SU1523807A1

SU1523807A1 - Positive displacementt hydraulic transmission

Info

Publication number: SU1523807A1
Application number: SU874236239A
Authority: SU
Inventors: Александр Алексеевич Кабешкин; Юрий Александрович Лебедев; Александр Михайлович Макеев; Анатолий Васильевич Пожарский; Андрей Юрьевич Шахов
Original assignee: Предприятие П/Я В-8670
Priority date: 1987-02-02
Filing date: 1987-02-02
Publication date: 1989-11-23

Abstract

Изобретение может быть использовано в гидропередачах, работающих в напр женном тепловом режиме. Цель изобретени - снижение потерь мощности гидропередачи при выполнении вспомогательного насоса двухступенчатым с отключаемой секцией при помощи гидроуправл емого разгрузочного клапана. Регулируемый насос 1 и гидромотор 2 сообщены между собой силовыми магистрал ми (М) 3, 4. Подпиточные клапаны (К) 5 подключены выходами к М 3, 4. Устройство 7 охлаждени жидкости выполнено в виде двух гидроуправл емых распределителей (Р) 8, 9, входы которых сообщены каждый с одной из М 3, 4, выходы - с дренажной гидролинией. Две полости управлени каждого Р 8, 9 подключены к противоположным М 3, 4. Лини 14 нагнетани вспомогательного насоса 6 сообщена с входом К 5 и дросселем 12, установленным в дренажной гидролинии. Перед дросселем 12 подключена полость управлени разгрузочного К 18. Р 8, 9 выполнены в виде конических К с цилиндрическими хвостовиками и подводом рабочей жидкости к торцам К. Диаметр уплотнени конического К выполнен большим диаметра хвостовика. В линии 14 установлен через обратный К 15 дополнительный вспомогательный насос 16, управл емый по давлению в полости 17 К 18. 2 з.п. ф-лы, 2 ил.The invention can be used in hydraulic transmissions operating in a stressed thermal mode. The purpose of the invention is to reduce the power loss of the hydraulic transmission when the auxiliary pump is two-stage with a switchable section using a hydraulically controlled relief valve. An adjustable pump 1 and a hydraulic motor 2 are connected to each other by power lines (M) 3, 4. The feed valves (K) 5 are connected to the outputs M 3, 4. Liquid cooling device 7 is made in the form of two hydraulic control valves (P) 8, 9 , the inputs of which are communicated each with one of the M 3, 4, outputs - with drainage hydroline. Two control cavities of each P 8, 9 are connected to opposite M 3, 4. Line 14 of the discharge of the auxiliary pump 6 is connected to the input K 5 and the throttle 12 installed in the drainage line. Before throttle 12, the control cavity of the unloading K 18 is connected. P 8, 9 are made in the form of conical K with cylindrical shanks and supply of working fluid to the ends of K. The diameter of the seal of the conical K is made larger than the diameter of the shank. In line 14, an additional auxiliary pump 16 is installed through the return K 15 and is controlled by pressure in the cavity 17 K 18. 2 Cp. f-ly, 2 ill.

Description

Фиг. 2.FIG. 2

Claims

Claim

1. Volumetric hydraulic transmission, containing an adjustable pump and a hydraulic motor, interconnected by power lines, make-up valves connected by their outputs to the lines, a working fluid cooling device made in the form of two hydraulic control valves, the inputs of which are each connected to one of the lines, the outputs are from a drainage hydraulic line, and two control cavities of each distributor are connected to opposite lines, an auxiliary pump, the discharge line of which is communicated with the input of make-up lapane and choke on tlichayuschayasya in that, in order to reduce losses of the hydraulic transmission of power when the auxiliary pump is a two-step with disconnectable section using hydraulically discharge valve, a throttle is installed in the drain hydraulic line, wherein the cavity driving Nia discharge valve connected to the latter in front of the throttle.

2. Hydraulic transmission according to claim 1, about t g kicking so that the valves are made in the form of conical valves with a cylindrical shank and a supply of working fluid from the mains to the valve ends.

10 3. The hydraulic transmission according to p. 2, characterized in that the diameter of the conical valve seal is made larger than the shank diameter.