CN2844494Y

CN2844494Y - High-pressure liquid pump

Info

Publication number: CN2844494Y
Application number: CN 200520098538
Authority: CN
Inventors: 曾尚初; 曾春林; 叶允安; 罗文斌
Original assignee: 曾尚初
Priority date: 2005-10-26
Filing date: 2005-10-26
Publication date: 2006-12-06
Anticipated expiration: 2015-10-26

Abstract

The utility model relates to a high-pressure liquid pump for a fuel system of an internal combustion engine, which is composed of a plunger pump and a pressure converting device, and can be used for pumping any lubricating or non lubricating fluid. The converting device is an integral container which is divided into two chambers by an elastic membrane in a casing, wherein one chamber is communicated with the plunger pump to form a fluid chamber; the other chamber is a pump pressure chamber with an oil inlet and an oil outlet. The plunger pump causes hydraulic oil to be pressed in and pumped out, and the fluid chamber causes the membrane to move in a reciprocating way. Gasoline is sucked in and pressed out through the pump pressure chamber. The utility model has the advantages of high working pressure, no leakage and long service life. Besides, the injection of the gasoline after a gasoline engine is compressed is realized, the heat efficiency is improved, the exhaust pollution is reduced basically, and a carburetor and an electric control gasoline injection system can be replaced or the cost of the non lubricating hydraulic system can be reduced.

Description

A kind of pressure liquid pump

Technical field:

The utility model relates to a kind of high-pressure service pump, especially a kind of pressure liquid pump of internal combustion engine fuel system.

Background technique:

In the internal-combustion engine liquid fuel high-pressure service pump series of prior art, all are the plunger pumps that constitute by plunger, spring, cam, the pump housing.Wherein the fuel system high-pressure diesel pump of diesel engine can only work in the diesel oil of lubricity, and non-lubricity liquid such as water, alcohol, kerosene, gasoline etc. then can not use.

The model utility content:

The purpose of this utility model is to provide a kind of reliable performance, possess the same realization compression ignites such as gasoline, kerosene, alcohol that can spray into to the cylinder inner high voltage of diesel engine plunger pump maybe will have gasoline engine refitting now and spray into gasoline, electrical spark is lighted simultaneously, to replace complex structure, electronically controlled fuel injection system that cost is high, fundamentally reduce the exhaust emission of petrol engine, overall performances such as the thermal efficiency are reached and surpass the diesel engine level.

The scheme that the utility model purpose realizes is: having now by plunger, spring, cam, set up the pressure conversion device of a similar diaphragm pump on the plunger pump basis that the pump housing constitutes, this conversion equipment is by accompanying the corrugated tube shape elastic diaphragm that a plane ripples shape of being made by metal or nonmetal paper tinsel or an end become sealing between the relative mouth end of two half of body shells, it is fastening by sieve silk two halves body shell to be connected, make it to constitute the whole container that is divided into two cavitys in by elastic diaphragm, one of them cavity is the pump pressure cavity of liquid fuel, offer oil inlet hole and oil outlet on the pump pressure cavity body shell wall on one side, advance, oil outlet is to reverse stop valve is housed respectively, between the axis part of elastic diaphragm and the body shell inwall barrier film Returnning spring is housed, another cavity is a hydraulic fluid chamber, and communicates with the plunger pump chamber.Corresponding barrier film Returnning spring position is provided with the barrier film spacing point that resets.

Working principle of the present utility model: be full of gasoline or other liquid fuels in the pump pressure cavity, the plunger pump chamber reaches in the hydraulic fluid chamber that communicates with it and is full of hydraulic oil.The plunger pump cam impels plunger to make axially reciprocating by the machine power transmission.When plunger dwindles when motion towards pump chamber, the hydraulic oil in the pump chamber is pressed in the hydraulic fluid chamber, forces the distortion of elastic diaphragm bulging, and the hydraulic fluid chamber volume diminishes, and gasoline or other liquid fuel pressurizeds are pushed the oil outlet reverse stop valve open and discharged; Plunger is when the swivel motion, under the return spring pressure effect, hydraulic fluid chamber produces negative pressure, the elastic diaphragm returning position, the big generation pull of vacuum of pump pressure cavity volume phase strain, outer gasoline or other liquid fuels of oil inlet hole pushed the oil inlet hole reverse stop valve open under atmospheric pressure or pressurization, fill gasoline in pump pressure cavity.

Advantage of the present utility model: gasoline or other liquid fuels produce volume-variation at pump pressure cavity by elastic diaphragm distortion and carry, and are to obtain pump pressure kinetic energy, the nothing leakage at the pump pressure cavity of the moving link that not have to rub relatively.The pump pressure kinetic energy of pump pressure cavity is to be converted into the hydraulic pressure energy by mechanical energy by plunger pump, transmission obtains through elastic diaphragm, the relative two surface pressure phase isoequilibriums of elastic diaphragm, be free deformation, can be because of the working pressure height destroys, so can be in the continuous operation of existing hydraulics Maximum operating pressure state.Satisfy the required jet pressure of internal-combustion engine " compression ignite " fully.Because plunger pump can be used the hydraulic oil higher than diesel oil viscosity, it is better lubricated that plunger can be obtained, and hydraulic oil does not consume substantially in the plunger pump, and working life is longer than existing diesel oil high-pressure service pump.

Description of drawings:

Fig. 1 is first embodiment's of the utility model a structure sectional view.

Fig. 2 is another embodiment's of the utility model a structure sectional view.

Embodiment:

As shown in Figure 1, the present embodiment pressure liquid pump is made up of plunger pump and pressure conversion device two-part.Constitute plunger pump by plunger 1, spring 14, cam 13, the pump housing.Pressure conversion device is to constitute shell by two half of body shells 1, accompanying plane ripples shape elastic diaphragm 3 backs of being made by metal foil between two individual shell 1 relative mouths are held connects two individual shells 1 fastening with sieve silk 8, make it to constitute the whole container that is divided into two cavitys in by elastic diaphragm 3, one of them cavity is the pump pressure cavity 7 of liquid fuel, offer oil inlet hole 2 and oil outlet 6 on this pump pressure cavity 7 body shell 1 wall on one side, reverse stop valve 17,5 is housed respectively in oil inlet hole 2 and the oil outlet 6; Another cavity is a hydraulic fluid chamber 16, and this hydraulic fluid chamber 16 communicates with plunger pump chamber 10 by oil-piping 9, is provided with the barrier film limit dais 15 that resets at hydraulic fluid chamber 16 body shell 1 wall on one side.Between the axis part of elastic diaphragm 3 and body shell 1 inwall barrier film Returnning spring 4 is housed.

As shown in Figure 2, present embodiment and Fig. 1 embodiment's difference is that folded elastic diaphragm 3 is the corrugated tube shape elastic diaphragm 3 that an end becomes sealing between the relative mouth end of the individual shell of pressure conversion device two 1; The limit dais 15 that resets is arranged in the hydraulic fluid chamber 16.

Claims

1, a kind of pressure liquid pump, by plunger, spring, cam, the pump housing constitutes plunger pump, the pump chamber (10) that it is characterized in that plunger pump is by oil-piping (9) cut-in pressure conversion equipment, this pressure conversion device is by accompanying the corrugated tube shape elastic diaphragm (3) that a plane ripples shape of being made by metal or nonmetal paper tinsel or an end become sealing between the relative mouth end of two individual shells (1), connect two individual shells (1) fastening with sieve silk (8), make by elastic diaphragm (3) and to be separated into pump pressure cavity (7) and hydraulic fluid chamber (16) in the body shell (1), on pump pressure cavity (7) body shell (1) wall on one side, offer oil inlet hole (2) and oil outlet (6), advance, oil outlet (2, reverse stop valve (17 is housed respectively 6), 5), the axis part of elastic diaphragm (3) and reverse stop valve (5,17) between body shell (1) inwall of an end barrier film Returnning spring (4) is housed.

2, according to the described pressure liquid pump of claim 1, it is characterized in that elastic diaphragm (3) is a plane ripples shape, be provided with the barrier film limit dais (15) that resets at hydraulic fluid chamber (16) body shell (16) wall on one side.

3, according to the described pressure liquid pump of claim 1, it is characterized in that elastic diaphragm (3) is the corrugated tube shape that an end becomes sealing, the limit dais that resets is arranged in the hydraulic fluid chamber (16).