CN211737469U

CN211737469U - Permanent-magnet horizontal centrifugal pump

Info

Publication number: CN211737469U
Application number: CN201922352943.1U
Authority: CN
Inventors: 叶祥兵
Original assignee: Zhejiang Jusen Mechanical And Electrical Co ltd
Current assignee: Zhejiang Jusen Mechanical And Electrical Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-10-23
Anticipated expiration: 2029-12-24

Abstract

The utility model provides a permanent magnetism horizontal centrifugal pump belongs to centrifugal pump technical field. It has solved the problem of current centrifugal pump thereby increase the energy consumption because of the leakproofness is not good. This permanent magnetism horizontal centrifugal pump includes motor main body, pump cover and impeller, motor main body is including the casing that has end cover, the apparatus further comprises a rotating shaft, permanent magnet rotor and stator, the cover is equipped with the axle sleeve rather than coaxial setting on the periphery wall that the pivot is located end cover right side department, the cover is equipped with rotating assembly on the axle sleeve, be provided with the second grade shoulder shaft that links firmly and restrict the rotating assembly position and be cavity form with the casing mutually on the internal perisporium that is located rotating assembly department in the casing, rotating assembly comprises ball bearing one and ball bearing two, the internal perisporium that second grade shoulder shaft is located two right sides departments of ball bearing is provided with the extension portion of radial inside arch and restriction ball bearing two positions, leave the clearance between the internal perisporium of extension portion and the periphery wall between the corresponding pivot. The utility model has the advantages of good and energy-conserving of leakproofness.

Description

Permanent-magnet horizontal centrifugal pump

Technical Field

The utility model belongs to the technical field of the centrifugal pump, a permanent magnetism horizontal centrifugal pump is related to.

Background

The centrifugal pump has the characteristics of high lift, large flow and the like, and is widely applied to engineering. Because the structure of the centrifugal pump in the prior art is not optimized, the difficulty of installation and maintenance is increased, and the working efficiency is reduced; moreover, the existing centrifugal pump is complex in structure and poor in sealing performance, and in the working process of the existing centrifugal pump, the existing centrifugal pump is large in energy consumption, short in lift, low in energy efficiency, easy to leak and high in failure rate, and does not meet the requirement of energy conservation more and more. Therefore, the permanent magnet centrifugal pump appears in the market, but in the long-term use process of the existing permanent magnet centrifugal pump, the sealing performance of the middle rotating shaft of the permanent magnet centrifugal pump, which extends out of the motor shell, is easy to wear, so that the sealing performance is reduced, the energy consumption of the permanent magnet centrifugal pump is increased, and even the liquid is infiltrated, so that the permanent magnet centrifugal pump is damaged.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a permanent magnetism horizontal centrifugal pump that reduces wear and improve sealing performance.

The purpose of the utility model can be realized by the following technical proposal: a permanent-magnet horizontal centrifugal pump comprises a motor main body, a pump cover and an impeller, wherein the motor main body comprises a shell with a sealing end cover, a rotating shaft, a permanent-magnet rotor and a stator, it is characterized in that a shaft sleeve which is coaxial with the rotating shaft is sleeved on the peripheral wall of the rotating shaft which is positioned at the right side of the sealing end cover, the left end surface of the shaft sleeve is abutted against the right end surface of the sealing end cover, a rotating assembly which is convenient for the shaft sleeve to rotate is sleeved on the shaft sleeve, a hollow second-stage stepped shaft which is fixedly connected with the shell and limits the position of the rotating component is arranged on the inner peripheral wall of the shell positioned at the rotating component, the rotating assembly is composed of a first ball bearing and a second ball bearing, an extension portion which is radially and inwards protruded and limits the position of the second ball bearing is arranged on the inner peripheral wall of the second-stage stepped shaft on the right side of the second ball bearing, and a gap is reserved between the inner peripheral wall of the extension portion and the outer peripheral wall between the corresponding rotating shafts.

In the permanent-magnet horizontal centrifugal pump, the sealing end cover is provided with an opening through which the rotating shaft penetrates and which is matched with the rotating shaft, and an O-shaped sealing ring is arranged between the inner shaft wall of the sealing end cover positioned at the opening and the outer peripheral wall of the corresponding rotating shaft.

In foretell horizontal centrifugal pump of permanent magnetism, the diameter of second grade step shaft from a left side to the right side decrease progressively step by step, and the periphery wall of the minimum diameter department of second grade step shaft hugs closely with the inner peripheral wall of casing, the casing on set up the assembly groove that supplies the installation of second grade step shaft, and the interior periphery wall of assembly groove hugs closely with the outer peripheral wall of second grade step shaft maximum diameter department, second grade step shaft and casing link firmly through a plurality of connecting axle two cooperations, second grade step shaft lie in between the periphery wall of minimum diameter department and the corresponding casing internal peripheral wall and be provided with the sealing washer four of a plurality of axial interval distribution.

In the permanent magnetic horizontal centrifugal pump, a second limiting part which is fixedly connected with the shaft sleeve and used for limiting the position of the first ball bearing is arranged on the outer peripheral wall of the shaft sleeve on the right side of the first ball bearing.

In the permanent magnet horizontal centrifugal pump, the first ball bearing and the second ball bearing are both composed of an outer ring, an inner ring, a retainer, a seal ring five and a first ball.

In foretell permanent magnetism horizontal centrifugal pump, the pivot be located the periphery wall of the right side department of axle sleeve and be provided with the spacing portion one that links firmly mutually and be used for restricting the axle sleeve position with the pivot, the axle sleeve form by left cover and right cover concatenation, and left cover and right cover cooperate through a plurality of connecting axles and link firmly, the terminal surface of left cover and right cover laminating mutually be provided with the axial and overlap the extension that extends and extend into in the right cover right side, right cover in set up the mounting groove that supplies the extension to stretch into the installation, the tank bottom surface of interior terminal surface of extension and mounting groove between be provided with the cover and locate the epaxial seal assembly of pivot.

In the permanent magnet horizontal centrifugal pump, the sealing assembly comprises a first sealing ring, a first annular gasket, a second sealing ring, a second annular gasket, a third sealing ring and a third annular gasket which are sequentially arranged from right to left, the outer end surface of the third annular gasket is abutted against the inner end surface of the extension part, and the first sealing ring, the second sealing ring and the third sealing ring are controlled by the extension part to press the rotating shaft and enable the rotating shaft to be elastically deformed, so that the sealing performance of the joint of the rotating shaft is ensured.

In the above permanent magnetic horizontal centrifugal pump, a sixth sealing ring for enhancing the sealing property is provided between the inner peripheral wall of the extension part and the outer peripheral wall of the corresponding shaft sleeve.

In the above permanent magnetic horizontal centrifugal pump, an annular sealing ring sleeved on the shaft sleeve and used for enhancing the sealing performance is arranged between the first ball bearing and the second ball bearing.

Compared with the prior art, the outer peripheral wall of the rotating shaft positioned at the right side of the sealing end cover in the permanent magnetic horizontal centrifugal pump is sleeved with the shaft sleeve which is coaxially arranged with the rotating shaft, the shaft sleeve is sleeved with the rotating assembly which is convenient for the shaft sleeve to rotate, the inner peripheral wall positioned at the rotating assembly in the shell is provided with the hollow secondary stepped shaft which is fixedly connected with the shell and limits the position of the rotating assembly, the rotating assembly consists of a ball bearing I and a ball bearing II, the inner peripheral wall positioned at the right side of the ball bearing II of the secondary stepped shaft is provided with the extension part which is radially and inwards protruded and limits the position of the ball bearing II, a gap is left between the inner peripheral wall of the extension part and the outer peripheral wall between the corresponding rotating shaft, the sealing end cover is used as a fluid buffer, and the inner structure forms a new sealing structure, so that the sealing performance of the connecting part of the rotating shaft and the, the energy consumption is kept stable, so that the service life is prolonged, and the energy-saving effect is achieved.

Drawings

Fig. 1 is a schematic sectional structure diagram of the permanent magnet horizontal centrifugal pump.

Fig. 2 is an enlarged view of circle a of fig. 1 in the permanent magnet horizontal centrifugal pump.

In the figure, 1, a motor main body; 2. a pump cover; 3. an impeller; 4. a housing; 5. a rotating shaft; 6. a permanent magnet rotor; 7. a stator; 8. a shaft sleeve; 9. a rotating assembly; 10. a secondary stepped shaft; 11. a first ball bearing; 12. a ball bearing II; 13. an extension part; 14. an O-shaped sealing ring; 15. assembling a groove; 16. a second connecting shaft; 17. a fourth sealing ring; 18. a second limiting part; 19. an outer ring; 20. an inner ring; 21. a holder; 22. a sealing ring V; 23. a first limiting part; 24. a left sleeve; 25. a right sleeve; 26. a first connecting shaft; 27. an extension portion; 28. mounting grooves; 29. a seal assembly; 30. a first sealing ring; 31. a first annular gasket; 32. a second sealing ring; 33. a second annular gasket; 34. a third sealing ring; 35. a third annular gasket; 36. a sixth sealing ring; 37. an annular seal ring; 38. sealing the end cap; 39. and a first rolling ball.

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 and fig. 2, the permanent magnetic horizontal centrifugal pump includes a motor body 1, a pump cover 2 fixedly connected with the motor body 1 and having a water inlet and a water outlet, and an impeller 3, the motor body 1 includes a housing 4 having a sealing end cover 38, a rotating shaft 5, a permanent magnetic rotor 6 and a stator 7, the sealing end cover 38 is detachably connected with the housing 4 through a plurality of screws arranged along the circumferential direction thereof, one end of the rotating shaft 5 extends out of the sealing end cover 38 and is connected with the sealing end cover 38 in a matching manner, the impeller 3 is arranged in the pump cover 2 and is coaxially arranged with the rotating shaft 5 in the motor body 1, the permanent magnetic rotor 6 is in a cylindrical shape magnetized with two radial poles, the stator 7 includes a U-shaped laminated iron core and a stator 7 winding through which the iron core passes, a shaft sleeve 8 coaxially arranged with the rotating shaft 5 is sleeved on the outer peripheral wall of the right side of the sealing end cover 38, the left end face of the, the shaft sleeve 8 is arranged between the permanent magnet rotor 6 and the sealing end cover 38, the same rotating shaft 5 of the shaft sleeve 8 is fixedly connected through a key block, a rotating component 9 convenient for the rotation of the shaft sleeve 8 is sleeved on the shaft sleeve 8, a second-stage stepped shaft 10 which is fixedly connected with the shell 4 and limits the position of the rotating component 9 and is hollow is arranged on the inner peripheral wall of the shell 4 at the position of the rotating component 9, the rotating component 9 consists of a ball bearing I11 and a ball bearing II 12, the ball bearing I11 and the ball bearing II 12 are respectively and fixedly connected with the shaft sleeve 8 and the second-stage stepped shaft 10 through interference fit, an extension part 13 which is radially and inwards protruded and limits the position of the ball bearing II 12 is arranged on the inner peripheral wall of the second-stage stepped shaft 10 at the right side of the ball bearing II 12, a gap is reserved between the inner peripheral wall of the extension part 13 and the outer peripheral wall of the corresponding, the outer peripheral wall of the minimum diameter position of the secondary stepped shaft 10 is tightly attached to the inner peripheral wall of the shell 4, the shell 4 is provided with an assembly groove 15 for mounting the secondary stepped shaft 10, the inner peripheral wall of the assembly groove 15 is tightly attached to the outer peripheral wall of the maximum diameter position of the secondary stepped shaft 10, the outer end surface of the mounted secondary stepped shaft 10 is attached to the inner end surface of the sealing end cover 38, the secondary stepped shaft 10 is fixedly connected with the shell 4 through a plurality of detachable connecting shafts two 16 which are distributed at intervals along the circumferential direction of the secondary stepped shaft, the connecting shafts two 16 are arranged at the stepped surfaces in the secondary stepped shaft 10, the outer end surface of the connecting shafts two 16 is attached to the inner end surface of the sealing end cover 38, a plurality of sealing rings four 17 which are distributed at intervals in the axial direction are arranged between the outer peripheral wall of the minimum diameter position of the secondary stepped shaft 10 and the inner peripheral wall of the corresponding shell, the inner end surface of the secondary stepped shaft 10 is flush with the inner end surface of the shaft sleeve 8.

As a preferable structure, a second limiting part 18 which is fixedly connected with the shaft sleeve 8 and can be detached and used for limiting the position of the first ball bearing 11 is arranged on the outer peripheral wall of the shaft sleeve 8, which is positioned at the right side of the first ball bearing 11.

As a preferable structure, the first ball bearing 11 and the second roller bearing are both composed of an outer ring 19, an inner ring 20, a retainer 21, a seal ring five 22 and a first ball 39, and the seal ring five 22 plays a role in water and dust prevention.

In more detail, in order to increase the sealing performance at the joint between the rotating shaft 5 and the sealing end cover 38, an opening is formed in the sealing end cover 38, through which the rotating shaft 5 penetrates and which is matched with the rotating shaft 5, an O-shaped sealing ring 14 is arranged between an inner shaft wall of the sealing end cover 38 at the opening and the outer peripheral wall of the corresponding rotating shaft 5, and a groove for installing the O-shaped sealing ring 14 is formed in the sealing end cover 38.

In more detail, in order to increase the sealing performance between the shaft sleeve 8 and the rotating shaft 5, a first limiting portion 23 fixedly connected with the rotating shaft 5 and used for limiting the position of the shaft sleeve 8 is arranged on the outer peripheral wall of the rotating shaft 5 at the right side of the shaft sleeve 8, the first limiting portion 23 is fixedly connected with the rotating shaft 5 through a key block, the shaft sleeve 8 is formed by splicing a left sleeve 24 and a right sleeve 25, the left sleeve 24 and the right sleeve 25 are fixedly connected in a matching manner through a plurality of detachable connecting shafts 26 distributed at intervals along the circumferential direction of the left sleeve and the right sleeve 25, the first connecting shafts 26 penetrate through the left sleeve 24 and penetrate into the right sleeve 25, the outer end face of each connecting shaft is flush with the outer end face of the left sleeve 24, an extending portion 27 axially extending towards the right sleeve 25 and extending into the right sleeve 25 is arranged on the end face of the left sleeve 24, an installation groove 28 for extending the extending portion 27 into is arranged in the right sleeve 25, a sealing assembly 29 sleeved on the rotating shaft 5 is arranged between the, the sealing assembly 29 comprises a first sealing ring 30, a first annular gasket 31, a second sealing ring 32, a second annular gasket 33, a third sealing ring 34 and a third annular gasket 35 which are arranged in sequence from right to left, the outer end surface of the third annular gasket 35 is abutted to the inner end surface of the extension portion 27, and the first sealing ring 30, the second sealing ring 32 and the third sealing ring 34 are controlled by the extension portion 27 to press the rotating shaft 5 and enable the rotating shaft to elastically deform, so that the sealing performance of the connection position of the rotating shaft is ensured.

More specifically, in order to increase the sealing performance between the extension portion 13 and the sleeve 8, a seal ring six 36 for enhancing the sealing performance is provided between the inner peripheral wall of the extension portion 13 and the outer peripheral wall of the corresponding sleeve 8, and a groove for mounting the seal ring six 36 is formed in the extension portion 13.

In more detail, in order to increase the sealing performance between the first ball bearing 11 and the second ball bearing 12, an annular sealing ring 37 which is sleeved on the shaft sleeve 8 and used for enhancing the sealing performance is arranged between the first ball bearing 11 and the second ball bearing 12, and a gap for installing the annular sealing ring 37 is reserved between the inner end surface of the first ball bearing 11 on the shaft sleeve 8 and the inner end surface of the second ball bearing 12 on the shaft sleeve 8.

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 permanent magnetic horizontal centrifugal pump comprises a motor main body (1), a pump cover (2) and an impeller (3), wherein the motor main body (1) comprises a shell (4) with a sealing end cover (38), a rotating shaft (5), a permanent magnetic rotor (6) and a stator (7), and is characterized in that a shaft sleeve (8) which is coaxially arranged with the rotating shaft (5) is sleeved on the peripheral wall of the right side of the sealing end cover (38) of the rotating shaft (5), the left end surface of the shaft sleeve (8) is abutted against the right end surface of the sealing end cover (38), a rotating assembly (9) which is convenient for the rotation of the shaft sleeve (8) is sleeved on the shaft sleeve (8), a second-stage stepped shaft (10) which is fixedly connected with the shell (4) and limits the position of the rotating assembly (9) and is hollow is arranged on the inner peripheral wall of the rotating assembly (9) in the shell (4), and the rotating assembly (9) consists of a first ball bearing (11) and a second ball bearing (12, and an extension part (13) which is radially and inwards protruded and limits the position of the second ball bearing (12) is arranged on the inner peripheral wall of the second-stage stepped shaft (10) positioned at the right side of the second ball bearing (12), and a gap is reserved between the inner peripheral wall of the extension part (13) and the outer peripheral wall between the corresponding rotating shafts (5).

2. The permanent-magnet horizontal centrifugal pump according to claim 1, wherein the end cover (38) is provided with an opening through which the rotating shaft (5) passes and which is matched with the rotating shaft (5), and an O-ring (14) is arranged between an inner shaft wall of the end cover (38) at the opening and the outer peripheral wall of the corresponding rotating shaft (5).

3. The permanent-magnet horizontal centrifugal pump according to claim 1, wherein the diameter of the secondary stepped shaft (10) decreases progressively from left to right, the outer peripheral wall of the minimum diameter of the secondary stepped shaft (10) is tightly attached to the inner peripheral wall of the casing (4), an assembly groove (15) for mounting the secondary stepped shaft (10) is formed in the casing (4), the inner peripheral wall of the assembly groove (15) is tightly attached to the outer peripheral wall of the maximum diameter of the secondary stepped shaft (10), the secondary stepped shaft (10) is fixedly connected with the casing (4) through a plurality of connecting shafts II (16), and a plurality of sealing rings IV (17) are axially distributed at intervals between the outer peripheral wall of the minimum diameter of the secondary stepped shaft (10) and the inner peripheral wall of the corresponding casing (4).

4. The permanent-magnet horizontal centrifugal pump according to claim 1, wherein a second limiting portion (18) fixedly connected with the shaft sleeve (8) and used for limiting the position of the first ball bearing (11) is arranged on the outer peripheral wall of the shaft sleeve (8) at the right side of the first ball bearing (11).

5. The permanent magnet horizontal centrifugal pump according to claim 1, wherein the first ball bearing (11) and the second ball bearing are both composed of an outer ring (19), an inner ring (20), a retainer (21), a seal ring five (22) and a first ball (39).

6. The permanent-magnet horizontal centrifugal pump according to claim 1, wherein a first limiting part (23) fixedly connected with the rotating shaft (5) and used for limiting the position of the shaft sleeve (8) is arranged on the outer peripheral wall of the rotating shaft (5) at the right side of the shaft sleeve (8), the shaft sleeve (8) is formed by splicing a left sleeve (24) and a right sleeve (25), the left sleeve (24) and the right sleeve (25) are matched and fixedly connected through a plurality of connecting shafts I (26), the end surface of the left sleeve (24) which is jointed with the right sleeve (25) is provided with an extension part (27) which axially extends towards the right sleeve (25) and extends into the right sleeve (25), a mounting groove (28) for the extension part (27) to extend into is arranged in the right sleeve (25), and a sealing component (29) sleeved on the rotating shaft (5) is arranged between the inner end surface of the extension part (27) and the groove bottom surface of the mounting groove (28).

7. The permanent magnet horizontal centrifugal pump according to claim 6, wherein the seal assembly (29) comprises a first seal ring (30), a first annular gasket (31), a second seal ring (32), a second annular gasket (33), a third seal ring (34) and a third annular gasket (35) which are arranged in sequence from right to left, the outer end face of the third annular gasket (35) is abutted to the inner end face of the extension portion (27), and the first seal ring (30), the second seal ring (32) and the third seal ring (34) are controlled by the extension portion (27) to press the rotating shaft (5) and enable the rotating shaft to be elastically deformed, so that the sealing performance of the connection position is ensured.

8. A permanent-magnet horizontal centrifugal pump according to claim 1, characterized in that a sealing ring six (36) for enhancing the sealing property is arranged between the inner peripheral wall of the extension part (13) and the outer peripheral wall of the corresponding shaft sleeve (8).

9. The permanent-magnet horizontal centrifugal pump according to claim 1, wherein an annular sealing ring (37) which is sleeved on the shaft sleeve (8) and used for enhancing the sealing performance is arranged between the first ball bearing (11) and the second ball bearing (12).