Improved jack
A jack and column technology, applied in the field of improved jacks and hydraulic lifting machinery, can solve the problems of high machining accuracy, inability to withstand high pressure, short working life, etc., to reduce medium leakage, prolong working life, and work conditions. reliable results
Inactive Publication Date: 2018-05-01
宁波泰芸电气有限公司
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Problems solved by technology
The combined sealing elements developed in recent years are essentially O-rings and Yx-shaped sealing rings that dissimilate rigid material ring supports. The sealing mechanism is basically the same as that of elastic material seals such as O-rings and Yx-rings. All the same, the sealing effect is not very ideal, there has been a problem of medium leakage, and it cannot withstand high pressure
Instabilities also occur during operation of existing hydraulic jacks due to ring supports of rigid material
Especially when two or more combined sealing elements are used at the same time, the number of rigid material ring support parts is actually increased, and the difficulty of manufacturing and processing the main engine is increased. High processing accuracy is required, resulting in a substantial increase in the cost of hydraulic jacks
Existing hydraulic jacks are prone to medium leakage, low reliability and stability, and short working life
Method used
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Embodiment Construction
[0018] figure 1 Shown is a new type of jack with a composite sealing system composed of an n-shaped sealing ring 5, a channel hole 4 and a combined sealing element 8 only for sealing between the piston cylinder 3 and the inner cylinder liner 2.
[0019] An improved jack piston cylinder 3 is provided with at least one n-shaped sealing ring 5 and at least one combined sealing element 8, and a plurality of channel holes 4 are provided on the end surface of the piston cylinder 3 to lead to the placement groove of each n-shaped sealing ring 5, Guide the medium into the inner cavity of the n-shaped sealing ring 5, so that the inner cavity of the n-shaped sealing ring 5 is filled with medium; a channel hole 4 communicates with a plurality of n-shaped sealing rings 5 placement grooves or a channel hole 4 communicates with an n-shaped sealing ring The sealing ring 5 placement grooves communicate with each other. The composite sealing system composed of the n-shaped sealing ring 5 , ...
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The invention relates to the technical field of mechanical equipment manufacturing, and discloses an improved jack. The improved jack has the advantages that a composite sealing system composed of ann-shaped sealing ring and a combined sealing element is adopted to realize sealing between a piston column body and an inner cylinder sleeve, during the working period of the jack, the pressure of a working medium extrudes the sealing ring body from the inner cavity of the n-shaped sealing ring to expand outwards to realize sealing, the sealing effect is better when the pressure is higher, leakageof the medium is greatly reduced, the better sealing effect is obtained, the service life is prolonged, due to the fact that the sealing mechanism of the n-shaped sealing ring is the self-dynamic balance of the pressure of the working medium, the machining precision of a main machine is not required to be increased by adopting the n-shaped sealing ring, no influence is caused to the working condition of the combined sealing element in the composite sealing system, so that the novel jack has a double-sealing effect of the n-shaped sealing ring and the combined sealing element, compared with anexisting hydraulic jack, the improved jack has the characteristics of being lower in medium leakage, better in sealing effect, more reliable in working condition, and more stable.
Description
technical field [0001] The invention relates to a hydraulic lifting machine, in particular to an improved jack, which belongs to the technical field of mechanical equipment manufacturing. Background technique [0002] As we all know, the existing hydraulic jack, the dynamic seal between the piston cylinder and the cylinder liner has been using O-ring, Yx-ring and combined sealing element sealing technology to solve the medium leakage problem for a long time. In the sealing technology of rubber seals such as O-rings and Yx-rings, when the hydraulic jack is working, the pressure of the working medium is squeezed from the outside of the sealing ring to make it close to the cylinder liner and piston cylinder to achieve sealing. The element is easily damaged during the relative movement with the cylinder liner, resulting in medium leakage. Due to the low yield rate of the elastic material, if the pressure of the working medium is too high, the sealing element will be deformed, th...
Claims
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Login to View More IPC IPC(8): B66F3/26B66F3/25
CPCB66F3/26B66F3/25
Inventor 陈杰
Owner 宁波泰芸电气有限公司