CN118257808A - High-speed switch valve pilot-controlled bidirectional damping regulating valve - Google Patents

Abstract

The invention provides a pilot-controlled bidirectional damping regulating valve of a high-speed switching valve, which comprises a shell, a limiting valve sleeve and a laminated valve assembly, wherein the laminated valve assembly comprises a laminated valve body, a valve plate group and a compression ring, an oil cavity I and an oil cavity II are respectively arranged at two sides of the laminated valve body in the shell, regulating valve assemblies are arranged at two ends of the shell, the regulating valve assembly comprises a regulating valve body, a control cavity I and a control cavity II, the control cavity I and the control cavity II are arranged in the regulating valve body, an inserting threaded hole is formed in the top end of the regulating valve body, and the high-speed switching valve is inserted in the inserting threaded hole. The invention is especially suitable for the application occasions of high flow of the hydro-pneumatic suspension, and has the advantages of compact structure, flexible control, quick response and the like.

Description

High-speed switch valve pilot-controlled bidirectional damping regulating valve

Technical Field

The invention relates to the technical field of damping adjusting elements of vehicle suspension systems, in particular to a pilot-controlled bidirectional damping adjusting valve of a high-speed switch valve.

Background

The hydro-pneumatic suspension is a kind of vehicle suspension system, which uses hydro-pneumatic spring as core, couples the elastic element and the vibration damping element into a whole, has ideal nonlinear characteristic and unique rigid locking characteristic, and is widely applied to engineering vehicles such as mining dump trucks and special vehicles. When the vehicle is excited by the road surface, the oil in the oil-gas suspension can flow back and forth in the oil cylinder, and damping force is generated under the action of the throttling effect of the damping hole, so that the vibration reduction function is realized. Because the damping holes of the traditional passive suspension system are relatively fixed and do not have damping adjustment function, the mining dump truck and the like often have poor smoothness when facing the working conditions of larger excitation of a road surface and frequent step change of dead weight, and the development of the mining dump truck towards the large-scale and intelligent direction is seriously restricted.

The prior art has the defects that:

(1) The Chinese patent No. 101871502B discloses an external mechanical induction type adjustable damping valve of an hydro-pneumatic suspension, which can adaptively adjust the damping state of the hydro-pneumatic suspension according to road surface excitation, but the design scheme of mechanical induction limits that the hydro-pneumatic suspension cannot apply semi-active or active control strategies, and restricts the further improvement of the performance of a hydro-pneumatic suspension system.

(2) The invention patent CN113251177B discloses a flow control valve, a vehicle suspension shock absorber assembly and a vehicle suspension system, wherein the on-off of oil in each damping channel is controlled by controlling the on-off of a high-speed switch valve; however, in this solution, the high-speed switching valve is a key link in the damping channel, and the small flow characteristic limits that this solution cannot be directly applied to such a high-flow occasion as an oil-gas suspension, and a large number of high-speed switching valves must be combined in parallel to solve the problem, which results in a larger volume and a more complex structure of the damping element of the suspension system.

Disclosure of Invention

The invention aims to provide a pilot-controlled bidirectional damping regulating valve of a high-speed switch valve, which is suitable for high-flow oil-gas suspension systems such as mining dump trucks.

In order to achieve the aim of the invention, the invention adopts the technical scheme that: the utility model provides a high-speed switch valve pilot control's two-way damping control valve, includes the casing, shells inner wall both sides fixedly connected with limit valve sleeve, the inside folded valve subassembly that is provided with of casing, folded valve subassembly includes folded valve body, valve block group and clamp ring, folded valve body sets up in the inside intermediate position of casing, valve block group sets up in folded valve body both ends, the clamp ring sets up in valve block group opposite side, the inside in folded valve body both sides that lie in of casing are provided with fluid chamber one and fluid chamber two respectively, the casing both ends are provided with the governing valve subassembly according to folded valve subassembly symmetric distribution, governing valve subassembly includes governing valve body, control chamber one and control chamber two sets up in the governing valve body inside, the cartridge screw hole has been seted up on the governing valve body top, the inside upper end of governing valve body has been seted up with fluid chamber one, fluid chamber two and cartridge screw hole intercommunication first oilhole, the second oilhole with control chamber two intercommunication, the inside high-speed switch has the first and fluid chamber two, the inside conical damping surface is seted up to the mesa, the conical damping surface is all set up to the inside the mesa, the conical damping surface is all has been opened to the inside the mesa, the damping surface is all to have been opened to the conical damping surface.

Further, the back wall and the front wall of the shell are internally provided with a third L-shaped oil hole and a fourth oil hole respectively, one end of the third oil hole is communicated with the first oil cavity, one end of the fourth oil hole is communicated with the second oil cavity, the front side of the first control cavity and the rear side of the second control cavity are both provided with a fifth L-shaped oil hole communicated with the third oil hole and the fourth oil hole, and the fifth oil hole is arranged in the valve body of the regulating valve.

Further, the second damping holes are arranged on one side of the first damping holes in a staggered mode, U-shaped diversion grooves are formed in one end, away from the second damping holes, of the first damping holes, and the U-shaped diversion grooves are uniformly formed in two ends of the valve body of the laminated valve.

Further, annular sealing grooves are formed in two sides of the outer portion of the laminated valve body in a clamping mode, and sealing ring structures sleeved on the laminated valve body are arranged in the sealing grooves.

Further, the regulating valve body comprises a regulating nut and a regulating valve core which are arranged in the regulating valve body, the regulating nut is in threaded connection with one side of the inside of the regulating valve body, the regulating valve core is arranged in the first control cavity and the second control cavity, one end, close to the regulating nut, of the regulating valve core is of an slender shaft structure, and a counter bore structure matched with the slender shaft structure of the regulating valve core is formed in the regulating nut.

Further, an adjusting spring is sleeved on the slender shaft structure of the valve core of the adjusting valve, a conical annular concave structure sleeved on the conical table top is arranged at one end, far away from the slender shaft structure, of the valve core of the adjusting valve, and a compression spring sleeved on the conical table top is arranged between the valve core of the adjusting valve and the compression ring.

Further, an oil port I and an oil port II are respectively formed in two sides of the bottom of the shell, and the oil port I and the oil port II are respectively communicated with the interior of the oil cavity I and the interior of the oil cavity II.

Further, the inside fixedly connected with check valve of ladder counter bore, the check valve is from lamination valve body outside to inside when stopping, the check valve switches on from lamination valve body inside to outside.

Further, the high-speed switch valve is two-position two-way normally closed, the high-speed switch valve is respectively provided with an oil outlet and an oil inlet, the oil outlet of the high-speed switch valve is communicated with the first oil hole, and the oil inlet of the high-speed switch valve is communicated with the second oil hole.

Further, the on-off control signal of the high-speed switch valve is a pulse width modulation signal.

Compared with the prior art, the invention has the beneficial effects that:

(1) The invention fully plays the high-frequency response control advantage of the high-speed switching valve, breaks through the bottleneck of small flow rate of the high-speed switching valve serving as a damping adjusting element, takes the high-speed switching valve as a pilot control element, takes the pressure difference in the valve cavity generated by road surface excitation as internal power to drive the valve core of the adjusting valve to move, is especially suitable for the application occasion of large flow rate of the oil-gas suspension, and has the characteristics of compact structure, quick response and the like.

(2) According to the invention, the on-off state of the high-speed switch valve is adjusted by changing the duty ratio of the control signal, so that the size of the oil flow area in the damping adjusting valve is controlled, the continuous adjustment of compression and restoration double-stroke damping of the suspension system can be realized, the control is flexible, and the control strategy can be matched with various semi-active suspension system control strategies.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional H-H view of an embodiment of the present invention.

Fig. 3 is a three-dimensional partial cross-sectional view of a laminated valve body according to an embodiment of the present invention.

Fig. 4 is a three-dimensional partial cross-sectional view of an embodiment of the present invention.

Fig. 5 is a schematic diagram of an oil flow path in a damping control valve in an initial position of a valve element of the control valve according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of an oil flow path in a damping control valve in a fully open position of a valve element of the control valve according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of an installation mode of an oil-gas suspension cylinder according to an embodiment of the invention.

Wherein, the reference numerals are as follows: 1. a housing; 2. a limit valve sleeve; 3. a laminated valve assembly; 4. a laminated valve body; 5. a valve block group; 6. a clamp ring; 7. an oil cavity I; 71. an oil cavity II; 8. a regulator valve assembly; 9. a regulating valve body; 10. a first control cavity; 101. a second control cavity; 11. inserting a threaded hole; 12. a first oil hole; 13. a second oil hole; 14. a third oil hole; 141. a fourth oil hole; 15. a fifth oil hole; 16. a conical mesa; 17. step counter bore; 18. a first damping hole; 19. a second damping hole; 20. a third damping hole; 21. u-shaped diversion trenches; 22. sealing grooves; 23. an adjusting nut; 24. a valve core of the regulating valve; 25. an adjusting spring; 26. a compression spring; 27. an oil port I; 28. an oil port II; 29. a one-way valve; 30. a high speed switch valve.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. Of course, the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

Referring to fig. 1 and 3, the present embodiment provides a pilot-controlled bidirectional damping control valve for a high-speed switch valve, which mainly includes a housing 1, a limiting valve sleeve 2, a laminated valve assembly 3, a control valve assembly 8 and a sealing related structure, the laminated valve assembly 3 includes a laminated valve body 4, and a valve plate group 5, a compression ring 6 and a compression spring 26 symmetrically disposed on two sides of the laminated valve body, the integral structure of the laminated valve body 4 is a shaft disk structure, two ends of the integral structure are fixedly connected with a conical table top 16, a stepped counter bore 17 with two ends not mutually communicated is formed in the conical table top 16, a one-way valve 29 is fixedly disposed in the stepped counter bore 17, oil is conducted when flowing from the inside of the laminated valve body 4 to the outside of the laminated valve body 4 through the one-way valve 29, and is cut off when flowing from the outside of the laminated valve body 4 to the inside of the laminated valve body through the one-way valve 29. The inner part of the middle disc body of the laminated valve body 4 is provided with uniformly distributed transverse first damping holes 18, the first damping holes 18 are mainly connected with two outer sides of the laminated valve body 4, the inner part of the laminated valve body is provided with second damping holes 19 communicated with the first damping holes 18, the second damping holes 19 are communicated with the outer part of the laminated valve body 4 and the stepped counter bores 17, the number of the arranged first damping holes 18 is six, each first damping hole 18 is provided with one second damping hole 19 communicated with the first damping hole, the second damping holes 19 are distributed on two sides in a staggered manner, two end faces of the laminated valve body 4 are respectively provided with three U-shaped guide grooves 21 connected with the first damping holes 18, the U-shaped guide grooves 21 on two sides are distributed in a staggered manner, and the conical table top 16 is provided with cross-shaped third damping holes 20 communicated with the outer part of the laminated valve body and the inside of the stepped counter bores 17.

The valve block group 5 is fixedly arranged at two ends of the laminated valve body 4, the compression ring 6 is arranged at one end of the valve block group 5 away from the laminated valve body 4, the valve block group 5 and the compression ring 6 are sleeved on conical table tops 16 at two sides, meanwhile, the compression spring 26 is arranged at one side of the compression ring 6, the valve block group 5 is only attached to two ends of the laminated valve body 4 under the combined action of the compression spring 26 and the compression ring 6, in addition, two ends of the laminated valve body 4 are embedded and fixed in the middle of an inner cavity of the shell 1 under the action of limiting valve sleeves 2 at two sides, in order to ensure the sealing between the laminated valve body 4 and the shell 1, annular sealing grooves 22 are formed at two sides outside the laminated valve body 4, two groups of O-shaped sealing strips can be installed inside the annular sealing grooves 22 to realize sealing effect, and the limiting valve sleeves 2 and the shell 1 are in interference fit.

Example 2

On the basis of embodiment 1, as shown in fig. 1 and 2, the adjusting valve comprises adjusting valve assemblies 8 arranged on two sides of a shell 1, wherein the adjusting valve assemblies 8 are symmetrically nested at two ends of the shell 1 according to a middle laminated valve body 4, and are fixedly connected with the shell 1 through four groups of hexagon socket head cap screws, and meanwhile, in order to increase the sealing effect, a group of O-shaped sealing ring structures are arranged between the adjusting valve assemblies 8 and the end faces of the shell 1 and the limiting valve sleeve 2 for reinforcing and sealing.

The adjusting valve assembly 8 comprises an adjusting valve body 9 fixedly connected to two ends of the shell 1, a first control cavity 10 and a second control cavity 101 are arranged in the adjusting valve body 9, the first control cavity 10, the second control cavity 101 and the adjusting valve body 9 are of annular structures, the first control cavity 10, the second control cavity 101, the adjusting valve body 9 and the axis of the laminated valve assembly 3 are overlapped, an adjusting valve core 24 is arranged in the first control cavity 10 and the second control cavity 101, the adjusting valve core 24 can transversely slide in the first control cavity 10 and the second control cavity 101, one end of the adjusting valve core 24 is of an slender shaft structure, an adjusting nut 23 is arranged at one end of the adjusting valve body 9 in a threaded connection mode, a conical annular groove structure matched with the conical table top 16 is formed at the other end of the adjusting valve core 24, an adjusting spring 25 is arranged between the adjusting valve core 24 and the adjusting nut 23, and the precompression amount of the adjusting spring 25 can be adjusted through the adjusting nut 23, and different pretightening forces are formed.

Example 3

On the basis of embodiment 2, a plug-in threaded hole 11 is formed in the top of the regulating valve body 9, the plug-in threaded hole 11 is used for connecting and installing a high-speed switch valve 30, an oil inlet and an oil outlet are formed in the high-speed switch valve 30, the oil inlet is formed in the bottom of the high-speed switch valve, a second oil hole 13 is formed in the bottom of the plug-in threaded hole 11 and is communicated with a first control cavity 10 and a second control cavity 101, the oil inlet at the bottom of the high-speed switch valve 30 is further connected with the first control cavity 10 and the second control cavity 101, a first oil hole 12 which is communicated with the first oil cavity 7, the second oil cavity 71 and the oil outlet of the high-speed switch valve 30 is formed in the regulating valve body 9, the high-speed switch valve 30 is in the shape of a two-position two-way normally-closed type, the first oil cavity 7 and the second oil cavity 71 are divided by a middle laminated valve assembly 3, an oil port 27 and an oil port 28 are formed in two sides of the bottom of the casing 1, and the oil port 7 and the oil port 28 are communicated with the outside of the whole damping regulating valve.

On the basis of the above, the rear wall and the front wall of the shell 1 are respectively provided with the L-shaped third oil hole 14 and the L-shaped fourth oil hole 141, the front side and the rear side of the third oil hole 14 and the fourth oil hole 141 are respectively connected to the inner parts of the first oil cavity 7 and the second oil cavity 71 on the two sides, and the corresponding regulating valve body 9 on the two sides is respectively provided with the fifth oil hole 15 matched with the third oil hole 14 and the fourth oil hole 141 in the inner part, so that oil passages which are completely communicated with the first oil cavity 7 and the second control cavity 101 and the second oil cavity 71 and the first control cavity 10 can be formed on the two sides.

In addition, in the use process, a plate type connection mode is adopted, as shown in fig. 7, the plate type connection mode is used, the plate type connection mode is fixedly installed with an oil cylinder in an oil-gas suspension system through four groups of hexagon socket head cap screws, an oil port I27 is communicated with an oil port communicated with a rodless cavity on the oil cylinder, an oil port II 28 is communicated with an oil port communicated with a rod cavity on the oil cylinder, and the oil port I27 and the oil port II 28 are sealed through O-shaped sealing rings.

Referring to fig. 5 and 6, the working principle of the pilot-controlled bidirectional damping control valve of the high-speed switch valve of the invention is as follows:

When the hydro-pneumatic suspension system is positioned on a stable road surface and is not excited by the road surface, the pressure of the rod cavity and the rodless cavity of the hydro-cylinder of the suspension system is the same, and at the moment, oil does not flow, and the damping regulating valve is in a non-working state.

When the hydro-pneumatic suspension system is positioned on a bumpy road surface and excited by the road surface, the rod cavity and the rodless cavity of the suspension system cylinder can generate pressure difference under the action of external excitation. Taking the compression stroke as an example (the pressure of the rodless cavity is higher than that of the oil cylinder cavity), at the moment, oil flows into the damping adjustment valve from the first oil port 27, flows out of the damping adjustment valve from the second oil port 28, a second control cavity 101 communicated with the first oil cavity 7 in the damping adjustment valve is a high-pressure cavity, and a first control cavity 10 communicated with the second oil cavity 71 in the damping adjustment valve is a low-pressure cavity. When the pilot control element high-speed switching valve 30 does not apply a PWM control signal (the duty ratio of the PWM control signal is 0), high-pressure oil in the first oil cavity 7 can only flow into the second oil cavity 71 through the U-shaped diversion trench 21 and the first damping hole 18, and the first damping channel is the first damping channel; when the pilot control element high-speed switching valve 30 applies a PWM control signal (the duty ratio of the PWM control signal is not 0), the high-frequency on-off of the high-speed switching valve causes the second control chamber 101 to be conducted with the second oil chamber 71, the valve core 24 of the regulating valve in the second control chamber 101 moves towards the regulating nut 23 under the combined action of hydraulic force and spring force, the third damping hole 20 is conducted, and at this time, the high-pressure oil in the first oil chamber 7 can flow into the second oil chamber 71 through the U-shaped guiding groove 21, the first damping hole 18, the second damping hole 19, the one-way valve 29, the stepped counter bore 17, the third damping hole 20, and the gap between the conical table top 16 and the conical annular concave surface, which is the second damping channel. The opening degree of the valve core 24 of the regulating valve can be changed according to the road surface excitation level to control the duty ratio (0-100%) of the PWM control signal so as to form different flow areas, thereby realizing the continuous regulation of the damping force of the suspension system. The return stroke damping force adjustment process is similar to the compression stroke and will not be described again here.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The utility model provides a high-speed switch valve pilot control's two-way damping governing valve, its characterized in that, including casing (1), casing (1) inner wall both sides fixedly connected with limit valve cover (2), casing (1) inside is provided with fold valve subassembly (3), fold valve subassembly (3) including fold valve body (4), valve block group (5) and clamp ring (6), laminate valve body (4) set up in casing (1) inside intermediate position, valve block group (5) set up in fold valve body (4) both ends, clamp ring (6) set up in valve block group (5) opposite side, casing (1) inside is located laminate valve body (4) both sides and is provided with fluid chamber one (7) and fluid chamber two (71) respectively, casing (1) both ends are provided with adjusting valve subassembly (8) according to fold subassembly (3) symmetric distribution, adjusting valve subassembly (8) include adjusting valve body (9), control chamber one (10) and control chamber two (101) set up in folding valve body (9) inside, the top is equipped with in adjusting valve body (9) tip, valve body (9) are opened to the top is equipped with in adjusting valve body (9) inside, valve body (9) top end and valve body (11) are opened The hydraulic control device comprises an oil cavity II (71) and a first oil hole (12) communicated with an inserting threaded hole (11), wherein a second oil hole (13) communicated with a first control cavity (10) and a second control cavity II (101) is formed in the bottom of the inserting threaded hole (11), a high-speed switch valve (30) is inserted into the inserting threaded hole (11), conical table tops (16) are arranged at two ends of a laminated valve body (4), stepped counter bores (17) are formed in the conical table tops (16), six first damping holes (18) which are transversely and uniformly distributed are formed in the laminated valve body (4), second damping holes (19) which are communicated with the first damping holes (18) are formed in the laminated valve body (4), and third damping holes (20) are formed in the top surface, the bottom surface and the front and the back of the conical table tops (16).

2. The pilot-controlled bidirectional damping control valve of claim 1, wherein an L-shaped third oil hole (14) and a L-shaped fourth oil hole (141) are respectively formed in the rear wall and the front wall of the housing (1), one end of the third oil hole (14) is communicated with the first oil cavity (7), one end of the fourth oil hole (141) is communicated with the second oil cavity (71), an L-shaped fifth oil hole (15) communicated with the third oil hole (14) and the fourth oil hole (141) is formed in the front side of the first control cavity (10) and the rear side of the second control cavity (101), and the fifth oil hole (15) is formed in the valve body (9) of the control valve.

3. The pilot-controlled bidirectional damping control valve of the high-speed switching valve according to claim 1, wherein the second damping holes (19) are staggered on one side of the first damping holes (18), one end, far away from the second damping holes (19), of the first damping holes (18) is provided with a U-shaped guide groove (21), and the U-shaped guide groove (21) is uniformly formed in two ends of the valve body (4) of the laminated valve.

4. The pilot-controlled bidirectional damping control valve of the high-speed switching valve according to claim 1, wherein an annular sealing groove (22) is arranged outside the laminated valve body (4), and a sealing ring structure sleeved on the laminated valve body (4) is arranged inside the sealing groove (22).

5. The pilot-controlled bidirectional damping control valve of the high-speed switching valve according to claim 1, wherein the control valve body (9) comprises a control nut (23) and a control valve core (24) which are arranged in the control valve body (9), the control nut (23) is in threaded connection with one side of the interior of the control valve body (9), the control valve core (24) is arranged in a first control cavity (10) and a second control cavity (101), one end, close to the control nut (23), of the control valve core (24) is of an slender shaft structure, and a counter bore structure matched with the slender shaft structure of the control valve core (24) is formed in the control nut (23).

6. The pilot-controlled bidirectional damping control valve of the high-speed switch valve according to claim 4, wherein the adjusting spring (25) is sleeved on the slender shaft structure of the valve core (24), a conical annular concave structure sleeved on the conical table top (16) is arranged at one end of the valve core (24) far away from the slender shaft structure, and a compression spring (26) sleeved on the conical table top (16) is arranged between the valve core (24) and the compression ring (6).

7. The pilot-controlled bidirectional damping control valve of claim 1, wherein an oil port I (27) and an oil port II (28) are respectively formed on two sides of the bottom of the shell (1), and the oil port I (27) and the oil port II (28) are respectively communicated with the interior of the oil cavity I (7) and the interior of the oil cavity II (71).

8. The pilot-controlled bidirectional damping control valve of the high-speed switching valve according to claim 1, wherein a one-way valve (29) is fixedly connected inside the stepped counter bore (17), the one-way valve (29) is closed from the outside to the inside of the laminated valve body (4), and the one-way valve (29) is communicated from the inside to the outside of the laminated valve body (4).

9. The pilot-controlled bidirectional damping control valve of the high-speed switching valve according to claim 1, wherein the high-speed switching valve (30) is a two-position two-way normally-closed valve, an oil outlet and an oil inlet are respectively arranged on the high-speed switching valve (30), the oil outlet of the high-speed switching valve (30) is communicated with the first oil hole (12), and the oil inlet of the high-speed switching valve (30) is communicated with the second oil hole (13).

10. The high-speed switching valve pilot-controlled bi-directional damping control valve according to claim 1, characterized in that the on-off control signal of the high-speed switching valve (30) is a pulse width modulation signal.