SU1707305A1 - Hydraulic drive test stand - Google Patents

Abstract

The invention relates to a general engineering hydraulic drive and can be used for testing hydraulic drives with differential hydraulic motors. The purpose of the invention is to expand the functionality of the stand when testing simulated hydraulic actuators with differential hydraulic cylinders. The bench contains simulated hydraulic drive with pump 1, tank 3, hydraulic motor 4, made adjustable, retaining device 5, loading system 6c with hydraulic motor 8, pressure valve 9, overflow valve 10 mounted on hydraulic motor drain 4. Retaining device 5 is mounted on hydraulic motor drain 8 the output element of which is kinematically connected with the output element of the hydraulic motor 8, and the ratio of the working volumes of the hydraulic machines and the active areas of the working cavities of the differential hydraulic cylinder of the simulated hydraulic drive are equal between by myself 1 hp f-ly, 1 silt, (L S

Description

Jl

J-

The invention relates to a general hydraulic actuator and can be used to test a hydraulic drive with differential hydraulic motors.

The purpose of the invention is to expand the functional capabilities of the stand when exploring simulated hydraulic actuators with -,. L i-reactive hydraulic dials.

Neither the drawing shows the principal: cm. M1, h.

The gtn contains i l MH-mountable hydraulic unit .-, pump 1 driven by 01 electr. F-dg-l, P: n 2, bau. 3, hydromoor 4, | 1; g (; - s video busty ;,; and B. assisted / c threatened with distributors,. (liters, etc. (not shown), the system.; e- and g. nyog. 6, driven by ...:; rodoigatelch 7 by hydraulic motor 8, by valve 9, installed by par I.: neither the pressure line of the system n; -gru, and agora overflow valve-; ,, - ,,, „р installed in series on .t -: fe g- dromotsra 4 and tank 11.

As a retaining device, mo-, j.t .: png men t -gr, i;,., Choke, re-:; jr .; p ... xi.mo. one-. riH pr either

i ----- | p.iMO O YSTSHY II others

i-ia in the drawing as an example is shown Mi1: (d 1Ornostuyuscheo in the form of a differential |. ;, valve.

When testing on the bench, the operating modes of the hydraulic drive of a lifting machine with a differential hydraulic unit and variable load on ujrof.c- with an operating test circuit are simulated. the parameters of the hydraulic drive elements (retaining device, hydraulic cylinder, pipes, and pipelines, etc.) for stability and KJ

"P1.1cho transient processes in hydropri Ch .i

The receiving chamber of the hydraulic cylinder im- i-ipyercr- input cavity of the hydraulic motor 4, e. The hydraulic cylinder chamber is simulated by the output cavity of the hydraulic motor 8. The input cavity of the hydraulic motor B and the output no / iovib of the hydraulic motor 4 serve as a DLR to create the HP .-. This load is provided by p .-; oyl1 -: - by mi valves 9 and 10

A change in the ratio of the buildings to the per- ss and ip valves provides regulation of the load, including the change in its incl.

In the process of operation of the stand, the working fluid from the pump 1 of the simulated hydraulic drive through the hydraulic motor 4 enters the line of the loading valve 10, and into the cavity before

the retaining device 5 receives liquid from the Nessos 6 loading circuit through the hydraulic hole 8. As a result, at different values of the working volumes of the hydraulic motors 4 and 8, the difference in costs for

the input of the motor 4 and the output of the motor 8.

By adjusting the working volume of any of the hydraulic motors, the ratio of the working volumes of the hydraulic motors is ensured,

equal to the ratio of the working areas of the simulated hydraulic cylinder.

With such a ratio of working volumes of hydromotors, the ratio of flow rates and inlet pressures to

Claims (2)

the output of the hydraulic cylinder of the simulated hydraulic drive, the equal ratio of costs and pressures at the input of the hydraulic motor 4 and the output of the hydraulic motor 8 of the stand, respectively, i.e. The mode of operation of the simulated hydraulic drive and the bench is identical in terms of the main hydraulic parameters. Claims: Test stand for hydraulic applications. containing a hydraulic loading system with a loading hydraulic motor, the output element of which is kinematically connected to the output element of the hydraulic motor of the hydraulic drive under test, two retaining devices. installed in the drain hydrolines of the hydraulic motor of the hydraulic drive under test and of the loading hydraulic motor, and parallel to the latter a pressure valve is installed, characterized in expanding the functional capabilities of the stand when testing simulated hydraulic drives with differential hydraulic cylinders, forcing the hydraulic motor and hydraulic motor of the subject hydraulic drives are made in the form of volumetric hydrom tires. one of which is made with an adjustable working volume, the retaining condition of the hydraulic motor of the tested hydraulic drive is made in the form overflow valve 2. The stand according to claim 1, of which is the ratio of the working volumes of hydraulic machines and the active areas of the working cavities of the differential-foro hydraulic cylinder simulated hydraulic drive are equal to each other.