One-way cushion overflow valve and closed-type hydraulic pump

A one-way valve and relief valve technology, which is applied in the hydraulic field to achieve the effect of small pressure fluctuation and stable pressure rise

Active Publication Date: 2015-12-09
杭州力龙液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a one-way buffer overflow valve and a closed hydraulic pump to solve the problem of

Method used

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  • One-way cushion overflow valve and closed-type hydraulic pump
  • One-way cushion overflow valve and closed-type hydraulic pump
  • One-way cushion overflow valve and closed-type hydraulic pump

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] Combine below Figure 1 to Figure 5 , to further describe the preferred first embodiment of the present invention in detail,

[0028] Such as figure 1 As shown, in the preferred first embodiment of the one-way buffer overflow valve, the one-way valve core 8 and the overflow valve seat 4 are installed in the inner cavity of the one-way valve seat 5, and the lower end of the one-way valve seat 5 There are oil inlet P and oil return port T, the end of the one-way valve core 8 is located at the intersection of the oil inlet P and the oil return port T, the end of the one-way valve core 8 is against the oil inlet P, and the oil inlet Port P and oil return port T are blocked by one-way valve ...

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Abstract

The invention discloses a one-way cushion overflow valve. The end of a one-way valve core is provided with a first throttling orifice, and the first throttling orifice is communicated with an oil inlet and a return spring cavity; a pressure-regulation spring cavity is arranged in an overflow valve seat; an overflow valve stem, a regulating screw and a pressure-regulation spring are installed in the pressure-regulation spring cavity; both ends of the pressure-regulation spring respectively abut against the overflow valve stem and regulating screw; one end of the overflow valve seat is provided with a valve stem hole and an oil passing hole; the valve stem hole is communicated with the return spring cavity and pressure-regulation spring cavity; the end of the overflow valve stem is matched with the valve stem hole; the oil passing hole is communicated with an oil passing cavity and the pressure-regulation spring cavity; and a second throttling orifice is communicated with the return spring cavity and pressure-regulation spring cavity, and arranged in the overflow valve seat or overflow valve stem. The invention also discloses a closed-type hydraulic pump. Under the combined actions of the first throttling orifice and second throttling orifice, the fluctuations in the pressure rise and fall process are reduced, so that the pressure rise and fall of the hydraulic circuit can be more stable.

Description

technical field [0001] The invention relates to the hydraulic field, in particular to a one-way buffer overflow valve and a closed hydraulic pump. Background technique [0002] The relief valve is a pressure control valve, its control input is the pre-compression of the pressure regulating spring, and its output is the controlled pressure of the valve inlet. The most common use is to set the relief valve in parallel in the closed hydraulic pump and closed hydraulic system, as a bypass of the main hydraulic oil circuit, and form a constant hydraulic source together with the closed hydraulic pump. The highest pressure at the outlet of the closed hydraulic pump can be controlled by adjusting the pre-compression of the pressure regulating spring of the overflow valve. [0003] At present, when the relief valve is in use, there is a load blockage, which causes the pressure of the closed hydraulic pump and the hydraulic system to rise rapidly instantaneously, and is easy to damag...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 孙强李胜虎杨信
Owner 杭州力龙液压有限公司
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