Search

CN-224228935-U - Impeller mounting structure and pump

CN224228935UCN 224228935 UCN224228935 UCN 224228935UCN-224228935-U

Abstract

The utility model provides an impeller mounting structure which comprises a motor base comprising a stator, a rotor, a mounting column fixed at the center of the motor base, a first through hole and a second through hole, wherein the rotor is coaxially fixed with an impeller group, the impeller group is mounted on the mounting column through a second bearing, the mounting column is provided with a blind hole, one end of the second bearing, which is far away from a first bearing, is provided with a front thrust ring, the front thrust ring is coaxially fixed on the mounting column, the inner wall surface of a shaft sleeve of the second bearing, which is close to the front thrust ring, is provided with an annular groove, the annular groove penetrates through one end, which is close to the front thrust ring, of the shaft sleeve of the second bearing, the front thrust ring, the mounting column and the groove wall of the annular groove enclose a cavity, and the first through hole is formed along the radial direction of the mounting column and communicates the cavity with the blind hole. The impeller mounting structure and the pump can buffer the axial force generated by the rotation of the impeller without a thrust washer.

Inventors

  • HUANG KUNQUAN

Assignees

  • 华工(江门)机电有限公司

Dates

Publication Date
20260512
Application Date
20250627

Claims (9)

  1. 1. The impeller mounting structure comprises a motor seat comprising a stator and a rotor driven by the stator, and is characterized by further comprising a mounting column fixed to the center of the motor seat, wherein the mounting column is coaxial with the stator, the rotor is coaxially mounted on the mounting column through a first bearing, an impeller set is coaxially fixed at one end of the rotor, which is far away from the motor seat, and is mounted on the mounting column through a second bearing, a blind hole is formed in one end of the mounting column, which is far away from the impeller set, and extends to the end face of the other end of the mounting column along the central axis of the mounting column, a front thrust ring is arranged at one end of the second bearing, which is far away from the first bearing, and is coaxially fixed to the mounting column, an annular groove is formed in the inner wall surface of a shaft sleeve, which is close to the front thrust ring, and penetrates through one end of the shaft sleeve, which is close to the front thrust ring, and a groove wall of the annular groove surrounds a synthetic cavity, and the blind hole extends to the first through hole and the first through hole is formed in the radial direction of the mounting column.
  2. 2. The impeller mounting structure according to claim 1, wherein a mounting sleeve is coaxially arranged at one end, close to the motor base, of the impeller set, the mounting column penetrates through the impeller set along the inside of the mounting sleeve, the mounting sleeve is coaxially mounted on the mounting column through the second bearing, a first embedding groove matched with the peripheral outline of the mounting sleeve is formed in the middle of one end, far away from the motor, of the rotor, a plurality of protruding blocks are arranged on the inner peripheral wall of the first embedding groove, and a second embedding groove matched with the protruding blocks is arranged at the corresponding position of the peripheral wall of the mounting sleeve.
  3. 3. The impeller mounting structure according to claim 2, wherein a guide sleeve is coaxially fixed to one end of the mounting sleeve away from the impeller assembly, the mounting post penetrates through the guide sleeve, a guide through hole is coaxially formed in the bottom of the first fitting groove, and the diameter of the guide through hole is equal to the outer diameter of the guide sleeve.
  4. 4. The impeller mounting structure according to claim 3, further comprising a second through hole formed along a radial direction of the mounting post, wherein the inner wall surface of the shaft sleeve of the first bearing and the inner wall surface of the shaft sleeve of the second bearing are respectively in communication with the blind hole through the corresponding second through holes.
  5. 5. The impeller mounting structure according to claim 1, characterized in that the groove wall of the annular groove is an inclined surface with a low inside and a high outside.
  6. 6. The impeller mounting structure of claim 1, wherein an end of the first bearing remote from the second bearing is provided with a rear thrust ring coaxially secured to the mounting post.
  7. 7. A pump comprising the impeller mounting structure according to any one of claims 1-6, further comprising a first housing, wherein the motor housing, the mounting post, and the impeller assembly are all located in the first housing, the impeller assembly, and the motor housing enclose a flow channel, the first housing is provided with a first liquid inlet and a first liquid outlet, and the first liquid inlet and the first liquid outlet are respectively communicated with the flow channel.
  8. 8. The pump of claim 7, further comprising a bottom plate provided with a threaded hole, wherein the motor base is fixedly mounted on the bottom plate, a rotatable screw is arranged at the position, corresponding to the threaded hole, of the outer wall of the first shell, the screw is matched with the threaded hole, a second liquid outlet is formed in the bottom plate, and the second liquid outlet is communicated with the first liquid outlet.
  9. 9. The pump of claim 8, further comprising a second housing coaxially disposed about the first housing, wherein one end of the second housing is fixedly mounted to the base plate, and wherein a second fluid inlet is formed in the other end of the housing, the second fluid inlet being in communication with the first fluid inlet.

Description

Impeller mounting structure and pump Technical Field The utility model relates to the field of liquid conveying devices, in particular to an impeller mounting structure and a pump. Background The axial force of the pump is generated by rotation, and may be caused by (1) the fluid pressure acting on the front and rear cover plates of the impeller are not balanced with each other, and an axial force is generated. (2) During the passage of the liquid through the impeller, an impulse, also called a dynamic counter force, is generated in the axial direction due to the change of the momentum of the liquid in the axial component. The problem of balancing the pump axial forces has become a key to the widespread use of pumps. At present, the axial force of the pump is mainly generated near the impeller, and in the prior art, the axial force of the pump is mainly relieved by a thrust washer in the pump, a thrust bearing and other mechanical devices, such as a thrust ring, and the impeller generating the axial force is limited through the thrust ring, so that the influence of the axial force generated by the impeller on the normal operation of the pump is avoided. The invention patent publication with the application number 202411564611.9 discloses a tightly connected permanent magnet direct-drive pump, the thrust ring comprises a front thrust ring and a rear thrust ring, the front end of an impeller is provided with a thrust washer, the front thrust ring is coupled and linked with the thrust washer, and the front thrust ring is arranged on a concave ring which is close to a liquid inlet in an inner cavity of a front cover, so that the axial force resistance of the impeller is improved. The axial force resisting structure depends on buffering of the thrust washer, has high requirement on the wear resistance of the thrust washer, and is used for checking the wear condition of the thrust washer at regular time. In a pump in which a center shaft does not rotate, an impeller bearing is mounted on the center shaft and rotates synchronously with a rotor, in this case, if a thrust washer fails, a bearing sleeve rotating synchronously with the impeller applies force in an axial direction, which not only affects extrusion with a thrust ring, but also rotates relative to the thrust ring, causing abrasion and seriously affecting normal operation of the impeller, and therefore, there is a need for an impeller mounting structure and a pump capable of buffering the axial force. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide an impeller mounting structure capable of buffering axial force. The impeller mounting structure comprises a motor seat comprising a stator, a rotor driven by the stator, a mounting column fixed at the center of the motor seat, wherein the mounting column is coaxial with the stator, the rotor is coaxially mounted on the mounting column through a first bearing, an impeller group is coaxially fixed at one end of the rotor far away from the motor seat, the impeller group is mounted on the mounting column through a second bearing, a blind hole is formed in one end of the mounting column far away from the impeller group, the blind hole extends to the end face of the other end of the mounting column along the central axis of the mounting column, a front thrust ring is arranged at one end of the second bearing far away from the first bearing, the front thrust ring is coaxially fixed on the mounting column, an annular groove is formed in the inner wall face of a shaft sleeve of the second bearing close to the front thrust ring, the annular groove penetrates through one end of the shaft sleeve of the second bearing, the front thrust ring, the mounting column and the annular groove enclose a cavity, and the blind hole is communicated with the groove wall of the blind hole along the radial direction of the mounting column. Preferably, one end of the impeller group, which is close to the motor seat, is coaxially provided with a mounting sleeve, the mounting column penetrates through the impeller group along the inside of the mounting sleeve, the mounting sleeve is coaxially mounted on the mounting column through a second bearing, a first embedding groove matched with the peripheral outline of the mounting sleeve is formed in the middle of one end, far away from the motor, of the rotor, a plurality of protruding blocks are arranged on the inner peripheral wall of the first embedding groove, and a second embedding groove matched with the protruding blocks is formed in the corresponding position of the outer peripheral wall of the mounting sleeve. Preferably, one end of the mounting sleeve, which is far away from the impeller set, is coaxially fixed with a guide sleeve, the mounting column penetrates through the guide sleeve, the bottom of the first jogging groove is coaxially provided with a guide through hole, and the diameter of the guide through hole is equal to the