diverter priority valve

Abstract

The invention relates to hydraulic components. In order to solve the problem of high cost and low energy saving caused by the simultaneous configuration of a brake pump and a heat dissipation pump in an existing loader, it provides a diversion priority valve, which includes a sequence valve, a throttle valve, a priority valve, a priority The control valve, the throttle valve and the sequence valve are connected in parallel and then connected to the oil inlet P port; the sequence valve oil outlet is connected to the output A2 port, and the control ports at both ends are connected to the two ends of the throttle valve; the priority oil outlet of the priority valve is connected to the The output A1 port is connected, the second oil outlet pa2 port is connected with the output A2 port, the a3 control port of the priority valve is connected with the oil inlet p3 port, the spring chamber b3 control port is connected with the pb5 port of the priority control valve; the pa5 port of the priority control valve The oil port and the a5 liquid control terminal are connected to the output A1 port, and the pa6 oil port is connected to the oil return T port. The diverter valve of the invention can be used in the heat dissipation and hydraulic braking system of the loader, and a hydraulic pump can be used to supply oil, thereby saving manufacturing cost, saving energy consumption and reducing noise.

Description

technical field [0001] The present invention relates to a hydraulic control element, more specifically, to a diversion priority valve. Background technique [0002] With the mature development of loaders and the improvement of emission noise standards, the technology currently adopted by the loader industry is to configure a heat dissipation pump, drive a hydraulic motor fan through a hydraulic pump to dissipate heat, and use a hydraulic motor fan system to dissipate heat, reducing the noise of the fan. The hydraulic motor fan system is used for heat dissipation. The existing whole machine is equipped with an independent heat dissipation pump to supply oil to the hydraulic motor driving the fan. [0003] In addition, for safety considerations, some high-configuration loaders and stage III and IV stage loaders adopt full hydraulic braking, equipped with a brake pump, and charge the brake accumulator with fluid and store energy through the fluid charging valve. [0004] For t...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a priority flow diverter valve with a priority flow diversion function to meet the priority of the brake pump in order to solve the problem of high cost and no energy saving when the brake pump and the heat dissipation pump are equipped in the existing loader at the same time. The oil supply of the system, and at the same time meet the oil supply of the hydraulic motor in the heat dissipation system

Images