CN102966613A - Connecting method of hydraulic fluid-feeding throttle speed adjusting circuit of hydraulic test rig - Google Patents

Abstract

The invention discloses a connecting method of a hydraulic fluid-feeding throttle speed adjusting circuit of a hydraulic test rig. The connecting method comprises the following steps that firstly, a peripheral branch of a low-pressure pump of a hydraulic circuit of a hydraulic system is connected with a pressure reducing valve in series; then, a throttle valve is connected between a hydraulic pump and a hydraulic cylinder in series to control the quantity of hydraulic fluid flowing into the hydraulic cylinder; an overflow valve is arranged in the hydraulic fluid-feeding throttle speed adjusting circuit consisting of a quantitative pump, a hydraulic tank and the hydraulic cylinder, the excessive redundant hydraulic fluid of the quantitative pump returns to the hydraulic tank through the overflow valve, and the outlet pressure of the quantitative pump is the setting pressure of the overflow valve and basically maintains a fixed value. The connecting method has the beneficial effects that the hydraulic circuit is simplified, the action is reliable, the precision of the converted position is higher, and the sufficient transition precision is realized.

Description

A kind of connecting means of entrance throttle governing circuit loop of hydraulic test bench

Technical field

The present invention relates to the hydraulics field, relate in particular to a kind of connecting means of entrance throttle governing circuit loop of hydraulic test bench.

Background technique

Hydraulics is one of key technology that realizes modernized transmission and control.Hydraulicdriven various element because lightweight, volume is little, can arrange easily and flexibly as required; realize conveniently, easily straight line motion, can realize large-scale stepless speed regulation, automatically realize overload protection in conjunction with state-of-the-art technology automaticity height and manipulation control, but adopt mineral oil as working medium relative movement face lubricating by oneself, long service life.Along with improving constantly of hydraulic machinery automaticity, the hydraulic element number of applications sharply increases, miniaturization of components, the system integration development trend that is inevitable.Particularly hydraulics and sensory technique, the close combination of microelectronic technology, many electrical integrated components and parts of machine (liquid) such as electrohydraulic proportional control valve, digital valve, electro-hydraulic servo cylinder have appearred, make hydraulics at high pressure, at a high speed, the aspect such as high-power, Highgrade integration obtained significant development.Undoubtedly, the computer-aided design of hydraulic element and hydraulic system, computer-aided experiment and real time computer control also are the developing direction of current hydraulics.But the hydraulic system assembly of existing this product exists a lot of problems from operating method, working method, numerous and diverse different amount such as structure, and this causes work poor efficiency, heavier, the high expensive of weight of equipment.

Summary of the invention

The purpose of this invention is to provide and a kind ofly be conducive to simplify oil circuit, can make reliable in action, be conducive to improve conversion positional accuracy, possess the connecting means in the entrance throttle governing circuit loop of the auxiliary hydraulic test bench that improves the equipment operation ability, to solve many deficiencies of prior art.

Purpose of the present invention is come specific implementation by the following technical programs:

A kind of connecting means of entrance throttle governing circuit loop of hydraulic test bench mainly is comprised of following:

At first, at reduction valve of peripheral branch road series connection of the low pressure pump of hydraulic system oil circuit;

⑵ then be connected on a throttle valve between oil hydraulic pump and the oil hydraulic cylinder, is used for controlling the flow that enters oil hydraulic cylinder;

⑶ arrange a relief valve in by the formed entrance throttle governing circuit of metering pump, fuel tank and oil hydraulic cylinder loop, the unnecessary fluid of metering pump passes through the relief valve oil sump tank, and the outlet pressure of metering pump is set pressure and the basic definite value that keeps of relief valve.

The beneficial effect of the connecting means in the entrance throttle governing circuit loop of hydraulic test bench of the present invention is: not only simplified oil circuit, and made reliable in action, the positional accuracy of conversion is also higher, can obtain enough changing-over precision; Simultaneously, be conducive to arrange easily and flexibly as required, can improve the operation controllability, reduce labor intensity.

Embodiment

The connecting means in the entrance throttle governing circuit loop of the described hydraulic test bench of the embodiment of the invention, its key step comprises:

At first, at reduction valve of peripheral branch road series connection of the low pressure pump of hydraulic system oil circuit;

⑵ then be connected on a throttle valve between oil hydraulic pump and the oil hydraulic cylinder, is used for controlling the flow that enters oil hydraulic cylinder;

⑶ arrange a relief valve in by the formed entrance throttle governing circuit of metering pump, fuel tank and oil hydraulic cylinder loop, the unnecessary fluid of metering pump passes through the relief valve oil sump tank, and the outlet pressure of metering pump is set pressure and the basic definite value that keeps of relief valve.

Claims (1)

1. the connecting means in the entrance throttle governing circuit loop of a hydraulic test bench is characterized in that, mainly is comprised of following steps:

At first, at reduction valve of peripheral branch road series connection of the low pressure pump of hydraulic system oil circuit;

⑵ then be connected on a throttle valve between oil hydraulic pump and the oil hydraulic cylinder, is used for controlling the flow that enters oil hydraulic cylinder;

⑶ arrange a relief valve in by the formed entrance throttle governing circuit of metering pump, fuel tank and oil hydraulic cylinder loop, the unnecessary fluid of metering pump passes through the relief valve oil sump tank, and the outlet pressure of metering pump is set pressure and the basic definite value that keeps of relief valve.