CN-121993396-A - Gap compensation assembly and gear pump

CN121993396ACN 121993396 ACN121993396 ACN 121993396ACN-121993396-A

Abstract

The invention discloses a gap compensation assembly and a gear pump, which relate to the technical field of gear pumps, wherein the gear pump comprises a pump body and a gear pair arranged in the pump body, the gap compensation assembly comprises a floating side plate, a pressure sensing module and a magnetic adjusting module, the floating side plate is arranged between the gear pair and the inner side wall of the pump body, the pressure sensing module is arranged on the floating side plate and used for detecting axial pressure and/or radial pressure applied by the gear pair on the floating side plate and outputting corresponding detection signals, the magnetic adjusting module comprises an electromagnet, a permanent magnet and a controller, one of the electromagnet and the permanent magnet is arranged on the floating side plate, the other one of the electromagnet and the permanent magnet is arranged on the gear pair, and the controller is used for changing the current size and/or current direction of an input electromagnet according to the detection signals so as to drive the permanent magnet to move axially and/or radially along an inner gear. The invention aims to realize offset compensation of the gear ring and the internal gear, promote effective engagement of the gear ring and the gear, and increase stability.

Inventors

SU YUE
NI YAJUN
XUE HUI

Assignees

苏州汇川联合动力系统股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. A lash compensation assembly for a gear pump, the gear pump comprising a pump body and a gear pair disposed within the pump body, the lash compensation assembly comprising: The floating side plate is arranged between the gear pair and the inner side wall of the pump body; the pressure sensing module is arranged on the floating side plate and used for detecting the axial pressure and/or the radial pressure applied to the floating side plate by the gear pair and outputting corresponding detection signals, and The magnetic adjusting module comprises an electromagnet, a permanent magnet and a controller, wherein one of the electromagnet and the permanent magnet is arranged on the floating side plate, the other one of the electromagnet and the permanent magnet is arranged on the gear pair, and the controller is used for changing the current magnitude and/or the current direction of the electromagnet according to the detection signal so as to drive the permanent magnet to move along the axial direction and/or the radial direction of the internal gear.
2. The backlash compensation assembly according to claim 1, wherein the gear pair comprises a gear ring, an internal gear meshed with the gear ring, and a crescent plate provided between the internal gear and the gear ring, the pressure sensing module comprises an axial pressure sensor provided at a side of the floating side plate close to the crescent plate for detecting an axial pressure applied to the floating side plate by the crescent plate and outputting an axial detection signal; the magnetic adjusting module comprises an axial adjusting assembly, wherein the axial adjusting assembly comprises an axial electromagnet, an axial permanent magnet and an axial controller, one of the axial electromagnet and the axial permanent magnet is arranged on the inner gear, the other one of the axial electromagnet and the axial permanent magnet is correspondingly arranged on the floating side plate, magnetic poles of the axial magnetic piece and the axial electromagnet are the same, the axial permanent magnet can move along the axial direction of the inner gear, and the axial controller is used for changing the current magnitude and/or the current direction input into the axial electromagnet according to the axial detection signal.
3. The gap compensation assembly of claim 2, wherein a shaft hole is formed in one side of the floating side plate, which is close to the gear pair, and a gear shaft of the internal gear is penetrated through the shaft hole; the axial permanent magnet is sleeved on the gear shaft, and the axial electromagnet is arranged on one side of the floating side plate, which is close to the gear pair, and is arranged corresponding to the axial permanent magnet.
4. The clearance compensation assembly of claim 3, wherein a limiting groove is formed in one side of the floating side plate, which is close to the gear pair, and the shaft hole is formed in the bottom of the limiting groove; The axial electromagnet is accommodated in the limiting groove and sleeved on the outer side of the gear shaft.
5. The gap compensation assembly of claim 2, wherein a first mounting hole is formed in a side of the floating side plate, which is close to the gear pair, the axial pressure sensor is accommodated in the first mounting hole, and an induction end of the axial pressure sensor is in abutting contact with a side of the crescent plate, which is close to the floating side plate.
6. The lash compensation assembly of any one of claims 1 to 5, wherein the floating side plate comprises a plate body and a cofferdam body provided on a side of the plate body adjacent to the gear pair, the cofferdam body being located between the crescent and the ring gear; the pressure sensing module comprises a radial pressure sensor, wherein the radial pressure sensor is arranged on one side of the cofferdam body, which is close to the crescent moon body, and is used for detecting the radial pressure applied to the cofferdam body by the crescent moon plate and outputting a radial detection signal; The magnetic adjusting module further comprises a radial adjusting assembly, the radial adjusting assembly comprises a radial electromagnet, a radial permanent magnet and a radial controller, one of the radial electromagnet and the radial permanent magnet is arranged on the crescent, the other radial electromagnet is correspondingly arranged on the floating side plate, the magnetic poles of the radial electromagnet and the magnetic poles of the radial permanent magnet are the same, the radial permanent magnet can move along the radial direction of the internal gear, and the radial controller is used for changing the current magnitude and/or the current direction input into the radial electromagnet according to the radial detection signal.
7. The gap compensation assembly of claim 6, wherein a second mounting hole is formed in a side of the cofferdam body, which is close to the crescent moon plate, the radial pressure sensor is accommodated in the second mounting hole, and an induction end of the radial pressure sensor is in abutting contact with a side of the crescent moon plate, which is close to the cofferdam body.
8. The gap compensation assembly of claim 6, wherein the crescent is made of a permanent magnet material, and/or The radial permanent magnet covers the surface of the crescent.
9. The gap compensation assembly of any one of claims 1 to 5 wherein the floating side plates are provided with wire harness apertures.
10. A gear pump, comprising: A pump body; A gear pair arranged in the pump body, and The lash compensation assembly of any one of claims 1 to 9.

Description

Gap compensation assembly and gear pump Technical Field The invention relates to the technical field of gear pumps, in particular to a clearance compensation assembly and a gear pump. Background Gear pumps are a common type of hydraulic transmission, the main function of which is to convey liquid media, such as oil, water, etc. The gear pump works in such a way that the volume of the pump chamber is changed by meshing gears, thereby realizing the suction and discharge of liquid. The gear pump has the advantages of simple structure, stable operation, low noise, convenient maintenance and the like, and is widely applied to various hydraulic systems. The internal gear pump mainly comprises an internal gear, a gear ring, a pump body, a pump cover, a crescent plate, a floating side plate and the like. The internal gear is meshed with the gear ring, and drives the gear ring to rotate, so that liquid is sucked and discharged. In order to compensate the axial and radial gaps of the gear in the running process, the efficient running of the pump is kept, a compensation structure combining a spring and a crescent plate is generally adopted, and the crescent plate is pushed to move through compression or extension of the spring so as to compensate the axial displacement and the radial displacement of the gear. However, since the spring is subjected to repeated load during the continuous operation, abrasion is easily generated, and the elastic performance of the spring is reduced, thereby affecting the compensation effect, and serious abrasion may cause failure of the spring, thereby affecting the overall performance of the gear pump. Disclosure of Invention The invention mainly aims to provide a gear pump, which aims to realize offset compensation of a gear ring and an internal gear, promote effective engagement of the gear ring and the gear and increase stability. In order to achieve the above object, the present invention provides a clearance compensation assembly for a gear pump, the gear pump including a pump body and a gear pair disposed in the pump body, the clearance compensation assembly comprising: The floating side plate is arranged between the gear pair and the inner side wall of the pump body; the pressure sensing module is arranged on the floating side plate and used for detecting the axial pressure and/or the radial pressure applied to the floating side plate by the gear pair and outputting corresponding detection signals, and The magnetic adjusting module comprises an electromagnet, a permanent magnet and a controller, wherein one of the electromagnet and the permanent magnet is arranged on the floating side plate, the other one of the electromagnet and the permanent magnet is arranged on the gear pair, and the controller is used for changing the current magnitude and/or the current direction of the electromagnet according to the detection signal so as to drive the permanent magnet to move along the axial direction and/or the radial direction of the internal gear. In an embodiment, the gear pair comprises a gear ring, an inner gear meshed with the gear ring and a crescent plate arranged between the inner gear and the gear ring, the pressure sensing module comprises an axial pressure sensor, and the axial pressure sensor is arranged on one side, close to the crescent plate, of the floating side plate and is used for detecting axial pressure applied to the floating side plate by the crescent plate and outputting an axial detection signal; the magnetic adjusting module comprises an axial adjusting assembly, wherein the axial adjusting assembly comprises an axial electromagnet, an axial permanent magnet and an axial controller, one of the axial electromagnet and the axial permanent magnet is arranged on the inner gear, the other one of the axial electromagnet and the axial permanent magnet is correspondingly arranged on the floating side plate, magnetic poles of the axial magnetic piece and the axial electromagnet are the same, the axial permanent magnet can move along the axial direction of the inner gear, and the axial controller is used for changing the current magnitude and/or the current direction input into the axial electromagnet according to the axial detection signal. In one embodiment, a shaft hole is formed in one side, close to the gear pair, of the floating side plate, and a gear shaft of the internal gear penetrates through the shaft hole; the axial permanent magnet is sleeved on the gear shaft, and the axial electromagnet is arranged on one side of the floating side plate, which is close to the gear pair, and is arranged corresponding to the axial permanent magnet. In one embodiment, a limit groove is formed in one side, close to the gear pair, of the floating side plate, and the shaft hole is formed in the bottom of the limit groove; The axial electromagnet is accommodated in the limiting groove and sleeved on the outer side of the gear shaft. In an embodiment, a first mounting hole is formed