A low-leakage oil-controlled solenoid valve sealing structure

Abstract

The present invention discloses a low-leakage oil-controlled electromagnetic valve sealing structure, which relates to the field of electromagnetically controlled fluids. The technical solution thereof is as follows: it comprises a valve body with an oil nozzle and an electromagnetic valve body fixedly connected to the valve body, wherein the valve body is provided with an inlet and an outlet, an oil chamber is provided between the inlet and the outlet in the valve body, an iron core is provided on one side of the oil chamber in the valve body, a slider and a sealing element are coaxially slidably connected in the iron core toward the inlet in sequence, one end of the slider abuts against the sealing element, the other end of the slider is fixedly connected to a push rod provided on the output end of the electromagnetic valve body, a spring is provided between the end of the sealing element away from the slider and the valve body, a conical surface is provided on the sealing element, a right-angled edge is provided on the valve body in the oil chamber, the conical surface can be pressed against the right-angled edge, so that the right-angled edge forms a line contact with the conical surface. The present invention can select a smaller electromagnetic coil, which can play a good sealing role and reduce leakage.

Description

Technical Field

[0001] The invention relates to the field of electromagnetically controlled fluids, and more particularly to a low-leakage oil-controlled electromagnetic valve sealing structure. Background Art

[0002] Oil cooling and lubrication are vital to the engine. Under the requirements of high oil pressure and large flow in the engine, low leakage is a challenge to the sealing of the solenoid valve. The usual way is to select a larger solenoid coil to generate magnetic force to resist the oil pressure and reduce leakage. However, the disadvantage is that the solenoid valve is relatively large in size, requires more installation space, and has a higher cost.

[0003] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a low-leakage oil-controlled solenoid valve sealing structure. Under the conditions of large flow and lower leakage requirements, a smaller solenoid coil can be used to achieve better sealing, thereby reducing leakage. Therefore, the solenoid valve has the advantages of small size, low design cost and high sealing performance.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a low-leakage oil-controlled solenoid valve sealing structure, comprising a valve body with an oil nozzle and a solenoid valve body fixedly connected to the valve body, the valve body being provided with an inlet and an outlet, the valve body being provided with an oil chamber between the inlet and the outlet, the valve body being provided with an iron core on one side of the oil chamber, a slider and a sealing element being coaxially slidably connected in the iron core toward the inlet in sequence, one end of the slider being abutted against the sealing element, the other end of the slider being fixedly connected to a push rod arranged on the output end of the solenoid valve body, a spring being arranged between the end of the sealing element away from the slider and the valve body, a conical surface being provided on the sealing element, a right-angled edge being provided on the valve body in the oil chamber, the conical surface being pressed against the right-angled edge so that the right-angled edge forms a linear contact with the conical surface.

[0006] By adopting the above technical solution, through the setting of the conical surface and the right-angled edge, the conical surface is pressed against the right-angled edge during operation, so that the right-angled edge and the conical surface form a line contact, which can improve the sealing ability of the sealing element, thereby achieving the effect of reducing leakage.

[0007] The present invention is further configured as follows: the sliding block and the sealing element are respectively provided with a first arc-shaped portion and a second arc-shaped portion at their contact ends, and the first arc-shaped portion and the second arc-shaped portion are tangent to each other.

[0008] By adopting the above technical scheme, due to manufacturing and installation errors, when the push rod directly applies driving force to the sealing element, its concentricity is difficult to ensure, which will greatly reduce the sealing ability of the sealing element. By setting the slider, and setting a first arc portion on the slider, and setting a second arc portion on the sealing element, the push rod can push the sealing element to move while pushing the slider to move, and through such a design, the axial displacement, radial displacement and angular displacement generated during the movement of the slider and the sealing element can be compensated, so that it has better self-aligning ability, thereby achieving the effect of reducing leakage.

[0009] The present invention is further configured as follows: the inlet is a plurality of sector-shaped openings annularly arranged on the end surface of the oil nozzle around the axis of the valve body, and the plurality of sector-shaped openings are communicated with the oil cavity.

[0010] The present invention is further configured as follows: a connecting column is fixedly connected to the valve body at its axis, one end of the spring is fixedly connected to the connecting column, and the other end of the spring is embedded and connected in the sealing element.

[0011] By adopting the above technical solution, the connecting column is arranged at the center surrounding the plurality of sector-shaped openings, and during operation, the connecting column will not interfere with the oil inlet of the sector-shaped openings.

[0012] The present invention is further configured as follows: small oil leakage holes are provided on the sliding block and the sealing element.

[0013] The present invention is further configured as follows: a sealing portion is provided on the outer circumferential wall of the valve body, and a sealing rubber ring is provided on the sealing portion.

[0014] By adopting the above technical solution and providing the sealing rubber ring, the sealing performance of the connection between the present invention and the external equipment is improved.

[0015] The present invention is further configured such that: a flange for connecting to an external device is provided on one side of the sealing portion outside the valve body.

[0016] In summary, the present invention has the following beneficial effects: during operation, when the solenoid valve body is powered off, the spring and oil pressure move the sealing element, the slider and the push rod toward the solenoid valve body, and the engine oil flows into the outlet from the inlet arranged at the oil nozzle; when the solenoid valve body is powered on, the electromagnetic force pushes the push rod, the push rod pushes the slider, and the slider pushes the sealing element toward the inlet, the inlet is closed, and the inlet engine oil is prevented from flowing into the outlet, so that the inlet end of the oil nozzle is sealed, so that under the conditions of large flow and lower leakage requirements, a smaller electromagnetic coil can be selected, which is beneficial to reducing the design cost of the solenoid valve body. At the same time, through the design of the first arc portion and the second arc portion, the axial displacement, radial displacement and angular displacement generated during the movement of the slider and the sealing element can be compensated, so that it has better self-aligning ability, can play a good sealing role, and reduce leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a partial cross-sectional view of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 for Figure 2 Magnified view of part B in the middle.

[0021] In the figure: 1. valve body; 11. oil nozzle; 12. inlet; 13. outlet; 14. oil chamber; 15. right-angle edge; 2. sealing rubber ring; 3. solenoid valve body; 4. flange; 5. iron core; 6. push rod; 7. slider; 71. first arc-shaped portion; 8. sealing element; 81. second arc-shaped portion; 82. conical surface; 9. spring; 10. connecting column. DETAILED DESCRIPTION

[0022] 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.

[0023] A low leakage oil control solenoid valve sealing structure, such as Figure 1-Figure 4 As shown, it includes a valve body 1 with an oil nozzle 11 and a solenoid valve body 3 fixedly connected to the valve body 1, the valve body 1 is provided with an inlet 12 and an outlet 13, an oil chamber 14 is provided in the valve body 1 between the inlet 12 and the outlet 13, an iron core 5 is provided in the valve body 1 on one side of the oil chamber 14, a slider 7 and a sealing element 8 are coaxially slidably connected in the iron core 5 toward the inlet 12 in sequence, one end of the slider 7 is against the sealing element 8, and the other end of the slider 7 is fixedly connected to a push rod 6 provided on the output end of the solenoid valve body 3, A spring 9 is arranged between the end of the sealing element 8 away from the slider 7 and the valve body 1, and a conical surface 82 is arranged on the sealing element 8. A right-angled edge 15 is arranged on the valve body 1 in the oil chamber 14. The conical surface 82 can be pressed against the right-angled edge 15, so that the right-angled edge 15 forms a line contact with the conical surface 82. Through the arrangement of the conical surface 82 and the right-angled edge 15, the conical surface 82 is pressed against the right-angled edge 15 during operation, so that the right-angled edge 15 forms a line contact with the conical surface 82, thereby improving the sealing ability of the sealing element 8, thereby achieving the effect of reducing leakage.

[0024] On the basis of the above, the slider 7 and the sealing element 8 are respectively provided with a first arc portion 71 and a second arc portion 81 at their contact ends, and the first arc portion 71 and the second arc portion 81 are tangent to each other. Due to manufacturing and installation errors, when the push rod 6 directly applies a driving force to the sealing element 8, its concentricity is difficult to ensure, which will greatly reduce the sealing ability of the sealing element 8. By setting the slider 7, and setting the first arc portion 71 on the slider 7, and setting the second arc portion 81 on the sealing element 8, the push rod 6 can push the sealing element 8 to move while pushing the slider 7 to move, and through such a design, the axial displacement, radial displacement and angular displacement generated during the movement of the slider 7 and the sealing element 8 can be compensated, so that it has a better self-aligning ability, thereby achieving the effect of reducing the leakage.

[0025] On the basis of the above, the inlet 12 is a plurality of sector-shaped openings arranged in a ring shape around the axis of the valve body 1 on the end surface of the oil nozzle 11 , and the plurality of sector-shaped openings are communicated with the oil chamber 14 .

[0026] On the basis of the above, a connecting column 10 is fixedly connected to the valve body 1 at its axis, one end of the spring 9 is fixedly connected to the connecting column 10, and the other end of the spring 9 is embedded in the sealing element 8. The connecting column 10 is arranged at the center surrounding a plurality of fan-shaped openings. During operation, the connecting column 10 will not interfere with the oil inlet of the fan-shaped openings.

[0027] On the basis of the above, the slider 7 and the sealing element 8 are provided with oil leakage holes.

[0028] On the basis of the above, a sealing portion is provided on the outer circumferential wall of the valve body 1, and a sealing rubber ring 2 is provided on the sealing portion. The provision of the sealing rubber ring 2 improves the sealing performance of the connection between the present invention and the external equipment.

[0029] On the basis of the above, a flange 4 for connecting to external equipment is provided on the outside of the valve body 1 at one side of the sealing portion.

[0030] Working principle: During operation, when the solenoid valve body 3 is powered off, the spring 9 and the oil pressure move the sealing element 8, the slider 7 and the push rod 6 toward the solenoid valve body 3, and the engine oil flows from the inlet 12 set at the oil nozzle 11 into the outlet 13; when the solenoid valve body 3 is powered on, the electromagnetic force pushes the push rod 6, the push rod 6 pushes the slider 7, and the slider 7 pushes the sealing element 8 toward the inlet 12, and the inlet 12 is closed, preventing the engine oil at the inlet 12 from flowing into the outlet 13, so that the inlet 12 end at the oil nozzle 11 is sealed, so that under the conditions of large flow and lower leakage requirements, a smaller electromagnetic coil can be selected, which is beneficial to reducing the design cost of the solenoid valve body 3. At the same time, through the design of the first arc portion 71 and the second arc portion 81, the axial displacement, radial displacement and angular displacement generated during the movement of the slider 7 and the sealing element 8 can be compensated, so that it has better self-aligning ability, can play a good sealing role, and reduce leakage.

[0031] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A low-leakage oil-controlled solenoid valve sealing structure, comprising a valve body (1) having an oil nozzle (11) and a solenoid valve body (3) fixedly connected to the valve body (1), wherein the valve body (1) is provided with an inlet (12) and an outlet (13), characterized in that: An oil chamber (14) is provided in the valve body (1) between the inlet (12) and the outlet (13); an iron core (5) is provided in the valve body (1) on one side of the oil chamber (14); a slider (7) and a sealing element (8) are coaxially slidably connected in the iron core (5) toward the inlet (12) in sequence; one end of the slider (7) abuts against the sealing element (8); the other end of the slider (7) is fixedly connected to a push rod (6) provided on the output end of the solenoid valve body (3); a spring (9) is provided between the end of the sealing element (8) away from the slider (7) and the valve body (1); a conical surface (82) is provided on the sealing element (8); a right-angled edge (15) is provided on the valve body (1) in the oil chamber (14); the conical surface (82) can abut against the right-angled edge (15) so that the right-angled edge (15) and the conical surface (82) form a line contact; and the sealing element (8) is provided with a hollow annular structure; The slider (7) and the sealing element (8) are respectively provided with a first arc-shaped portion (71) and a second arc-shaped portion (81) in an annular shape at their contact ends, and the first arc-shaped portion (71) and the second arc-shaped portion (81) are tangent to each other; A connecting column (10) is fixedly connected to the valve body (1) at its axis, one end of the spring (9) is fixedly connected to the connecting column (10), and the other end of the spring (9) is embedded in and connected to the sealing element (8); When the solenoid valve body (3) is powered off, the spring (9) and the oil pressure move the sealing element (8), the slider (7) and the push rod (6) toward the solenoid valve body (3), and the engine oil flows from the inlet (12) provided at the oil nozzle (11) into the outlet (13). When the solenoid valve body (3) is powered on, the electromagnetic force pushes the push rod (6), and the push rod (6) pushes the slider (7), and the slider (7) pushes the sealing element (8) toward the inlet (12), and the inlet (12) is closed, preventing the engine oil at the inlet (12) from flowing into the outlet (13), so that the inlet (12) end at the oil nozzle (11) is sealed.

2. A low leakage oil control solenoid valve sealing structure according to claim 1, characterized in that: The inlet (12) is a plurality of sector-shaped openings which are arranged in a ring shape around the axis of the valve body (1) on the end surface of the oil nozzle (11), and the plurality of sector-shaped openings are in communication with the oil chamber (14).

3. The low leakage oil control solenoid valve sealing structure according to claim 1 is characterized in that: The sliding block (7) and the sealing element (8) are provided with small oil leakage holes.

4. The low leakage oil control solenoid valve sealing structure according to claim 1, characterized in that: A sealing portion is provided on the outer circumferential wall of the valve body (1), and a sealing rubber ring (2) is provided on the sealing portion.

5. A low leakage oil control solenoid valve sealing structure according to claim 4, characterized in that: A flange (4) for connecting to external equipment is provided on the outside of the valve body (1) at one side of the sealing portion.

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