CN113983112B - Damper for floating slab track bed - Google Patents
Damper for floating slab track bed Download PDFInfo
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- CN113983112B CN113983112B CN202111362780.0A CN202111362780A CN113983112B CN 113983112 B CN113983112 B CN 113983112B CN 202111362780 A CN202111362780 A CN 202111362780A CN 113983112 B CN113983112 B CN 113983112B
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
- F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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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
- F16F9/10—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
- F16F9/18—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 a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—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 a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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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
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
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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
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
- F16F9/5123—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity responsive to the static or steady-state load on the damper
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
Abstract
The invention relates to the field of rail transit, and particularly discloses a damper for a floating slab track bed, which comprises a piston assembly and a cylinder; the piston assembly comprises a piston rod, and the piston rod penetrates through the cylinder along the axial direction of the cylinder, extends out of the cylinder and can move relative to the cylinder; oil liquid is filled in the cylinder; the cylinder body is connected with the floating slab track bed, and the piston rod is connected with a foundation; the piston assembly comprises a torsion structure and a spring assembly; the torsion structure is connected with the piston rod and moves along with the piston rod, and the cylinder is separated to form an upper cavity and a lower cavity; the spring assembly is respectively connected with the piston assembly and the cylinder body; the torsion structure is internally provided with a normally-broken oil duct, and the oil duct is communicated after the load borne by the cylinder is increased. The invention can improve the vibration damping performance when a vehicle passes through, improve the rigidity of the damper when the vehicle does not pass through and ensure the supporting effect on the floating plate track bed.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a damper of a floating plate road bed.
Background
In rail transit, when the vehicle passes through the track, the vibration that arouses will be transmitted to on the ground, will cause the destruction to the ground, influences the firm degree of ground. In addition, noise is generated in the vibration transmission process, and the influence on the life of residents is caused. To reduce the influence of vibrations generated when a vehicle passes. In the prior art, a steel spring floating slab track bed is designed to reduce the vibration transmitted to the foundation. However, in the floating track bed structure, the damping element is only required to perform a vibration damping function when the vehicle passes through, and the floating track bed is required to be supported when the vehicle does not pass through. The stiffness of the damping elements used in prior art floating slab track beds is often fixed, for example, the low frequency floating slab track disclosed in chinese patent No. CN 102535260B. The fixed stiffness damping elements are difficult to guarantee both the damping effect and the supporting effect on the floating slab track bed.
Disclosure of Invention
The invention aims to overcome the defect that the vibration reduction effect and the supporting effect on a floating slab track bed are difficult to be considered simultaneously in the floating slab track bed, and provides a damper which is applied to the floating slab track bed and can improve the vibration reduction performance when a vehicle passes through and improve the rigidity when the vehicle does not pass through.
A damper for a floating ballast bed comprises a piston assembly and a cylinder; the piston assembly comprises a piston rod, and the piston rod penetrates through the cylinder along the axial direction of the cylinder, extends out of the cylinder and can move relative to the cylinder; oil liquid is filled in the cylinder;
the cylinder is connected with the floating slab track bed, and the piston rod is connected with a foundation;
the piston assembly comprises a torsion structure and a spring assembly; the torsion structure is connected with the piston rod and moves along with the piston rod, and the cylinder is separated to form an upper cavity and a lower cavity; the spring assembly is respectively connected with the piston assembly and the cylinder body;
the torsion structure is internally provided with a normally-broken oil duct, and the oil duct is conducted after the load borne by the cylinder is increased.
Further, the torsion structure comprises a secondary piston, a torsion block, a torsion spring and a piston body; the auxiliary piston can be movably arranged in the upper cavity along the axial direction of the cylinder body to divide the upper cavity into a first cavity and a second cavity; the torsion block is arranged in the second cavity and is connected with the auxiliary piston through a torsion spring; the piston body is connected with the piston rod, and the top surface of the piston body is attached to the bottom surface of the torsion block; the oil passages comprise a first oil passage penetrating through the twisting block and a second oil passage penetrating through the piston body, and the first oil passage and the second oil passage are staggered under the normal loading state of the cylinder body; the top surface of the twisting block is provided with a raised tooth block which is formed by surrounding a first surface, a second surface and a third surface; the first surface is attached to the twisting block, and the second surface protrudes towards the direction far away from the third surface.
Furthermore, the top surface of the twisting block is provided with a plurality of tooth blocks, and the tooth blocks surround the axis of the twisting block in a vortex shape.
Furthermore, a guide bulge is arranged on the circumferential surface of the auxiliary piston; the inner wall of the cylinder body is provided with a guide groove extending along the axial direction of the cylinder body; the guide bulge can be movably arranged in the guide groove to limit the rotation of the auxiliary piston.
Further, a pre-guide groove is formed in the top surface of the piston body and communicated with the second oil duct; the pre-guide groove is arc-shaped, the circle center of the pre-guide groove is located on the rotation center line of the torsion block, and the radius of the pre-guide groove is equal to the distance between the first oil passage and the rotation center line of the torsion block.
Furthermore, an auxiliary oil duct is formed in the auxiliary piston and communicated with the first cavity and the second cavity.
Furthermore, a gap for containing oil to pass through is reserved between the piston assembly and the inner wall of the cylinder body all the time.
Further, the cylinder body comprises a top cover, a cylinder body and a bottom cover which are connected in sequence; the top cover is provided with a first through hole for the piston rod to pass through, and the bottom cover is provided with a second through hole for the piston rod to pass through.
Further, a first sealing groove is formed in the top cover, and a first sealing assembly for sealing the top cover and the piston rod is filled in the first sealing groove; and a second sealing groove is formed in the bottom cover, and a second sealing assembly for sealing the bottom cover and the piston rod is filled in the second sealing groove.
Furthermore, the extending end of the piston rod is connected with the foundation through a spherical hinge.
Has the advantages that: according to the damper for the floating slab track bed, when a vehicle passes through the floating slab track bed, the load of the floating slab track bed is increased, so that the load of a cylinder is increased, an oil duct is communicated, oil is exchanged between a lower cavity and an upper cavity, energy is further consumed, and the vibration reduction effect is improved; when the vehicle does not pass through the floating slab track bed, the damper is in a normal working state, and the oil duct is in a disconnected state, so that the rigidity of the damper is improved, and the supporting effect on the floating slab track bed is ensured. Therefore, the damper for the floating slab track bed disclosed by the invention automatically controls the on-off of the oil duct according to the load change when the vehicle passes and does not pass, and simultaneously considers the vibration reduction effect and the supporting effect on the floating slab track bed.
Drawings
FIG. 1 is an axial cross-sectional schematic view of a damper in an embodiment of the invention;
FIG. 2 is an enlarged schematic view of the area X in FIG. 1;
FIG. 3 is a schematic front view of a twist block in an embodiment of the invention;
FIG. 4 is a schematic top view of a twist block in an embodiment of the present invention;
FIG. 5 isbase:Sub>A cross-sectional view taken along A-A of FIG. 4;
FIG. 6 is a schematic top view of a piston body according to an embodiment of the present invention;
fig. 7 is a cross-sectional view taken along line B-B of fig. 6.
Reference numerals: 1. a piston rod; 2. a foundation; 3. a secondary piston; 4. twisting the block; 5. a torsion spring; 6. a first cavity; 7. a second cavity; 8. a lower cavity; 9. a piston body; 10. a first oil passage; 11. a second oil passage; 12. a tooth block; 13. a first side; 14. a second face; 15. a third surface; 16. pre-guiding a groove; 17. an auxiliary oil passage; 18. a top cover; 19. a barrel body; 20. a bottom cover; 21. a first seal assembly; 22. a second seal assembly; 23. a dust cover; 24. a guide projection; 25. a guide groove; 26. a first spring; 27. a second spring.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The present embodiment provides a damper for a floating ballast bed, as shown in fig. 1, which includes a piston assembly and a cylinder; the piston assembly comprises a piston rod 1, a torsion structure and a spring assembly; the piston rod 1 penetrates through the cylinder along the axial direction of the cylinder, extends out of the cylinder and can move relative to the cylinder; oil is filled in the cylinder; the cylinder is connected with the floating slab track bed, and the piston rod 1 is connected with the foundation 2.
The shock absorber takes a piston assembly, oil and a spring assembly as damping elements; when the train passes through the floating slab track bed, the damping element consumes energy, thereby playing a role in damping vibration; when the train does not pass through the floating slab track bed, the shock absorber has certain rigidity, so that the shock absorber plays a role in supporting the floating slab.
In order to give consideration to the vibration damping effect when a train passes through and the supporting effect of the train on the floating slab track bed when the train does not pass through, a normally-broken oil duct is arranged in the torsion structure. When a train passes through, the oil duct is communicated after the load borne by the cylinder is increased, so that an oil exchange channel is added between the upper cavity and the lower cavity, the energy consumption is improved, and the vibration reduction effect is improved. After the train leaves, the oil duct is restored to a normally-off state after the load borne by the cylinder is reduced, so that the rigidity of the shock absorber is improved, and the supporting effect on the floating slab track bed is ensured.
Specifically, the torsion structure comprises an auxiliary piston 3, a torsion block 4, a torsion spring 5 and a piston body 9, wherein the auxiliary piston 3 and the torsion block 4 are respectively arranged in the cylinder body in a manner of moving along the axial direction of the cylinder body so as to divide the cylinder body into a first cavity 6, a second cavity 7 and a lower cavity 8; oil is filled in the first cavity 6, the second cavity 7 and the lower cavity 8, and gaps exist between the auxiliary piston 3, the torsion block 4 and the piston body 9 and the inner wall of the cylinder body respectively, so that oil exchange can be carried out among the first cavity 6, the second cavity 7 and the lower cavity 8.
The torsion spring 5 is arranged in the second cavity 7, and two ends of the torsion spring are respectively connected with the auxiliary piston 3 and the torsion block 4; a first oil duct 10 which penetrates through the twisting block 4 is formed in the twisting block, and a second oil duct 11 which penetrates through the twisting block is formed in the piston body 9; the linear distance between the first oil channel 10 and the rotation center of the torsion block 4 is equal to the linear distance between the second oil channel 11 and the rotation center of the torsion block 4; the piston body 9 is directly formed on the piston rod 1 and moves along with the piston rod 1, and the top surface of the piston body 9 is attached to the bottom surface of the torsion block 4. When a vehicle does not pass through the floating slab track bed, the damper is in a normal state, the first oil duct 10 and the second oil duct 11 are staggered, the first oil duct 10 and the second oil duct 11 are in a disconnected state, and oil in the second cavity 7 cannot be exchanged with the lower cavity 8 through the first oil duct 10 and the second oil duct 11.
The top surface of the torsion block 4 is provided with 6 tooth blocks 12, and 6 tooth blocks 12 spirally surround the axle center of the torsion block 4; referring to fig. 3 and 4, each tooth block 12 is surrounded by a first surface 13, a second surface 14 and a third surface 15, the first surface 13 is attached to the torsion block 4, and the second surface 14 protrudes in a direction away from the third surface 15, so that the area of the second surface 14 is larger than that of the third surface 15. When a vehicle passes through the floating slab track bed, the load applied to the cylinder is increased and the cylinder moves downwards, so that the volume of the first cavity 6 is reduced, oil in the first cavity 6 flows into the second cavity 7, so that the oil pressure in the second cavity 7 is increased, according to the bernoulli principle, because the area of the second surface 14 is larger than that of the third surface 15, the stroke of the oil flowing through the second surface 14 is larger, the flow rate is higher, and the pressure is lower, so that a pressure difference is formed between the second surface 14 and the third surface 15, the tooth block 12 is driven to rotate clockwise, the torsion block 4 overcomes the elastic force of the torsion spring 5 to rotate clockwise, the first oil passage 10 and the second oil passage 11 are changed to a communicated state, at the moment, part of the oil in the second cavity 7 is subjected to oil exchange with the lower cavity 8 through the first oil passage 10 and the second oil passage 11, because the oil exchange passage is increased, in the oil flowing process, energy is further consumed under the action of fluid resistance, and the damping effect is better when the vehicle passes through the damper. When a vehicle leaves the floating slab track, the load borne by the cylinder is reduced and is restored to a normal state, the torsion block 4 rotates anticlockwise under the torsion of the torsion spring 5, and the first oil duct 10 and the second oil duct 11 are restored to a staggered state and are not communicated, so that the rigidity of the damper is improved, and the damper can better support the floating slab track bed when no vehicle passes through. In the present embodiment, the contact surfaces between the torsion block 4 and the piston body 9 are all small rough surfaces, so that the torsion block 4 and the piston body 9 can rotate smoothly relative to each other.
In the embodiment, the torsion spring 5 is arranged between the torsion block 4 and the auxiliary piston 3, the oil in the second cavity 7 is increased due to the increase of the loading of the cylinder, and when the torsion block 4 is driven to rotate, the torsion spring 5 forms a resistance to the rotation, so that the overall rigidity of the damper is increased; by selecting torsion springs 5 with different stiffness, the response degree of the damper to the vibration load can be changed. On the other hand, when the loading of the cylinder is reduced, the torsion spring 5 can drive the torsion block 4 to rotate reversely, so that the torsion block 4 is reset, and an oil passage is cut off.
As a further modification of the present embodiment, referring to fig. 6, a pre-guide groove 16 is provided at the top of the piston body 9, and the pre-guide groove 16 has a circular arc shape and is communicated with the second oil passage 11; the center of the pre-guiding slot 16 is located on the rotation center line of the twisting block 4, and the radius of the pre-guiding slot is equal to the distance between the first oil channel 10 and the rotation center line. When the twisting block 4 rotates, after the first oil duct 10 is communicated with the pre-guide groove 16, oil in the second cavity 7 can be exchanged with oil in the lower cavity 8 through the first oil duct 10, the pre-guide groove 16 and the second oil duct 11, so that the load change range is widened, and the twisting block is more suitable for vehicles with different types and different loads. The arc length of the pre-guide groove 16 may be set to 1/2 r in the present embodiment, where r refers to the radius of the pre-guide groove 16, i.e., the distance between the first oil passage 10 and the twist centerline.
In the embodiment, the torsion block 4 is provided with two first oil channels 10, and the two first oil channels 10 are symmetrically arranged along the axis of the torsion block 4; correspondingly, the piston body 9 is provided with two second oil channels 11 and two pre-guide grooves 16, which are symmetrically arranged along the axis of the piston body 9. In this embodiment, the auxiliary piston 3 and the torsion block 4 are respectively sleeved on the piston rod 1, and the auxiliary piston 3, the torsion block 4, the piston body 9 and the piston rod 1 are coaxially arranged.
In this embodiment, the auxiliary piston 3 is further provided with four auxiliary oil ducts 17 uniformly arranged along the axis of the auxiliary piston 3, the auxiliary oil ducts 17 communicate the first cavity 6 and the second cavity 7, and the oil exchange speed between the first cavity 6 and the second cavity 7 is increased by the auxiliary oil ducts 17.
Specifically, the cylinder body comprises a top cover 18, a cylinder body 19 and a bottom cover 20 which are sequentially connected from top to bottom, the top cover 18 is welded with the cylinder body 19, and the bottom cover 20 is welded with the cylinder body 19; the top cover 18 is provided with a first through hole for accommodating the piston rod 1 to pass through, and the bottom cover 20 is provided with a second through hole for accommodating the piston rod 1 to pass through. A first sealing groove is formed in the top cover 18, and the first sealing assembly 21 for sealing the top cover 18 and the piston rod 1 is filled in the first sealing groove; a second sealing groove is formed in the bottom cover 20, and a second sealing assembly 22 for sealing the bottom cover 20 and the piston rod 1 is filled in the second sealing groove. And in the relative movement process of the cylinder and the piston rod 1, the sealing performance of the damper of the cylinder is ensured. The top cover 18 is also provided with a dust cover 23, and the dust cover 23 is connected to the top cover 18 by a screw, and surrounds the piston rod 1 and the first through hole to prevent dust.
As a further improvement of this embodiment, referring to fig. 2, a guide protrusion 24 is provided on the circumferential surface of the auxiliary piston 3, and a guide groove 25 extending in the axial direction of the cylinder 19 is provided on the inner wall of the cylinder 19; the guide protrusion 24 is movably disposed in the guide groove 25 to limit the rotation of the sub-piston 3 and prevent the sub-piston 3 from rotating together with the torsion block 4.
Specifically, the spring assembly comprises a first spring 26 and a second spring 27 sleeved on the piston rod 1, the first spring 26 is arranged in the first cavity 6, one end of the first spring is abutted against the top cover 18, the radial movement of the first spring is limited by a first positioning bulge on the top cover 18, and the other end of the first spring is abutted against the auxiliary piston 3; the second spring 27 is disposed in the second chamber 7, and has one end abutting against the bottom cover 20, and the radial play thereof is limited by the second positioning protrusion on the bottom cover 20, and the other end abutting against the piston body 9. The first spring 26 and the second spring 27 are always in a compressed state and are used for driving the piston assembly and the cylinder to move relatively to reset; and the spring assembly also serves as a damping system for damping vibrations.
In the embodiment, the extending end of the piston rod 1 is connected with the foundation 2 through a spherical hinge, and the angle of the damper can be changed through the spherical hinge, so that the loads in different directions formed when a vehicle passes through the damper can be adapted.
The working process of the damper provided by the embodiment is as follows:
when the vehicle does not pass through the floating slab track bed, the damper is in a normal working state, and the first channel and the second channel are mutually staggered and are in a disconnected state; the oil in the second cavity 7 cannot exchange with the lower cavity 8 through the first oil duct 10 and the second oil duct 11; at the moment, the rigidity of the damper is relatively high, and the supporting effect on the floating plate track bed is ensured.
When a vehicle passes through the floating slab track bed, the dead weight and the load of the vehicle increase the load borne by the cylinder and move downwards, so that the volume of the first cavity 6 is reduced, oil in the first cavity 6 flows into the second cavity 7 to increase the oil pressure in the second cavity 7, and when the oil flows through the tooth block 12, the tooth block 12 drives the torsion block 4 to rotate clockwise due to the pressure difference generated between the second surface 14 and the third surface 15, so that the first oil duct 10 is communicated with the second oil duct 11; oil is exchanged between the second cavity 7 and the lower cavity 8 through the first oil duct 10 and the second oil duct 11, so that energy is further consumed, and the vibration reduction effect of the damper is improved.
After the vehicle leaves the floating slab track bed, the extra load borne by the cylinder disappears, the cylinder returns to a normal state under the action of the spring assembly, at the moment, the oil does not flow any more, the torsion block 4 returns to the normal state under the action of the torsion spring 5, the first oil duct 10 and the second oil duct 11 are staggered again, the rigidity of the damper is improved, and the supporting effect on the floating slab track bed is still kept.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (4)
1. A damper for a floating ballast bed comprises a piston assembly and a cylinder; the piston assembly comprises a piston rod, and the piston rod penetrates through the cylinder along the axial direction of the cylinder, extends out of the cylinder and can move relative to the cylinder; oil liquid is filled in the cylinder; the method is characterized in that:
the cylinder is connected with the floating slab track bed, and the piston rod is connected with a foundation;
the piston assembly comprises a torsion structure and a spring assembly; the torsion structure is connected with the piston rod and moves along with the piston rod, and the cylinder is separated to form an upper cavity and a lower cavity; the spring assembly is respectively connected with the piston assembly and the cylinder body;
a normally-broken oil duct is arranged in the torsion structure, and the oil duct is communicated after the load borne by the cylinder is increased;
the torsion structure comprises an auxiliary piston, a torsion block, a torsion spring and a piston body; the auxiliary piston can be movably arranged in the upper cavity along the axial direction of the cylinder body to divide the upper cavity into a first cavity and a second cavity; the torsion block is arranged in the second cavity and is connected with the auxiliary piston through a torsion spring; the piston body is connected with the piston rod, and the top surface of the piston body is attached to the bottom surface of the torsion block; the oil ducts comprise a first oil duct penetrating through the twisting block and a second oil duct penetrating through the piston body, and the first oil duct and the second oil duct are staggered in a normal loaded state of the cylinder body; the top surface of the torsion block is provided with a raised tooth block which is formed by surrounding a first surface, a second surface and a third surface; the first surface is attached to the torsion block, and the second surface protrudes towards the direction far away from the third surface, so that the area of the second surface is larger than that of the third surface;
the top surface of the twisting block is provided with a plurality of tooth blocks, and the tooth blocks spirally surround the axis of the twisting block;
the circumferential surface of the auxiliary piston is provided with a guide bulge; the inner wall of the cylinder body is provided with a guide groove extending along the axial direction of the cylinder body; the guide bulge is movably arranged in the guide groove and used for limiting the rotation of the auxiliary piston;
the top surface of the piston body is provided with a pre-guide groove which is communicated with the second oil duct; the pre-guide groove is arc-shaped, the circle center of the pre-guide groove is positioned on the rotating central line of the twisting block, and the radius of the pre-guide groove is equal to the distance between the first oil passage and the rotating central line of the twisting block;
an auxiliary oil duct is formed in the auxiliary piston and communicated with the first cavity and the second cavity;
and a gap for containing oil to pass through is reserved between the piston assembly and the inner wall of the cylinder body all the time.
2. The damper for a floating ballast bed according to claim 1, wherein said cylinder comprises a top cap, a cylinder body and a bottom cap connected in sequence; the top cover is provided with a first through hole for the piston rod to pass through, and the bottom cover is provided with a second through hole for the piston rod to pass through.
3. The damper for a floating ballast bed according to claim 2, wherein a first seal groove is formed in said top cover, and a first seal assembly for sealing said top cover and said piston rod is filled in said first seal groove; and a second sealing groove is formed in the bottom cover, and a second sealing assembly for sealing the bottom cover and the piston rod is filled in the second sealing groove.
4. The damper for a floating ballast bed according to claim 1, wherein the extended end of the piston rod is connected to the foundation by a ball joint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111362780.0A CN113983112B (en) | 2021-11-17 | 2021-11-17 | Damper for floating slab track bed |
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| CN202111362780.0A CN113983112B (en) | 2021-11-17 | 2021-11-17 | Damper for floating slab track bed |
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| CN113983112A CN113983112A (en) | 2022-01-28 |
| CN113983112B true CN113983112B (en) | 2023-02-28 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5533597A (en) * | 1992-02-03 | 1996-07-09 | Tokico Ltd. | Suspension control device |
| CN1888466A (en) * | 2005-06-28 | 2007-01-03 | 比亚迪股份有限公司 | Adjustable damping vibration reducer |
| CN202431823U (en) * | 2011-12-06 | 2012-09-12 | 北京市捷瑞特弹性阻尼体技术研究中心 | Automatic damping-force adjustment type elastic daub buffer |
| CN104088953A (en) * | 2014-06-30 | 2014-10-08 | 张世亮 | Magnetorheological damper with adjustable piston net cross section area |
| CN203962837U (en) * | 2014-06-30 | 2014-11-26 | 张世亮 | A kind of damper and damping system thereof |
| CN206175552U (en) * | 2016-08-29 | 2017-05-17 | 安徽工程大学 | Electricity rheological damping ware |
| CN207188044U (en) * | 2017-08-01 | 2018-04-06 | 张从桢 | A kind of shower nozzle for sector of spraying surely |
| CN110319142A (en) * | 2019-06-27 | 2019-10-11 | 江苏大学 | A kind of piston valve of self-adaptive damping damper |
| CN210510094U (en) * | 2019-08-06 | 2020-05-12 | 江苏电力装备有限公司 | Adjustable viscous damper |
| US11009094B1 (en) * | 2021-01-08 | 2021-05-18 | Factory Kahne, Llc | System and method for using a piston face and shim in a shock absorber with varying port configurations |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016212654A1 (en) * | 2016-07-12 | 2018-01-18 | Stabilus Gmbh | A rail brake damper |
-
2021
- 2021-11-17 CN CN202111362780.0A patent/CN113983112B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5533597A (en) * | 1992-02-03 | 1996-07-09 | Tokico Ltd. | Suspension control device |
| CN1888466A (en) * | 2005-06-28 | 2007-01-03 | 比亚迪股份有限公司 | Adjustable damping vibration reducer |
| CN202431823U (en) * | 2011-12-06 | 2012-09-12 | 北京市捷瑞特弹性阻尼体技术研究中心 | Automatic damping-force adjustment type elastic daub buffer |
| CN104088953A (en) * | 2014-06-30 | 2014-10-08 | 张世亮 | Magnetorheological damper with adjustable piston net cross section area |
| CN203962837U (en) * | 2014-06-30 | 2014-11-26 | 张世亮 | A kind of damper and damping system thereof |
| CN206175552U (en) * | 2016-08-29 | 2017-05-17 | 安徽工程大学 | Electricity rheological damping ware |
| CN207188044U (en) * | 2017-08-01 | 2018-04-06 | 张从桢 | A kind of shower nozzle for sector of spraying surely |
| CN110319142A (en) * | 2019-06-27 | 2019-10-11 | 江苏大学 | A kind of piston valve of self-adaptive damping damper |
| CN210510094U (en) * | 2019-08-06 | 2020-05-12 | 江苏电力装备有限公司 | Adjustable viscous damper |
| US11009094B1 (en) * | 2021-01-08 | 2021-05-18 | Factory Kahne, Llc | System and method for using a piston face and shim in a shock absorber with varying port configurations |
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|---|---|
| CN113983112A (en) | 2022-01-28 |
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