Disc type electromagnet for electromagnetic valve and coil assembly

Abstract

The utility model relates to the technical field of disc type electromagnets for electromagnetic valves, and particularly discloses a disc type electromagnet for an electromagnetic valve and a coil assembly. The inner wall of one end of the outer magnetic pole is welded with an inner magnetic pole through a stainless steel magnetism isolating ring; the other end of the outer magnetic pole is provided with a coil cover. The magnetic poles of the disc-type electromagnet are welded through the non-magnetic stainless steel magnetism isolating rings, magnetic circuits in the magnetic poles are reasonably arranged, the high-pressure sealing check ring combined structure is adopted outside the electromagnet, so that adjacent openings of the valve and the electromagnet can bear high pressure, and the requirements that an outlet can bear high pressure and oil flows in two directions are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to disc type electromagnet for electromagnetic valve technical field, especially disc type electromagnet for electromagnetic valve and coil assembly. BACKGROUND

[0002] In recent years with the progress of science and technology, a kind of digital hydraulic technology based on high-speed on-off valve high-speed on-off control to fluid is being developed rapidly, the demand for this key basic component high-speed on-off valve, especially large flow on-off valve is very urgent.

[0003] High-pressure large-flow high-speed on-off valve puts forward the requirement of big thrust, fast response and bidirectional flow to its driving part, disc type electromagnet is widely used in the field of engine fuel injection system and compressor variable displacement control because the electromagnetic force generated within a certain stroke is relatively large, but the disc type electromagnet in the above application is in low-pressure environment, and the electromagnet is packaged by injection molding, cannot be used in industrial control and engineering machinery fields requiring the inlet and outlet of valve can withstand high pressure, and cannot meet the requirement of bidirectional flow. SUMMARY

[0004] The utility model provides a disc type electromagnet for electromagnetic valve and coil assembly aims at solving the problem that the on-off valve using prior disc type electromagnet (encapsulated by injection molding) mentioned in background art cannot withstand high pressure and cannot flow bidirectionally.

[0005] The utility model adopts the following technical scheme to realize the invention purpose:

[0006] A disc type electromagnet for electromagnetic valve, comprising an outer magnetic pole, an inner magnetic pole is welded to the inner wall of one end of the outer magnetic pole through a stainless steel magnetic isolation ring.

[0007] A coil assembly for electromagnetic valve, comprising an outer magnetic pole, an inner magnetic pole is welded to the inner wall of one end of the outer magnetic pole through a stainless steel magnetic isolation ring, and a coil cover is arranged at the other end of the outer magnetic pole.

[0008] In the foregoing disc type electromagnet for electromagnetic valve and coil assembly, a coil holder is arranged between the outer magnetic pole, the stainless steel magnetic isolation ring, the inner magnetic pole and the coil cover, a coil is arranged on the coil holder, and a pouring member is arranged between the coil and the outer magnetic pole.

[0009] In the foregoing disc type electromagnet for electromagnetic valve and coil assembly, a groove is arranged on the outer wall of the outer magnetic pole, and a sealing check ring assembly is arranged in the groove.

[0010] In the foregoing disc type electromagnet for electromagnetic valve and coil assembly, the sealing check ring assembly comprises an O-shaped ring and a check ring arranged side by side.

[0011] In the foregoing disc type electromagnet for electromagnetic valve and coil assembly, the check ring is arranged close to the coil cover.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] 1, the utility model discloses a non -magnetic stainless steel magnetic pole between the magnetic pole of disc -type electromagnet is welded with magnetic ring, and the magnetic circuit in the magnetic pole is reasonably arranged, and the high -pressure sealing baffle ring combination structure is used to the outside of electromagnet, so that the valve can bear high pressure with the adjacent mouth of electromagnet, satisfies the requirement that the export can also bear high pressure and bidirectional oil flow.

[0014] 2, the valve flow of two -way double -way electromagnetic valve of the utility model can reach 40L / min (under 1MPa pressure difference), and response time reaches below 5ms;Can flow bidirectionally and can bear above 35MPa high pressure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the utility model (the arrow in the figure indicates the welding position);

[0016] Figure 2 It is the structure schematic diagram of the utility model embodiment 2;

[0017] Figure 3 It is the valve core structure schematic diagram of the utility model embodiment 2;

[0018] Figure 4 It is the working state schematic diagram of the utility model embodiment 2.

[0019] Figure 5 It is the structure schematic diagram of the utility model embodiment 3;

[0020] Figure 6 It is the valve core structure schematic diagram of the utility model embodiment 3;

[0021] Figure 7 It is the working state schematic diagram of the utility model embodiment 3.

[0022] The marks in the drawing are: electric connector 1, O -ring 2, sealing screw nut 3, shell 4, coil assembly 5, washer 6, armature 7, spring 8, spring seat 9, baffle ring 10, valve core 11, valve body 12, sealing pad 13, sealing seat 14, locking nut 15, gasket 16, stop seat 17;Inner magnetic pole 51, magnetic ring 52, outer magnetic pole 53, coil 54, coil holder 55, perfusion 56, coil cover 57. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0024] Embodiment 1. A coil assembly for an electromagnetic valve, as shown in Figure 1 which comprises a disc type electromagnet, the disc type electromagnet comprising an outer magnetic pole 53, one end of the outer magnetic pole 53 being welded to an inner magnetic pole 51 through a stainless steel magnetic shunt ring 52, and the other end of the outer magnetic pole 53 being provided with a coil cover 57.

[0025] A coil holder 55 is arranged between the outer magnetic pole 53, the stainless steel magnetic shunt ring 52, the inner magnetic pole 51 and the coil cover 57, and a coil 54 is arranged on the coil holder 55, and a pouring member 56 is arranged between the coil 54 and the outer magnetic pole 53.

[0026] A groove is arranged on the outer wall of the outer magnetic pole 53, and a sealing retainer ring assembly is arranged in the groove, the sealing retainer ring assembly comprising an O-ring 2 and a retainer ring 10 arranged side by side.

[0027] The retainer ring 10 is arranged close to the coil cover 57.

[0028] In the coil assembly, the existing injection molded disc type electromagnet which can only be used in low pressure environment is improved to the disc type electromagnet which can withstand high pressure as described above. In the coil assembly, the non-magnetic stainless steel magnetic shunt ring is used to reasonably arrange the magnetic circuit inside the magnetic pole of the disc type electromagnet; the stainless steel magnetic shunt ring 52 is welded between the inner magnetic pole 51 and the outer magnetic pole 53, and the O-ring 2 and the retainer ring 10 are arranged outside the outer magnetic pole 53 to form a high pressure sealing retainer ring combination structure. Through the above two arrangements, the adjacent port of the electromagnet and the armature can withstand high pressure when the assembly is used in the electromagnetic valve, which meets the requirements of withstanding high pressure and bidirectional oil flow.

[0029] Embodiment 2. A two-position two-normal closed electromagnetic valve, which uses the coil assembly in Embodiment 1, as shown in Figure 2 which comprises a housing 4, one end of the housing 4 being connected to a sealing nut 3, and the other end being connected to a valve body 12, the end of the valve body 12 being connected to a locking nut 15; the coil assembly 5 is arranged in the housing 4 and the sealing nut 3, the outer magnetic pole 53, the inner magnetic pole 51 and the magnetic shunt ring 52 are flush at the end and are provided with an armature 7 at the adjacent position, the armature 7 is provided with a spring 8, the spring 8 is arranged on a spring seat 9, and the armature 7 is provided with a valve core 11 inside the valve body 12; the sealing nut 3 is connected to an electrical connector 1; corresponding flow channels, O-rings 2 and retainer rings 10 are arranged as shown in Figure 1 The end of the valve core 11 and the locking nut 15 are provided with a sealing seat 14.

[0030] The electromagnetic valve adopts a balanced cone valve structure, as shown in Figure 3As shown, the outer diameter D1 of the valve core 11 is equal to the orifice diameter D2 of the sealing seat 14. This ensures that whether high pressure enters from the bottom axial port or the side radial port, the hydraulic pressure acting on the valve core 11 remains balanced (canceling to zero). Therefore, high or low pressure will not affect the movement of the valve core 11, and the traction force required for the valve core 11 to move remains consistent under both high and low pressure conditions.

[0031] The working principle of this solenoid valve is referenced. Figure 2 As shown, when not energized, the valve core 11 is subjected to a downward spring force, generating sealing pressure that causes it to press tightly against the sealing seat 13, closing the flow channel and preventing inlet and outlet flow. When energized, the coil 54 generates a magnetic field, magnetizing the inner magnetic pole 51, outer magnetic pole 52, coil cover 57, and armature 7. This causes the armature 7 to experience an upward electromagnetic force. This electromagnetic force overcomes the spring force, pulling the valve core 11 upward, creating a gap with the sealing seat 13, opening the flow channel, and allowing communication between the inlet and outlet. (Reference) Figure 4 As shown.

[0032] Actual measurements show that the above-mentioned two normally closed solenoid valves can achieve a flow rate of 40 L / min (under a pressure difference of 1 MPa) and a response time of less than 5 ms; they can flow in both directions and withstand high pressures of over 35 MPa.

[0033] Example 3. A two-position, two-normally-opening solenoid valve, which uses the coil assembly of Example 1 and is configured as follows. Figure 5 As shown, the device includes a housing 4, with a sealing sleeve 3 connected to one end and a valve body 12 connected to the other end. A locking nut 15 is connected to the end of the valve body 12. A coil assembly 5 is disposed in the housing 4 and the sealing sleeve 3. An armature 7 is provided at the end of the outer magnetic pole 53, the inner magnetic pole 51, and the magnetic shielding ring 52, and is provided at adjacent locations. A spring 8 is sleeved on the armature 7 and is disposed on a spring seat 9. A valve core 11 is provided in the armature 7 and inside the valve body 12. The sealing sleeve 3 is connected to an electrical connector 1. Corresponding flow channels, O-rings 2, and retaining rings 10 are arranged according to... Figure 1 As shown; a sealing seat 14 is provided between the end of the valve core 11 and the locking nut 15.

[0034] This solenoid valve adopts a balanced cone valve structure, see reference. Figure 6 As shown, the outer diameter D1 of the valve core 11 is equal to the orifice diameter D3 of the valve body 12. This ensures that whether high pressure enters from the bottom axial port or the side radial port, the hydraulic pressure acting on the valve core 11 remains balanced (canceling to zero). Therefore, high or low pressure will not affect the movement of the valve core 11, and the traction force required for the valve core 11 to move remains consistent under both high and low pressure conditions.

[0035] The working principle of this solenoid valve is referenced. Figure 5As shown, when not energized, the valve core 11 is subjected to a downward spring force, causing it to separate from the valve body 12 and creating a gap, allowing communication between the inlet and outlet. When energized, the coil 54 generates a magnetic field, magnetizing the inner magnetic pole 51, outer magnetic pole 52, coil cover 57, and armature 7. This causes the armature 7 to experience an upward electromagnetic force. This electromagnetic force overcomes the spring force and provides sealing pressure, causing the valve core 11 to press tightly against the valve body 12, closing the flow path and preventing flow between the inlet and outlet. (Reference) Figure 7 As shown.

[0036] Actual measurements show that the above-mentioned two normally open solenoid valves can achieve a flow rate of 40 L / min (under a pressure difference of 1 MPa) and a response time of less than 5 ms; they can flow in both directions and withstand high pressures of over 35 MPa.

[0037] The above description is merely a preferred embodiment of the invention, but the scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the invention, based on the technical solution and concept of the invention, should be included within the scope of protection of the invention.

Claims

1. A disc electromagnet for a solenoid valve, characterized in that: It includes an outer magnetic pole (53), and an inner magnetic pole (51) is welded to the inner wall of one end of the outer magnetic pole (53) through a stainless steel magnetic shielding ring (52).

2. A coil assembly for a solenoid valve, characterized in that: It includes an outer magnetic pole (53), and an inner magnetic pole (51) is welded to the inner wall of one end of the outer magnetic pole (53) through a stainless steel magnetic shielding ring (52); the other end of the outer magnetic pole (53) is provided with a coil cover (57).

3. The coil assembly for a solenoid valve according to claim 2, characterized in that: A coil frame (55) is provided between the outer magnetic pole (53), the stainless steel magnetic shielding ring (52), the inner magnetic pole (51) and the coil cover (57). A coil (54) is provided on the coil frame (55), and a potting component (56) is provided between the coil (54) and the outer magnetic pole (53).

4. The coil assembly for a solenoid valve according to claim 3, characterized in that: The outer wall of the outer magnetic pole (53) is provided with a groove, and a sealing ring assembly is provided in the groove.

5. The coil assembly for a solenoid valve according to claim 4, characterized in that: The sealing ring assembly includes an O-ring (2) and a retaining ring (10) arranged side by side.

6. The coil assembly for a solenoid valve according to claim 5, characterized in that: The retaining ring (10) is positioned near the coil cover (57).

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