Valve for preventing hydraulic motor from reversing

Abstract

The invention discloses a valve for preventing a hydraulic motor from reversing. The valve for preventing the hydraulic motor from reversing comprises a transition block. The transition block is provided with a first working port and a second working port which respectively correspond to an oil inlet and an oil outlet of the hydraulic motor; the transition block is provided with two installation cavities; a unit cushion valve is assembled in each installation cavity; the bottom wall of a first installation cavity and the bottom wall of a second installation cavity are respectively provided with a first connecting oil duct and a second connecting oil duct, wherein the first oil duct is used for enabling the first installation cavity to be communicated with the first working port, and the second connecting oil duct is used for enabling the second installation cavity to be communicated with the second working port; a valve core assembly is arranged in each unit cushion valve; a drainage port controlled by the valve core assembly is arranged in the corresponding unit cushion valve; a first decompression channel and a second decompression channel are respectively arranged in the transition block, wherein the first decompression channel is used for communicating the first working port with the drainage port of a second unit cushion valve, and the second decompression channel is used for communicating the second working port with the drainage port of a first unit cushion valve; the first unit cushion valve and the second unit cushion valve are used for absorbing and balancing hydraulic fluctuation shocks of the first working port and the second working port through the up-and-down motions of the internal valve core assemblies.

Description

technical field [0001] The invention relates to the technical field of hydraulic control in construction machinery, in particular to a control valve used in construction machinery to eliminate or prevent hydraulic shock caused by the inertia of a hydraulic rotary motor, in particular to a valve for preventing reverse rotation of a hydraulic motor. Background technique [0002] The pressure shock and pressure fluctuations brought by the inertia during the stop of the hydraulic rotary motor on the construction machinery will cause the hydraulic motor to rotate forward and reverse alternately in an instant. The maneuverability of the construction machinery rotation is reduced, and other hydraulic components of the system may even be damaged, resulting in shortened life of the whole machine. In the prior art, people generally use the rotary motor relief valve to limit the rotary system. The rotary motor relief valve plays the role of buffering overflow within a certain range, bu...

AI Technical Summary

Problems solved by technology

[0002] The pressure shock and pressure fluctuations brought by the inertia during the stop of the hydraulic rotary motor on the construction machinery will cause the hydraulic motor to rotate forward and reverse alternately in an instant. Reduce the maneuverability of construction machinery rotation, and may even damage other hydraulic components of the system, resulting in shortened machine life

In the prior art, people generally use the rotary motor relief valve to limit the rotary system. The rotary motor relief valve plays the role of buffering overflow within a certain range, but it is difficult for the relief valve to be superimposed on the working oil port of the hydraulic rotary motor. , so it cannot better eliminate and absorb the pressure shock of the working oil port of the hydraulic motor, and ensure that the main engine rotates to achieve a smooth parking effect

Images