Hydraulic composite bushing, runner for hydraulic composite bushing and forming method of runner
阅读说明:本技术 一种液压复合衬套、用于其的流道及流道的形成方法 (Hydraulic composite bushing, runner for hydraulic composite bushing and forming method of runner ) 是由 丁行武 卜继玲 程海涛 邹波 夏彰阳 邹纪操 于 2020-05-27 设计创作,主要内容包括:本发明提出了一种液压复合衬套,包括:芯轴;设置在所述芯轴的外周表面上的橡胶体,所述橡胶体构造有两个径向相对分布的凹腔;两个彼此间隔开套设在所述橡胶体上的支撑环;以及以过盈配合方式压装在所述支撑环的径向外侧的外套;其中,所述外套覆盖所述凹腔而在所述橡胶体与所述外套之间形成两个用于容纳液压流体的液压腔体,且所述支撑环构造有供液压流体过流的流道,两个所述液压腔体通过所述流道彼此连通,在所述外套与所述凹腔的连接处分别对应设有密封装置,从而对所述液压腔体形成密封。本发明还提出了一种用于液压复合衬套的流道及流道的形成方法。(The invention provides a hydraulic composite bushing, comprising: a mandrel; the rubber body is arranged on the outer peripheral surface of the mandrel and is provided with two cavities which are distributed oppositely in the radial direction; two support rings which are arranged on the rubber body at intervals; the outer sleeve is pressed on the radial outer side of the support ring in an interference fit mode; the outer sleeve covers the concave cavity, two hydraulic cavities for containing hydraulic fluid are formed between the rubber body and the outer sleeve, a flow passage for flowing of the hydraulic fluid is formed in the support ring, the two hydraulic cavities are communicated with each other through the flow passage, and sealing devices are correspondingly arranged at the connecting positions of the outer sleeve and the concave cavity respectively so as to seal the hydraulic cavities. The invention also provides a flow passage for the hydraulic composite bushing and a forming method of the flow passage.)
1. A hydraulic composite bushing, comprising:
a mandrel (10);
a rubber body (20) arranged on the outer peripheral surface of the mandrel, said rubber body being configured with two cavities distributed diametrically opposite;
two support rings (30) arranged on the rubber body at intervals; and
an outer sleeve (40) press-fitted in a radially outer side of the support ring in an interference fit manner;
wherein the outer sleeve covers the cavity to form two hydraulic chambers (21) for receiving hydraulic fluid between the rubber body and the outer sleeve, and the support ring is configured with a flow channel (70) through which the hydraulic fluid flows, the two hydraulic chambers communicating with each other through the flow channel,
and sealing devices are respectively and correspondingly arranged at the joints of the outer sleeve and the concave cavity, so that the hydraulic cavity is sealed.
2. The hydraulic composite bushing of claim 1, wherein the sealing arrangement includes a first seal (50) and a second seal (60) fitted with the first seal,
the first sealing piece is arranged on the peripheral surface of the rubber body in a matched mode, and the second sealing piece is installed with the first sealing piece in a matched mode, so that the sealing device can seal the concave cavity to form the hydraulic cavity.
3. The hydraulic composite bushing of claim 2, wherein the first seal is vulcanized as one piece with the rubber body and the support ring, and a first rubber layer (51) is provided between the mounting faces of the first and second seals.
4. The hydraulic composite bushing according to claim 2 or 3, wherein the first sealing element is configured in a cylindrical shape, two stepped holes for fitting the second sealing element are symmetrically formed in a side wall of the first sealing element, and the first rubber layer is disposed on a stepped surface of the stepped holes.
5. The hydraulic composite bushing according to claim 1, wherein the core shaft is configured as a stepped shaft having an intermediate boss, the rubber body is formed by vulcanization using rubber on an outer peripheral surface of the core shaft,
the diameter of the middle boss is configured to be gradually reduced and then gradually increased from two ends to the middle along the axial direction, and the rubber body is formed on the outer peripheral surface of the middle boss in a manner of being adapted to the contour of the middle boss.
6. The liquid composite bushing of claim 5, wherein an inner wall of the support ring is configured to conform to a peripheral profile of the intermediate boss.
7. The hydraulic composite bushing according to claim 1, wherein a first through hole and a second through hole are respectively provided in the outer sleeve and the side wall region of the second sealing member corresponding to the hydraulic chamber, the first through hole and the second through hole communicate to form a liquid injection port (23) communicating with the hydraulic chamber, and the liquid injection port is used for injecting hydraulic fluid into the hydraulic chamber.
8. The hydraulic composite bushing according to claim 7, wherein the liquid injection port is sealed by a ball-expansion high-pressure plug (231).
9. A flow passage for a hydraulic compound bushing according to any one of claims 1 to 8, the flow passage being configured to include a first sub-flow passage (71) and a second sub-flow passage (72) connected at both ends of the first sub-flow passage,
wherein the first sub-flow passage is formed on the outer surface of the support ring and extends along the circumferential direction, the two second sub-flow passages are formed inside the support ring and are respectively communicated with the corresponding hydraulic cavities in the rubber body, so that the two hydraulic cavities are communicated with each other through the flow passages,
one of the two support rings is provided with the flow channel.
10. The flow channel of claim 9, wherein said second sub-channel includes a first portion extending axially and a second portion communicating with said first portion and extending radially, said first portion communicating with a respective said hydraulic chamber and said second portion communicating with said first sub-channel.
11. The flow channel of claim 9, wherein a gasket (73) is fittingly mounted on an outer side of the first sub-flow channel, a second rubber layer (731) is vulcanized on an inner side of the gasket, and a seal is formed between the first sub-flow channel and the outer sleeve through the gasket.
12. A method of forming a flow channel according to any one of claims 9 to 11, comprising the steps of:
the first sub-flow passage is arranged on the peripheral surface of one support ring in a slotted mode, extends to two ends along the circumferential direction and corresponds to the hydraulic cavity in the circumferential direction respectively;
the second sub-flow passage is arranged in the support ring;
vulcanizing the support ring and the rubber body into a whole, and installing the sealing gasket on the outer side of the first sub-flow passage;
and press-fitting the outer sleeve on the radial outer side of the support ring in an interference fit manner, so that the sealing gasket forms press-fit sealing on the first sub-flow passage, and the flow passage is formed in the support ring.
Technical Field
The invention relates to a hydraulic composite bushing for a vehicle, in particular a rail vehicle. The invention also relates to a flow passage for a hydraulic composite bushing, and a method of forming a flow passage.
Background
A hydraulic bushing is a part widely used in vehicles (e.g., automobiles and railway vehicles), and is mainly installed on a suspension or a bogie of a vehicle to absorb vibration and impact, thereby improving the stability and safety of the vehicle in running. The hydraulic bushing generally comprises a mandrel, a rubber body and an outer sleeve sleeved on the outer side of the mandrel, two hydraulic cavities are arranged inside the rubber body and communicated with each other through a flow passage, and hydraulic fluid is filled in the hydraulic cavities. When the vehicle is in a special road section, the wheel drives the mandrel and the outer sleeve to move relatively, so that the hydraulic cavities correspondingly expand and contract, and hydraulic fluid can flow between the two hydraulic cavities. Therefore, rigidity adjustment of the hydraulic bushing is realized, and the train keeps stable operation.
In practical application, when hydraulic fluid flows through the flow passage, the hydraulic fluid is easy to flow out of contact gaps between the flow passage and other parts, and the hydraulic fluid can transversely float among the flow passage grooves, so that the working performance of the hydraulic bushing is seriously influenced. Therefore, the sealing requirements for the flow passages for communicating the two hydraulic chambers are high.
The existing hydraulic bushing usually arranges the flow channel on the surface of the mandrel or the support ring, and then the flow channel is directly pressed and mounted through the rubber body or the outer sleeve, so that the flow channel forms a seal. However, the hydraulic bushing is affected by the load and vibration during operation, the volume of the hydraulic cavity is changed continuously, and the pressure of the hydraulic fluid in the hydraulic cavity is high, so that the pressure of the hydraulic fluid is increased rapidly. This makes current runner sealing mode can't satisfy sealed requirement, leads to the fluid in the runner horizontal cluster to leak, can't realize effectual sealed, has seriously influenced hydraulic liner's sealing performance, and this has greatly influenced hydraulic liner's rigidity regulation and life.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a hydraulic composite bushing, which can effectively improve the overall sealing effect of a hydraulic cavity, thereby improving the rigidity adjustment performance of the hydraulic composite bushing.
The invention also provides a runner for the hydraulic bushing and a forming method of the runner, the runner can effectively improve the sealing performance and bear the liquid pressure, and the forming method of the runner effectively ensures the sealing performance of the runner and further improves the rigidity adjusting performance of the hydraulic composite bushing.
To this end, the invention proposes a hydraulic composite bushing comprising: a mandrel; the rubber body is arranged on the outer peripheral surface of the mandrel and is provided with two cavities which are distributed oppositely in the radial direction; two support rings which are arranged on the rubber body at intervals; the outer sleeve is pressed on the radial outer side of the support ring in an interference fit mode; the outer sleeve covers the concave cavity, two hydraulic cavities for containing hydraulic fluid are formed between the rubber body and the outer sleeve, a flow passage for flowing of the hydraulic fluid is formed in the support ring, the two hydraulic cavities are communicated with each other through the flow passage, and sealing devices are correspondingly arranged at the connecting positions of the outer sleeve and the concave cavity respectively so as to seal the hydraulic cavities.
In one embodiment, the sealing device comprises a first sealing element and a second sealing element, wherein the first sealing element is arranged on the outer peripheral surface of the rubber body in a fitting mode, and the second sealing element is mounted with the first sealing element in a fitting mode, so that the sealing device forms a seal for the cavity to form the hydraulic cavity.
In one embodiment, the first seal is vulcanized integrally with the rubber body and the support ring, and a first rubber layer is disposed between the mounting faces of the first seal and the second seal.
In one embodiment, the first sealing element is configured to be cylindrical, two stepped holes for adapting and mounting the second sealing element are symmetrically arranged on the side wall of the first sealing element, and the first rubber layer is arranged on the stepped surface of the stepped hole.
In one embodiment, the mandrel is configured as a stepped shaft with a middle boss, the rubber body is formed on the outer peripheral surface of the mandrel in a vulcanization mode by using rubber, the diameter of the middle boss is configured to be gradually reduced from two ends to the middle along the axial direction and then gradually increased, and the rubber body is formed on the outer peripheral surface of the middle boss in a manner of adapting to the contour of the middle boss.
In one embodiment, the inner wall of the support ring is configured to be able to conform to the peripheral profile of the intermediate boss.
In one embodiment, a first through hole and a second through hole are respectively formed in the outer sleeve and the side wall area of the second sealing member corresponding to the hydraulic cavity, the first through hole is communicated with the second through hole to form a liquid injection port communicated with the hydraulic cavity, and the liquid injection port is used for injecting hydraulic fluid into the hydraulic cavity.
In one embodiment, the liquid injection port is sealed by a ball expansion type high-pressure plug.
According to the present invention, there is also provided a flow passage for the hydraulic composite bushing as described above, the flow passage being configured to include a first sub-flow passage and second sub-flow passages connected to both ends of the first sub-flow passage, wherein the first sub-flow passage is formed on an outer surface of the support ring and extends in a circumferential direction, and the two second sub-flow passages are formed inside the support ring and communicate with the corresponding hydraulic chambers inside the rubber body, respectively, such that the two hydraulic chambers communicate with each other through the flow passage, and one of the two support rings is provided with the flow passage.
In one embodiment, the second sub-flow passage comprises a first portion extending axially and a second portion communicating with the first portion and extending radially, the first portion communicating with the respective hydraulic chamber and the second portion communicating with the first sub-flow passage.
In one embodiment, a sealing gasket is fittingly installed on the outer side of the first sub-flow passage, a second rubber layer is vulcanized on the inner side of the sealing gasket, and a seal is formed between the first sub-flow passage and the outer sleeve through the sealing gasket.
According to the present invention, there is also provided a method of forming a flow channel as described above, comprising the steps of:
the first sub-flow passage is arranged on the peripheral surface of one support ring in a slotted mode, extends to two ends along the circumferential direction and corresponds to the hydraulic cavity in the circumferential direction respectively;
the second sub-flow passage is arranged in the support ring;
vulcanizing the support ring and the rubber body into a whole, and installing the sealing gasket on the outer side of the first sub-flow passage;
and press-fitting the outer sleeve on the radial outer side of the support ring in an interference fit manner, so that the sealing gasket forms press-fit sealing on the first sub-flow passage, and the flow passage is formed in the support ring.
Compared with the prior art, the invention has the advantages that:
the hydraulic composite bushing can effectively improve the overall sealing effect of the hydraulic cavity and can obviously improve the rigidity adjusting performance of the hydraulic composite bushing. The hydraulic composite bushing effectively ensures the sealing between the second sealing element and the rubber body through the sealing device, and effectively improves the sealing performance and the rigidity adjusting performance of the hydraulic composite bushing, thereby effectively avoiding the transverse leakage of fluid in a flow channel, bearing the pressure of the hydraulic fluid and greatly improving the sealing performance of the hydraulic composite bushing. According to the flow channel for the hydraulic composite bushing, the effective sealing is formed on the flow channel through the sealing gasket, the sealing performance can be effectively improved, the pressure of hydraulic fluid is borne, the sealing performance of the hydraulic composite bushing is further enhanced, the rigidity adjusting performance of the hydraulic composite bushing is further improved, and the fatigue performance of a product is very favorably improved. The forming method of the flow passage has simple process, can obviously improve the sealing performance of the flow passage, further enhances the integral sealing performance of the hydraulic composite bushing, and further enhances the rigidity adjusting performance of the hydraulic composite bushing. In addition, the hydraulic composite bushing and the flow channel are simple in structure, remarkable in sealing effect and capable of effectively bearing the pressure of hydraulic fluid, so that the service lives of the hydraulic composite bushing and the flow channel are effectively prolonged.
Drawings
The invention will now be described with reference to the accompanying drawings.
FIG. 1 is an axial cross-sectional view of a hydraulic composite bushing according to the present invention.
Fig. 2 is a cross-sectional view taken along line B-B in fig. 1.
Fig. 3 is a cross-sectional view taken along line C-C in fig. 1.
Fig. 4 is an enlarged view of an area indicated by E in fig. 2.
Fig. 5 shows a perspective structure of the first sealing member.
Fig. 6 shows the structure of the second seal.
Fig. 7 is an enlarged view of an area indicated by F in fig. 2.
Fig. 8 shows the structure of an embodiment of the rubber body, the first seal member and the second seal member.
Fig. 9 schematically shows the structure of the flow channel and the gasket on the support ring in an unassembled state.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
It should be noted that the terms "axial direction" and "radial direction" in the present application refer to the horizontal and vertical directions in fig. 2, respectively, and define the radial direction of the
FIG. 1 is an axial cross-sectional view of a
According to the invention, the
As shown in fig. 1 and 2, the
In the present embodiment, a
In practical application, under some special conditions of the rail train, the movement of the wheels drives the
According to the invention, sealing means are provided at the connection of the
As shown in fig. 2 to 4, the sealing device includes a first sealing
Fig. 5 and 6 show the perspective structures of the first and
According to the invention, the
As shown in fig. 7, a first through hole and a second through hole are provided in the
In one embodiment, the
According to the present invention, the flow passage 70 is provided on the
As shown in fig. 4, the second sub-flow passage 72 is configured to include a first portion extending in the axial direction, which communicates with the corresponding
According to the present invention, a
A method of forming the flow passage 70 for a hydraulic composite bushing according to the present invention is described below. First, the first
The hydraulic
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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