A high-pressure oil passage control solenoid valve

Abstract

The application provides a high-pressure oil path control electromagnetic valve, which comprises a valve sleeve, a spring seat, a spring, a moving valve core, an armature, a lower ball support, a steel ball, an upper ball support, a shell, a nut, a coil and an elastic ring, the lower end of the armature is provided with the lower ball support, the upper end of the armature is provided with the upper ball support which has the same structure as the lower ball support, the steel ball is arranged in the recess on the flange bottom surface of the lower ball support and can roll in the recess, the steel ball is arranged in the recess on the flange bottom surface of the upper ball support and can roll in the recess. The high-pressure oil path control electromagnetic valve has simple structure, ingenious design and simple control, can inhibit the abrasion of the friction pair between the armature moving assembly and the armature mounting hole of the valve sleeve, and realizes high reliability of the oil path control electromagnetic valve.

Description

Technical Field

[0001] This invention relates to the field of control valve technology, and specifically to a high-pressure oil circuit control solenoid valve with a large working flow. Background Technology

[0002] Hydraulic working components are driven and controlled by connecting or disconnecting high-pressure oil. Oil circuit control is usually achieved using solenoid valves. Currently, the control solenoid valves constrain the radial displacement of the armature by having the upper and lower ends of the armature shaft installed in the bearing holes of sliding bearings on the upper and lower sides of the armature. After the solenoid valve has been working for a period of time, the upper and lower ends of the armature shaft wear and generate abrasive particles due to friction from the up and down movement of the armature. The abrasive particles in the friction pair affect the sliding fit of the armature shaft of the solenoid valve, causing the solenoid valve to jam and affecting the reliability of the oil circuit control. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention proposes a high-pressure oil circuit control solenoid valve that can suppress wear of the friction pair between the armature moving component and the valve sleeve armature mounting hole, thereby achieving high reliability of the oil circuit control solenoid valve operation.

[0004] To achieve the above technical solution, the present invention provides a high-pressure oil circuit control solenoid valve, comprising: a valve sleeve, a spring seat, a spring, a moving valve core, an armature, a lower ball bracket, a steel ball, an upper ball bracket, a housing, a nut, a coil, and an elastic ring. The spring seat is disposed within the bottom stop of the valve sleeve, and a spring is disposed within a recess on the spring seat. The lower end face of the spring abuts against the bottom surface of the recess of the spring seat. The moving valve core is installed in a moving valve core mounting hole in the lower part of the valve sleeve, and the upper end face of the spring abuts against the bottom surface of the bottom stop of the moving valve core. The armature is installed in an armature mounting hole in the upper part of the inner cavity of the valve sleeve, and the lower ball bracket is installed within the armature. At the lower end of the armature, a steel ball is installed in a recess on the bottom surface of the flange of the lower ball bracket. At the upper end of the armature, there is an upper ball bracket with the same structure as the lower ball bracket. The bracket fixing shaft of the upper ball bracket is fixed in the central hole of the upper part of the armature. A steel ball is installed in the recess on the bottom surface of the flange of the upper ball bracket. The outer shell is fitted onto the top stud of the valve sleeve. The nut is tightened onto the top stud of the valve sleeve to fix the outer shell onto the valve sleeve. The coil is installed inside the outer shell. The central hole of the coil is fitted onto the upper outer circle of the valve sleeve. The elastic ring is installed between the top surface of the hexagonal head on the middle flange of the valve sleeve and the bottom surface of the recess at the bottom of the coil.

[0005] Preferably, the valve sleeve is integrally welded from a lower valve sleeve, a weld seam, and an upper valve sleeve. A stud is provided at the top of the valve sleeve, and a flange is provided in the middle of the valve sleeve. A hexagonal head for tightening threads is provided on the top surface of the flange in the middle of the valve sleeve. A valve sleeve thread for installing and fixing a solenoid valve is provided below the flange in the middle of the valve sleeve. An armature mounting hole is provided in the upper part of the inner cavity of the valve sleeve, and a moving valve core mounting hole is provided in the lower part of the inner cavity of the valve sleeve. A stop is provided at the bottom end of the valve sleeve, an oil drain port is provided at the bottom of the valve sleeve, and an oil filling port is provided in the middle of the valve sleeve.

[0006] Preferably, the spring seat has a central through hole, a recess that connects to the central through hole, and a convex ring with a semi-circular cross-section on the upper end face of the spring seat.

[0007] Preferably, a lower sealing ring is provided on the outer side of the lower part of the moving valve core, a middle sealing ring is provided on the outer side of the middle part of the moving valve core, an upper auxiliary support ring is provided on the outer side of the upper part of the moving valve core, a tubular column integral with the moving valve core is provided on the upper auxiliary support ring, a stop is provided at the bottom end of the moving valve core, a moving valve core shaft hole is provided inside the moving valve core shaft, connecting the bottom stop of the moving valve core and the inner hole of the tubular column in the upper part of the moving valve core, an oil-filled flow groove is provided between the middle sealing ring and the upper auxiliary support ring, a radial flow hole is provided in the oil-filled flow groove, connecting the moving valve core shaft hole and the oil-filled flow groove, and a drain groove is provided between the middle sealing ring and the lower sealing ring.

[0008] Preferably, the ball support is provided with a support fixing shaft and a flange integral with the support fixing shaft. Several pits are provided on the bottom surface of the ball support flange. The bottom surface of the lower ball support abuts against the top surface of the tubular column above the moving valve core. The support fixing shaft of the lower ball support is fixed in the shaft hole at the bottom of the armature.

[0009] Preferably, the bottom of the coil is provided with a recess around the hexagonal head covering the flange in the middle of the valve sleeve, and a raised ring is provided on the outer circle of the bottom of the coil. The raised ring on the outer circle of the bottom of the coil is tightly fitted and fixed in the hole of the outer shell so that the outer shell and the coil are fixed as a whole.

[0010] The beneficial effects of the high-pressure oil circuit control solenoid valve provided by this invention are as follows: This high-pressure oil circuit control solenoid valve has a simple structure, ingenious design, and simple control. It can suppress the wear of the friction pair between the armature moving assembly and the armature mounting hole of the valve sleeve, thus achieving high reliability of the oil circuit control solenoid valve. In actual operation, the radial displacement of the upper and lower ends of the armature is constrained, maintaining a gap between the outer circle of the armature and the wall of the armature mounting hole in the valve sleeve, thereby avoiding scraping between the armature and the wall of the armature mounting hole in the valve sleeve during the up-and-down axial movement. The rolling of the steel ball in the recess of the lower ball bracket and the upper ball bracket reduces the frictional resistance between the armature moving assembly and the wall of the armature mounting hole in the valve sleeve during the up-and-down axial movement of the armature moving assembly, improving the motion sensitivity of the armature moving assembly, suppressing the wear of the friction pair between the armature moving assembly and the armature mounting hole of the valve sleeve, and achieving high reliability of the oil circuit control solenoid valve. Attached Figure Description

[0011] Figure 1 This is a structural view of the solenoid valve of the present invention in the unenergized state.

[0012] Figure 2 This is a structural view of the valve sleeve of the solenoid valve of the present invention.

[0013] Figure 3 This is a structural view of the ball support of the solenoid valve of the present invention.

[0014] Figure 4 This is a structural view of the solenoid valve of the present invention in the energized state. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0016] Example: A high-pressure oil circuit control solenoid valve.

[0017] Reference Figures 1 to 4 As shown, a high-pressure oil circuit control solenoid valve includes: a valve sleeve 1, a spring seat 2, a spring 3, a moving valve core 4, an armature 5, a lower ball bracket 6, a steel ball 7, an upper ball bracket 8, a housing 9, a nut 10, a coil 11, and an elastic ring 12. The valve sleeve 1 is integrally welded from a lower valve sleeve 1-1, a weld 1-2, and an upper valve sleeve 1-3. A stud 1-4 is provided on the top of the valve sleeve 1, and a flange 1-5 is provided in the middle of the valve sleeve 1. A hexagonal head 1-6 for tightening threads is provided on the top surface of the flange 1-5 in the middle of the valve sleeve, and a valve sleeve thread 1-7 for installing and fixing the solenoid valve is provided below the flange 1-5 in the middle of the valve sleeve. The upper part of the inner cavity of the valve sleeve 1... The valve sleeve 1 is provided with an armature mounting hole 1-8, a moving valve core mounting hole 1-9 is provided in the lower part of the inner cavity of the valve sleeve 1, a stop 1-10 is provided at the bottom of the valve sleeve 1, an oil drain port 1-11 is provided at the bottom of the valve sleeve 1, an oil filling port 1-12 is provided in the middle of the valve sleeve 1, a spring seat 2 is provided in the stop 1-10 at the bottom of the valve sleeve 1, the spring seat 2 is provided with a shaft through hole 2-1, a recess 2-2 is provided on the spring seat 2 to connect with the shaft through hole 2-1, a convex ring 2-3 with a semi-circular cross section is provided on the upper end face of the spring seat 2, a spring 3 is provided in the recess 2-2 on the spring seat 2, and the lower end face of the spring 3 abuts against the bottom surface of the recess 2-2 of the spring seat 2.

[0018] The moving valve core 4 is installed in the moving valve core mounting hole 1-9 in the lower part of the valve sleeve 1. A lower end sealing ring 4-1 is provided on the outer side of the lower part of the moving valve core 4, a middle sealing ring 4-2 is provided on the outer side of the middle part of the moving valve core 4, and an upper end auxiliary support ring 4-3 is provided on the outer side of the upper part of the moving valve core 4. A tubular column 4-4 integral with the moving valve core 4 is provided on the upper auxiliary support ring 4-3 of the moving valve core 4. A stop 4-5 is provided at the bottom end of the moving valve core 4. A moving valve core is provided inside the shaft of the moving valve core 4, which connects the bottom end stop 4-5 of the moving valve core and the inner hole of the tubular column 4-4 at the top of the moving valve core 4. A rotating valve core has a shaft hole 4-6. An oil-filled flow groove 4-7 is provided between the middle sealing ring 4-2 and the upper auxiliary support ring 4-3 of the rotating valve core. A radial flow hole 4-8 of the rotating valve core is provided in the oil-filled flow groove 4-7, which connects the rotating valve core shaft hole 4-6 and the oil-filled flow groove 4-7. A drain groove 4-9 of the rotating valve core is provided between the middle sealing ring 4-2 and the lower sealing ring 4-1 of the rotating valve core. The upper end face of the spring 3 abuts against the bottom surface of the bottom stop 4-5 of the rotating valve core. The armature 5 is installed in the armature mounting hole 1-8 in the upper part of the inner cavity of the valve sleeve 1.

[0019] The lower end of the armature 5 is provided with a lower ball support 6. The ball support 6 is provided with a support fixing shaft 6-1 and a flange 6-2 integral with the support fixing shaft 6-1. Several pits 6-3 are provided on the bottom surface of the ball support flange 6-2. The bottom surface of the lower ball support 6 abuts against the top surface of the tubular column 4-4 on the upper part of the moving valve core 4. The support fixing shaft 6-1 of the lower ball support 6 is fixed in the shaft hole at the lower part of the armature 5. A steel ball 7 is provided in the pit 6-3 on the bottom surface of the flange 6-2 of the lower ball support 6. The steel ball 7 can roll in the pit 6-3 on the bottom surface of the flange 6-2 of the lower ball support 6.

[0020] The upper end of the armature 5 is provided with an upper ball bracket 8, which has the same structure as the lower ball bracket. The bracket fixing shaft of the upper ball bracket 8 is fixed in the shaft hole at the upper part of the armature 5. A steel ball 7 is provided in the recess on the bottom surface of the flange of the upper ball bracket 8. The steel ball 7 can roll in the recess on the bottom surface of the flange of the upper ball bracket 8. The outer shell 9 is fitted on the top stud 1-4 of the valve sleeve (1). The nut 10 is tightened on the top stud 1-4 of the valve sleeve 1 to fix the outer shell 9 on the valve sleeve 1.

[0021] The coil 11 is installed inside the housing 9. The axial hole of the coil 11 is fitted onto the upper outer circle of the valve sleeve 1. The bottom of the coil 11 is provided with a recess 12-1 around the hexagonal head 1-6 covering the middle flange 1-5 of the valve sleeve 1. A convex ring 12-2 is provided on the bottom outer circle of the coil 11. The convex ring 12-2 on the bottom outer circle of the coil 11 is tightly fixed in the hole of the housing 9, so that the housing 9 and the coil 11 are fixed as a whole. The elastic ring 12 is installed between the top surface of the hexagonal head 1-6 on the middle flange 1-5 of the valve sleeve 1 and the bottom surface of the recess 12-1 at the bottom of the coil 11. The axial tension of the compressed elastic ring 12 prevents the nut 10 tightened on the top stud 1-4 of the valve sleeve 1 from loosening. The sealing ring 4-1 at the lower end of the moving valve core always seals the flow channel between the oil drain port 1-11 of the valve sleeve 1 and the oil inlet chamber at the bottom of the moving valve core 4.

[0022] In this embodiment, when the solenoid valve is not energized, the spring force of spring 3 pushes the valve core 4 upward, causing the upper end of the sealing ring 4-2 in the middle of the moving valve core to seal the flow channel above the oil filling port 1-12 of the valve sleeve 1. At the same time, the lower end of the sealing ring 4-2 in the middle of the moving valve core opens the flow channel below the oil filling port 1-12 of the valve sleeve 1. The oil in the hydraulic working chamber enters the moving valve core drain groove 4-9 from the oil filling port 1-12 of the valve sleeve 1 and leaks through the drain port 1-11 of the valve sleeve 1, thereby resetting the hydraulic working components and lowering the ball. The apex of the spherical side of the steel ball 7 in the recess on the bottom surface of the flange of bracket 6, near the armature axis, abuts against the protruding outer circle below the armature 5. Simultaneously, the apex of the spherical side of the steel ball 7 in the recess on the bottom surface of the flange of bracket 6, near the wall of the armature mounting hole 1-8 inside the valve sleeve, abuts against the wall of the armature mounting hole 1-8 inside the valve sleeve, thus constraining the radial displacement of the lower end of the armature 5. The apex of the spherical side of the steel ball 7 in the recess on the bottom surface of the flange of bracket 8, near the armature axis, abuts against the protruding outer circle above the armature 5. Simultaneously, the apex of the spherical side of the steel ball 7 in the recess on the bottom surface of the upper ball bracket 8 flange, near the wall of the armature mounting hole 1-8 in the valve sleeve, abuts against the wall of the armature mounting hole 1-8 in the valve sleeve, thus constraining the radial displacement of the upper end of the armature 5. The radial displacement of the upper and lower ends of the armature 5 is constrained, so that a gap is maintained between the outer circle of the armature 5 and the wall of the armature mounting hole 1-8 in the valve sleeve, thus avoiding the scraping of the armature 5 against the wall of the armature mounting hole 1-8 in the valve sleeve when the armature 5 moves up and down axially. The steel ball 7 can roll in the recess of the lower ball bracket 6 and the recess of the upper ball bracket 8, which reduces the frictional resistance between the armature moving assembly and the wall of the armature mounting hole 1-8 in the valve sleeve when the armature moving assembly moves up and down axially, improves the motion sensitivity of the armature moving assembly, and suppresses the wear of the friction pair between the armature moving assembly and the armature mounting hole 1-8 in the valve sleeve, thereby achieving high reliability of the oil circuit control solenoid valve.

[0023] When the solenoid valve is energized, the magnetic field generated by coil 11 drives armature 5 to move downward. Armature 5 pushes the lower ball support 6 downward, which in turn pushes the valve core 4 downward, causing the bottom surface of the moving valve core 4 to abut against the semi-circular convex ring 2-3 on the upper surface of spring seat 2. At the same time, the lower end of the sealing ring 4-2 in the middle of the moving valve core seals the flow channel below the oil filling port 1-12 of valve sleeve 1, while the upper end of the sealing ring 4-2 in the middle of the moving valve core opens the flow channel above the oil filling port 1-12 of valve sleeve 1. Oil enters the solenoid valve through the axial through hole 2-1 of spring seat 2 and then flows through the axial hole 4-6 of the moving valve core, the radial flow hole 4-8 of the moving valve core, and the oil filling flow groove 4-7 of the moving valve core, filling the hydraulic working chamber through the oil filling port 1-12 of valve sleeve 1, thereby driving the hydraulic working components to work. The flow channel between the oil filling port 1-12 and the oil drain port 1-11 of valve sleeve 1 is closed, and the lower end of the moving valve core is sealed. The outer circle of the collar 4-1 seals the flow channel between the drain port 1-11 of the valve sleeve 1 and the bottom oil chamber of the moving valve core 4. At the same time, the bottom surface of the moving valve core 4 abuts against the semi-circular convex ring 2-3 on the upper end face of the spring seat 2 to form a second seal. The semi-circular cross-section of the convex ring 2-3 on the upper end face of the spring seat 2 makes its contact with the bottom surface of the moving valve core 4 a line contact seal, which has a high sealing performance and reduces the leakage from the oil inlet chamber of the solenoid valve to the drain port 1-11 of the valve sleeve 1. The radial support of the upper end of the moving valve core auxiliary support collar 4-3 and the lower end of the moving valve core sealing collar 4-1 on the upper and lower ends of the moving valve core 4 suppresses the jamming when the middle sealing collar 4-2 of the moving valve core seals the oil filling flow channel above the oil filling port 1-12 of the valve sleeve 1 or seals the drain flow channel below the oil filling port 1-12 of the valve sleeve 1, thus realizing the high reliability of the movement of the moving valve core of the oil circuit control solenoid valve.

[0024] This high-pressure oil circuit control solenoid valve has a simple structure, ingenious design, and easy control. It can suppress the wear of the friction pair between the armature moving component and the valve sleeve armature mounting hole, thus achieving high reliability of the oil circuit control solenoid valve. In actual operation, the upper end of the armature is equipped with an upper ball support with the same structure as the lower ball support. A steel ball is placed in a recess on the bottom surface of the flange of the lower ball support, allowing the steel ball to roll within this recess. Similarly, a steel ball is placed in a recess on the bottom surface of the flange of the upper ball support, allowing the steel ball to roll within this recess. The apex of the spherical side of the steel ball in the recess on the bottom surface of the lower ball support flange, near the axis of the armature mounting hole in the valve sleeve, abuts against the protruding outer circle above the armature. The apex of the spherical side of the steel ball in the recess on the bottom surface of the lower ball support flange, near the axis of the armature mounting hole in the valve sleeve, abuts against the wall of the armature mounting hole in the valve sleeve, thus constraining the radial displacement of the lower end of the armature. The apex of the spherical side of the steel ball in the recess on the bottom surface of the upper ball support flange, near the axis of the armature mounting hole in the valve sleeve, abuts against the protruding outer circle above the armature. The apex of the ball's side surface, near the wall of the armature mounting hole inside the valve sleeve, abuts against the wall of the armature mounting hole inside the valve sleeve, thus constraining the radial displacement of the upper end of the armature. The constrained radial displacement of the upper and lower ends of the armature maintains a gap between the outer circle of the armature and the wall of the armature mounting hole inside the valve sleeve, preventing the armature from scraping against the wall of the armature mounting hole inside the valve sleeve during vertical axial movement. The rolling of the steel ball in the recess of the lower ball bracket and the rolling of the steel ball in the recess of the upper ball bracket reduce the frictional resistance between the armature moving assembly and the wall of the armature mounting hole inside the valve sleeve during vertical axial movement of the armature moving assembly, improving the motion sensitivity of the armature moving assembly, suppressing the wear of the friction pair between the armature moving assembly and the armature mounting hole of the valve sleeve, and achieving high reliability of the oil circuit control solenoid valve.

[0025] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in the embodiments and drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-pressure oil circuit control solenoid valve, characterized in that... include: The valve consists of a valve sleeve, spring seat, spring, moving valve core, armature, lower ball bracket, steel ball, upper ball bracket, outer shell, nut, coil, and elastic ring. The spring seat is located inside the bottom stop of the valve sleeve, and the spring is installed in a recess on the spring seat. The lower end face of the spring abuts against the bottom surface of the recess in the spring seat. The moving valve core is installed in the moving valve core mounting hole in the lower part of the valve sleeve, and the upper end face of the spring abuts against the bottom surface of the bottom stop of the moving valve core. The armature is installed in the armature mounting hole in the upper part of the inner cavity of the valve sleeve. The lower ball bracket is installed at the lower end of the armature, and the steel ball is installed on the lower ball bracket. Inside the recess on the flange bottom surface, an upper ball bracket with the same structure as the lower ball bracket is provided at the upper end of the armature. The bracket fixing shaft of the upper ball bracket is fixed in the shaft hole at the upper part of the armature. A steel ball is provided in the recess on the flange bottom surface of the upper ball bracket. The outer shell is fitted on the top stud of the valve sleeve. The nut is tightened on the top stud of the valve sleeve to fix the outer shell on the valve sleeve. The coil is installed inside the outer shell. The shaft hole of the coil is fitted on the upper outer circle of the valve sleeve. The elastic ring is installed between the top surface of the hexagonal head on the middle flange of the valve sleeve and the bottom surface of the recess at the bottom of the coil. The valve sleeve is welded together by a lower valve sleeve, a weld seam, and an upper valve sleeve. A stud is provided at the top of the valve sleeve, and a flange is provided in the middle of the valve sleeve. A hexagonal head for tightening the thread is provided on the top surface of the flange in the middle of the valve sleeve. A valve sleeve thread for installing and fixing a solenoid valve is provided below the flange in the middle of the valve sleeve. An armature mounting hole is provided in the upper part of the inner cavity of the valve sleeve, and a moving valve core mounting hole is provided in the lower part of the inner cavity of the valve sleeve. A stop is provided at the bottom end of the valve sleeve, an oil drain port is provided at the bottom of the valve sleeve, and an oil filling port is provided in the middle of the valve sleeve. The spring seat is provided with a axial through hole, and a recess that connects to the axial through hole is provided on the spring seat. A convex ring with a semi-circular cross-section is provided on the upper end face of the spring seat. A lower sealing ring is provided on the outer side of the lower part of the moving valve core, a middle sealing ring is provided on the outer side of the middle part of the moving valve core, and an upper auxiliary support ring is provided on the outer side of the upper part of the moving valve core. A tubular column integral with the moving valve core is provided on the upper auxiliary support ring. A stop is provided at the bottom end of the moving valve core. A moving valve core shaft hole is provided inside the moving valve core shaft, connecting the bottom stop of the moving valve core and the inner hole of the tubular column in the upper part of the moving valve core. An oil-filled flow groove is provided between the middle sealing ring and the upper auxiliary support ring. A radial flow hole is provided in the oil-filled flow groove, connecting the moving valve core shaft hole and the oil-filled flow groove. A drain groove is provided between the middle sealing ring and the lower sealing ring.

2. The high-pressure oil circuit control solenoid valve according to claim 1, characterized in that: The ball support is provided with a support fixing shaft and a flange integral with the support fixing shaft. Several pits are provided on the bottom surface of the ball support flange. The bottom surface of the lower ball support abuts against the top surface of the tubular column above the moving valve core. The support fixing shaft of the lower ball support is fixed in the shaft hole at the bottom of the armature.

3. The high-pressure oil circuit control solenoid valve according to claim 2, characterized in that: The bottom of the coil is provided with a recess around the hexagonal head that covers the flange in the middle of the valve sleeve. A raised ring is provided on the outer circle of the bottom of the coil. The raised ring on the outer circle of the bottom of the coil is tightly fitted and fixed in the hole of the outer shell, so that the outer shell and the coil are fixed as a whole.

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