CN110940477A - Vibration table - Google Patents
Vibration table Download PDFInfo
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- CN110940477A CN110940477A CN201911393718.0A CN201911393718A CN110940477A CN 110940477 A CN110940477 A CN 110940477A CN 201911393718 A CN201911393718 A CN 201911393718A CN 110940477 A CN110940477 A CN 110940477A
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- air chamber
- pressure
- pressure bearing
- connector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/04—Monodirectional test stands
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- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention relates to a vibrating table, wherein a connector is formed on the vibrating table, the connector and a pressure bearing disc are mutually fixed together, the connector, the pressure bearing disc and a table body define at least one pressure bearing disc upper air chamber, and therefore the position of the connector relative to the table body can be adjusted by adjusting the air pressure in the pressure bearing disc upper air chamber. When the vibration table is used for carrying out a test experiment in a low-pressure environment, the condition that the moving coil is sucked into the low-pressure environment test box can not occur. The vibration table thus has a wider range of applications.
Description
Technical Field
The invention relates to the technical field of environmental simulation experiments, in particular to a vibration table.
Background
The purpose of the vibration test is to artificially simulate the vibration load which a test piece may be subjected to in the transportation, storage and use processes and the influence of the vibration load on the test piece in a laboratory, and to evaluate the environmental adaptability and reliability of the test piece.
Referring to fig. 1, a vibration table 10 generally includes a table body 11, an exciter assembly 12, an air spring 13, and a moving coil 14. The vibration table can meet the requirements of common vibration tests. But in addition to vibration testing alone, vibration tables are often fitted with environmental test chambers. The environmental test chamber is capable of providing an environment including conditions of temperature, humidity, low pressure, and the like. The conventional vibration table can meet the requirements of vibration tests under the environmental conditions of temperature and humidity, but cannot perform the tests under the condition of low air pressure. The fundamental reason is that the conventional vibrating table is of an open structure, the inner environment and the outer environment of the table body are communicated, and when the moving coil works in a low-pressure environment, the moving coil is sucked into a low-pressure environment box due to the pressure difference between the upper end and the lower end of the moving coil, so that the test cannot be completed.
A typical vibration table that can operate in a low pressure environment is shown in fig. 2. The vibration table 20 includes a table body 21, an exciting assembly 22, a moving coil 24, and a connector 25 connected to the moving coil 24. The connector 25 is used for various tests in connection with an environmental test chamber. The vibration table 20 is a water-cooling vibration test device with a totally-enclosed structure, and the whole table body part of the vibration table is used as an air chamber structure to balance the pressure above and below the moving coil. The vibrating table is high in price, complex in structure, high in maintenance difficulty and free of universality.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a vibration table in which a moving coil is not sucked into a low-pressure environment test chamber when the vibration table is used for a test experiment in a low-pressure environment.
The present invention provides a vibration table, comprising: the device comprises a table body, a guide structure and an excitation assembly which are arranged on the table body, a moving coil driven by the excitation assembly, an air spring connected with the moving coil and a connector fixed on the moving coil; the connector is used for being matched and connected with other original components, a pressure bearing disc is fixed on the connector, and the connector and the pressure bearing disc are in sliding sealing connection with the table body; the connector, the pressure bearing disc and the table body define at least one pressure bearing disc upper air chamber, and the position of the connector relative to the table body can be adjusted by controlling the air pressure in the air chamber.
In one embodiment, the table body is provided with a ventilation port communicated with the air chamber on the pressure bearing disc.
In one embodiment, the transfer ports include an intake port for intake air and an exhaust port for exhaust air.
In one embodiment, the connector, the pressure bearing disk and the table body further define at least one pressure bearing disk lower air chamber, and the pressure bearing disk upper air chamber and the pressure bearing disk lower air chamber are respectively arranged at the upper side and the lower side of the pressure bearing disk.
In one embodiment, a lower cylinder air chamber is formed on the table body, the lower cylinder air chamber is communicated with the external air pressure of the vibration table, and the lower cylinder air chamber is also communicated with the lower air chamber of the pressure bearing disc.
In one embodiment, the table body is provided with a lower cylinder air chamber, the lower cylinder air chamber is communicated with the external air pressure of the vibration table, and the lower cylinder air chamber is not communicated with the lower air chamber of the pressure bearing disc.
In one embodiment, the table body is provided with a ventilation port communicated with the air chamber below the pressure bearing disc.
In one embodiment, the air chamber on the pressure bearing disc comprises two air chambers which are isolated from each other.
In one embodiment, an environmental test chamber is connected to the connector.
In one embodiment, the pressure bearing disk and the connector are of an integrally formed structure.
The connector is formed on the vibration table, the connector and the pressure bearing disc are mutually fixed together, and the connector, the pressure bearing disc and the table body define at least one air chamber on the pressure bearing disc, so that the position of the connector relative to the table body can be adjusted by adjusting the air pressure in the air chamber on the pressure bearing disc. When the vibration table is used for carrying out a test experiment in a low-pressure environment, the condition that the moving coil is sucked into the low-pressure environment test box can not occur. The vibration table thus has a wider range of applications.
Drawings
FIG. 1 is a schematic diagram of a conventional vibration table;
FIG. 2 is a schematic view of another conventional vibrating table;
FIG. 3 is a schematic view of a vibration table according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 3, the embodiment provides a vibration table 100. The vibration table 100 includes: table body 110, guide structure and exciter assembly 120 provided on table body 110, moving coil 140 driven by exciter assembly 120, air spring 136 connected to moving coil 140, and connector 150 fixed to moving coil 136. The table body 110 includes an upper cylinder 112 and a lower cylinder 114. The upper cylinder 112 and the lower cylinder 114 are fixed to each other. The guide mechanism includes an upper guide mechanism 132 and a lower guide mechanism 134. An upper guide mechanism 132 and a lower guide mechanism 134 are provided in the lower cylinder 114, which cooperate to limit the range of motion of the moving coil 140. The lower guide 134 is connected at one end to the moving coil 140 and at the other end to the air spring 136. Exciter assembly 120 is also disposed within lower cylinder 114. Exciter assembly 120 is powered by the vibration of moving coil 140. The moving coil 140 is located partially within the lower cylinder 114 and partially within the upper cylinder 112. A connector 150 is fixed to the moving coil 140. The connector 150 is adapted to mate with other components, and in this embodiment is adapted to connect to an environmental test chamber to perform the desired vibration test. The environmental test chamber is not shown here.
In addition, a pressure bearing plate 152 is fixed to the connector 150. The pressure bearing disk 152 and the connector 150 are of an integrally formed structure. In other embodiments, the pressure bearing disk 152 and the connector 150 may be a split-type assembled structure. The connector 150 and the pressure bearing plate 152 are connected with the table body 110 in a sliding and sealing manner. The connector 150, pressure bearing disk 152 and table body 110 define at least one pressure bearing disk upper plenum 111, the position of the connector 150 relative to the table body 110 being adjustable by controlling the air pressure within the plenum. That is, both the connector 150 and the pressure bearing plate 152 may slide with respect to the upper cylinder 112, and the pressure to which the pressure bearing plate 152 is subjected can be adjusted by inputting or reducing gas to the pressure bearing plate upper air chamber 111 defined by the connector 150, the pressure bearing plate 152, and the table body 110, thereby adjusting the positions of the pressure bearing plate 152 and the connector 150.
The vibration table further includes an upper cover 118, and the upper cylinder 112 and the lower cylinder 114 are fixed together by the upper cover 118. Of course, in other embodiments, the upper cylinder 112 and the lower cylinder 114 may be connected together by other elements or other connection means, and of course, the upper cylinder 112 and the lower cylinder 114 may also be integrated together by one-piece molding. The upper cover 118 is also connected to a dust-proof film 116. The lower cylinder 114 has a lower cylinder plenum 115 therein.
As can be seen in fig. 3, the connector 150, pressure disc 152 and the table body 110 define a pressure disc upper plenum 111 and a pressure disc lower plenum 113. Gaps are formed between the connector 150, the pressure bearing disk 152 and the table body 110, and the gaps are filled in a flexible sealing manner to ensure the sealing performance of the pressure bearing disk upper air chamber 111 and the pressure bearing disk lower air chamber 113. The pressure-bearing disk upper air chamber 111 and the pressure-bearing disk lower air chamber 113 are respectively provided at the upper and lower sides of the pressure-bearing disk. The number of the pressure bearing disc upper air chamber 111 and the pressure bearing disc lower air chamber 113 is at least one, and the actual number can be adjusted according to actual needs. For example, the pressure disk upper plenum 111 may include two plenums spaced apart from each other.
The table body 110 has a lower cylinder chamber 115 formed therein, and the lower cylinder chamber 115 communicates with an external air pressure (i.e., atmospheric pressure or external ambient air pressure) of the vibration table 100. The lower cylinder plenum 115 is not in communication with the pressure bearing disk lower plenum 113. At this time, since the pressure-bearing disk upper air chamber 111 and the pressure-bearing disk lower air chamber 113 are isolated from each other and individually sealed, the relative position of the pressure-bearing disk 152 can be adjusted by adjusting the pressure difference between the pressure-bearing disk upper air chamber 111 and the pressure-bearing disk lower air chamber 113. Of course, in other embodiments, the lower cylinder chamber 115 may be configured to communicate with the lower pressure bearing plate chamber 113. The position of the pressure disk 152 can be adjusted by adjusting the pressure in the air chamber 111 on the pressure disk.
In this embodiment, the table body 110 of the vibration table 100 is provided with ventilation ports communicating with the pressure receiving plate upper air chamber 111 and the pressure receiving plate lower air chamber 113. These transfer ports include an intake port 111a for intake air and an exhaust port 111b for exhaust air. It is of course also possible to provide only one transfer opening each and to carry out the intake or exhaust simultaneously. The pressure-bearing disk lower air chamber 113 may be directly connected to the outside through an air inlet or an air outlet.
An environmental test chamber may be connected to connector 150 when an item requires a test. The object is placed in an environment test box, and the object is subjected to detection test by controlling the environmental conditions such as temperature, humidity and pressure. When a low-pressure test is needed, the inside of the environmental test chamber is low-pressure, and the outside of the vibration device is open (equivalent to the connection with atmospheric pressure); when the pressure bearing disc 152 does not vibrate, the moving coil 140 drives the connector 150 to move upwards due to the action of the negative pressure, so that in order to ensure that an object in the environmental test chamber in the low-pressure environment is located at a test position (i.e., a position where the pressure bearing disc is not at the low pressure), high-pressure gas needs to be introduced into a cavity above the pressure bearing disc 152 (i.e., the air chamber 111 on the pressure bearing disc) to counteract displacement generated due to the action of the negative pressure, so that the pressure bearing disc 152 returns to the position where the pressure bearing disc is; after the adjustment is completed, the vibration table 100 can be started to start the vibration test; when the vibration table 100 is opened, electricity is supplied to enable the excitation assembly 120 and the moving coil 140 to generate relative up-and-down movement, the moving coil 140 performs up-and-down movement under the guidance of the upper guide mechanism 132 and the lower guide mechanism 134, and the moving coil 140 simultaneously drives the connector 150 and the pressure-bearing disc 152 to vibrate.
The connector is formed on the vibration table and is mutually fixed with the pressure bearing disc, and the connector, the pressure bearing disc and the table body define at least one air chamber on the pressure bearing disc, so that the position of the connector relative to the table body can be adjusted by adjusting the air pressure in the air chamber on the pressure bearing disc. When the vibration table is used for carrying out a test experiment in a low-pressure environment, the condition that the moving coil is sucked into the low-pressure environment test box can not occur. The vibrating table is good in universality, can be installed quickly, and is low in maintenance cost, and meanwhile, compared with the conventional air-cooling and water-cooling vibrating table, the vibrating table is small in change, and has the capability of working in a low-pressure environment under the condition of small change, so that the vibrating table has a wider application range.
It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A vibration table, comprising: the device comprises a table body, a guide structure and an excitation assembly which are arranged on the table body, a moving coil driven by the excitation assembly, an air spring connected with the moving coil and a connector fixed on the moving coil; the connector is used for being matched and connected with other original components, a pressure bearing disc is fixed on the connector, and the connector and the pressure bearing disc are in sliding sealing connection with the table body; the connector, the pressure bearing disc and the table body define at least one pressure bearing disc upper air chamber, and the position of the connector relative to the table body can be adjusted by controlling the air pressure in the air chamber.
2. The vibration table of claim 1 wherein the table body is provided with ventilation ports communicating with the air chamber on the pressure bearing disk.
3. A vibration table according to claim 2, wherein the ventilation ports comprise an air inlet for air intake and an air outlet for air exhaust.
4. A vibration table according to claim 1, wherein said connector, said pressure bearing disk and said table body further define at least one pressure bearing disk lower air chamber, said pressure bearing disk upper air chamber and said pressure bearing disk lower air chamber being disposed on upper and lower sides of said pressure bearing disk.
5. A vibration table according to claim 4, wherein a lower cylinder air chamber is formed on the table body, the lower cylinder air chamber is communicated with the external air pressure of the vibration table, and the lower cylinder air chamber is also communicated with the lower air chamber of the pressure bearing disc.
6. A vibration table according to claim 4, wherein a lower cylinder air chamber is formed on the table body, the lower cylinder air chamber is communicated with the external air pressure of the vibration table, and the lower cylinder air chamber is not communicated with the lower air chamber of the pressure bearing disk.
7. A vibration table according to claim 6, wherein the table body is provided with a ventilation port communicating with the air chamber below the pressure bearing plate.
8. The vibration table according to any one of claims 1 to 7, wherein the air chamber on the pressure bearing disk comprises two air chambers isolated from each other.
9. Vibrating table according to any one of claims 1 to 7, characterised in that an environmental test chamber is connected to the connector.
10. Vibrating table according to any one of claims 1 to 7, characterized in that the pressure-bearing disc and the connector are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393718.0A CN110940477A (en) | 2019-12-30 | 2019-12-30 | Vibration table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393718.0A CN110940477A (en) | 2019-12-30 | 2019-12-30 | Vibration table |
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| Publication Number | Publication Date |
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| CN110940477A true CN110940477A (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911393718.0A Pending CN110940477A (en) | 2019-12-30 | 2019-12-30 | Vibration table |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751071A (en) * | 2020-08-13 | 2020-10-09 | 中国工程物理研究院总体工程研究所 | A moving coil position adjustment device |
| CN113670548A (en) * | 2021-09-03 | 2021-11-19 | 苏州韦博试验仪器有限公司 | Bearing device of long-stroke vibration test bed |
| CN114383797A (en) * | 2021-12-16 | 2022-04-22 | 北京航天希尔测试技术有限公司 | A temperature, humidity, high, vibration four comprehensive environmental sealing system |
| CN115389148A (en) * | 2022-10-27 | 2022-11-25 | 苏州东菱振动试验仪器有限公司 | Four-comprehensive vibration test system |
| WO2023035693A1 (en) * | 2021-09-08 | 2023-03-16 | 苏州苏试试验集团股份有限公司 | Fluid cooling-based vibrating table |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031160A (en) * | 1978-10-05 | 1980-04-16 | Derritron Electronics Ltd | Environmental testing apparatus |
| DE4320724A1 (en) * | 1993-06-23 | 1995-01-05 | Kloeckner Humboldt Deutz Ag | Vibrating apparatus for the production of mouldings by compaction |
| CN102353505A (en) * | 2011-06-08 | 2012-02-15 | 苏州东菱振动试验仪器有限公司 | Vibration test equipment pressure compensation method and apparatus thereof |
| CN105277329A (en) * | 2015-11-24 | 2016-01-27 | 苏州长菱测试技术有限公司 | Vibration testing system under low air pressure environment |
| CN211234892U (en) * | 2019-12-30 | 2020-08-11 | 苏州苏试试验集团股份有限公司 | Vibration table |
-
2019
- 2019-12-30 CN CN201911393718.0A patent/CN110940477A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031160A (en) * | 1978-10-05 | 1980-04-16 | Derritron Electronics Ltd | Environmental testing apparatus |
| DE4320724A1 (en) * | 1993-06-23 | 1995-01-05 | Kloeckner Humboldt Deutz Ag | Vibrating apparatus for the production of mouldings by compaction |
| CN102353505A (en) * | 2011-06-08 | 2012-02-15 | 苏州东菱振动试验仪器有限公司 | Vibration test equipment pressure compensation method and apparatus thereof |
| CN105277329A (en) * | 2015-11-24 | 2016-01-27 | 苏州长菱测试技术有限公司 | Vibration testing system under low air pressure environment |
| CN211234892U (en) * | 2019-12-30 | 2020-08-11 | 苏州苏试试验集团股份有限公司 | Vibration table |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751071A (en) * | 2020-08-13 | 2020-10-09 | 中国工程物理研究院总体工程研究所 | A moving coil position adjustment device |
| CN113670548A (en) * | 2021-09-03 | 2021-11-19 | 苏州韦博试验仪器有限公司 | Bearing device of long-stroke vibration test bed |
| WO2023035693A1 (en) * | 2021-09-08 | 2023-03-16 | 苏州苏试试验集团股份有限公司 | Fluid cooling-based vibrating table |
| CN114383797A (en) * | 2021-12-16 | 2022-04-22 | 北京航天希尔测试技术有限公司 | A temperature, humidity, high, vibration four comprehensive environmental sealing system |
| CN114383797B (en) * | 2021-12-16 | 2024-04-09 | 北京航天希尔测试技术有限公司 | Four comprehensive environment sealing systems of warm, wet, high and vibration |
| CN115389148A (en) * | 2022-10-27 | 2022-11-25 | 苏州东菱振动试验仪器有限公司 | Four-comprehensive vibration test system |
| CN115389148B (en) * | 2022-10-27 | 2023-02-10 | 苏州东菱振动试验仪器有限公司 | Four-comprehensive vibration test system |
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