SU1125490A1 - Stand for testing doubled adjustable pump - Google Patents

Abstract

A STAND FOR POWERING A DIFFERENTLY REGULATED PUMP, containing a hydraulic tank with a working fluid, a drive with a gearbox, kinematically connected with the test pump, two parallel discharge lines, each connected to one of the sections of the tested pump and connected in parallel with one hydraulic motor with a single-sided spray motor with a hydraulic motor. power and safety valve, with each motor is kinematically connected to the drive reducer, characterized in that, in order to improve efficiency and expand nktsionalnyh capabilities of stand kazkda injector duct is provided with adjustable additional load hydraulic motor, hydraulically connected in parallel and the hydraulic motor main kinematiches§ ki zannm communication with the drive gear, wherein the additional motors (A made with a working volume of less than the working volume of the pump test.

Description

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The invention relates to hydraulic machine building, and more specifically, to testing hydraulic machines.

A stand for extracting hydraulic machines is known, consisting of a drive engine, a pump, a hydraulic motor, between whose shafts a gearbox is installed, and a load channel Cl

The disadvantage of this stand is that it requires a lot of energy to test hydraulic machines.

The closest to the technical essence of the invention is a test bench for pumps, containing a hydraulic tank with a working fluid, a drive with a reducer, kinematically connected with the test pump, two parallel discharge lines, each of which is connected to one of the sections of the tested pump and provided with parallel connected one to another by a hydraulic motor with a power regulator and a safety valve, each motor being kinematically connected to the gearbox of a C2J drive.

A disadvantage of the known stand is that part of the energy conducted during testing is lost in the form of heat in the loading valves.

The purpose of the invention is to increase the efficiency and decomposition of the functional capabilities of the stand.

This goal is achieved by having a test bench for a dual variable pump containing a hydraulic tank with a working fluid, a drive with a reducer, kinematically connected with the pump to be used, two parallel discharge lines, each of which is connected to one of the sections of the tested pump and is connected in parallel one to another with hydraulic motor with power control and safety valve, each motor being kinematically connected to the drive reducer, provided in each pressure mage An additional adjustable load motor is connected hydraulically parallel to the main motor and is kinematically connected to the drive reducer, and the additional hydraulic motors are designed with a displacement smaller than that of the pump under test.

The drawing shows a diagram of a test bench for a dual variable pump.

The sterster contains a hydraulic tank 1 with a working fluid, a drive 2 with a gearbox 3, kinematically connected with the test pump 4, two parallel discharge lines 5, each of which is connected to one of the sections of the pump being pumped 4 and is connected in parallel with one another by a hydraulic motor 6c regulator 7 power and safety valve 8. Each motor 6 is kinematically connected to the gearbox 3 of the drive 2. Each discharge line 5 is equipped with an additional load hydraulic motor 9 connected by a hydraulic Eski parallel to the main hydraulic motor 6 and kinematically associated with the drive gear March 2, wherein the additional hydraulic motors 9 are of a working emom smaller Started which the test pump volume 4. Each injector duct 5 is provided with a flowmeter 10.

The stand for testing a dual variable pump operates as follows.

During tests (running in) of pump 4 at various levels of overpressure, the power developed by the hydraulic machines circulates from two sections of the tested variable pump 4 in the form of working fluid streams, respectively, to the adjustable hydraulic motors 6, and is transmitted from them to the gearbox 3.

The pressure in each branch of the discharge line 5 is established by changing the size of the working volume of the additional load hydraulic motors 9, through which the excess fluid created by the test pump A due to the difference in pump rotation speed and the adjustable hydraulic motors 6 is drained into the hydraulic tank 1. At the same time, the working fluid energy through additional load hydromotors 9, returns with greater completeness in the form of mechanical 1 (energy to gear 3 drives:.

When the load changes, the power flow controllers 7 change the operational volume of the hydraulic motors to 6 s: in311

hryunno with a change in the working volume of the corresponding section of the test pump 4. By changing the workers, the volumes of the additional load hydromotors 9, the load is redistributed between the branches of the discharge line 5.

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The invention of poznol from reducing the energy consumption during testing of hydromacine and by redistributing the loads in the branches of the discharge 5 line of the dual pump approximates the test conditions to the real, estimated functionality of the stand.

Claims (1)

STAND FOR TESTING A TWO CONTROLLED PUMP, containing a hydraulic tank with a working fluid, a drive with a gearbox, kinematically connected to the test pump, two parallel discharge lines, each of which is connected to one of the sections of the test pump and is equipped with a hydraulic motor in parallel with the power regulator and a safety valve, while each hydraulic motor is kinematically connected to the drive gear ·, characterized in that. in order to increase efficiency and expand the function In order to maximize the capabilities of the bench, each discharge line is equipped with an additional adjustable load hydraulic motor connected hydraulically in parallel with the main hydraulic motor and kinematically connected with the drive gearbox, with additional hydraulic motors made with a working volume less than the working volume of the pump under test.