Pressure regulating valve

Abstract

The utility model relates to a pressure regulating valve, which comprises a pole shoe (1), and is characterized in that an oil inlet hole at the bottom of the pole shoe (1) is communicated with a cavity at the upper part of the pole shoe (1), a conical oil hole of a valve seat (2) positioned in the cavity of the pole shoe (1) is communicated with an oil inlet hole of the pole shoe (1), a ball body (14) is pressed in the conical oil hole of the valve seat (2) by an armature (3) penetrating through a valve core (4), and an electromagnet assembly (6) is embedded in an inner sleeve (7). The inner sleeve (6) is connected to the pole shoe (1) in a press fit mode through the outer sleeve (7), and the top of a spring (15) located in a center through hole of the electromagnet assembly (6) acts on the top of the armature (3). The pressure regulating valve is convenient to machine and beneficial to miniaturization application.

Description

Technical Field

[0001] This utility model relates to a pressure regulating valve, and more particularly to a pressure regulating valve in a diesel engine electronically controlled common rail system, belonging to the field of solenoid valve technology. Background Technology

[0002] Currently, electromagnetically based pressure regulating valves are crucial actuators in diesel engine common rail systems. Under different engine operating conditions, they precisely adjust the fuel pressure in the common rail in real time according to instructions from the electronic control unit (ECU), ensuring that fuel is injected into the engine cylinders at the appropriate pressure to meet engine demands and achieve efficient combustion. Conventional pressure regulating valve structures, such as the one disclosed by Bosch in Chinese patent CN200910249091.1 "Pressure Regulating Valve," employ a bottom-in, side-out design. While simple in structure, the entire pole shoe is machined as a single piece, resulting in high machining requirements. Furthermore, the excessively long armature requires precise concentricity machining, further complicating overall processing. Additionally, the original bottom-in, side-out design hinders miniaturization. Therefore, a bottom-in, top-out pressure regulating valve, conducive to miniaturization, is being developed. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a pressure regulating valve that is easy to process and conducive to miniaturization.

[0004] The purpose of this utility model is achieved as follows:

[0005] A pressure regulating valve includes a pole shoe, an oil inlet at the bottom of the pole shoe that connects to a chamber at its upper part, an oil inlet at the pole shoe that is connected to a conical oil hole in a valve seat located in the pole shoe chamber, an armature passing through a valve core pressing a ball into the conical oil hole in the valve seat, an electromagnet assembly embedded in an inner sleeve, an outer sleeve pressing the inner sleeve onto the pole shoe, and the top of a spring located in the central through hole of the electromagnet assembly acting on the top of the armature.

[0006] Preferably, a guide cylinder is embedded in the central through hole of the electromagnet assembly, the spring is located inside the guide cylinder, and a spring seat is fitted onto the top of the spring and located inside the guide cylinder.

[0007] Preferably, the guide cylinder has multiple balance oil holes on one end extending outside the electromagnet assembly.

[0008] Preferably, the inner wall of the outer sleeve and the outer wall of the inner sleeve are connected by a stepped surface fit, and the lower inner wall of the outer sleeve is screwed onto the outer wall of the pole shoe.

[0009] Preferably, a pressure cap presses the electromagnet assembly into the inner sleeve, and the central through hole of the pressure cap is connected to the center of the electromagnet assembly.

[0010] Preferably, the lead wire of the electromagnet assembly protruding from the gland is injection molded into a connector that wraps around the outer wall of the gland.

[0011] Preferably, the valve core is provided with an oil hole.

[0012] Preferably, the oil hole is composed of interconnected vertical channels and oblique channels. The vertical channels are connected to the chamber of the pole shoe, and the oblique channels are connected to the inner chamber formed by the valve seat and the valve core to accommodate the ball.

[0013] Preferably, the armature has a T-shaped structure, with a gasket placed between the T-shaped head of the armature and the valve core, and both the gasket and the T-shaped head of the armature have through holes arranged vertically.

[0014] Preferably, a filter screen for filtering oil is installed in the oil inlet at the bottom of the pole shoe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention redesigns the entire valve through a split component structure, which not only reduces the processing difficulty of each component but also simplifies assembly. At the same time, it allows oil to enter from the bottom and exit from the top, which is beneficial for its application in miniaturized applications and has a wider range of application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pressure regulating valve according to the present invention.

[0018] Figure 2 This is a schematic diagram of the valve core in this utility model.

[0019] Figure 3 This is a schematic diagram of the gasket structure in this utility model.

[0020] in:

[0021] 1. Pole shoe; 2. Valve seat; 3. Armature; 4. Valve core; 5. Gasket; 6. Electromagnet assembly; 7. Inner sleeve; 8. Guide cylinder; 9. Spring seat; 10. Pressure cap; 11. Outer sleeve; 12. Connector; 13. Filter screen; 14. Ball; 15. Spring; 16. Connector snap ring.

[0022] Oil hole 4.1. Detailed Implementation

[0023] See Figures 1-3This utility model relates to a pressure regulating valve, comprising a pole shoe 1, with an oil inlet at the bottom of the pole shoe 1 connected to a chamber at its upper part, a valve seat 2 fixed in the chamber of the pole shoe 1, and a conical oil hole of the valve seat 2 connected to the oil inlet of the pole shoe 1, a ball 14 placed in the conical oil hole of the valve seat 2, a valve core 4 also located in the chamber of the pole shoe 1, and the valve core 4 pressed against the valve seat 2, an armature 3 passing through the valve core 4 and pressed against the ball 14, and the valve core 4 is provided with There is an oil hole 4.1, which is composed of interconnected vertical and oblique channels. The vertical channel is connected to the chamber of the pole shoe 1, and the oblique channel is connected to the inner chamber formed by the valve seat 2 and the valve core 4 to accommodate the ball 14. Preferably, the armature 3 is a T-shaped structure, and a gasket 5 is placed between the T-shaped head of the armature 3 and the valve core 4. Both the gasket 5 and the T-shaped head of the armature 3 are provided with through holes in the vertical direction so that the oil can pass smoothly upward.

[0024] The electromagnet assembly 6 is embedded in the inner sleeve 7, and the spring 15 is located in the central through hole of the electromagnet assembly 6. Preferably, a guide cylinder 8 is embedded in the central through hole of the electromagnet assembly 6, the spring 15 is located in the guide cylinder 8, and a spring seat 9 is fitted on the top of the spring 15 and located in the guide cylinder 8. After the pressure cap 10 presses the electromagnet assembly 6 into the inner sleeve 7, the inner sleeve 7 is connected to the pole shoe 1 through the outer sleeve 11. The central through hole of the pressure cap 10 is connected to the center of the electromagnet assembly 6. At this time, the inner wall of the outer sleeve 11 and the outer wall of the inner sleeve 7 are engaged through the stepped surface to prevent the inner sleeve 7 from coming off upward. The lower inner wall of the outer sleeve 11 is provided with internal threads, and the outer wall of the pole shoe 1 is provided with external threads. Thus, the outer sleeve 11 is screwed onto the pole shoe 1 through the threaded engagement, thereby achieving quick assembly. Subsequently, the lead wires of the coil assembly of the electromagnet assembly 6 are connected to the upper terminal after passing through the cover 10, and then injection molding is used to form the plug 12 wrapped on the outer wall of the cover 10.

[0025] In use, a filter screen 13 is installed in the oil inlet at the bottom of the pole shoe 1 to filter the oil. The oil pipe can be quickly connected by the connecting spring 16 on the pressure cap 10. When the electromagnet assembly 6 is not energized, the armature 3 is lowered by the force of the spring 15 and the ball 14 is pressed into the conical oil hole of the valve seat 2 to achieve the closing operation.

[0026] When the electromagnet assembly 6 is energized, it attracts the armature 3 upwards, overcoming the spring 15. At this time, the ball 14, pushed upwards by the oil, opens the conical oil hole on the valve seat 2, allowing the oil to flow upwards through the oil hole 4.1 of the valve core 4, and then through the guide cylinder 8 and the central through hole of the pressure cap 10 before flowing into the oil pipe. Subsequently, when the electromagnet assembly 6 is de-energized again and the oil port needs to be closed, the presence of the oblique channel of the oil hole 4.1 allows the oil in the conical oil hole of the valve seat 2 to be quickly discharged into the chamber of the pole shoe 1, so as to prevent residual oil from delaying the movement of the armature 3 and affecting the response characteristic curve.

[0027] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A pressure regulating valve comprising a pole piece (1), characterized in that: The oil inlet at the bottom of the pole shoe (1) is connected to the upper chamber. The oil inlet of the pole shoe (1) is connected to the conical oil hole of the valve seat (2) in the chamber of the pole shoe (1). The armature (3) passing through the valve core (4) presses the ball (14) into the conical oil hole of the valve seat (2). The electromagnet assembly (6) is embedded in the inner sleeve (7). The outer sleeve (11) presses the inner sleeve (7) onto the pole shoe (1). The top of the spring (15) located in the central through hole of the electromagnet assembly (6) acts on the top of the armature (3).

2. The pressure regulating valve according to claim 1, characterized in that: A guide tube (8) is embedded in the central through hole of the electromagnet assembly (6), the spring (15) is located inside the guide tube (8), and a spring seat (9) is fitted on the top of the spring (15) and located inside the guide tube (8).

3. The pressure regulating valve according to claim 2, characterized in that: The guide cylinder (8) has multiple balance oil holes on one end that extends outside the electromagnet assembly (6).

4. A pressure regulating valve according to claim 1, characterized in that: The inner wall of the outer sleeve (11) and the outer wall of the inner sleeve (7) are connected by a stepped surface fit, and the lower inner wall of the outer sleeve (11) is screwed onto the outer wall of the pole shoe (1).

5. A pressure regulating valve according to claim 1, characterized in that: A pressure cap (10) presses the electromagnet assembly (6) into the inner sleeve (7), and the central through hole of the pressure cap (10) is connected to the center of the electromagnet assembly (6).

6. A pressure regulating valve according to claim 1, characterized in that: The lead wire of the electromagnet assembly (6) is injection molded to form a connector (12) wrapped around the outer wall of the pressure cover (10).

7. A pressure regulating valve according to claim 1, characterized in that: The valve core (4) is provided with an oil hole (4.1).

8. A pressure regulating valve according to claim 7, characterized in that: The oil hole (4.1) is composed of interconnected vertical and oblique channels. The vertical channel is connected to the chamber of the pole shoe (1), and the oblique channel is connected to the valve seat (2) and valve core (4) to form the inner chamber that accommodates the ball (14).

9. A pressure regulating valve according to claim 1, characterized in that: The armature (3) is a T-shaped structure with a gasket (5) placed between the T-shaped head of the armature (3) and the valve core (4). Both the gasket (5) and the T-shaped head of the armature (3) are provided with through holes in a vertical direction.

10. A pressure regulating valve according to claim 1, characterized in that: A filter screen (13) for filtering oil is installed in the oil inlet at the bottom of the pole shoe (1).

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