CN201765103U - Low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment - Google Patents
Low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment Download PDFInfo
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- CN201765103U CN201765103U CN2010205144406U CN201020514440U CN201765103U CN 201765103 U CN201765103 U CN 201765103U CN 2010205144406 U CN2010205144406 U CN 2010205144406U CN 201020514440 U CN201020514440 U CN 201020514440U CN 201765103 U CN201765103 U CN 201765103U
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Abstract
The utility model discloses a low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment. The exciter comprises a cylinder; and is characterized in that a heating device is disposed on the external surface of the cylinder. Because of the heating device disposed on the cylinder, the vibration exciter of the utility model can heat the cylinder automatically according to a preset temperature to keep the temperature consistency of the inner and outer wall of the cylinder in low temperature test environment, thereby, can eliminate the temperature gradient between the inner and outer surface of the cylinder, and prevent the phenomenon the piston is blocked because the fit gap between the piston and cylinder increases caused by the thermal strain generated by the temperature gradient. Therefore, the vibration exciter of the utility mode is substantially improved by environment adaptability, can work normally in low temperature test environment, and enlarges the application scope of pneumatic type shake table.
Description
Technical field
The utility model belongs to the excitation set of pneumatic type shaking table, is specifically related to a kind of low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment.
Background technology
Reliability Enhancement Test is a brand-new fail-test technology, it initiatively excites product bug and the exposing product weak link in designing by product being applied the artificial environmental stress that increases gradually, thereby reaches the purpose that design deficiency of product is found as early as possible and revised.The reliability intensifying test mainly contains following effect: can find the weak link with exposing product as early as possible, so that the latent defect in design phase elimination product, improve the product inherent reliability, reduce the total expenses of product in life-cycle processes such as production, screening, maintenance and guarantee greatly.This shows that the reliability intensifying test is the powerful measure that solves modern electronic product high reliability, low cost of development and lack contradiction between the lead time, thereby enjoy the common concern of domestic and international reliability engineering circle.
The pneumatic type shaking table is the novel reliability intensifying testing equipment of a class of external in recent years utility model, and its design considerations is the crash dynamics principle: a plurality of pneumatic hammer repeated stock table tops by being installed on shaking table bottom diverse location and then produce Triaxiality and six degrees of freedom random vibration test environment.Compare with traditional electromagnetic vibration generator system, it is that this broadband pseudorandom of superelevation is strengthened vibration environment that the advantage of pneumatic type shaking table is to provide a kind of amplitude probability density distribution, tired defect map to product reveals the very high effectiveness that excites, and makes the pneumatic type shaking table become the important testing equipment of a class in the reliability intensifying test.The pneumatic type vibrator is the critical component of pneumatic type shaking table, and primary structure comprises cylinder body and piston.Cylinder body is that outside surface is and has the cylindric of oblique section, and inside surface is the variable cross section hollow cylindrical, and it mainly acts on is to feed and discharge gases at high pressure, support piston and by changing the effect end face of air pressure to piston with cooperating of piston.The main effect of piston is: under the effect of gases at high pressure, realize to-and-fro movement, impact cushion block, produce the vibrational excitation signal.There is certain defective in design in existing pneumatic type vibrator, is mainly reflected in low temperature (as: 5 degrees centigrade) experimental enviroment, and vibrator can not starting of oscillation and operate as normal.This has limited the range of application of pneumatic type shaking table greatly.
The utility model content
The purpose of this utility model provides a kind of good environmental adaptability, can be at the low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment of low temperature operate as normal.
The technical scheme that its technical matters that solves the utility model adopts is: the low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment comprises cylinder body, is provided with heating arrangement at described outer surface of cylinder block.
Described heating arrangement is made of nexine heating, middle layer heat-barrier material and surface layer protective material.
Described nexine heating, middle layer heat-barrier material and surface layer protective material are respectively Electric radiant Heating Film, thermal isolation film and steel bushing.
Described outer surface of cylinder block is provided with ring groove, and heating arrangement is that ring bodies is embedded in the ring groove on the outer surface of cylinder block.
Find that by analysis and research the basic reason that the pneumatic type vibrator can't be worked is in specific low temperature environment: inner surface of cylinder block is consistent with the temperature of outer surface of piston, outer surface of cylinder block and environment temperature are approaching, during vibrator work, piston and cushion block bump and with the cylinder body frictional heat, and environment temperature is lower, this just makes the cylinder body surfaces externally and internally produce thermograde, consequent thermal strain changes greatly the tolerance clearance of piston and cylinder body, when the temperature difference acquired a certain degree, piston promptly was stuck.
The utility model is provided with heating arrangement at the problem that existing pneumatic type vibrator exists on cylinder body, when using with heating arrangement with after temperature control system is connected, can heat the temperature consistance that keeps the cylinder body inside and outside wall at the low-temperature test environment to adapt to cylinder body automatically according to design temperature, can eliminate the cylinder body surfaces externally and internally and produce thermograde, and consequent thermal strain makes the tolerance clearance of piston and cylinder body change greatly the phenomenon that causes piston promptly to be stuck.Therefore, the utility model can significantly improve environmental suitability, can be under the low-temperature test environment operate as normal, enlarged the range of application of pneumatic type shaking table.
Below in conjunction with drawings and Examples the utility model is further specified.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an application state synoptic diagram of the present utility model.
Specific embodiments
As shown in Figure 1, the low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment of the present utility model comprises cylinder body 1, on cylinder body 1 outside surface, be provided with ring groove 2, ring groove 2 is embedded with heating arrangement 7, and heating arrangement 7 is made of nexine heating 5, middle layer heat-barrier material 4 and surface layer protective material 3; What wherein heating 5, middle layer heat-barrier material 4 adopted Changsha three auspicious Sensotech Ltd. is not Electric radiant Heating Film, thermal isolation film, and surface layer protective material 3 is a steel bushing, and heating 5 is provided with connection lead 6.Heating also can adopt common resistive heater, cartridge heater, heating jacket or other similar heating element.
The effect of heating arrangement 7 is that when the vibrator temperature was lower than the operate as normal critical temperature, nexine heating 5 when temperature rises to a certain value, stopped heating to its heating, and the temperature of vibrator is remained in a certain scope; The effect of middle layer heat-barrier material 4 is the heat interchange that intercept heating equipment and external environment; The effect of surface layer protective material 3 is that nexine heating 5, middle layer heat-barrier material 4 are reinforced encapsulation, plays a protective role.
The situation of the utility model device as shown in Figure 2, on the inherent support spring 8 of chamber, be fixed with platen 9, platen 9 is provided with the acceleration transducer 10 that is connected with experimental facilities, the cylinder body 1 of two low temperature pneumatic type vibrators be fixed on platen 2 below, heating 5 is connected with temperature control system by connecting lead 6 in the heating arrangement 7 on the cylinder body 1, temperature sensor 11 in the temperature control system is arranged in the experimental enviroment, on cabinet wall or base.Temperature control mode: when environment temperature was reduced to a certain value, the temperature switch conducting was heated vibrator during the timer conducting.
The foundation of timer conducting or disconnection has 2 points: the one, the efficiency of heating surface, vibrator in low temperature environment from the time that critical temperature rises to a certain temperature value be the time of timer conducting; The 2nd, radiating efficiency, the time that the temperature of vibrator in specific low temperature environment reduced to critical temperature from a certain temperature value is the time that timer disconnects.These two the time numerical value all method of available experiment obtain.
The utility model device is used for the reliability intensifying test of low temperature environment.In low temperature environment, the tolerance clearance of piston and cylinder body can remain in the normal range.
Claims (4)
1. a low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment comprises cylinder body, it is characterized in that being provided with heating arrangement at described outer surface of cylinder block.
2. the low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment according to claim 1 is characterized in that described heating arrangement is made of nexine heating, middle layer heat-barrier material and surface layer protective material.
3. the low temperature pneumatic type vibrator that is used for the pneumatic type vibratory equipment according to claim 2 is characterized in that described nexine heating, middle layer heat-barrier material and surface layer protective material are respectively Electric radiant Heating Film, thermal isolation film and steel bushing.
4. according to claim 1 or the 2 or 3 described low temperature pneumatic type vibrators that are used for the pneumatic type vibratory equipment, it is characterized in that described outer surface of cylinder block is provided with ring groove, heating arrangement is that ring bodies is embedded in the ring groove on the outer surface of cylinder block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205144406U CN201765103U (en) | 2010-09-02 | 2010-09-02 | Low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205144406U CN201765103U (en) | 2010-09-02 | 2010-09-02 | Low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201765103U true CN201765103U (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205144406U Expired - Fee Related CN201765103U (en) | 2010-09-02 | 2010-09-02 | Low temperature pneumatic type vibration exciter used for pneumatic type vibration equipment |
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| CN (1) | CN201765103U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943629A (en) * | 2010-09-02 | 2011-01-12 | 中国人民解放军国防科学技术大学 | Low-temperature pneumatic vibration exciter for pneumatic vibration equipment |
| CN105758601A (en) * | 2016-02-29 | 2016-07-13 | 广西大学 | Vibration system for simulating complex excitation in sugarcane field |
| CN106984537A (en) * | 2017-05-09 | 2017-07-28 | 新乡市东振机械制造有限公司 | A kind of pre-heated vibrator |
| US20210131987A1 (en) * | 2019-11-01 | 2021-05-06 | Caterpillar Inc. | Grading a piston with deposits using thermal scan data |
-
2010
- 2010-09-02 CN CN2010205144406U patent/CN201765103U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943629A (en) * | 2010-09-02 | 2011-01-12 | 中国人民解放军国防科学技术大学 | Low-temperature pneumatic vibration exciter for pneumatic vibration equipment |
| CN105758601A (en) * | 2016-02-29 | 2016-07-13 | 广西大学 | Vibration system for simulating complex excitation in sugarcane field |
| CN105758601B (en) * | 2016-02-29 | 2018-10-23 | 广西大学 | Vibrational system for simulating sugarcane complex incentive |
| CN106984537A (en) * | 2017-05-09 | 2017-07-28 | 新乡市东振机械制造有限公司 | A kind of pre-heated vibrator |
| US20210131987A1 (en) * | 2019-11-01 | 2021-05-06 | Caterpillar Inc. | Grading a piston with deposits using thermal scan data |
| US11650173B2 (en) * | 2019-11-01 | 2023-05-16 | Caterpillar Inc. | Grading a piston with deposits using thermal scan data |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20150902 |
|
| EXPY | Termination of patent right or utility model |