CN112112923A - Multistage sealing method for cavity of liquid rubber composite node - Google Patents
Multistage sealing method for cavity of liquid rubber composite node Download PDFInfo
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- CN112112923A CN112112923A CN202010830125.2A CN202010830125A CN112112923A CN 112112923 A CN112112923 A CN 112112923A CN 202010830125 A CN202010830125 A CN 202010830125A CN 112112923 A CN112112923 A CN 112112923A
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- cover plate
- sealing
- step portion
- rubber
- spacer sleeve
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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
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
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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
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
- F16F13/1445—Units of the bushing type, i.e. loaded predominantly radially characterised by method of assembly, production or treatment
- F16F13/1454—Sealing of units
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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
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
- F16F13/1463—Units of the bushing type, i.e. loaded predominantly radially characterised by features of passages between working chambers
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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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/048—High viscosity, semi-solid pastiness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Gasket Seals (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
The invention discloses a multistage sealing method for a cavity in a liquid rubber composite node, which is characterized in that a step part on an intermediate spacer sleeve is designed into a multistage step part, after an arc-shaped cover plate is assembled on the multistage step part, the arc-shaped cover plate is connected with one step part of the multistage step by adopting metal interference fit, and the arc-shaped cover plate is connected with other step parts of the multistage step by adopting rubber overpressure fit. The invention can ensure that the sealing performance of the cavity can be ensured after the liquid rubber composite node is used for a long time, and the risk that liquid in the cavity can leak out of the cavity is avoided.
Description
Technical Field
The invention relates to a sealing method, in particular to a multistage sealing method for a cavity in a liquid rubber composite node.
Background
According to the dynamic requirement, when the rotating arm node is in linear high-speed operation (high-frequency vibration), larger radial rigidity is provided to ensure the operation stability, and the critical speed is improved; when passing a curve (low frequency and large amplitude), smaller rigidity performance is provided to ensure the performance of passing the curve, and abrasion is reduced; the common node is difficult to realize the characteristics, and particularly for old lines, large abrasion of wheel rails and lines and high maintenance cost, a new product is required to be used, and the liquid rubber composite node with the characteristics is also required to be used.
The liquid rubber composite rotating arm node working principle is as follows: two hollow cavity structures are designed in the rubber part, the two cavities are communicated through a flow passage design, and a sealed incompressible (viscous) liquid is filled in a cavity in advance. Under the action of load, the volumes in the two cavities change, and liquid flows between the two cavities to generate damping, so that vibration energy is consumed, and the aim of damping vibration is fulfilled. During low-frequency vibration, liquid flows up and down through the channel to play a role in large damping, liquid in a high-frequency section cannot flow in time, the damping value is small, vibration is effectively isolated, dynamic stiffness under high-frequency vibration is basically stable and unchanged, and the function of preventing dynamic hardening is played. The frequency ratio of the system is basically kept unchanged, and a good vibration reduction effect is still achieved.
The applicant filed in 2019 the following patents on liquid rubber coincident nodes, which are listed as the following ten patents:
the utility model discloses a chinese utility model patent of a, publication number is CN210889875U, and the publication date is 2020, 6 months 30 days, and this patent discloses a liquid rubber compound node with body runner, including overcoat, dabber and well spacer sleeve, well spacer sleeve passes through rubber vulcanization bonding with the dabber and is in the same place, and well spacer sleeve assembles in the overcoat, is provided with the body runner in the dabber, still is provided with a plurality of spaces on well spacer sleeve, after vulcanizing, utilize rubber with a plurality of spaces form a plurality of liquid cavities of mutual independence, are provided with in a plurality of liquid cavities and are linked together through the body runner between liquid and a plurality of liquid cavities.
The invention discloses a method for forming a liquid rubber composite node with a pipe body flow channel, which is characterized in that a middle spacer sleeve is additionally arranged between an outer sleeve and a mandrel, the middle spacer sleeve and the mandrel are bonded together through rubber vulcanization, and then the middle spacer sleeve and the mandrel which are integrally formed are assembled into the outer sleeve; the core shaft is internally provided with a pipe body flow passage, the middle spacer sleeve is hollowed to form a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities are formed by rubber and the spaces, liquid is arranged in the liquid cavities, and the liquid cavities are communicated through the pipe body flow passage.
The invention discloses a method for forming a liquid rubber composite node with an outer groove runner, and the method is characterized in that a middle spacer sleeve is additionally arranged between an outer sleeve and a mandrel, the middle spacer sleeve and the mandrel are bonded together through rubber vulcanization, and then the middle spacer sleeve and the mandrel which are integrally formed are assembled into the outer sleeve; the outer sleeve is internally provided with an outer groove flow channel, the middle spacer sleeve is hollowed to form a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities are formed by rubber and the spaces, liquid is arranged in the liquid cavities, and the liquid cavities are communicated through the outer groove flow channel.
The invention discloses a method for forming a node flow channel of a liquid rubber composite node, which is disclosed by Chinese invention patent with the publication number of CN110500377A and the publication number of 2019, 11 and 26, and the method is characterized in that an outer sleeve is arranged into an inner sleeve and an outer sleeve, the inner sleeve is a flow channel outer sleeve, the outer sleeve is an integral sleeve, the outer peripheral surface of the flow channel outer sleeve is provided with flow channel grooves, the flow channel grooves are distributed on the outer peripheral surface of the flow channel outer sleeve in a surrounding manner, the integral sleeve is assembled on the flow channel outer sleeve, and the inner peripheral surface of the integral sleeve is used for shielding and sealing notches of the flow channel grooves to form the node flow channel, so that liquid can only flow in the length direction of the flow channel grooves, and a plurality of liquid cavities are.
The invention discloses a split type liquid rubber composite node with a damping through hole, which is a Chinese patent with the publication number of CN110499678A and the publication number of 2019, 11 and 26.A cover is sleeved outside the cover plate and the middle spacer sleeve, wherein the liquid rubber composite node comprises an outer sleeve, a cover plate, a middle spacer sleeve, a rubber body and a mandrel, the rubber body is vulcanized between the middle spacer sleeve and the mandrel, the cover plate covers the middle spacer sleeve, and the outer side of the cover plate and the middle spacer sleeve is sleeved with the outer sleeve; a liquid cavity is formed between the cover plate and the rubber body, the liquid cavity is separated by the middle spacer sleeve, liquid channels are formed in the rubber body and the mandrel, and the liquid cavities which are separated from each other are communicated with the liquid channels.
Sixthly, the disclosure number is CN110486412A, and the disclosure date is 2019, 11, 22, the patent discloses a radial rigidity adjusting method of a liquid rubber composite node, wherein the liquid rubber composite node comprises a runner jacket, a cover plate, a middle spacer sleeve, a rubber body and a mandrel, the rubber body is vulcanized between the middle spacer sleeve and the mandrel, two ends of the cover plate are covered on the middle spacer sleeve, and the cover plate, the middle spacer sleeve, the rubber body and the mandrel are assembled into the runner jacket; a liquid cavity is formed between the cover plate and the rubber body, the liquid cavity is separated by the middle spacer sleeve, liquid channels are formed in the cover plate and the flow channel outer sleeve, the liquid channels are communicated with the mutually separated liquid cavities, liquid is injected into the liquid cavity and the liquid channels, and the air rigidity of the liquid rubber composite node in the radial direction is adjusted by changing the shapes and the sizes of the liquid cavity and the liquid channels.
Seventhly, the Chinese patent with the publication number of CN110469623A and the publication number of 2019, 11 and 19, discloses a method for forming a liquid rubber composite node with a middle damping hole, wherein a middle spacer sleeve is additionally arranged between an outer sleeve and a mandrel, the middle spacer sleeve and the mandrel are bonded together through rubber vulcanization, and then the middle spacer sleeve and the mandrel which are integrally formed are assembled into the outer sleeve; the core shaft is provided with a damping through hole penetrating through the core shaft, the middle spacer sleeve is hollowed to form a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities are formed by rubber and the spaces, liquid is arranged in the liquid cavities, and the liquid cavities are communicated through the damping through hole.
Eighthly, the disclosure number is CN110454537A, and the disclosure date is 2019, 11, 15, the patent discloses a method for adjusting the rigidity of a split type liquid rubber composite node, wherein a closed cavity is formed in the liquid rubber composite node, liquid is injected into the closed cavity to form a radial rigidity adjusting structure, and the radial rigidity of the liquid rubber composite node is adjusted by adjusting the shape and the size of the closed cavity; the closed cavity is separated by the middle spacer sleeve, the middle spacer sleeve and the mandrel are vulcanized into a whole by the rubber body to form a radial real rigidity adjusting structure, and the radial real rigidity of the liquid rubber composite node is adjusted by adjusting the shape and the thickness of the rubber body in the radial direction.
Ninthly, a Chinese patent with publication number of CN110425248A and publication number of 2019, 11/8.2019, and the patent discloses a method for forming a liquid rubber composite node with an internal groove runner, wherein a middle spacer sleeve is additionally arranged between an outer sleeve and a mandrel, the middle spacer sleeve and the mandrel are bonded together through rubber vulcanization, and then the middle spacer sleeve and the mandrel which are integrally formed are assembled into the outer sleeve; the core shaft is internally provided with an inner groove flow passage, the middle spacer sleeve is hollowed to form a plurality of spaces, after vulcanization, a plurality of mutually independent liquid cavities are formed by rubber and the spaces, liquid is arranged in the liquid cavities, and the liquid cavities are communicated through the inner groove flow passage.
The invention discloses a sealing structure of a liquid cavity in a liquid rubber composite node, wherein the liquid rubber composite node comprises a flow channel outer sleeve, a cover plate, a middle spacer sleeve, a rubber body and a mandrel, the rubber body is vulcanized between the middle spacer sleeve and the mandrel, the liquid cavity is arranged between the cover plate and the rubber body, and the flow channel outer sleeve is sleeved outside the cover plate and the middle spacer sleeve; the both ends in the well spacer outside are equipped with the step mouth, are provided with the liquid passage who communicates with the liquid cavity on apron both ends and the runner overcoat, and apron both ends lid closes step mouth department be formed with step mouth seal structure, the liquid passage department on apron both ends and the runner overcoat is provided with liquid passage seal structure.
In the above patent document, when sealing the cavity formed in the liquid rubber composite node, the cavity includes two parts, namely, a cavity inner end and a cavity outer end, the cavity inner end is sealed by rubber, the cavity outer end is provided with a step portion at the cavity of the middle spacer bush, and after assembly, the rubber is pressed against the step portion of the middle spacer bush by an arc cover plate to be sealed (specifically, the detailed description will be given in a specific embodiment).
However, the applicant has found that over prolonged use of the liquid rubber composite node, there is a risk that liquid in the cavity will leak from the outside end of the cavity due to the relaxation of the rubber causing an interference press fit failure between the arcuate cover plate at the outside end of the cavity and the rubber.
In conclusion, how to design a sealing method for the hollow cavity of the liquid rubber composite node, especially to a sealing method for the outer end of the cavity, ensures that the sealing performance of the cavity can be ensured after the liquid rubber composite node is used for a long time, and avoids the risk that liquid in the cavity leaks out of the cavity is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a multistage sealing method for the cavity in the liquid rubber composite node, which can ensure the sealing performance of the cavity after the liquid rubber composite node is used for a long time and avoid the risk of liquid leakage from the cavity.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multistage sealing method for a cavity in a liquid rubber composite node is characterized in that a step part on a middle spacer sleeve is designed into a multistage step part, after an arc-shaped cover plate is assembled on the multistage step part, the arc-shaped cover plate is connected with one step part of the multistage step through metal interference fit, and the arc-shaped cover plate is connected with other step parts of the multistage step through rubber overpressure fit.
Preferably, the step part of one step that adopts metal interference fit to connect is the outside step that is close to overcoat one side, and the step parts of other grades that adopt rubber excessive pressure fit to connect are the inside step that is close to dabber one side, and the rubber coating is to the inside step.
Preferably, the step part on the outer side is provided with a glue groove, glue is coated in the glue groove, and after the metal interference fit connection is adopted, the glue in the glue groove is contacted with the arc-shaped cover plate.
Preferably, the step part on the outside is opened there is the seal groove, is provided with the sealing washer in the seal groove, after adopting metal interference fit to connect, the sealing washer is compressed tightly in the seal groove by the arc apron.
Preferably, a glue groove is formed in the outer step part, and glue is applied to the glue groove; the outer step portion is further provided with a sealing groove, a sealing ring is arranged in the sealing groove, and after the metal interference fit connection is adopted, glue in the glue groove is in contact with the arc-shaped cover plate, and the sealing ring is pressed in the sealing groove by the arc-shaped cover plate.
Preferably, a sealing bulge is formed on the rubber wrapped on the inner side step, a cover plate sealing groove matched with the sealing bulge is formed in the arc-shaped cover plate, and after the rubber is connected in an overpressure fit mode, the sealing bulge is pressed and contacted in the cover plate sealing groove.
Preferably, the multistage step is a two-stage step and comprises a spacer sleeve step part I and a spacer sleeve step part II, the spacer sleeve step part I is positioned at one side close to the outer sleeve, namely the outer side, and the spacer sleeve step part II is positioned at one side close to the mandrel, namely the inner side; the rubber is encapsulated to the step part II of the spacer sleeve, and the arc-shaped cover plate at the contact part with the step part is correspondingly arranged into a multi-stage step shape and comprises a cover plate step part I and a cover plate step part II; and an arc-shaped cover plate is covered on the step part in the assembling process, after the assembly, the first step part of the cover plate is connected with the first step part of the spacer bush in a metal interference fit mode, and the second step part of the cover plate is connected with the second step part of the spacer bush in an overpressure fit mode through rubber.
Preferably, a glue groove is formed in the first spacer sleeve step portion, glue is coated in the glue groove before assembly, and when the first spacer sleeve step portion is connected with the first spacer sleeve step portion in a metal interference fit mode, the glue is also in contact with the first cover plate step portion.
Preferably, a sealing groove is formed in the first spacer sleeve step portion, a sealing ring is assembled in the sealing groove before assembly, and when the first cover plate step portion and the first spacer sleeve step portion are connected in a metal interference fit mode in the assembly process, the sealing ring is also pressed in the sealing groove by the first cover plate step portion.
Preferably, a cover plate sealing groove is formed in the second cover plate step portion, when the rubber is encapsulated on the second spacer sleeve step portion, a sealing bulge is formed in the rubber, and when the second cover plate step portion is used for pressing the rubber on the second spacer sleeve step portion in the assembling process, the sealing bulge is located in the cover plate sealing groove and is in extrusion contact with the cover plate sealing groove.
The invention has the beneficial effects that: according to the invention, the step parts on the middle spacer sleeve are arranged into the multi-stage steps, after the assembly is completed, the arc-shaped cover plate is connected with the one-stage step part in the multi-stage steps in a metal interference fit manner, and the arc-shaped cover plate is connected with other multi-stage step parts in the multi-stage steps in a rubber overpressure fit manner, so that the problem of internal liquid leakage caused by the fact that the overpressure fit between metal and rubber fails due to the looseness of rubber after the liquid rubber composite node is used for a long time is avoided. On the basis of setting the step part on the middle spacer sleeve into the multistage step, further the arc-shaped cover plate is also set into the multistage step shape and is mutually matched with the multistage step part of the middle spacer sleeve, and the sealing effect is further increased. In order to maximize the sealing effect, the sealing structure is further optimized by adding the sealing bulges or the independent sealing rings on the rubber coating.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art node along the radial direction of a mandrel;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view in radial cross-section of the intermediate spacer sleeve and the arcuate cover plate of FIG. 1 shown unassembled into the outer sleeve;
FIG. 4 is an enlarged view of the portion B in FIG. 3;
FIG. 5 is an enlarged view of the portion C of FIG. 2;
FIG. 6 is a partial sectional structural view of a node cut along the axial direction of the mandrel in embodiment 1 of the present invention;
FIG. 7 is an enlarged schematic view of the portion H in FIG. 6;
fig. 8 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at the step part of the middle spacer sleeve in embodiment 2 of the present invention;
fig. 9 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at the step part of the middle spacer sleeve in embodiment 3 of the present invention;
fig. 10 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at the step part of the middle spacer sleeve in embodiment 4 of the present invention;
fig. 11 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 5 of the present invention;
fig. 12 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 6 of the present invention;
fig. 13 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 7 of the present invention;
fig. 14 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 8 of the present invention;
fig. 15 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 9 of the present invention;
fig. 16 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at the step part of the middle spacer sleeve in embodiment 10 of the present invention;
fig. 17 is a partial sectional structural view of a node which is cut along the axial direction of the mandrel and is located at a step portion of the middle spacer sleeve in embodiment 11 of the present invention;
in the figure: 1. the novel seal structure comprises an outer sleeve, 2a mandrel, 3a middle spacer sleeve, 4 rubber, 411 a seal protrusion, 5 a cavity, 6 a damping through hole, 7 an arc-shaped cover plate, 711 a cover plate step portion I, 712 a cover plate step portion II, 713 a cover plate step portion III, 8a step portion, 811 a spacer sleeve step portion I, 812 a spacer sleeve step portion II, 813 a spacer sleeve step portion III, 9 rubber, 10 a rubber groove, 11 a seal groove, 12a seal ring and 13 a cover plate seal groove.
Detailed Description
The technical solution of the present invention is further explained in detail with reference to the accompanying drawings and specific embodiments.
The existing liquid rubber composite node is shown in figures 1 and 2 and comprises an outer sleeve 1 and a mandrel 2, a middle spacer bush 3 is arranged between the outer sleeve 1 and the mandrel 2, the middle spacer bush 3 and the mandrel 2 are vulcanized and bonded together through rubber 4, and then the middle spacer bush 3 and the mandrel 2 which are formed into a whole are assembled in the outer sleeve 1; the middle spacer sleeve 3 is hollowed to form a plurality of spaces, after vulcanization, a plurality of independent liquid cavities 5 are formed by using rubber 4 and the spaces, liquid (not shown in the figure) is arranged in the liquid cavities 5, a channel communicated with the liquid cavities 5 is further arranged in a liquid rubber composite node, in the figure, the channel is a damping through hole 6 which is arranged on the mandrel 2 and penetrates through the mandrel 2, and the liquid cavities 5 are communicated through the damping through hole 6.
As shown in fig. 1 to 4, the liquid cavity is formed as follows: firstly, two spaces (such as spaces X1 and X2 in fig. 3) are dug out on the intermediate spacer 3, the spaces X1 and X2 are similar to through holes, the outer ends and the inner ends thereof are both open, here, one end of the space close to the mandrel 2 side is regarded as the inner end, and one end of the space far from the mandrel 2 side is regarded as the outer end, in order to ensure that the liquid cavity can store liquid, the openings at the two ends of each space need to be sealed so that each space can be formed independently, in the embodiment, when the openings at the inner ends of the spaces are sealed, the sealing is performed by using rubber 4, that is: after the mandrel 2 and the middle spacer sleeve 3 are vulcanized and bonded together through the rubber 4, the end port of the inner side of the space is sealed by the vulcanized rubber 4 through design; when the outer side end opening of the space is sealed, an arc-shaped cover plate 7 is additionally arranged on the hollowed middle spacer bush 3, and the outer side end opening of the space is sealed by the arc-shaped cover plate 7, so that each space forms an independent liquid cavity.
As shown in fig. 2 and 5, a step portion 8 is formed on the middle spacer 3 around the opening of the outer end of the space, the step portion 8 is provided with a whole circle along the opening of the outer end of the space, the arc-shaped cover plate 7 covers the step portion 8, and one function of the step portion 8 is used as a positioning structure to facilitate positioning and assembling of the arc-shaped cover plate 7. In this embodiment, the mandrel, the outer sleeve, the intermediate spacer sleeve and the arc-shaped cover plate can all be made of metal materials.
In this embodiment, step portion 8 is one-level step, rubber 4 rubber coating to step portion 8, during the assembly, firstly, through rubber 4 vulcanization becoming an organic whole with dabber 2 and hollow middle spacer 3, rubber coating to step portion 8 on, step portion 8 upper cover arc apron 7 again for arc apron 7 contacts with the rubber coating on step portion 8, again with the middle spacer 3 interference fit who has arc apron 7 in overcoat 1, utilize the effort that produces after the assembly to compress tightly arc apron 7 on step portion 8, make the rubber coating on step portion 8 produce the deformation, play sealed effect.
However, during long-term use, the rubber therein may be loosened, so that the sealing structure therein may be failed, resulting in leakage of liquid. In order to solve the problem, the applicant improves the method that the step part on the middle spacer sleeve is set into a multi-stage step, the multi-stage step is divided into an outer side step close to one side of the outer sleeve and an inner side step close to one side of the mandrel, rubber is wrapped on the inner side step, the arc-shaped cover plate is covered on the multi-stage step, and then the middle spacer sleeve with the arc-shaped cover plate is assembled into the outer sleeve in an interference fit mode. After the arc-shaped cover plate covers the multistage steps, the arc-shaped cover plate and the outer side steps are connected in a metal interference fit mode, and the arc-shaped cover plate and the inner side steps are connected in a rubber overpressure fit mode. By the arrangement, the problem that the internal liquid leaks due to the fact that over-pressure fit between metal and rubber fails after long-term use due to the fact that the rubber is loosened is avoided. The applicant has made further improvements on the design, and the following description is made separately by each specific embodiment.
Example 1: as shown in fig. 6 and 7, the step portion 8 provided on the intermediate spacer 3 is a two-step having a spacer step portion one 811 and a spacer step portion two 812, the spacer step portion one 811 being located on the side close to the outer jacket 1, i.e., the outer side, and the spacer step portion two 812 being located on the side of the mandrel, i.e., the inner side. The rubber 4 is encapsulated on the spacer step part two 812, and the arc-shaped cover plate 7 at the contact part of the step part is correspondingly arranged into a multi-step shape, and comprises a cover plate step part one 711 and a cover plate step part two 712. The arc-shaped cover plate 7 is covered on the step part 8 in the assembling process, after the assembling process, the first cover plate step part 711 and the first spacer sleeve step part 811 are connected in a metal interference fit mode, the second cover plate step part 712 and the second spacer sleeve step part 812 are connected in an overpressure fit mode through rubber and metal, and the rubber 4 is pressed on the second spacer sleeve step part 812 through the second cover plate step part 712.
After the integrated intermediate spacer sleeve and the mandrel are assembled in the outer sleeve 1, chamfering is carried out on the end part of the outer sleeve 1, which is in contact with the intermediate spacer sleeve 3, and then solid glue 9 is coated, so that the sealing effect is further improved.
Example 2: as shown in fig. 8, the difference from embodiment 1 is that: set up gluey groove 10 on spacer step portion 811, before the assembly, scribble solid glue 9 in gluey groove 10, adopt the metal interference fit mode to connect between apron step portion 711 and spacer step portion 811 during the assembly process, solid glue also contacts with apron step portion 711, further increases sealed effect.
Example 3: as shown in fig. 9, the difference from embodiment 1 is that: the sealing groove 11 is formed in the first spacer step portion 811, the sealing ring 12 is assembled in the sealing groove 11 before assembly, and when the first cover plate step portion 711 and the first spacer step portion 811 are connected in a metal interference fit mode in the assembly process, the sealing ring 12 is also pressed in the sealing groove 11 by the first cover plate step portion 711, so that the sealing effect is further improved.
Here, it should be noted that, the sealing effect can also be increased by combining embodiment 2 with embodiment 3, that is, a glue groove is formed on the first cover plate step 711, and glue is applied to the glue groove; a sealing groove is further formed in the first step 711 of the cover plate, a sealing ring is arranged in the sealing groove, and after the first step 711 of the cover plate is connected through metal interference fit, glue in the glue groove is in contact with the arc-shaped cover plate, and the sealing ring is pressed in the sealing groove by the arc-shaped cover plate (a schematic diagram is not given in the structure).
Example 4: as shown in fig. 10, the difference from embodiment 1 is that: and a cover plate sealing groove 13 is formed in the second cover plate step portion 712, when the rubber is encapsulated on the second spacer sleeve step portion 812, a sealing protrusion 411 is formed on the rubber 4, and when the second cover plate step portion 712 is used for pressing the rubber 4 on the second spacer sleeve step portion 812 in the assembling process, the sealing protrusion 411 is positioned in the cover plate sealing groove 13 and is in extrusion contact with the cover plate sealing groove 13.
Example 5: as shown in fig. 11, the difference from embodiment 1 is that: in this embodiment, the sealing forms in embodiments 2 and 4 may be combined, and the sealing effect is further enhanced, that is, the cover plate sealing groove 13 is formed in the cover plate step portion two 712, when the rubber is encapsulated on the spacer sleeve step portion two 812, the sealing protrusion 411 is formed on the rubber 4, and when the rubber 4 is pressed against the spacer sleeve step portion two 812 by the cover plate step portion two 712 in the assembling process, the sealing protrusion 411 is located in the cover plate sealing groove 13 and is pressed and contacted by the cover plate sealing groove 13. Set up gluey groove 10 on spacer step portion 811, before the assembly, scribble solid glue 9 in gluey groove 10, adopt the metal interference fit mode to connect between apron step portion 711 and spacer step portion 811 during the assembly process, solid glue also contacts with apron step portion 711, further increases sealed effect.
Example 6: as shown in fig. 12, the difference from embodiment 1 is that: in this embodiment, the sealing forms in embodiments 3 and 4 may be combined, and the sealing effect is further enhanced, that is, the cover plate sealing groove 13 is formed on the cover plate step portion two 712, when the rubber is encapsulated on the spacer sleeve step portion two 812, the sealing protrusion 411 is formed on the rubber 4, and when the rubber 4 is pressed against the spacer sleeve step portion two 812 by the cover plate step portion two 712 in the assembling process, the sealing protrusion 411 is located in the cover plate sealing groove 13 and is pressed and contacted by the cover plate sealing groove 13. The sealing groove 11 is formed in the first spacer step portion 811, the sealing ring 12 is assembled in the sealing groove 11 before assembly, and when the first cover plate step portion 711 and the first spacer step portion 811 are connected in a metal interference fit mode in the assembly process, the sealing ring 12 is also pressed in the sealing groove 11 by the first cover plate step portion 711, so that the sealing effect is further improved.
The arc-shaped cover plate 7 in the above-mentioned embodiment is provided with multiple steps, and here, the arc-shaped cover plate 7 can also be provided with only one step, as shown in the following embodiment:
example 7: as shown in fig. 13, the difference from embodiment 1 is that: the arc-shaped cover plate 7 is only arranged in a one-stage step shape and comprises a first cover plate step portion 711, the first cover plate step portion 711 and the first spacer sleeve step portion 811 are connected in a metal interference fit mode, and the first cover plate step portion 711 and the second spacer sleeve step portion 812 are connected in an overpressure fit mode through rubber and metal.
Example 8: as shown in fig. 14, the difference from example 7 is that: the sealing groove 11 is formed in the first spacer step portion 811, the sealing ring 12 is assembled in the sealing groove 11 before assembly, and when the first cover plate step portion 711 and the first spacer step portion 811 are connected in a metal interference fit mode in the assembly process, the sealing ring 12 is also pressed in the sealing groove 11 by the first cover plate step portion 711, so that the sealing effect is further improved.
Example 9: as shown in fig. 15, the difference from example 7 is that: set up gluey groove 10 on spacer step portion 811, before the assembly, scribble solid glue 9 in gluey groove 10, adopt the metal interference fit mode to connect between apron step portion 711 and spacer step portion 811 during the assembly process, solid glue also contacts with apron step portion 711, further increases sealed effect.
The above embodiments are all explained by designing the step part as a two-step, and the step part can also be designed as a three-step, a four-step, etc., and the three-step is taken as an example to be explained below.
Example 10: as shown in fig. 16, the step portion 8 provided on the intermediate spacer 3 is a three-step, and has a spacer step portion one 811, a spacer step portion two 812, and a spacer step portion three 813, the spacer step portion one 811 is located on the side close to the outer jacket 1, i.e., the outer side, and the spacer step portion two 812 and the spacer step portion three 813 are located on the side close to the mandrel, i.e., the inner side. The rubber 4 is encapsulated on the spacer step part two 812 and the spacer step part three 813, and the arc-shaped cover plate 7 at the contact part of the step parts is correspondingly arranged into a multi-step shape, and comprises a cover plate step part I711, a cover plate step part II 712 and a cover plate step part III 713. When the step part 8 is covered with the arc-shaped cover plate 7 in the assembling process, the first cover plate step part 711 and the first spacer sleeve step part 811 are connected in a metal interference fit mode, and the second cover plate step part 712 and the second spacer sleeve step part 812 as well as the third cover plate step part 713 and the third spacer sleeve step part 813 are connected in an overpressure fit mode through rubber and metal.
Example 11: as shown in fig. 17, the difference from embodiment 10 is that: set up gluey groove 10 on spacer step portion 811, before the assembly, scribble solid glue 9 in gluey groove 10, adopt the metal interference fit mode to connect between apron step portion 711 and spacer step portion 811 during the assembly process, solid glue also contacts with apron step portion 711, further increases sealed effect.
The structure design of adding a sealing ring and a sealing bulge in the three-level step design structure can be similar to the two-level step design structure. Similar sealing design can be performed in the four-step design structure like the two-step and three-step design structures, and the description is not repeated here.
In conclusion, the step parts on the middle spacer sleeve are arranged into the multistage steps, after the liquid rubber composite node is assembled, the arc-shaped cover plate is connected with one-stage step parts in the multistage steps in a metal interference fit mode, and the arc-shaped cover plate is connected with other multistage step parts in the multistage steps in a rubber overpressure fit mode, so that the problem that internal liquid leaks due to the fact that overpressure fit between metal and rubber fails due to the fact that rubber is loosened after the liquid rubber composite node is used for a long time is solved. On the basis of setting the step part on the middle spacer sleeve into the multistage step, further the arc-shaped cover plate is also set into the multistage step shape and is mutually matched with the multistage step part of the middle spacer sleeve, and the sealing effect is further increased. In order to maximize the sealing effect, the sealing structure is further optimized by adding the sealing bulges or the independent sealing rings on the rubber coating.
The term "multi-stage" as used in this embodiment means a number of "two or more stages". The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A multistage sealing method for a cavity in a liquid rubber composite node is characterized by comprising the following steps: the step portion that it was sheathe in with middle spacer establishes multistage step portion into, after the arc apron assembles multistage step portion on for adopt metal interference fit to connect and make and adopt rubber overpressure fit to connect between the arc apron and the step portion of other grades in the multistage step between one of them step portion in the arc apron and multistage step.
2. The multi-stage sealing method of claim 1, wherein: the step portion of one-level that adopts metal interference fit to connect is for being close to the outside step of overcoat one side, and the step portion of other grades that adopt rubber excessive pressure fit to connect is for being close to the inboard step of dabber one side, and the rubber coating is to inboard step on.
3. The multi-stage sealing method according to claim 2, wherein: and a glue groove is formed in the step part on the outer side, glue is coated in the glue groove, and after the metal interference fit connection is adopted, the glue in the glue groove is contacted with the arc-shaped cover plate.
4. The multi-stage sealing method according to claim 2, wherein: the outer step portion is provided with a sealing groove, a sealing ring is arranged in the sealing groove, and after the sealing groove is connected in a metal interference fit mode, the sealing ring is pressed in the sealing groove by the arc-shaped cover plate.
5. The multi-stage sealing method according to claim 2, wherein: a glue groove is formed in the step part on the outer side, and glue is coated in the glue groove; the outer step portion is further provided with a sealing groove, a sealing ring is arranged in the sealing groove, and after the metal interference fit connection is adopted, glue in the glue groove is in contact with the arc-shaped cover plate, and the sealing ring is pressed in the sealing groove by the arc-shaped cover plate.
6. The multistage sealing method according to any one of claims 3 to 5, characterized in that: the rubber wrapped on the inner side step is provided with a sealing bulge, the arc-shaped cover plate is provided with a cover plate sealing groove matched with the sealing bulge, and after the rubber is connected in an overpressure matching mode, the sealing bulge is pressed and contacted in the cover plate sealing groove.
7. The multi-stage sealing method according to claim 2, wherein: the multistage step is a two-stage step and comprises a spacer sleeve step part I and a spacer sleeve step part II, the spacer sleeve step part I is positioned at one side close to the outer sleeve, namely the outer side, and the spacer sleeve step part II is positioned at one side close to the mandrel, namely the inner side; the rubber is encapsulated to the step part II of the spacer sleeve, and the arc-shaped cover plate at the contact part with the step part is correspondingly arranged into a multi-stage step shape and comprises a cover plate step part I and a cover plate step part II; and an arc-shaped cover plate is covered on the step part in the assembling process, after the assembly, the first step part of the cover plate is connected with the first step part of the spacer bush in a metal interference fit mode, and the second step part of the cover plate is connected with the second step part of the spacer bush in an overpressure fit mode through rubber.
8. The multi-stage sealing method of claim 7, wherein: the first spacer sleeve step portion is provided with a glue groove, glue is coated in the glue groove before assembly, and when the first spacer sleeve step portion is connected with the first spacer sleeve step portion in a metal interference fit mode in the assembly process, the glue is also contacted with the first spacer sleeve step portion.
9. The multi-stage sealing method of claim 7, wherein: the sealing groove is formed in the first spacer sleeve step portion, the sealing ring is assembled in the sealing groove before assembly, and when the first cover plate step portion and the first spacer sleeve step portion are connected in a metal interference fit mode in the assembly process, the sealing ring is also pressed in the sealing groove by the first cover plate step portion.
10. The multi-stage sealing method of claim 7, wherein: the cover plate sealing groove is formed in the second step portion of the cover plate, when the rubber is encapsulated to the second step portion of the spacer sleeve, a sealing bulge is formed in the rubber, and when the second step portion of the cover plate is used for compressing the rubber on the second step portion of the spacer sleeve in the assembling process, the sealing bulge is located in the cover plate sealing groove and is in extrusion contact with the cover plate sealing groove.
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| CN202010830125.2A CN112112923B (en) | 2020-08-18 | 2020-08-18 | Multistage sealing method for cavity of liquid rubber composite node |
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| CN202010830125.2A CN112112923B (en) | 2020-08-18 | 2020-08-18 | Multistage sealing method for cavity of liquid rubber composite node |
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| CN115626191A (en) * | 2022-10-13 | 2023-01-20 | 株洲时代新材料科技股份有限公司 | Radial precompression liquid rubber composite node |
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