Pressure adaptation control mechanism and hydraulic motor

Abstract

The invention relates to the technical field of hydraulic motors, in particular to a pressure adaptation control mechanism and a hydraulic motor. Comprising a valve body in which a plurality of oil passages are formed; the valve sleeve is assembled in the valve body in a sliding mode, a plurality of oil ports are formed in the valve sleeve and correspondingly communicated with the oil channels, and pilot acting force is formed on the axial side of the valve sleeve; the valve element is assembled in the valve sleeve in a sliding mode, and the valve element controls connection and disconnection of the multiple oil ports in a sliding mode; the pressure control assembly is located on the other axial side of the valve sleeve and comprises a pressure adjusting elastic piece and a constant-pressure elastic piece which are arranged in a sleeved mode, the pressure adjusting elastic piece acts on the valve sleeve, the constant-pressure elastic piece acts on the valve element, the valve element slides under the action of pressure oil, and the constant-pressure elastic piece acts on the constant-pressure elastic piece. And the valve sleeve slides under the action of the pilot acting force. The technical problems that in the prior art, the pressure of a hydraulic system adjusted by a constant pressure valve cannot be changed in the operation process, and the use difficulty is increased are solved.

Description

technical field [0001] The invention relates to the technical field of hydraulic motors, in particular to a pressure adaptive control mechanism and a hydraulic motor. Background technique [0002] At present, pressure control is widely used in complete sets of equipment and hydraulic walking machinery. Among many pressure control methods, constant pressure control is the most widely used one. However, in the actual application process, in order to meet the needs of different systems, the constant pressure regulator should adjust the pre-tightening force of the spool spring before leaving the factory to control the maximum pressure of the hydraulic system. [0003] In the existing adjustment technology, the adjusting screw top spring seat is usually used to compress the spring, and then the sealing nut is used for locking. For example, the application document with the application number CN201320388265.4 discloses a constant pressure cut-off valve, and specifically discloses...

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Problems solved by technology

[0004] In order to solve the technical problem that the hydraulic system pressure set by the constant pressure valve in the prior art cannot be changed during operation, which increases the difficulty of use, the present invention provides a pressure adaptive control mechanism and hydraulic motor, which solves the above technical problems question

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