CN112145606A - Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof - Google Patents

Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof Download PDF

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Publication number
CN112145606A
CN112145606A CN202011130937.2A CN202011130937A CN112145606A CN 112145606 A CN112145606 A CN 112145606A CN 202011130937 A CN202011130937 A CN 202011130937A CN 112145606 A CN112145606 A CN 112145606A
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CN
China
Prior art keywords
boss
valve plate
inclined hole
annular groove
piston
Prior art date
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Pending
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CN202011130937.2A
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Chinese (zh)
Inventor
陈虎
唐俊杰
夏亮亮
周青
周廷萍
李伟
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ZHEJIANG YONGGUI ELECTRIC EQUIPMENT CO Ltd
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ZHEJIANG YONGGUI ELECTRIC EQUIPMENT CO Ltd
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Priority to CN202011130937.2A priority Critical patent/CN112145606A/en
Publication of CN112145606A publication Critical patent/CN112145606A/en
Pending legal-status Critical Current

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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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention discloses a valve piece type piston unit of an oil pressure damper for a rail locomotive vehicle and a using method of the valve piece type piston unit. Most of piston units of the existing common double-circulation valve plate type oil pressure shock absorber are pressed by adopting a die. The two ends of the piston are respectively provided with a boss I and a boss II which are integrally formed; the outer diameters of the first boss and the second boss are smaller than the outer diameter of the piston; the first boss and the second boss are both provided with annular grooves; the bottom of one annular groove is provided with a first inclined hole group, and the bottom of the other annular groove is provided with a second inclined hole group; the inclined hole group I consists of n inclined holes I which are uniformly distributed along the circumferential direction; one end of the inclined hole I facing the boss II is opened at the outer edge of the boss; the inclined hole group II consists of n inclined holes II which are uniformly distributed along the circumferential direction, and one end of each inclined hole II facing the boss I is opened at the outer edge of the boss I; the top of the annular groove provided with the inclined hole group I is provided with a valve plate I, and the top of the other annular groove is provided with a valve plate II. The invention can adopt machining and is suitable for the production of products with different specifications.

Description

Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof
Technical Field
The invention belongs to the technical field of oil pressure dampers for rail rolling stock, and particularly relates to a valve plate type piston unit of a double-circulation oil pressure damper for a rail rolling stock and a using method of the valve plate type piston unit.
Background
A schematic diagram of a conventional dual-circulation valve plate type oil pressure shock absorber is shown in fig. 1 and 2, and mainly comprises a piston rod 1, a guide sealing component 2, a pressure tube 3, a reserve tube 4, a piston unit 5 and a bottom valve unit 6. The two ends of the piston unit 5 are respectively provided with a first valve plate 51 and a second valve plate 52, the two ends of the bottom valve unit 6 are respectively provided with a third valve plate 61 and a fourth valve plate 62, and each valve plate is made of elastic metal materials. FIG. 1 is a schematic diagram of the working state and the flow direction of each valve plate in the stretching process of the shock absorber, the curved arrow represents the flow direction, in the process, high pressure is generated in the upper chamber of the pressure cylinder 3, the valve plate II 52 on the piston unit and the valve plate III 61 on the bottom valve unit are opened, the valve plate II 52 is bent and deformed to generate proper damping force, oil enters the lower chamber of the pressure cylinder 3 after being unloaded by the piston unit 5, the valve plate III 61 is opened at the same time, the oil stored between the oil storage cylinder 4 and the pressure cylinder 3 is automatically supplemented to the lower chamber of the pressure cylinder 3, and the valve plate I51 on the piston unit and the valve plate IV 62 on the bottom valve unit; fig. 2 is a schematic diagram of the working state and the fluid flow direction of each valve plate in the compression process of the shock absorber, the curved arrow represents the fluid flow direction, in the process, high pressure is generated in the lower cavity of the pressure cylinder 3, the valve plate one 51 on the piston unit and the valve plate four 62 on the bottom valve unit are opened, a part of oil enters the upper cavity of the pressure cylinder 3 through the piston unit 5, the other part of oil enters the oil storage cavity between the oil storage cylinder 4 and the pressure cylinder 3 after being unloaded by the bottom valve unit 6, and the valve plate two 52 on the piston unit and the valve plate three 61 on the bottom valve unit are closed.
The specific structure of the piston unit of the double circulation valve plate type oil pressure damper is shown in figures 3, 4 and 5. In a non-working state, the second valve plate 52 is tightly attached to the lower end face of the piston 57, and the first valve plate 51 is tightly attached to the upper end face of the piston 57, so that a sealing effect is achieved, and oil liquid conduction on the upper side and the lower side of the piston is avoided. In order to ensure that the valve plate II 52 and the valve plate I51 can work independently in the stretching and compressing processes, a channel I54 and a channel II 55 are arranged on the piston 57, and the channel I54 and the channel II 55 are straight holes; one end of the first channel 54 is provided with a first groove 53, one end of the second channel 55 is provided with a second groove 56, and the first groove 53 and the second groove 56 are positioned at different ends of the piston 57, so that the clinging surfaces of the piston 57, the second valve plate 52 and the first valve plate 51 are discontinuous, independent oil channels are arranged in the stretching and compressing processes, and the two oil channels do not interfere with each other in the working process. Fig. 4 shows a piston 57 with a similar end face configuration, but with a similar end face configuration, it can be seen that the piston is very complex and is made of powder metallurgy material by die pressing and sintering, but the annular groove 58 requires additional subsequent machining.
Therefore, in the piston unit of the existing common double-circulation valve plate type oil pressure damper, the following problems exist in the piston processing: 1. the structure is complex, only a die can be adopted for pressing, the conventional machining method can not be realized almost, and the method is not suitable for the operation characteristics of small-batch production in the railway industry; 2. the single production is not suitable for realizing products with the same structure and different specifications.
Disclosure of Invention
The invention aims to provide a valve plate type piston unit of an oil pressure damper for a rail locomotive and a using method thereof, aiming at the defects of the prior art.
The invention adopts the following technical scheme:
the invention relates to a valve plate type piston unit of an oil pressure damper for a rail locomotive vehicle, which comprises a piston, a valve plate I and a valve plate II; the two ends of the piston are respectively provided with a boss I and a boss II which are integrally formed; the outer diameters of the first boss and the second boss are smaller than the outer diameter of the piston; the first boss and the second boss are both provided with annular grooves; the bottom of one annular groove is provided with a first inclined hole group, and the bottom of the other annular groove is provided with a second inclined hole group; the first inclined hole group consists of n inclined holes uniformly distributed along the circumferential direction, and n is more than or equal to 2; one end of the inclined hole I facing the boss II is opened at the outer edge of the boss; the second inclined hole group consists of n second inclined holes which are uniformly distributed along the circumferential direction, and one end of each second inclined hole, which faces the first boss, is opened at the outer edge of the first boss; the height difference between the part, located at the outer edge of the annular groove, of the end face of the first boss and the part, located at the inner edge of the annular groove, of the end face of the first boss is H1, and H1 is more than or equal to 0 and less than or equal to 0.6 mm; the height difference between the part, located at the outer edge of the annular groove, of the end face of the second boss and the part, located at the inner edge of the annular groove, of the end face of the second boss is H2, and H2 is more than or equal to 0 and less than or equal to 0.6 mm; the top of the annular groove provided with the inclined hole group I is provided with a valve plate I, and the top of the other annular groove is provided with a valve plate II.
Preferably, the outer diameters of the first boss and the second boss are equal.
Preferably, the central axes of the piston, the boss I, the boss II and the annular groove are collinear.
Preferably, the side wall of the piston is provided with an annular groove, and a piston ring is arranged in the annular groove.
The use method of the valve plate type piston unit of the oil pressure damper for the rail locomotive vehicle comprises the following specific steps:
fixedly assembling the valve plate type piston unit of the oil pressure shock absorber for the rail locomotive vehicle on a piston rod of the shock absorber, and enabling the valve plate II to face a lower cavity of the pressure cylinder; in the stretching process of the shock absorber, the valve plate I is closed, oil in the upper cavity of the pressure cylinder acts on the valve plate II through the inclined hole II, so that the valve plate II is bent and deformed to be opened, and the oil in the upper cavity of the pressure cylinder is unloaded through the inclined hole II and then enters the lower cavity of the pressure cylinder; the valve plate II has damping force after being opened; meanwhile, oil stored between the oil storage cylinder and the pressure cylinder is automatically supplemented to the lower cavity of the pressure cylinder through a bottom valve unit of the shock absorber. In the compression process of the shock absorber, the valve plate II is closed, oil in the lower cavity of the pressure cylinder acts on the valve plate I through the inclined hole I, so that the valve plate I is opened due to bending deformation, and part of the oil in the lower cavity of the pressure cylinder enters the upper cavity of the pressure cylinder; the valve plate I has damping force after being opened; meanwhile, the other part of oil in the lower cavity of the pressure cylinder enters an oil storage cavity between the oil storage cylinder and the pressure cylinder after being unloaded by a bottom valve unit of the shock absorber.
The invention has the following beneficial effects:
1. the valve plate I and the valve plate II are respectively tightly sealed with two end surfaces of the piston, are respectively provided with an independent inclined hole I and an independent inclined hole II which are used as oil passages and communicated with oil at the other end of the piston, do not interfere with each other during working, and can respectively establish damping force during stretching and compression of the shock absorber.
2. The piston has the advantages that the structure is simple, the structures of the two ends of the piston are the same, carbon steel or cast iron can be selected, the conventional machining method is adopted, the piston is flexible and convenient, and the piston is suitable for producing products with different specifications and the same structure; and aluminum alloy or powder metallurgy die pressing and then supplementary processing can also be adopted, so that the diversity of materials and processes is realized.
Drawings
FIG. 1 is a cross-sectional view of a prior art two-cycle valve plate type oil damper during a stretching process;
FIG. 2 is a cross-sectional view of a conventional dual-circulation valve plate type oil pressure damper during compression;
FIG. 3 is a schematic view of an assembly of a piston unit and a piston rod in a conventional dual-circulation valve plate type oil pressure damper;
FIG. 4 is a schematic end view of a piston unit in a conventional dual cycle disc oil hydraulic shock absorber;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a schematic end view of a piston unit of the present invention;
FIG. 7 is a sectional view taken along line B-B of FIG. 6 with both H1 and H2 being 0;
FIG. 8 is a cross-sectional view B-B of FIG. 6 when neither H1 nor H2 is 0;
fig. 9 is a schematic view of the assembly of the piston unit and the piston rod of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 6, 7, 8 and 9, the oil damper disc type piston unit for a rail locomotive according to the present invention includes a piston 57, a first valve disc 51 and a second valve disc 52; two ends of the piston 57 are respectively provided with a boss I513 and a boss II 59 which are integrally formed; the outer diameters of the first boss 513 and the second boss 59 are smaller than the outer diameter of the piston 57; the first boss 513 and the second boss 59 are both provided with annular grooves 510; the bottom of one annular groove 510 is provided with a first inclined hole group, and the bottom of the other annular groove 510 is provided with a second inclined hole group; the first inclined hole group consists of n first inclined holes 511 which are uniformly distributed along the circumferential direction, wherein n is more than or equal to 2; one end of the first inclined hole 511 facing the second boss 59 is opened at the outer edge of the second boss 59; the second inclined hole group consists of n second inclined holes 512 uniformly distributed along the circumferential direction, and one end of the second inclined hole 512 facing the first boss 513 is opened at the outer edge of the first boss 513; the height difference between the end face of the first boss 513 positioned at the outer edge part 5131 of the annular groove and the end face of the first boss positioned at the inner edge part 5132 of the annular groove is H1, and H1 is more than or equal to 0 and less than or equal to 0.6mm, so that the first valve plate 51 can reliably seal the first inclined hole group; the height difference between the end surface of the second boss 59 positioned at the outer edge part 591 of the annular groove and the end surface of the second boss positioned at the inner edge part 592 of the annular groove is H2, and H2 is more than or equal to 0 and less than or equal to 0.6mm, so that the reliable sealing of the second inclined hole group by the second valve plate 52 is realized; the top of the annular groove 510 provided with the first inclined hole group is provided with a first valve plate 51, and the top of the other annular groove 510 is provided with a second valve plate 52.
In a preferred embodiment, bosses one 513 and two 59 have equal outer diameters.
As a preferred embodiment, the central axes of piston 57, boss one 513, boss two 59, and annular groove 510 are collinear.
In a preferred embodiment, the side wall of the piston 57 is provided with an annular groove 58, and a piston ring is arranged in the annular groove.
The use method of the valve plate type piston unit of the oil pressure damper for the rail locomotive vehicle comprises the following specific steps:
the valve plate type piston unit of the oil pressure damper for the rail locomotive is fixedly assembled on a piston rod of the damper, and the valve plate II 52 faces to the lower cavity of the pressure cylinder, as shown in figures 1 and 8. In the stretching process of the shock absorber, the valve plate I51 is closed, oil in the upper cavity of the pressure cylinder 3 acts on the valve plate II 52 through the inclined hole II 512, so that the valve plate II 52 is bent and deformed to be opened, and the oil in the upper cavity of the pressure cylinder 3 is unloaded through the inclined hole II 512 and then enters the lower cavity of the pressure cylinder 3; the second valve plate 52 has damping force after being opened; meanwhile, the oil stored between the reserve tube 4 and the pressure tube 3 is automatically replenished to the lower chamber of the pressure tube 3 through the base valve unit 6 of the shock absorber. In the compression process of the shock absorber, the valve plate II 52 is closed, oil in the lower cavity of the pressure cylinder 3 acts on the valve plate I51 through the inclined hole I511, so that the valve plate I51 is bent and deformed to be opened, and part of the oil in the lower cavity of the pressure cylinder 3 enters the upper cavity of the pressure cylinder 3; the first valve plate 51 has damping force after being opened; meanwhile, the other part of oil in the lower cavity of the pressure cylinder 3 enters an oil storage cavity between the oil storage cylinder 4 and the pressure cylinder 3 after being unloaded by a bottom valve unit 6 of the shock absorber.
Therefore, the damper has the functions of a typical valve plate piston unit, the valve plate I51 and the valve plate II 52 are respectively tightly sealed with two end surfaces of the piston, and are respectively provided with the independent inclined hole I510 and the independent inclined hole II 511 which are used as oil passages and communicated with oil at the other end of the piston, so that the damper does not interfere with each other during working, and damping forces during stretching and compression of the damper can be respectively established.

Claims (5)

1. Oil pressure damper valve block formula piston unit for rail locomotive vehicle, including piston, valve block one and valve block two, its characterized in that: the two ends of the piston are respectively provided with a boss I and a boss II which are integrally formed; the outer diameters of the first boss and the second boss are smaller than the outer diameter of the piston; the first boss and the second boss are both provided with annular grooves; the bottom of one annular groove is provided with a first inclined hole group, and the bottom of the other annular groove is provided with a second inclined hole group; the first inclined hole group consists of n inclined holes uniformly distributed along the circumferential direction, and n is more than or equal to 2; one end of the inclined hole I facing the boss II is opened at the outer edge of the boss; the second inclined hole group consists of n second inclined holes which are uniformly distributed along the circumferential direction, and one end of each second inclined hole, which faces the first boss, is opened at the outer edge of the first boss; the height difference between the part, located at the outer edge of the annular groove, of the end face of the first boss and the part, located at the inner edge of the annular groove, of the end face of the first boss is H1, and H1 is more than or equal to 0 and less than or equal to 0.6 mm; the height difference between the part, located at the outer edge of the annular groove, of the end face of the second boss and the part, located at the inner edge of the annular groove, of the end face of the second boss is H2, and H2 is more than or equal to 0 and less than or equal to 0.6 mm; the top of the annular groove provided with the inclined hole group I is provided with a valve plate I, and the top of the other annular groove is provided with a valve plate II.
2. The oleo damper disc piston unit of claim 1, wherein: the outer diameters of the first boss and the second boss are equal.
3. The oleo damper disc piston unit of claim 1, wherein: the central axes of the piston, the boss I, the boss II and the annular groove are collinear.
4. The oleo damper disc piston unit of claim 1, wherein: an annular groove is formed in the side wall of the piston, and a piston ring is arranged in the annular groove.
5. The method of using an oleo damper disc piston unit for a rail rolling stock as set forth in claim 1, 2, 3 or 4 wherein: the method comprises the following specific steps:
fixedly assembling the valve plate type piston unit of the oil pressure shock absorber for the rail locomotive vehicle on a piston rod of the shock absorber, and enabling the valve plate II to face a lower cavity of the pressure cylinder; in the stretching process of the shock absorber, the valve plate I is closed, oil in the upper cavity of the pressure cylinder acts on the valve plate II through the inclined hole II, so that the valve plate II is bent and deformed to be opened, and the oil in the upper cavity of the pressure cylinder is unloaded through the inclined hole II and then enters the lower cavity of the pressure cylinder; the valve plate II has damping force after being opened; meanwhile, oil stored between the oil storage cylinder and the pressure cylinder is automatically supplemented to the lower cavity of the pressure cylinder through a bottom valve unit of the shock absorber; in the compression process of the shock absorber, the valve plate II is closed, oil in the lower cavity of the pressure cylinder acts on the valve plate I through the inclined hole I, so that the valve plate I is opened due to bending deformation, and part of the oil in the lower cavity of the pressure cylinder enters the upper cavity of the pressure cylinder; the valve plate I has damping force after being opened; meanwhile, the other part of oil in the lower cavity of the pressure cylinder enters an oil storage cavity between the oil storage cylinder and the pressure cylinder after being unloaded by a bottom valve unit of the shock absorber.
CN202011130937.2A 2020-10-21 2020-10-21 Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof Pending CN112145606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011130937.2A CN112145606A (en) 2020-10-21 2020-10-21 Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011130937.2A CN112145606A (en) 2020-10-21 2020-10-21 Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof

Publications (1)

Publication Number Publication Date
CN112145606A true CN112145606A (en) 2020-12-29

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ID=73954313

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011130937.2A Pending CN112145606A (en) 2020-10-21 2020-10-21 Valve plate type piston unit of oil pressure damper for railway locomotive and vehicle and using method thereof

Country Status (1)

Country Link
CN (1) CN112145606A (en)

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