SU909380A1

SU909380A1 - Stand for testing pneumohydraulic accumulators

Info

Publication number: SU909380A1
Application number: SU802931619A
Authority: SU
Inventors: Владимир Николаевич Мироненко; Григорий Яковлевич Эпштейн
Original assignee: Предприятие П/Я В-2823
Priority date: 1980-05-27
Filing date: 1980-05-27
Publication date: 1982-02-28

Description

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Изобретение относитс к испытательной технике, в частности к стендам дл испытаний пневмогидравлических аккумул торов.The invention relates to testing equipment, in particular, to stands for testing pneumohydraulic batteries.

Известен стенд дл испытани пневмогидравлических аккумул торов, содержащий насос, соединенный напорной магистралью с первым выходом распределител , второй, и третий выходы которого соединены с жидкостными полост ми испытуемых аккумул торов , газовые полости которых соединены между собой, всасывающую магистраль насоса , соединенную с четвертым выходом распределител , предохранительный клапан, соединенный с напорной магистралью и бак дл рабочей жидкости, а также насос подпитки , включедный в напорную магистраль и установленный параллельно с ним предохранительный клапан 1.A stand for testing pneumohydraulic accumulators is known, comprising a pump connected by a pressure line to the first outlet of the distributor, the second and third outlets of which are connected to the liquid cavities of the test batteries, the gas cavities of which are interconnected, the suction line of the pump connected to the fourth outlet of the distributor , a safety valve connected to the pressure line and a tank for the working fluid, as well as a feed pump included in the pressure line and installed steam llelno safety valve 1 with him.

Недостатком стенда вл етс недостаточно высокий КПД из-за применени дополнительного насоса подпитки, объемные и механические потери которого, а также механические потери, в приводе насоса подпитки снижают его.The disadvantage of the stand is not sufficiently high efficiency due to the use of an additional make-up pump, whose volumetric and mechanical losses, as well as mechanical losses, in the make-up pump drive reduce it.

Цель изобретени - повыщение КПД стенда.The purpose of the invention is to increase the efficiency of the stand.

Указанна цель достигаетс тем, что насос снабжен регулирующим элементом, а стенд - обратным клапаном и гидроцилиндром с подпружиненным поршнем, кинематически св занным с регулирующим элементом насоса, причем поршнева полость гидроцилиндра соединена с баком через обратный клапан и со всасывающей магистралью насоса.This goal is achieved by the fact that the pump is provided with a regulating element, and the stand is equipped with a check valve and a hydraulic cylinder with a spring-loaded piston, kinematically connected with the regulating element of the pump, the piston cavity of the hydraulic cylinder connected to the tank through a non-return valve and to the suction line of the pump.

На чертеже показана принципиальна схема стенда дл испытани пневмогидрав10 лических аккумул торов.The drawing shows a schematic diagram of a test bench for pneumo-hydravoltaic batteries.

Стенд содержит бак 1, регулируемый насос 2, св занный напорной магистралью 3 с распределителем- 4 и предохранительным клапаном 5. Всасывающа магистраль 6 на15 coca 2 соединена с распределителем 4 порщневой полостью гидроцилиндра 7 и выходом обратного клапана 8, вход которого соединен с баком 1. Поршень гидроцилиндра 7 взаимодействует с пружиной 9 и кинематически св зан с качающимс узлом насоса 2, The stand contains a tank 1, an adjustable pump 2 connected by a pressure line 3 to a distributor 4 and a safety valve 5. A suction pipe 6 of 15 coca 2 is connected to the valve 4 by a hydraulic cylinder 7 cavity and an outlet of a check valve 8, the inlet of which is connected to the tank 1. The piston of the hydraulic cylinder 7 interacts with the spring 9 and is kinematically connected with the pumping unit 2,

20 а его ход ограничен в обе стороны регулировочными винтами 10 и 11.20 and its course is limited in both directions by adjusting screws 10 and 11.

Claims

The distributor 4 is connected to the liquid cavities of the pneumohydroaccumulators 12 and 13. The gas cavities of the accumulators 12 and 13 are interconnected. The stand works as follows. In the initial period, the battery 12 is filled with a working fluid (charged), and the battery 12 is empty (discharged). The distributor 4 is in the middle position. The adjustable pump 2, the swinging unit of which interacts with the hydraulic cylinder 7, is moved to the minimum flow position by the action of the spring 9, the value of which is regulated by the screw 11. The working fluid circulates in a closed loop, including the adjustable pump 2, the discharge line 3, the distributor 4, the suction line 6 After transferring the distributor 4 to the leftmost position (according to the drawing), the liquid under the pressure of the charge of the accumulator 12 flows through the suction line 6 to the inlet of the adjustable pump 2, the piston field cylinder 7 and the reverse valve 8. The fluid pressure check valve 8 is closed and the piston of the cylinder 7-, compressing the spring 9, moves all the way into the adjusting screw 10, increasing the pump flow to the required value determined by the screw 10. The spring .9 cylinder 7 is set to a pressure several times lower than the working pressure in the accumulators 12 and 13. The gas cavities of the accumulator are interconnected, therefore the pressure at the inlet and at the outlet of the adjustable pump 2 is equal. Consequently, the pump operates as a dose .top, the drive power of which is determined by friction loss and fluid leakage. At the moment of complete emptying of the battery 12, the fluid pressure at the inlet to the adjustable Hacod 2, hydraulic cylinder 7 and in front of the non-return valve 8 drops sharply. The spring 9 moves the piston of the cylinder 7 and the adjustable pump 2 to the minimum feed position. The check valve 8 opens, passing liquid from the tank 1 to the inlet of the variable pump.

2. The pump energizes the battery 13, to compensate for fluid leakage during the discharge of the battery 12. Since the regulated pump 2 energizes the battery 13 with a minimum supply, the pump drive power will also be minimal. The make-up stops when the pressure in the accumulator 13: becomes equal to the setting pressure of the safety valve 5. In the next cycle, the distributor 4 moves to the extreme right position, at which the process of discharging the accumulator 13 and filling the working fluid of the accumulator 12, and then filling it , occurs as described. The proposed test bench for pneumohydroaccumulator excludes a special make-up pump, a mechanical pump drive and a safety valve. This reduces energy consumption and increases stand efficiency. Claims for testing pneumohydraulic accumulators, comprising a pump, a discharge pipe connected to the first outlet, a distributor, the second and third outputs of which are connected to the liquid cavities of the test batteries, the gas cavities of which are interconnected, the suction line of the pump connected to the fourth outlet a valve, a safety valve connected to a pressure line and a tank for the working fluid, characterized in that in order to increase efficiency, the pump is equipped with uyuschim element and stand - reverse. valve and hydraulic cylinder with a spring-loaded piston, kinematically connected with the regulating element of the pump, with-. than the piston cavity of the hydraulic cylinder is connected to the tank through a check valve and to the suction line of the pump. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 709847, cl. F 15 B 19/00, 1978.

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