CN117329259A - Damping valve group of bending-preventing system and adjusting method thereof - Google Patents
Damping valve group of bending-preventing system and adjusting method thereof Download PDFInfo
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- CN117329259A CN117329259A CN202311241280.0A CN202311241280A CN117329259A CN 117329259 A CN117329259 A CN 117329259A CN 202311241280 A CN202311241280 A CN 202311241280A CN 117329259 A CN117329259 A CN 117329259A
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- valve
- damping
- oil
- oil duct
- pressure limiting
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- 238000013016 damping Methods 0.000 title claims abstract description 214
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 37
- 230000002265 prevention Effects 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000001502 supplementing effect Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 32
- 230000006835 compression Effects 0.000 claims description 29
- 238000007906 compression Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
- B61F5/44—Adjustment controlled by movements of vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/22—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger
- F16F9/28—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger with two parallel cylinders and with the two pistons or plungers connected together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
- F16K15/065—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring spring pulling the closure member against the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/18—Control arrangements
Abstract
The damping valve group of the bending prevention system comprises four damping units, wherein an upper cavity and a lower cavity of a control oil cylinder are respectively communicated with one damping unit, the outer end of each damping unit is communicated with the control oil cylinder, the inner end of each damping unit is communicated with a main control valve group in the bending prevention system, each damping unit is arranged in a valve block provided with an oil duct, each damping unit comprises a one-way valve for supplementing oil to the control oil cylinder, a damping valve for providing damping force for the movement of the control oil cylinder and a pressure limiting valve for limiting the maximum damping force of the control oil cylinder, the damping valves, the one-way valves and the pressure limiting valves are all detachably arranged in the oil duct of the valve block and form parallel connection through the oil duct, and the damping unit communicated with the upper cavity of one control oil cylinder is communicated with the damping unit communicated with the lower cavity of the other control oil cylinder through the oil duct to form inner end communication. The invention meets the transverse damping requirements of trains with different lines and different running conditions and improves the practicability. The invention further provides an adjusting method of the damping valve group of the bending prevention system.
Description
Technical Field
The invention relates to a damping valve group of an anti-bending system and an adjusting method thereof, and belongs to the technical field of anti-bending systems of energy storage trams.
Background
The low-floor tramcar is a rail transportation system capable of replacing subways and light rails in cities, and is favored by users because construction investment and operation cost are lower than those of subways and light rails. The bending prevention system is an important safe operation control system of the energy storage type tramcar, not only can control the movement limit of each module when a train passes through a curve, but also can provide a good transverse vibration reduction function for the train, and the energy storage type tramcar with different structures and operation conditions has different transverse damping forces. The low-floor tramcar comprises a main control valve group, a damping valve group, a buffer cylinder, an auxiliary valve group and two sets of hydraulic pipelines, wherein each lower part of each car body of the low-floor tramcar is provided with only one bogie, and every two bogies share one set of interconnected hydraulic system, namely an anti-bending system. The control oil cylinder has a vibration reduction function and can replace a transverse vibration absorber, the damping force of the control oil cylinder is mainly regulated through a damping valve group, one end of the damping valve group is communicated with the control oil cylinder, and the other end of the damping valve group is communicated with the master control valve group. The control oil cylinders are transversely and symmetrically arranged between the vehicle body and the bogie. When the vehicle passes through the curve, the control oil cylinder on one side stretches, and the control oil cylinder on the other side compresses; the pulling and pressing conditions of the control oil cylinder are opposite when the control oil cylinder passes through a reverse curve. The damping valves of the bending prevention system are used as important damping providing units of the bending prevention system, the differences of the performance parameters of the damping valves directly affect the running stability and the comfort of a train, the differences of the structures and the adjusting methods of the damping valves directly affect the manufacturing and the running cost of the bending prevention system, and the damping valves of the existing bending prevention system have the following defects:
1. due to the fact that the running speed of the train, the structure of the suspension system, road conditions of the train and other factors are different, different damping parameters are required by different trains, and the transverse damping requirements of trains with different running working conditions cannot be met by the bending-preventing system damping valve group with a single structure.
2. The mounting structure of damping valves is complicated, changes, adjusts the difficulty, and the inside UNICOM of damping valves and the connection with control cylinder and master control valves all realize through oil pipe, and connection structure is complicated, and the work load of maintenance is great.
3. The sealing performance of each valve element in the damping valve group is not high, and the service life and the damping reliability are affected.
Disclosure of Invention
The damping valve group of the bending-preventing system provided by the invention forms the modularized installation of the damping units, and the check valve, the damping valve and the pressure limiting valve can be independently replaced and adjusted, so that the damping characteristics of the damping valve group can be adjusted according to the transverse damping requirements of trains, the transverse damping requirements of trains with different circuits and different operation conditions can be met, the practicability is improved, an oil duct is arranged in a valve block for communicating the damping units, communicating each valve element in the damping units and communicating the damping units with a control oil cylinder and a main control valve group, the connection structure and the installation structure of the damping valve group are simplified, the overhaul and maintenance of the damping valve group are facilitated, the service life of the damping valve group is prolonged, and the damping reliability is improved. The invention further provides an adjusting method of the damping valve group of the bending prevention system.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the damping valves of the bending prevention system are connected between two control cylinders which are transversely symmetrically arranged in the bending prevention system, the damping valves comprise four damping units, an upper cavity and a lower cavity of each control cylinder are respectively communicated with one damping unit, the outer ends of the damping units are communicated with the control cylinders, and the inner ends of the damping units are communicated with a main control valve group in the bending prevention system, and the damping valve group is characterized in that: the damping unit is arranged in a valve block provided with an oil duct, the damping unit comprises a one-way valve for supplementing oil to the control oil cylinder, a damping valve for providing damping force for the movement of the control oil cylinder and a pressure limiting valve for limiting the maximum damping force of the control oil cylinder, the damping valve, the one-way valve and the pressure limiting valve are all detachably arranged in the oil duct of the valve block and are connected in parallel through the oil duct, and the damping unit communicated with the upper cavity of one control oil cylinder and the damping unit communicated with the lower cavity of the other control oil cylinder form inner end communication through the oil duct.
Preferably, the opening direction of the one-way valve is outwards, and the one-way valve is jacked up by oil along with the pressure reduction of the cavity in the control oil cylinder, so that the oil in the main control valve group outwards flows into the cavity with the reduced pressure of the control oil cylinder through the one-way valve; the opening direction of the pressure limiting valve is inward, and the pressure limiting valve is pushed open by oil along with the pressure increase of the cavity in the control oil cylinder, so that the oil flows out of the cavity with the pressure increase of the control oil cylinder and flows into the main control valve group through the pressure limiting valve.
Preferably, the one-way valve comprises a valve body screwed into the oil duct in a threaded mode, a valve seat coaxially in interference press connection with the valve body and pressed on the valve block by the valve body, a lifting valve core coaxially arranged between the valve body and the valve seat, and a compression spring clamped between the lifting valve core and the valve body, wherein the lifting valve core is in guide fit with the valve body, the compression spring pushes the lifting valve core to be in seal fit with the valve seat to seal the oil duct, the lifting valve core is separated from the valve seat along with the pushing of oil, and the valve seat is communicated with the valve body to conduct the oil duct.
Preferably, the valve body is provided with a guide groove for guiding and matching the lifting valve core to extend in, the lifting valve core is provided with a valve core groove coaxially communicated with the guide groove, one end of the compression spring extends into the guide groove, the other end of the compression spring extends into the valve core groove, the valve body is provided with an oil passing through hole positioned at the periphery of the guide groove, and the oil passing through hole is communicated with an inner hole of the valve seat along with the separation of the lifting valve core and the valve seat to conduct an oil duct.
Preferably, the bottom of the lifting valve core is provided with a sealing conical surface, the end face of the inner hole of the valve seat is provided with a matching conical surface in sealing fit contact with the sealing conical surface, and the sealing conical surface is tightly attached to the matching conical surface to seal the oil duct.
Preferably, the damping valve is screwed in an oil duct in the valve block in a threaded fit manner, an inner hexagonal groove coaxially aligned with the oil duct is formed in the damping valve, a damping small hole communicating the oil duct with the inner hexagonal groove is formed in the bottom of the damping valve, an annular positioning surface of the damping valve for positioning the damping valve is formed in the oil duct, and the bottom surface of the damping valve is a conical sealing surface in contact with the edge of the annular positioning surface of the damping valve.
Preferably, the pressure limiting valve comprises a valve sleeve, a pressure limiting valve core and an adjusting screw, wherein the valve sleeve is pressed in an oil duct in an interference manner, the pressure limiting valve core is in clearance fit and stretches into the valve sleeve, the adjusting screw is in threaded fit and stretches into the oil duct and is coaxially aligned with the pressure limiting valve core, the adjusting spring is clamped between the adjusting screw and the pressure limiting valve core, the adjusting spring pushes the pressure limiting valve core to be pressed on the end face of the valve sleeve to seal the oil duct, and the pressure limiting valve core moves towards one side of the adjusting screw along with the pushing of oil liquid to compress the adjusting spring, and the oil duct is conducted.
Preferably, the pressure limiting valve core is formed by integrally forming an oil passing section which is inserted into the valve sleeve in a clearance fit manner, a conical section which is tightly pressed on the end face of the valve sleeve and is used for plugging an oil duct and a T-shaped section which is in contact with the adjusting spring in a coaxial manner, the cross section of the oil passing section is in a concave three-flap shape, a plurality of oil passing channels which are axially arranged are formed between the oil passing section and the valve sleeve, and one end of the adjusting spring is sleeved on the T-shaped section and the end face of the adjusting spring is propped against the T-shaped section.
Preferably, one end of the adjusting screw extends out of the valve block and is sleeved with a self-locking nut in threaded fit with the adjusting screw, and the inner end of the self-locking nut is provided with a sealing nest which is pressed on the valve block to seal the oil duct.
The adjusting method of the damping valve group of the bending prevention system is characterized by comprising the following steps of: according to the transverse damping requirement of the train, the check valve, the damping valve and/or the pressure limiting valve in the damping unit are replaced or the opening rigidity of the check valve and/or the pressure limiting valve in the damping unit is adjusted so as to adjust the damping characteristic of the damping valve group of the bending prevention system, so that the movement of the control oil cylinder in the running process of the train can meet the requirement of transverse vibration reduction of the train body.
The invention has the beneficial effects that:
according to the damping valve group of the bending prevention system, the damping units are arranged in the valve blocks, the oil channels are formed in the valve blocks, the check valves, the damping valves and the pressure limiting valves in the damping units are all detachably arranged in the oil channels of the valve blocks, the damping units are installed in a modularized mode, the check valves, the damping valves and the pressure limiting valves can be independently replaced and adjusted, so that the damping characteristics of the damping valve group can be adjusted according to the transverse damping requirements of trains, the transverse damping requirements of trains with different circuits and different operation conditions are met, the practicability is improved, the oil channels are formed in the valve blocks and are used for communication among the damping units, communication among all valve members in the damping units and communication among the damping units, the control oil cylinders and the master control valve group, the connection structure and the installation structure of the damping valve group are simplified, the maintenance of the damping valve group is facilitated, the service life of the damping valve group is prolonged, and the damping reliability is improved.
The check valve, the damping valve and the pressure limiting valve are positioned in the oil duct in a threaded fit mode, the installation structure is simple, the replacement and adjustment are easy, the check valve is used for blocking the oil duct through the fit of the sealing conical surface and the matching conical surface, the flow rate is high when the check valve is opened in the forward direction, the pressure drop is small, the oil supplementing efficiency of the control oil cylinder is high after the check valve is opened, and the sealing performance is high when the check valve is closed in the reverse direction; the screw thread fit of adjusting screw and oil duct in the pressure limiting valve conveniently adjusts adjusting spring's initial compression to adjust pressure limiting valve's opening rigidity, with the biggest damping force of regulation control cylinder, pressure limiting valve core and valve pocket's cooperation makes the forward throughflow that opens of pressure limiting valve big, and pressure drop is little, and release reliability and timeliness are high, and sealing performance when the reverse closure of pressure limiting valve is guaranteed in the cooperation of toper section and valve pocket terminal surface improves damping valves's reliability, extension its life.
Drawings
Fig. 1 is a schematic installation view of a damping valve set of an anti-bending system in an embodiment.
FIG. 2 is a schematic view of a damping unit within a valve block.
FIG. 3 is a cross-sectional view of the check valve and pressure limiting valve housed within a valve block.
Fig. 4 is a partial view of the check valve, damper valve and pressure limiting valve housed within the valve block.
Fig. 5 is a schematic view of a pressure limiting spool.
Fig. 6 is a schematic cross-sectional view of the oil passage section.
Fig. 7 is a cross-sectional view of the self-locking nut.
Fig. 8 is a cross-sectional view of the damping valve.
Fig. 9 is a cross-sectional view of the one-way valve.
Fig. 10 is a cross-sectional view of a poppet.
Detailed Description
The following describes embodiments of the present invention in detail with reference to fig. 1 to 10.
The damping valves of the bending prevention system are connected between two control cylinders 1 which are transversely symmetrically arranged in the bending prevention system and comprise four damping units 2, an upper cavity and a lower cavity of each control cylinder 1 are respectively communicated with one damping unit 2, the outer ends of the damping units 2 are communicated with the control cylinders 1, and the inner ends of the damping units are communicated with a main control valve group 3 in the bending prevention system, and the damping valve group is characterized in that: the damping unit 2 is arranged in a valve block 5 provided with an oil duct 4, the damping unit 2 comprises a one-way valve 6 for supplementing oil to the control oil cylinder 1, a damping valve 7 for providing damping force for the movement of the control oil cylinder 1 and a pressure limiting valve 8 for limiting the maximum damping force of the control oil cylinder 1, the damping valve 7, the one-way valve 6 and the pressure limiting valve 8 are all detachably arranged in the oil duct 4 of the valve block 5 and are connected in parallel through the oil duct 4, and the damping unit 2 communicated with the upper cavity of one control oil cylinder 1 and the damping unit 2 communicated with the lower cavity of the other control oil cylinder 1 form inner end communication through the oil duct 4.
The damping valve group of the bending-preventing system is characterized in that the damping unit 2 is installed in the valve block 5, the oil duct 4 is formed in the valve block 5, the one-way valve 6, the damping valve 7 and the pressure limiting valve 8 in the damping unit 2 are all detachably installed in the oil duct 4 of the valve block 5, the modularized installation of the damping unit is formed, the one-way valve 6, the damping valve 7 and the pressure limiting valve 8 can be independently replaced and adjusted, so that the damping characteristics of the damping valve group can be adjusted according to the transverse damping requirements of a train, the transverse damping requirements of trains with different circuits and different running conditions are met, the practicability is improved, the oil duct 4 is formed in the valve block 5 and used for communication among the damping units 5, communication of each valve element in the damping unit 2 and communication of the control oil cylinder 1 and the main control valve group 3, the overhaul and maintenance of the damping valve group are facilitated, the service life of the damping valve group is prolonged, and the damping reliability is improved. When the left control cylinder 1 is compressed, the right control cylinder 1 is stretched, and when the left control cylinder 1 is stretched, the right control cylinder 1 is compressed, so that the compression and stretching of the upper cavity of the left control cylinder 1 and the lower cavity of the right control cylinder 1 are synchronous, the compression and stretching of the lower cavity of the left control cylinder 1 and the upper cavity of the right control cylinder 1 are synchronous, the damping unit 2 communicated with the upper cavity of one control cylinder 1 is communicated with the damping unit 2 communicated with the lower cavity of the other control cylinder 1 to form inner end communication through the oil duct 4, and the synchronous compression or stretching cavities in the two control cylinders 1 can be synchronous to feed or discharge oil, thereby ensuring the movement synchronism of the control cylinders 1 at two sides.
The opening direction of the one-way valve 6 is outwards, and the one-way valve 6 is jacked up by oil liquid along with the pressure reduction of the cavity in the control oil cylinder 1, so that the oil liquid in the main control valve group 3 outwards flows into the cavity with reduced pressure of the control oil cylinder 1 through the one-way valve 6; the opening direction of the pressure limiting valve 8 is inward, and the pressure limiting valve 8 is pushed open by oil along with the pressure increase of the cavity in the control oil cylinder 1, so that the oil flows out of the cavity with the pressure increase of the control oil cylinder 1 and flows into the main control valve group 3 through the pressure limiting valve 8. When the vehicle body a rotates clockwise relative to the bogie B, as shown in fig. 1, in order to reduce the rotation angle of the vehicle body, the left control cylinder 1 is compressed, the right control cylinder 1 is stretched, the upper cavity of the left control cylinder 1 and the lower cavity of the right control cylinder reduce with increasing oil pressure of the volume, the one-way valve 6 is pushed open by the oil flow in the oil duct of the master control valve group 3, so that the upper cavity of the left control cylinder 1 and the lower cavity of the right control cylinder 1 of the master control valve group 3 are filled with oil, meanwhile, the oil pressure of the lower cavity of the left control cylinder 1 and the upper cavity of the right control cylinder 1 are increased, the oil flows into the master control valve group 3 from the lower cavity of the left control cylinder 1 and the upper cavity of the right control cylinder 1 through the damping valve to form damping force, when the oil pressure of the lower cavity of the left control cylinder 1 and the upper cavity of the right control cylinder 1 is increased to be larger than the opening stiffness of the pressure limiting valve 8, the oil is pushed to open the pressure limiting valve 8, the oil is flowed into the master control valve group 3, and the damping valve 1 is opened by the limiting valve 8 to the lower side, so that the damping force is adjusted to meet the requirements of the damping valve group.
The check valve 6 comprises a valve body 61 screwed into the oil duct in a threaded fit manner, a valve seat 62 coaxially pressed by the valve body 61 in an interference fit manner and pressed on the valve block by the valve body 61, a lifting valve core 63 coaxially arranged between the valve body 61 and the valve seat 62, and a compression spring 64 clamped between the lifting valve core 63 and the valve body 61, wherein the lifting valve core 63 is in guide fit with the valve body 61, the compression spring 64 pushes the lifting valve core 63 to be in seal fit with the valve seat 62 to seal the oil duct 4, and the lifting valve core 63 is separated from the valve seat 62 along with the pushing of oil, so that the valve seat 62 is communicated with the valve body 61 to conduct the oil duct 4. The check valve 6 can only be opened outwards to guide the oil in the main control valve group 3 into the control oil cylinder 1, the valve body 61 is screwed into the oil duct 4 in a threaded mode, the valve seat 62 is tightly pressed on the valve block 5, the check valve 6 is detachably arranged in the oil duct, the lifting valve core 63 is coaxially arranged between the valve body 61 and the valve seat 62, one end of the lifting valve core is in guide fit with the valve body, the other end of the lifting valve core is in sealing fit with the valve seat 62 through the pushing of the compression spring 64 to seal the oil duct 4, when the oil pressure on one side of the valve seat 62 is larger, the lifting valve core 63 is pushed to move towards the valve body 61 and separated from the valve seat 62, the valve body 61 is communicated with the valve seat 62 to conduct the oil duct 4, and the oil in the main control valve group 3 flows into the control oil cylinder 1 through the check valve 6 to supplement the cavity with the increased volume of the control oil cylinder 1.
Wherein, the valve body 61 is provided with a guiding groove 611 into which the lifting valve core 63 is inserted in a guiding fit manner, the lifting valve core 63 is provided with a valve core groove 631 which is coaxially communicated with the guiding groove 611, one end of the compression spring 64 is inserted into the guiding groove 611, the other end is inserted into the valve core groove 631, the valve body 61 is provided with an oil passing through hole 612 which is positioned at the periphery of the guiding groove 611, and the oil passing through hole 612 is communicated with the inner hole of the valve seat 62 along with the separation of the lifting valve core 63 and the valve seat 62 to conduct the oil duct 4. The guide groove 611 guides the movement of the poppet 63, and the compression spring 64 is positioned by matching the guide groove 611 and the poppet groove 631, so that the compression stability of the compression spring 64 is ensured. When the lifting valve core 63 is separated from the valve seat 62, the inner hole of the valve seat 62 is communicated with the oil passing through hole 612 to conduct the oil duct 4, namely, the one-way valve 6 is opened, so that the forward opening flow rate of the one-way valve 6 is large, the pressure drop is small, oil can flow outwards into the control oil cylinder 1 through the one-way valve 6, when the pressure of a cavity with the increased volume of the control oil cylinder 1 rises to be equal to the pressure of the oil in the main control valve group 3, the lifting valve core 63 can be contacted with the valve seat 62 again to form a seal, the oil duct 4 is blocked, and the oil stops flowing to the control oil cylinder 1. The initial compression amount of the compression spring 4, that is, the opening stiffness of the compression spring 4 is adjusted to adjust the pressure required for opening the check valve 3.
The bottom of the lifting valve core 63 is provided with a sealing conical surface 632, the end face of the inner hole of the valve seat 62 is provided with a matching conical surface 621 in sealing contact with the sealing conical surface, and the sealing conical surface 632 is tightly attached to the matching conical surface 621 to seal the oil duct 4. The sealing conical surface 632 and the matching conical surface 621 are matched to ensure that the one-way valve 6 is opened positively and has large through flow and small pressure drop, the oil supplementing efficiency of the control oil cylinder is high after the one-way valve is opened, and the sealing performance of the one-way valve 6 is high after the one-way valve is closed reversely, so that a sealing ring tightly attached to the valve block 5 can be nested on the valve seat 62 for ensuring the sealing performance of the one-way valve, and oil is prevented from leaking from between the valve seat 62 and the oil duct 4.
The damping valve 7 is screwed in the oil duct 4 in the valve block 5 in a threaded fit manner, an inner hexagonal groove 71 coaxially aligned with the oil duct is formed in the damping valve 7, a damping small hole 72 communicating the oil duct 4 with the inner hexagonal groove 71 is formed in the bottom of the damping valve 7, a damping valve annular positioning surface 41 for positioning the damping valve 6 is formed in the oil duct 4, and a conical sealing surface 73 in contact with the edge of the damping valve annular positioning surface 41 is arranged on the bottom surface of the damping valve 7. The damping valve 7 is installed in the oil duct 4 in a threaded fit mode, and forms damping force through the oil passing of the damping small hole 72, the conical sealing surface 73 is in contact with the annular positioning surface 41 of the damping valve, sealing reliability is guaranteed, and the diameter of the damping small hole 72 is set according to the damping requirement of the control oil cylinder 1.
The pressure limiting valve 8 comprises a valve sleeve 81, a pressure limiting valve core 82, an adjusting screw 83, an adjusting spring 84, and an adjusting spring 84, wherein the valve sleeve 81 is pressed in an oil duct 4 in an interference manner, the pressure limiting valve core 82 is stretched into the valve sleeve 81 in a clearance fit manner, the adjusting screw 83 is stretched into the oil duct 4 in a threaded fit manner and is coaxially aligned with the pressure limiting valve core 82, the adjusting spring 84 is clamped between the adjusting screw 83 and the pressure limiting valve core 82, the adjusting spring 84 pushes the pressure limiting valve core 82 to be pressed on the end face of the valve sleeve 81 to seal the oil duct 4, and the pressure limiting valve core 82 moves towards one side of the adjusting screw along with the pushing of oil liquid to compress the adjusting spring 84 and conduct the oil duct 4. The valve sleeve 81 is pressed in the oil duct 4 in an interference manner, the precision and the wear resistance of the pressure limiting valve 8 can be ensured, the processing precision of the valve block 5 is reduced, the valve block cost is reduced, the pressure limiting valve core 82 is pressed on the end face of the valve sleeve 81 by the adjusting spring 84 to block the oil duct 4, when the oil pressure on one side of the valve sleeve is increased to be larger than the pressure of the adjusting spring 84, the pressure limiting valve core 82 is pushed to move towards one side of the adjusting screw, the pressure limiting valve 8 is opened to conduct the oil duct 4, namely, when the oil pressure of the compression chamber of the control oil cylinder 1 is larger than the pressure of the adjusting spring 84, the pressure limiting valve core 82 is pushed to move, the oil duct 4 is conducted, the oil in the compression chamber of the control oil cylinder 1 flows inwards into the main control valve block 3 through the pressure limiting valve 8, so that the oil pressure of the compression chamber of the control oil cylinder 1 is reduced, the damping force of the control oil cylinder is relieved, when the pressure of the compression chamber of the control oil cylinder 1 is equal to the pressure of the adjusting spring 84, therefore, the maximum damping force of the control oil cylinder 1 is reached, the maximum damping force of the control oil cylinder 1 can be limited through the adjustment of the initial compression quantity of the adjusting spring 84, namely, the maximum damping force of the control oil cylinder 8 is controlled to be adjusted through the initial compression quantity of the adjusting spring, and the maximum damping force of the adjusting cylinder 83 is adjusted, and the compression is convenient.
The pressure limiting valve core 82 is formed by coaxially and integrally forming an oil passing section 821 which is inserted into the valve sleeve 81 in a clearance fit manner, a conical section 822 which is tightly pressed on the end face of the valve sleeve 81 and seals an oil passage, and a T-shaped section 823 which is in contact with the adjusting spring 84, the cross section of the oil passing section 821 is in a concave three-flap shape, a plurality of oil passing channels which are axially arranged are formed between the oil passing section 821 and the valve sleeve 81, one end of the adjusting spring 84 is sleeved on the T-shaped section 823, and the end face of the adjusting spring 84 abuts against the T-shaped section. The cross section of the oil passing section 821 is in an inward concave three-flap shape, an inward concave oil passing channel is formed between the oil passing section 821 and the valve sleeve 81 as shown in the figure, the oil passing section 821 can guide the movement of the pressure limiting valve core 82, a plurality of oil passing channels are formed between the oil passing section 821 and the valve sleeve 81, the flow rate after opening is guaranteed, the conical section 822 compresses the end face of the pressure limiting valve sleeve 81 to seal an oil passage, the cooperation of the conical section 822 and the end face of the valve sleeve 81 guarantees the reverse sealing performance of the pressure limiting valve 8, when the pressure limiting valve 8 is opened, the plurality of oil passing channels between the oil passing section 821 and the valve sleeve 81 pass oil simultaneously, the forward opening flow rate of the pressure limiting valve 8 is large, the pressure drop is small, the pressure relief reliability is guaranteed, the damping force of the control oil cylinder 1 can be timely reduced after the pressure limiting valve 8 is opened, the T-shaped section 823 positions the adjusting spring 84, and the compression stability of the adjusting spring 84 is guaranteed.
Wherein, one end of the adjusting screw 83 extends out of the valve block and is sleeved with a self-locking nut 85 which is matched with the adjusting screw in a threaded way, and the inner end of the self-locking nut 85 is provided with a sealing nest 851 which is tightly pressed on the valve block 5 to seal the oil duct 4. The adjusting screw 83 is in threaded fit with the oil duct 4, the self-locking nut 85 is sleeved on the outer end of the adjusting screw 83 and tightly presses the oil duct opening on the valve block 5 through the sealing nest 851, the oil duct 4 is sealed, oil is prevented from leaking from between the adjusting screw 83 and the oil duct 4, and sealing reliability of the pressure limiting valve 8 is guaranteed.
The invention also provides an adjusting method of the damping valve group of the bending prevention system, which is characterized by comprising the following steps of: according to the transverse damping requirement of the train, the check valve 6, the damping valve 7 and/or the pressure limiting valve 8 in the damping unit 2 are replaced or the opening rigidity of the check valve 9 and/or the pressure limiting valve 8 in the damping unit is adjusted so as to adjust the damping characteristic of the damping valve group of the bending prevention system, so that the movement of the control oil cylinder 1 in the running process of the train can meet the requirement of transverse vibration reduction of the train body. The adjusting method realizes the adjustment of the damping characteristics of the damping valve group according to the transverse damping requirements of the train, meets the transverse damping requirements of trains with different lines and different running conditions, and has high practicability. The transverse damping requirement of the train is determined according to the running speed of the train, the structure of a suspension system, the road condition of a line and the like. The check valve 6, the damping valve 7 and the pressure limiting valve 8 are all detachably arranged in the oil duct 4 of the valve block 5, the damping unit 2 is installed in a modularized mode, the check valve 6, the damping valve 7 and the pressure limiting valve 8 can be independently replaced and adjusted, and damping characteristics of the damping valve block are convenient and simple to adjust.
The foregoing disclosure of embodiments of the present invention has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (10)
1. The damping valves of the bending prevention system are connected between two control cylinders which are transversely symmetrically arranged in the bending prevention system, the damping valves comprise four damping units, an upper cavity and a lower cavity of each control cylinder are respectively communicated with one damping unit, the outer ends of the damping units are communicated with the control cylinders, and the inner ends of the damping units are communicated with a main control valve group in the bending prevention system, and the damping valve group is characterized in that: the damping unit is arranged in a valve block provided with an oil duct, the damping unit comprises a one-way valve for supplementing oil to the control oil cylinder, a damping valve for providing damping force for the movement of the control oil cylinder and a pressure limiting valve for limiting the maximum damping force of the control oil cylinder, the damping valve, the one-way valve and the pressure limiting valve are all detachably arranged in the oil duct of the valve block and are connected in parallel through the oil duct, and the damping unit communicated with the upper cavity of one control oil cylinder and the damping unit communicated with the lower cavity of the other control oil cylinder form inner end communication through the oil duct.
2. The bending prevention system damping valve set of claim 1, wherein: the opening direction of the one-way valve faces outwards, and is jacked up by oil liquid along with the pressure reduction of the cavity in the control oil cylinder, so that the oil liquid in the main control valve group flows outwards to the cavity with reduced pressure of the control oil cylinder through the one-way valve; the opening direction of the pressure limiting valve is inward, and the pressure limiting valve is pushed open by oil along with the pressure increase of the cavity in the control oil cylinder, so that the oil flows out of the cavity with the pressure increase of the control oil cylinder and flows into the main control valve group through the pressure limiting valve.
3. The bending prevention system damping valve set of claim 2, wherein: the one-way valve comprises a valve body screwed into the oil duct in a threaded mode, a valve seat coaxially in interference press connection with the valve body and pressed on the valve block by the valve body, a lifting valve core coaxially arranged between the valve body and the valve seat, and a compression spring clamped between the lifting valve core and the valve body, wherein the lifting valve core is in guide fit with the valve body, the compression spring pushes the lifting valve core to be in seal fit with the valve seat to seal the oil duct, and the lifting valve core is separated from the valve seat along with the pushing of oil, so that the valve seat is communicated with the valve body to conduct the oil duct.
4. A damper block for an anti-bending system according to claim 3, wherein: the valve body on set up the guide groove that supplies the lifting valve core to lead to cooperate and stretch into, set up on the lifting valve core with the coaxial UNICOM of guide groove case recess, compression spring's one end stretches into in the guide groove, the other end stretches into in the case recess, set up the oily through-hole that crosses that lies in the guide groove periphery on the valve body, cross oily through-hole and the hole UNICOM of disk seat with lifting valve core and disk seat and switch on the oil duct along with the separation of lifting valve core.
5. The bending prevention system damping valve set of claim 4, wherein: the bottom of the lifting valve core is provided with a sealing conical surface, the end face of the inner hole of the valve seat is provided with a matching conical surface in sealing contact with the sealing conical surface, and the sealing conical surface is tightly attached to the matching conical surface to seal the oil duct.
6. The bending prevention system damping valve set of claim 1, wherein: the damping valve is screwed in an oil duct in the valve block in a threaded fit manner, an inner hexagonal groove coaxially aligned with the oil duct is formed in the damping valve, a damping small hole communicated with the oil duct and the inner hexagonal groove is formed in the bottom of the damping valve, an annular damping valve positioning surface for positioning the damping valve is formed in the oil duct, and the bottom surface of the damping valve is a conical sealing surface in contact with the edge of the annular damping valve positioning surface.
7. The bending prevention system damping valve set of claim 2, wherein: the pressure limiting valve comprises a valve sleeve, a pressure limiting valve core and an adjusting screw, wherein the valve sleeve is pressed in an oil duct in an interference manner, the pressure limiting valve core is in clearance fit and stretches into the valve sleeve, the adjusting screw is in threaded fit and stretches into the oil duct and is coaxially aligned with the pressure limiting valve core, the adjusting spring is clamped between the adjusting screw and the pressure limiting valve core, the adjusting spring pushes the pressure limiting valve core to be pressed on the end face of the valve sleeve to seal the oil duct, and the pressure limiting valve core moves towards one side of the adjusting screw along with pushing of oil liquid to compress the adjusting spring, and conducts the oil duct.
8. The bending prevention system damping valve set of claim 7, wherein: the pressure limiting valve core is formed by integrally forming an oil passing section which is inserted into the valve sleeve in a clearance fit manner, a conical section which is tightly pressed on the end face of the valve sleeve and used for plugging an oil duct and a T-shaped section which is in contact with the adjusting spring in a coaxial manner, the cross section of the oil passing section is in a concave three-flap shape, a plurality of oil passing channels which are axially arranged are formed between the oil passing section and the valve sleeve, and one end of the adjusting spring is sleeved on the T-shaped section and the end face of the adjusting spring is propped against the T-shaped section.
9. The bending prevention system damping valve set of claim 8, wherein: one end of the adjusting screw extends out of the valve block and is sleeved with a self-locking nut in threaded fit with the adjusting screw, and the inner end of the self-locking nut is provided with a sealing nest which is pressed on the valve block to seal the oil duct.
10. The method for adjusting a damping valve group of an anti-bending system according to any one of claims 1 to 9, characterized in that: according to the transverse damping requirement of the train, the check valve, the damping valve and/or the pressure limiting valve in the damping unit are replaced or the opening rigidity of the check valve and/or the pressure limiting valve in the damping unit is adjusted so as to adjust the damping characteristic of the damping valve group of the bending prevention system, so that the movement of the control oil cylinder in the running process of the train can meet the requirement of transverse vibration reduction of the train body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311241280.0A CN117329259A (en) | 2023-09-25 | 2023-09-25 | Damping valve group of bending-preventing system and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311241280.0A CN117329259A (en) | 2023-09-25 | 2023-09-25 | Damping valve group of bending-preventing system and adjusting method thereof |
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| CN117329259A true CN117329259A (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311241280.0A Pending CN117329259A (en) | 2023-09-25 | 2023-09-25 | Damping valve group of bending-preventing system and adjusting method thereof |
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| FR2211360A1 (en) * | 1972-12-27 | 1974-07-19 | Couillandeau Gerard | |
| FR2766444A1 (en) * | 1997-07-24 | 1999-01-29 | Gec Alsthom Transport Sa | Oleopneumatic suspension apparatus for road or rail vehicles |
| JP2017155893A (en) * | 2016-03-03 | 2017-09-07 | センクシア株式会社 | Pressure regulator and hydraulic damper |
| CN109469739A (en) * | 2018-12-30 | 2019-03-15 | 宁夏吴忠生辉仪表有限公司 | The double guiding single-seat adjusting valves of multichannel |
| US20210197640A1 (en) * | 2018-05-29 | 2021-07-01 | Hitachi Automotive Systems, Ltd. | Suspension apparatus |
| CN215522109U (en) * | 2021-09-10 | 2022-01-14 | 上海海越安全工程设备有限公司 | Built-in check valve of container valve |
| CN114412872A (en) * | 2022-03-02 | 2022-04-29 | 江苏建筑职业技术学院 | Bidirectional damping valve for hydraulic pilot control system |
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2023
- 2023-09-25 CN CN202311241280.0A patent/CN117329259A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2211360A1 (en) * | 1972-12-27 | 1974-07-19 | Couillandeau Gerard | |
| FR2766444A1 (en) * | 1997-07-24 | 1999-01-29 | Gec Alsthom Transport Sa | Oleopneumatic suspension apparatus for road or rail vehicles |
| JP2017155893A (en) * | 2016-03-03 | 2017-09-07 | センクシア株式会社 | Pressure regulator and hydraulic damper |
| US20210197640A1 (en) * | 2018-05-29 | 2021-07-01 | Hitachi Automotive Systems, Ltd. | Suspension apparatus |
| CN109469739A (en) * | 2018-12-30 | 2019-03-15 | 宁夏吴忠生辉仪表有限公司 | The double guiding single-seat adjusting valves of multichannel |
| CN215522109U (en) * | 2021-09-10 | 2022-01-14 | 上海海越安全工程设备有限公司 | Built-in check valve of container valve |
| CN114412872A (en) * | 2022-03-02 | 2022-04-29 | 江苏建筑职业技术学院 | Bidirectional damping valve for hydraulic pilot control system |
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