CN117629659A - Hydraulic bushing experimental device and experimental method - Google Patents
Hydraulic bushing experimental device and experimental method Download PDFInfo
- Publication number
- CN117629659A CN117629659A CN202311691469.XA CN202311691469A CN117629659A CN 117629659 A CN117629659 A CN 117629659A CN 202311691469 A CN202311691469 A CN 202311691469A CN 117629659 A CN117629659 A CN 117629659A
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- hydraulic bushing
- ring
- hydraulic
- experiment
- guide sleeve
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- 238000002474 experimental method Methods 0.000 title claims abstract description 78
- 238000013016 damping Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 230000000670 limiting effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a hydraulic bushing experimental device, which comprises a base; the experiment ring is arranged at the top of the base; the guide sleeve is arranged at the top of the experiment ring and used for guiding the hydraulic bushing rubber piece, and the bottom of the inner diameter of the guide sleeve is provided with a precompression conical surface for precompression of the outer diameter of the hydraulic bushing rubber piece; the pressure head is arranged above the guide sleeve and is used for pressing the hydraulic bushing rubber part into the experiment ring from the guide sleeve; the experimental ring is provided with a pressure sensor for measuring the pressure of two hydraulic chambers of the hydraulic bushing rubber piece; the top of the base is provided with a second annular groove, and the experimental ring is placed in the second annular groove to prevent the experimental ring from sliding when the hydraulic bushing rubber part is pressed; the experimental ring top is provided with first annular groove, and the guide sleeve sets up in first annular groove. The invention can directly observe the opening condition of the pressure release valve and measure the pressure values in the two hydraulic chambers of the hydraulic bushing.
Description
Technical Field
The invention relates to the technical field of rubber metal vibration reduction parts of vehicle chassis, in particular to a hydraulic bushing experimental device and a hydraulic bushing experimental method.
Background
The hydraulic bushing can improve NVH and comfort of vehicle driving, and more vehicle types are applied in recent years. The chassis hydraulic bushing typically has two hydraulic chambers and a flow passage that communicates the two chambers. When the bushing receives exciting force, the cavity on one side is extruded, damping liquid stored in the cavity flows into the cavity on the other side through the flow channel, and the damping liquid flows in the flow channel, so that the hydraulic bushing can obtain high damping at a specific frequency. The hydraulic bushing is usually also designed with a relief valve structure that can act to relieve pressure when the chamber on one side is impacted and the internal pressure increases sharply. By reducing deformation of the hydraulic chamber due to excessive internal pressure, the durability life is improved. But the opening of the relief valve will affect both the damping angle and dynamic stiffness properties of the hydraulic bushing. Therefore, in the development process of the hydraulic bushing, the opening working condition of the relief valve needs to be researched, the pressure condition in the hydraulic chamber under different working conditions is determined, and the influence of the data on damping performance and durability is analyzed by using the data to guide the design of products. And the abnormal sound risk exists in the working process of the pressure relief valve, and the movement condition of the working process of the pressure relief valve is required to be analyzed to judge whether the abnormal sound risk exists. However, it is difficult to accurately analyze the opening condition of the pressure release valve and the internal pressure of the chambers at both sides of the bushing during operation through finite element analysis.
The opening and closing conditions of the pressure release valve of the hydraulic bushing during working cannot be directly observed by the existing experimental device. Therefore, the pressure relief valve opening condition can be directly observed, and the pressure of the chambers at two sides of the hydraulic bushing in working cannot be measured.
For this purpose we propose a hydraulic bushing experimental device and method.
Disclosure of Invention
The applicant provides a hydraulic bushing experimental device and an experimental method aiming at the defects in the prior art, so that the opening condition of a pressure release valve can be directly observed, and the pressure values in two hydraulic cavities of the hydraulic bushing can be measured.
The technical scheme adopted by the invention is as follows:
an experimental method of a hydraulic bushing, comprising the following steps:
step one, installing a pressure sensor into a through hole of an experiment ring;
step two, placing the experiment ring in a second annular groove of the base, placing the guide sleeve in a first annular groove of the experiment ring, and aligning a second straight line section of the guide sleeve with the first straight line section;
immersing the structure assembled in the second step into damping liquid, placing the hydraulic bushing rubber piece in a guide sleeve in a direction appointed by installation in the damping liquid, pressing the hydraulic bushing rubber piece into an experiment ring through a pressure head, and filling damping liquid into two hydraulic chambers of the hydraulic bushing rubber piece;
step four, taking out the experimental ring assembled in the step three, and wiping off superfluous damping fluid on the surface;
installing the experiment ring on the experiment machine table through a threaded hole of the experiment ring, completing connection of the wire harness of the pressure sensor, and enabling the side of the pressure release valve of the installed hydraulic bushing rubber part to face the outer side of the experiment machine table;
step six, starting the experiment machine, loading according to the set frequency and amplitude, wherein the frequency is from low frequency to high frequency, and the amplitude is from small amplitude to large amplitude; observing and recording the opening and closing conditions of the bushing pressure release valve through an experiment ring; the pressure changes in the two hydraulic chambers of the hydraulic bushing rubber can be analyzed by means of data recorded by the pressure sensor.
The invention also discloses a hydraulic bushing experimental device, which comprises:
a base;
the experiment ring is arranged at the top of the base;
the guide sleeve is arranged at the top of the experiment ring and used for guiding the hydraulic bushing rubber piece, and the precompression conical surface is arranged at the bottom of the inner diameter of the guide sleeve and used for precompression of the outer diameter of the hydraulic bushing rubber piece;
the pressure head is arranged above the guide sleeve and is used for pressing the hydraulic bushing rubber part into the experimental ring from the guide sleeve;
and the experimental ring is provided with a pressure sensor for measuring the pressure of two hydraulic chambers of the hydraulic bushing rubber piece.
It is further characterized by:
the base top is provided with the second annular groove, and experimental ring is placed in the second annular groove, prevents that experimental ring from sliding when pressure equipment hydraulic bushing rubber spare.
The experimental ring top is provided with first annular groove, and the guide sleeve sets up in first annular groove, and the guide sleeve slides when preventing pressure equipment hydraulic bushing rubber spare.
The experimental ring is made of transparent material.
And one side of the experiment ring is provided with a threaded hole, and the experiment ring is installed on the experiment machine table through the threaded hole.
And the experimental ring is also provided with two through holes, the two through holes are respectively aligned with the two hydraulic chambers of the hydraulic bushing rubber part, and the pressure sensor is arranged in the through holes.
The hydraulic bushing rubber piece comprises a vulcanizing body and a channel, the hydraulic bushing rubber piece is divided into two hydraulic chambers by the vulcanizing body, and the two hydraulic chambers are connected by the channel.
And the inner hole of the experimental ring is in interference fit with the outer diameter of the hydraulic bushing rubber part.
The first annular groove is provided with a first straight line segment, and the outer diameter of the guide sleeve is provided with a second straight line segment corresponding to the first straight line segment of the first annular groove for determining the installation position of the hydraulic bushing rubber piece.
The beneficial effects of the invention are as follows:
the invention has compact and reasonable structure and convenient operation, the experimental ring is made of transparent materials, the diameter of the inner hole of the experimental ring is in interference fit with the outer diameter of the rubber part of the hydraulic bushing, the opening condition of the pressure release valve can be directly observed through the experimental ring, and the pressure values in the two hydraulic chambers of the hydraulic bushing can be measured.
Meanwhile, the invention has the following advantages:
(1) The base is used for supporting the experiment ring, and the base top is provided with the second annular groove, and the experiment ring is placed in the second annular groove, plays spacing effect to the experiment ring, prevents that the experiment ring from appearing sliding when the pressure equipment.
(2) The diameter of the inner hole of the base is smaller than the diameter of the end face of the hydraulic bushing rubber piece, and when in press fitting, the hydraulic bushing rubber piece is in contact with the top surface of the base, so that the press fitting limiting effect is achieved.
(3) The experimental ring top is provided with first annular groove, and first annular groove is provided with first straight line section. The guide sleeve is arranged in the first annular groove, so that the guide sleeve is limited, and the guide sleeve is prevented from shaking during rotation; the outer diameter of the guide sleeve is provided with a second straight line section corresponding to the first straight line section of the first annular groove, and the second straight line section is used for determining the installation position of the hydraulic bushing rubber piece.
(4) The interference fit is adopted between the inner diameter of the experimental ring and the outer diameter of the hydraulic bushing rubber piece, the outer sleeve structure of the hydraulic bushing rubber piece is canceled in the experimental device, the experimental ring has the effect of the outer sleeve, and the problem that the metal outer sleeve cannot be observed due to the opacity is avoided.
(5) The internal diameter of the guide sleeve is close to one end of the experiment ring, and the part with gradually reduced internal diameter is arranged at the end face to reach the minimum value, so that the necking effect on the external diameter of the rubber main spring can be realized in the press fitting process, the external diameter of the hydraulic bushing rubber part is elastically deformed to be smaller, the hydraulic bushing rubber part can be more easily pressed into the internal diameter of the experiment ring, the rubber part outside the hydraulic bushing rubber part can be protected, and the hydraulic bushing rubber part is not cut and damaged by the experiment ring in the press fitting process because of interference with the internal diameter of the experiment ring.
(6) When the hydraulic bushing rubber part is pressed, the hydraulic bushing rubber part is completely pressed under damping liquid, so that damping liquid is filled in two hydraulic chambers of the pressed hydraulic bushing rubber part.
Drawings
Fig. 1 is a schematic view of the hydraulic bushing rubber of the present invention assembled to an experimental ring.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic view of section A-A of fig. 2.
FIG. 4 is a schematic diagram of an experimental loop of the present invention.
FIG. 5 is a schematic view of section B-B of FIG. 4.
Fig. 6 is a schematic view of section C-C of fig. 5.
Fig. 7 is a schematic view of the press-fitting of the hydraulic bushing rubber member of the present invention.
Fig. 8 is a cross-sectional view of a base of the present invention.
Wherein: 1. an experiment ring; 101. a threaded hole; 102. a through hole; 103. a first annular groove; 1031. a first straight line segment; 2. a hydraulic bushing rubber member; 201. a vulcanized body; 202. a channel; 3. a pressure sensor; 4. a base; 401. a second annular groove; 5. a guide sleeve; 6. a pressure head; 7. the experiment machine.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 8, a hydraulic bushing experimental device is provided, wherein an experimental ring 1, a hydraulic bushing rubber member 2, a pressure sensor 3 and an experimental bench 7 are provided, the hydraulic bushing rubber member 2 is arranged in the experimental ring 1, the pressure sensor 3 is arranged on the experimental ring 1, and the experimental ring 1 is arranged on the experimental bench 7 for experiment.
The experiment ring 1 is made of transparent materials, interference fit is adopted between the inner diameter of the experiment ring 1 and the outer diameter of the hydraulic bushing rubber part 2, a threaded hole 101 is formed in one side of the experiment ring 1, and the experiment ring 1 is installed on the experiment machine table 7 through the threaded hole 101. The experimental ring 1 is also provided with two through holes 102, the two through holes 102 are respectively aligned with the two hydraulic chambers of the hydraulic bushing rubber part 2, the pressure sensor 3 is arranged in the through holes 102, and the pressure changes in the two hydraulic chambers are respectively measured through the two pressure sensors 3.
The hydraulic bushing rubber 2 is press-fitted in the experimental ring 1, and the hydraulic bushing rubber 2 includes a vulcanization body 201 and a passage 202. The hydraulic bushing rubber 2 is divided into two hydraulic chambers by a vulcanizing body 201, and the two hydraulic chambers are connected by a passage 202. Damping fluid is arranged in each of the two hydraulic chambers, when one hydraulic chamber receives pressure, the damping fluid in the hydraulic chamber flows to the other hydraulic chamber through the channel 202, and the damping fluid dissipates energy through the channel 202, so that high damping is obtained.
The base 4 is used for supporting the experiment ring 1, the second annular groove 401 is formed in the top of the base 4, the experiment ring 1 is placed in the second annular groove 401, the limiting effect on the experiment ring 1 is achieved, and the experiment ring 1 is prevented from sliding during press fitting; the diameter of the inner hole of the base 4 is smaller than the diameter of the end face of the hydraulic bushing rubber part 2, and when in press fitting, the hydraulic bushing rubber part 2 is in contact with the top surface of the base 4, so that the press fitting limiting effect is achieved. The top of the experimental ring 1 is provided with a first annular groove 103, and the first annular groove 103 is provided with a first straight line segment 1031. The guide sleeve 5 is arranged in the first annular groove 103, plays a limiting role on the guide sleeve 5, and prevents the guide sleeve 5 from shaking when rotating; the guide sleeve 5 is provided with a second straight line segment on the outer diameter corresponding to the first straight line segment 1031 of the first annular groove 103 for determining the installation position of the hydraulic bushing rubber member 2. The inner hole diameter of the guide sleeve 5 is slightly larger than the outer diameter of the hydraulic bushing rubber 2, and the hydraulic bushing rubber 2 can axially slide in the guide sleeve 5. The hydraulic bushing rubber 2 is pressed into the experimental ring 1 by the ram 6. The outer diameter of the lower end of the pressure head 6 is slightly smaller than the diameter of the inner hole of the guide sleeve 5.
The guide sleeve 5 has an inner diameter bottom provided with a precompression conical surface near one end of the experiment ring 1 for precompression of the outer diameter of the hydraulic bushing rubber 2 before the hydraulic bushing rubber 2 is put into the experiment ring 1 so that the hydraulic bushing rubber 2 is smoothly pressed into the experiment ring 1, and the situation that the experiment ring 1 cuts the hydraulic bushing rubber 2 due to interference between the inner diameter of the experiment ring 1 and the outer diameter of the hydraulic bushing rubber 2 can be avoided.
The experimental ring 1 with the hydraulic bushing rubber part 2 is arranged on an experimental machine 7, the experimental machine 7 is started, loading is carried out according to set frequency and amplitude, the frequency is from low frequency to high frequency, and the amplitude is from small amplitude to large amplitude; the opening and closing conditions of the bushing pressure release valve are observed and recorded through the experiment ring 1; the working condition of the pressure release valve can be recorded through video acquisition equipment, and the recorded video can be analyzed in detail in the later period; the pressure changes in the two hydraulic chambers of the hydraulic bushing rubber 2 can then be analyzed by means of the data recorded by the pressure sensor 3.
The hydraulic bushing experimental method comprises the following steps:
step one, mounting a pressure sensor 3 into a through hole 102 of an experiment ring 1;
step two, placing the experiment ring 1 in the second annular groove 401 of the base 4, placing the guide sleeve 5 in the first annular groove 103 of the experiment ring 1, and aligning the second straight line segment of the guide sleeve 5 with the first straight line segment 1031;
immersing the structure assembled in the second step into damping liquid, placing the hydraulic bushing rubber part 2 in a guide sleeve 5 in a mounting appointed direction in the damping liquid, pressing the hydraulic bushing rubber part 2 into the experiment ring 1 through a pressure head 6, and filling damping liquid into two hydraulic chambers of the hydraulic bushing rubber part 2;
step four, taking out the experimental ring 1 assembled in the step three, and wiping off superfluous damping fluid on the surface;
step five, mounting the experiment ring 1 on the experiment machine 7 through the threaded hole 101 of the experiment ring 1, completing the connection of the wire harness of the pressure sensor 3, and enabling the side of the pressure release valve of the hydraulic bushing rubber part 2 to face the outer side of the experiment machine 7 after mounting;
step six, starting the experiment machine 7, loading according to the set frequency and amplitude, wherein the frequency is from low frequency to high frequency, and the amplitude is from small amplitude to large amplitude; the opening and closing conditions of the bushing pressure release valve are observed and recorded through the experiment ring 1; the pressure changes in the two hydraulic chambers of the hydraulic bushing rubber 2 can then be analyzed by means of the data recorded by the pressure sensor 3.
The above description is intended to illustrate the invention and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the invention.
Claims (10)
1. An experimental method of a hydraulic bushing is characterized by comprising the following steps:
step one, installing a pressure sensor (3) into a through hole (102) of an experiment ring (1);
step two, placing the experiment ring (1) in a second annular groove (401) of the base (4), placing the guide sleeve (5) in a first annular groove (103) of the experiment ring (1), and aligning a second straight line section of the guide sleeve (5) with the first straight line section (1031);
immersing the structure assembled in the second step into damping liquid, placing the hydraulic bushing rubber part (2) in a guide sleeve (5) in a mounting appointed direction in the damping liquid, pressing the hydraulic bushing rubber part (2) into the experiment ring (1) through a pressing head (6), and filling damping liquid into two hydraulic cavities of the hydraulic bushing rubber part (2);
step four, taking out the experimental ring (1) assembled in the step three, and wiping off superfluous damping fluid on the surface;
step five, installing the experiment ring (1) on the experiment machine table (7) through a threaded hole (101) of the experiment ring (1), completing the connection of the wire harness of the pressure sensor (3), and enabling one side of the pressure release valve of the installed hydraulic bushing rubber part (2) to face the outer side of the experiment machine table (7);
step six, starting the experiment machine (7), loading according to the set frequency and amplitude, wherein the frequency is from low frequency to high frequency, and the amplitude is from small amplitude to large amplitude; the opening and closing conditions of the bushing pressure release valve are observed and recorded through the experiment ring (1); the pressure changes in the two hydraulic chambers of the hydraulic bushing rubber (2) can be analyzed by means of data recorded by the pressure sensor (3).
2. A hydraulic bushing testing device, comprising:
a base (4);
the experiment ring (1) is arranged at the top of the base (4);
the guide sleeve (5) is arranged at the top of the experiment ring (1) and used for guiding the hydraulic bushing rubber piece (2), and the precompression conical surface is arranged at the bottom of the inner diameter of the guide sleeve (5) and used for precompression of the outer diameter of the hydraulic bushing rubber piece (2);
the pressure head (6) is arranged above the guide sleeve (5) and is used for pressing the hydraulic bushing rubber part (2) into the experiment ring (1) from the guide sleeve (5);
the experimental ring (1) is provided with a pressure sensor (3) for measuring the pressure of two hydraulic chambers of the hydraulic bushing rubber part (2).
3. A hydraulic bushing testing device according to claim 2, wherein: the top of the base (4) is provided with a second annular groove (401), and the experimental ring (1) is placed in the second annular groove (401) to prevent the experimental ring (1) from sliding when the hydraulic bushing rubber part (2) is pressed.
4. A hydraulic bushing testing device according to claim 3, wherein: the experimental ring (1) top is provided with first annular groove (103), and guide sleeve (5) set up in first annular groove (103), guide sleeve (5) slip when preventing pressure equipment hydraulic bushing rubber spare (2).
5. A hydraulic bushing testing device according to claim 2, wherein: the experimental ring (1) is made of transparent material.
6. A hydraulic bushing testing device according to claim 5, wherein: one side of the experiment ring (1) is provided with a threaded hole (101), and the experiment ring (1) is installed on the experiment machine table 7 through the threaded hole (101).
7. A hydraulic bushing testing device according to claim 6, wherein: the experimental ring (1) is further provided with two through holes (102), the two through holes (102) are respectively aligned with two hydraulic chambers of the hydraulic bushing rubber piece (2), and the pressure sensor (3) is installed in the through holes (102).
8. A hydraulic bushing testing device according to claim 7, wherein: the hydraulic bushing rubber piece (2) comprises a vulcanizing body (201) and a channel (202), the hydraulic bushing rubber piece (2) is divided into two hydraulic chambers by the vulcanizing body (201), and the two hydraulic chambers are connected by the channel (202).
9. A hydraulic bushing testing device according to claim 2, wherein: the inner hole of the experiment ring (1) is in interference fit with the outer diameter of the hydraulic bushing rubber part (2).
10. A hydraulic bushing testing device according to claim 4, wherein: the first annular groove (103) is provided with a first straight line section (1031), and the outer diameter of the guide sleeve (5) is provided with a second straight line section corresponding to the first straight line section (1031) of the first annular groove (103) for determining the installation position of the hydraulic bushing rubber part (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311691469.XA CN117629659A (en) | 2023-12-08 | 2023-12-08 | Hydraulic bushing experimental device and experimental method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311691469.XA CN117629659A (en) | 2023-12-08 | 2023-12-08 | Hydraulic bushing experimental device and experimental method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117629659A true CN117629659A (en) | 2024-03-01 |
Family
ID=90035568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311691469.XA Pending CN117629659A (en) | 2023-12-08 | 2023-12-08 | Hydraulic bushing experimental device and experimental method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117629659A (en) |
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2023
- 2023-12-08 CN CN202311691469.XA patent/CN117629659A/en active Pending
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