SU967869A1

SU967869A1 - Vehicle hydraulic system

Info

Publication number: SU967869A1
Application number: SU803213878A
Authority: SU
Inventors: Борис Александрович Любимов; Давид Ефимович Флеер; Вадим Иосифович Перельмитер; Семен Львович Кустанович; Владимир Евгеньевич Борейшо; Семен Дмитриевич Ярош
Original assignee: Предприятие П/Я А-1697; Предприятие П/Я Р-6194
Priority date: 1980-12-01
Filing date: 1980-12-01
Publication date: 1982-10-23

Description

Изобретение относитс к сельскохоз йственному машиностроению, а именно, к гидравлическим системам тракторов сельскохоз йственного назначени .FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular, to hydraulic systems of agricultural tractors.

Известна гидравлическа система транспортного средства, содержаща распределитель и насос гидросистемы рулевого управлени , сливна гидролини которой соединена с баком, а всасывающа - с баком и с распределителем гидросистемы навесного оборудовани посредством сливной гидролинии -с фильтром и дросселем.The known hydraulic system of the vehicle contains a distributor and a steering hydraulic system pump, the drain hydrolines of which are connected to the tank, and the suction system is connected to the tank and the hydraulic distributor of the attachments by means of the drain hydraulic lines with a filter and throttle.

Недостатком известного устройства вл етс то, что при его использовании не обеспечиваетс полна очистка рабочей жидкости, а также велики гЮтери мощности в гидравлической системе.A disadvantage of the known device is that when it is used it is not provided with a complete cleaning of the working fluid, as well as high hydraulic capacities in the hydraulic system.

Целью изобретени вл етс уменьшение потерь мощности в гидравлической системе.The aim of the invention is to reduce power losses in a hydraulic system.

Эта цель достигаетс тем, что в гидрав лической системе сливна гидролини гидросистемы навесного оборудовани соединена перед фильтром.со сливной гидролинией гидросистемы рулевого управлени , а после фильтра - дополнительной сливной гидросистемой через дроссель с баком.This goal is achieved by the fact that, in the hydraulic system, the drainage hydrolines of the hydraulic system of attachments are connected before the filter with the drainage of the hydraulic system of the steering system, and after the filter, with an additional drainage hydraulic system through a throttle to the tank.

Гидросистема снабжена обратным клапаном и радиатором, параллельно установленными в сливной гидролинии гидросистемы навесного оборудовани .The hydraulic system is equipped with a check valve and a radiator, installed in parallel in the drainage of the hydraulic system of the attached equipment.

На чертеже изображена схема гидросистемы транспортного средства.The drawing shows a diagram of the hydraulic system of the vehicle.

Гидросистема транспортного сред10 ства содержит распределитель 1 и насос 2 гидросистемы рулевого управлени , сливна гидролини 3 которой соединена с баком 4, а всасывающа 5 - с баком 4, имеющим перегородку 6, The vehicle's hydraulic system contains a distributor 1 and a hydraulic steering pump 2, the drain hydrolines 3 of which are connected to the tank 4, and the suction 5 to the tank 4 having a partition 6,

15 и с распределителем 7 гидросистемы навесного оборудовани посредством сливной гидролинии 8 с фильтром 9 , дросселем 10 и обратным клапаном 11. В сливной гидролинии 8 параллельно установлен 15 and with the distributor 7 of the hydraulic system of the attached equipment by means of a drain hydroline 8 with a filter 9, a throttle 10 and a check valve 11. In the drain hydroline 8 is installed in parallel

20 также радиатор 12 дл охлаждени рабочей жидкости. Распределитель 7 соединен нагнетательной гидролинией 13 с насосом 14, всасывающа гидролини 15 которого соединена с ба25 ком 4.20 also has a radiator 12 for cooling the working fluid. The distributor 7 is connected by a discharge hydroline 13 to a pump 14, the suction hydroline 15 of which is connected to the tank 4.

Гидравлическа система транспортного средства работает следующим об .разом.The vehicle's hydraulic system operates as follows.

Рабоча жидкость из гидробака 4 Working fluid from hydraulic tank 4

Claims

JO through the suction line 15 of the pump 14 enters the hydraulic system of attachments, the output of which is directed to the drain hydroline 8. Part of the working fluid from the drain hydraulic line 8 is directed through the radiator 12 to the hydraulic tank 4, and the rest of the hydraulic line 8 through the check valve 11 together with the flow coming through the hydroline of the drain 3 of the steering hydraulic system, it is directed to the filter 9, after which it enters the hydraulic suction line 5 of the hydraulic control system of the steering. The excess of working fluid through the hydroline 8 of the drain through the choke 10 enters the hydraulic tank section, fenced off by a partition 6, through which the excess fluid of the working fluid is poured into another section of the hydraulic tank 4. If the hydraulic line 8 of the attachment hydraulic system does not flow into the hydraulic system 18, for example disconnecting it from 1 of the drive shaft, when working with single-acting hydraulic cylinders, etc., the flow only from the steering hydraulic system is directed to the filter 9. At the same time, the return valve 11 prevents the flow of working fluid into the radiator 12, which ensures continuous filtration of the working fluid and prevents its supercooling. Similarly, the hydraulic system operates with an increase in the hydraulic resistance of the filter 9 as a result of its partial clogging: the flow from the hydraulic system of attachments is directed to the hydraulic tank 4 through the radiator 12, and the flow from the hydraulic system of the steering control through the filter 9, In all considered operating modes without flow filtration from the pump 14, the part of the working fluid flow, equal to the flow through the choke 10, returns to the steering hydraulic system by suction hydroline 5, which ensures heat and mass transfer in the semi-closed hydraulic steering circuit. The hydraulic resistance of the throttles 10 is chosen so as to provide suction pressure in the suction line 5 in the modes of summation at the discharge of the flows from pumps 2 and 14, which favorably affects the operating conditions of the pump 2, on the other hand, when the pump 14 is turned off, due to the presence of flow in throttle 10 must be provided, heat and mass transfer in the steering hydraulic system. The partition 6 in the hydraulic tank 4 ensures that the working fluid is drained from the suction section of the pump 2 to the suction section of the pump 14 in the summation mode to drain the flows from pumps 2 and 14. In the off mode of the pump 14, the partition 6 provides autonomous operation of the hydraulic steering system. Claims of the invention A vehicle hydraulic system comprising a distributor and a steering system hydraulic pump. the control, the drainage hydrolines of which are connected to the tank, and the suction: schA - with the tank and with the distributor of the hydraulic system of the attachments through its drain hydraulic lines with a filter and a throttle, about and a liter. so that, in order to reduce power losses, the drainage hydrolines of the attachment hydraulic system are connected in front of the filter to the drainage hydroline of the steering hydraulic system, and after the filter, an additional drainage line through the throttle to the tank.

2. Hydraulic system according to In. 1, that is, it is equipped with a check valve and a radiator, installed in parallel in the drainage line of the hydraulic system of attached equipment.