CN205078389U - High abrasion type high pressure common rail fuel oil metering valve - Google Patents

Abstract

The utility model is a highly wear-resistant high-pressure common rail fuel metering valve. The metering valve includes an electromagnet body (1), an armature part (2) and a mechanical slide valve (3). The electromagnet body (1) 1. The central axes of the armature part (2) and the mechanical slide valve (3) coincide; the armature part (2) includes an armature body (4) and an armature sleeve (5) fitted on the armature body (4); The central axis of the armature body (4) and the armature sleeve (5) coincides with the central axis of the electromagnet body (1) and the armature component (2). The utility model relates to a high-wear-resistant high-pressure common-rail fuel metering valve, which helps to increase the service life and reduce the manufacturing cost.

Description

High wear-resistant high pressure common rail fuel metering valve

technical field

The utility model relates to a metering valve, in particular to a metering valve used in an oil inlet system of an engine electronically controlled high-pressure common rail oil pump, and belongs to the technical field of an engine electronically controlled common rail system.

Background technique

At present, with the implementation of emission regulations and people's higher and higher requirements for vehicle power, diesel engines and other fuel systems that need to use high injection pressure can be competent; high-pressure common rail system is currently the first choice;

The fuel metering valve is installed on the oil pump of the electronically controlled high-pressure common rail system such as diesel engines. The amount of oil entering the plunger cavity can precisely control the fuel pressure of the high-pressure common rail system;

Nowadays, fuel metering valves for electronically controlled high-pressure common rail oil pumps are mainly produced by companies such as BOSCH in Germany, SIEMENS in Germany, DELPHI in the United States, and DENSO in Japan. Conventional fuel metering valves are only suitable for diesel oil due to their relatively large action strokes and high action frequency. Lubrication does not achieve a good lubrication effect, so bad phenomena such as jamming and wear of mechanical moving parts often occur, seriously affecting its service life, and eventually causing problems in the oil inlet system of the entire high-pressure common rail; for this reason, it is necessary to improve the armature The hardness of the parts, but due to its large size, processing is not convenient enough; and the overall improvement of the hardness of the armature parts will undoubtedly greatly increase the cost of the metering valve.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned disadvantages and provide a high wear-resistant high-pressure common rail fuel metering valve which helps to improve the service life and reduce the manufacturing cost.

The purpose of this utility model is achieved in that:

A high-wear-resistant high-pressure common rail fuel metering valve, the metering valve includes an electromagnet body, an armature part and a mechanical slide valve, and the central axes of the electromagnet body, the armature part and the mechanical slide valve coincide;

The armature component includes an armature body and an armature sleeve fitted on the armature body; the central axes of the armature body and the armature sleeve coincide with the central axes of the electromagnet body and the armature component.

The utility model relates to a high wear-resistant high-pressure common rail fuel metering valve. A sliding bearing is arranged in the electromagnet body, and an armature sleeve of the armature part is set in the sliding bearing.

The utility model relates to a highly wear-resistant high-pressure common rail fuel metering valve. The material of the armature body is bearing steel.

The utility model is a high-wear-resistant high-pressure common rail fuel metering valve. The Rockwell hardness of the bearing steel constituting the armature body is greater than HRC60 after heat treatment;

The utility model relates to a highly wear-resistant high-pressure common rail fuel metering valve. A step is arranged at the end of the armature body, and the armature sleeve is set on the step.

The utility model relates to a high-wear-resistant high-pressure common-rail fuel metering valve. The armature body and the armature sleeve adopt an interference fit.

The utility model relates to a high wear-resistant high-pressure common rail fuel metering valve. The interference between the armature body and the armature sleeve is 0.02mm.

The utility model relates to a highly wear-resistant high-pressure common rail fuel metering valve. The sliding bearing and the armature sleeve adopt gap fit.

The utility model relates to a highly wear-resistant high-pressure common rail fuel metering valve. The gap between the sliding bearing and the armature sleeve is 0.025mm.

The utility model relates to a highly wear-resistant high-pressure common rail fuel metering valve. The inner ring surface of the sliding bearing is coated with a friction-reducing material coating.

Compared with the prior art, the beneficial effects of the utility model are:

The armature part of the utility model adopts the combined structure of the armature body and the armature sleeve, so it can effectively improve its wear resistance and reduce the manufacturing cost by only increasing the hardness of the high armature sleeve at the friction part; at the same time, by setting anti-friction materials Coating can reduce friction, reduce wear, and further improve its service life; and in the split combined armature parts, it is convenient to carry out precision machining and heat treatment on the armature sleeve, which can effectively improve its wear resistance, thereby prolonging the service life of the fuel metering valve. life.

Description of drawings

Fig. 1 is a structural schematic diagram of a high wear-resistant high-pressure common rail fuel metering valve of the present invention.

Fig. 2 is a structural schematic diagram of an armature part of a high-wear-resistant high-pressure common rail fuel metering valve of the present invention.

Fig. 3 is a structural schematic diagram of an armature body of a high wear-resistant high-pressure common rail fuel metering valve of the present invention.

Fig. 4 is a structural schematic diagram of an armature sleeve of a high wear-resistant high-pressure common rail fuel metering valve of the present invention.

in:

Electromagnet body 1, armature part 2, mechanical slide valve 3, armature body 4, armature sleeve 5, sliding bearing 6.

detailed description

Referring to Figures 1 to 4, the utility model relates to a high wear-resistant high-pressure common rail fuel metering valve. The metering valve includes an electromagnet body 1, an armature part 2 and a mechanical slide valve 3. The electromagnet body 1 , the central axis of the armature part 2 and the mechanical slide valve 3 coincide; the armature part 2 includes an armature body 4 and an armature sleeve 5 which is sleeved on the armature body 4; the central axis of the armature body 4 and the armature sleeve 5 and The central axes of the electromagnet body 1 and the armature part 2 coincide;

Specifically, the electromagnet body 1 is provided with a sliding bearing 6, and the armature sleeve 5 of the armature part 2 is set in the sliding bearing 6;

Through the combined design of the armature body 4 and the armature sleeve 5, the armature sleeve 5 which rubs against the sliding bearing 6 can be conveniently made of hard materials, while the armature body 4 is made of conventional materials, thereby improving its wear resistance and prolonging its service life At the same time, the manufacturing cost is reduced;

Preferably, the material of the armature body 4 is bearing steel, and the Rockwell hardness of the bearing steel is greater than HRC60 after heat treatment;

Preferably, a step is provided at the end of the armature body 4, and the armature sleeve 5 is fitted on the step; further, an interference fit is adopted between the armature body 4 and the armature sleeve 5, and the interference fit is 0.02mm ; thus improving its connection strength;

Preferably, a clearance fit is adopted between the sliding bearing 6 and the armature sleeve 5, and the clearance is 0.025 mm; further, the inner ring surface of the sliding bearing 6 is coated with a coating of antifriction material, thereby further reducing its Friction, reduce wear and increase its service life;

In addition: it should be noted that the above specific implementation is only an optimization solution of this patent, and any changes or improvements made by those skilled in the art based on the above ideas are within the scope of protection of this patent.

Claims (10)

1. A high wear-resistant high-pressure common rail fuel metering valve, the metering valve includes an electromagnet body (1), an armature part (2) and a mechanical slide valve (3), the electromagnet body (1), The central axes of the armature part (2) and the mechanical slide valve (3) coincide; it is characterized in that: The armature part (2) includes an armature body (4) and an armature sleeve (5) sleeved on the armature body (4); the central axis of the armature body (4) and the armature sleeve (5) and the electromagnet body (1) The central axes of the armature parts (2) are coincident. 2. A high wear-resistant high-pressure common rail fuel metering valve as claimed in claim 1, characterized in that: a sliding bearing (6) is arranged inside the electromagnet body (1), and the armature part (2) The armature sleeve (5) is sleeved in the sliding bearing (6). 3. A high wear-resistant high-pressure common rail fuel metering valve according to claim 1, characterized in that: the armature body (4) is made of bearing steel. 4. A high wear-resistant high-pressure common rail fuel metering valve according to claim 3, characterized in that the Rockwell hardness of the bearing steel constituting the armature body (4) is greater than HRC60 after heat treatment. 5. A high wear-resistant high-pressure common rail fuel metering valve according to claim 1, characterized in that: the end of the armature body (4) is provided with a step, and the armature sleeve (5) is set on the step . 6. A high-wear-resistant high-pressure common rail fuel metering valve according to claim 1 or 5, characterized in that an interference fit is adopted between the armature body (4) and the armature sleeve (5). 7. A high-wear-resistant high-pressure common rail fuel metering valve according to claim 6, characterized in that: the interference between the armature body (4) and the armature sleeve (5) is 0.02mm. 8. A high-wear-resistant high-pressure common rail fuel metering valve according to claim 2, characterized in that clearance fit is adopted between the sliding bearing (6) and the armature sleeve (5). 9. A high wear-resistant high-pressure common rail fuel metering valve according to claim 8, characterized in that: the gap between the sliding bearing (6) and the armature sleeve (5) is 0.025 mm. 10. A high-wear-resistant high-pressure common rail fuel metering valve according to claim 2, characterized in that: the inner ring surface of the sliding bearing (6) is coated with a friction-reducing material coating.