Needle valve of hole type oil nozzle of diesel engine

Abstract

The utility model provides a needle valve of a hole type oil nozzle of a diesel engine, which relates to the technical field of oil nozzle needle valves and comprises a needle valve body, a needle valve component is slidably connected in the needle valve body and comprises a needle valve main body, and a filter disc is sleeved at the top end of the needle valve main body. A plurality of first grooves are formed in the periphery of the filtering disc in a surrounding mode, first balls are rotationally connected into the first grooves, and the first balls can make rolling contact with the needle valve body in the first grooves when the needle valve body slides up and down, so that the friction force between the filtering disc and the needle valve body is reduced; by means of the filtering disc, small particles in fuel oil can be effectively filtered and blocked, the service life of equipment is effectively prolonged, friction force between the needle valve body and the needle valve body can be reduced through cooperative use of a first groove, a first ball, a second groove and a second ball, and practicability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection nozzle needle valves, in particular to a needle valve of a hole-type fuel injection nozzle of a diesel engine. Background Art

[0002] A diesel engine hole-type fuel injector needle valve is a type of diesel engine fuel injector. Its working principle is based on the electromagnetic principle. When the electromagnetic coil is connected to the current, it releases a strong force, lifting the needle valve, instantly opening the spray hole, allowing the fuel to spray out like a mist, promoting efficient fuel combustion. The fuel injection port of the hole-type fuel injector is formed by drilling a hole in the metal surface, and the resulting fuel beam is conical. It is suitable for most engines. This type of fuel injector has a simple structure and forms a uniform fuel beam when injecting fuel, which helps improve combustion efficiency.

[0003] The needle valve structure of a common diesel engine hole-type fuel injector is relatively simple, presenting a smooth cylindrical structure. However, the structure of the fuel injector is relatively precise, and the gap between the needle valve and the inner wall of the needle valve body is usually very narrow. When tiny particles in the fuel enter the gap, the needle valve can easily get stuck, resulting in a shortened service life. Therefore, we propose a needle valve for a diesel engine hole-type fuel injector. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art. The needle valve structure of the common diesel engine hole-type fuel injector is relatively simple, presenting a smooth-surfaced columnar structure, while the structure of the fuel injector is relatively precise. Usually, the gap between the needle valve and the inner wall of the needle valve body is very narrow. When tiny particles in the fuel enter the gap, the needle valve is easily stuck, thereby reducing its service life.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A needle valve for a diesel engine hole-type fuel injection nozzle comprises a needle valve body, wherein a needle valve assembly is slidably connected to the interior of the needle valve body;

[0007] The needle valve assembly includes a needle valve body, a filter disc is sleeved on the top end of the needle valve body, a plurality of first grooves are formed around the periphery of the filter disc, a first ball is rotatably connected inside the first groove, and the first ball can roll in contact with the needle valve body inside the first groove when the needle valve body slides up and down, thereby reducing the friction between the filter disc and the needle valve body. A fixing column is sleeved on the top end of the needle valve body and located above the filter assembly.

[0008] As a preferred solution of the present invention, a filter chamber is provided at the top of the needle valve body, a pressure chamber is provided inside the needle valve body and below the filter chamber, a spray hole is provided around the periphery of the needle valve body near the bottom, and the filter chamber, pressure chamber and spray hole are connected.

[0009] The technical effect of adopting the above further solution is that the fuel enters the interior of the pressure chamber through the filter chamber and is finally sprayed out through the spray hole to complete the fuel injection operation.

[0010] As a preferred solution of the present invention, the needle valve body is made of a wear-resistant alloy material, and its bottom is a circular structure.

[0011] The technical effect of adopting the above further solution is that the wear resistance of the needle valve body can be improved by using the wear-resistant alloy material, thereby extending the service life.

[0012] As a preferred solution of the present invention, a plurality of second grooves are equidistantly formed on the periphery of the needle valve body from top to bottom, and a second ball is rotatably connected to the interior of the second groove.

[0013] The technical effect of adopting the above further solution is that the second ball can roll in contact with the needle valve body inside the second groove when the needle valve body slides up and down, thereby reducing friction.

[0014] As a preferred solution of the present invention, the periphery of the needle valve body and the area below the filter disc and above the second ball is a conical structure.

[0015] The technical effect of adopting the above further solution is: through the conical structure and design, the needle valve body can be limited to prevent it from sliding downward excessively, thereby improving the stability of use.

[0016] As a preferred solution of the present invention, a 0.01-0.55 mm filter element is fixedly connected to the interior of the filter disc, and the gap between the outer periphery of the filter disc and the inner wall of the needle valve body is 0.01-0.55 mm.

[0017] The technical effect of adopting the above further solution is that the 0.01-0.55mm filter element can effectively filter and block tiny particles in the fuel, and can also prevent tiny particles from passing through the gap between the filter disc and the inner wall of the needle valve body, thereby improving the stability of use.

[0018] As a preferred solution of the present invention, sealing rings are symmetrically provided on the periphery of the needle valve body and at the top and bottom of the filter disc.

[0019] The technical effect of adopting the above further solution is that the gap between the needle valve body and the filter disc can be sealed by the sealing ring, thereby improving the filtering effect.

[0020] As a preferred solution of the present invention, a slot is provided at the bottom of the fixing column, a threaded rod is welded inside the slot, and the threaded rod is threadedly connected to the needle valve body.

[0021] The technical effect of adopting the above further solution is that the fixing column can be rotated by the threaded rod to connect or separate it from the needle valve body, thereby facilitating the installation of the filter disc.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In the utility model, through the design of the needle valve body and the needle valve assembly, the use of the filter disc can effectively filter and block the tiny particles in the fuel, prevent them from affecting the movement of the needle valve body, and effectively improve the service life of the equipment. Through the coordinated use of the first groove, the first ball, the second groove and the second ball, the friction between the needle valve body and the needle valve body can be reduced, greatly improving the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a needle valve of a diesel engine hole-type fuel injection nozzle provided by the utility model;

[0025] Figure 2 This is an overall side structural anatomical diagram of a needle valve of a diesel engine hole-type fuel injection nozzle provided by the utility model;

[0026] Figure 3 This is an anatomical diagram of the overall top structure of a needle valve of a diesel engine hole-type fuel injection nozzle provided by the utility model;

[0027] Figure 4 This is an enlarged schematic diagram of structure A of a needle valve of a hole-type fuel injection nozzle for a diesel engine provided by the utility model.

[0028] Legend: 1. Needle valve body; 101. Filter chamber; 102. Pressure chamber; 103. Spray hole; 2. Needle valve assembly; 201. Needle valve body; 202. Filter disc; 203. First groove; 204. First ball; 205. Fixing column; 2051. Slot; 2052. Threaded rod; 206. Second groove; 207. Second ball. DETAILED DESCRIPTION

[0029] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] Example 1

[0034] like Figure 1-4 As shown, the utility model provides a technical solution: a needle valve for a diesel engine hole-type fuel injector, comprising a needle valve body 1, a needle valve assembly 2 being slidably connected to the interior of the needle valve body 1, the needle valve assembly 2 comprising a needle valve body 201, a filter disc 202 being sleeved on the top end of the needle valve body 201, a plurality of first grooves 203 being opened around the periphery of the filter disc 202, a first ball 204 being rotatably connected to the interior of the first groove 203, the first ball 204 being able to roll in contact with the needle valve body 1 inside the first groove 203 when the needle valve body 201 slides up and down, thereby reducing the friction between the filter disc 202 and the needle valve body 1, a fixing column 205 being sleeved on the top end of the needle valve body 201 and located above the filter disc 202.

[0035] Example 2

[0036] like Figure 1-4As shown, a filter chamber 101 is provided at the top of the needle valve body 1, a pressure chamber 102 is provided inside the needle valve body 1 and below the filter chamber 101, and a spray hole 103 is provided around the periphery of the needle valve body 1 near the bottom. The filter chamber 101, the pressure chamber 102 and the spray hole 103 are connected. The fuel enters the pressure chamber 102 through the filter chamber 101 and is finally sprayed out through the spray hole 103 to complete the fuel injection operation. The needle valve body 201 is made of a wear-resistant alloy material, and its bottom is a circular structure. The wear-resistant alloy material can improve the needle valve body 2 01's wear resistance, extending service life, the outer periphery of the needle valve body 201 is provided with a plurality of second grooves 206 equidistantly from top to bottom, and the inner portion of the second groove 206 is rotatably connected to the second ball 207. The second ball 207 can roll in contact with the needle valve body 1 in the inner portion of the second groove 206 when the needle valve body 201 slides up and down, thereby reducing friction. The outer periphery of the needle valve body 201 and the area below the filter disc 202 and above the second ball 207 are tapered structures. Through the tapered structure and design, the needle valve can be The main body 201 is limited to prevent it from sliding downward excessively, thereby improving the stability of use. The interior of the filter disc 202 is fixedly connected with a 0.01-0.55mm filter element, and the gap between the outer periphery of the filter disc 202 and the inner wall of the needle valve body 1 is 0.01-0.55mm. The 0.01-0.55mm filter element can effectively filter and block the tiny particles in the fuel, and at the same time, it can also prevent the tiny particles from passing through the gap between the filter disc 202 and the inner wall of the needle valve body 1, thereby improving the stability of use. The needle valve main body 201 Sealing rings are symmetrically provided on the outer periphery and at the top and bottom of the filter disc 202. The sealing rings can seal the gap between the needle valve body 201 and the filter disc 202 to improve the filtering effect. A slot 2051 is provided at the bottom of the fixing post 205. A threaded rod 2052 is welded to the inside of the slot 2051. The threaded rod 2052 is threadedly connected to the needle valve body 201. The threaded rod 2052 can be used to rotate the fixing post 205 to connect or disconnect it from the needle valve body 201, thereby facilitating the installation of the filter disc 202.

[0037] The working process of the present utility model is as follows: when the needle valve of a diesel engine hole-type fuel injector is used to filter impurities during the fuel supply process, the fuel first enters the filter chamber 101, passes through the filter disc 202, flows downward through the gap between the needle valve body 201 and the needle valve body 1, enters the pressure chamber 102, and is finally sprayed out through the spray hole 103 to complete the fuel injection operation. During the process, the filter disc 202 can filter and block the tiny particles in the fuel, and at the same time, it can also prevent the tiny particles from flowing through the gap between the filter disc 202 and the inner wall of the needle valve body 1, preventing them from affecting the movement of the needle valve body 201, effectively improving the service life of the equipment, and during the up and down movement of the needle valve assembly 2, the friction between the needle valve body 201 and the needle valve body 1 can be reduced by the coordinated use of the first groove 203, the first ball 204, the second groove 206 and the second ball 207, thereby greatly improving the practicality.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A needle valve for a diesel engine hole-type fuel injection nozzle, comprising a needle valve body (1), characterized in that: The needle valve assembly (2) is slidably connected to the interior of the needle valve body (1); The needle valve assembly (2) comprises a needle valve body (201), the top end of the needle valve body (201) is sleeved with a filter disc (202), a plurality of first grooves (203) are provided around the periphery of the filter disc (202), the interior of the first groove (203) is rotatably connected with a first ball (204), and the first ball (204) can roll in contact with the needle valve body (1) inside the first groove (203) when the needle valve body (201) slides up and down, thereby reducing the friction between the filter disc (202) and the needle valve body (1), and a fixing column (205) is sleeved on the top end of the needle valve body (201) and located above the filter disc (202).

2. The needle valve of a diesel engine hole-type fuel injection nozzle according to claim 1, characterized in that: A filter chamber (101) is provided at the top of the needle valve body (1), a pressure chamber (102) is provided inside the needle valve body (1) and below the filter chamber (101), and a spray hole (103) is provided around the periphery of the needle valve body (1) near the bottom, and the filter chamber (101), the pressure chamber (102) and the spray hole (103) are connected.

3. The needle valve of a diesel engine hole-type fuel injection nozzle according to claim 1, characterized in that: The needle valve body (201) is made of a wear-resistant alloy material, and its bottom is a circular structure.

4. The needle valve for a diesel engine hole-type fuel injection nozzle according to claim 1, characterized in that: A plurality of second grooves (206) are equidistantly formed on the periphery of the needle valve body (201) from top to bottom, and a second ball (207) is rotatably connected inside the second groove (206).

5. The needle valve for a diesel engine hole-type fuel injector according to claim 1, characterized in that: The periphery of the needle valve body (201) and the area below the filter disc (202) and above the second ball (207) is a conical structure.

6. The needle valve for a diesel engine hole-type fuel injection nozzle according to claim 1, characterized in that: A 0.01-0.55 mm filter element is fixedly connected to the interior of the filter disc (202), and a gap between the periphery of the filter disc (202) and the inner wall of the needle valve body (1) is 0.01-0.55 mm.

7. The needle valve for a diesel engine hole-type fuel injector according to claim 1, characterized in that: Sealing rings are symmetrically provided on the periphery of the needle valve body (201) and at the top and bottom of the filter disc (202).

8. The needle valve for a diesel engine hole-type fuel injector according to claim 1, characterized in that: A slot (2051) is provided at the bottom of the fixing column (205), a threaded rod (2052) is welded inside the slot (2051), and the threaded rod (2052) is threadedly connected to the needle valve body (201).

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