CN219587686U

CN219587686U - High-flow common rail oil sprayer control valve

Info

Publication number: CN219587686U
Application number: CN202321023012.7U
Authority: CN
Inventors: 吴勇
Original assignee: NANTONG WIEDSON FUEL INJECTION EQUIPMENT CO Ltd
Current assignee: NANTONG WIEDSON FUEL INJECTION EQUIPMENT CO Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-08-25
Anticipated expiration: 2033-04-27

Abstract

The utility model belongs to the technical field of control valves, in particular to a high-flow common rail fuel injector control valve which comprises a valve body, wherein a first cavity and a second cavity are formed in the valve body, the first cavity is positioned at the top of the second cavity, a moving block is connected in a sliding manner in the first cavity, a fixed column is fixedly connected at the bottom of the moving block, a jack is formed in the fixed column, and a plug rod is inserted into the jack; through the oil inlet oil feed, oil gets into in the second cavity that is located movable plate bottom position along first pipeline, and when the oil pressure increased to certain index, make needle valve bottom break away from the fuel sprayer to make the fuel sprayer open the oil spout, but when the fuel sprayer was opened, the movable plate can just remove to the second pipeline top, makes in the second cavity little oil can get into in the second cavity and the first cavity of movable plate top through the second pipeline, makes the lubricated first cavity inner wall of oil, reduces the friction loss between movable block and the valve body inner wall, makes the valve body gas tightness be difficult to decline.

Description

High-flow common rail oil sprayer control valve

Technical Field

The utility model belongs to the technical field of control valves, and particularly relates to a control valve of a high-flow common rail fuel injector.

Background

The high-flow common rail fuel injector comprises the characteristics of a conventional fuel injector, the common rail fuel injector control valve is one of core components of the high-pressure common rail fuel system, is responsible for optimally controlling fuel injection timing, fuel injection quantity, fuel injection rate and the like according to the requirements of the running working conditions of a diesel engine, and is the component with the highest technical content and the highest technical difficulty in the research and development of the high-pressure common rail fuel injection system.

The existing high-flow common rail oil sprayer control valve mainly adjusts the extrusion force of a spring through a rotating control block, so that oil entering the control valve is increased, the pressure in the valve body can be increased, a moving block at the bottom of a pressure top spring is lifted, and an oil spray nozzle is opened, so that the oil is sprayed out.

At present, a valve body is internally provided with a precise part, when a moving block frequently moves in the valve body due to oil pressure change, the moving block is easy to wear, so that the air tightness in the valve body is reduced, the control performance of a control valve of a high-flow common rail oil injector is affected, and therefore, the control valve of the high-flow common rail oil injector is provided for the problems.

Disclosure of Invention

In order to make up the defects of the prior art and solve the existing problems, the control valve of the high-flow common rail fuel injector is provided.

The technical scheme adopted for solving the technical problems is as follows: the utility model discloses a control valve of a high-flow common rail oil sprayer, which comprises a valve body, wherein a first cavity and a second cavity are formed in the valve body, the first cavity is positioned at the top of the second cavity, a moving block is connected in a sliding manner in the first cavity, a fixed column is fixedly connected to the bottom of the moving block, a jack is formed in the fixed column, a plug rod is inserted in the jack, a moving plate is fixedly connected to the bottom of the plug rod, a spring II is fixedly connected between the moving plate and the fixed column, the spring II is sleeved on the side wall of the plug rod, a needle valve is fixedly connected to the bottom of the moving plate, the moving plate is connected to the inner wall of the second cavity in a sliding manner, an oil nozzle is arranged at one end of the second cavity far away from the first cavity, the oil nozzle penetrates through the valve body, one end of the oil nozzle close to the oil nozzle is inserted in the oil nozzle, an oil inlet and an oil outlet are formed in the side wall of the valve body, the oil inlet is positioned at the top, the oil outlet is communicated with the interior of the first cavity, a first pipeline is formed between the valve body and the second cavity, a needle valve is positioned between the first pipeline and the second pipeline is positioned between the first pipeline and the second cavity, the needle valve is positioned below the second pipeline, and the second pipeline is positioned above the moving plate.

Preferably, the first cavity is slidably connected with an adjusting block, the adjusting block is located at the top of the moving block, and a first spring is clamped between the adjusting block and the moving block.

Preferably, the top of the valve body is clamped with a sealing cover, the bottom of the sealing cover is fixedly connected with a sealing gasket, and the sealing gasket is clamped at the top of the inner wall of the valve body.

Preferably, a groove is formed in one surface, close to the side wall of the valve body, of the sealing cover, a spring buckle is fixedly connected in the groove, and the spring buckle is clamped on the side wall of the top of the valve body.

Preferably, the spring buckle is arranged to be a right triangle, and the right angle surface of the spring buckle is clamped on the side wall of the top of the valve body.

Preferably, the oil inlet is internally threaded with a filter cartridge, and the filter cartridge is located at one end of the first pipeline.

The utility model has the beneficial effects that:

the utility model provides a control valve of a large-flow common rail oil sprayer, which is characterized in that oil enters a second cavity positioned at the bottom of a moving plate through an oil inlet, oil enters the second cavity along a first pipeline, when the oil pressure is increased to a certain index, the bottom of a needle valve is separated from an oil nozzle, so that the oil nozzle opens the oil spraying, but when the oil nozzle opens, the moving plate can just move to the top of the second pipeline, so that a small part of oil in the second cavity can enter the second cavity above the moving plate and the first cavity through the second pipeline, the oil lubricates the inner wall of the first cavity, the friction loss between a moving block and the inner wall of a valve body is reduced, and the air tightness of the valve body is not easy to drop.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is an overall perspective view of the present utility model;

FIG. 2 is a cutaway perspective view of the present utility model;

fig. 3 is an enlarged perspective view of fig. 2 at a;

fig. 4 is an enlarged perspective view of fig. 2 at B;

fig. 5 is a perspective view of the internal components of the valve body of the present utility model.

Legend description: 1. a valve body; 2. sealing cover; 3. an oil inlet; 4. an oil outlet; 5. a filter cartridge; 6. a sealing gasket; 7. a groove; 8. a spring buckle; 9. an adjusting block; 10. a first spring; 11. a moving block; 12. a jack; 13. fixing the column; 14. a rod; 15. a moving plate; 16. a second spring; 17. a needle valve; 18. a first cavity; 19. a second cavity; 20. a first pipe; 21. and a second pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Specific examples are given below.

Referring to fig. 1-5, the utility model provides a control valve of a high-flow common rail fuel injector, which comprises a valve body 1, wherein a first cavity 18 and a second cavity 19 are formed in the valve body 1, the first cavity 18 is positioned at the top of the second cavity 19, a moving block 11 is connected in a sliding manner in the first cavity 18, a fixed column 13 is fixedly connected to the bottom of the moving block 11, a jack 12 is formed in the fixed column 13, a plug rod 14 is inserted in the jack 12, a moving plate 15 is fixedly connected to the bottom of the plug rod 14, a spring II 16 is fixedly connected between the moving plate 15 and the fixed column 13, the spring II is sleeved on the side wall of the plug rod 14, a needle valve 17 is fixedly connected to the bottom of the moving plate 15, the moving plate 15 is connected to the inner wall of the second cavity 19 in a sliding manner, one end of the second cavity 19 far away from the first cavity 18 is provided with a fuel nozzle, the fuel nozzle penetrates through the valve body 1, one end of the needle valve 17 close to the fuel nozzle is inserted in the fuel nozzle, the side wall 1 is provided with a 3 and 4, the 4 is positioned in the side wall of the fuel nozzle, the first pipeline 21 is positioned below the first pipeline 21, the first pipeline 21 is positioned between the first pipeline and the second pipeline 20, the first pipeline 21 is positioned below the first pipeline 21, and the first pipeline 20 is positioned below the first pipeline 20; during operation, the valve body 1 is a precision part in the prior art, when the movable block 11 frequently moves in the valve body 1 due to oil pressure change, the movable block 11 is easy to wear, so that the air tightness in the valve body 1 is reduced, the control performance of the high-flow common rail oil injector control valve is affected, oil is fed into the second cavity 19 positioned at the bottom of the movable plate 15 along the first pipeline 20 through the oil inlet 3, when the oil continuously increases, the oil pressure in the second cavity 19 also continuously increases, when the oil pressure increases to a certain index, the pressure can resist the movable plate 15 to lift, the inserted rod 14 at the top of the movable plate 15 moves in the jack 12 of the fixed column 13 and presses the spring, the bottom of the needle valve 17 is separated from the oil nozzle, so that the oil nozzle opens the oil injection, but when the oil nozzle opens, the movable plate 15 just moves to the top of the second pipeline 21, so that small part of the oil in the second cavity 19 enters the second cavity 19 and the first cavity 18 through the second pipeline 21, so that the oil can lubricate the inner wall of the first cavity 18 continuously increases, when the oil can flow out of the valve body 1 through the second pipeline 21, the oil can not flow out of the valve body 1 through the second pipeline 21, the friction loss can be easily reduced, and the friction loss can not be reduced, and the valve body 1 can easily flow out of the valve body 1.

Further, as shown in fig. 2, the first cavity 18 is slidably connected with an adjusting block 9, the adjusting block 9 is located at the top of the moving block 11, and a first spring 10 is clamped between the adjusting block 9 and the moving block 11; in operation, the pressure required for the lifting of the moving block 11 is adjusted by rotating the adjusting block 9 and changing the position of the adjusting block 9 in the valve body 1 to change the compression force of the spring.

Further, as shown in fig. 2, the top of the valve body 1 is clamped with a sealing cover 2, the bottom of the sealing cover 2 is fixedly connected with a sealing gasket 6, and the sealing gasket 6 is clamped at the top of the inner wall of the valve body 1; when the sealing cover 2 works, the ash entering the valve body 1 can be prevented from causing the precision of parts in the valve body 1 to be reduced, and the sealing gasket 6 can further seal the valve body 1.

Further, as shown in fig. 4, a groove 7 is formed in one surface of the sealing cover 2, which is close to the side wall of the valve body 1, a spring buckle 8 is fixedly connected in the groove 7, and the spring buckle 8 is clamped on the side wall of the top of the valve body 1; when the sealing cover 2 is installed in operation, the sealing gasket 6 is aligned to the top of the valve body 1, and then the sealing cover 2 is pressed, so that the spring buckle 8 is compressed into the groove 7 first and then stretches out to be clamped on the side wall of the valve body 1.

Further, as shown in fig. 4, the spring buckle 8 is configured as a right triangle, and a right angle surface of the spring buckle 8 is clamped on a side wall of the top of the valve body 1; when the valve is in operation, the right-angle edge of the spring buckle 8 can be clamped with the side wall of the valve body 1, so that the sealing cover 2 is not easy to separate from the valve body 1, and the spring buckle 8 can be taken down only by extruding the sealing cover 2.

Further, as shown in fig. 3, the oil inlet 3 is internally connected with a filter cartridge 5 in a threaded manner, and the filter cartridge 5 is located at one end of the first pipeline 20; in operation, the filter housing can filter impurities in the oil, and prevent the impurities from entering the valve body 1 to block the first pipeline 20.

Working principle: in the prior art, the valve body 1 is a precise part, when the movable block 11 frequently moves in the valve body 1 due to oil pressure change, the movable block 11 is easy to wear, so that the air tightness in the valve body 1 is reduced, the control performance of the high-flow common rail oil injector control valve is affected, oil is fed through the oil inlet 3, the oil enters the second cavity 19 positioned at the bottom of the movable plate 15 along the first pipeline 20, when the oil continuously increases, the oil pressure in the second cavity 19 also continuously increases, when the oil pressure increases to a certain index, the pressure can prop against the movable plate 15 to lift, the inserted rod 14 at the top of the movable plate 15 moves in the jack 12 of the fixed column 13 and presses the spring, the bottom of the needle valve 17 is separated from the oil nozzle, so that the oil nozzle opens the oil injection, but when the oil nozzle opens, the movable plate 15 just moves to the top of the second pipeline 21, so that a small part of the oil in the second cavity 19 enters the second cavity 19 and the first cavity 18 through the second pipeline 21, so that the oil can lubricate the inner wall of the first cavity 18, and the oil can flow out of the valve body 1 from the second pipeline 21 through the second pipeline 21 and flow out of the jack 12 and the oil injector 1, the oil leakage loss can not be reduced, and the air tightness of the valve body 1 can be easily reduced, and the valve body 1 can not be recovered.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The utility model provides a large-traffic common rail fuel injector control valve, includes valve body (1), its characterized in that: a first cavity (18) and a second cavity (19) are formed in the valve body (1), the first cavity (18) is located at the top of the second cavity (19), a moving block (11) is connected in a sliding mode in the first cavity (18), a fixed column (13) is fixedly connected to the bottom of the moving block (11), an inserting hole (12) is formed in the fixed column (13), an inserting rod (14) is inserted in the inserting hole (12), a moving plate (15) is fixedly connected to the bottom of the inserting rod (14), a spring II (16) is fixedly connected between the moving plate (15) and the fixed column (13), a side wall of the inserting rod (14) is sleeved with the spring II (16), a needle valve (17) is fixedly connected to the bottom of the moving plate (15), the moving plate (15) is connected to the inner wall of the second cavity (19) in a sliding mode, one end, far away from the first cavity (18), of the needle valve (1) is arranged at the end, close to the needle valve (17) is inserted into the oil nozzle, one end, close to the needle valve (1), an oil inlet (4) is arranged at the inner side wall of the oil inlet (4), and is communicated with the oil outlet (4) and is arranged at the top of the oil inlet (4), the valve body (1) is located between the oil inlet (3) and the second cavity (19) and is provided with a first pipeline (20), the valve body (1) is located between the first cavity (18) and the second cavity (19) and is provided with a second pipeline (21), the first pipeline (20) is located below the moving plate (15), and the second pipeline (21) is located above the moving plate (15).

2. A high flow common rail injector control valve as defined in claim 1, wherein: the first cavity (18) is slidably connected with an adjusting block (9), the adjusting block (9) is located at the top of the moving block (11), and a first spring (10) is clamped between the adjusting block (9) and the moving block (11).

3. A high flow common rail injector control valve as defined in claim 2, wherein: the sealing device is characterized in that the top of the valve body (1) is clamped with a sealing cover (2), a sealing gasket (6) is fixedly connected to the bottom of the sealing cover (2), and the sealing gasket (6) is clamped at the top of the inner wall of the valve body (1).

4. A high flow common rail injector control valve as recited in claim 3, wherein: the sealing cover (2) is close to one side of the side wall of the valve body (1) and provided with a groove (7), a spring buckle (8) is fixedly connected in the groove (7), and the spring buckle (8) is clamped on the side wall of the top of the valve body (1).

5. The high flow common rail injector control valve of claim 4, wherein: the spring buckle (8) is arranged to be a right triangle, and the right angle surface of the spring buckle (8) is clamped on the side wall of the top of the valve body (1).

6. The high flow common rail injector control valve of claim 5, wherein: the oil inlet (3) is internally connected with a filter cartridge (5) in a threaded mode, and the filter cartridge (5) is located at one end of the first pipeline (20).