Electromagnetic valve type oil sprayer

Abstract

The utility model relates to the technical field of oil sprayers, in particular to an electromagnetic valve type oil sprayer. The electrode is installed on the shell, the main shaft is installed in the shell, an oil inlet assembly is installed at one end of the main shaft, a valve seat is installed at the other end of the main shaft, the main shaft is sleeved with an electromagnetic coil and a flux sleeve, a limiting pipe, a return spring and a valve element are sequentially installed in the main shaft from the oil inlet direction to the oil outlet direction, and a sealing steel ball is arranged between the valve element and the valve seat. A plurality of flow dividing holes are evenly distributed in the circumferential direction of the end, close to the sealing steel ball, of the valve element, and a plurality of flow expanding sections are evenly distributed in the circumferential direction of the sealing steel ball. After the prior art is improved, the oil outlet is smooth, and the oil outlet quantity is large.

Description

Technical Field

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

[0002] In the fuel supply system of modern automobiles and motorcycles, electromagnetic fuel injectors, as their core components, have gradually replaced traditional carburetors and mechanical fuel injectors with their high precision, high efficiency and intelligent control. Electromagnetic fuel injectors control the injection amount and injection time through electromagnets, providing precise fuel supply to the engine, playing a key role in improving fuel economy, reducing emissions and improving engine performance.

[0003] For example, a Chinese patent document with authorization number CN102102608B discloses a high-speed response solenoid valve injector for motorcycles, including a housing, a limit tube, an electromagnetic coil, a return spring, a valve core, a valve seat, a sealing steel ball, an injection orifice plate, and a magnetic sleeve. The housing is provided with a main shaft of an integral tubular structure, the inner hole of the small end of the main shaft is successively equipped with the limit tube and the return spring, the inner hole of the large end is successively equipped with the valve core and the valve seat, the small end and the large end of the main shaft are transitionally connected to form an integral whole at the matching point between the main shaft and the end face of the valve core; one end of the sealing steel ball in the above-mentioned injector can be against the valve seat, and the other end can be against the valve core. When the valve core overcomes the spring force and is sucked up after obtaining the electromagnetic force, the oil flows out of the valve core, which has a certain impact force on the sealing steel ball, so that the sealing steel ball cannot be quickly separated from the valve seat, resulting in poor oil flow and small oil flow.

[0004] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a solenoid valve type fuel injector in view of the deficiencies of the above-mentioned prior art, so as to solve the problem in the prior art that when the valve core overcomes the spring force and is sucked up after obtaining the electromagnetic force, the oil flows out from the valve core, which has a certain impact force on the sealing steel ball, so that the sealing steel ball cannot be quickly separated from the valve seat, resulting in poor oil flow and small oil flow.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solenoid valve type injector, comprising a shell, an electrode installed on the shell, and a main shaft installed in the shell, one end of the main shaft is installed with an oil inlet assembly, and the other end is installed with a valve seat, the main shaft outer sleeve is provided with an electromagnetic coil and a magnetic sleeve, and a limit tube, a return spring, and a valve core are installed in the main shaft in sequence from the oil inlet to the oil outlet direction, a sealing steel ball is provided between the valve core and the valve seat, and a plurality of diversion holes are evenly distributed circumferentially on one end of the valve core close to the sealing steel ball.

[0007] By adopting the above technical solution, when the valve core overcomes the spring force and is sucked up after obtaining the electromagnetic force, the oil can not only flow out from the valve core axially, but also flow out radially from the diversion hole, which can greatly reduce the axial impact force on the sealing steel ball. At the same time, it is easy to form a circular flow, making it easier to separate the sealing steel ball from the valve seat, so that the oil flow is smooth and the oil flow is large.

[0008] The above technical solution is further configured as follows: the sealing steel ball is evenly provided with a plurality of flow expansion sections in the circumferential direction.

[0009] By adopting the above technical solution, after increasing the expansion flow section in the circumferential direction of the sealing steel ball, more oil can pass through from the side, further improving the oil output and oil output speed.

[0010] The above technical solution is further configured as follows: a stepped annular groove is provided on the inner side surface of the valve seat, the stepped annular groove is connected to the conical groove, the center of the conical groove is connected to an oil outlet hole, and a limiting section is provided on the peripheral side surface of the stepped annular groove to cooperate with the expansion section to limit the sealing steel ball.

[0011] By adopting the above technical solution, the sealing steel ball is limited in a certain circumferential direction through the stepped annular groove, so that the sealing steel ball can be aligned more quickly and the closing operation can be completed when the valve core is reset; the limiting section can prevent the sealing steel ball from deflecting, causing the expansion section to be misaligned and affecting the sealing performance.

[0012] The above technical solution is further configured as follows: the oil inlet assembly includes an oil cap that is interference fit with the main shaft, an oil sealing ring that is sleeved on the outer circumference of the main shaft is provided between the oil cap and the housing, and an air sealing ring that can abut against the housing is sleeved on one end of the outer periphery of the main shaft near the valve seat.

[0013] By adopting the above technical solution, the oil cap is fixedly installed on the main shaft through interference fit, and the overall sealing performance is further improved by the oil sealing ring and the air sealing ring.

[0014] The beneficial effects achieved by the utility model are: smooth oil discharge and large oil discharge amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Figure 2 It is a cross-sectional view in an embodiment of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the valve core in the embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the sealing steel ball in the embodiment of the utility model;

[0019] Figure 5It is a structural schematic diagram of the valve seat in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1-5 As shown in the figure, a solenoid valve type fuel injector comprises a housing 1, an electrode 2 mounted on the housing 1, a main shaft 3 mounted in the housing 1, an oil cap 4 with interference fit with the main shaft 3 is mounted at one end of the main shaft 3, and a valve seat 5 is mounted at the other end, an electromagnetic coil 6 and a magnetic guide sleeve 7 are arranged on the outer sleeve of the main shaft 3, a limit tube 8, a return spring 9, and a valve core 10 are sequentially installed in the main shaft 3 from the oil inlet to the oil outlet direction, a sealing steel ball 11 is arranged between the valve core 10 and the valve seat 5, and a plurality of diversion holes are evenly distributed circumferentially at one end of the valve core 10 close to the sealing steel ball 11 100, a plurality of expansion sections 111 are evenly distributed around the sealing steel ball 11, a stepped annular groove 51 is provided on the inner side surface of the valve seat 5, the stepped annular groove 51 is connected to the conical groove 52, the center of the conical groove 52 is connected to the oil outlet 50, and a limiting section 511 is provided on the circumferential side surface of the stepped annular groove 51 for cooperating with the expansion section 111 to limit the sealing steel ball 11, an oil sealing ring 12 is provided between the oil cap 4 and the housing 1 and is sleeved on the outer periphery of the main shaft 3, and a gas sealing ring 13 that can abut against the housing 1 is sleeved on the outer periphery of the main shaft 3 near the valve seat 5.

[0022] In the above embodiment, when the valve core 10 overcomes the spring force and is sucked up after obtaining the electromagnetic force, the oil can not only flow out axially from the valve core 10, but also flow out radially from the diverter hole 100, which can greatly reduce the axial impact force on the sealing steel ball 11. At the same time, it is easy to form a ring flow, so that the sealing steel ball 11 is more easily separated from the conical groove 52 of the valve seat 5, so that the oil flow is smooth and the oil flow is large; after the expansion section 111 is added circumferentially to the sealing steel ball 11, more oil can pass through from the side, further improving the oil flow and the oil flow speed.

Claims

1. A solenoid valve type fuel injector, comprising a housing, an electrode mounted on the housing, and a main shaft mounted in the housing, wherein an oil inlet assembly is mounted at one end of the main shaft and a valve seat is mounted at the other end, an electromagnetic coil and a magnetic conductive sleeve are mounted on the main shaft outer sleeve, a limit tube, a return spring, and a valve core are mounted in the main shaft in sequence from the oil inlet to the oil outlet, and a sealing steel ball is arranged between the valve core and the valve seat, characterized in that: A plurality of diversion holes are evenly distributed in the circumferential direction on one end of the valve core close to the sealing steel ball.

2. The solenoid valve fuel injector according to claim 1, characterized in that: The sealing steel ball is evenly provided with a plurality of flow expansion sections in the circumferential direction.

3. The solenoid valve fuel injector according to claim 2, characterized in that: A stepped annular groove is provided on the inner side surface of the valve seat, the stepped annular groove is connected to the conical groove, the center of the conical groove is connected to an oil outlet hole, and a limiting section is provided on the peripheral side surface of the stepped annular groove to cooperate with the expansion section to limit the sealing steel ball.

4. A solenoid valve fuel injector according to any one of claims 1 to 3, characterized in that: The oil inlet assembly includes an oil cap with interference fit on the main shaft, an oil sealing ring sleeved on the outer circumference of the main shaft is arranged between the oil cap and the housing, and an air sealing ring capable of abutting against the housing is sleeved on one end of the outer circumference of the main shaft close to the valve seat.

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