Search

CN-224228855-U - Side flow pipe of multistage sliding vane pump

CN224228855UCN 224228855 UCN224228855 UCN 224228855UCN-224228855-U

Abstract

The utility model provides a side flow pipe of a multistage sliding vane pump, which comprises a plurality of pump bodies which are detachably connected with each other, wherein each pump body comprises a first-stage pump body, at least one middle-stage pump body and a last-stage pump body which are sequentially connected, the first-stage pump body, the at least one middle-stage pump body and the last-stage pump body are mutually independent and are respectively assembled and comprise a rotor provided with sliding vanes, an eccentric part is sleeved outside the rotor, the inner wall of the eccentric part and the rotor are eccentrically arranged to form an eccentric cavity, a grading pump shell is wrapped outside the eccentric part, an annular pump cavity is formed between the grading pump shell and the eccentric part, the eccentric part is provided with a plurality of distributing holes which are communicated with the pump cavity and the eccentric cavity, the outer parts of adjacent pump bodies are provided with side flow pipes, the side flow pipes are respectively communicated with the pump cavities of the adjacent pump bodies, the flow area of the side flow pipes is far greater than the inter-stage holes, the local resistance of fluid transmission is reduced, the transmission efficiency is improved, the fluid does not directly wash the inner wall of the pump shell, the damage of the axial thrust to the pump body connection is avoided, the service life of the pump body is prolonged, the bent part of the side flow pipe realizes smooth fluid steering, the kinetic energy loss is reduced, and the whole energy consumption is reduced.

Inventors

  • WANG QIANYI

Assignees

  • 哈尔滨凯泉泵业有限公司

Dates

Publication Date
20260512
Application Date
20250623

Claims (10)

  1. 1. The side flow pipe of the multistage sliding vane pump is characterized by comprising a plurality of pump bodies which are mutually detachably connected, wherein each pump body comprises a first-stage pump body (1), at least one middle-stage pump body (2) and a last-stage pump body (3) which are sequentially connected, linear adjustment of output pressure is realized by increasing or decreasing the number of the middle-stage pump bodies (2), the first-stage pump body (1) is provided with a pump outlet (11), and the last-stage pump body (3) is provided with a pump inlet (31); The novel pump comprises a first-stage pump body (1), a middle-stage pump body (2) and a last-stage pump body (3), wherein the first-stage pump body, the middle-stage pump body and the last-stage pump body (3) are mutually independent and are respectively assembled with a rotor (4) comprising a sliding sheet (41), an eccentric part (5) is sleeved outside the rotor (4), the inner wall of the eccentric part (5) and the rotor (4) are eccentrically arranged to form an eccentric cavity (51), a grading pump shell (6) is wrapped outside the eccentric part (5), an annular pump cavity (61) is formed between the grading pump shell (6) and the eccentric part (5), a plurality of distributing holes (52) which are communicated with the pump cavity (61) and the eccentric cavity (51) are formed in the eccentric part (5), pump shafts (7) which extend outwards are respectively arranged at two axial ends of the rotor (4), and adjacent pump shafts (7) are axially detachably connected; The pump body is characterized in that a lateral flow pipe (8) is arranged outside the adjacent pump body, the lateral flow pipes (8) are respectively communicated with the pump cavities (61) of the adjacent pump bodies, and pressurized fluid in the pump bodies is transmitted to the adjacent next-stage pump bodies through the lateral flow pipes (8).
  2. 2. The side flow pipe of the multistage sliding vane pump according to claim 1, characterized in that the side flow pipe (8) is provided with two bending parts (81), a advection part (82) is arranged between the two bending parts (81), one end of the bending part (81) is communicated with a pump cavity (61) of the pump body, and the other end is communicated with the advection part (82).
  3. 3. The side flow pipe of the multistage sliding vane pump according to claim 2, wherein the bending part (81) has an arc-shaped structure for smooth transition of fluid, and the diameter of the advection part (82) is uniform.
  4. 4. The side flow pipe of the multistage sliding vane pump according to claim 2, characterized in that one or two through holes (62) are arranged on the stage pump shell (6) of the pump body, and the through holes (62) are respectively communicated with the pump cavity (61) and one end of the bending part (81) of the side flow pipe (8).
  5. 5. Side flow tube of a multistage sliding vane pump according to claim 4, characterized in that the intermediate pump body (2) is provided with two through holes (62) symmetrically arranged in radial direction.
  6. 6. The side flow pipe of the multistage sliding vane pump according to claim 5, characterized in that the through hole (62) is provided with a first installation position (621), one end of the bending part (81) of the side flow pipe (8) is provided with a second installation position (811) corresponding to the first installation position (621), and the first installation position (621) and the second installation position (811) are fixedly connected in a sealing manner through bolts (83).
  7. 7. The side flow tube of a multistage sliding vane pump according to claim 4, characterized in that the eccentric (5) is provided with two sets of said flow-distributing holes (52), the two sets of said flow-distributing holes (52) being symmetrically arranged in the radial direction on the peripheral wall of the eccentric (5).
  8. 8. The side flow tube of a multistage sliding vane pump according to claim 7, characterized in that the through hole (62) is provided coaxially corresponding to the flow distribution hole (52), reducing fluid energy loss.
  9. 9. A side flow tube of a multistage sliding vane pump according to claim 1, characterized in that one of the pump shafts (7) connected adjacently is provided with an outwardly extending projection (71), the other is provided with an inwardly recessed groove (72), the projection (71) and the groove (72) are arranged in a snap-fit manner.
  10. 10. The side flow pipe of the multistage sliding vane pump according to claim 1, wherein a front pump cover (12) is arranged at one end of the first stage pump body (1) far away from the middle stage pump body (2), a rear pump cover (32) is arranged at one end of the last stage pump body (3) far away from the middle stage pump body (2), a plurality of fixing rods (9) are fixedly connected between the front pump cover (12) and the rear pump cover (32) through threads, and the fixing rods form a rigid frame for resisting axial hydraulic pressure.

Description

Side flow pipe of multistage sliding vane pump Technical Field The utility model belongs to the technical field of sliding vane pumps, and particularly relates to a side flow pipe of a multistage sliding vane pump. Background Conventional multistage sliding vane pumps typically employ built-in inter-stage orifices to effect fluid transfer between adjacent pumping chambers. The design has the obvious defects of serious energy loss, small aperture of the inter-stage hole, easy generation of vortex and local resistance when fluid flows through the inter-stage hole, reduced transmission efficiency, axial hydraulic force, high-speed fluid continuously flushing the inter-stage hole, axial thrust generated on a pump shell, increased abrasion of a pump body joint, vibration and even structural failure, unreasonable trend of a runner, and further increased energy consumption due to steering loss caused by the fact that the fluid needs to make a sharp turn to enter the inter-stage hole after being sprayed out of the distributing hole. The above problems limit the pressure regulation flexibility of the multistage slide pump, increase maintenance costs, and affect the stability of the long-term operation of the system. Accordingly, a solution is needed that optimizes the interstage transmission structure, reduces energy consumption, and improves reliability. Disclosure of utility model (1) Technical problem to be solved The utility model provides a side flow pipe of a multistage sliding vane pump, and aims to solve the problems of low transmission efficiency and the like. (2) Technical proposal The utility model provides a side flow pipe of a multistage sliding vane pump, which comprises a plurality of pump bodies which are mutually detachably connected, wherein each pump body comprises a first-stage pump body, at least one middle-stage pump body and a last-stage pump body which are sequentially connected, the number of the middle-stage pump bodies is increased or decreased to realize linear regulation of output pressure, the first-stage pump body is provided with a pump outlet, and the last-stage pump body is provided with a pump inlet; The first-stage pump body, the middle-stage pump body and the last-stage pump body are mutually independent and are respectively assembled and comprise a rotor provided with a sliding sheet, an eccentric part is sleeved outside the rotor, the inner wall of the eccentric part and the rotor are eccentrically arranged to form an eccentric cavity, a grading pump shell is wrapped outside the eccentric part, an annular pump cavity is formed between the grading pump shell and the eccentric part, the eccentric part is provided with a plurality of distributing holes communicated with the pump cavity and the eccentric cavity, two ends of the axial direction of the rotor are respectively provided with a pump shaft extending outwards, and adjacent pump shafts are axially detachably connected; The pump body is characterized in that a lateral flow pipe is arranged outside the adjacent pump body, the lateral flow pipes are respectively communicated with the pump cavities of the adjacent pump bodies, and pressurized fluid in the pump bodies is transmitted to the adjacent next-stage pump bodies through the lateral flow pipes. Further, the side flow pipe is provided with two bending parts, a advection part is arranged between the two bending parts, one end of the bending part is communicated with the pump cavity of the pump body, and the other end of the bending part is communicated with the advection part. Further, the bending part is of an arc-shaped structure and is used for stably transiting fluid, and the diameters of the advection parts are consistent. Further, one or two through holes are formed in the grading pump shell of the pump body, and the through holes are respectively communicated with the pump cavity and one end of the bending part of the side flow pipe. Further, the intermediate pump body is provided with two through holes symmetrically arranged along the radial direction. Further, the through hole is provided with a first installation position, one end of the bending part of the side flow pipe is provided with a second installation position corresponding to the first installation position, and the first installation position and the second installation position are fixedly connected through bolt sealing. Further, two groups of distributing holes are arranged on the eccentric member, and the two groups of distributing holes are symmetrically arranged on the peripheral wall of the eccentric member along the radial direction. Further, the through holes and the distributing holes are coaxially and correspondingly arranged, so that fluid energy loss is reduced. Further, one of the pump shafts which are adjacently connected is provided with a protruding block extending outwards, the other pump shaft is provided with a concave groove which is concave inwards, and the protruding block and the