SU387119A1 - MINE HYDRAULIC POST - Google Patents

Description

one

The invention relates to mining and can be used in coal engineering in the design of hydraulic racks and vertical jacks with manual transmission.

Mine hydraulic pillars are known, including a housing, a sliding part, a central tube with a collar, a safety and unloading valve, a drive mechanism and a pump with a piston, a high pressure cylinder and a non-movable shaft with an internal cavity.

The proposed hydraulic shaft rack differs from the known ones in that its pump is equipped with a floating tube, a plunger installed in a high-pressure cylinder and interacting with the collar of the central tube and the shank. The plunger of the proposed pump is made with radial grooves communicating a high pressure cylinder with an internal cavity of the shank.

This embodiment provides a reduction in the torque of the torque in the drive mechanism.

The reduction of torque in the drive mechanism is achieved by separating the forces when the working fluid is injected from the low pressure chamber and from the high pressure chamber. When the working fluid is pumped out of the low pressure chamber, the pumping group moves downwards and from the high pressure chamber upwards. The installation of a floating plunger of various sizes allows for a wide adjustment of the pump performance depending on the gorgeological conditions of use of the Stokes, and also simplifies the manufacturing technology.

The drawing shows the proposed structural layout of the rack. The rack has a body /, sliding part 2,

central tube 5 with shoulder 4, safety - unloading valve 5, drive mechanism 6 and pumping soil 7 with piston 8, high pressure cylinder 9 and fixed shaft 10 with internal

cavity 11.

The rack is extended by a low pressure piston 8 by means of a drive mechanism 6 when the pump group 7 is moved downward due to the flow of working fluid.

from the low pressure chamber 12 through the valves 13 and 14 into the cavity 15. The rack is deployed due to the area of the floating plunger 16 and the fixed shank 10, displacing the working fluid

from the high-pressure chamber 17 when moving the pump group 7 upwards by means of a drive mechanism into the cavity 15. The floating plunger 16 with radial grooves 18 in the lower part provides free flow of fluid from the high chamber

pressure 17 into the working cavity when the strut spreads through the internal cavity of the shank P.

Subject invention

Claims (2)

1. A hydraulic shaft rack comprising a housing, a sliding part, a central tube with a collar, a safety and unloading valve, a drive mechanism and a pump with a piston, a high pressure cylinder and a fixed shank with an internal a cavity, characterized in that, in order to reduce the steepness of its torque in the drive mechanism, the pump of the rack is equipped with a floating device, a plunger installed in the high pressure cylinder and interacting with the collar of the central tube and the shank. 2. A stand according to claim 1, characterized in that the floating plunger is made with radial grooves that connect the high-pressure cylinder with the internal cavity of the shank.