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CN-121976948-A - Mechanical seal self-flushing structure for pump and rotor pump

CN121976948ACN 121976948 ACN121976948 ACN 121976948ACN-121976948-A

Abstract

The utility model provides a mechanical seal is from washing structure for pump, including pump chamber, rotating ring and quiet ring, the pump chamber sets up the shaft hole, rotating ring and quiet ring are installed in shaft hole one side in order to form sealed mill face, sealed mill face periphery sets up annular runner, the bottom surface of pump chamber sets up first communication hole and the second intercommunicating pore that are located the shaft hole both sides, and first communication hole is located the feed side of pump chamber, the second intercommunicating pore is located the discharge side of pump chamber, the feed side of pump chamber, first communication hole, annular runner, the second intercommunicating pore, the discharge side of pump chamber communicates in proper order and constitutes the washing runner, this structure and pump chamber intercommunication and utilize the material of being carried to wash, just so need not to provide the flushing fluid through the washing pipeline and wash, still propose a rotor pump, adopt aforementioned from washing structure.

Inventors

  • NIE RUGUO

Assignees

  • 宁波得利时泵业有限公司

Dates

Publication Date
20260505
Application Date
20260213
Priority Date
20250926

Claims (12)

  1. 1. A mechanical seal is from washing structure for pump, including pump chamber (1), rotating ring (2) and quiet ring (3), pump chamber (1) sets up shaft hole (4), rotating ring (2) and quiet ring (3) are installed in shaft hole (4) one side in order to form sealed mill face (5), a serial communication port, sealed mill face (5) periphery sets up annular runner (6), the bottom surface of pump chamber (1) sets up first communication hole (7) and second intercommunicating pore (8) that are located shaft hole (4) both sides, and first communication hole (7) are located feed side (9) of pump chamber (1), second intercommunicating pore (8) are located discharge side (10) of pump chamber (1), feed side (9) of pump chamber (1), first communication hole (7), annular runner (6), second intercommunicating pore (8), discharge side (10) of pump chamber (1) constitute the washing runner in proper order.
  2. 2. A mechanical seal self-flushing structure for a pump according to claim 1, characterized in that the first communication hole (7) is connected with a first material guide groove (11) provided on the bottom surface, and the second communication hole (8) is connected with a second material guide groove (12) provided on the bottom surface.
  3. 3. A mechanical seal self-flushing structure for a pump according to claim 2, characterized in that the end of the first material guiding channel (11) remote from the first communication hole (7) is located on the inlet side of the feed side (9), and the end of the second material guiding channel (12) remote from the second communication hole (8) is located on the outlet side of the discharge side (10).
  4. 4. A mechanical seal self-flushing structure for a pump as claimed in claim 3, characterized in that the other end of the first material guide groove (11) is provided with a first communication hole (7), and the other end of the second material guide groove (12) is provided with a second communication hole (8).
  5. 5. A mechanical seal self-flushing structure for a pump according to claim 3, characterized in that the inlet side is provided with a feed inlet (13), the outlet side is provided with a discharge outlet (14), the feed inlet (13) and the discharge outlet (14) are both provided with concave cambered surfaces (15), one end of the first material guide groove (11) extends to the inner side of the concave cambered surface (15) of the feed inlet (13), and one end of the second material guide groove (12) extends to the inner side of the concave cambered surface (15) of the discharge outlet (14).
  6. 6. A self-flushing arrangement for a mechanical seal of a pump according to claim 2 or 3 or 4 or 5, characterized in that the first material guiding channel (11) and the second material guiding channel (12) are both straight channels.
  7. 7. The mechanical seal self-flushing structure for a pump according to claim 6, characterized in that the shaft holes (4) are arranged in two vertically distributed, the pump cavity (1) is provided with a feed inlet (13) and two first material guide grooves (11) on the left side of the two shaft holes (4), the feed inlet (13) is arranged centrally relative to the two shaft holes (4), the two first material guide grooves (11) are arranged in a splayed manner, the pump cavity (1) is provided with a discharge outlet (14) and two second material guide grooves (12) on the right side of the two shaft holes (4), the discharge outlet (14) is arranged centrally relative to the two shaft holes (4), and the two second material guide grooves (12) are arranged in an inverted splayed manner.
  8. 8. The mechanical seal self-flushing structure for a pump according to claim 2, wherein the shaft holes (4) are arranged as two vertically distributed, the pump cavity (1) is provided with a feed inlet (13) and one or more first material guide grooves (11) on the left side of the two shaft holes (4), the feed inlet (13) is arranged centrally relative to the two shaft holes (4), two ends of the first material guide grooves (11) are respectively communicated with a first communication hole (7) corresponding to the corresponding shaft hole (4), the pump cavity (1) is provided with a discharge hole (14) and one or more second material guide grooves (12) on the right side of the two shaft holes (4), the discharge hole (14) is arranged centrally relative to the two shaft holes (4), and two ends of the second material guide grooves (12) are respectively communicated with a second communication hole (8) corresponding to the corresponding shaft hole (4).
  9. 9. The self-flushing structure for mechanical seal of pump according to claim 8, characterized in that the axes of the first material guiding groove (11) and the feed opening (13) are arranged in a mutually perpendicular distribution, and/or the axes of the second material guiding groove (12) and the discharge opening (14) are arranged in a mutually perpendicular distribution.
  10. 10. A self-flushing structure for a mechanical seal of a pump according to claim 1 or 2 or 8 or 9, characterized in that the first communication holes (7) are arranged one or more circumferentially around the respective shaft hole (4) and/or the second communication holes (8) are arranged one or more circumferentially around the respective shaft hole (4).
  11. 11. A rotor pump, set up rotor (19) in pump chamber (1), rotor (19) connect pivot (20), and mechanical seal (21) are installed in pivot (20), and mechanical seal (21) provide sealed mill face (5) and realize sealedly, characterized in that still includes the mechanical seal self-flushing structure for pump of any one of claims 1 to 10.
  12. 12. A mechanical seal self-flushing arrangement for a pump according to claim 11, characterised in that the rotor (19) sweeps over the first material channel (11), the second material channel (12) when rotated.

Description

Mechanical seal self-flushing structure for pump and rotor pump Technical Field The invention relates to the technical field of mechanical sealing devices, in particular to a mechanical sealing self-flushing structure for a pump and a rotor pump. Background The mechanical seal is constructed by a sealing grinding surface formed by a static ring and a dynamic ring, so that the problems of certain friction heat generation, material adhesion and the like exist, and a flushing structure is designed for improving the working state of the sealing grinding surface. In the prior art, a flushing structure such as a mechanical seal device disclosed in an authorized publication number CN100406790C is disclosed, which comprises a mounting member provided on the outer surface of the device body and having an inner peripheral surface through which the shaft is fitted and having a flushing hole penetrating through the inner peripheral surface, a1 st seal ring slidably fitted to the inner peripheral surface of the mounting member and having a seal surface at the outer front end pressed by a spring means, a2 nd seal ring having an opposite seal surface in close contact with the seal surface of the 1 st seal ring, and a seal collar for holding and fixing the 2 nd seal ring to the shaft, wherein a gap through which a fluid to be sealed can flow is provided between the 1 st seal ring and the shaft, and the flushing hole communicates with the vicinity of the inner periphery of the seal surface through the gap. That is, the flushing hole is externally connected with a flushing pipeline to be filled with flushing liquid, and the flushing liquid reaches the inner peripheral surface of the sealing grinding surface through a gap, so that the flushing structure is common, such as a single-end-face mechanical sealing device disclosed by an authorized publication number CN216555364U, a shaft sealing device of a rotating machine disclosed by an authorized publication number CN2470586Y, and the like. Another technical route is to connect a flushing pipe to the flushing hole to introduce a flushing liquid, and the flushing liquid reaches the peripheral surface of the sealed grinding surface through a flow channel, for example, an efficient circulating cooling device for mechanical sealing is disclosed in an authorized publication number CN 109058465B. Still another technical route is to further add additives, for example, CN113217477B discloses a mechanical seal self-flushing device for a pump based on marangoni effect, which comprises a main flushing chamber and an auxiliary flushing chamber arranged at both sides of the mechanical seal, and a flushing pipeline system, wherein the flushing pipeline system comprises an inlet flushing pipeline connected with the main flushing chamber, an auxiliary flushing pipeline connected with the auxiliary flushing chamber, and a flushing outlet pipeline, the inlet flushing pipeline is used for injecting an additive I capable of increasing the surface tension of a process fluid into the main flushing chamber, the auxiliary flushing pipeline is used for injecting an additive II capable of reducing the surface tension of a medium and adsorbing solid particles into the auxiliary flushing chamber, a surface tension gradient is generated at the axial gap of the end face of the mechanical seal, and tiny particles deposited on the end face and carried in a liquid film in the axial gap of the mechanical seal are flushed out by using marangoni effect. The invention has simple structure, is economical and energy-saving, effectively removes impurities in the mechanical seal gap, greatly reduces the abrasion of the mechanical seal end face and prolongs the service life. From the foregoing, it has long been a conventional idea of a flushing structure that requires a flushing liquid to be supplied through a flushing line for flushing, and the present inventors have proposed a mechanical seal self-flushing structure for a pump that communicates with a pump chamber and that uses a conveyed material for flushing, so that the flushing liquid does not need to be supplied through the flushing line for flushing. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a mechanical seal self-flushing structure for a pump, which is communicated with a pump cavity and is flushed by conveyed materials, so that flushing liquid does not need to be provided through a flushing pipeline for flushing, and a rotor pump adopting the self-flushing structure. Compared with the prior art, the invention provides a mechanical seal self-flushing structure for a pump, which comprises a pump cavity, a movable ring and a stationary ring, wherein the pump cavity is provided with a shaft hole, the movable ring and the stationary ring are arranged on one side of the shaft hole to form a seal grinding surface, the periphery of the seal grinding surface is provided with an annular flow passage, the bottom su