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CN-122014635-A - Internal circulation submersible pump

CN122014635ACN 122014635 ACN122014635 ACN 122014635ACN-122014635-A

Abstract

The application relates to an internal circulation submersible pump, which comprises a motor shell, a front bearing seat and a rear bearing seat which are respectively arranged at two ends of the motor shell, wherein a stator and a rotor are arranged in the motor shell, a driving shaft is arranged on the rotor, two ends of the driving shaft are respectively rotatably arranged on the front bearing seat and the rear bearing seat, a cooling circulation shell is arranged on the front bearing seat and positioned outside the motor shell, a backflow mounting seat is arranged on the front bearing seat, a cooling circulation flow passage is formed between the cooling circulation shell and the backflow mounting seat, the driving shaft penetrates through the front bearing seat and stretches into the backflow mounting seat, a circulation impeller is arranged in the backflow mounting seat by the driving shaft, a liquid accumulation cavity is arranged in the front bearing seat and used for communicating a connecting part of the front bearing seat and the driving shaft, an opening of the liquid accumulation cavity is positioned on a side wall surface of the front bearing seat, and a drain flange for sealing the opening of the liquid accumulation cavity is arranged on the front bearing seat. The application has the effect of reducing the maintenance period duration.

Inventors

  • LIU JIANG
  • YU HEFENG
  • YING RONGJUN
  • LIN RONG
  • JIANG YI

Assignees

  • 利欧集团浙江泵业有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. The utility model provides an internal circulation immersible pump, includes motor (1), cooling cycle shell (2) and backward flow mount pad (3), motor (1) include motor housing (101), and set up respectively front bearing frame (102) and back bearing frame (103) at motor housing (101) both ends, have stator (105) and rotor (106) in motor housing (101), be provided with drive shaft (107) on rotor (106), the both ends of drive shaft (107) are installed in rotation respectively front bearing frame (102) and back bearing frame (103); The cooling circulation shell (2) is arranged on the front bearing seat (102) and is positioned outside the motor shell (101), the backflow installation seat (3) is arranged on the front bearing seat (102), a cooling circulation flow channel is formed between the cooling circulation shell (2) and the backflow installation seat (3), the driving shaft (107) penetrates through the front bearing seat (102) and then stretches into the backflow installation seat (3), and the driving shaft (107) is provided with a circulation impeller (4) in the backflow installation seat (3); The hydraulic pump is characterized in that a hydraulic cavity (111) is arranged in the front bearing seat (102), the hydraulic cavity (111) is used for being communicated with the joint of the front bearing seat (102) and the driving shaft (107), an opening of the hydraulic cavity (111) is positioned on the side wall surface of the front bearing seat (102), and a drain flange (112) for sealing the opening of the hydraulic cavity (111) is arranged on the front bearing seat (102).
  2. 2. An internal circulation submersible pump according to claim 1, characterized in that a mounting cavity (114) is arranged in the middle of the front bearing seat (102), a front bearing (115) connected with the driving shaft (107) is arranged in the mounting cavity (114), a shaft through hole (117) for the driving shaft (107) to pass through is arranged on the bottom surface of the mounting cavity (114), an internal mechanical seal (110) connected with the driving shaft (107) is arranged around the shaft through hole (117) of the front bearing seat (102), and the effusion cavity (111) is communicated with the mounting cavity (114).
  3. 3. An internal circulation submersible pump according to claim 2, characterized in that an isolation chamber (118) is formed between the bottom surface of the mounting chamber (114) and the front bearing (115), and the front bearing housing (102) is provided with a communication port (119) communicating with the liquid accumulation chamber (111) at the position of the isolation chamber (118).
  4. 4. An internal circulation submersible pump according to claim 3, characterized in that the liquid accumulation chamber (111) has a lower floor level than the mounting chamber (114).
  5. 5. An internal circulation submersible pump according to claim 3, characterized in that the bottom surface of the liquid accumulation chamber (111) is provided with a liquid storage tank (120).
  6. 6. An internal circulation submersible pump according to claim 5, characterized in that a first arc-shaped surface (121) is arranged between the notch of the liquid storage tank (120) and the communication port (119), second arc-shaped surfaces (122) are arranged on two sides of the bottom surface of the liquid accumulation cavity (111), and the first arc-shaped surface (121) and the second arc-shaped surface (122) are connected with the notch of the liquid storage tank (120).
  7. 7. An internal circulation submersible pump according to claim 1, characterized in that a water leakage probe (123) is arranged on the front bearing seat (102), and the detection end of the water leakage probe (123) extends into the effusion chamber (111).
  8. 8. An internal circulation submersible pump according to claim 1, characterized in that the front bearing block (102) is provided with a liquid collecting port (6) for communicating the interior of the motor housing (101) with the liquid accumulating cavity (111).
  9. 9. An internal circulation submersible pump according to claim 1, characterized in that the cooling circulation housing (2) comprises a guide inner cylinder (201) and a cooling housing (202), the guide inner cylinder (201) being mounted on the front bearing block (102) and being located outside the motor housing (101), a guide chamber (203) being formed between the guide inner cylinder (201) and the motor housing (101), the cooling housing (202) being mounted on the front bearing block (102) and being located outside the guide inner cylinder (201), a cooling chamber (204) being formed between the cooling housing (202) and the guide inner cylinder (201), the cooling chamber (204) being in communication with the guide chamber (203); The front bearing seat (102) is provided with a diversion hole (108) and a backflow hole (109), a medium backflow cavity (5) is arranged in the backflow mounting seat (3), the diversion hole (108) is used for communicating the diversion cavity (203) with the medium backflow cavity (5), and the backflow hole (109) is used for communicating the cooling cavity (204) with the medium backflow cavity (5).
  10. 10. An internal circulation submersible pump according to claim 9, characterized in that the return mount (3) comprises a pump cover (301) and a separator (302); The pump cover (301) is installed on the front bearing seat (102), the separation body (302) is arranged in the pump cover (301), a medium backflow channel (501) is formed between the separation body (302) and the pump cover (301), a medium diversion channel (502) is formed in the separation body (302), the medium diversion channel (502) is communicated with the medium backflow channel (501), the medium diversion channel (502) is communicated with the diversion chamber (203) through the diversion hole (108), the medium backflow channel (501) is communicated with the cooling chamber (204) through the backflow hole (109), and the circulating impeller (4) is arranged at the communication position of the medium diversion channel (502) and the medium backflow channel (501).

Description

Internal circulation submersible pump Technical Field The application relates to the technical field of submersible pumps, in particular to an internal circulation submersible pump. Background The submersible sewage pump mainly radiates heat to the motor through external circulating tap water, but when the medium particles are more or the medium is thicker, the submersible sewage pump runs for a long time, the water inlet and outlet channels of the circulating tap water can be blocked, and the water quantity of the medium water and the heat radiation effect of the motor can be influenced. The current China patent with the application number 2024117706364 discloses a water pump cooling structure and a sewage pump, the water pump cooling structure comprises a motor casing, a guide cover and a cooling spacer bush, the cooling spacer bush is arranged on the outer wall of the motor casing, a cooling cavity is formed between the cooling spacer bush and the motor casing, a plurality of backflow holes and a plurality of guide holes are alternately formed in the motor casing at intervals, the backflow holes and the guide holes are positioned at the bottom of the cooling cavity, the guide cover is arranged on the motor casing, a guide channel is formed between the guide cover and the motor casing, and the guide holes are positioned in the guide channel. The bottom of motor casing has seted up the medium backward flow chamber, the backward flow hole with the water conservancy diversion hole both is connected with the medium backward flow chamber, and the medium backward flow intracavity is provided with the impeller to and make cooling medium can follow the backward flow hole flow direction the water conservancy diversion hole. For the above related art, the inventor found that the motor casing is divided into an upper casing and a lower casing, the lower casing is provided with an inner seal for assembling a driving shaft of the motor, wherein when the inner seal fails, a cooling medium easily enters into the motor sealing cavity through the inner seal, and when the cooling medium in the motor sealing cavity needs to be discharged, the whole seal needs to be removed and overhauled, which results in a longer overhauling period, so that a certain improvement exists. Disclosure of Invention In order to reduce the maintenance period duration, the application provides an internal circulation submersible pump. The application provides an internal circulation submersible pump which adopts the following technical scheme: The inner circulation submersible pump comprises a motor, a cooling circulation shell and a backflow mounting seat, wherein the motor comprises a motor shell, a front bearing seat and a rear bearing seat which are respectively arranged at two ends of the motor shell, a stator and a rotor are arranged in the motor shell, a driving shaft is arranged on the rotor, and two ends of the driving shaft are respectively rotatably arranged on the front bearing seat and the rear bearing seat; The cooling circulation shell is arranged on the front bearing seat and is positioned outside the motor shell, the backflow installation seat is arranged on the front bearing seat, a cooling circulation flow channel is formed between the cooling circulation shell and the backflow installation seat, the driving shaft penetrates through the front bearing seat and then stretches into the backflow installation seat, and the driving shaft is provided with a circulation impeller in the backflow installation seat; The hydraulic pump is characterized in that a hydraulic cavity is arranged in the front bearing seat and is used for communicating the joint of the front bearing seat and the driving shaft, an opening of the hydraulic cavity is positioned on the side wall surface of the front bearing seat, and a drain flange for sealing the opening of the hydraulic cavity is arranged on the front bearing seat. Preferably, an installation cavity is formed in the middle of the front bearing seat, a front bearing connected with the driving shaft is arranged in the installation cavity, a shaft through hole for the driving shaft to pass through is formed in the bottom surface of the installation cavity, an inner machine seal connected with the driving shaft is arranged around the shaft through hole by the front bearing seat, and the effusion cavity is communicated with the installation cavity. Preferably, an isolation cavity is formed between the bottom surface of the installation cavity and the front bearing, and a communication port communicated with the effusion cavity is formed in the position of the isolation cavity on the front bearing seat. Preferably, the height of the bottom surface of the effusion cavity is lower than that of the bottom surface of the installation cavity. Preferably, a liquid storage tank is arranged on the bottom surface of the liquid accumulation cavity. Preferably, a first arc-shaped surface is arranged between the notc