SU935462A1

SU935462A1 - Boom crane winch hydraulic drive

Info

Publication number: SU935462A1
Application number: SU803007569A
Authority: SU
Inventors: Олег Васильевич Бухов; Алексей Дмитриевич Шахов; Владимир Викторович Подгорков; Олег Аркадьевич Смирнов; Валентин Юрьевич Фомичев
Original assignee: Ивановский энергетический институт им. В.И.Ленина
Priority date: 1980-11-24
Filing date: 1980-11-24
Publication date: 1982-06-15

Description

() ГИДРОПРИВОД ЛЕБЕДКИ СТРЕЛОВОГО КРАНА() CROWN WINDOW

II

Изобретение относитс к подъемнотранспортному машиностроению, а именно к гидроприводам лебедок, и может быть применено в стреловых кранах.The invention relates to a lifting transport machinery, namely to hydraulic drives of winches, and can be applied in jib cranes.

Известен гидропривод лебедки стрелового крана, содержащий два гидромотора различного объема, соединенные гидролини ми через гидрораспределитель с ручным управлением с напорной и сливной гидролини ми , и клапаны типа ИЛИ l J.A hydraulic winch of a boom crane is known, containing two hydraulic motors of various sizes, connected by hydrolines through a hand-operated hydraulic valve with pressure and drain hydraulic lines, and valves of type OR l J.

Недостатком этого гидропривода вл етс сравнительно низка производительность .The disadvantage of this hydraulic drive is relatively low productivity.

Цель изобретени - увеличение производительности гидропривода лебедки путем автоматизации переключени скорости работы.The purpose of the invention is to increase the capacity of the winch hydraulic drive by automating the switching of the speed of operation.

Дл достижени цели он Снабжен дополнительным гидрораспределителем с подпружиненным золотником дл избирательного соединени в каждой из своих двух позиций гидролинийTo achieve the goal, it is equipped with an additional valve with spring-loaded valve for selective connection in each of its two positions.

одного из гидромоторов с напорной и сливной гидролини ми и замыкани гидролиний другого гидромотора между собой, управл ющим гидроцилиндром, поршень которого снабжен плунжером, а рабоча полость разделена перегородкой на две камеры, причем поршень кинематически св зан с подпружиненным золотником дополнительного гидрораспределител , а кажда из one of the hydraulic motors with pressure and drain hydrolines and the closing of the hydrolines of the other hydraulic motor among themselves, controls the hydraulic cylinder, the piston of which is equipped with a plunger, and the working cavity is divided by a partition into two chambers, with the piston

10 двух камер сообщена с соответствующим гидромотором через клапан типа ИЛИ, установленный между гидролини ми этого гидромотора, и через дроссель и обратный клапан - со слив15 ной гидролинией.10 two chambers communicate with the corresponding hydraulic motor through an OR-type valve installed between the hydrolines of this hydraulic motor and through a throttle and non-return valve with a drain of the hydraulic line.

На чертеже показана гидравлическа схема гидропривода.The drawing shows the hydraulic circuit of the hydraulic drive.

Гидропривод состоит из насоса 1, соединенного гидролини ми через The hydraulic drive consists of a pump 1 connected by hydrolines through

Claims

20 rotating connection 2 with the hydraulic distributor 3. The manually activated hydraulic distributor 3 connects the pump pressure hydroline and the drain hydroline to the hydraulic motors C and S via an additional valve 6 provided with a return spring, and through check valves 7 and throttles 8 with chambers A and A. B of the working cavity of the control hydraulic cylinder 9. Chamber A and B of the hydraulic cylinder are connected to valves of the type OR 10 connected between the hydraulic lines of the hydraulic motors and 5. The hydraulic motors operate on one shaft of the reducer 11 and the winch drum 12. K OMe order IME winch, a hydraulic breaker. 13 drum brakes regulating the hydraulic equipment (1.-19, filter 20 and tank 21. The hydraulic actuator works as follows. When the hydraulic distributor 3 is displaced from the central position, the working fluid flows to the hydraulic motor i of a small volume and hydraulic breaker 13 The hydraulic lines of the hydraulic motor 5 are interconnected and it does not impede movement. If the load on the hook exceeds a predetermined value, the pressure in the hydraulic line of the hydraulic motor C affects the piston of the control piston in chamber A the cylinder 9, overcomes the resistance of the return spring and places the hydraulic distributor 6 in the right position. In this case, a larger motor 5 is connected to the pressure and drain hydrolines, and the hydraulic lines of the hydraulic motor are interconnected. The speed and pressure in the pressure hydroline decrease, however divider 6 remains in the right position under the pressure of the working fluid over a large area of the piston in chamber B. After the load is removed, the gyro distributor returns to the left position under the action of the return spring s. Technical and economic efficiency consists in increasing the winch productivity by automatically switching the speed of rotation of the drum, depending on the hook load. Claims The hydraulic actuator of a boom crane winch contains two hydraulic motors of various sizes connected by hydrolines through a hand-operated hydraulic valve with pressure and drain hydraulic lines and OR type valves, characterized in that, in order to increase winch productivity by automating shifting speeds, hydrodistributing tele with spring-loaded spool for selective connection in each of its two positions the hydrolines of one of the hydraulic motors with pressure and discharge Hydrolines and closures of the hydrolines of another hydraulic motor between themselves control the hydraulic cylinder, the piston of which is equipped with a plunger, and the working cavity is divided by a partition into two chambers an OR-type valve installed between the hydrolines of this hydraulic motor and through a throttle and non-return valve with a drain hydroline. Sources of information taken into account in the examination 1, Construction, road and utility engineering, ser. 11 Excavators and jib cranes. Overview information, vol 1 Feature of the development of hydraulic jib self-propelled cranes. M ,, 1979 p. 35, Fig. k.

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