Stirring impeller for water pump

Abstract

The utility model relates to the technical field of water pumps, in particular to a stirring impeller for a water pump, which comprises an impeller shaft, blades and an end cover, the impeller shaft is provided with a transmission hole, the end cover is connected to the impeller shaft, the periphery of the impeller shaft is provided with a ring groove, and the plurality of blades are circumferentially distributed at intervals around the axis of the impeller shaft; the connecting part is slidably embedded in the annular groove in the axis direction of the impeller shaft, the two ends of the connecting part abut against the groove wall of the annular groove and the end cover correspondingly, the first limiting strip is connected to the inner side of the connecting part, and a first limiting groove is formed in the groove bottom of the annular groove and slidably embedded in the first limiting groove; the first limiting strip and the first limiting groove are relatively fixed in the direction perpendicular to the axis of the impeller shaft, and the blade part is connected to the outer side of the connecting part. The blades are embedded in the annular grooves in the axial direction of the impeller shaft in a sliding mode, the end cover is connected to the impeller shaft to abut against the blades, detachable connection of the whole stirring impeller is achieved, replacement and maintenance of the whole stirring impeller are facilitated, the maintenance cost is reduced, and the service life of the stirring impeller is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water pumps, in particular to a stirring impeller for a water pump. BACKGROUND

[0002] Before working, the water pump and the water inlet pipe must be filled with water, and then the water is made to obtain energy under the action of inertial centrifugal force by the high-speed rotating impeller, so that the internal pressure of the water pump can be increased; when the impeller rotates rapidly, the blades promote the water to rotate rapidly, and the water is thrown out of the impeller under the action of centrifugal force; after the water in the water pump is thrown out, a vacuum area is formed in the central part of the impeller; then the water in the water source enters the water inlet pipe under the action of atmospheric pressure (or water pressure); the cycle is not stopped, so that continuous water pumping can be realized. Because the water pump has the advantages of simple structure, easy operation, easy flow adjustment and suitability for conveying various special property materials, the water pump is widely applied in various fields, such as various industrial sites and various household appliances, such as washing machines, dishwashers and air conditioners.

[0003] The water pump impeller is rotated by the motor, a vacuum is generated in the middle of the impeller, water flows into the vacuum (apparently, the impeller continuously sucks water), then the water is discharged by the high-speed rotating impeller, and the impeller plays a role of pushing water. The blades on the impeller are easy-to-wear articles, and the existing impeller is directly replaced when the blades are damaged; the replacement operation is inconvenient, and the replacement cost is high. CONTENT OF THE UTILITY MODEL

[0004] In order to reduce the production cost of the water pump and prolong the service life of the impeller, the application provides a stirring impeller for a water pump.

[0005] The stirring impeller for the water pump provided by the application adopts the following technical scheme:

[0006] The utility model provides an agitator vane for water pump, including vane shaft, blade and end cover, the vane shaft is provided with transmission hole coaxially, is used for the motor output shaft embedding, the end cover is connected in the vane shaft one end, the vane shaft periphery is equipped with ring groove, one end of ring groove near the end cover penetrates the vane shaft, the blade includes several, several blade is spaced apart and is distributed around the vane shaft axis, the blade includes connecting portion, blade portion and first limit strip, the connecting portion is slidably embedded in the ring groove, the sliding direction of connecting portion is parallel to the axial direction of vane shaft, one end of connecting portion abuts ring groove groove wall, the other end of connecting portion abuts end cover, the first limit strip is connected to the inboard of connecting portion, the ring groove bottom is equipped with first limit groove, the first limit groove number is same with the first limit strip number and one-to-one correspondence, one end of first limit groove near the end cover penetrates the vane shaft, the first limit strip is slidably embedded in the first limit groove, the sliding direction of first limit strip is parallel to the sliding direction of connecting portion, the first limit strip and first limit groove are relatively fixed along the perpendicular direction of vane shaft axis, the blade portion is connected to the outside of connecting portion.

[0007] Through adopting the technical scheme, the blade is slidably embedded in the ring groove along the axial direction of the vane shaft, the end cover is connected to the vane shaft and abuts the blade, the detachable connection of the whole agitator vane is realized, the replacement and maintenance of the whole agitator vane are facilitated, the maintenance cost is reduced, and the service life of the agitator vane is improved.

[0008] Preferably, the vane shaft is coaxially provided with a connecting groove at the end near the end cover, the end cover is coaxially connected with a connecting column, and the connecting column is coaxially and threadedly connected in the connecting groove.

[0009] Through adopting the technical scheme, the connecting column and the connecting groove are threadedly connected, the fixed connection of the end cover and the vane shaft is realized, the possibility of loosening caused by vibration during the use of the agitator vane is reduced, the working stability and safety of the whole agitator vane are improved, the threaded connection facilitates the disassembly and maintenance of the agitator vane, the user can conveniently check or replace the blade, the maintenance cost and time are reduced.

[0010] Preferably, the end cover is coaxially provided with a convex ring at the end near the vane shaft, the connecting portion is provided with an embedding groove at the end near the end cover, the convex ring is embedded in the embedding groove, and the side wall of the convex ring is fitted with the groove wall of the embedding groove.

[0011] Through adopting the technical scheme, the end cover is coaxially provided with a convex ring at the end near the vane shaft, the connecting portion is provided with an embedding groove at the end near the end cover, the convex ring is embedded in the embedding groove, and the side wall of the convex ring is fitted with the groove wall of the embedding groove, the blade is prevented from being separated from the vane shaft along the direction perpendicular to the axial direction of the vane shaft, the stability of the connection between the end cover and the blade is improved, the stability of the connection between the blade and the vane shaft is further realized, the possibility of loosening or falling off of the blade during high-speed rotation is reduced, and the reliability of the agitator vane is improved.

[0012] Preferably, the first limiting slot is provided with a sliding groove at the bottom, the positioning column is slidably embedded in the sliding groove, the sliding direction of the positioning column is perpendicular to the axis direction of the impeller shaft, the side of the first limiting strip away from the connecting part is provided with a positioning groove for embedding the positioning column, the outer periphery of one end of the positioning column close to the first limiting slot is provided with a third round corner for abutting with the groove wall of the positioning groove, and the reset member is connected between the impeller shaft and the positioning column, so that one end of the positioning column has a tendency to extend into the first limiting slot.

[0013] By adopting the above technical scheme, when the blade is installed, the first limiting strip abuts against the third round corner, so that the positioning column is embedded in the ring groove against the elastic force of the reset member, when the positioning groove is opposite to the sliding groove, the positioning column is embedded in the positioning groove, the preliminary fixation of the blade and the impeller shaft is realized, and the subsequent installation of the end cover is facilitated.

[0014] Preferably, the end of the sliding groove away from the first limiting slot is communicated with the transmission hole, the other end of the positioning column extends into the transmission hole, the end of the positioning column close to the transmission hole is provided with a first chamfer, the first chamfer is located on the side of the positioning column away from the end cover, and the first chamfer is used for abutting with the motor output shaft.

[0015] By adopting the above technical scheme, the sliding groove is communicated with the transmission hole, so that one end of the positioning column extends into the transmission hole, when the motor output shaft is embedded and connected with the stirring impeller, the motor output shaft abuts against the first chamfer to push the positioning column to be embedded in the positioning groove, the relative fixation of the impeller and the impeller shaft along the circumferential direction of the impeller shaft is further realized, the impeller shaft drives the blade to rotate, and the reliability of the stirring impeller is improved.

[0016] Preferably, one first limiting slot corresponds to a plurality of sliding grooves, the plurality of sliding grooves are distributed along the axis direction of the impeller shaft, and the number of the positioning columns, the reset members and the positioning grooves is the same as and one-to-one corresponds to the number of the sliding grooves.

[0017] By adopting the above technical scheme, a plurality of sliding grooves are distributed along the axis direction of the impeller shaft, each sliding groove corresponds to a positioning column, a reset member and a positioning groove, the stability of the connection between the blade and the impeller shaft is improved, and the reliability of the stirring impeller is improved.

[0018] Preferably, the side of the connecting part close to the first limiting strip is connected with a second limiting strip, the bottom of the ring groove is provided with a second limiting slot, the number of the second limiting slots is the same as and one-to-one corresponds to the number of the second limiting strips, one end of the second limiting slot close to the end cover penetrates the impeller shaft, the second limiting strip is slidably embedded in the second limiting slot, and the sliding direction of the second limiting strip is parallel to the axis direction of the impeller shaft.

[0019] By adopting the technical scheme, the stability of the connection between the blade and the impeller shaft is improved, the possibility of the blade deviating or falling off during rotation is reduced, and the overall reliability of the stirring impeller is improved.

[0020] Preferably, the first limiting groove is provided with a first fillet at the groove wall near one end of the end cover, and the second limiting groove is provided with a second fillet at the groove wall near one end of the end cover.

[0021] By adopting the technical scheme, the first fillet and the second fillet are provided to guide the installation of the first limiting strip and the second limiting strip, facilitate the embedding of the first limiting strip into the first limiting groove and the embedding of the second limiting strip into the second limiting groove, and improve the assembly efficiency of the stirring impeller.

[0022] Preferably, the connecting part is provided with a groove on one side near the bottom of the ring groove, the groove is located on one side of the connecting part along the circumferential direction of the connecting part, the other side of the connecting part along the circumferential direction of the connecting part is connected with a protrusion, the protrusion is used for embedding into the groove of the adjacent connecting part, and the surface of the side of the protrusion away from the bottom of the ring groove is in close contact with the groove wall.

[0023] By adopting the technical scheme, the connecting parts between the two adjacent blades are matched through the groove and the protrusion, the stability between the two adjacent blades is improved, the possibility of loosening or mispositioning of the blades during high-speed rotation is reduced, and the reliability of the stirring impeller is improved.

[0024] Preferably, the outer part of the end cover near one end of the impeller shaft is flush with the outer wall of the connecting part, the end cover away from the impeller shaft is gradually expanded towards the side near the impeller shaft along the axis direction of the impeller shaft, and the end cover away from the impeller shaft is provided with a fourth fillet.

[0025] By adopting the technical scheme, the structural design of the end cover ensures smooth flow of water in the water pump during operation, reduces turbulence and resistance, and improves the working efficiency of the water pump.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The blade is embedded in the ring groove along the axis direction of the impeller shaft, and the end cover is connected to the impeller shaft to abut the blade, realizing detachable connection of the whole stirring impeller, facilitating replacement and maintenance of the whole stirring impeller, reducing maintenance cost, and prolonging the service life of the stirring impeller.

[0028] 2. When the blade is installed, the first limiting strip abuts the third fillet, so that the positioning column is embedded in the ring groove against the elastic force of the return element, and when the positioning groove is opposite to the sliding groove, the positioning column is embedded in the positioning groove, realizing preliminary fixation of the blade and the impeller shaft, and facilitating subsequent installation of the end cover.

[0029] 3. The connection between the two adjacent blades is matched by the groove and the protrusion, which improves the stability between the two adjacent blades, reduces the possibility of loosening or misplacement of the blades during high-speed rotation, and improves the reliability of the stirring impeller. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of a stirring impeller for a water pump.

[0031] Figure 2 is a sectional view of a stirring impeller for a water pump.

[0032] Figure 3 is a sectional view of a stirring impeller for a water pump.

[0033] Figure 4 is an exploded structural schematic diagram of a stirring impeller for a water pump.

[0034] Figure 5 is Figure 2 is an enlarged view of A in FIG.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1. Impeller shaft; 11. Transmission hole; 12. Ring groove; 13. First limiting groove; 14. Connection groove; 15. Slide groove; 16. Second limiting groove; 17. First fillet; 18. Second fillet; 19. Abutting groove;

[0037] 2. Blade; 21. Connection part; 211. Embedding groove; 212. Groove; 213. Protrusion; 22. Blade part; 23. First limiting strip; 231. Positioning groove; 24. Second limiting strip;

[0038] 3. End cover; 31. Connection column; 32. Protruding ring; 33. Fourth fillet;

[0039] 4. Fixing assembly; 41. Positioning column; 411. Third fillet; 412. First chamfer; 413. Abutting ring; 42. Reset member. DETAILED DESCRIPTION

[0040] The application will be further described in detail below with reference to the accompanying drawings.

[0041] Referring to Figure 1 , the application discloses a stirring impeller for a water pump, which comprises an impeller shaft 1 and an end cover 3. The end cover 3 is coaxially fixedly connected to one end of the impeller shaft 1 along the axial direction of the impeller shaft 1. The end cover 3 is in close contact with the end of the impeller shaft 1. The outer wall of the end cover 3 close to one end of the impeller shaft 1 is flush with the outer wall of the impeller shaft 1. The end of the end cover 3 away from the impeller shaft 1 is gradually expanded towards the side close to the impeller shaft 1 along the axial direction of the impeller shaft 1. The end of the end cover 3 away from the impeller shaft 1 is provided with a fourth fillet 33.

[0042] With reference to Figure 2 The impeller shaft 1 is coaxially provided with a connecting groove 14 at one end close to the end cover 3. The end cover 3 is coaxially fixedly connected with a connecting column 31 at one end close to the impeller shaft 1. The connecting column 31 is coaxially screwed into the connecting groove 14. The other end of the impeller shaft 1 is coaxially provided with a transmission hole 11. The transmission hole 11 is in communication with the connecting groove 14. The transmission hole 11 is used for embedding the output shaft of the motor.

[0043] With reference to Figure 1 and Figure 2 The impeller further comprises a plurality of blades 2. The plurality of blades 2 are circumferentially and spacedly distributed around the axis of the impeller shaft 1. In this embodiment, the plurality of blades 2 are three. The three blades 2 are circumferentially and evenly distributed around the axis of the impeller shaft 1. The blade 2 comprises a connecting portion 21. The outer periphery of the impeller shaft 1 is coaxially provided with a ring groove 12. The ring groove 12 penetrates the impeller shaft 1 at one end close to the end cover 3. The connecting portion 21 is slidably embedded in the ring groove 12. The sliding direction of the connecting portion 21 is parallel to the axis direction of the impeller shaft 1. The connecting portion 21 is arc-shaped. The inner wall of the connecting portion 21 is in abutment with the groove bottom of the ring groove 12. The outer wall of the connecting portion 21 is flush with the outer wall of the impeller shaft 1. One end of the connecting portion 21 along the axis direction of the impeller shaft 1 abuts against the groove wall of the ring groove 12 away from the end cover 3. The other end of the connecting portion 21 abuts against the side surface of the end cover 3 close to the impeller shaft 1. One end of the connecting portion 21 close to the end cover 3 is provided with an embedding groove 211. The embedding groove 211 penetrates the connecting portion 21 along the circumferential direction of the connecting portion 21. The end cover 3 is coaxially fixedly connected with a convex ring 32 at one end close to the impeller shaft 1. The convex ring 32 is embedded in the embedding groove 211. The side wall of the convex ring 32 is in abutment with the groove wall of the embedding groove 211. One side of the connecting portion 21 close to the groove bottom of the ring groove 12 is provided with a recess 212. The recess 212 is located at one end of the connecting portion 21 along the circumferential direction of the connecting portion 21. The cross section of the recess 212 is triangular. The other end of the connecting portion 21 is fixedly connected with a convex block 213. The convex block 213 is used for being embedded in the recess 212 of the adjacent connecting portion 21. The side surface of the convex block 213 away from the groove bottom of the ring groove 12 is in abutment with the groove wall of the recess 212.

[0044] With reference to Figure 3 and Figure 4, the blade 2 further comprises a blade part 22 and a first limiting strip 23. The blade part 22 is fixedly connected to the outer periphery of the connecting part 21, and the blade part 22 is in a spiral shape. The first limiting strip 23 is fixedly connected to the inner side of the connecting part 21, and the length direction of the first limiting strip 23 is parallel to the axis direction of the impeller shaft 1. The groove bottom of the ring groove 12 is provided with a first limiting groove 13, the number of the first limiting groove 13 is the same as and one-to-one corresponds to the number of the first limiting strip 23, and one end of the first limiting groove 13 close to the end cover 3 penetrates the impeller shaft 1. The first limiting strip 23 is slidingly embedded in the first limiting groove 13, the sliding direction of the first limiting strip 23 is parallel to the length direction of the first limiting strip 23, and the side wall of the first limiting strip 23 is in close contact with the groove wall of the first limiting groove 13. In the embodiment, the cross section of the first limiting strip 23 is dovetail-shaped. The groove wall at one end of the first limiting groove 13 close to the end cover 3 is provided with a first round corner 17, and the first round corner 17 is used for abutting against the first limiting strip 23.

[0045] With reference to Figure 2 and Figure 5 , the stirring impeller for water pump further comprises a fixing assembly 4, and the fixing assembly 4 comprises a positioning column 41 and a reset member 42. The groove bottom of the first limiting groove 13 is provided with a sliding groove 15, the sliding groove 15 is in communication with the transmission hole 11, and the axis of the sliding groove 15 is coplanar with the axis of the impeller shaft 1. In the embodiment, one first limiting groove 13 corresponds to three sliding grooves 15, and the three sliding grooves 15 are uniformly distributed along the axis of the impeller shaft 1. The number of the positioning column 41 and the reset member 42 is the same as and one-to-one corresponds to the number of the sliding groove 15, the positioning column 41 is coaxially slidingly embedded in the sliding groove 15, one end of the positioning column 41 is embedded in the first limiting groove 13, and the other end of the positioning column 41 is embedded in the transmission hole 11. One side of the first limiting strip 23 away from the connecting part 21 is provided with a positioning groove 231, the number of the positioning groove 231 is the same as and one-to-one corresponds to the number of the positioning column 41, and the positioning groove 231 is used for embedding the positioning column 41. The outer periphery of one end of the positioning column 41 close to the first limiting groove 13 is provided with a third round corner 411, and the third round corner 411 is used for abutting against the groove wall of the positioning groove 231. The other end of the positioning column 41 is provided with a first chamfer 412, the first chamfer 412 is located on the side of the positioning column 41 away from the end cover 3, and the first chamfer 412 is used for abutting against the motor output shaft. The groove wall of the first sliding groove 15 is coaxially provided with an abutting groove 19, the outer periphery of the positioning column 41 is coaxially fixedly connected with an abutting ring 413, the abutting ring 413 is slidingly embedded in the abutting groove 19, and the sliding direction of the abutting ring 413 is parallel to the sliding direction of the positioning column 41. The reset member 42 is connected between the abutting ring 413 and the impeller shaft 1, and the reset member 42 makes the positioning column 41 have a tendency to extend into the first limiting groove 13. In the embodiment, the reset member 42 adopts a spring, one end of the reset member 42 is connected to the side surface of the abutting ring 413 close to the transmission hole 11, and the other end of the reset member 42 is connected to the side groove wall of the abutting groove 19 close to the transmission hole 11.

[0046] With reference to Figure 3 and Figure 4The blade 2 further comprises a second limiting strip 24 fixedly connected to the inner side of the connecting portion 21, and the length direction of the second limiting strip 24 is parallel to the length direction of the first limiting strip 23. Two second limiting strips 24 are symmetrically distributed along the circumference of the connecting portion 21. The bottom of the ring groove 12 is provided with a second limiting groove 16, the number of the second limiting groove 16 is the same as that of the second limiting strip 24 and one-to-one corresponding, one end of the second limiting groove 16 close to the end cover 3 penetrates the impeller shaft 1, the second limiting strip 24 is slidingly embedded in the second limiting groove 16, the sliding direction of the second limiting strip 24 is parallel to the axis direction of the impeller shaft 1, and the side wall of the second limiting strip 24 is in close contact with the groove wall of the second limiting groove 16. In the embodiment, the cross section of the second limiting strip 24 is rectangular. The groove wall at one end of the second limiting groove 16 close to the end cover 3 is provided with a second round corner 18, and the second round corner 18 is used for abutting against the second limiting strip 24.

[0047] The implementation principle of the stirring impeller for a water pump according to the embodiment of the application is as follows: during assembly, the first limiting strip 23 is aligned with the first limiting groove 13, the first limiting strip 23 abuts against the first round corner 17, the first limiting strip 23 is slidingly embedded in the first limiting groove 13, the second limiting strip 24 abuts against the second round corner 18, and the second limiting strip 24 is embedded in the second limiting groove 16. When the first limiting strip 23 abuts against the third round corner 411, the positioning column 41 is slidingly embedded in the positioning groove 231, the blade 2 continues to slide, the positioning groove 231 abuts against the third round corner 411, the positioning column 41 is slidingly embedded in the positioning groove 231, the connecting portion 21 abuts against the groove wall of the sliding groove 15, and the three positioning columns 41 are respectively embedded in the three positioning grooves 231. The installation of the three blades 2 is sequentially completed, the connecting column 31 is threadedly connected in the connecting groove 14, the end cover 3 abuts against the impeller shaft 1 and the connecting portion 21, and the convex ring 32 is embedded in the embedding groove 211, thereby completing the installation of the stirring impeller.

[0048] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. An agitator impeller for a water pump, characterized by: The utility model provides a kind of impeller, including impeller shaft (1), blade (2) and end cover (3);The impeller shaft (1) is coaxially provided with transmission hole (11);The transmission hole (11) is used for motor output shaft embedding;The end cover (3) is connected to one end of impeller shaft (1);The outer periphery of the impeller shaft (1) is provided with annular groove (12);The annular groove (12) is close to one end of end cover (3) and penetrates impeller shaft (1);The blade (2) includes several;Several the blade (2) is distributed in the circumferential direction interval around the axis of impeller shaft (1);The blade (2) includes connecting portion (21), blade portion (22) and first limiting strip (23);The connecting portion (21) is slidably embedded in annular groove (12);The sliding direction of the connecting portion (21) is parallel to the axial direction of impeller shaft (1);One end of the connecting portion (21) abuts annular groove (12) groove wall;The other end of the connecting portion (21) abuts end cover (3);The first limiting strip (23) is connected to the inner side of connecting portion (21);The groove bottom of the annular groove (12) is provided with first limiting groove (13);The number of the first limiting groove (13) is same with the number of first limiting strip (23) and one-to-one correspondence;The first limiting groove (13) is close to one end of end cover (3) and penetrates impeller shaft (1);The first limiting strip (23) is slidably embedded in first limiting groove (13);The sliding direction of the first limiting strip (23) is parallel to the sliding direction of connecting portion (21);The first limiting strip (23) and first limiting groove (13) are relatively fixed along the direction perpendicular to the axis of impeller shaft (1);The blade portion (22) is connected to the outer side of connecting portion (21).

2. The impeller according to claim 1, wherein: The end of the impeller shaft (1) close to the end cover (3) is coaxially provided with a connecting groove (14);The end cover (3) is coaxially connected with a connecting column (31);The connecting column (31) is coaxially screwed into the connecting groove (14).

3. The impeller according to claim 2, wherein: The end of the end cover (3) close to the impeller shaft (1) is coaxially provided with a convex ring (32);The end of the connecting portion (21) close to the end cover (3) is provided with an embedded groove (211);The convex ring (32) is embedded in the embedded groove (211);The side wall of the convex ring (32) is fitted with the groove wall of the embedded groove (211).

4. The impeller according to claim 1, wherein: It also includes a positioning column (41) and a reset member (42);The groove bottom of the first limiting groove (13) is provided with a sliding groove (15);The positioning column (41) is slidably embedded in the sliding groove (15);The sliding direction of the positioning column (41) is perpendicular to the axial direction of the impeller shaft (1);The side away from the connecting portion (21) of the first limiting strip (23) is provided with a positioning groove (231);The positioning groove (231) is used for embedding the positioning column (41);The outer periphery of the positioning column (41) close to one end of the first limiting groove (13) is provided with a third round corner (411);The third round corner (411) is used for abutting with the groove wall of the positioning groove (231);The reset member (42) is connected between the impeller shaft (1) and the positioning column (41);The reset member (42) makes one end of the positioning column (41) have the tendency of extending into the first limiting groove (13).

5. The impeller according to claim 4, wherein: The sliding groove (15) is communicated with the transmission hole (11) at one end away from the first limiting groove (13); the other end of the positioning column (41) extends into the transmission hole (11); the first chamfer (412) is arranged at one end of the positioning column (41) close to the transmission hole (11); the first chamfer (412) is located at the side of the positioning column (41) away from the end cover (3); and the first chamfer (412) is used for abutting against the output shaft of the motor.

6. The impeller according to claim 5, wherein: One first limiting groove (13) corresponds to a plurality of sliding grooves (15); the plurality of sliding grooves (15) are distributed along the axis direction of the impeller shaft (1); the number of the positioning column (41), the reset member (42) and the positioning groove (231) is the same as and corresponds to the number of the sliding groove (15).

7. The impeller of claim 1, wherein: The second limiting strip (24) is connected to one side of the connecting part (21) close to the first limiting strip (23); the second limiting groove (16) is arranged in the groove bottom of the ring groove (12); the number of the second limiting groove (16) is the same as and corresponds to the number of the second limiting strip (24); one end of the second limiting groove (16) close to the end cover (3) penetrates the impeller shaft (1); the second limiting strip (24) is slidingly embedded in the second limiting groove (16); and the sliding direction of the second limiting strip (24) is parallel to the axis direction of the impeller shaft (1).

8. The impeller according to claim 7, wherein: The first limiting groove (13) is provided with the first round corner (17) at the groove wall of one end close to the end cover (3); and the second limiting groove (16) is provided with the second round corner (18) at the groove wall of one end close to the end cover (3).

9. The impeller of claim 1, wherein: The connecting part (21) is provided with the recess (212) at one side close to the groove bottom of the ring groove (12); the recess (212) is located at one side of the connecting part (21) along the circumferential direction of the connecting part (21); the connecting part (21) is connected with the protrusion (213) at the other side along the circumferential direction of the connecting part (21); the protrusion (213) is used for being embedded in the recess (212) of the adjacent connecting part (21); and the surface of the protrusion (213) away from the groove bottom of the ring groove (12) is attached to the groove wall of the recess (212).

10. The impeller of claim 1, wherein: The outer part of the end cover (3) close to one end of the impeller shaft (1) is flush with the outer wall of the connecting part (21); the end of the end cover (3) away from the impeller shaft (1) is gradually expanded towards the side close to the impeller shaft (1) along the axis direction of the impeller shaft (1); and the fourth round corner (33) is arranged at the end of the end cover (3) away from the impeller shaft (1).

Images