Electric control booster pump
阅读说明:本技术 一种电控增压泵 (Electric control booster pump ) 是由 杨晓丽 王庆利 包涛 梁小波 刘悦 易小龙 商荣凯 余俊宏 于 2020-05-29 设计创作,主要内容包括:本方案涉及一种电控增压泵,以提高增压泵的增压效果。其包括:增压泵体;增压柱塞,增压柱塞和增压泵体之间形成控制腔和增压腔;进油阀组件;增压柱塞内形成有供穿过进油阀组件的燃油流入到增压腔内的油道,增压泵体上设置有充油油道和泄油油道;增压泵体上设置有使高压燃油从增压腔流出的燃油出口;电控阀组件,其可实现阻断燃油泄流时使燃油通过充油油道流入到控制腔内或阻断充油油道使控制腔内的燃油通过泄油油道流出;增压时,电控阀组件通电,导通泄油油道和控制腔;控制腔内的燃油通过泄油油道流出,增压柱塞下行,进入增压腔内的高压燃油在增压柱塞的挤压下实现增压。(This scheme relates to an automatically controlled booster pump to improve the pressure boost effect of booster pump. It includes: a booster pump body; a control cavity and a pressurization cavity are formed between the pressurization plunger and the pressurization pump body; an oil inlet valve assembly; an oil duct for allowing fuel oil passing through the oil inlet valve assembly to flow into the pressurizing cavity is formed in the pressurizing plunger, and an oil charging oil duct and an oil discharging oil duct are arranged on the pressurizing pump body; a fuel outlet which enables high-pressure fuel to flow out of the pressurizing cavity is formed in the pressurizing pump body; the electronic control valve assembly can block the fuel oil from flowing into the control cavity through the oil charging oil passage or block the oil charging oil passage to enable the fuel oil in the control cavity to flow out through the oil discharging oil passage when the fuel oil is blocked; when the pressure is increased, the electric control valve component is electrified to conduct the oil drainage channel and the control cavity; the fuel in the control cavity flows out through the oil drainage oil duct, the pressurizing plunger moves downwards, and the high-pressure fuel entering the pressurizing cavity is pressurized under the extrusion of the pressurizing plunger.)
1. An electrically controlled booster pump, comprising:
a booster pump body (1);
the booster pump comprises a booster plunger (2) movably arranged in an inner hole of a booster pump body (1), wherein a control cavity (101) and a booster cavity (102) are formed between the booster plunger (2) and the booster pump body (1);
the oil inlet valve assembly is installed in an inner hole of the pressurizing plunger (2);
an oil duct (201) which penetrates through the oil inlet valve assembly and enables fuel oil to flow into the pressurizing cavity (102) is arranged in the pressurizing plunger (2), and an oil charging oil duct (103) which enables the fuel oil to flow into the control cavity (101) and an oil discharging oil duct (104) which enables the fuel oil in the control cavity (101) to flow out are arranged on the pressurizing pump body (1); the booster pump body (1) is provided with a fuel outlet (105) which enables the high-pressure fuel after being boosted to flow out of the booster cavity (102);
the electronic control valve assembly is arranged on one side of the supercharging pump body (1), and the electronic control valve assembly realizes that fuel oil flows into the control cavity (101) through the oil-filled oil duct (103) or fuel oil in the control cavity (101) flows out through the oil-drained oil duct (104) by switching on or off a passage between the control cavity (101) and the oil-filled oil duct (103) and the oil-drained oil duct (104);
before pressurization, the electric control valve assembly is not electrified, the oil filling oil duct (103) and the control cavity (101) are communicated, and the oil drainage oil duct (104) is blocked from being communicated with the control cavity (101); fuel oil enters the control cavity (101) through the oil filling oil duct (104), and high-pressure fuel oil enters the pressurizing cavity (102) through the internal oil duct (301) of the oil inlet valve assembly and the oil duct (201) of the pressurizing plunger;
when the pressure is increased, the electric control valve assembly is electrified, the oil drainage oil passage (104) and the control cavity (101) are communicated, and the communication between the oil filling oil passage (103) and the control cavity (101) is blocked; the fuel in the control cavity (101) flows out through the oil drainage channel (104), meanwhile, the boosting plunger (2) moves towards one side of the boosting cavity (102), and the high-pressure fuel entering the boosting cavity (101) is boosted under the extrusion of the boosting plunger (2);
after pressurization, the pressurized high-pressure fuel in the pressurization cavity (102) flows out through a fuel outlet of the pressurization pump body (1).
2. The electric control booster pump according to claim 1, wherein the inner hole of the booster pump body (1) is a three-stage stepped hole arranged along the direction of the central axis thereof, and the outer wall of the booster plunger (2) is provided with the booster plunger (2) in a stepped manner;
the control cavity (101) is formed between the first-stage step of the outer wall of the booster plunger (2) and the first-stage inner hole of the booster pump body (1), the booster cavity (102) is formed between the second-stage step of the outer wall of the booster plunger (2) and the second-stage inner hole of the booster pump body (1), and the fuel outlet is formed in the third-stage inner hole of the booster pump body (1);
the electric control booster pump further comprises:
a plunger spring (7) mounted within the pumping chamber (102), the plunger spring (7) being compressible or resettable with movement of the pumping plunger (2).
3. The electrically-controlled booster pump according to claim 1, wherein a two-stage stepped hole is provided in the booster plunger (2) in an axial direction thereof, and the oil feed valve assembly includes: the conical valve seat (31) is fixedly arranged in a first-stage stepped hole in the pressurizing plunger (2), and an oil inlet channel for fuel oil to enter is arranged in the conical valve seat (31); the conical valve core (32) can move in the first-stage stepped hole of the pressurizing plunger (2) and the oil inlet channel of the conical valve seat (31), and a conical surface seal or a conical oil channel for fuel oil to pass through is formed between the conical valve core (32) and the oil inlet channel of the conical valve seat (31); and the cone valve spring (33) is arranged between the first-stage stepped hole of the pressurizing plunger (2) and the cone valve core (32), and the cone valve spring (33) can be compressed or reset along with the movement of the cone valve core (32).
4. The electrically controlled booster pump of claim 1, wherein the electrically controlled valve assembly comprises:
a valve body (41) fixed to one side of the booster pump body (1);
a solenoid valve coil (42) mounted on the valve body (41);
the inner valve core (43) is arranged in an accommodating cavity (401) formed between the inner hole of the valve body (41) and the booster pump body (1);
an outer valve core (44) movably sleeved on the inner valve core (43), wherein a first inlet hole (441) capable of being communicated with the oil-filled oil duct (103) and a second inlet hole (442) capable of being communicated with the control cavity (101) are formed in the outer valve core (44);
an armature (45) fixedly sleeved on the outer valve core (43);
the electromagnetic valve spring (46) is sleeved on the inner valve core (43) and arranged between the end part of the inner valve core (43) and the armature iron (45);
when the electromagnetic valve coil (42) is not electrified, the outer valve core (44) keeps an initial state, a cavity (402) for communicating the first inlet hole (441) and the second inlet hole (442) is formed between the inner valve core (43) and the outer valve core (44), and fuel enters the control cavity (101) through the oil-filled oil channel (103), the first inlet hole (441), the cavity (402) and the second inlet hole (442);
when the electromagnetic valve coil (42) is electrified, the armature (45) drives the outer valve core (44) to move and compress the electromagnetic valve spring (46), the cavity (402) is not formed between the outer valve core (44) and the inner valve core (43), and the control cavity (101) is communicated with the oil drainage oil duct (104);
after the electromagnetic valve coil (42) is powered off, the outer valve core (44) is reset under the force of the electromagnetic valve spring (46), and the cavity (402) is formed between the outer valve core and the inner valve core (43).
5. The electric control booster pump according to claim 4, characterized in that the inner valve core (43) is provided with a drain hole (431) communicated with the accommodating chamber (401), and the valve body (41) is provided with a fuel drain port (411) communicated with the drain hole (431).
6. The electric control booster pump according to claim 1, characterized in that an oil inlet joint (5) is installed on one side of the booster pump body (1), an oil inlet joint gland (6) fastens the oil inlet joint (5) on the booster pump body (1) in a threaded connection mode, and an oil inlet channel (501) communicated with an internal oil passage (301) of the oil inlet valve assembly is arranged on the oil inlet joint (5).
Technical Field
The invention belongs to the field of booster pumps for ships, and particularly relates to an electric control booster pump.
Background
For a booster pump for a ship, in the prior art, fuel oil pressurization is usually realized by adopting an electric control booster pump, that is, a boosting cavity of fuel oil in the booster pump is driven to be pressurized when an electromagnetic valve is electrified. Specifically, as shown in fig. 1, the publication numbers are: CN110397533A discloses an electrically controlled booster pump, in which high-pressure fuel enters an oil inlet chamber through an
Disclosure of Invention
The invention provides an electric control booster pump, which is used for improving the boosting effect of the booster pump.
The technical scheme of the invention is as follows:
the invention provides an electric control booster pump, comprising:
a booster pump body;
the pressurizing plunger is movably arranged in an inner hole of the pressurizing pump body, and a control cavity and a pressurizing cavity are formed between the pressurizing plunger and the pressurizing pump body;
the oil inlet valve assembly is installed in the inner hole of the pressurizing plunger;
an oil duct through which the fuel oil passing through the oil inlet valve assembly flows into the pressurizing cavity is formed in the pressurizing plunger, and an oil filling oil duct through which the fuel oil flows into the control cavity and an oil drainage oil duct through which the fuel oil in the control cavity flows out are formed in the pressurizing pump body; the supercharging pump body is provided with a fuel outlet which enables the supercharged high-pressure fuel to flow out of the supercharging cavity;
the electronic control valve assembly is arranged on one side of the supercharging pump body, and realizes that fuel oil is supplied to flow into the control cavity through the oil charging oil duct or the fuel oil in the control cavity flows out through the oil discharging oil duct by switching on or switching off a passage between the control cavity and the oil charging oil duct and the oil discharging oil duct;
before pressurization, the electric control valve component is not electrified, the oil-filled oil duct and the control cavity are conducted, and the oil-draining oil duct is blocked from being communicated with the control cavity; the fuel oil enters the control cavity through the oil filling oil duct, and the high-pressure fuel oil enters the pressurizing cavity through the internal oil duct of the oil inlet valve assembly and the oil duct of the pressurizing plunger;
when the pressure is increased, the electric control valve component is electrified, the oil drainage oil duct and the control cavity are communicated, and the oil filling oil duct is blocked from being communicated with the control cavity; the fuel in the control cavity flows out through the oil drainage duct, meanwhile, the pressurizing plunger moves towards one side of the pressurizing cavity, and the high-pressure fuel entering the pressurizing cavity is pressurized under the extrusion of the pressurizing plunger;
after pressurization, the pressurized high-pressure fuel oil in the pressurization cavity flows out through a fuel oil outlet of the pressurization pump body.
Preferably, the inner hole of the pressurizing pump body is a three-stage stepped hole arranged along the central axis direction of the pressurizing pump body, and the outer wall of the pressurizing plunger is arranged in a stepped manner;
the control cavity is formed between the first-stage step of the outer wall of the booster plunger and the first-stage inner hole of the booster pump body, the booster cavity is formed between the second-stage step of the outer wall of the booster plunger and the second-stage inner hole of the booster pump body, and the fuel outlet is formed in the third-stage inner hole of the booster pump body;
the electric control booster pump further comprises:
and the plunger spring is arranged in the pressurizing cavity and can be compressed or reset along with the movement of the pressurizing plunger.
Preferably, a two-step stepped hole is formed in the pressurizing plunger in the axial direction thereof, and the oil feed valve assembly includes: the conical valve seat is fixedly arranged in a first-stage stepped hole in the pressurizing plunger, and an oil inlet channel for fuel oil to enter is arranged in the conical valve seat; the conical valve core can move in the first-stage stepped hole of the pressurizing plunger and the oil inlet channel of the conical valve seat, and a conical surface seal or a conical oil channel for fuel oil to pass through is formed between the conical valve core and the oil inlet channel of the conical valve seat; and the cone valve spring is arranged between the first-stage stepped hole of the pressurizing plunger and the cone valve core and can be compressed or reset along with the movement of the cone valve core.
Preferably, the electrically controlled valve assembly comprises:
the valve body is fixed on one side of the booster pump body;
a solenoid valve coil mounted on the valve body;
the inner valve core is arranged in an accommodating cavity formed between the inner hole of the valve body and the booster pump body;
the outer valve core is movably sleeved on the inner valve core, and a first inlet hole which can be communicated with the oil-filled oil duct and a second inlet hole which can be communicated with the control cavity are formed in the outer valve core;
the armature is fixedly sleeved on the outer valve core;
the electromagnetic valve spring is sleeved on the inner valve core and arranged between the end part of the inner valve core and the armature;
when the electromagnetic valve coil is not electrified, the outer valve core keeps an initial state, a cavity for communicating the first inlet hole and the second inlet hole is formed between the inner valve core and the outer valve core, and fuel enters the control cavity through the oil-filled oil passage, the first inlet hole, the cavity and the second inlet hole;
when the electromagnetic valve coil is electrified, the armature drives the outer valve core to move and compress the electromagnetic valve spring, the cavity is not formed between the outer valve core and the inner valve core any longer, and the control cavity is communicated with the oil drainage oil duct;
after the electromagnetic valve coil is powered off, the outer valve core is reset under the force of the electromagnetic valve spring, and the cavity is formed between the outer valve core and the inner valve core.
Preferably, an oil drainage hole communicated with the accommodating cavity is formed in the inner valve core, and a fuel oil drainage port communicated with the oil drainage hole is formed in the valve body.
Preferably, the oil inlet joint is arranged on one side of the booster pump body, the oil inlet joint gland is fastened on the booster pump body in a threaded connection mode, and a fuel oil inlet channel communicated with an internal oil channel of the oil inlet valve assembly is arranged on the oil inlet joint.
The invention has the beneficial effects that: in the pressurizing process, when the fuel entering the control cavity in the oil charging stage is discharged through the oil discharge passage, the pressurizing plunger moves towards one side of the pressurizing cavity synchronously to extrude the pressurizing cavity, the high-pressure fuel in the pressurizing cavity is further pressurized, and after the fuel entering the control cavity in the oil charging stage is communicated with the oil tank, the control cavity is not filled with the high-pressure fuel blocking the pressurizing plunger to move continuously, so that the pressurizing plunger can move quickly in place, and the pressurizing effect of the pressurizing pump is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art electrically controlled booster pump;
FIG. 2 is a schematic diagram of an electrically controlled booster pump according to the present invention;
FIG. 3 is a schematic view of a structure of a booster pump body for achieving fuel oil charging and discharging;
fig. 4 is a schematic diagram of the result of the cooperation of the booster pump body and the electronically controlled valve assembly.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides an electric control booster pump which meets the requirements of a high-pressure fuel system with the rated rotating speed of a diesel engine of 1000-2000 r/min, the injection pressure of 90-150 MPa and the flow of 0.5 ml/cyl.
As shown in fig. 2 to 4, the electrically-controlled booster pump specifically includes: a
When oil is filled, high-pressure fuel oil is divided into two paths before entering the
When pressurization is needed, the electric control valve assembly is powered on, internal devices of the electric control valve assembly change in state or position, fuel is blocked from flowing into the
Meanwhile, the improvement of the present embodiment has a technical effect that the service life of the pressurizing plunger 2 can be prolonged, which is not existed in the prior art. The technical effect is caused because in the prior art, because the throttling hole is punched on the booster plunger, the booster plunger is always in a radial stress unbalanced state under the action of high-pressure fuel oil; because the coupling working surfaces of the booster plunger and the booster pump body belong to precise coupling, the unbalanced radial stress of the booster plunger can cause the coaxiality of the booster plunger and the booster pump body to be poor, the abrasion of the contact surfaces of the working sections of the booster plunger and the booster pump body can be accelerated, and the service life of the booster plunger is greatly shortened; meanwhile, in the prior art, the fuel entering the pressurizing plunger cavity and the pressurizing cavity is realized by respectively arranging one oil duct on the plunger, namely, the high-pressure fuel entering from the oil inlet joint is divided into two parts at the inlet of the pressurizing plunger, and the flow of the fuel entering the pressurizing plunger cavity through the throttling hole is far smaller than the flow of the fuel flowing into the plunger cavity through the one-way valve; in the prior art, after the one-way valve is closed, all high-pressure fuel entering the oil inlet joint flows into a pressurizing plunger cavity through the throttle hole, so that the problem of unbalanced radial stress of the pressurizing plunger is further solved, the abrasion between the pressurizing plunger and a pressurizing pump body is further increased, and the service life of the pressurizing plunger is further shortened. In the present embodiment, since the high-pressure fuel flows into the
Meanwhile, the improvement of the embodiment can also reduce the effect of high-pressure fuel in the supercharging process. The reason is that in the scheme in the prior art, in the pressurization process, although high-pressure fuel oil can not enter the pressurization cavity through the check valve, the high-pressure fuel oil which continuously enters all enters the pressurization plunger cavity through the throttle hole, and the high-pressure fuel oil in the pressurization plunger cavity can be continuously discharged to the outside in a pressure relief manner to the oil return tank because the electromagnetic valve is in the power-on state. For the booster pump, the fuel oil entering the oil inlet joint of the booster pump needs to be boosted to a certain extent, and in the prior art, the boosted fuel oil is completely wasted in the boosting stage, so that great energy loss is caused. That is, the prior art has the problem that oil is not completely filled and oil is not drained and is not crisp. The opening and closing of the oil drainage oil way are not realized by direct driving of the electromagnetic valve, the oil drainage oil way has the action factor depending on the self gravity of the sealing block, the working environment of the sealing block is not simple (high-pressure and low-pressure fuel oil is mixed), and the reliability of the system can be reduced by the design. In the embodiment, in the pressurization process, the oil inlet valve assembly blocks high-pressure fuel oil from entering the
In addition, in the scheme of the prior art, the pressurizing plunger is stressed by a large amount and is complex, and the requirement on the strength of the used material is extremely high. The new design scheme transfers partial stress to the pressurizing
Of course, in this embodiment, in order to realize the entry of the high-pressure fuel, as shown in fig. 2, the electrically-controlled boost pump further includes: install the
In order to achieve the above technical effects, in the present embodiment, specific technical means for achieving the technical effects are provided.
As shown in fig. 2 to 4, preferably, the inner hole of the pressurizing
Specifically, in the electric control booster pump in this embodiment, when oil is filled, high-pressure fuel enters through the fuel inlet channel 501 of the fuel inlet joint 5, and then reaches the cavity formed among the booster plunger 2, the fuel inlet joint 5, and the
Meanwhile, for the oil inlet valve assembly in the embodiment of the invention, the conical surface sealing mode formed by the
As shown in fig. 2 and 4, the electrically controlled valve assembly includes: a valve body 41 fixed to one side of the booster pump body 1; a solenoid coil 42 mounted on the valve body 41; an inner valve core 43 installed in an accommodating cavity 401 formed between the inner hole of the valve body 41 and the booster pump body 1; an outer valve core 44 movably sleeved on the inner valve core 43, wherein a first inlet hole 441 capable of being communicated with the oil-filled oil passage 103 and a second inlet hole 442 capable of being communicated with the control cavity 101 are arranged on the outer valve core 44; an armature 45 fixedly sleeved on the outer valve core 44; an electromagnetic valve spring 46 sleeved on the inner valve core 43 and arranged between the end part of the inner valve core 43 and the armature 45; when the solenoid valve coil 42 is not energized, the outer spool 44 maintains an initial state, a cavity 402 which conducts the first inlet hole 441 and the second inlet hole 442 is formed between the inner spool 43 and the outer spool 44, and fuel enters the control chamber 101 through the oil-filled oil passage 103, the first inlet hole 441, the cavity 402 and the second inlet hole 442; when the electromagnetic valve coil 42 is energized, the armature 45 drives the outer valve core 44 to move and compress the electromagnetic valve spring 46, the cavity 402 is no longer formed between the outer valve core 44 and the inner valve core 43, and the control cavity 101 is communicated with the oil drainage oil duct 104; after the solenoid coil 42 is de-energized, the outer spool 44 is reset under the force of the solenoid spring 46, and the cavity 402 is formed between the outer spool 44 and the inner spool 43.
As shown in fig. 4, in the electronic control valve assembly of the present embodiment, an
When the power is not supplied, the
The electric control booster pump in the embodiment of the invention mainly comprises a
The
The
The booster plunger 2 and the booster pump body 2 are provided with high-pressure oil ducts, the plunger spring 7 is arranged in a second-stage inner hole of the
The electric control valve component comprises an
The oil inlet joint gland 6 fastens the
The electric control booster pump of the invention has the following working stages:
oil filling stage: high-pressure fuel enters the pressurizing
A pressurization stage: the solenoid valve coil is electrified, the
A reset stage: the ultrahigh pressure fuel flows out through the
The gas-electric control booster pump adopts the design, and has the advantages of high booster ratio, compact structure, good reliability, flexible control, quick response and the like. The requirements of high-pressure fuel systems of the diesel engine with the rated rotating speed of 1000-2000 r/min, the injection pressure of 90-150 MPa and the flow of 0.5ml/cyl are met.
The embodiments described above describe only some of the one or more embodiments of the present invention, but those skilled in the art will recognize that the invention can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.
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