High-pressure resistant groove-type sealing strip of rotating-vane type hydraulic cylinder
A hydraulic cylinder, groove type technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem that the groove type sealing strip cannot compensate the sealing gap in time, achieve small size, improve working pressure, and mechanical efficiency. high effect
Inactive Publication Date: 2012-12-05
XINGHUA KAIYUAN MARINE MACHINERY
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the above-mentioned existing groove type sealing strip that cannot timely compensate the sealing gap caused by the pressure change, and design a seal that can freely expand and contract in the oil cylinder sealing groove to automatically compensate the sealing gap, and significantly improve the hydraulic pressure of the rotary vane type. High pressure resistant groove type sealing strip for oil cylinder working pressure
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[0014] The accompanying drawings disclose several specific embodiments of the present invention without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.
[0015] See attached Figure 1~4 , the high-pressure resistant groove-type sealing strip of the rotary vane hydraulic cylinder of the present invention is mainly based on the existing groove-type sealing strip composed of groove 1, side 2 and bottom 5, and at least 1 stepped butt joint expansion joint 3 and 4, the bottom seam 4 of the stepped butt joint expansion joint is a stepped flat joint (such as Figure 5~7 shown) or stepped tenon joints (such as Figure 8 shown) or a combination of flat and tenon joints (such as Figure 9~16 shown).
[0016] The side seam 3 of the step butt joint expansion joint is a flat joint (such as Figure 5~6 ) or stepped butt joints (such as Figure 7 , 11 , 13, 15) or stepped tenon joints or combination joints of flat j...
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The invention provides a high-pressure resistant groove-type sealing strip of a rotating-vane type hydraulic cylinder. At least one step-butt type expansion joint is additionally arranged on the basis of the traditional groove-type sealing strip; the bottom side gap of the step-butt type expansion joint is a step-type flat joint, step-type tenon joint or combined joint of the flat joint and the tenon joint. The side gap of the step-butt type expansion joint is a flat joint, step-type flat joint, step-type tenon joint or combined joint of the flat joint and the tenon joint. The groove-type sealing strip with unchangeable length can be changed into the groove-type sealing strip with changeable length, so that the groove-type sealing strip is capable of flexing freely in an oil cylinder sealing slot in the rotating-vane type hydraulic cylinder to compensate a sealing gap automatically, and then, the working pressure of the rotating-vane type hydraulic cylinder can be increased; tests prove that the working pressure of the rotating-vane type hydraulic cylinder can be increased to be higher than 15MPa from 8MPa due to the adoption of the high-pressure resistant groove-type sealing strip provided by the invention, so that the high-pressure resistant groove-type sealing strip is beneficial to being widely used in rotating-vane type hydraulic cylinders.
Description
technical field [0001] The invention relates to a rotary vane hydraulic cylinder powered by high-pressure oil used in a hydraulic steering gear of a ship, in particular to a special groove-shaped sealing strip inside the rotary vane hydraulic cylinder, which belongs to the rotary vane hydraulic cylinder. Background technique [0002] The rotary vane hydraulic cylinder that has been used in the existing ship steering gear until now mainly adopts the oil motor structure of rotor and vane, and its structure mainly includes cylinder body, stator, rotating shaft, moving plate, sealing strip, upper cover and lower cover, The moving piece is fixed on the rotating shaft, the cylinder body is set on the outer edge of the moving piece, the fixed piece is installed on the inner wall of the cylinder between the adjacent moving pieces, the upper cover and the lower cover are installed at both ends of the cylinder body and bolted It is fixed on the cylinder body and the fixed piece, and t...
Claims
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IPC IPC(8): F16J15/16
Inventor 吴建东
Owner XINGHUA KAIYUAN MARINE MACHINERY