Load pressure self-feedback flow regulating valve

Abstract

The invention discloses a load pressure self-feedback flow regulating valve, and belongs to the application field of hydraulic machinery and motor vehicles. The self-feedback flow regulating valve is provided with four oil ports of a K1 control end, a K2 control end, a P1 output end and a P2 input end, and the P1 output end and the P2 input end are connected with an oil inlet and an oil outlet in a control oil circuit separately; K1 and K2 are two external pressure control ends, and the K2 end and a valve core spring pressure reset are in the same direction; the K1 end is used for controlling the flow regulating valve to tend to flow reduction; the K2 end is used for controlling the flow regulating valve to tend to flow increase, and in use, the K1 end and the K2 end are connected with the corresponding load pressure according to the requirements separately; and the opening degree of the flow valve is controlled through load pressure, and load self-feedback control is formed. According to the self-feedback flow regulating valve, the opening degree of the valve core can be automatically adjusted through the pressure feedback control end, and the purpose of flow regulation is achieved; and compared with a traditional electromagnetic proportional throttle valve, the self-feedback flow regulating valve has the advantages of large flow control range, simple and compact structure and convenient integration in a hydraulic system.

Description

technical field [0001] The invention relates to a load pressure self-feedback flow regulating valve, which belongs to the application field of hydraulic machinery and motor vehicles. Background technique [0002] With the continuous improvement of vehicle capacity, driving stability, safety and comfort requirements in the production process, especially for storage and transportation equipment with large load changes, an additional set of vehicle posture adjustment system is required in addition to oil and gas springs Through the control of the attitude of the car body, the consistency of the ground clearance of the car under the empty and full load state and the passability of the uneven road surface can be ensured, and the dangerous phenomena such as rollover of the car under special operating conditions can be effectively avoided, so as to meet the requirements of the car for the whole car. Road adaptability requirements, but because it is a high-pressure working system, a...

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Problems solved by technology

[0002] With the continuous improvement of vehicle capacity, driving stability, safety and comfort requirements in the production process, especially for storage and transportation equipment with large load changes, an additional set of vehicle posture adjustment system is required in addition to oil and gas springs Through the control of the attitude of the car body, the consistency of the ground clearance of the car under the empty and full load state and the passability of the uneven road surface can be ensured, and the dangerous phenomena such as rollover of the car under special operating conditions can be effectively avoided, so as to meet the requirements of the car for the whole car. Road adaptability requirements, but because it belongs to the high-pressure working system, and there are technical problems such as hydraulic lock internal leakage, adjustment height error, and lifting stability, it is particularly necessary to develop a high-stability vehicle attitude adjustment system

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