Floating sleeve and hydraulic cylinder
A floating sleeve and hydraulic cylinder technology, applied in the field of floating sleeves, can solve problems such as locking, affecting the normal operation of the system, increasing the structural complexity and cost of the hydraulic cylinder, and achieving the effect of avoiding locking
Pending Publication Date: 2020-12-29
BOSCH REXROTH (CHANGZHOU) CO LTD
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Problems solved by technology
For example, when a single floating sleeve is used, because its application environment is usually a high-pressure oil cylinder, if the oil pressure is too high during work, it is easy to cause the high-pressure oil to lift the end of the floating sleeve near the downstream side until it hugs the cylinder. dead, thus affecting the normal operation of the entire system
When two floating sleeves are used to achieve one-way sealing respectively, the locking phenomenon can be avoided, but the structural complexity and cost of the hydraulic cylinder will also be correspondingly increased
Method used
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Embodiment Construction
[0011] Please refer to Figure 1 to Figure 3 As shown, it provides an embodiment of a floating sleeve. The floating sleeve 100 is generally sleeved on the piston 220 of the double-acting hydraulic cylinder, and is used to provide a seal between the cylinder 210 and the piston 220 . The floating bushing 100 includes an annular bushing body 110 . In this application, in order to facilitate the description of the relationship between the structure and the position, the orientation of the floating sleeve body 110 is followed by the following coordinates. That is, the floating sleeve body 110 has a first side 110 a oriented along the axial direction X and an opposite second side 110 b ; and it has an inner side 110 c and an outer side 110 d oriented along the radial direction Y. More importantly, one or more radial through holes 120 are provided on the annular bushing body 110 , and the radial through holes 120 communicate with the outer side 110 d and the inner side 110 c of the...
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The invention provides a floating sleeve and a hydraulic cylinder. The floating sleeve is used for sealing a piston and comprises an annular bushing body. The annular bushing body is provided with a first side, a second side, an inner side and an outer side, the first side is oriented in an axial direction, the second side is opposite to the first side, and the inner side and the outer side are oriented in a radial direction. One or more radial through holes are formed in the annular bushing body, and the radial through holes communicate with the outer side and the inner side of the annular bushing body in the radial direction. According to the technical scheme, double-acting sealing of the piston is achieved. Under the arrangement, no matter which side of the hydraulic cylinder pressure oil comes from, the oil with certain pressure drop can flow from the outer side of the floating sleeve to the inner side, close to the piston, of the floating sleeve through the radial through holes, the floating sleeve deforms along with the pressure change so as to achieve gap sealing, and meanwhile, the phenomenon that the floating sleeve and a cylinder barrel are locked in the running state ofhigh-pressure oil can be avoided.
Description
technical field [0001] The present application relates to the hydraulic field, and in particular to a floating sleeve for sealing a piston in a hydraulic cylinder. Background technique [0002] Double-acting hydraulic cylinders are often used as drive components in powertrains. It refers to a type of hydraulic cylinder that can input pressure oil from both sides of the piston. During the transmission of the pressure oil, in order to ensure the sealing of the piston, usually a floating sleeve should be provided on the transmission path of the pressure oil to assist in realizing its double-acting seal. However, the design of floating sleeves in an application incorporates several considerations. For example, when a single floating sleeve is used, because its application environment is usually a high-pressure oil cylinder, if the oil pressure is too high during work, it is easy to cause the high-pressure oil to lift the end of the floating sleeve near the downstream side unti...
Claims
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IPC IPC(8): F15B15/14F15B15/20F16J9/20
CPCF15B15/1452
Inventor 徐光月朱敏马秀坤周文
Owner BOSCH REXROTH (CHANGZHOU) CO LTD