Multipurpose oil sprayer valve element

Abstract

The utility model relates to a multipurpose oil sprayer valve element. The multipurpose oil sprayer valve element comprises a connecting section and a transition section integrally machined and formed with the connecting section. A fixing hole is formed in the connecting section, a center hole is formed coaxially with the fixing hole, an oil channel coaxial with the center hole is formed in the transition section, a mounting ring is arranged on the outer surface of the connecting section, and the diameter of the mounting ring is larger than that of the connecting section. The axial length of the mounting ring is smaller than that of the connecting section. Through the design of the mounting ring, an armature or a spring can be fixed to the mounting ring, or the mounting ring is in sliding connection with a shell of the oil injector, the contact area of the valve element and the shell of the oil injector is reduced, and then the friction force is reduced; according to different effects achieved by different installation environments, the center hole is formed between the fixing hole and the oil channel, the centering effect is achieved when the oil pipe is installed, and the coaxiality between the oil pipe and the valve element is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injectors, in particular to a multi-purpose fuel injector valve core. Background Art

[0002] The function of the fuel injector is to change a certain amount of fuel from liquid to mist, and then mix it with air. The electronically controlled fuel injector includes axle needle type electromagnetic fuel injector, ball valve type electromagnetic fuel injector, plate valve type electromagnetic fuel injector, etc. The ball valve type electromagnetic fuel injector usually includes a valve body, a coil, a spring, a needle valve, a valve seat, a spray hole plate, etc. The needle valve is made of a steel ball, a valve core and an armature welded into a whole by a laser beam. When the coil is energized, a magnetic force is generated. The needle valve moves under the action of the magnetic force, and the steel ball on the needle valve separates from the valve seat, so that the high-pressure fuel is sprayed out through the spray hole plate on the valve seat. When the coil is powered off, the magnetic force disappears, and the needle valve moves under the action of the spring, so that the steel ball on the needle valve abuts against the valve seat. The high-pressure fuel cannot be sprayed out through the spray hole plate on the valve seat. Because the needle valve is moving, the valve core and the valve body need to be slidably connected. Ensure the stability of the needle valve during the movement process. The existing valve core is usually made of a connecting section and a transition section, and the armature is fixed on the connecting section. The axial length of the armature is smaller than the axial length of the connecting section. After the armature is fixed on the connecting section, the remaining connecting section is in sliding contact with the valve body, resulting in an excessively long contact area between the connecting section and the valve body, resulting in a large friction between the valve core and the valve body, and a large resistance coil is required to drive the valve core to move. Utility Model Content

[0003] The utility model aims to provide a multi-purpose fuel injector valve core to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-purpose injector valve core, including a connecting section and a transition section integrally processed and formed with the connecting section; a fixing hole is arranged inside the connecting section and a center hole is arranged coaxially with the fixing hole, an oil channel is arranged coaxially with the center hole on the transition section, a mounting ring is arranged on the outer surface of the connecting section, and the diameter of the mounting ring is larger than the diameter of the connecting section; the axial length of the mounting ring is smaller than the axial length of the connecting section.

[0005] Compared with the prior art, the design of the mounting ring can fix the armature or spring on the mounting ring, or the mounting ring can be slidably connected to the housing of the injector, thereby reducing the contact area between the valve core and the injector housing, thereby reducing the effect of friction; the role played is different according to different installation environments, and a center hole is set between the fixing hole and the oil channel to play a centering role when installing the oil pipe to ensure the coaxiality between the oil pipe and the valve core.

[0006] The utility model is an improvement on the valve core of a multi-purpose fuel injector. Guide surfaces are arranged between the two ends of a mounting ring and a connecting section.

[0007] The utility model is an improvement on the valve core of a multi-purpose fuel injector. A conical sealing groove coaxially arranged with a central hole is arranged in a connecting section, and the sealing groove is located between the central hole and the oil passage.

[0008] The utility model provides an improvement on the valve core of a multi-purpose fuel injector, wherein the diameter of the transition section is smaller than the diameter of the connecting section.

[0009] The utility model provides an improvement on the valve core of a multi-purpose fuel injector, wherein the diameter of the oil passage is smaller than the diameter of the center hole.

[0010] The utility model is an improvement on the valve core of a multi-purpose fuel injector. Two connecting holes which are connected to oil passages are fixedly arranged on the transition section. The two oil passages are symmetrically arranged on the transition section.

[0011] The utility model provides an improvement on the valve core of a multi-purpose fuel injector, wherein the axis of the connecting hole and the axis of the oil passage are arranged perpendicularly to each other.

[0012] The utility model is an improvement on the valve core of a multi-purpose fuel injector. A spherical accommodating hole is arranged at the end of a transition section, and the accommodating hole is arranged coaxially with an oil passage.

[0013] The utility model provides an improvement on the valve core of a multi-purpose fuel injector. The connection between the accommodating hole and the oil channel is transitionally connected via an arc segment.

[0014] The utility model provides an improvement on the valve core of a multi-purpose fuel injector. An inclined surface is arranged on the outer surface of the end of the transition section, and the inclined surface is adjacent to the accommodating hole.

[0015] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the advantages brought by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model.

[0017] Figure 2 It is an enlarged view of point A of the present utility model.

[0018] Figure 3 It is an enlarged view of B of the present utility model.

[0019] Description of the reference numerals: 01. Connecting section, 02. Transition section, 03. Fixing hole, 04. Center hole, 05. Oil passage, 06. Sealing groove, 07. Mounting ring, 08. Guide surface, 09. Connecting hole, 10. Accommodating hole, 11. Arc section, 12. Inclined surface. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-3 As shown, a multi-purpose injector valve core of the utility model is connected to a steel ball at one end and to an armature at the other end. The steel ball, the valve core and the armature are welded into a whole by a laser beam, and include a connecting section 01 and a transition section 02 integrally formed with the connecting section 01. The diameter of the transition section 02 is smaller than the diameter of the connecting section 01, so that a chamber for accommodating fuel (gasoline / diesel) is formed between the outer circumferential surface of the transition section 02 and the injector housing. A fixing hole 03 is arranged inside the connecting section 01, and a center hole 04 is arranged coaxially with the fixing hole 03. When installing the oil pipe in the fixing hole 03, one end of the oil pipe is inserted into the center hole 04, and the oil pipe is preliminarily positioned through the center hole 04, so that the axis of the oil pipe coincides with the axis of the connecting section 01. The coaxiality of the oil pipe and the valve core is ensured when they are fixedly connected. This prevents the oil pipe from scratching the injector housing in the process of following the movement of the valve core. An oil passage 05 coaxially arranged with the center hole 04 is provided on the transition section 02 , and the diameter of the oil passage 05 is smaller than the diameter of the center hole 04 . Meanwhile, a conical sealing groove 06 coaxially arranged with the center hole 04 is provided in the connecting section 01 , and the sealing groove 06 is located between the center hole 04 and the oil passage 05 .

[0022] During use, the connecting section 01 needs to be fixedly connected with the hollow armature by laser beam welding, and the oil pipe is passed through the step hole, and then the electromagnetic coil in the injector cooperates with the armature. The entire valve core is driven to move back and forth in the injector, so a conical sealing groove 06 is set at the bottom of the center hole 04. At the same time, a conical sealing ring is set in the conical sealing groove 06. The conical sealing ring is sleeved on the oil pipe. Since the diameter of the oil channel 05 is smaller than the diameter of the center hole 04, a mounting surface is formed at the connection between the oil channel 05 and the center hole 04. After the conical sealing ring is installed in the conical sealing groove 06, the conical sealing ring is abutted against the mounting surface, so that the conical sealing ring is clamped in the conical sealing groove 06. The setting of the conical sealing ring prevents fuel (gasoline / diesel) from entering the gap between the oil pipe and the center hole 04 to damage the armature. Thereby improving the service life of the armature. At the same time, a conical sealing ring is installed in the conical sealing groove 06. Compared with the flat seal ring, the conical seal ring has a higher pressure bearing capacity and a better sealing effect. From the perspective of the processing tool, the tool (inner groove tool) used to process the flat seal groove 06 in the center hole 04 and the tool (inner boring tool) used to process the conical seal groove 06 in the center hole 04 are more expensive. From the perspective of the processing path, the route of the inner boring tool when processing the conical seal groove 06 is an oblique line. When processing the flat seal groove 06, the route of the inner groove tool is a reciprocating straight line. Therefore, the route of the inner boring tool and the time required for processing the conical seal groove 06 are shorter.

[0023] like Figure 2 As shown, a mounting ring 07 is provided on the outer surface of the connecting section 01. The diameter of the mounting ring 07 is larger than the diameter of the connecting section 01 and is integrally formed with the connecting section 01. A guide surface 08 is provided between the connecting sections 01 at both ends of the mounting ring 07. The mounting ring 07 and the connecting section 01 are fixedly connected as a whole through the guide surface 08.

[0024] When the armature is fixedly connected to the mounting ring 07 on the connecting section 01, since both ends of the mounting ring 07 are provided with guide surfaces 08, one of the guide surfaces 08 forms a weld between the mounting ring 07 and the armature, and at the same time provides a guide when installing the armature, providing a better welding position for subsequent laser beam welding.

[0025] When the armature is fixedly connected to the connecting section 01 and the armature is located between the mounting ring 07 and the transition section 02, a spring needs to be arranged between the connecting section 01 and the iron core of the electromagnetic coil during the assembly process. During the installation of the spring, the spring can be sleeved on the mounting ring 07. This ensures that the spring is coaxial with the connecting section 01 during use, thereby ensuring that the spring is subjected to balanced force during operation.

[0026] When the armature is fixedly connected to the end of the connecting section 01 by laser beam welding, the armature cooperates with the electromagnetic coil to make the valve core move up and down in the housing of the fuel injector during use, so the mounting ring 07 is set. During the movement, the mounting ring 07 is brought into contact with the housing of the fuel injector. Since the axial length of the mounting ring 07 is less than the axial length of the connecting section 01, the contact area between the valve core and the housing of the fuel injector is reduced, thereby reducing the friction.

[0027] Therefore, through the design of the mounting ring, the armature or spring can be fixed on the mounting ring, or the mounting ring can be slidably connected with the housing of the injector to reduce the contact area between the valve core and the housing of the injector, thereby reducing the effect of friction. The role played by different installation environments is different.

[0028] like Figure 3 As shown, two connecting holes 09 are fixedly provided on the transition section 02 and are connected to the oil passage 05. The two connecting holes 09 are symmetrically arranged on the transition section 02. The design of the connecting holes 09 facilitates the fuel (gasoline / diesel) to flow out of the oil passage 05 or allows the fuel (gasoline / diesel) outside the transition section 02 to enter the oil passage 05 through the connecting holes 09. The axis of the connecting hole 09 and the axis of the oil passage 05 are arranged perpendicular to each other. A spherical receiving hole 10 is provided at the end of the transition section 02, and the receiving hole 10 is arranged coaxially with the oil passage 05. The connection between the receiving hole 10 and the oil passage 05 is transitionally connected by a circular arc segment 11. An inclined surface 12 is provided on the outer surface of the end of the transition section 02, and the inclined surface 12 is adjacent to the receiving hole 10. The design of the inclined surface 12 reduces the thickness from the outer edge of the transition section 02 to the receiving hole 10.

[0029] During use, it is necessary to place a steel ball in the receiving hole 10, and fix the steel ball and the transition section 02 as a whole by laser beam welding. Since the receiving hole 10 is spherical. Placing the steel ball in the receiving hole 10 makes the steel ball fit more closely with the receiving hole 10, and it is convenient to place the steel ball. A bevel is provided on the outer surface of the transition section 02, and the connection between the weld produced during the laser beam welding and the transition section 02 is smoother. Therefore, during use, it is avoided that the fuel (gasoline / diesel) flows through the step between the steel ball and the transition section 02 and becomes mixed and disordered. Thereby increasing the flow rate of the fuel. When adding the inclined surface 12, the receiving hole 10 is first processed, and then the size of the weld at the welding point between the steel ball and the end face of the transition section 02 is determined. The inclination angle of the bevel and the length of the inclined surface 12 along the axis direction of the transition section 02 are determined.

[0030] At the same time, the arc segment 11 is passed through the connection between the receiving hole 10 and the oil passage 05. The design of the arc segment 11 and the design of the inclined surface 12 are used to prevent the fuel (gasoline / diesel) from being mixed and disordered in the oil passage 05.

[0031] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-purpose fuel injector valve core, comprising a connecting section and a transition section integrally formed with the connecting section; characterized in that: A fixing hole and a center hole coaxially arranged with the fixing hole are arranged in the connecting section, an oil channel coaxially arranged with the center hole is arranged on the transition section, and a mounting ring is arranged on the outer surface of the connecting section, and the diameter of the mounting ring is larger than the diameter of the connecting section; the axial length of the mounting ring is smaller than the axial length of the connecting section.

2. The multi-purpose fuel injector valve core according to claim 1, characterized in that: Guide surfaces are arranged between the two ends of the mounting ring and the connecting section.

3. The multi-purpose fuel injector valve core according to claim 1, characterized in that: A conical sealing groove coaxially arranged with the central hole is arranged in the connecting section, and the sealing groove is located between the central hole and the oil passage.

4. The multi-purpose fuel injector valve core according to claim 3, characterized in that: The diameter of the transition section is smaller than the diameter of the connecting section.

5. The multi-purpose fuel injector valve core according to claim 4, characterized in that: The diameter of the oil passage is smaller than the diameter of the center hole.

6. The multi-purpose fuel injector valve core according to claim 1, characterized in that: Two connecting holes which are connected to the oil passages are fixedly arranged on the transition section, and the two oil passages are symmetrically arranged on the transition section.

7. The multi-purpose fuel injector valve core according to claim 6, characterized in that: The axis of the connecting hole and the axis of the oil channel are arranged perpendicular to each other.

8. The multi-purpose fuel injector valve core according to claim 7, characterized in that: A spherical receiving hole is arranged at the end of the transition section, and the receiving hole is arranged coaxially with the oil passage.

9. The multi-purpose fuel injector valve core according to claim 8, characterized in that: The connection between the receiving hole and the oil channel is connected by a circular arc segment transition.

10. The multi-purpose fuel injector valve core according to claim 9, characterized in that: An inclined surface is arranged on the outer surface of the end of the transition section, and the inclined surface is adjacent to the accommodating hole.

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