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Priority-type steering flow amplifying valve with plate-type connection

A flow amplification and priority valve technology, which is applied in fluid pressure actuation devices, fluid pressure actuation system components, servo motor components, etc., can solve the problems of many system components, high cost, pipeline connection layout load, etc.

Pending Publication Date: 2019-12-20
WUHU ZHONGYI HYDRAULIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many disadvantages such as many system components, pipeline connection layout load, and high cost.
At the same time, there are functional defects such as no end-point sense of steering, no overload protection of steering cylinder, and "self-propelled" steering cylinder due to unequal pilot oil pressure difference.

Method used

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  • Priority-type steering flow amplifying valve with plate-type connection
  • Priority-type steering flow amplifying valve with plate-type connection
  • Priority-type steering flow amplifying valve with plate-type connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for using a priority steering flow amplifying valve in this case includes the following steps:

[0039] S1. Connect and install the oil port between the valve body and the hydraulic steering gear to ensure that the oil inlet, oil return port, left steering oil cylinder interface oil port, and right steering oil cylinder interface oil port are connected correctly;

[0040] S2. When the system load changes (and) the steering wheel speed changes, when the oil supplied by the oil pump of the main oil circuit of the steering system passes through the priority valve, the flow required by the hydraulic steering gear is given priority;

[0041] S3. The internal left steering flow amplifying valve controls the movement of the spool of the left steering flow amplifying valve through the small flow of the left turning flow inlet of the hydraulic steering gear when the steering wheel is turned to the left, so that the flow amplifying valve Enter the left steering oil cylin...

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Abstract

The invention discloses a priority-type steering flow amplifying valve with plate-type connection. The steering flow amplifying valve comprises a valve body fixedly connected to a hydraulic steering gear through a bolt; the part, connected with the hydraulic steering gear, of the valve body comprises an oil inlet, an oil return port, a left steering oil cylinder port oil port, a right steering oilcylinder port oil port and an EF oil port capable of supplying oil to other hydraulic working systems; priority valves, a one-way valve and steering flow amplifying valve bodies corresponding to leftand right steering are arranged in the valve body; the priority valves are arranged between the oil inlet and the flow amplifying valve bodies; the hydraulic oil enters one of the flow amplifying valve bodies corresponding to steering through the priority valves; and according to oil liquid supplied by a main oil circuit of a system, the oil supply amount is amplified through a priority valve set, and the oil liquid is output to a corresponding load oil circuit. According to the technical scheme, the steering flow amplifying valve has the remarkable characteristics of being high in integration degree, compact in structure, complete in function, small in occupied space, simple in system layout, obvious in cost saving and the like.

Description

technical field [0001] The invention belongs to the field of steering hydraulic control, and more specifically, the invention relates to a priority type steering flow amplifying valve with plate connection. Background technique [0002] In the field of hydraulic steering gear systems of vehicles such as large loaders, mining vehicles, and tractors, the complexity of the hydraulic system is determined due to different uses and complex working conditions. There are two main types of common hydraulic steering hydraulic systems: [0003] One is a load-sensing hydraulic steering system consisting of a variable displacement pump, a steering cylinder, a coaxial flow amplifying steering gear, and a priority valve. Due to the large system flow, high system pressure, and poor stability of the variable steering system, the requirements for the steering gear are relatively high. Generally, it is necessary to use a high-pressure resistant, wide-angle hydraulic steering gear with cylinde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B21/00
CPCF15B13/027F15B13/02F15B21/00
Inventor 蔡国定张平平何关清金鑫
Owner WUHU ZHONGYI HYDRAULIC TECH
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