A new sealing device for hydraulic cylinder
A sealing device and hydraulic cylinder technology, which is applied to fluid pressure actuating devices, engine seals, engine components, etc., can solve the problems of affecting working accuracy, poor sealing performance, and low service life, and achieve convenient installation and increase sealing performance. , the effect of long life
Inactive Publication Date: 2017-03-15
NANJING INST OF TECH
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Problems solved by technology
[0002] The use of hydraulic cylinders in the work of bending machines or shearing machines will affect their working accuracy
The existing hydraulic cylinder seals have been using various types of rubber seal rings, relying on the elasticity of the rubber rings to achieve the sealing effect, but the disadvantages of this type of seal are poor wear resistance and easy aging deformation, resulting in poor sealing performance and low service life
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Embodiment Construction
[0019] The present invention will be further described below in conjunction with the accompanying drawings.
[0020] A new sealing device for a hydraulic cylinder, comprising a cylinder body 2, a piston rod 1, a seal 3 and a retaining ring 4, characterized in that it also includes a lip seal ring structure, the lip seal ring structure consists of an annular seal groove 8 and The vertical section of the annular sealing groove 8 is rectangular, and the bottom has an annular boss 801. The vertical section of the lip sealing ring 5 is a right-angled trapezoidal structure. Annular grooves 501 and 502 are respectively arranged on the sides, and the annular groove 502 on the bottom edge of the lip seal 5 cooperates with the annular boss 801 of the annular sealing groove 8, and the right-angled waist of the right-angled trapezoid and the annular seal The upper side wall of the groove 8 cooperates, and the upper base of the right-angled trapezoid cooperates with the piston rod 1 .
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The invention discloses a novel sealing device of a hydraulic cylinder. The device comprises a cylinder body, a piston rod, a sealing piece and a stop ring, and further comprises a lip-shaped sealing ring structure, wherein the lip-shaped sealing ring structure consists of an annular sealing groove and a lip-shaped sealing ring; the vertical section of the annular sealing groove is rectangular; an annular boss is arranged at the bottom of the annular sealing groove; the vertical section of the lip-shaped sealing ring is a right-angled trapezoid structure; annular grooves are respectively formed in the right-angled waist and the lower bottom edge of the right-angled trapezoid; the annular groove in the lower bottom edge of the lip-shaped sealing ring fits the annular boss of the annular sealing groove; the right-angled waist of the right-angled trapezoid fits the upper side wall of the annular sealing groove; and the upper bottom edge of the right-angled trapezoid fits the piston rod. The lip-shaped sealing ring is better in sealing effect compared with a one-edge sealing ring; the trapezoidal sealing ring can achieve a sealing effect, and can generate an extruding effect on the lip-shaped sealing ring to further improve the sealing performance; a dustproof sealing ring is longer in service life; and the sealing device is convenient for installation, and is compact and reasonable in structure.
Description
technical field [0001] The invention relates to a novel sealing device for a hydraulic cylinder, which belongs to the technical field of sealing. Background technique [0002] The use of hydraulic cylinders in the work of bending machines or shearing machines will affect their working accuracy. Existing hydraulic cylinder seals have been using various types of rubber sealing rings, relying on the elasticity of the rubber rings to achieve the sealing effect, but the disadvantages of this type of sealing are poor wear resistance and easy aging deformation, resulting in poor sealing performance and low service life. Due to the relatively high working pressure and the frequent reciprocating movement of the piston rod, the traditional sealing ring can be avoided when designing and installing the sealing device, so as to improve its sealing effect. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the purpose of this invention is to provide a new s...
Claims
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IPC IPC(8): F15B15/08F16J15/3204F16J15/3284
Inventor 张杰万化云李宗靖
Owner NANJING INST OF TECH