Engine fuel nozzle testing device

Abstract

The utility model relates to the technical field of fuel nozzles, in particular to an engine fuel nozzle testing device which comprises a gas injection pipe, a nozzle body is arranged on the gas injection pipe, and a first threaded column and a second threaded column which are used for improving the stability of the nozzle body are arranged on the gas injection pipe. The first threaded column is provided with an abutting block used for fixing the nozzle body, the second threaded column is provided with a detector used for detecting the airtightness of the nozzle body, and the detector is provided with a plurality of second connecting bodies used for capturing airflow. Through the arrangement of the abutting block and the detector, the overall stability of the nozzle body can be improved before testing, the phenomenon that airflow penetrates through the nozzle body and shakes is avoided, meanwhile, the abutting block is limited by the first threaded column, movement caused by airflow interference is further reduced, and meanwhile the detector is limited by the second threaded column, so that the detection accuracy is improved. The influence of airflow on the airtightness detection effect can be effectively reduced, and the detection efficiency of each nozzle body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel nozzles, in particular to a testing device for an engine fuel nozzle. Background Art

[0002] The fuel nozzle is a special nozzle for atomizing fuel and can produce hollow and solid spray patterns. When the fuel pressure in the oil chamber exceeds the set value, the oil valve opens and the fuel is sprayed out through the nozzle cap. The oil valve consists of a valve body, a valve seat and a spring. The rear end of the valve seat is connected to the chamber to form an oil chamber. The chamber is provided with an inlet channel to enter the oil chamber. The spring is located in the oil chamber and acts between the valve body and the valve seat to close the oil valve. The front end of the valve seat is connected to the nozzle cap to form a residual volume. The nozzle cap is provided with a spray hole connected to the residual volume.

[0003] As a major component inside the engine, the existing fuel nozzle needs to pass several inspection processes during the production process before it can be shipped. Secondly, the fuel nozzle mainly sprays fuel into the engine cavity, and its airtightness is extremely important. Steam injection is usually used to test whether the fuel nozzle meets the standards. However, the existing technology usually uses an air gun to test whether the fuel nozzle meets the standards, and the fuel nozzle is only fixed by a simple component, which reduces the testing effect of the fuel nozzle.

[0004] To this end, we designed an engine fuel nozzle testing device. Utility Model Content

[0005] The utility model aims to provide an engine fuel nozzle testing device in order to solve the problem of low testing effect in the prior art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An engine fuel nozzle testing device includes an air injection pipe, a nozzle body is provided on the air injection pipe, and a first threaded column and a second threaded column are provided on the air injection pipe for improving the stability of the nozzle body;

[0008] The first threaded column is provided with a stop block for fixing the nozzle body, the second threaded column is provided with a detector for detecting the airtightness of the nozzle body, and the detector is provided with a plurality of second connectors for capturing airflow.

[0009] Preferably, a rubber ring for limiting the length of the nozzle body is provided on the first threaded column, a thread is provided on the inner wall of the block, and the first threaded column is adapted to the inner wall of the block.

[0010] Preferably, the block is provided with a plurality of first connectors for improving the stability of the nozzle body, one end of the first connector is fixedly connected to the block by welding, and the other end is against the nozzle body, and the first connector is provided with a first reinforcing rod for improving the effect.

[0011] Preferably, the detector is fixedly connected to the second threaded column via a washer, a cavity is provided in the gas injection pipe, and a plurality of holes for testing the airtightness of the nozzle body are provided in the cavity.

[0012] Preferably, one end of the second connector is fixedly connected to the detector by welding, and the other end is against the nozzle body. A second reinforcing rod is provided in the second connector to increase the fixing effect, and a compression rod is provided on the second reinforcing rod to absorb impact.

[0013] Preferably, the gas injection pipe is provided with a first support rod and a second support rod for lifting the nozzle body.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model improves the overall stability of the nozzle body before testing by setting the stop block and the detector, avoiding the shaking of the air flow through the nozzle body. At the same time, the stop block is restricted by the first threaded column, further reducing the movement caused by air flow interference. At the same time, the detector is restricted by the second threaded column, which can effectively reduce the effect of air flow on air tightness detection, thereby improving the detection efficiency of each nozzle body.

[0016] 2. The utility model arranges the first connector and the second connector so that the block increases the restriction on the nozzle body. At the same time, the first reinforcing rod in the first connector can improve the stability of the tail end of the nozzle body and avoid the shaking caused by the airflow passing through. The second connector, under the action of the second reinforcing rod, improves the efficiency of the detector in the airtight test of the front end of the nozzle body and improves the capture effect of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an engine fuel nozzle testing device proposed by the utility model;

[0018] Figure 2 for Figure 1 A-marked structure enlarged view;

[0019] Figure 3 for Figure 1 A magnified view of the structure marked with B in the middle;

[0020] Figure 4 This is an internal cross-sectional view of an engine fuel nozzle testing device proposed by the present invention.

[0021] In the figure: 1. Gas injection tube; 2. Rubber ring; 3. First threaded column; 4. Second threaded column; 5. Nozzle body; 6. Detector; 7. Stop block; 8. First support rod; 9. Second support rod; 10. First connector; 11. First reinforcement rod; 12. Second connector; 13. Second reinforcement rod; 14. Compression rod. DETAILED DESCRIPTION

[0022] Reference Figures 1-4 , an engine fuel nozzle testing device, including an air injection pipe 1, the air injection pipe 1 is a component used for air tightness detection in the prior art, and air is injected into the interior through an external power supply and a gas reservoir, so that the nozzle body 5 mounted on the air injection pipe 1 is subjected to air tightness detection. The nozzle body 5 is a fuel nozzle used for an engine in the prior art, and is cylindrical as a whole. The first threaded column 3 and the second threaded column 4 are threaded rods in the prior art, which are used to fix the following block 7 and the detector 6.

[0023] The first threaded column 3 is provided with a block 7 for fixing the nozzle body 5. The block 7 is in a circular ring shape and is made of aluminum alloy as a whole. It is mainly used to fix the tail end of the nozzle body 5 to reduce the shaking caused by the airflow during the airtightness detection process. The first threaded column 3 is provided with a rubber ring 2 for limiting the length of the nozzle body 5. The rubber ring 2 is made of existing soft rubber and is mainly used to limit the maximum adjustment distance of the block 7 on the first threaded column 3, and is also used to limit the maximum specification of the nozzle body 5. The inner wall of the block 7 is provided with a thread, and the first threaded column 3 is adapted to the inner wall of the block 7. The inner wall of the block 7 is provided with a thread groove matching the first threaded column 3, and the block 7 moves on the first threaded column 3 by rotation.

[0024] The block 7 is provided with a plurality of first connectors 10 for improving the stability of the nozzle body 5. The first connector 10 is mainly used to improve the tightening effect of the block 7 on the nozzle body 5, so that the nozzle body 5 can reduce the shaking phenomenon during the airtightness detection process. At the same time, the first connector 10 is conducive to reducing the airflow resistance. One end of the first connector 10 is fixedly connected to the block 7 by welding. Welding is a connection method in the prior art. While improving the connection strength between the two, there is no need to worry about the two being broken. The other end is offset against the nozzle body 5, and the offset can effectively transmit the airflow and force during the shaking process. A first reinforcing rod 11 for improving the effect is provided in the first connector 10. The first reinforcing rod 11 is used to buffer the force caused by the shaking.

[0025] The second threaded column 4 is provided with a detector 6 for detecting the airtightness of the nozzle body 5. The detector 6 is annular as a whole and faces one side of the nozzle body 5. It is a component used to detect the airflow density in the prior art. This component needs to be fixed in the detector 6 by fasteners. The detector 6 is fixedly connected to the second threaded column 4 by a gasket. The gasket is an auxiliary component used to protect the inner wall of the detector 6 to avoid wear caused by movement on the second threaded column 4. A cavity is provided in the gas injection pipe 1. The cavity is a built-in cavity for conveying gas in the gas injection pipe 1, and a plurality of holes are provided in the cavity for testing the airtightness of the nozzle body 5. The holes are only provided at the bottom of the nozzle body 5 and completely penetrate the inner wall of the gas injection pipe 1 and are connected to the inner wall of the nozzle body 5 for detecting the airtightness of the nozzle body 5 on the gas injection pipe 1.

[0026] The detector 6 is provided with a plurality of second connectors 12 for capturing airflow. The second connectors 12 are used to improve the connection effect between the detector 6 and the nozzle body 5. One end of the second connector 12 is fixedly connected to the detector 6 by welding. Welding is a connection method in the prior art. While improving the connection strength between the two, there is no need to worry about the two being broken. The other end is offset against the nozzle body 5. The offset effect can improve the stability of the nozzle body 5. A second reinforcing rod 13 is provided in the second connector 12 to increase the fixing effect. The second reinforcing rod 13 reduces shaking while increasing the fixing effect. A compression rod 14 for absorbing impact is provided on the second reinforcing rod 13. The compression rod 14 is used to absorb and disperse the force and airflow generated by shaking.

[0027] The gas injection pipe 1 is provided with a first support rod 8 and a second support rod 9 for lifting the nozzle body 5. The first support rod 8 and the second support rod 9 are respectively fixed to both sides of the gas injection pipe 1 for overhead support.

[0028] The working principle of this utility model is as follows:

[0029] Ensure that the gas injection pipe 1, nozzle body 5, detector 6 and other components are intact, put the nozzle body 5 on the gas injection pipe 1, ensure that its tail end is in close contact with the block 7, adjust the position of the rubber ring 2 and the block 7 to limit the maximum specification and length of the nozzle body 5, and fix the block 7 in a suitable position through the threaded groove on the first threaded column 3 to ensure that the nozzle body 5 is stable. Use the first connector 10 to improve the tightening effect of the block 7 on the nozzle body 5 and reduce the shaking phenomenon. Fix the detector 6 on the second threaded column 4 through the gasket so that it faces the side of the nozzle body 5, start the external power supply and gas reservoir, inject air into the gas injection pipe 1, observe the changes in airflow density on the detector 6, and judge the airtightness of the nozzle body 5.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An engine fuel nozzle test device, comprising an air injection pipe (1), a nozzle body (5) provided on the air injection pipe (1), a first threaded column (3) and a second threaded column (4) for improving the stability of the nozzle body (5), characterized in that ； The first threaded column (3) is provided with a stop block (7) for fixing the nozzle body (5), the second threaded column (4) is provided with a detector (6) for detecting the airtightness of the nozzle body (5), and the detector (6) is provided with a plurality of second connectors (12) for capturing airflow.

2. The engine fuel nozzle testing device according to claim 1, characterized in that: The first threaded column (3) is provided with a rubber ring (2) for limiting the length of the nozzle body (5); the inner wall of the stop block (7) is provided with threads, and the first threaded column (3) is adapted to the inner wall of the stop block (7).

3. The engine fuel nozzle testing device according to claim 1, characterized in that: The stop block (7) is provided with a plurality of first connectors (10) for improving the stability of the nozzle body (5); one end of the first connector (10) is fixedly connected to the stop block (7) by welding, and the other end is against the nozzle body (5); a first reinforcing rod (11) for improving the effect is provided inside the first connector (10).

4. The engine fuel nozzle testing device according to claim 1, characterized in that: The detector (6) is fixedly connected to the second threaded column (4) via a gasket, and a cavity is provided in the gas injection pipe (1), and a plurality of holes for testing the airtightness of the nozzle body (5) are provided in the cavity.

5. The engine fuel nozzle testing device according to claim 1, characterized in that: One end of the second connecting body (12) is fixedly connected to the detector (6) by welding, and the other end is against the nozzle body (5). A second reinforcing rod (13) for increasing the fixing effect is provided in the second connecting body (12), and a compression rod (14) for absorbing impact is provided on the second reinforcing rod (13).

6. The engine fuel nozzle testing device according to claim 1, characterized in that: The gas injection pipe (1) is provided with a first support rod (8) and a second support rod (9) for raising the nozzle body (5).

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