SU543763A1

SU543763A1 - Power cylinder shaft lining

Info

Publication number: SU543763A1
Application number: SU2022400A
Authority: SU
Inventors: Эдуард Иванович Федотов; Алексей Дмитриевич Гридин; Владимир Викторович Старичнев; Тамара Семеновна Подохина; Николай Владимирович Сологубов; Вячеслав Викторович Вавилов; Александр Васильевич Акулин
Priority date: 1974-05-05
Filing date: 1974-05-05
Publication date: 1977-01-25

Description

(54) СИЛОВОЙ ГИДРОЦИЛИНДР ШАХТНОЙ КРЕПИ(54) FORCE HYDROCILINDER MINE SHAFT

1one

Изобретение относитс к силовым гидроцилиндрам двойной раздвижности, преимущественно дл использовани в шахтных механизированных креп х горной, промышленностиThe invention relates to double-slip power cylinders, mainly for use in mine mechanized crepe mining, industry

Известен силовой гидроцилиндр шахтной крепи, имеющий корпус, шток с поршнем и винт с гайкой, укрепленной в поршне и выполненной с внутренней несамотормоз щейс резьбой.A shaft cylinder power cylinder is known, having a housing, a piston rod and a screw with a nut fastened in the piston and made with an internal non-self-braking thread.

Такое выполнение силового гидроцилинд- ра не обеспечивает сохранение посто нного сопротивлени при двухступенчатой раздвижке и складывании.This embodiment of the power cylinder does not ensure the preservation of constant resistance in the two-stage expansion and folding.

Цель изобретени - обеспечить сохранение посто нного сопротивлени при двухступенчатой раздвижке и складывании.The purpose of the invention is to ensure the preservation of constant resistance in a two-stage expansion and folding.

Дл этого предлагаемый гидроцилиндр снабжен плунжером р внутренней резьбой, а гайка порщн выполнена с наружной несамотормоз щейс резьбой, котора сопр жена с резьбой плунжера. Причем дл предотвращен штока от проворачивани и прохода рабочей жидкости из полости плунжера в поршневую полость, винт выполнен с пазом, а поршень For this purpose, the proposed hydraulic cylinder is provided with a plunger p with an internal thread, and the nut of the valve is made with an external non-braking thread, which is coupled with the thread of the plunger. Moreover, to prevent the rod from turning and the working fluid from the piston cavity into the piston cavity, the screw is made with a groove, and the piston

снабжен шипом, который вставлен в паз с зазором .Equipped with a spike that is inserted into a groove with a gap.

На фиг. 1 изображен силовой гидроцилиндр шахтной крепи, разрез; на фиг. 2 - сечение А-А на фиг. 1.FIG. 1 depicts a power cylinder shaft lining, section; in fig. 2 is a section A-A in FIG. one.

Claims

The hydraulic cylinder has a housing 1, a piston 2 of the first stage and its rod 3, a telescopic screw transmission including a plunger 4 of the second stage, a fixed screw 5, a rotating nut 6. The nut 6 on the outside and inside has non-braking threads of different directions. The external thread of the nut 6 interacts with the internal thread of the plunger 4, and the internal thread with the external thread of the screw 5. A valve block 7 is attached to the body 1, consisting of safety valve 8 and controllable return valve 9. Piston cavities 10 of the hydraulic cylinder through channel 11, valves 8 and 9 are connected to the supply line 12, and the supply line 13 to the junction cavity 14. The piston cavities 10 communicate with each other by channels 15 and 16. The nut 6 is fixed in the piston 2 by means of a bearing 17. The screw 5 is fixed and hermetically fixed in the bottom of the housing 1. So as provided rotation of the nut 6 only takes place, then the piston 2 of the first stage is provided with a spike: ohm 18, and its rod has a 3-key 1E, is reciprocating, they have longitudinal key grooves 20 and 21. the gap, which serves as an additional channel for communication of the piston cavities of both stages, the power cylinder works as follows. In order to ensure the direct flow of the hydraulic cylinder rod, the main line 13 is connected to the drain, and the main line 12 is connected to the head. Under the action of the pressure of the working fluid entering the piston cavities Yu, the piston 2 and the plunger 4 move upwards. For forced folding, line 13 is connected to the pressure, and the line is drained. In this case, the working fluid under pressure enters the rod cavity 14 of the IG, acting on top of the piston 2, moves it down. Together with the piston 2, the nut 6 is moved downwards, its si-jyTrm reamer is located in the threadset of the fixed screw 5, and the sleeve is rotated and screwed into the thread of the plunger 4, as a result of which the plunger is lowered. The folding under the action of the pressure forces of the mountain massif is accompanied by the consistent lowering of the pistons and the discharge of fluid from the piston cavities 10 through the safety valve 8 into the line 12 connected to the drain. A characteristic feature of the forward stroke of the hydraulic cylinder rod is that the screw transmission acts as a transmission of forces from the piston 2 to the plunger 4 and the mechanical adder of the forces and displacements of both CTjmeHei partitions. The same effect is ensured by lowering the steps under the action of external forces with the only difference that the force transmitted in reverse sequence from the piston. When performing these operations, the maximum and constant force of the forward stroke of the hydraulic cylinder rod and the resistance when it is folded is provided. The formula of the invention of the 1-o Power shaft hydraulic cylinder, having a housing, a piston rod and a screw with a nut fixed in the piston and threaded with an internal non-braking thread, characterized in that in order to maintain constant resistance during a two-stage expansion and folding, the hydraulic cylinder It is equipped with an internal thread plunger, and the piston nut is made with an external non-braking thread, which is associated with the thread of the plunger.

2. A hydraulic cylinder according to claim 1, characterized in that, in order to prevent the piston from turning and the working fluid from the plunger cavity into the piston cavity, the screw is made with a groove, and the piston is provided with a spike that is inserted into the groove with a gap.

21

Fa D.2.