CN218817807U - Damping piston - Google Patents

Damping piston Download PDF

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Publication number
CN218817807U
CN218817807U CN202223349654.4U CN202223349654U CN218817807U CN 218817807 U CN218817807 U CN 218817807U CN 202223349654 U CN202223349654 U CN 202223349654U CN 218817807 U CN218817807 U CN 218817807U
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China
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annular groove
piston body
along
piston
convex ring
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CN202223349654.4U
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Chinese (zh)
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耿保金
张继文
许兴炜
徐国良
纪康辉
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Suzhou University
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Suzhou University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The utility model discloses a damping piston, which comprises a piston body and a sealing ring; the outer peripheral surface of the piston body is provided with a first annular groove and a second annular groove, the area, located between the first annular groove and the second annular groove, of the piston body is a central area, and the sealing ring is sleeved on the piston body in a sealing mode and covers the first annular groove and the second annular groove in a sealing mode; the piston body is provided with a first channel and a second channel along the axial direction, and the piston body is provided with a first middle channel communicated between the first channel and the first annular groove and a second middle channel communicated between the second channel and the second annular groove. The utility model discloses a hydraulic pressure compensation to the sealing washer middle part improves sealed effect.

Description

Damping piston
Technical Field
The utility model belongs to the technical field of the motor vehicle, a damping piston is related to.
Background
The hydraulic damper is applied to various scenes, for example, the hydraulic damper is arranged for ensuring a certain part in equipment with serious vibration, the existing hydraulic damper generally enables the piston to be in sealing fit with the inside of the piston cylinder through a sealing ring, the sealing ring continuously rubs the inner wall of the piston cylinder in continuous compression and recovery strokes, and hydraulic oil generates liquid leakage through a gap between the piston and the piston cylinder to be gradually obvious due to the existence of pressure difference of liquid cavities on two sides of the piston in the piston cylinder in the compression and recovery strokes, so that the sealing effect of the sealing ring is poor.
Therefore, a damping piston is needed, which can improve the liquid flowing phenomenon between the piston and the piston cylinder by hydraulic compensation to ensure better damping effect.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a damping piston improves the liquid flow phenomenon between piston and the piston cylinder through hydraulic pressure compensation to guarantee better shock attenuation effect.
The utility model discloses a damping piston, which comprises a piston body and a sealing ring;
a first annular groove and a second annular groove are formed in the outer peripheral surface of the piston body, the first annular groove and the second annular groove are arranged in an axial direction of the piston body, the first annular groove is located on one side, close to the upper end of the piston body, of the second annular groove, the area, located between the first annular groove and the second annular groove, of the piston body is a central area, and the sealing ring is sleeved on the piston body in a sealing mode and covers the first annular groove and the second annular groove in a sealing mode;
the piston body is provided with a first channel and a second channel along the axial direction, and the piston body is provided with a first middle channel communicated between the first channel and the first annular groove and a second middle channel communicated between the second channel and the second annular groove.
Further, the inner peripheral surface of the sealing ring is provided with an upper convex ring and a lower convex ring which are convex inwards along the radial direction, the upper convex ring extends into the first annular groove, a gap is formed between the upper convex ring and the side wall of the first annular groove, which is close to the upper end of the piston body along the axial direction, a gap is formed between the inner peripheral wall of the upper convex ring and the groove bottom of the first annular groove, and the first middle channel is communicated to the groove bottom of the first annular groove;
further, the inner peripheral surface of the sealing ring is provided with a lower convex ring which protrudes inwards in the radial direction, the lower convex ring extends into the second annular groove, a gap is formed between the lower convex ring and the side wall of the second annular groove, close to the lower end of the piston body, in the axial direction, a gap is formed between the inner peripheral wall of the lower convex ring and the groove bottom of the second annular groove, and the second middle channel is communicated to the groove bottom of the second annular groove.
Further, the upper convex ring is in sealing fit with the side wall of the first annular groove, which is far away from the upper end of the piston body along the axial direction; the lower convex ring is in sealing fit with the side wall of the second annular groove, which is far away from the lower end of the piston body along the axial direction.
Furthermore, the upper edge of the inner circumferential surface of the upper convex ring is provided with an upper chamfer surface, and the first middle channel is opposite to the upper chamfer surface along the radial direction; the lower edge of the inner circumferential surface of the lower end ring is provided with a lower chamfer surface, and the second middle channel is opposite to the lower chamfer surface along the radial direction.
Further, a plurality of annular meshing grooves are formed in the outer peripheral surface of the central area, the meshing grooves extend along the circumferential direction of the central area and are arranged in an axial direction, a plurality of annular meshing teeth are arranged on the inner peripheral surface of the sealing ring, and the meshing teeth are matched with the meshing grooves one by one and are in conformal fit with the meshing grooves.
Further, the upper end of the sealing ring extends along the radial direction and is in sealing fit with the upper end face of the piston body, and/or the lower end of the sealing ring extends along the radial direction and is in sealing fit with the lower end face of the piston body.
Furthermore, the first channels are arranged in a plurality, the first channels are arranged at intervals along the circumferential direction, the first middle channels extend along the radial direction, and the first middle channels are matched with the first channels one by one and distributed radially.
Furthermore, the second passageway is provided with a plurality ofly, each the second passageway sets up along circumference equidistance interval, the second intermediate passage is along radially extending, the second intermediate passage with the second passageway matches one by one and is radial distribution.
Further, the number of the first channels is the same as that of the second channels, and the first channels and the second channels are arranged in a staggered mode along the circumferential direction.
The utility model has the advantages that:
the utility model discloses a first annular groove and second annular groove are sealed back by the sealing washer, sealed pressurize district has then been formed, when the piston body is down for compression stroke, then hydraulic pressure grow of hydraulic chamber I down, the high-pressure liquid of hydraulic chamber I flows to first annular groove in through the lower extreme of first passageway down, because the liquid flow of hydraulic chamber I down has damping loss in to first annular groove, the hydraulic pressure of first annular groove is less than the hydraulic pressure of hydraulic chamber I down this moment, opening pressure through the check valve of the upper end A department that sets up first passageway, the hydraulic pressure of guaranteeing first annular groove is greater than the hydraulic pressure of hydraulic chamber II, then formed tertiary degressive hydraulic pressure district step by step on the axial direction of lower extreme to the upper end at the sealing washer edge, wherein the hydraulic pressure difference between first annular groove and the lower hydraulic chamber I diminishes, and the hydraulic pressure difference between first annular groove and the last hydraulic chamber II diminishes, the hydraulic pressure through the hydraulic compensation to the sealing washer middle part in order to improve the liquid flow phenomenon in piston and piston section of thick bamboo gap. In the same way, when the piston body is in a recovery stroke, a hydraulic area is also formed in the second annular groove, and the hydraulic compensation is performed on the middle part of the sealing ring so as to improve the liquid flowing phenomenon of a gap between the piston and the piston cylinder.
Drawings
The invention is further described with reference to the following figures and examples.
FIG. 1 is a schematic view of the overall structure of a damping piston;
fig. 2 is a partial structural schematic diagram.
Detailed Description
The embodiment provides a damping piston, which comprises a piston body 10 and a sealing ring 20;
a first annular groove 11 and a second annular groove 12 are formed in the outer peripheral surface of the piston body 10, the first annular groove 11 and the second annular groove 12 are arranged in an axial direction of the piston body 10, the first annular groove 11 is located on one side, close to the upper end of the piston body 10, of the second annular groove 12, a central area 13 is located in an area, located between the first annular groove 11 and the second annular groove 12, of the piston body 10, and the sealing ring 20 is hermetically sleeved on the piston body 10 and hermetically covers the first annular groove 11 and the second annular groove 12;
the piston body 10 is axially provided with a first channel 14 and a second channel 15, and the piston body 10 is provided with a first intermediate channel 16 communicated between the first channel 14 and the first annular groove 11, and a second intermediate channel 17 communicated between the second channel 15 and the second annular groove 12.
Referring to fig. 1, a piston body 10 is installed in a piston cylinder 30, and a seal ring 20 is sealed between the piston body 10 and an inner wall of the piston cylinder 30; in the normal use process, the first channel 14 and the second channel 15 need to be matched with one-way valves for use, wherein the one-way valves are installed at the upper end a position of the first channel 14 and the lower end B position of the second channel 15, at this time, the first channel 14 is used for enabling liquid to flow in one way from the lower end of the piston body 10 to the upper end, and the second channel 15 is used for enabling liquid to flow in one way from the upper end of the piston body 10 to the lower end; the first passage 14 and the second passage 15 are used together in a manner known in the art, for example, a reed structure is adopted for the check valve, and the details are not described herein.
After the check valve is installed in the above manner, the upper end of the first passage 14 is closed, the lower end of the second passage 15 is closed, the interior of the first passage 14 and the lower hydraulic chamber i of the piston cylinder are always kept unblocked, the interior of the second passage 15 and the upper hydraulic chamber ii are always kept unblocked, and therefore the lower hydraulic chamber i and the first intermediate passage 16 are kept unblocked, so that the lower hydraulic chamber i and the first annular groove 11 are kept communicated, and the upper hydraulic chamber ii and the second intermediate passage 17 are kept unblocked, so that the upper hydraulic chamber ii and the second intermediate passage 17 are kept communicated.
When the piston body moves downwards in a compression stroke, the hydraulic pressure of the lower hydraulic chamber I is increased, high-pressure liquid of the lower hydraulic chamber I flows into the first annular groove 11 through the lower end of the first channel 14, damping loss is caused when the liquid of the lower hydraulic chamber I flows into the first annular groove 11, the hydraulic pressure of the first annular groove 11 is smaller than that of the lower hydraulic chamber I, a check valve at the upper end A of the first channel 14 is set to ensure that the hydraulic pressure of the first annular groove 11 is larger than that of the upper hydraulic chamber II, a three-stage gradually-decreased hydraulic area is formed in the axial direction of the sealing ring 20 from the lower end to the upper end, the hydraulic pressure difference between the first annular groove 11 and the lower hydraulic chamber I is decreased, the hydraulic pressure difference between the first annular groove 11 and the upper hydraulic chamber II is decreased, and the phenomenon of liquid flow of a gap between the piston and the piston cylinder is improved by hydraulic compensation of the middle sealing ring. Similarly, when the piston body is in a recovery stroke, a hydraulic area is also formed in the second annular groove 12, and the hydraulic pressure in the middle of the sealing ring is compensated to improve the liquid flowing phenomenon of the gap between the piston and the piston cylinder.
In this embodiment, the inner peripheral surface of the seal ring 20 has an upper protruding ring 21 and a lower protruding ring 22 protruding inward in the radial direction, the upper protruding ring 21 extends into the first annular groove 11, a gap is provided between the upper protruding ring 21 and a side wall a of the first annular groove 11 near the upper end of the piston body 10 in the axial direction, a gap is provided between the inner peripheral wall of the upper protruding ring 21 and the groove bottom of the first annular groove 11, and the first intermediate passage 16 is communicated to the groove bottom of the first annular groove 11. The inner peripheral surface of the seal ring 20 has a lower collar 22 protruding radially inward, the lower collar 22 extends into the second annular groove 12, a gap is provided between the lower collar 22 and a side wall c of the second annular groove 12 near the lower end of the piston body 10 in the axial direction, a gap is provided between the inner peripheral wall of the lower collar 22 and a groove bottom d of the second annular groove 12, and the second intermediate passage 17 is communicated to the groove bottom of the second annular groove 12.
Referring to fig. 2, the upper protruding ring 21 is disposed such that the hydraulic pressure in the first annular groove 11 provides an axial hydraulic pressure for the sealing ring 20 to reduce the axial pressure difference of the sealing ring, and the upper protruding ring 21 is disposed without blocking the first intermediate passage 16. Likewise, the lower collar 22 is arranged such that hydraulic pressure in the second annular groove 12 provides axial hydraulic pressure to the seal ring 20 to reduce the axial differential pressure of the seal ring, and the lower collar 22 is arranged so as not to block the first intermediate passage 16.
In this embodiment, the upper protruding ring 21 is sealed and attached to the side wall e of the first annular groove 11, which is axially far away from the upper end of the piston body 10; the lower protruding ring 22 is sealingly engaged with the side wall f of the second annular groove 12 axially away from the lower end of the piston body 10. The upper edge of the inner peripheral surface of the upper convex ring 21 is provided with an upper chamfer surface 23, and the first middle channel 16 is opposite to the upper chamfer surface 23 along the radial direction; the lower edge of the inner peripheral surface of the lower end ring 22 is provided with a lower chamfer surface 24, and the second middle channel 17 is opposite to the lower chamfer surface 24 in the radial direction.
Referring to fig. 2, in a compression stroke lower behavior example of the piston body, the high-pressure fluid in the first middle channel 16 enters the first annular groove 11 and radially faces the upper chamfer surface 23, so as to provide a pressure radially pressing the inner wall of the piston and a pressure axially pressing the side wall e for the upper convex ring 21, thereby ensuring the sealing fit between the sealing ring 20 and the piston body and the inner wall of the piston cylinder, so as to achieve the effect of improving the sealing, and the arrangement of the upper chamfer surface 23 is also beneficial to ensuring sufficient axial pressure of the upper convex ring 21, so as to reduce the axial pressure difference of the sealing ring; similarly, when the piston body is formed by restoration, the sealing ring 20 is also tightly attached to the piston body and the inner wall of the piston cylinder through the lower chamfer surface 24, so that the sealing effect is improved, and the axial sufficient pressure of the lower convex ring 22 is favorably ensured through the arrangement of the lower chamfer surface 24, so that the axial pressure difference of the sealing ring is reduced.
In this embodiment, the outer circumferential surface of the central area 13 is provided with a plurality of annular engaging grooves 18, each engaging groove 18 extends along the circumferential direction of the central area 13 and is axially arranged, the inner circumferential surface of the sealing ring 20 is provided with a plurality of annular engaging teeth 25, and each engaging tooth 25 is matched with each engaging groove 18 one by one and is in form fit. Referring to fig. 1 and 2, the axial area of the central area 13 is larger, and the axial dimension of the central area 13 is larger than half of the axial length of the entire piston body, and the central area is used as a sealing area of the core. The cross sections of the meshing teeth and the meshing grooves are rectangular, the specific number of the meshing teeth and the meshing grooves is not particularly limited, and the arrangement of the meshing teeth and the meshing grooves is favorable for mounting the sealing ring.
In this embodiment, the upper end of the sealing ring 20 extends in the radial direction and is in sealing fit with the upper end surface of the piston body 10, and/or the lower end of the sealing ring 20 extends in the radial direction and is in sealing fit with the lower end surface of the piston body 10. It is favorable to improving sealed effect through this structure.
In this embodiment, the first channels 14 are provided in plurality, each of the first channels 14 is arranged at equal intervals along the circumferential direction, the first intermediate channels 16 extend in the radial direction, and each of the first intermediate channels 16 is radially distributed in a one-to-one matching manner with each of the first channels 14. The number of the second passages 15 is multiple, the second passages 15 are arranged at equal intervals along the circumferential direction, the second middle passages 17 extend along the radial direction, and the second middle passages 17 are matched with the second passages 15 one by one and are distributed in a radial shape. The number of the first channels 14 and the second channels 15 is the same, and the first channels 14 and the second channels 15 are arranged in a staggered manner along the circumferential direction. This arrangement ensures a uniform pressure in the circumferential direction in the first annular groove 11 and the second annular groove 12.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. A damping piston, characterized by: comprises a piston body and a sealing ring;
a first annular groove and a second annular groove are formed in the outer peripheral surface of the piston body, the first annular groove and the second annular groove are arranged in an axial direction of the piston body, the first annular groove is located on one side, close to the upper end of the piston body, of the second annular groove, the area, located between the first annular groove and the second annular groove, of the piston body is a central area, and the sealing ring is sleeved on the piston body in a sealing mode and covers the first annular groove and the second annular groove in a sealing mode;
the piston body is provided with a first channel and a second channel along the axial direction, and the piston body is provided with a first middle channel communicated between the first channel and the first annular groove and a second middle channel communicated between the second channel and the second annular groove.
2. The damping piston of claim 1, wherein: the inner peripheral surface of the sealing ring is provided with an upper convex ring and a lower convex ring which are protruded inwards along the radial direction, the upper convex ring extends into the first annular groove, a gap is formed between the upper convex ring and the side wall of the first annular groove, which is close to the upper end of the piston body, along the axial direction, a gap is formed between the inner peripheral wall of the upper convex ring and the groove bottom of the first annular groove, and the first middle channel is communicated to the groove bottom of the first annular groove.
3. The damping piston of claim 2 wherein: the inner peripheral surface of the sealing ring is provided with a lower convex ring which is protruded inwards along the radial direction, the lower convex ring extends into the second annular groove, a gap is formed between the lower convex ring and the side wall of the second annular groove, close to the lower end of the piston body, along the axial direction, a gap is formed between the inner peripheral wall of the lower convex ring and the groove bottom of the second annular groove, and the second middle channel is communicated to the groove bottom of the second annular groove.
4. The damping piston of claim 3, wherein: the upper convex ring is in sealing fit with the side wall of the first annular groove, which is far away from the upper end of the piston body along the axial direction; the lower convex ring is closely attached to the side wall, far away from the lower end of the piston body, of the second annular groove in the axial direction.
5. The damping piston of claim 4 wherein: the upper edge of the inner circumferential surface of the upper convex ring is provided with an upper chamfer surface, and the first middle channel is opposite to the upper chamfer surface along the radial direction; the lower edge of the inner circumferential surface of the lower convex ring is provided with a lower chamfer surface, and the second middle channel is opposite to the lower chamfer surface along the radial direction.
6. The damping piston of claim 1, wherein: the outer peripheral surface of the central area is provided with a plurality of annular occlusion grooves, each occlusion groove extends along the circumferential direction of the central area and is arranged along the axial direction, the inner peripheral surface of the sealing ring is provided with a plurality of annular occlusion teeth, and each occlusion tooth is matched with each occlusion groove in a one-to-one fit mode.
7. The damping piston of claim 1, wherein: the upper end of the sealing ring extends along the radial direction and is in sealing fit with the upper end face of the piston body, and/or the lower end of the sealing ring extends along the radial direction and is in sealing fit with the lower end face of the piston body.
8. The damping piston of claim 1 wherein: the first channels are arranged in a plurality of numbers, the first channels are arranged at intervals along the circumferential direction at equal intervals, the first middle channels extend along the radial direction, and the first middle channels are matched with the first channels one by one and distributed radially.
9. The damping piston of claim 8 wherein: the second passageway is provided with a plurality ofly, each the second passageway sets up along circumference equidistance interval, the second intermediate passage is along radially extending, the second intermediate passage with the second passageway matches one by one and is radial distribution.
10. The damping piston of claim 9, wherein: the number of the first channels is the same as that of the second channels, and the first channels and the second channels are arranged in a staggered mode along the circumferential direction.
CN202223349654.4U 2022-12-14 2022-12-14 Damping piston Active CN218817807U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223349654.4U CN218817807U (en) 2022-12-14 2022-12-14 Damping piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223349654.4U CN218817807U (en) 2022-12-14 2022-12-14 Damping piston

Publications (1)

Publication Number Publication Date
CN218817807U true CN218817807U (en) 2023-04-07

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ID=87044786

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223349654.4U Active CN218817807U (en) 2022-12-14 2022-12-14 Damping piston

Country Status (1)

Country Link
CN (1) CN218817807U (en)

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