Oil nozzle matching part
By disassembling the needle valve body and guide body of the fuel injector nozzle pair, and using technical means such as fasteners, limit rings, pins, clamping hoops and sealing rings, the result of integrated casting in the prior art is solved. The difficulty of production and inconvenience of maintenance have achieved more efficient assembly and more stable connections, improving product quality and environmental friendliness.
Patent Information
- Application Number
- CN202421134765.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing fuel injector nozzle pairs are made in one-piece casting during the manufacturing process, which increases production difficulty and cost, and is inconvenient during maintenance and replacement, affecting resource utilization and environmental protection.
The needle valve body and guide body are separated, and the production process is simplified and the cost is reduced through fasteners. The limit ring, pin and clamping are used to improve connection stability, and the sealing ring and channel are added to improve sealing and Easy to operate.
It reduces the production difficulty and cost of fuel injector nozzle pairs, improves assembly efficiency and product quality, enhances connection stability and sealing performance, and facilitates maintenance and replacement.
Smart Images
Figure CN222208131U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of fuel injection nozzles, and in particular to a fuel injection nozzle pair. Background Art
[0002] The fuel injection nozzle is a key component in the fuel injection system. It is a valve installed in the fuel chamber of a diesel engine to control the fuel inlet. Its function is to spray the fuel into the engine cylinder in the form of mist, and then mix it with the air to form a combustible mixture, thereby driving the engine to operate.
[0003] Existing fuel injection nozzle pairs generally include a needle valve body, a guide body, a needle valve and other parts. The needle valve body and the guide body are integrally connected, and the needle valve is movably connected in the needle valve body. The needle valve controls the opening and closing of the valve by moving up and down.
[0004] In view of the above-mentioned related technologies, during the manufacturing process of the fuel injection nozzle pair, the guide body and the needle valve body are usually made by integral casting. However, this integral casting method has high requirements on the casting process, which not only increases the production difficulty, but also leads to an increase in production costs. At the same time, the integrally cast fuel injection nozzle pair also has many inconveniences in maintenance and replacement, which is not conducive to the rational use of resources and environmental protection, and therefore needs to be improved. Utility Model Content
[0005] In order to reduce the difficulty of processing a fuel injector pair, the present application provides a fuel injector pair.
[0006] The fuel injection nozzle assembly provided in this application adopts the following technical solution:
[0007] A fuel injection nozzle pair includes a needle valve body, a guide body and a valve needle. The guide body and the needle valve body are separately arranged. The valve needle is movably arranged in the needle valve body and extends into the guide body. The needle valve body is provided with a mounting end that docks with the guide body. The guide body is provided with a mounting hole for a fastener to pass through. The guide body and the needle valve body are locked by a fastener.
[0008] By adopting the above technical solution, by setting the needle valve body and the guide body separately, when the fuel injector assembly needs to be assembled, the mounting end of the needle valve body is docked on the guide body, and then the fastener is passed through the mounting hole and the needle valve body is locked. The fastener is a detachable object, so that the entire fuel injector assembly structure is optimized. The guide body and the needle valve body are cast separately, which simplifies the production process, reduces the casting difficulty and production cost, and improves the assembly efficiency and product quality.
[0009] Preferably, one end of the guide body facing the needle valve body is connected to a limiting ring, the limiting ring forms a limiting groove, and the mounting end of the needle valve body is clamped in the limiting groove.
[0010] By adopting the above technical solution, during installation, the installation end of the needle valve body is first clamped in the limit groove, and then locked with a fastener, thereby improving the connection stability between the needle valve body and the guide body.
[0011] Preferably, a latch is connected to the mounting end of the needle valve body, the latch deviates from the central axis of the needle valve body, and a slot for the latch to be inserted is provided on the guide body.
[0012] By adopting the above technical solution, after the needle valve body and the guide body are aligned, the latch can be inserted into the slot to achieve pre-positioning of the needle valve body. Since the latch is arranged at an eccentric position of the needle valve body, the relative rotation of the needle valve body and the guide body can be well limited, which facilitates the subsequent locking of the fastener.
[0013] Preferably, it further comprises a clamp, wherein the clamp is arranged at a position where the needle valve body and the guide body are connected.
[0014] By adopting the above technical solution, after the needle valve body and the guide body are fixed by the fastener, the needle valve body and the guide body are further connected by the clamp, thereby improving the connection stability between the two. At the same time, the clamp is a detachable object and will not increase the difficulty of assembling the fuel injector pair.
[0015] Preferably, a plurality of mounting holes are provided, and the mounting holes are spaced apart along the circumference of the guide body.
[0016] By adopting the above technical solution, multiple mounting holes are provided for multiple fasteners to pass through, and multi-point connection is utilized to improve the firmness of the needle valve body and the guide body after installation.
[0017] Preferably, it also includes a sealing ring, the needle valve body is provided with a movable cavity for the valve needle to move, the guide body is provided with a yield cavity, the yield cavity is connected with the movable cavity and is used for the valve needle to pass through, the sealing ring is sleeved on the valve needle and is located in the yield cavity.
[0018] By adopting the above technical solution, the sealing ring can play a sealing role and reduce the possibility of diesel oil overflowing from the inside of the needle valve body.
[0019] Preferably, an oil inlet channel is provided on the guide body, one end of the oil inlet channel is connected to the valve needle, and the other end of the oil inlet channel is provided with an oil inlet.
[0020] By adopting the above technical solution, the staff can inject fuel into the oil inlet, and the fuel flows along the oil inlet channel to the position where the valve needle is located.
[0021] Preferably, the guide body is further provided with an oil unloading channel, one end of the oil unloading channel is communicated with the yield cavity, and the other end is provided with an oil unloading port.
[0022] By adopting the above technical solution, when the oil pressure inside the entire coupling is too high and becomes clogged, the oil can be unloaded through the oil unloading port, and the fuel can be extracted along the oil unloading channel.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] (1) By arranging the needle valve body and the guide body separately, the guide body and the needle valve body can be cast separately, thereby reducing the casting difficulty and production cost, and improving the assembly efficiency.
[0025] (2) By providing a limit ring, the mounting end of the needle valve body can be clamped in the limit groove during installation, and then locked using a fastener, thereby increasing the contact area between the needle valve body and the guide body to improve the connection stability between the two.
[0026] (3) By providing a clamp, the clamp further connects the needle valve body and the guide body together without affecting the difficulty of installing the needle valve body and the guide body, thereby further improving the connection stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a fuel injection nozzle pair in one embodiment of the present application;
[0028] Figure 2 It is an exploded schematic diagram of a fuel injection nozzle pair in one embodiment of the present application;
[0029] Figure 3 is a cross-sectional schematic diagram of the fuel injection nozzle assembly AA in one embodiment of the present application;
[0030] Figure 4 It is a schematic diagram of an explosion of a fuel injection nozzle pair in another embodiment of the present application.
[0031] Figure numerals: 1. needle valve body; 2. guide body; 3. valve needle; 4. limit ring; 5. limit groove; 6. mounting hole; 7. movable cavity; 8. give way cavity; 9. oil inlet channel; 10. oil unloading channel; 11. oil inlet port; 12. oil unloading port; 13. sealing ring; 14. pin; 15. slot. DETAILED DESCRIPTION
[0032] The technical solution of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.
[0033] In the description of the present application, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0036] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples shown in the present application.
[0037] The embodiment of the present application discloses a fuel injection nozzle pair. Figure 1 and Figure 2 The fuel injection nozzle pair includes a needle valve body 1, a guide body 2 and a valve needle 3 movably installed inside the needle valve body 1. The guide body 2 and the needle valve body 1 are separately arranged, and the needle valve body 1 is integrally connected with a mounting end that is connected to the guide body 2. The guide body 2 is integrally connected with a limiting ring 4 at one end facing the needle valve body 1, and a limiting groove 5 is formed between the limiting ring 4 and the guide body 2. The mounting end of the needle valve body 1 is clamped in the limiting groove 5, thereby increasing the contact area between the needle valve body 1 and the guide body 2. The guide body 2 is provided with a mounting hole 6 for the fastener to pass through, and the guide body 2 and the needle valve body 1 are locked together by the fastener. In this embodiment, the fastener is a detachable object, such as a fastening bolt. As shown in the figure, the number of mounting holes 6 in this embodiment is two, and the two mounting holes 6 are spaced apart on the guide body 2. Multiple mounting holes 6 are provided for multiple fasteners to pass through, so as to achieve multi-point connection and improve the firmness of the needle valve body 1 and the guide body 2 after installation.
[0038] By setting the needle valve body 1 and the guide body 2 separately, when the fuel injector assembly needs to be assembled, the mounting end of the needle valve body 1 is docked on the guide body 2, and then the fastener is passed through the mounting hole 6 to lock the needle valve body 1. Since the fastener can be removed, the entire fuel injector assembly structure is optimized. During manufacturing, the guide body 2 and the needle valve body 1 can be cast separately, which reduces the casting difficulty and production cost, and improves the assembly efficiency and product quality.
[0039] Reference Figure 2 and Figure 3 Specifically, a movable cavity 7 is provided inside the needle valve body 1 for the valve needle 3 to move, and one end of the valve needle 3 extends into the guide body 2. A clearance cavity 8 is provided on the guide body 2, and the clearance cavity 8 is connected with the movable cavity 7 and is used for the valve needle 3 to pass through. In addition, an oil inlet channel 9 and an oil unloading channel 10 are provided on the guide body 2, respectively. One end of the oil inlet channel 9 is connected with the valve needle 3, and the other end is provided with an oil inlet port 11, and the oil inlet port 11 is used for fuel to enter. The staff can inject fuel into the oil inlet port 11, so that the fuel flows along the oil inlet channel 9 to the position where the valve needle 3 is located. One end of the oil unloading channel 10 is connected with the clearance cavity 8, and the other end is provided with an oil unloading port 12, and the oil unloading port 12 is used for the extraction of fuel. When the oil pressure inside the entire pair is too high and blocked, the oil can be unloaded through the oil unloading port 12, and the fuel can be extracted along the oil unloading channel 10. The guide body 2 is also provided with a sealing ring 13, which is sleeved on the outer surface of the valve needle 3 and is located in the clearance cavity 8. The sealing ring 13 can play a sealing role to reduce the possibility of fuel overflowing from the inside of the needle valve body 1.
[0040] The implementation principle of the fuel injection nozzle assembly of the embodiment of the present application is as follows: when installing, first clamp the mounting end of the needle valve body 1 in the limit groove 5, and then use the fastener to pass through the mounting hole 6 and lock the needle valve body 1. In this way, the guide body 2 and the needle valve body 1 can be cast separately during the manufacturing process, simplifying the production process, reducing the difficulty of casting and production cost, and improving assembly efficiency.
[0041] In some embodiments, please refer to Figure 4, a latch 14 is also fixedly connected to the mounting end of the needle valve body 1, and the central axis of the latch 14 deviates from the central axis of the needle valve body 1, and a slot 15 for the latch 14 to be inserted is provided on the guide body 2. After the needle valve body 1 and the guide body 2 are aligned, the latch 14 can be inserted into the slot 15 first to achieve the pre-positioning of the needle valve body 1. Since the latch 14 is arranged at an eccentric position of the needle valve body 1, the relative rotation of the needle valve body 1 and the guide body 2 can be well limited, which facilitates the locking of the subsequent fasteners. At the same time, a clamp (not shown in the figure) is also installed at the position where the needle valve body 1 and the guide body 2 are connected to each other. The structure of the clamp belongs to the prior art and can be directly applied to this embodiment, and no further description is given here. After the fasteners fix the needle valve body 1 and the guide body 2, the clamp is further used to connect the needle valve body 1 and the guide body 2 to improve the connection stability between the two. At the same time, the clamp is a detachable object and will not increase the difficulty of assembling the fuel injector pair.
[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A fuel injection nozzle pair, characterized in that: The invention comprises a needle valve body (1), a guide body (2) and a valve needle (3), wherein the guide body (2) and the needle valve body (1) are arranged separately, the valve needle (3) is movably arranged in the needle valve body (1) and extends into the interior of the guide body (2), the needle valve body (1) is provided with a mounting end docking with the guide body (2), the guide body (2) is provided with a mounting hole (6) for a fastener to pass through, and the guide body (2) and the needle valve body (1) are locked by a fastener.
2. A fuel injection nozzle assembly according to claim 1, characterized in that: One end of the guide body (2) facing the needle valve body (1) is connected to a limit ring (4), the limit ring (4) forms a limit groove (5), and the mounting end of the needle valve body (1) is clamped in the limit groove (5).
3. A fuel injection nozzle assembly according to claim 2, characterized in that: A latch pin (14) is also connected to the mounting end of the needle valve body (1), the latch pin (14) is offset from the central axis of the needle valve body (1), and a slot (15) for the latch pin (14) to be inserted is provided on the guide body (2).
4. The fuel injection nozzle assembly according to claim 1, characterized in that: It also comprises a clamp, which is arranged at the position where the needle valve body (1) and the guide body (2) are connected.
5. The fuel injection nozzle assembly according to claim 1, characterized in that: A plurality of mounting holes (6) are provided, and the mounting holes (6) are spaced apart along the circumference of the guide body (2).
6. The fuel injection nozzle assembly according to claim 1, characterized in that: The needle valve body (1) further comprises a sealing ring (13); a movable cavity (7) for the valve needle (3) to move is provided inside the needle valve body (1); a clearance cavity (8) is provided on the guide body (2); the clearance cavity (8) is communicated with the movable cavity (7) and is used for the valve needle (3) to pass through; the sealing ring (13) is sleeved on the valve needle (3) and is located in the clearance cavity (8).
7. A fuel injection nozzle assembly according to claim 6, characterized in that: An oil inlet passage (9) is provided on the guide body (2); one end of the oil inlet passage (9) is connected to the valve needle (3), and the other end is provided with an oil inlet port (11).
8. The fuel injection nozzle assembly according to claim 6, characterized in that: The guide body (2) is also provided with an oil unloading channel (10), one end of the oil unloading channel (10) is in communication with the clearance cavity (8), and the other end is provided with an oil unloading port (12).