Needle valve matching part of needle valve body oil inlet structure

Abstract

The utility model discloses a needle valve matching part of a needle valve body oil inlet structure, which comprises a needle valve body, an oil conveying channel is arranged inside the needle valve body, a needle valve is slidably connected inside the oil conveying channel, buffer holes are symmetrically arranged on one side inside the needle valve, an oil spray nozzle is fixedly connected to the lower end inside the needle valve body, and the oil spray nozzle is fixedly connected to the lower end inside the needle valve body. The lower end of the interior of the needle valve body is symmetrically provided with a sealing groove, one side of the interior of the sealing groove is symmetrically and fixedly connected with a mounting seat, and one side of the mounting seat is fixedly connected with a spring, during use, the sealing groove is formed in the position, close to an oil nozzle, of the lower end of the interior of the needle valve body, and a sealing ring is mounted on one side of the fixing seat; the needle valve slides between the interior of the oil conveying channel and the needle valve body, so that oil enters the oil conveying channel in the needle valve body from the oil inlet channel, through operation of the needle valve, the sealing ring is compressed to enable the spring to stretch out and draw back, and the oil is conveyed to the oil spraying nozzle along the oil conveying channel in the needle valve body to be sprayed.

Description

Technical Field

[0001] The utility model belongs to the technical field of needle valve pairs, and particularly relates to a needle valve pair with an oil inlet structure for a needle valve body. Background Technique

[0002] The fuel injection system is the "heart" of a diesel engine. The needle valve pair is a core component of the fuel injection system. The injector body is an important part of the fuel system of a marine diesel engine. The needle valve pair, nozzle, etc. are all installed on the injector body. The needle valve pair and nozzle directly determine the atomization quality, ensure perfect combustion, and ensure the thermal efficiency of the diesel engine. It is a key factor affecting the operating conditions of the main engine and is crucial for the normal and safe navigation of the ship. As an important part of the diesel engine, the working condition of the injector will directly affect the performance of the diesel engine.

[0003] For some existing needle valve pairs, the sealing effect is poor, and there is a lack of a sealing structure at the bottom. After the needle valve has been used for a long time, the remaining oil inside it is likely to seep out from the nozzle at the bottom of the needle valve, which is not conducive to improving the sealing effect. Over time, it will cause energy waste and environmental pollution, affecting the overall structure and the service life of the diesel engine. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a needle valve pair with an oil inlet structure for a needle valve body, so as to solve the problems of some existing needle valve pairs in the above background technique, such as poor sealing effect, lack of a sealing structure at the bottom, and after the needle valve has been used for a long time, the remaining oil inside it is likely to seep out from the nozzle at the bottom of the needle valve, which is not conducive to improving the sealing effect. Over time, it will cause energy waste and environmental pollution, affecting the overall structure and the service life of the diesel engine.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A needle valve pair with an oil inlet structure for a needle valve body, including a needle valve body. An oil delivery channel is arranged inside the needle valve body. A needle valve is slidably connected inside the oil delivery channel. Buffer holes are symmetrically arranged on one side inside the needle valve. An injector nozzle is fixedly connected to the lower end inside the needle valve body. Sealing grooves are symmetrically arranged at the lower end inside the needle valve body. Mounting seats are symmetrically and fixedly connected to one side inside the sealing grooves. A spring is fixedly connected to one side of the mounting seat. A fixing seat is fixedly connected to one end of the spring. A sealing ring is fixedly connected to one side of the fixing seat.

[0006] Preferably, protective pads are fixedly connected to both adjacent sides of the mounting seat.

[0007] Preferably, the protective pads are made of wear-resistant materials.

[0008] Preferably, an oil inlet channel is arranged inside the needle valve body.

[0009] Preferably, a reserved groove is provided at the lower end inside the needle valve.

[0010] Preferably, a pressure accumulation cavity is provided at the upper end of the sealing groove, and the pressure accumulation cavity is arranged inside the needle valve body.

[0011] Preferably, the outer surfaces of the buffer hole, the pressure accumulation cavity, the reserved groove and the sealing ring are all annular.

[0012] Preferably, two sealing grooves, mounting seats, springs and fixed seats are symmetrically arranged, and a plurality of buffer holes are provided.

[0013] Compared with the prior art, the present invention provides a needle valve couple with a needle valve body oil inlet structure, and has the following beneficial effects:

[0014] 1. By setting the sealing ring, when in use, a sealing groove is provided at the lower end inside the needle valve body near the fuel injector, the sealing ring is installed on one side of the fixed seat, the needle valve slides between the oil delivery channel and the needle valve body, so that the oil fluid enters the oil delivery channel inside the needle valve body from the oil inlet channel. Through the operation of the needle valve, the sealing ring is compressed to make the spring expand and contract, and the oil fluid is sent to the fuel injector through the oil delivery channel inside the needle valve body for fuel injection. As the fuel pressure increases, the needle valve rises, and the oil fluid is sprayed into the cylinder through the fuel injector of the needle valve. As the fuel pressure decreases, the needle valve descends, and the sealing ring contacts the tangent plane of the needle valve, which can prevent the remaining oil fluid inside from leaking out from the fuel injector at the bottom of the needle valve, and can play a role in extending the service life of the structure to a certain extent.

[0015] 2. By setting the protective pad, the protective pad plays a protective role for the sealing ring in the sealing groove, and can prevent the sealing ring from being worn due to friction when retracting and stretching into the sealing groove.

[0016] Parts not involved in this device are the same as the prior art or can be implemented by using the prior art. The structure of the present invention is scientific and reasonable, safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0018] Figure 1 is an axonometric structure schematic diagram of a needle valve couple with a needle valve body oil inlet structure proposed by the present invention;

[0019] Figure 2Schematic front vertical sectional view of a needle valve couple with an oil inlet structure for the needle valve body proposed by the present utility model;

[0020] Figure 3 For Figure 2 Enlarged schematic view of the structure at position A;

[0021] Figure 4 Schematic top horizontal sectional view of a needle valve couple with an oil inlet structure for the needle valve body proposed by the present utility model;

[0022] Figure 5 For Figure 4 Enlarged schematic view of the structure at position B;

[0023] Figure 6 Schematic side view of a needle valve couple with an oil inlet structure for the needle valve body proposed by the present utility model;

[0024] Figure 7 Schematic top view of a needle valve couple with an oil inlet structure for the needle valve body proposed by the present utility model;

[0025] In the figure: needle valve body 1, oil inlet passage 2, oil delivery passage 3, needle valve 4, buffer hole 5, pressure accumulation chamber 6, reserved groove 7, fuel injector 8, sealing groove 9, mounting seat 10, spring 11, fixing seat 12, sealing ring 13, protective pad 14. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-7, the present utility model provides a technical solution: a needle valve couple with an oil inlet structure for a needle valve body, including a needle valve body 1, an oil delivery channel 3 is arranged inside the needle valve body 1, a needle valve 4 is slidably connected inside the oil delivery channel 3, buffer holes 5 are symmetrically arranged on one side inside the needle valve 4, an injector nozzle 8 is fixedly connected to the lower end inside the needle valve body 1, sealing grooves 9 are symmetrically arranged at the lower end inside the needle valve body 1, mounting seats 10 are symmetrically and fixedly connected to one side inside the sealing grooves 9, a spring 11 is fixedly connected to one side of the mounting seat 10, a fixing seat 12 is fixedly connected to one end of the spring 11, and a sealing ring 13 is fixedly connected to one side of the fixing seat 12. When in use, a sealing groove 9 is arranged near the injector nozzle 8 at the lower end inside the needle valve body 1, the sealing ring 13 is installed on one side of the fixing seat 12, the needle valve 4 slides between the oil delivery channel 3 inside the needle valve body 1 and the needle valve body 1, so that the oil fluid enters the oil delivery channel 3 inside the needle valve body 1 from the oil inlet channel 2. Through the operation of the needle valve 4, the sealing ring 13 is compressed to make the spring 11 expand and contract, and the oil fluid is sent to the injector nozzle 8 along the oil delivery channel 3 inside the needle valve body 1 for oil injection. As the fuel pressure increases, the needle valve 4 rises, and the oil fluid is sprayed into the cylinder through the fuel injector nozzle 8 of the needle valve 4. As the fuel pressure decreases, the needle valve 4 descends, and the sealing ring 13 contacts the cut surface of the needle valve 4, which can prevent the remaining oil fluid inside from leaking out from the injector nozzle 8 at the bottom of the needle valve, and can play a role in extending the structural life to a certain extent.

[0028] In the present utility model, preferably, protective pads 14 are fixedly connected to both adjacent sides of the mounting seat 10. The protective pads 14 play a protective role for the sealing ring 13 in the sealing groove 9, and can prevent the sealing ring 13 from being worn due to friction when retracting and stretching into the sealing groove 9.

[0029] In the present utility model, preferably, the protective pads 14 are made of wear-resistant materials.

[0030] In the present utility model, preferably, an oil inlet channel 2 is arranged inside the needle valve body 1.

[0031] In the present utility model, preferably, a reserved groove 7 is arranged at the lower end inside the needle valve 4.

[0032] In the present utility model, preferably, a pressure accumulation cavity 6 is arranged at the upper end of the sealing groove 9, and the pressure accumulation cavity 6 is arranged inside the needle valve body 1.

[0033] In the present utility model, preferably, the outer surfaces of the buffer holes 5, the pressure accumulation cavity 6, the reserved groove 7 and the sealing ring 13 are all annular.

[0034] In the present utility model, preferably, two sealing grooves 9, mounting seats 10, springs 11 and fixing seats 12 are symmetrically arranged, and a plurality of buffer holes 5 are arranged.

[0035] Working principle and usage process of the present utility model: During use, a sealing groove 9 is provided at the lower end inside the needle valve body 1 near the fuel injector 8. The sealing ring 13 is installed on one side of the fixing seat 12. The needle valve 4 slides between the inside of the oil delivery passage 3 and the needle valve body 1, so that the oil fluid enters the oil delivery passage 3 inside the needle valve body 1 from the oil inlet passage 2. Through the operation of the needle valve 4, the sealing ring 13 is compressed to make the spring 11 expand and contract, and the oil fluid is sent to the fuel injector 8 through the oil delivery passage 3 inside the needle valve body 1 for fuel injection. As the fuel pressure increases, the needle valve 4 rises, and the oil fluid is sprayed into the cylinder through the fuel injector 8 of the needle valve 4. As the fuel pressure decreases, the needle valve 4 descends, and the sealing ring 13 contacts the tangent plane of the needle valve 4, which can prevent the oil fluid remaining inside from leaking out from the fuel injector 8 at the bottom of the needle valve, and can play a role in extending the structural life to a certain extent. By providing the protective pad 14, the protective pad 14 plays a protective role for the sealing ring 13 in the sealing groove 9, and can prevent the sealing ring 13 from being worn due to friction during retraction and stretching into the sealing groove 9.

[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A needle valve pair with an oil inlet structure for a needle valve body, comprising a needle valve body (1), characterized in that: An oil delivery passage (3) is provided inside the needle valve body (1), a needle valve (4) is slidably connected inside the oil delivery passage (3), buffer holes (5) are symmetrically arranged on one side inside the needle valve (4), an injection nozzle (8) is fixedly connected to the lower end inside the needle valve body (1), sealing grooves (9) are symmetrically arranged at the lower end inside the needle valve body (1), mounting seats (10) are symmetrically and fixedly connected to one side inside the sealing grooves (9), a spring (11) is fixedly connected to one side of the mounting seat (10), a fixed seat (12) is fixedly connected to one end of the spring (11), and a sealing ring (13) is fixedly connected to one side of the fixed seat (12).

2. The needle valve coupling with an oil inlet structure of a needle valve body according to claim 1, characterized in that: Protective pads (14) are fixedly connected to both adjacent sides of the mounting seat (10).

3. The needle valve couple of a needle valve body oil inlet structure according to claim 2, characterized in that: The protective pads (14) are made of wear-resistant materials.

4. The needle valve couple with an oil inlet structure of a needle valve body according to claim 1, characterized in that: An oil inlet passage (2) is provided inside the needle valve body (1).

5. The needle valve couple with an oil inlet structure of the needle valve body according to claim 1, characterized in that: A reserved groove (7) is arranged at the lower end inside the needle valve (4).

6. The needle valve coupling with an oil inlet structure of the needle valve body according to claim 1, characterized in that: A pressure accumulation chamber (6) is arranged at the upper end of the sealing groove (9), and the pressure accumulation chamber (6) is arranged inside the needle valve body (1).

7. A needle valve couple with an oil inlet structure for a needle valve body according to claim 1, characterized in that: The outer surfaces of the buffer holes (5), the pressure accumulation chamber (6), the reserved groove (7), and the sealing ring (13) are all annular in shape.

8. The needle valve couple with an oil inlet structure of a needle valve body according to claim 1, characterized in that: Two sealing grooves (9), mounting seats (10), springs (11), and fixed seats (12) are symmetrically arranged, and a plurality of buffer holes (5) are provided.

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