Damping regulating valve

Abstract

The invention provides a damping adjusting valve. The damping adjusting valve comprises a coil, a shell, a valve sleeve, a sealing ring, an outer valve seat, a movable valve element, a movable valve element spring, a spring seat, a sliding block, a valve rod, an inner valve seat, a reed, an armature spring, an armature, a ball support, a steel ball and a clamping spring. The damping regulating valve is simple in structure and ingenious in design, and through the design of the structure of the damping regulating valve and the flow channel, driving force which needs to overcome oil pressure resistance and drives the valve rod to move downwards can be obtained only by applying small working current. The small working current enables the current rise hysteresis from starting to electrifying to the minimum damping working current caused by the coil inductance suppression current change to be small, and the corresponding electromagnetic valve working current can be applied according to different working conditions, so that the flow channel damping of the damping adjusting valve can be adjusted and controlled.

Description

Technical Field

[0001] The invention relates to the technical field of regulating valves, and in particular to a damping regulating valve with a large working flow rate. Background Art

[0002] Traditional vehicle shock absorbers have fixed damping characteristics, providing fixed buffering performance during the expansion and contraction process of the shock absorber, and have poor adaptability to working conditions. With the continuous development of automobile technology, adjustable damping shock absorbers are used in automobiles, which improves the comfort, maneuverability and safety of the vehicle. Adjustable damping shock absorbers require a damping regulating valve to control the damping of the shock absorber. However, the existing damping adjustable control valve has a complex structure, difficult damping control operation, and low damping control accuracy. Moreover, the upper and lower axial holes of the valve stem of the current damping regulating valve are not connected to each other. The electromagnetic force that drives the valve stem to move downward must overcome the elastic force of the armature spring and the oil pressure resistance in the spring seat valve hole to drive the valve stem to move downward. Therefore, the response hysteresis of the damping regulating valve is very large. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention proposes a damping regulating valve with simple structure, high damping control accuracy and small response hysteresis.

[0004] In order to realize the above technical scheme, the present invention provides a damping regulating valve, including: a coil, a shell, a valve sleeve, a sealing ring, an outer valve seat, a moving valve core, a moving valve core spring, a spring seat, a slider, a valve stem, an inner valve seat, a reed, an armature spring, an armature, a ball bracket, a steel ball and a retaining spring, wherein the coil is installed in the upper hole of the shell, the upper part of the valve sleeve passes through the axial hole of the shell and extends into the hole of the coil, a sealing ring installation groove is arranged on the outer side of the valve sleeve, the valve sleeve is provided with a radial flow hole connecting the inside and outside of the valve sleeve, the sealing ring is installed in the sealing ring installation groove on the outer side of the valve sleeve, and the outer valve seat is tightly fitted The outer valve seat is fixed at the bottom of the valve sleeve, an axial through hole is arranged on the outer valve seat, a radial flow hole connecting the inner and outer sides of the outer valve seat is arranged on the side of the outer valve seat, a flow notch is arranged on the outer side of the outer valve seat, a moving valve core is installed in the outer valve seat, a throttling hole is arranged at the axis of the bottom of the moving valve core, a moving valve core spring is installed in the inner cavity of the moving valve core, a spring seat is fixed in the axial hole of the valve sleeve with a tight fit, a slider is installed in the slider mounting hole of the spring seat, a flow hole penetrating the upper and lower end surfaces of the slider is arranged on the slider, a valve stem bottom is fixed in the axial hole of the slider with a tight fit, a countersunk hole is arranged at the bottom of the valve stem, and a valve stem axis is fixed in the axial hole of the slider. The center is provided with an axial through hole that passes through the upper and lower ends of the valve stem, the inner valve seat and the reed are installed in the stop at the lower end of the spring seat, the bottom surface of the reed abuts against the top surface of the inner valve seat, the axis of the reed is provided with a through hole, the outer periphery of the axial hole of the reed is provided with a flow groove, an armature spring is provided on the spring seat, the upper part of the valve stem passes through the axial through hole of the spring seat and extends into the axial hole of the armature, the upper part of the valve stem is tightly fitted with the bottom axial hole of the armature, the bottom surface of the armature abuts against the top surface of the armature spring, the ball bracket is fixed to the top of the armature, the axis of the ball bracket is provided with an axial through hole that passes through the upper and lower ends of the ball bracket, A steel ball for constraining the radial displacement of the top of the armature is arranged between the top surface of the armature and the flange of the ball bracket, and the retaining spring is clamped in the clamping groove of the coil and the clamping groove of the outer shell to fix the coil in the outer shell, and an overflow gap δ1 is arranged between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core, an overflow gap δ2 is arranged between the outer circle of the slider and the slider mounting hole in the spring seat, an overflow gap δ3 is arranged between the bottom surface of the valve stem and the top surface of the reed, an overflow gap δ4 is arranged between the top surface of the slider and the top surface of the overflow groove in the spring seat, and an overflow gap δ5 is arranged between the bottom surface of the slider and the bottom surface of the valve stem.

[0005] In the above technical scheme, when the damping regulating valve is not energized, the elastic force of the armature spring pushes the armature upward, and the armature drives the valve stem and the slider to move upward so that the top surface of the slider abuts against the top surface of the flow groove in the spring seat and closes the flow gap δ4 between the top surface of the slider and the top surface of the flow groove in the spring seat. After the oil pressure in the axial hole of the outer valve seat increases, the oil in the inner cavity of the moving valve core leaks to the oil cavity at the bottom of the shell through the bypass regulating flow channel. The throttling effect of the axial throttling hole at the bottom of the moving valve core causes a pressure difference to be generated between the inner cavity of the moving valve core and the bottom surface of the moving valve core. The axial force generated by the pressure difference acting on the moving valve core overcomes the elastic force of the moving valve core spring to push the moving valve core upward and open the gap between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core. The high-pressure oil in the axial hole of the outer valve seat leaks from the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core and the radial flow holes on the side of the outer valve seat to the oil chamber at the bottom of the shell. Under this working condition, the damping of the bypass regulating flow channel of the damping regulating valve is in an intermediate damping state between the minimum damping and the maximum damping, and correspondingly, the damping of the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core is in an intermediate damping state between the minimum damping and the maximum damping, and the flow gap δ3 between the bottom surface of the valve stem and the top surface of the reed decreases with the increase of the flow gap δ4 between the top surface of the slider and the top surface of the flow groove in the spring seat, showing an opposite trend. After the damping regulating valve is energized, the electromagnetic force overcomes the elastic force of the armature spring and drives the armature to drive the valve stem and the slider to move downward, so that the flow gap δ4 between the top surface of the slider and the top surface of the flow groove in the spring seat is opened, and at the same time, the flow gap δ3 between the bottom surface of the valve stem and the top surface of the reed is reduced. After the damping regulating valve applies the minimum damping working current, the electromagnetic force overcomes the elastic force of the armature spring and drives the armature to drive the valve stem and the slider to move downward, so that the flow cross-sectional area of ​​the additional flow channel of the flow gap δ4 opened between the top surface of the slider and the top surface of the flow groove in the spring seat is equal to the sum of the flow cross-sectional area of ​​the flow gap δ2 between the outer circle of the slider and the slider mounting hole in the spring seat and the flow cross-sectional area of ​​the flow gap δ3 between the bottom surface of the valve stem and the top surface of the reed, so that the damping of the bypass regulating flow channel of the damping regulating valve is minimized, and the oil in the inner cavity of the moving valve core passes through The damping of the bypass regulating flow channel leaking to the oil chamber at the bottom of the shell is minimal, and the throttling effect of the axial throttling hole at the bottom of the moving valve core maximizes the pressure difference between the inner cavity of the moving valve core and the bottom surface of the moving valve core, and maximizes the pressure difference acting on the inner cavity and the bottom of the moving valve core. The axial force generated by the pressure difference between the inner cavity and the bottom of the moving valve core overcomes the elastic force of the moving valve core spring to push the moving valve core upward and open the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core to a fully open state. The damping of the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core is in a minimum damping state, and the axial through hole penetrating the upper and lower ends of the valve stem and the axial through hole penetrating the upper and lower ends of the ball bracket connect the oil chamber at the bottom of the valve stem and the oil chamber at the top of the ball bracket. The axial resultant force of the oil pressure acting on the valve stem is always zero, thereby eliminating the back pressure resistance of the valve stem movement caused by the oil pressure.

[0006] Preferably, the spring seat is provided with an axial through hole, a slider mounting hole is provided inside the spring seat, a stop is provided at the lower end of the spring seat, an inner flow groove is provided inside the spring seat, an outer flow groove is provided outside the spring seat, a radial flow hole connecting the inner and outer flow grooves is provided on the spring seat, and a countersunk hole is provided on the top surface of the inner flow groove of the spring seat.

[0007] Preferably, a throttling hole is provided at the bottom of the inner valve seat, and a countersunk hole connected to the throttling hole at the bottom of the inner valve seat is provided at the center of the top of the inner valve seat. The hole diameter of the central countersunk hole at the top of the inner valve seat is the same as the outer circle diameter of the valve stem installed in the axial through hole of the spring seat, and a flow groove is provided around the central countersunk hole at the top of the inner valve seat.

[0008] Preferably, the flow gap between the bottom surface of the valve stem and the top surface of the spring leaf decreases as the flow gap between the top surface of the slider and the top surface of the flow groove in the spring seat increases.

[0009] Preferably, the axial throttling hole at the bottom of the moving valve core, the inner cavity of the moving valve core, the throttling hole at the bottom of the inner valve seat, the central countersunk hole on the top of the inner valve seat, the axial hole of the reed, the flow gap between the bottom surface of the valve stem and the top surface of the reed, the flow gap between the bottom surface of the slider and the bottom surface of the valve stem, the flow gap between the outer circle of the slider and the slider mounting hole in the spring seat, the inner flow groove inside the spring seat, the radial flow hole connecting the inner and outer flow grooves of the spring seat, the outer flow groove outside the spring seat, the radial flow holes connecting the inside and outside of the valve sleeve and the flow notch on the outside of the outer valve seat constitute the bypass regulating flow channel of the damping regulating valve.

[0010] Preferably, the flow gap between the bottom surface of the slider and the bottom surface of the valve stem, the flow hole passing through the upper and lower end surfaces of the slider, the countersunk hole on the top surface of the flow groove in the spring seat at the top of the slider, and the flow gap between the top surface of the slider and the top surface of the flow groove in the spring seat to the flow groove in the spring seat constitute an additional bypass regulating flow channel.

[0011] Preferably, the slider and the valve stem are an integrated structure.

[0012] The beneficial effect of a damping regulating valve provided by the present invention is that the damping regulating valve has a simple structure and an ingenious design. By designing the structure and flow channel of the damping regulating valve, only a small working current needs to be applied to obtain the driving force required to overcome the oil pressure resistance to drive the valve stem to move downward. The small working current makes the current increase hysteresis from the beginning of power-on to the minimum damping working current caused by the coil inductance suppressing the current change. At the same time, the countersunk hole diameter on the top surface of the flow groove in the spring seat is much larger than the valve stem shaft diameter of the current damping regulating valve, so that the slider of the damping regulating valve of the present invention moves downward with a small stroke to obtain a sufficiently large flow cross-sectional area of ​​the flow gap δ4 between the top surface of the slider and the top surface of the flow groove in the spring seat. The small movement stroke makes the movement response hysteresis of the moving part small. The small current increase hysteresis of the applied working current plus the small movement response hysteresis of the moving part make the power-on work response hysteresis of the damping regulating valve of the present invention small. During actual operation, when the damping regulating valve is not energized, the damping of the flow channel of the damping regulating valve is in an intermediate damping state. After the damping regulating valve applies the minimum damping working current, the flow channel damping of the damping regulating valve is the smallest. After the damping regulating valve applies the maximum working current, the flow channel damping of the damping regulating valve is the largest. The flow channel damping of the damping regulating valve can be adjusted and controlled by applying the corresponding solenoid valve working current according to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural view of the damping regulating valve of the present invention in the intermediate damping state.

[0014] Figure 2 This is a structural view of the spring seat of the damping regulating valve of the present invention.

[0015] Figure 3 It is a structural view of the damping regulating valve of the present invention in the minimum damping state.

[0016] Figure 4 It is a structural view of the damping regulating valve of the present invention in the maximum damping state. DETAILED DESCRIPTION

[0017] 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. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0018] Embodiment: A damping regulating valve.

[0019] like Figure 1As shown, a damping regulating valve comprises a coil 1, a shell 2, a valve sleeve 3, a sealing ring 4, an outer valve seat 5, a moving valve core 6, a moving valve core spring 7, a spring seat 8, a slider 9, a valve stem 10, an inner valve seat 11, a reed 12, an armature spring 13, an armature 14, a ball bracket 15, a steel ball 16 and a retaining ring 17, wherein the coil 1 is installed in the upper hole of the shell 2, the upper part of the valve sleeve 3 passes through the axial hole of the shell 2 and extends into the hole of the coil 1, a sealing ring mounting groove is arranged on the outer side of the valve sleeve 3, the valve sleeve 3 is provided with a radial flow hole connecting the inside and outside of the valve sleeve, the sealing ring 4 is installed in the sealing ring mounting groove on the outer side of the valve sleeve 3, the outer valve seat 5 is fixed to the bottom of the valve sleeve 3 in a tight fit, an axial through hole is arranged on the outer valve seat 5, and a side of the outer valve seat 5 is provided with a through hole connecting the outer valve seat Inside and outside radial flow holes, the outer side of the outer valve seat 5 is provided with a flow notch, the moving valve core 6 is installed in the outer valve seat 5, the bottom axis of the moving valve core 6 is provided with a throttling hole, the moving valve core spring 7 is installed in the inner cavity of the moving valve core 6, the spring seat 8 is tightly fixed in the axial hole of the valve sleeve 3, the spring seat 8 is provided with an axial through hole 8-1, the spring seat 8 is provided with a slider mounting hole 8-2, the lower end of the spring seat 8 is provided with a stop 8-3, the spring seat 8 is provided with an inner flow groove 8-4, the spring seat 8 is provided with an outer flow groove 8-5 outside, the spring seat 8 is provided with a radial flow hole 8-6 connecting the inner and outer flow grooves, the top surface of the inner flow groove 8-4 of the spring seat 8 is provided with a countersunk hole 8-7, the slider 9 is installed in the slider mounting hole 8-2 of the spring seat 8, and the slider 9 A flow hole is provided which passes through the upper and lower end surfaces of the slider 9, the bottom of the valve stem 10 is tightly fixed in the axial hole of the slider 9, a countersunk hole is provided at the bottom of the valve stem 10, and an axial through hole which passes through the upper and lower ends of the valve stem 10 is provided at the axis of the valve stem 10. The slider 9 and the valve stem 10 can also be an integrated structure, the inner valve seat 11 and the reed 12 are installed in the stop 8-3 at the lower end of the spring seat 8, the bottom surface of the reed 12 abuts against the top surface of the inner valve seat 11, a throttling hole 11-1 is provided at the bottom of the inner valve seat 11, and a countersunk hole 11-2 which is connected to the throttling hole 11-1 at the bottom of the inner valve seat 11 is provided at the center of the top of the inner valve seat 11, and the hole diameter of the central countersunk hole 11-2 at the top of the inner valve seat 11 is the same as the outer diameter of the valve stem 10 installed in the axial through hole 8-1 of the spring seat 8. , a flow groove 11-3 is arranged around the central countersunk hole 11-2 at the top of the inner valve seat 11, a through hole 12-1 is arranged at the axis of the reed 12, and a flow groove 12-2 is arranged around the axis hole 12-1 of the reed 12, an armature spring 13 is arranged on the spring seat 8, the upper part of the valve stem 10 passes through the axial through hole 8-1 of the spring seat 8 and extends into the axial hole of the armature 14, the upper part of the valve stem 10 and the bottom axial hole of the armature 14 are tightly fitted, the bottom surface of the armature 14 abuts against the top surface of the armature spring 13, the ball bracket 15 is fixed to the top of the armature 14, the axis of the ball bracket 15 is provided with an axial through hole that passes through the upper and lower ends of the ball bracket 15, and a steel ball 16 that constrains the radial displacement of the top of the armature 14 is arranged between the top surface of the armature 14 and the flange of the ball bracket 15,The clamping spring 17 is clamped in the clamping groove of the coil 1 and the clamping groove of the shell 2 to fix the coil 1 in the shell 2. A flow gap δ1 is provided between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the movable valve core 6. A flow gap δ2 is provided between the outer circle of the slider 9 and the slider mounting hole 8-2 in the spring seat 8. A flow gap δ3 is provided between the bottom surface of the valve stem 10 and the top surface of the reed 12. A flow gap δ4 is provided between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8. A flow gap δ5 is provided between the bottom surface of the slider 9 and the bottom surface of the valve stem 10. When the damping regulating valve is not energized, the elastic force of the armature spring 13 pushes the armature 1 upward. 4, the armature 14 drives the valve stem 10 and the slider 9 to move upward so that the top surface of the slider 9 abuts against the top surface of the flow groove 8-4 in the spring seat 8 and closes the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8, the axial throttling hole at the bottom of the moving valve core 6, the inner cavity of the moving valve core 6, the throttling hole 11-1 at the bottom of the inner valve seat 11, the central countersunk hole 11-2 at the top of the inner valve seat 11, the axial hole 12-1 of the reed 12, the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12, the flow gap δ5 between the bottom surface of the slider 9 and the bottom surface of the valve stem 10, the outer circle of the slider 9 and the slider mounting hole 8 in the spring seat 8 -2, the inner flow groove 8-4 inside the spring seat 8, the radial flow hole 8-6 connecting the inner and outer flow grooves of the spring seat 8, the outer flow groove 8-5 outside the spring seat 8, the radial flow holes connecting the inside and outside of the valve sleeve and the flow notch on the outer side of the outer valve seat 5 constitute the bypass regulating flow channel of the damping regulating valve. After the oil pressure in the axial hole of the outer valve seat 5 increases, the oil in the inner cavity of the moving valve core 6 leaks to the oil cavity at the bottom of the shell 2 through the bypass regulating flow channel. The throttling effect of the axial throttling hole at the bottom of the moving valve core 6 causes a pressure difference between the inner cavity of the moving valve core 6 and the bottom surface of the moving valve core 6. The axial force generated by the pressure difference acting on the moving valve core 6 overcomes the The elastic force of the moving valve core spring 7 pushes the moving valve core 6 upward to open the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6. The high-pressure oil in the axial hole of the outer valve seat 5 leaks from the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6 and the radial flow holes on the side of the outer valve seat 5 to the oil chamber at the bottom of the shell 2. Under this working condition, the damping of the bypass regulating flow channel of the damping regulating valve is in an intermediate damping state between the minimum damping and the maximum damping, and correspondingly, the damping of the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6 is in an intermediate damping state between the minimum damping and the maximum damping.

[0020] like Figure 2 As shown, a damping regulating valve is provided on its spring seat 8 with an axial through hole 8-1, a slider mounting hole 8-2 is provided inside the spring seat 8, a stopper 8-3 is provided at the lower end of the spring seat 8, an inner flow groove 8-4 is provided inside the spring seat 8, an outer flow groove 8-5 is provided outside the spring seat 8, a radial flow hole 8-6 connecting the inner and outer flow grooves is provided on the spring seat 8, and a countersunk hole 8-7 is provided on the top surface of the inner flow groove 8-4 of the spring seat 8.

[0021] like Figure 3As shown, a damping regulating valve is shown, in which the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12 increases and decreases with the increase of the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8, showing an opposite trend. After the damping regulating valve is energized, the electromagnetic force overcomes the elastic force of the armature spring 13 to drive the armature 14 to drive the valve stem 10 and the slider 9 to move downward, so that the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8 is opened, and at the same time, the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12 is reduced. The bypass regulating flow channel of the damping regulating valve is increased by the flow gap δ5 between the bottom surface of the slider 9 and the bottom surface of the valve stem 10, the flow hole penetrating the upper and lower end surfaces of the slider 9, and the spring seat 8 at the top of the slider 9. The countersunk hole 8-7 on the top surface of the flow groove 8-4, the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8 to the flow groove 8-4 in the spring seat 8 constitute an additional bypass regulating flow channel. After the damping regulating valve applies the minimum damping working current, the electromagnetic force overcomes the elastic force of the armature spring 13 to drive the armature 14 to drive the valve stem 10 and the slider 9 to move downward, and the flow cross-sectional area of ​​the additional flow channel of the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8 is opened, and the sum of the flow cross-sectional area of ​​the flow gap δ2 between the outer circle of the slider 9 and the slider mounting hole 8-2 in the spring seat 8 and the flow cross-sectional area of ​​the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12 is equal to make the bypass regulating valve of the damping regulating valve The damping of the throttling passage is minimal, and the damping of the oil in the inner cavity of the moving valve core 6 leaking to the oil cavity at the bottom of the housing 2 through the bypass regulating passage is minimal. The throttling effect of the axial throttling hole at the bottom of the moving valve core 6 maximizes the pressure difference between the inner cavity of the moving valve core 6 and the bottom surface of the moving valve core, and maximizes the pressure difference between the inner cavity and the bottom of the moving valve core 6. The axial force generated by the pressure difference between the inner cavity and the bottom of the moving valve core 6 overcomes the elastic force of the moving valve core spring 7 to push the moving valve core 6 upward and open the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6 to a fully open state. The damping of the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6 is in a minimum damping state, and the axial through hole passing through the upper and lower ends of the valve stem 10 and the axial through hole passing through the upper and lower ends of the ball bracket 15 are connected to the valve stem 1 0 bottom and the top of the ball bracket 15, the axial resultant force of the oil pressure on the valve stem 10 is always zero, thereby eliminating the back pressure resistance of the valve stem movement caused by the oil pressure. The damping regulating valve of the present invention only needs to apply a small working current to obtain the driving force required to overcome the oil pressure resistance to drive the valve stem to move downward. The small working current makes the coil inductance suppress the current change, and the current increase hysteresis from the beginning of power-on to the minimum damping working current is small. At the same time, the diameter of the countersunk hole 8-7 on the top surface of the flow groove 8-4 in the spring seat 8 is much larger than the valve stem shaft diameter of the current damping regulating valve, so that the slider 9 of the damping regulating valve of the present invention moves downward by a small stroke to obtain a sufficiently large flow cross-sectional area of ​​the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8.The small movement stroke makes the movement response hysteresis of the moving part small, the current rise hysteresis of the applied working current is small, and the movement response hysteresis of the moving part is small, so the energization operation response hysteresis of the damping regulating valve of the present invention is small.

[0022] like Figure 4As shown, a damping regulating valve, after the maximum working current is applied to the damping regulating valve, the electromagnetic force overcomes the elastic force of the armature spring 13 to drive the armature 14 to drive the valve stem 10 to move downward so that the bottom surface of the valve stem 10 is pressed on the top surface of the reed 12 to close the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12, and the oil in the inner cavity of the movable valve core 6 can only flow from the throttle hole 11-1 at the bottom of the inner valve seat 11, the central countersunk hole 11-2 at the top of the inner valve seat 11, the axial hole 12-1 of the reed 12, the axial through hole passing through the upper and lower ends of the valve stem 10, the axial through hole passing through the upper and lower ends of the ball bracket 15, the oil chamber at the top of the ball bracket 15, the gap between the valve sleeve 3 and the outer circle of the armature 14, the bottom of the armature 14 The bypass regulating flow channel formed by the oil chamber at the bottom of the housing 2, the sliding fit gap between the outer circle of the valve stem 10 and the axial through hole 8-1 of the spring seat 8, the countersunk hole 8-7 on the top surface of the flow groove 8-4 in the spring seat 8, the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8, the inner flow groove 8-4 inside the spring seat 8, the radial flow hole 8-6 connecting the inner and outer flow grooves of the spring seat 8, the outer flow groove 8-5 outside the spring seat 8, the radial flow holes connecting the inside and outside of the valve sleeve and the flow notch outside the outer valve seat 5, leaks to the oil chamber at the bottom of the housing 2, and the sliding fit gap between the outer circle of the valve stem 10 and the axial through hole 8-1 of the spring seat 8 is small, so that the bypass regulating flow channel of the damping regulating valve The damping of the flow channel is in the maximum damping state, the axial throttling hole at the bottom of the moving valve core 6 connects the inner cavity of the moving valve core 6 with the bottom of the moving valve core, so that the pressure difference between the oil pressure in the inner cavity of the moving valve core 6 and the oil pressure at the bottom of the moving valve core is small, and the downward axial force of the oil pressure on the moving valve core 6 is small. The downward thrust of the moving valve core spring 7 presses the bottom surface of the moving valve core 6 on the bottom surface of the inner cavity of the outer valve seat 5 and closes the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6. The high-pressure oil in the axial hole of the outer valve seat 5 cannot leak to the oil cavity at the bottom of the shell 2 through the flow gap δ1 between the bottom surface of the inner cavity of the outer valve seat 5 and the bottom surface of the moving valve core 6, so that the flow channel damping of the damping regulating valve is in the maximum damping state. When the inner cavity of the outer valve seat 5 is When the oil pressure produces an instantaneous jump fluctuation, the pressure wave is transmitted to the oil chamber at the top of the ball bracket 15 through the axial throttle hole at the bottom of the moving valve core 6, the inner cavity of the moving valve core 6, the throttle hole 11-1 at the bottom of the inner valve seat 11, the central countersunk hole 11-2 at the top of the inner valve seat 11, the axial hole 12-1 of the reed 12, the axial through hole passing through the upper and lower ends of the valve stem 10 and the axial through hole passing through the upper and lower ends of the ball bracket 15. When the pressure wave reaches the central countersunk hole 11-2 at the top of the inner valve seat 11, the pressure difference axial force generated between the bottom surface of the reed 12 and the top surface of the ball bracket 15 acts on the bottom surface of the reed 12, causing the middle part of the reed 12 to deform upward and open the gap between the bottom surface of the reed 12 and the top surface of the inner valve seat 11.The high-pressure oil in the central countersunk hole 11-2 at the top of the inner valve seat 11 flows out from the gap between the bottom surface of the open spring 12 and the top surface of the inner valve seat 11, the flow groove 11-3 at the top of the inner valve seat 11, the flow groove 12-2 of the spring 12, the flow gap δ5 between the bottom surface of the slider 9 and the bottom surface of the valve stem 10, the flow holes penetrating the upper and lower end surfaces of the slider 9, the flow gap δ4 between the top surface of the slider 9 and the top surface of the flow groove 8-4 in the spring seat 8, the inner flow groove 8-4 inside the spring seat 8, and the radial flow hole 8-6 connecting the inner and outer flow grooves of the spring seat 8. The bypass regulating flow channel formed by the external flow groove 8-5 outside the spring seat 8, the radial flow holes connecting the inside and outside of the valve sleeve and the flow notch outside the outer valve seat 5 leaks to the oil chamber at the bottom of the shell 2. The downward electromagnetic driving force acting on the valve stem 10 and the downward deformation elastic force generated by the upward deformation of the middle part of the reed 12 quickly reset the reed 12 and press it against the top surface of the inner valve seat 11 after the pressure difference axial force between the bottom surface of the reed 12 and the top surface of the ball bracket 15 is reduced. The surrounding of the reed 12 is fixed to constrain the upward deformation of the middle part of the reed 12. The amount of displacement of the valve stem 10 pressed against the top surface of the reed 12 due to the impact of the pressure wave is limited. The combined effect of the electromagnetic driving force and the deformation elastic force of the reed 12 makes the reed 12 reset with a small hysteresis. The aperture of the central countersunk hole 11-2 on the top of the inner valve seat 11 is the same as the axial diameter of the valve stem 10. The axial resultant force of the oil pressure on the valve stem 10 is zero, thereby eliminating the back pressure resistance of the valve stem movement caused by the oil pressure. The damping regulating valve can bypass the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12 with a small maximum working current. The bypass regulating flow channel is closed. When the power is turned off from the energized state, the small working current makes the coil inductance suppress the current change, and the hysteresis from the working current to zero is small. The elastic force of the armature spring 13 pushes the armature 14 upward to drive the valve stem 10 to move upward and open the flow gap δ3 between the bottom surface of the valve stem 10 and the top surface of the reed 12, thereby opening the bypass regulating flow channel of the damping regulating valve with small hysteresis, making the power-off response hysteresis of the damping regulating valve small. According to different working conditions, the corresponding solenoid valve working current can be applied to adjust and control the flow channel damping of the damping regulating valve.

[0023] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A damping regulating valve, characterized in that include: Coil, shell, valve sleeve, sealing ring, outer valve seat, moving valve core, moving valve core spring, spring seat, slider, valve stem, inner valve seat, reed, armature spring, armature, ball bracket, steel ball and retaining ring, wherein the coil is installed in the upper hole of the shell, the upper part of the valve sleeve passes through the axial hole of the shell and extends into the hole of the coil, a sealing ring installation groove is arranged on the outer side of the valve sleeve, the valve sleeve is provided with radial flow holes connecting the inside and outside of the valve sleeve, the sealing ring is installed in the sealing ring installation groove on the outer side of the valve sleeve, the outer valve seat is fixed to the bottom of the valve sleeve in a tight fit, and an axial through hole is arranged on the outer valve seat The outer valve seat is provided with a radial flow hole connecting the inner and outer sides of the outer valve seat, the outer side of the outer valve seat is provided with a flow notch, the moving valve core is installed in the outer valve seat, the axis of the bottom of the moving valve core is provided with a throttling hole, the moving valve core spring is installed in the inner cavity of the moving valve core, the spring seat is tightly fixed in the axial hole of the valve sleeve, the slider is installed in the slider mounting hole of the spring seat, the slider is provided with a flow hole penetrating the upper and lower end faces of the slider, the bottom of the valve stem is tightly fixed in the axial hole of the slider, the bottom of the valve stem is provided with a countersunk hole, and the axis of the valve stem is provided with an axial hole penetrating the upper and lower ends of the valve stem The inner valve seat and the reed are installed in the stopper at the lower end of the spring seat, the bottom surface of the reed abuts against the top surface of the inner valve seat, the axis of the reed is provided with a through hole, the outer periphery of the axis hole of the reed is provided with a flow groove, an armature spring is provided on the spring seat, the upper part of the valve stem passes through the axis through hole of the spring seat and extends into the axis hole of the armature, the upper part of the valve stem is tightly fitted with the bottom axis hole of the armature, the bottom surface of the armature abuts against the top surface of the armature spring, the ball bracket is fixed to the top of the armature, the axis of the ball bracket is provided with an axis through hole that passes through the upper and lower ends of the ball bracket, and the top surface of the armature and the A steel ball for constraining the radial displacement of the top of the armature is arranged between the flanges of the ball bracket, and the retaining spring is clamped in the clamping groove of the coil and the clamping groove of the outer shell to fix the coil in the outer shell, and an overflow gap δ1 is arranged between the bottom surface of the inner cavity of the outer valve seat and the bottom surface of the moving valve core, an overflow gap δ2 is arranged between the outer circle of the slider and the slider mounting hole in the spring seat, an overflow gap δ3 is arranged between the bottom surface of the valve stem and the top surface of the reed, an overflow gap δ4 is arranged between the top surface of the slider and the top surface of the overflow groove in the spring seat, and an overflow gap δ5 is arranged between the bottom surface of the slider and the bottom surface of the valve stem.

2. The damping regulating valve according to claim 1, characterized in that: The spring seat is provided with an axial through hole, a slider mounting hole is provided inside the spring seat, a stop is provided at the lower end of the spring seat, an inner flow groove is provided inside the spring seat, an outer flow groove is provided outside the spring seat, a radial flow hole connecting the inner and outer flow grooves is provided on the spring seat, and a countersunk hole is provided on the top surface of the inner flow groove of the spring seat.

3. The damping regulating valve according to claim 2, characterized in that: A throttling hole is arranged at the bottom of the inner valve seat, and a countersunk hole connected with the throttling hole at the bottom of the inner valve seat is arranged at the center of the top of the inner valve seat. The hole diameter of the central countersunk hole at the top of the inner valve seat is the same as the outer circle diameter of the valve stem installed in the axial through hole of the spring seat, and a flow groove is arranged around the central countersunk hole at the top of the inner valve seat.

4. The damping regulating valve according to claim 1, characterized in that: The flow gap between the bottom surface of the valve stem and the top surface of the reed is reduced as the flow gap between the top surface of the slider and the top surface of the flow groove in the spring seat increases.

5. The damping regulating valve according to claim 3, characterized in that: The axial throttle hole at the bottom of the moving valve core, the inner cavity of the moving valve core, the throttle hole at the bottom of the inner valve seat, the central countersunk hole on the top of the inner valve seat, the axial hole of the reed, the flow gap between the bottom surface of the valve stem and the top surface of the reed, the flow gap between the bottom surface of the slider and the bottom surface of the valve stem, the flow gap between the outer circle of the slider and the slider mounting hole in the spring seat, the inner flow groove inside the spring seat, the radial flow hole connecting the inner and outer flow grooves of the spring seat, the outer flow groove outside the spring seat, the radial flow holes connecting the inside and outside of the valve sleeve and the flow gap on the outside of the outer valve seat constitute the bypass regulating flow channel of the damping regulating valve.

6. The damping regulating valve according to claim 3, characterized in that: The flow gap between the bottom surface of the slider and the bottom surface of the valve stem, the flow hole penetrating the upper and lower end surfaces of the slider, the countersunk hole on the top surface of the flow groove in the spring seat at the top of the slider, and the flow gap between the top surface of the slider and the top surface of the flow groove in the spring seat to the flow groove in the spring seat constitute an additional bypass regulating flow channel.

7. The damping regulating valve according to claim 1, characterized in that: The slider and the valve stem are an integrated structure.

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