CN220151544U - Adjustable pressure relief structure of electronic oil pump - Google Patents

Abstract

The utility model relates to an adjustable pressure relief structure of an electronic oil pump, which comprises: the safety valve is characterized by comprising a safety valve and a bypass valve which are sequentially arranged: the valve comprises a copper sleeve serving as a valve seat, a steel ball serving as a valve clack, an adjusting spring serving as pressure pre-tightening and a pressure adjusting screw plug serving as pressure adjustment; the bypass valve comprises the following components in sequence: the valve core is cylindrical with a hole in the middle, and an O-shaped ring is arranged on the outer circular surface of the cylindrical valve core. The utility model aims to solve the problems of unstable flow, difficult evacuation and corrosion of a control system of an electronic oil pump, and a bypass valve assembly and a safety valve assembly are arranged in an oil pump housing assembly, so that the operation safety and reliability of the electronic oil pump are improved.

Description

Adjustable pressure relief structure of electronic oil pump

Technical Field

The utility model relates to an electronic oil pump adjustable pressure relief structure, which is an accessory structure of an EGR system for an automobile engine and is a structure of an EGR valve.

Background

The common electronic oil pump comprises a brushless motor component and an oil pump shell component, wherein the oil pump shell component mainly comprises a pump body, a driving gear, a driven gear, a bypass valve component and a safety valve component, and the driving gear is directly driven by a motor through a motor output shaft.

Although the electronic oil pump is mature and applied to a lubricating system or a cooling system of an automobile, in the practical application process, an oil circuit of the electronic oil pump is easy to be blocked, and the working reliability of the electronic oil pump is affected. Particularly, when an oil outlet oil way of the electronic oil pump is blocked, the damage of the oil way or a pump head structure is easy to cause, and the motor can be in a high-load even locked-rotor state for a long time, so that the motor is burnt finally. In addition, the insufficient flow of the electronic oil pump can cause the pressure of the whole lubrication system to be low, the oil supply to be unstable, and the pressure pulsation of the lubrication system can also be caused. For these reasons, the friction pairs of the engine running at high speed cannot be well lubricated, so that the engine burns tiles and is locked, and finally, the engine cannot work normally.

The most common instability of an electronic oil pump mainly shows that the flow suddenly decreases, the phenomenon is often caused by the fact that the valve core of the safety valve deviates and does not reset, the safety valve of the electronic oil pump is mainly characterized in that the conical surface is sealed by the conical surface, so that the processing difficulty of the conical surface parts of the valve body and the valve core is large, the difficulty of the consistency of the conical surface part and the conical surface part is large, the parallelism requirement on two end faces of a spring is high, the contact surface of the valve body and the valve core is poor in neutrality, the contact surface of the valve body and the valve core sometimes has the matching of ellipse and circle, the sealing performance is poor, the leakage phenomenon is caused when part of the engine oil pump safety valve works, and even the quality defects such as unstable opening pressure occur. How to avoid these malfunctions of the electronic oil pump is a problem to be solved.

Disclosure of Invention

In order to overcome the problems in the prior art, the utility model provides an adjustable pressure relief structure of an electronic oil pump. The structure is characterized in that a bypass valve assembly, a safety valve assembly and a brushless motor assembly are additionally arranged on the oil pump housing assembly, so that the operation safety and reliability of the electronic oil pump are improved.

The purpose of the utility model is realized in the following way: an adjustable pressure relief structure of an electronic oil pump, comprising: the motor and electronic equipment storehouse, the pump case of being connected with motor and electronic storehouse, the pump case on be equipped with relief valve and the bypass valve of being connected with the pump chamber through the pipeline, the relief valve including setting gradually: the valve comprises a copper sleeve serving as a valve seat, a steel ball serving as a valve clack, an adjusting spring serving as pressure pre-tightening and a pressure adjusting screw plug serving as pressure adjustment; the bypass valve comprises the following components in sequence: the valve core is cylindrical with a hole in the middle, and an O-shaped ring is arranged on the outer circular surface of the cylindrical valve core.

Furthermore, the bottoms of the motor and the electronic bin are provided with waterproof and ventilation valves.

The utility model has the advantages and beneficial effects that: the utility model aims to solve the problems of unstable flow, difficult evacuation and corrosion of a control system of an electronic oil pump, and a bypass valve assembly and a safety valve assembly are arranged in an oil pump housing assembly, so that the operation safety and reliability of the electronic oil pump are improved.

Drawings

The utility model is further described below with reference to the drawings and examples.

FIG. 1 is a schematic view of a structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a structure according to an embodiment of the present utility model, which is a cross-sectional view taken along A-A in FIG. 1;

FIG. 3 is a schematic view of a structure according to an embodiment of the present utility model, which is an enlarged view of a point B in FIG. 1;

fig. 4 is a schematic diagram of an oil circuit of the electronic oil valve according to an embodiment of the present utility model.

Detailed Description

Embodiment one:

the embodiment is an adjustable pressure relief structure of an electronic oil pump, as shown in fig. 1, 2 and 3. The embodiment comprises the following steps: the motor and electronic equipment storehouse 1, the pump case 2 of being connected with motor and electronic storehouse, the pump case on be equipped with relief valve 3 and bypass valve 4 (see fig. 1, 2) that are connected with the pump chamber through the pipeline the relief valve include setting gradually: a copper sleeve 301 serving as a valve seat, a steel ball 302 serving as a valve clack, an adjusting spring 303 serving as pressure pre-tightening and a pressure adjusting plug screw 304 serving as pressure adjustment; the bypass valve comprises the following components in sequence: the valve comprises a pressure release spring 401 used for setting pressure release, a plastic valve 402 used as a valve clack, a valve core 403 used as a valve seat and a plug 404 used as a seal, wherein the valve core is in a cylindrical shape with a hole 4031 in the middle, and an O-shaped ring 4032 is arranged on the outer circular surface of the cylindrical shape (see figure 3).

The electronic oil pump in this embodiment has a pressure relief and exhaust structure, and the oil path principle is shown in fig. 4. The electronic pump mainly comprises three parts: a pump cartridge assembly, a relief valve, and a bypass valve. Wherein the pump core assembly comprises: the motor comprises a gear chamber in a pump shell, a driving gear, a driven gear and a brushless motor for driving the driving gear, wherein the driving gear and the driven gear are arranged in the gear chamber. The brushless motor output shaft directly drives the driving gear, and the driving gear drives the driven gear to rotate, so that the pressure of driving liquid is formed. The gear chamber is filled with air when the pump core component is not filled with engine oil, and the air in the gear chamber is discharged through the bypass valve through rotation of the gear, so that negative pressure is generated in the gear chamber, and engine oil enters the gear chamber. The engine oil filled between the gear tooth grooves is rotated through the two gears, the engine oil filled between the gear tooth grooves is pumped out from the oil inlet cavity to the oil outlet cavity along the wall of the gear cavity, a low-pressure space is generated on one side of the oil inlet cavity due to the fact that the gears are disengaged and the engine oil is continuously carried out, the engine oil of the oil pan enters the oil cavity through the strainer under the action of atmospheric pressure, and the engine oil is pumped out through the oil outlet under the extrusion action generated by the fact that the gears enter the gears and the engine oil is continuously carried in on one side of the oil outlet cavity, and the outlet flow and the pressure of the engine oil are controlled through the rotating speed of the brushless motor.

The safety valve arranged in the pump shell is mainly used for pressure relief in the gear cavity, and when the internal pressure is too high, the oil duct can form internal self-circulation, so that the purpose of pressure relief is achieved.

The safety valve comprises a screw plug, a spring, a steel ball and a copper sleeve; one side of the pump body is provided with a stepped hole, and as shown in fig. 3, the stepped hole is sequentially provided with a threaded hole, a valve hole and a copper sleeve hole from outside to inside. The copper sleeve is pressed in the copper sleeve hole, the steel ball and the spring are installed in the valve hole, the screw plug is installed in the threaded hole, the spring is supported and positioned through the screw plug, is positioned in the middle of the steel ball screw plug and provides pre-tightening pressure, and is in R-angle contact with the copper sleeve through the steel ball. Copper is adopted as copper sleeve material, the copper sleeve material is combined with soft and hard to form a seal, and the opening pressure of a safety valve of the safety valve can be adjusted through a screw plug.

The bypass valve is mainly used for emptying the oil pump in the initial starting stage, so that negative pressure is generated, and engine oil can smoothly enter the gear cavity. The bypass valve includes: screw plug, valve core, plastic valve and spring. The center of the valve core is provided with a through hole, the outer circular surface is provided with an O-shaped sealing ring, and the valve core is pressed into the valve hole to be fixed. The plastic valve is a valve clack which can move up and down, and the pretightening force is set through a pressure release spring. The plastic valve is combined with the valve core under the action of the pressure release spring, when the air needs to be exhausted, air forms pressure on the plastic valve from a hole in the middle of the valve core, and the plastic valve is pushed to move, so that the valve is opened. The plastic valve can be made of oil-resistant rubber material. When the oil pump works, the channel is closed, and when the oil pump works initially, air can be discharged through the channel when the exhaust pressure is larger than the pre-tightening force of the spring. When the oil fills the gear chamber, the exhaust passage is closed.

In order to reduce the influence of heat generation of electric elements in the motor and the electronic equipment bin, a waterproof ventilation valve can be additionally arranged on the motor and the electronic equipment bin.

Embodiment two:

this embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment with respect to the motor and the electronic equipment magazine. The motor and the bottom of the electronic bin are provided with waterproof ventilation valves.

The waterproof and breathable valve is a valve capable of allowing air to pass through but preventing water from entering.

Finally, it should be noted that the above is only intended to illustrate the technical solution of the present utility model and not to limit it, and although the utility model has been described in detail with reference to the preferred arrangement, it will be understood by those skilled in the art that modifications and equivalent substitutions can be made to the technical solution of the present utility model (such as the structural form of the oil valve, the application of the materials and the pressure form, etc.), without departing from the spirit and scope of the technical solution of the present utility model.

Claims (2)

1. An adjustable pressure relief structure of an electronic oil pump, comprising: the safety valve is characterized by comprising a safety valve and a bypass valve which are sequentially arranged: the valve comprises a copper sleeve serving as a valve seat, a steel ball serving as a valve clack, an adjusting spring serving as pressure pre-tightening and a pressure adjusting screw plug serving as pressure adjustment; the bypass valve comprises the following components in sequence: the valve core is cylindrical with a hole in the middle, and an O-shaped ring is arranged on the outer circular surface of the cylindrical valve core.

2. The pressure relief structure of claim 1, wherein the motor and the electronics compartment bottom are provided with a waterproof vent valve.