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Pressure relief valve

An external sealing and component technology, applied in the field of pressure reducing valves, can solve problems such as difficult matching

Active Publication Date: 2008-08-13
斯泰克普尔国际工程产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If used as a pressure reducing valve, the independent nature of each valve would require the individual valves to be used as pressure reducing valves spaced in series, making it difficult to match their operation to precisely regulate pressure

Method used

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Examples

Experimental program
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Embodiment Construction

[0013] Referring to FIGS. 1 and 2 , the engine oil supply system includes a pump P having an impeller V driven by the engine and rotating within a pump housing H. Referring to FIG. Oil is drawn into the pump casing through inlet I and delivered to supply port S. A bypass B is provided between the supply port S and the inlet I to allow recirculation of oil from the supply port S to the inlet I. A valve 10 controls the flow of oil through the bypass B, is open to allow oil flow when the pressure in the supply port S exceeds a predetermined value, and closes when the oil pressure drops below this value. In many installations, pump P is mounted high on the engine and draws oil from a sump under the engine through inlet I into pump housing H.

[0014] Valve 10 generally includes a valve housing 12 having a pressure inlet 14 connected to supply port S and an outlet 16 connected to bypass B. As shown in FIG. The inlet 14 and outlet 16 are axially separated along a stepped bore 17 ....

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PUM

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Abstract

The invention discloses a double plunger valve, which has an inner plunger and an outer plunger nested in a hole of a valve housing. The valve housing has an inlet and an outlet fluidly connected by a bore and sealed to each other by the plunger biased toward respective sealing surfaces by a pair of internested biasing elements positioned between the inlet and the outlet. The outer plunger is slidable within the bore and has an inwardly extending lip. The inner plunger is slidable within the outer plunger between a sealing position and a second position, wherein the inner plunger is in contact with the lip in the second position. Pressure within the inlet high enough to overcome the force of the biasing element causes the inner plunger to slide within the outer plunger to its second position, which will then also begin to slide within the bore to release the seal between the inlet and outlet.

Description

technical field [0001] The invention relates to a pressure reducing valve used in a fluid system. Background technique [0002] Pressure reducing valves used in fluid systems are typically one-way valves designed to conduct at a specific pressure to avoid damage to the system. For example, pressure relief valves are used in an engine's lubrication system to relieve excess pressure that may build up in the oil pump as engine speed increases or downstream of the pump when unpredictable throttling occurs. form. [0003] Pumps used in fluid systems are susceptible to contamination. When it is used in an engine, the pollution usually comes from within the engine and may include particles of iron, aluminum, sand, and the like. Despite the use of filters and inlet screens, the system was designed on the assumption that some particles of contaminants would reach the pump, so the system was designed such that contaminants would pass through the pump without issue. [0004] Conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/22F04B53/10F16K17/04
CPCF16K17/065F04B49/03F16K17/164F16K17/044Y10T137/7846F16K17/0406
Inventor 埃里克·科曾斯保罗·莫顿
Owner 斯泰克普尔国际工程产品有限公司