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CN-224228957-U - Flushing system of heat medium pump and heat medium pump

CN224228957UCN 224228957 UCN224228957 UCN 224228957UCN-224228957-U

Abstract

The utility model discloses a flushing system of a heat medium pump and the heat medium pump, which comprise a liquid supply source, a flushing pore canal, a flushing cooling groove and a flushing cooling groove, wherein the flushing pore canal is arranged on a pump cover, a backflow hole is a balance hole arranged on an impeller, the flushing cooling groove is arranged on the inner surface of a sliding bearing and is provided with a first end close to the impeller and a second end far away from the impeller, pressurized fluid output by the liquid supply source can flow into the second end of the flushing cooling groove through the flushing pore canal, and after flowing through the flushing cooling groove, the fluid returns to the liquid supply source from the first end of the flushing cooling groove through the balance hole. The utility model can effectively improve the flushing flow of the sliding bearing, quickly take away the friction heat, prevent the excessive temperature rise, ensure the hydraulic efficiency of the heat medium pump, and improve the overall operation stability and the service life of the heat medium pump.

Inventors

  • SUN XINKAI
  • XU CHUANHUI
  • ZHOU HUAN
  • JI XIAOLI

Assignees

  • 苏州苏尔寿泵业有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (12)

  1. 1. A flushing system for a heat medium pump, the flushing system comprising: a liquid supply source; A flushing port, the flushing port being disposed on the pump cap; the backflow hole is a balance hole arranged on the impeller; a rinse cooling groove disposed on an inner surface of the slide bearing, the rinse cooling groove having a first end proximate the impeller and a second end facing away from the impeller; The pressurized fluid output by the fluid supply source can flow into the second end of the flushing cooling tank through the flushing pore canal, and after flowing through the flushing cooling tank, the pressurized fluid returns to the fluid supply source from the first end of the flushing cooling tank through the balance hole.
  2. 2. The heat medium pump flushing system of claim 1, wherein the slide bearing comprises a bushing, the slide bearing is sleeved on a pump shaft, the pump shaft extends along a horizontal direction, a cross section of the bushing is perpendicular to an axis direction of the pump shaft, and the flushing cooling groove is arranged at the top of an inner surface of the bushing.
  3. 3. The heat medium pump flushing system according to claim 2, wherein the flushing cooling tank is a through groove formed in the topmost portion of the inner surface of the liner and having a circular arc-shaped cross section, and a central angle corresponding to the circular arc of the flushing cooling tank is within 40 °.
  4. 4. A flushing system of a heat medium pump as set forth in claim 3, wherein the circular arc of the flushing cooling tank corresponds to a central angle of between 8 ° and 40 °.
  5. 5. A flushing system for a heat medium pump as set forth in claim 3, wherein a maximum groove depth of said flushing cooling groove is between 1mm and 4mm, and a circular arc radius of said flushing cooling groove is between 2mm and 16mm.
  6. 6. A flushing system for a heat pump as set forth in any one of claims 1 to 5, wherein the diameter of said balance holes is between 4mm and 8mm, the number of said balance holes is plural, and the plural balance holes are uniformly spaced apart in the circumferential direction.
  7. 7. The heat pump flushing system of claim 6, wherein the number of balance holes is 5 to 8.
  8. 8. A flushing system for a heat medium pump as set forth in any one of claims 1 to 5, wherein the minimum pore diameter of the flushing port is between 4mm and 10 mm.
  9. 9. The heat pump flushing system of claim 8, wherein the fluid supply includes a pump body having pressurized fluid flowing therethrough; The washing pore canal comprises an inlet end and an outlet end, the flow section of the inlet end is larger than that of the outlet end, the inlet end of the washing pore canal is positioned in the pump body, the outlet end of the washing pore canal is communicated to the second end of the washing cooling groove, the pump body, the washing pore canal, the washing cooling groove and the balance hole are sequentially communicated to form a circulating washing cooling flow passage, and the washing flow in the circulating washing cooling flow passage is between 5L/min and 30L/min.
  10. 10. The system for flushing a heat pump according to claim 8, The liquid supply source comprises a pump body, an inlet and an outlet are arranged on the pump body, and pressurized liquid flows in the pump body; The flushing duct comprises an inlet end and an outlet end, the flow section of the inlet end is larger than that of the outlet end, the inlet end of the flushing duct is located outside the pump body, the outlet end of the flushing duct is communicated to the second end of the flushing cooling groove, a pump outlet is arranged on the pump body, the flushing system of the heat medium pump further comprises a flushing pipe, one end of the flushing pipe is connected with the pump outlet, the other end of the flushing pipe is connected with the inlet end of the flushing duct, the pump body, the flushing pipe, the flushing duct, the flushing cooling groove and the balance hole are sequentially communicated to form a circulating flushing cooling flow passage, and the flushing flow in the circulating flushing cooling flow passage is between 5L/min and 30L/min.
  11. 11. The system of any one of claims 2 to 5, wherein the sliding bearing comprises a sleeve and a bush, the sleeve and the bush are sequentially sleeved on the periphery of the pump shaft, the outer side wall of the sleeve is matched with a flushing cooling groove of the bush to form a flushing structure for flushing and cooling the sliding bearing, or the sliding bearing comprises a bush, the bush is directly sleeved on the periphery of the pump shaft, and the side wall of the pump shaft is matched with the flushing cooling groove of the bush to form a flushing structure for flushing and cooling the sliding bearing.
  12. 12. A heat medium pump, characterized in that the heat medium pump comprises a flushing system of the heat medium pump according to any one of claims 1 to 11.

Description

Flushing system of heat medium pump and heat medium pump Technical Field The utility model relates to the field of heat medium pump equipment, in particular to a flushing system of a heat medium pump and the heat medium pump. Background The heat medium pump is used as a core fluid machine for conveying high-temperature heat medium (such as hot oil and hot water), is widely applied to the industrial fields of petrochemical industry, electric power, metallurgy and the like, and the running stability and reliability of the heat medium pump directly determine the continuous operation capacity of the whole process system. The sliding bearing is a key supporting component of the rotor system of the heat medium pump, and plays a decisive role in the stable and reliable operation of the heat medium pump. The sliding bearings are lubricated by means of a pumped medium. In practical industrial application, the working condition of the heat medium pump is complex and changeable, when the viscosity of the pumped medium is low, a large error exists in pump body assembly, or the heat medium pump runs in a high-load and high-temperature environment for a long time, the sliding bearing is difficult to maintain an ideal lubrication state, and a dry friction phenomenon is unavoidable. The occurrence of dry friction can lead to the generation of great friction power consumption on the working surface of the sliding bearing, further cause the rapid rise of the medium temperature, further cause the thermal deformation of the related parts of the pump body due to the rise of the temperature, and simultaneously lead to the rapid reduction of the viscosity of the lubricating medium, so that the bearing capacity of a liquid film is greatly reduced, and the medium vaporization phenomenon can occur under extreme conditions. The problems can form vicious circle, finally lead to the lubrication film of the sliding bearing to be broken, cause the problems of pump body vibration, noise exceeding standard and the like, and also can cause the sliding bearing to be ablated and the rotor to be stuck when serious, directly lead to the shutdown of the heat medium pump, and even lead to the cascading failure of a subsequent process system. Therefore, there is a need for a flushing system for a heat medium pump and a heat medium pump, which solve at least one of the above problems. It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section. Disclosure of utility model Aiming at the defects existing in the prior art, the embodiment of the utility model provides a flushing system of a heat medium pump and the heat medium pump, which can effectively improve the flushing flow of a sliding bearing, rapidly take away friction heat, prevent excessive temperature rise, ensure the hydraulic efficiency of the heat medium pump, and improve the overall operation stability and the service life of the heat medium pump. The specific technical scheme of the embodiment of the utility model is as follows: A flushing system of a heat medium pump comprises a liquid supply source, a flushing pore canal, a flushing cooling groove and a flushing cooling groove, wherein the flushing pore canal is arranged on a pump cover, a backflow hole is a balance hole arranged on an impeller, the flushing cooling groove is arranged on the inner surface of a sliding bearing and is provided with a first end close to the impeller and a second end far away from the impeller, pressurized fluid output by the liquid supply source can flow into the second end of the flushing cooling groove through the flushing pore canal, and after flowing through the flushing cooling groove, the fluid returns to the liquid supply source from the first end of the flushing cooling groove through the balance hole. In a preferred embodiment, the sliding bearing comprises a bushing, the sliding bearing is sleeved on a pump shaft, the pump shaft extends along a horizontal direction, the cross section of the bushing is perpendicular to the axial direction of the pump shaft, and the flushing cooling groove is formed in the top of the inner surface of the bushing. In a preferred embodiment, the flushing cooling groove is a through groove with a circular arc-shaped cross section formed at the top of the inner surface of the bushing, and the central angle corresponding to the circular arc of the flushing cooling groove is within 40 degrees. In a preferred embodiment, the circular arc of the flushing cooling tank corresponds to a central angle of between 8 ° and 40 °. In a preferred embodiment, the maximum groove depth of the flushi