CN112065909B - Dynamic stiffness characteristic adjusting method and liquid rubber composite node with auxiliary cavity - Google Patents
Dynamic stiffness characteristic adjusting method and liquid rubber composite node with auxiliary cavity Download PDFInfo
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- CN112065909B CN112065909B CN202010830656.1A CN202010830656A CN112065909B CN 112065909 B CN112065909 B CN 112065909B CN 202010830656 A CN202010830656 A CN 202010830656A CN 112065909 B CN112065909 B CN 112065909B
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- 239000007788 liquid Substances 0.000 title claims abstract description 137
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title abstract description 31
- 125000006850 spacer group Chemical group 0.000 claims description 159
- 238000007789 sealing Methods 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 24
- 238000013040 rubber vulcanization Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000003292 glue Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000013016 damping Methods 0.000 description 11
- 239000007787 solid Substances 0.000 description 9
- 238000004073 vulcanization Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
- F16F13/26—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 characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/264—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 characterised by adjusting or regulating devices responsive to exterior conditions comprising means for acting dynamically on the walls bounding a working chamber
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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
- F16F13/26—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 characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/28—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 characterised by adjusting or regulating devices responsive to exterior conditions specially adapted for units of the bushing type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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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
- F16F2230/00—Purpose; Design features
- F16F2230/30—Sealing arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
The invention discloses a dynamic stiffness characteristic adjusting method and a liquid rubber composite node with an auxiliary cavity. The invention can more easily realize the larger dynamic rigidity characteristic of the liquid rubber composite node.
Description
Technical Field
The invention relates to a dynamic stiffness characteristic adjusting method of a liquid rubber composite node and a product thereof, in particular to a dynamic stiffness characteristic adjusting method of a liquid rubber composite node and a liquid rubber composite node with an auxiliary cavity.
Background
According to the dynamic requirements, when the rotating arm node runs in a straight line at a high speed (high-frequency vibration), larger radial rigidity is provided to ensure the running 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 of 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 along the length direction of the flow channel grooves, and a plurality of liquid cavities are communicated through the node flow channel.
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, the liquid cavities are provided with liquid, 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 patent 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 on the outer side of 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.
The liquid rubber composite node in the patent document often needs larger static rigidity to realize larger dynamic rigidity characteristic, and the application realizes the larger dynamic rigidity characteristic of the product through another way.
In summary, how to design a method for adjusting the dynamic stiffness characteristic of a liquid rubber composite node and a liquid rubber composite node with an auxiliary cavity so that the liquid rubber composite node can more easily realize the larger dynamic stiffness characteristic of the liquid rubber composite node is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for adjusting the dynamic rigidity characteristic of a liquid rubber composite node and the liquid rubber composite node with an auxiliary cavity aiming at the defects in the prior art, and the method can more easily realize the larger dynamic rigidity characteristic of the liquid rubber composite node.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a dynamic rigidity characteristic adjusting method is characterized in that a liquid cavity is arranged on a liquid rubber composite node, an auxiliary cavity is additionally arranged, and the dynamic rigidity characteristic of the liquid rubber composite node is improved by utilizing the additionally arranged auxiliary cavity.
Preferably, the auxiliary cavities are provided in plurality, and the plurality of auxiliary cavities and the auxiliary cavities are independent of each other.
Preferably, a plurality of auxiliary cavities are arranged and communicated with each other.
The invention also discloses a liquid rubber composite node with an auxiliary cavity, which comprises an outer sleeve and a mandrel, wherein a middle spacer sleeve is arranged between the outer sleeve and the mandrel, the middle spacer sleeve and the mandrel are bonded together through rubber vulcanization, the middle spacer sleeve and the mandrel which are integrally vulcanized are assembled into the outer sleeve, a channel is also arranged in the liquid rubber composite node, a plurality of mandrel pits are arranged on the peripheral surface of the mandrel, and a plurality of convex blocks which radially extend towards the inside of the middle spacer sleeve are arranged on the middle spacer sleeve; after the liquid rubber composite node is assembled, each bump extends into one mandrel pit, and a liquid cavity is formed by enclosing each bump and rubber in the mandrel pit corresponding to the bump, so that a plurality of liquid cavities are formed in the liquid rubber composite node and are communicated through a channel; after the mandrel and the spacer sleeve are bonded together through rubber vulcanization, a plurality of auxiliary cavities are formed in the rubber between the mandrel and the spacer sleeve.
Preferably, the auxiliary cavity is located adjacent to one side of the outer sleeve and the liquid cavity is located adjacent to one side of the mandrel.
Preferably, two liquid cavities are arranged, and two auxiliary cavities are also arranged, wherein the two auxiliary cavities comprise an auxiliary cavity I and an auxiliary cavity II; liquid is filled in the first auxiliary cavity and the second auxiliary cavity, and the first auxiliary cavity and the second auxiliary cavity are independent or are communicated with each other through an auxiliary channel.
Preferably, the middle spacer bush comprises a spacer bush body and an arc-shaped cover plate arranged on the spacer bush body, a plurality of spaces are formed in the spacer bush body, and the spaces are in through hole shapes; covering an arc-shaped cover plate on the middle spacer sleeve at the outer side end of each space, and sealing the outer side end port of the space by using the arc-shaped cover plate, wherein the convex block is arranged on one side of the arc-shaped cover plate; after the assembly is completed, the convex block penetrates through the space on the spacer sleeve body and extends into the concave pit of the mandrel, and the convex block extending into the concave pit of the mandrel and the rubber positioned in the concave pit of the mandrel are enclosed to form a liquid cavity.
Preferably, after the mandrel and the middle spacer sleeve are bonded together through rubber vulcanization, the arc-shaped cover plate, the lug and the rubber are enclosed to form a plurality of auxiliary cavities.
Preferably, a step part is arranged on the middle spacer sleeve at the periphery of the opening at the outer end of the space, and the arc-shaped cover plate covers the step part; step portion on the spacer sleeve in the middle of will be established into multistage step portion, after spacer sleeve and arc apron assemble the overcoat together for adopt metal interference fit to connect and adopt rubber overpressure fit to connect between the arc apron and the step portion at other levels in the multistage step between one of them step portion in the multistage step.
Preferably, the step parts connected in the interference fit manner are outer step parts close to one side of the outer sleeve, the step parts connected in the interference fit manner are inner step parts close to one side of the mandrel, and the rubber is encapsulated on the inner step parts.
The invention has the beneficial effects that: in addition, the auxiliary cavity is additionally arranged, and the dynamic rigidity characteristic of the liquid rubber composite node is improved by utilizing the additionally arranged auxiliary cavity. The auxiliary cavities are independent and not communicated, and a larger dynamic rigidity characteristic can be realized. Through setting the step portion on with middle spacer sleeve to multistage step, after the assembly, utilize and adopt metal interference fit to connect between the one-level step portion in arc apron and the multistage step and utilize and adopt rubber over-pressure fit to connect between other multistage step portions in arc apron and the multistage step to avoided liquid rubber compound node after long-term the use, because lax of rubber, lead to the emergence that the over-pressure fit between metal and the rubber became invalid and lead to inside liquid leakage problem.
Drawings
FIG. 1 is a schematic sectional view of a node along the axial direction of a mandrel in embodiment 1 of the present invention;
FIG. 2 is an axial sectional view schematically showing the structure of a mandrel in example 1 of the present invention;
FIG. 3 is a schematic view showing a radial cross-sectional structure of an intermediate spacer and an arc-shaped cover plate in example 1 of the present invention;
FIG. 4 is a schematic radial sectional view of an arc-shaped cover plate in embodiment 1 of the present invention;
FIG. 5 is a schematic view of a partial cross-sectional view of FIG. 1 at a secondary liquid cavity;
FIG. 6 is an enlarged view of portion A of FIG. 1;
fig. 7 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 part of the middle spacer sleeve in embodiment 2 of the present invention;
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 3 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 portion of the middle spacer sleeve in embodiment 4 of the present invention;
fig. 10 is a schematic structural view, partially in section, of a node which is cut along the axial direction of the mandrel and is located at a step portion of the intermediate spacer in embodiment 5 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 6 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 intermediate spacer in embodiment 7 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 8 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 9 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 intermediate spacer in embodiment 10 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 bush in embodiment 11 of the present invention;
in the figure: 1. the sealing structure comprises an outer sleeve, 2 parts of a mandrel, 211 parts of a mandrel pit, 3 parts of a middle spacer sleeve, 311 parts of a bump, 312 parts of a spacer sleeve body, 313 parts of an arc-shaped cover plate, 3131 parts of a first cover plate step part, 3132 parts of a second cover plate step part, 3133 parts of a third cover plate step part, 4 parts of rubber, 411 parts of a sealing protrusion, 5 parts of a liquid cavity, 6 parts of a channel, 7 parts of a first auxiliary cavity, 8 parts of a second auxiliary cavity, 9 parts of a step part, 911 parts of a first spacer sleeve step part, 912 parts of a second spacer sleeve step part, 913 parts of a third spacer sleeve step part, 10 parts of rubber, 11 parts of a rubber groove, 12 parts of a sealing groove, 13 parts of a sealing ring and 14 parts of a cover plate sealing groove.
Detailed Description
The technical solution of the present invention is further elaborated below with reference to the accompanying drawings and specific embodiments.
Example 1: a method for adjusting the dynamic rigidity characteristic of a liquid rubber composite node is characterized in that besides a liquid cavity, an auxiliary cavity is additionally arranged on the liquid rubber composite node, and the dynamic rigidity characteristic of the liquid rubber composite node is improved by utilizing the additionally arranged auxiliary cavity.
The auxiliary cavities are arranged in a plurality of numbers, the auxiliary cavities are mutually independent and are not communicated, and the larger dynamic rigidity characteristic can be realized at the moment. Here, the plurality of auxiliary cavities may be communicated with each other through the auxiliary passage.
As shown in fig. 1 to 3, the liquid rubber composite node with the auxiliary cavity comprises an outer sleeve 1 and a mandrel 2, wherein a middle spacer 3 is arranged between the outer sleeve 1 and the mandrel 2, the middle spacer 3 and the mandrel 2 are vulcanized and bonded together through rubber 4, and the middle spacer 3 and the mandrel 2 which are vulcanized into a whole are assembled in the outer sleeve 1; the outer peripheral surface of the mandrel 2 is provided with a plurality of mandrel pits 211, the middle spacer sleeve 3 is provided with a plurality of lugs 311 which extend towards the inside of the middle spacer sleeve along the radial direction, after assembly, each lug 311 extends into one mandrel pit 211, and a liquid cavity 5 is formed by enclosing each lug 311 and the rubber 4 in the mandrel pit 211 corresponding to the lug 311, so that a plurality of liquid cavities 5 are formed in the liquid rubber composite node, and the liquid rubber composite node is also provided with a channel 6 which is communicated with the liquid cavities 5 through the channel 6; after the mandrel 2 and the middle spacer sleeve 3 are vulcanized and bonded together through the rubber 4, a plurality of auxiliary cavities are further formed in the rubber 4 between the mandrel 2 and the middle spacer sleeve 3, the positions of the auxiliary cavities are closer to the outer side than the positions of the liquid cavities, namely, the auxiliary cavities are closer to one side of the outer sleeve, and the dynamic rigidity characteristic of the liquid rubber composite node can be further improved through the formed auxiliary cavities.
In the present embodiment, two liquid cavities 5 are provided, and the channel 6 is a damping hole provided on the mandrel 2 and penetrating through the mandrel 2, and the two liquid cavities 5 are communicated through the damping hole. Two auxiliary cavities are also provided, including a first auxiliary cavity 7 and a second auxiliary cavity 8. Liquid is filled in the first auxiliary cavity 7 and the second auxiliary cavity 8. The first auxiliary cavity 7 and the second auxiliary cavity 8 are independent and not communicated, and a larger dynamic rigidity characteristic can be realized. Here, the first auxiliary cavity 7 and the second auxiliary cavity 8 may also be connected to each other through an auxiliary passage, which may be a damping hole penetrating the mandrel like a passage between the cavities communicating liquid, and the liquid in the auxiliary cavity may be poured and sealed through an opening (not shown in the drawings) formed in the surface of the outer sleeve.
As shown in fig. 3 and 4, the intermediate spacer 3 includes a spacer body 312 and an arc-shaped cover plate 313 provided on the spacer body 312, two spaces (such as spaces X1 and X2 in fig. 3) are dug out in advance on the spacer body 312, the space X1 and the space X2 are similar to through holes, and both the outer end and the inner end are open, where the side close to the mandrel 2 is regarded as the inner end and the end of the space far from the mandrel 2 is regarded as the outer end; at the outer end of the space, the arc cover plate 313 is covered on the middle spacer 3, the outer end port of the space is sealed by the arc cover plate 313, the projection 311 is arranged on one side of the arc cover plate 313, in the embodiment, the projection 311 and the arc cover plate 313 are of an integral structure, and after the space on the spacer body 312 is assembled, the projection 311 penetrates into the mandrel recess 211. The protrusion 311 does not contact the inner bottom of the mandrel recess 211 after extending into the mandrel recess 211, but leaves a gap, which is the liquid cavity 5. As shown in fig. 5, after the mandrel 2 and the middle spacer 3 are bonded together by vulcanization of the rubber 4, a plurality of auxiliary cavities are defined by the arc-shaped cover plate 313, the projection 311 and the rubber 4.
As shown in fig. 1 and 6, a step portion 9 is formed on the spacer body 312 around the opening of the outer end of the space, the step portion 9 is provided with a whole circle along the opening of the outer end of the space, the arc-shaped cover plate 313 covers the step portion 9, and one function of the step portion 9 is used as a positioning structure to facilitate positioning and assembling of the arc-shaped cover plate 313. 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, the step 9 provided on the intermediate spacer 3 is a two-step, and includes a spacer step portion one 911 and a spacer step portion one 912, where the spacer step portion one 911 is located at a side close to the jacket 1, i.e., an outer side, and the spacer step portion one 912 is located at a side of the mandrel, i.e., an inner side. The rubber 4 is encapsulated on the spacer step part 912, and the arc cover plate body 313 in contact with the step part is correspondingly arranged into a multi-step shape, which comprises a cover plate step part 3131 and a cover plate step part 3132. The step part 9 is covered with an arc-shaped cover plate 313 in the assembling process, after the assembling, the first cover plate step part 3131 is connected with the first spacer bush step part 911 in a metal interference fit mode, the second cover plate step part 3132 is connected with the first spacer bush step part 912 in an overpressure fit mode through rubber, and the rubber 4 is pressed on the first spacer bush step part 912 through the second cover plate step part 3132.
As shown in fig. 1, after the integrated intermediate spacer and mandrel are assembled into the outer sleeve 1, the end of the outer sleeve 1 where the intermediate spacer 3 contacts is chamfered, and then solid glue 10 is applied to further increase the sealing effect.
Example 2: as shown in fig. 7, the difference from embodiment 1 is that: set up gluey groove 11 on spacer step portion 911, before the assembly, scribble solid glue 10 in gluey groove 11, adopt the metal interference fit mode to connect between the assembly process apron step portion 3131 and spacer step portion 911, solid glue also contacts with apron step portion 3131, further increases sealed effect.
Example 3: as shown in fig. 8, the difference from embodiment 1 is that: the first spacer step part 911 is provided with a sealing groove 12, before assembly, a sealing ring 13 is assembled in the sealing groove 12, and in the assembly process, when the first cover plate step part 3131 is connected with the first spacer step part 911 in a metal interference fit mode, the sealing ring 13 is also pressed in the sealing groove 12 by the first cover plate step part 3131, 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 cover plate step portion first 3131, and glue is applied in the glue groove; a sealing groove is further formed in the first step 3131 of the cover plate, 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 (a schematic diagram is not given in the structure).
Example 4: as shown in fig. 9, the difference from embodiment 1 is that: and a cover plate sealing groove 14 is formed in the cover plate step portion two 3132, when the rubber is encapsulated on the spacer sleeve step portion one 912, a sealing protrusion 411 is formed on the rubber 4, and when the rubber 4 is pressed on the spacer sleeve step portion one 912 by the cover plate step portion two 3132 in the assembling process, the sealing protrusion 411 is located in the cover plate sealing groove 14 and is in pressing contact with the cover plate sealing groove 14.
Example 5: as shown in fig. 10, 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, a cover plate sealing groove 14 is formed on the cover plate step portion two 3132, when the rubber is encapsulated on the spacer step portion one 912, a sealing protrusion 411 is formed on the rubber 4, and when the rubber 4 is pressed against the spacer step portion one 912 by the cover plate step portion two 3132 in the assembling process, the sealing protrusion 411 is located in the cover plate sealing groove 14 and is pressed and contacted by the cover plate sealing groove 14. Set up gluey groove 11 on spacer step portion 911, before the assembly, scribble solid glue 10 in gluey groove 11, adopt the metal interference fit mode to connect between cover step portion 3131 and spacer step portion 911 in the assembly process, solid glue also contacts with cover step portion 3131, further increases sealed effect.
Example 6: as shown in fig. 11, the difference from embodiment 1 is that: in this embodiment, the sealing forms in embodiment 3 and embodiment 4 may be combined, so as to further enhance the sealing effect, that is, the cover plate sealing groove 14 is formed on the cover plate step two 3132, when the rubber is wrapped on the spacer step one 912, the sealing protrusion 411 is formed on the rubber 4, and when the rubber 4 is pressed on the spacer step one 912 by the cover plate step two 3132 in the assembling process, the sealing protrusion 411 is located in the cover plate sealing groove 14 and is pressed and contacted by the cover plate sealing groove 14. The first spacer step part 911 is provided with a sealing groove 12, before assembly, a sealing ring 13 is assembled in the sealing groove 12, and in the assembly process, when the first cover plate step part 3131 is connected with the first spacer step part 911 in a metal interference fit mode, the sealing ring 13 is also pressed in the sealing groove 12 by the first cover plate step part 3131, so that the sealing effect is further improved.
The arc-shaped cover plate 313 in the above-mentioned embodiment is provided in a multi-step, and here, the arc-shaped cover plate 313 may be provided only in a one-step, as shown in the following embodiments:
example 7: as shown in fig. 12, compared with embodiment 1, the difference is that: the arc-shaped cover plate 313 is only arranged into a one-stage step shape, the arc-shaped cover plate body 313 comprises a cover plate step portion I3131, the cover plate step portion I3131 is connected with the spacer sleeve step portion I911 in a metal interference fit mode, and the cover plate step portion I3131 is connected with the spacer sleeve step portion I912 in an overpressure fit mode through rubber and metal.
Example 8: as shown in fig. 13, the difference from example 7 is that: the first spacer step part 911 is provided with a sealing groove 12, before assembly, a sealing ring 13 is assembled in the sealing groove 12, and in the assembly process, when the first cover plate step part 3131 is connected with the first spacer step part 911 in a metal interference fit mode, the sealing ring 13 is also pressed in the sealing groove 12 by the first cover plate step part 3131, so that the sealing effect is further improved.
Example 9: as shown in fig. 14, the difference from example 7 is that: set up gluey groove 11 on spacer step portion 911, before the assembly, scribble solid glue 10 in gluey groove 11, adopt the metal interference fit mode to connect between the assembly process apron step portion 3131 and spacer step portion 911, solid glue also contacts with apron step portion 3131, further increases sealed effect.
The step part can be designed into 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. 15, the step 9 provided on the intermediate spacer 3 is a three-step having a spacer step one 911, a spacer step one 912 and a spacer step three 913, the spacer step one 911 being located on the side close to the outer jacket 1, i.e., the outer side, and the spacer step one 912 and the spacer step three 913 being located on the side close to the mandrel, i.e., the inner side. Rubber 4 is encapsulated on the spacer first step part 912 and the spacer third step part 913, the arc-shaped cover plate 313 in contact with the step parts is correspondingly arranged into a multi-stage step shape, and the arc-shaped cover plate body 313 comprises a cover plate step part I3131, a cover plate step part II 3132 and a cover plate step part III 3133. When the step part 9 is covered with the arc-shaped cover plate 313 in the assembling process, the first cover plate step part 3131 is connected with the first spacer bush step part 911 in a metal interference fit mode, and the second cover plate step part 3132 is connected with the first spacer bush step part 912 and the third cover plate step part 713 is connected with the third spacer bush step part 913 in an overpressure fit mode through rubber and metal.
Example 11: as shown in fig. 16, the difference from embodiment 10 is that: set up gluey groove 11 on spacer step portion 911, before the assembly, scribble solid glue 10 in gluey groove 11, adopt the metal interference fit mode to connect between cover step portion 3131 and spacer step portion 911 in the assembly process, solid glue also contacts with cover step portion 3131, 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 liquid rubber composite node is additionally provided with the auxiliary cavity, and the dynamic rigidity characteristic of the liquid rubber composite node is improved by utilizing the additionally arranged auxiliary cavity. The auxiliary cavities are independent from each other and are not communicated together, so that a larger dynamic rigidity characteristic can be realized. Set multistage step to through the step portion with on the intermediate spacer, after the assembly, utilize and adopt metal interference fit to connect between the one-level step portion in arc apron and the multistage step and utilize and adopt rubber over-pressure fit to connect between other multistage step portions in arc apron and the multistage step to avoided liquid rubber composite node after long-term the use, because lax of rubber, lead to the over-pressure fit between metal and the rubber to become invalid and lead to the emergence of inside liquid leakage problem.
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 (3)
1. The utility model provides a take compound node of liquid rubber of supplementary cavity, includes overcoat and dabber, and well spacer sleeve sets up between overcoat and dabber, and well spacer sleeve passes through rubber vulcanization with the dabber and bonds together, vulcanizes and forms integrative well spacer sleeve and dabber and assembles in the overcoat still be provided with passageway, its characterized in that in the compound node of liquid rubber: a plurality of mandrel concave pits are formed in the peripheral surface of the mandrel, and a plurality of convex blocks which extend towards the inside of the middle spacer sleeve along the radial direction are arranged on the middle spacer sleeve; after the liquid rubber composite node is assembled, each bump extends into one mandrel pit, and a liquid cavity is formed by enclosing each bump and rubber in the mandrel pit corresponding to the bump, so that a plurality of liquid cavities are formed in the liquid rubber composite node and are communicated through a channel; after the mandrel and the middle spacer sleeve are vulcanized and bonded together through rubber, a plurality of auxiliary cavities are also formed in the rubber between the mandrel and the middle spacer sleeve; the position of the auxiliary cavity is close to one side of the outer sleeve, the position of the liquid cavity is close to one side of the mandrel, and the liquid cavity and the auxiliary cavity are isolated from each other;
the middle spacer bush comprises a spacer bush body and an arc-shaped cover plate arranged on the spacer bush body, a plurality of spaces are formed in the spacer bush body, and the spaces are in a through hole shape; covering an arc-shaped cover plate on the middle spacer sleeve at the outer side end of each space, and sealing the outer side end port of the space by using the arc-shaped cover plate, wherein the convex block is arranged on one side of the arc-shaped cover plate; after the assembly is completed, the bump penetrates through the space on the spacer bush body and extends into the mandrel pit, and the bump extending into the mandrel pit and the rubber positioned in the mandrel pit enclose to form a liquid cavity;
a step part is arranged on the middle spacer sleeve at the periphery of the opening at the outer end of the space, and the arc-shaped cover plate covers the step part; step parts on the middle spacer sleeve are designed into multi-stage step parts, after the middle spacer sleeve and the arc-shaped cover plate are assembled into the outer sleeve together, the arc-shaped cover plate is connected with one step part of the multi-stage steps in a metal interference fit mode, and the arc-shaped cover plate is connected with other step parts of all stages of the multi-stage steps in a rubber overpressure fit mode;
the step part arranged on the middle spacer bush is a secondary step and comprises a spacer bush step part I and a spacer bush step part I; the arc-shaped cover plate in contact with the step part is correspondingly arranged into a two-stage step shape, and comprises a cover plate step part I and a cover plate step part II; after assembly, the first cover plate step part is connected with the first spacer sleeve step part in a metal interference fit mode, and the second cover plate step part is connected with the second spacer sleeve step part in an overpressure fit mode through rubber and metal; the one-level step part connected by metal interference fit is an outer side step close to one side of the outer sleeve, and the two-level step part connected by rubber overpressure fit is an inner side step close to one side of the mandrel.
2. The liquid rubber composite node with the auxiliary cavity according to claim 1, wherein: two liquid cavities are arranged, and two auxiliary cavities are also arranged, wherein the two auxiliary cavities comprise an auxiliary cavity I and an auxiliary cavity II; liquid is filled in the first auxiliary cavity and the second auxiliary cavity, and the first auxiliary cavity and the second auxiliary cavity are independent or are communicated with each other through an auxiliary channel.
3. The liquid rubber composite node with auxiliary cavity of claim 1, wherein: after the mandrel and the middle spacer sleeve are vulcanized and bonded together through rubber, a plurality of auxiliary cavities are formed by enclosing the arc-shaped cover plate, the convex block and the rubber.
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| CN113958660A (en) * | 2021-11-04 | 2022-01-21 | 株洲时代瑞唯减振装备有限公司 | Radial variable stiffness adjusting structure and method for integral liquid rubber composite node |
| CN113928361A (en) * | 2021-11-04 | 2022-01-14 | 株洲时代瑞唯减振装备有限公司 | Split type liquid rubber composite node with low diameter-to-axis ratio |
| WO2023077331A1 (en) * | 2021-11-04 | 2023-05-11 | 株洲时代瑞唯减振装备有限公司 | Liquid rubber composite node having small radial to axial stiffness ratio |
| CN114060450A (en) * | 2021-11-04 | 2022-02-18 | 株洲时代瑞唯减振装备有限公司 | Small-diameter-to-axis-ratio integral liquid rubber composite joint and rigidity adjusting method |
| CN113958659A (en) * | 2021-11-04 | 2022-01-21 | 株洲时代瑞唯减振装备有限公司 | Sealing structure and sealing method of liquid rubber composite node |
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