wherein the second support bearing assembly comprises an inner magnetic bearing (10) and a spacer sleeve bearing (11) sleeved outside the inner magnetic bearing (10), the inner magnetic bearing (10) is fixed at the rear end of the inner magnetic rotor (7), the spacer sleeve bearing (11) is fixed on the spacer sleeve (8), and a second gap (26) is formed between the rear end face of the inner magnetic bearing (10) and the front end face of the spacer sleeve bearing (11).

3. A leakage-free magnetic rotary jetting pump according to claim 2, characterized in that the bottom of the inner magnetic rotor (7) is provided with a through hole (702), which through hole (702) leads to the bottom of the spacer sleeve (8).

4. The leakage-free magnetic rotary jet pump according to claim 1, wherein the pump housing (13) is further provided with a water inlet body (1), the water inlet body (1) is provided with a water inlet (101), and the water inlet body (1) is communicated with the impeller runner (601).

5. The leakage-free magnetic rotary jet pump according to claim 1 or 4, further comprising a water outlet body (2), wherein the water outlet body (2) is mounted at the front end of the pump housing (13), a water outlet (201) is arranged on the water outlet body (2), and the water outlet (201) is communicated with an inner flow channel (2001) of the collecting pipe (20).

6. The leakage-free magnetic rotary jetting pump of claim 2, further comprising an inner magnetic end cap (12), the inner magnetic end cap (12) being adapted to axially secure the inner magnetic bearing (10).

7. The leakage-free magnetic rotary jetting pump according to claim 1, further comprising a bearing housing (14), the bearing housing (14) being fixed at a rear end of the pump housing (13), both ends of the drive shaft (17) being mounted in the bearing housing (14) by a first bearing (16) and a second bearing (19), respectively.

8. The leakage-free magnetic rotary jetting pump of claim 7, further comprising a bearing isolator (18), the bearing isolator (18) being disposed between the second bearing (19) and the outer magnetic rotor (9).

9. The leakage-free magnetic rotary jetting pump according to claim 7 or 8, further comprising a first bearing end cap (15), wherein the first bearing end cap (15) is sleeved on the driving shaft (17) and is fixed at one end of the bearing housing (14) close to the first bearing (16).