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Hydraulic pressure stabilizing valve

A pressure-stabilizing valve and hydraulic technology, applied in the field of hydraulic pressure-stabilizing valve, can solve the problems of slow response, difficult to achieve pressure fluctuation, limited minimum response time of solenoid valve, etc., to achieve the effect of improving stiffness and increasing adjustment range

Active Publication Date: 2021-03-19
CHONGQING HONGJIANG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional high-pressure common rail fuel system mainly maintains the stability of the rail pressure by matching the electronically controlled proportional fuel inlet valve with the fuel injector, but the response is slow, and the pressure fluctuation is difficult to achieve a more ideal state
Traditional high-pressure common rail fuel mainly reduces system pressure fluctuations by increasing the volume of the common rail pipe. When the volume of the common rail is increased, the manufacturing cost of the common rail increases greatly, but it is difficult to achieve because of its space elasticity; Control pressure regulating valve, but because the solenoid valve always has the problem of limited minimum response time, in some cases in the experiment, the pressure fluctuation of this regulation method can reach more than 20Mpa, and at the same time, the large electronic control pressure regulation also has the problem of short life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 1 to Figure 7The hydraulic pressure stabilizing valve shown is composed of valve body 1, spool 2, butterfly spring 3, spring mandrel 4, sealing ring 5, positioning sleeve 6, valve cover 7, control piston 8, pressure regulating gasket 9, regulating valve Press screw 10 to form.

[0047] The lower end of the valve body 1 is provided with a ball head 11, and the middle is provided with the first middle hole 12 of the valve body, the second middle hole 14 of the valve body, and the third middle hole 17 of the valve body. The first middle hole 12 of the valve body and the second middle hole of the valve body The first shoulder 110 of the valve body is arranged between the middle holes 14, the second positioning shoulder 19 of the valve body is arranged between the second middle hole 14 of the valve body and the third middle hole 17 of the valve body, and the valve body hexagonal 14, The first thread 13 of the valve body and the second thread 16 of the valve ...

Embodiment 2

[0055] Such as Figure 8 As shown, in the case where frequent adjustment is not required, in Embodiment 1, under the condition that other conditions remain unchanged, the pressure regulating screw 10 can be canceled, the sixth threaded hole 76 on the valve cover 7 can be canceled, and the fifth screw thread of the valve cover can be removed. The hole 710 is set as the leakage oil return passage; at the same time, a piston oil return through hole 89 is added to the upper end surface of the control piston 8 to provide a macro oil passage for the system; the lift hole is designed as a through hole 810 to reduce the processing cost.

[0056] When disc spring 3 rigidity is not enough, when disc spring 3 is installed, also can first overlap in the same direction to form a spring group and then oppositely install as Figure 8 . The stiffness of the spring assembly can be increased after the belleville springs are overlapped in the same direction, thereby increasing the bearing capacit...

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Abstract

The invention discloses a hydraulic pressure stabilizing valve. The hydraulic pressure stabilizing valve is mainly composed of a valve body, a valve element, a positioning sleeve, a valve deck, a control piston, a spring and the like. During work, the hydraulic pressure stabilizing valve is connected with a high-pressure rail pipe through a thread and a ball head below the valve body, high-pressure oil is led into a first middle hole of the valve body, the slidable valve element pressed by a belleville spring is mounted in the first middle hole of the valve body, and the valve element and thefirst middle hole of the valve body form a larger elastic deformation volume. the control piston, the valve deck, a pressure adjusting screw and other parts are arranged above the belleville spring and used for pressing the belleville spring and adjusting the pre-tightening force. And when the belleville spring is replaced with a spiral spring, the hydraulic pressure stabilizing valve can also beapplied to a lower hydraulic system. According to the hydraulic pressure stabilizing valve, the larger elastic variable volume is additionally formed on a high-pressure oil duct, impact pressure wavescaused by sudden change of flow are consumed, and an auxiliary electric control hydraulic adjusting system enables system hydraulic pressure to reach a more stable state.

Description

technical field [0001] The invention belongs to the technical field of high-pressure common rail fuel systems, and in particular relates to a hydraulic pressure stabilizing valve. Background technique [0002] The electronically controlled common rail fuel system can realize precise control of fuel injection timing and cycle fuel injection volume, and is one of the effective means for diesel engines to achieve high fuel economy and low harmful emissions. Since the rail pressure has a great influence on the injection quantity, how to stabilize the rail pressure has always been concerned by the industry, even as an important indicator of the maturity of the high-pressure common rail fuel system. The traditional high-pressure common rail fuel system mainly maintains rail pressure stability by matching the electronically controlled proportional fuel inlet valve with the fuel injector, but the response is slow, and the pressure fluctuation is difficult to achieve a more ideal sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F16K47/02F16K27/08
CPCF15B13/021F15B13/023F16K27/08Y02E10/20
Inventor 侯旭洪刘洋李鹏豪张永林卢训李文杰贾波凯范希杰
Owner CHONGQING HONGJIANG MACHINERY