CN112044481A - High-low temperature damp-heat test box - Google Patents
High-low temperature damp-heat test box Download PDFInfo
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- CN112044481A CN112044481A CN202010951502.8A CN202010951502A CN112044481A CN 112044481 A CN112044481 A CN 112044481A CN 202010951502 A CN202010951502 A CN 202010951502A CN 112044481 A CN112044481 A CN 112044481A
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- low temperature
- coupler
- push plate
- fan
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A high-low temperature damp-heat test box is used for solving the problems that a circulating fan is unstable in rotation and the service life of parts is shortened due to unstable connection between a coupler and a fan shaft caused by extreme change of temperature; the technical scheme for solving the technical problem comprises a box body, a circulating fan and a coupler; the end face of the shaft coupling connected with the fan shaft is provided with a plurality of conical pins, the end face of the fan shaft connected with the shaft coupling is provided with pin holes matched with the conical pins, the conical pins are inserted into the corresponding pin holes, the outer part of the shaft coupling is provided with a push plate capable of sliding back and forth, the front side of the push plate is provided with a sealing cavity, a sliding piston is arranged in the sealing cavity, the side wall of the sealing cavity is provided with a gas channel, and a gas channel is arranged in the sealing heat conducting head; the invention can well improve the rotation stability of the whole part in the using process and prolong the service life of each part.
Description
Technical Field
The invention relates to the technical field of test boxes, in particular to a high-low temperature damp-heat test box.
Background
The high and low temperature tests are short for high temperature tests and low temperature tests, and the purpose of the tests is to evaluate the influence of high and low temperature conditions on the performance of the equipment during storage and work. In the design and manufacture of some important parts or finished products, in order to solve the working performance of the products under extreme environments, high-temperature to low-temperature tests are generally performed on the products to check the reliability of the products working under the extreme environments.
In order to ensure the temperature uniformity of the test chamber, a circulation fan is an essential important component. Because the temperature change of the test box is usually large and can be between-100 ℃ and +200 ℃, the mechanical structure of the fan is also tested by the large temperature change, particularly, the moving part with a matching relation, such as the matching of a shaft, a bearing seat, a bearing, a coupler and a fan shaft in a circulating fan structure, and the like, in the working process of the high-low temperature test box, because the fan shaft is positioned in a temperature change area, hot air or cold air in the test box directly transfers heat to the fan shaft, and under the condition of large temperature change, the fan shaft can also generate large change due to thermal expansion and cold contraction, and when the driving motor drives the fan shaft, the driving motor is connected and driven through the coupler, the coupler and the fan shaft are not of an integrated structure and are far away from a temperature change area relative to the fan shaft, the deformation generated after the heat conduction can be ignored, consequently only need mainly consider the deformation of fan axle in the actual work process can, when the fan axle takes place deformation, the shaft coupling probably changes with being connected of fan axle this moment, and the clearance is too big or form the interference, and these all can produce great influence to the life of shaft coupling and fan axle, consequently need the temperature of proof box inside more to adjust, reach best connection effect, improve the life of each part.
Therefore, the problems that when the fan of the high-low temperature test box changes from extremely low temperature to extremely high temperature, the fan shaft and the coupling have different expansion deformation amounts, so that the fan is unstable in operation and short in service life are solved, and technical research personnel are troubled all the time.
Disclosure of Invention
The invention aims to provide a high-low temperature damp-heat test box, which aims to solve the problems that in the prior art, due to extreme temperature change in the high-low temperature test box, the connection between a coupler and a fan shaft is unstable, the rotation of a circulating fan is unstable, and the service life of parts is shortened.
The invention provides a high-low temperature damp-heat test box, which comprises a box body, wherein a vertically arranged partition plate is arranged in the box body, the partition plate divides the box body into a test area and a connection area, the partition plate is connected with a circulating fan which is transversely arranged in the front and back direction, the circulating fan comprises a fan blade part and a fan shaft part, the fan blade part is positioned in the test area, the fan shaft part is positioned in the connection area, the rear side wall of the connection area is provided with a driving device, the driving device is connected with the fan shaft through a coupler, the end surface of the coupler connected with the fan shaft is provided with a plurality of conical pins, the end surface of the fan shaft connected with the coupler is provided with pin holes matched with the conical pins, the conical pins are inserted into the corresponding pin holes, the outer part of the coupler is provided with a push plate capable of sliding in the front and back direction, and a spring is connected between the, the push pedal can drive the shaft coupling and slide around, the front end of push pedal be equipped with the piston rod of a plurality of circumference equipartitions, the front side of push pedal be equipped with a plurality of and the piston rod one-to-one seal chamber, the front end of piston rod be connected with arrange the sliding piston in the seal chamber in, be equipped with gas passage on seal chamber's the lateral wall, gas passage's connector be located sliding piston's upper portion, gas passage's the other end lead to baffle one end, gas passage arrange the inside of baffle one end in and be equipped with sealed heat conduction head.
According to the invention, through designing the connecting structure capable of relatively sliding the coupling and the driving shaft, and the connection and matching of the conical pin and the pin hole between the fan shaft and the coupling, and simultaneously combining the action of the gas channel, the sealing cavity, the sliding piston and the push plate to drive the coupling to slide back and forth, the adjustment through the matching of the conical pin and the pin hole is realized, the connection adjustment of the coupling and the fan shaft is further controlled, the adaptive adjustment caused by thermal expansion and cold contraction due to temperature change is realized, the rotation stability of the whole part in the using process can be well improved, and the service life of each part is prolonged.
Preferably, the coupler is of a cylindrical structure with one end open and the other end closed, one end of the coupler opening is sleeved on a driving shaft of the driving device, a sliding groove is formed in the inner side wall of the coupler, a flat key is arranged on the driving shaft, and the flat key is slidably mounted in the sliding groove.
Preferably, the diameter of the front end of the taper pin is smaller than that of the rear end, and the taper of the taper pin is 1: 10-1:20.
Preferably, the outer fringe of shaft coupling on be equipped with annular boss, push pedal and annular boss between be connected for rotating, and push pedal and the laminating of annular boss arrange, push pedal accessible annular boss promote the shaft coupling and slide around.
Preferably, the outer side of the gas channel is wrapped with a heat insulation layer, and the heat insulation layer covers the whole gas channel from the end of the partition plate to the inside of the sealed cavity.
Preferably, one or more of nitrogen, helium and argon are introduced into the gas channel.
Preferably, the connection matching part of the fan shaft and the partition plate is provided with a bearing, and a bearing pressing plate for fixing the bearing is arranged in the connection area.
Preferably, the sealing heat conduction heads are uniformly distributed on the periphery of the fan blade part, and the cross-sectional area of the sealing heat conduction heads is 2-4 times of the diameter of the gas channel pipeline.
Preferably, the connecting area is internally provided with a fixed seat which plays a role in fixing and guiding the fan shaft, and the inner wall of the fixed seat is provided with an elastic layer wrapped on the outer edge of the fan shaft.
In summary, the technical scheme of the invention at least has the following beneficial effects:
1. the stability of rotation of the fan shaft and the coupling in the working process is improved, and the service life is prolonged;
2. the sliding coupler and the conical pin are designed, so that the accuracy in the adjusting process can be improved;
3. the thermal expansion and cold contraction of the gas are used as power, the problem caused by the change source is sensed and finally controlled from the change of the change source, and the corresponding adjustment is more accurate and better;
4. the structure is simple, and the device can be realized without adding a plurality of accessories.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a top sectional view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 in accordance with the present invention;
fig. 4 is a schematic view of the connection position of the coupling and the fan shaft according to the present invention.
FIG. 5 is a schematic front view of the push plate of the present invention.
Fig. 6 is a front sectional view of the coupling and drive shaft engaging portion of the present invention.
FIG. 7 is a top view of the distribution of the thermal barrier layer at the gas passage portion of the present invention.
Fig. 8 is a schematic view of an envelope gas channel of the thermal barrier layer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the attached drawings 1-8, the invention provides a high-low temperature damp-heat test box, which comprises a box body 1, wherein a vertically-arranged partition plate 2 is arranged in the box body 1, the box body 1 is divided into a test area and a connection area by the partition plate 2, the partition plate 2 is connected with a circulating fan which is transversely arranged in the front and at the back and is used for circulating air in the test box to achieve a more uniform temperature effect, the circulating fan comprises a fan blade part 3 and a fan shaft part 4, the fan blade part 3 is arranged in the test area, the fan shaft part 4 is arranged in the connection area, the back side wall of the connection area is provided with a driving device, the driving device is connected with a fan shaft through a coupler 14, the end surface of the coupler 14 connected with the fan shaft is provided with a plurality of tapered pins 5, the end surface of the fan shaft connected with the coupler 14 is provided with pin holes 6 matched with the tapered pins 5, the taper pins 5 are inserted into the corresponding pin holes 6, the coupling 14 can slide back and forth to achieve different diameters inserted into the pin holes 6 through the cooperation of the taper pins 5 and the pin holes 6, and further different connection effects are achieved; when the temperature of the test area rises, the push plate 7 can push the coupler 14 to move towards the front side under the action of gas pressure, so that the diameter of the conical pin 5 inserted into the pin hole 6 is expressed, in addition, the push plate 7 capable of sliding back and forth is arranged outside the coupler 14, a spring 8 is connected between the push plate 7 and the test area, the spring 8 can push the push plate 7 to drive the coupler 14 to move towards the front side, the push plate 7 can drive the coupler 14 to slide back and forth, a plurality of piston rods uniformly distributed on the circumference are arranged at the front end of the push plate 7, a plurality of sealing cavities 9 corresponding to the piston rods one to one are arranged at the front side of the push plate 7, the front ends of the piston rods are connected with sliding pistons 11 arranged in the sealing cavities 9, a gas channel 10 is arranged on the side wall of the sealing cavities 9, a connecting port of the gas channel 10 is positioned at the upper part of the sliding pistons 11, the gas channel 10 is arranged in one end of the clapboard 2 and is internally provided with a sealing heat conduction head 12; the cross-sectional area of the heat conduction joint is larger, so that the temperature change in the test area can be better sensed.
According to the invention, by designing a connecting structure capable of relatively sliding the coupling 14 and the driving shaft, and connecting and matching the conical pin 5 between the fan shaft and the coupling 14 and the pin hole 6, and simultaneously combining the action of the gas channel 10, the sealing cavity 9, the sliding piston 11 and the push plate 7 to drive the coupling 14 to slide back and forth, the adjustment of matching of the conical pin 5 and the pin hole 6 is realized, the connection adjustment of the coupling 14 and the fan shaft is further controlled, the adaptability adjustment caused by thermal expansion and cold contraction due to temperature change is realized, the rotation stability of the whole part in the use process can be better improved, and the service life of each part is prolonged.
In order to realize that the coupler 14 can slide back and forth without influencing the rotation of the coupler 14 along with the driving device, the coupler 14 is of a cylindrical structure with one open end and the other closed end, one open end of the coupler 14 is sleeved on a driving shaft of the driving device, a sliding groove is formed in the inner side wall of the coupler 14, a flat key is arranged on the driving shaft, the flat key is slidably mounted in the sliding groove, the driving shaft can drive the coupler 14 to rotate through the flat key through the matching of the flat key and the sliding groove in the use process, and meanwhile, in the specific design process, the length of the sliding groove is not smaller than the height of the cavity 9 of the sealed cavity 9, so that the coupler can adapt to the movement of the push plate 7 caused by the temperature.
In a specific use, the diameter of one end of the tapered pin 5 at the front side is smaller than that of one end at the rear side, and the taper of the tapered pin 5 is 1: 10-1:20, the taper design is selected according to the different selected gases in a matching way, because the different gases have different expansion rates due to different temperatures, the expansion rates are different through a plurality of tests, the deformation characteristics of the gases and the fan shaft at different temperatures are carried out, the correlation between the gases and the fan shaft is found out, the expansion of the gases can be adjusted on the coupler 14 after conversion, the relationship between the gases and the coupler is not necessarily a linear relationship, the selection of which gas in which temperature range is needed to achieve the best effect needs to be specifically considered, and meanwhile, when the taper design is specifically used, the corresponding effect can be achieved by arranging an intermediate conversion part.
Preferably, the outer edge of the coupler 14 is provided with an annular boss 13, the push plate 7 is arranged at the rear side of the annular boss 13, the push plate 7 is rotatably connected with the annular boss 13, and the push plate 7 can push the coupler 14 to slide back and forth through the annular boss 13; under the condition of this embodiment, push pedal 7 can realize sliding from beginning to end under the effect of atmospheric pressure and spring 8, and then drives the removal of shaft coupling 14 through annular boss 13, is the swivelling joint between push pedal 7 and the annular boss 13, when push pedal 7 drives shaft coupling 14 and slides from beginning to end, can not influence shaft coupling 14 along with the rotation of drive shaft.
In order to enable the change of the air pressure to be more stable and regular, the outer side of the air channel 10 is wrapped with a heat insulation layer, the heat insulation layer covers the whole air channel from the end of the partition plate 2 to the inside of the sealed cavity 9 of the air channel 10, so that the temperature change of the air can only sense the temperature change in a test area, and through the design that the sealed heat conducting heads 12 are distributed in the test area, the sealed heat conducting heads 12 are uniformly distributed in the test area, so that the temperature sensing is more uniform, the effect is more stable, and the cross sectional area of the sealed heat conducting heads 12 is 2-4 times of the diameter of the pipeline of the air channel 10, so that the temperature sensing is more obvious.
The adjustable coupler 14 and the design of the connecting pin-conical pin 5 on the coupler 14 can well adapt to expansion with heat and contraction with cold caused by temperature change, so that the stable operation effect of each component is achieved, the service life of each component can be further prolonged, and meanwhile, the adjustment mode through air pressure control is designed for the first time, so that the adjustment is more targeted and accurate.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The high-low temperature damp-heat test box is characterized by comprising a box body (1), wherein a vertically-placed partition plate (2) is arranged inside the box body (1), the partition plate (2) divides the box body (1) into a test area and a connection area, the partition plate (2) is connected with a circulating fan which is transversely arranged in the front and at the back, the circulating fan comprises a fan blade part (3) and a fan shaft part (4), the fan blade part (3) is positioned in the test area, the fan shaft part (4) is positioned in the connection area, the rear side wall of the connection area is provided with a driving device, the driving device is connected with a fan shaft through a coupler (14), the end face of the coupler (14) connected with the fan shaft is provided with a plurality of taper pins (5), and the end face of the fan shaft connected with the coupler (14) is provided with pin holes (6) matched with the taper pins (5), the conical pin (5) is inserted into the corresponding pin hole (6), a push plate (7) capable of sliding back and forth is arranged outside the coupling (14), the rear side of the push plate (7) and the test area are connected with a spring (8), the push plate (7) can drive the coupler (14) to slide back and forth, the front end of the push plate (7) is provided with a plurality of piston rods which are evenly distributed on the circumference, the front side of the push plate (7) is provided with a plurality of sealing cavities (9) which are in one-to-one correspondence with the piston rods, the front end of the piston rod is connected with a sliding piston (11) arranged in the sealed cavity (9), the side wall of the sealed cavity (9) is provided with a gas channel (10), the connecting port of the gas channel (10) is positioned at the upper part of the sliding piston (11), the other end of the gas channel (10) leads to one end of the clapboard (2), and the gas channel (10) is arranged in one end of the clapboard (2) and is provided with a sealing heat conduction head (12).
2. The high-low temperature damp-heat test box according to claim 1, wherein the coupling (14) is a cylinder structure with one open end and the other closed end, one open end of the coupling (14) is sleeved on a driving shaft of the driving device, a sliding groove is formed in the inner side wall of the coupling (14), a flat key is arranged on the driving shaft, and the flat key is slidably mounted in the sliding groove.
3. A hot and humid test chamber under high and low temperature as claimed in claim 3, wherein the front end of said tapered pin (5) has a smaller diameter than the rear end, and the taper of said tapered pin (5) is 1: 10-1:20.
4. The high-low temperature damp-heat test box according to claim 1, wherein an annular boss (13) is arranged on the outer edge of the coupler (14), the push plate (7) is rotatably connected with the annular boss (13), the push plate (7) is attached to the annular boss (13), and the push plate (7) can push the coupler (14) to slide back and forth through the annular boss (13).
5. The high-low temperature damp-heat test chamber according to claim 1, characterized in that the outer side of the gas channel (10) is wrapped with a heat insulation layer (15), and the heat insulation layer (15) covers the whole gas channel from the end of the partition plate (2) to the inside of the sealed cavity (9) of the gas channel (13).
6. A high-low temperature thermal-humidity test chamber as claimed in claim 5, wherein the gas passage (10) is filled with one or more of nitrogen, helium and argon.
7. The high-low temperature damp-heat test chamber according to claim 1, wherein a bearing is arranged at the connecting and matching part of the fan shaft and the partition plate (2), and a bearing pressing plate for fixing the bearing is arranged in the connecting area.
8. The high-low temperature damp-heat test chamber according to claim 1, wherein the sealing heat conducting heads (12) are uniformly distributed on the periphery of the fan blade parts (3), and the cross-sectional area of the sealing heat conducting heads (12) is 2-4 times of the diameter of the pipeline of the gas channel (10).
9. The high-low temperature damp-heat test chamber according to claim 1, wherein the cross section of the push plate (7) is one of a square shape, a pentagon shape and a triangle shape, and the push plate (7) can only slide back and forth and can not rotate.
10. The high-low temperature damp-heat test chamber as claimed in any one of claims 1 to 9, wherein the connection region is internally provided with a fixing seat for fixing and guiding the fan shaft, and the inner wall of the fixing seat is provided with an elastic layer wrapped on the outer edge of the fan shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010951502.8A CN112044481B (en) | 2020-09-11 | 2020-09-11 | High-low temperature damp-heat test box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951502.8A CN112044481B (en) | 2020-09-11 | 2020-09-11 | High-low temperature damp-heat test box |
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| CN112044481A true CN112044481A (en) | 2020-12-08 |
| CN112044481B CN112044481B (en) | 2021-12-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639694A (en) * | 2021-08-12 | 2021-11-12 | 中国人民解放军63837部队 | Cycle life test method of deep low-temperature blade tip clearance sensor |
| CN117129822A (en) * | 2023-06-26 | 2023-11-28 | 盛吉盛智能装备(江苏)有限公司 | Temperature homogenizing module and memory chip test sorting machine |
| CN117160547A (en) * | 2023-10-25 | 2023-12-05 | 南京浦蓝大气环境研究院有限公司 | Atmospheric environment simulation device adaptable to various environments |
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| US5616855A (en) * | 1995-10-18 | 1997-04-01 | Ball; Dean M. | Method and apparatus for measuring viscosity |
| US6657821B1 (en) * | 2001-09-28 | 2003-12-02 | Hutchinson Technology Incorporated | Hand suspension with compliant locating feature |
| CN203397229U (en) * | 2013-07-04 | 2014-01-15 | 江苏白雪电器股份有限公司 | High and low temperature test box |
| CN209222154U (en) * | 2018-12-10 | 2019-08-09 | 重庆英博实验仪器有限公司 | A kind of energy saving and environment friendly high-precision high-and-low temperature humid heat test box |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5616855A (en) * | 1995-10-18 | 1997-04-01 | Ball; Dean M. | Method and apparatus for measuring viscosity |
| US6657821B1 (en) * | 2001-09-28 | 2003-12-02 | Hutchinson Technology Incorporated | Hand suspension with compliant locating feature |
| CN203397229U (en) * | 2013-07-04 | 2014-01-15 | 江苏白雪电器股份有限公司 | High and low temperature test box |
| CN209222154U (en) * | 2018-12-10 | 2019-08-09 | 重庆英博实验仪器有限公司 | A kind of energy saving and environment friendly high-precision high-and-low temperature humid heat test box |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639694A (en) * | 2021-08-12 | 2021-11-12 | 中国人民解放军63837部队 | Cycle life test method of deep low-temperature blade tip clearance sensor |
| CN117129822A (en) * | 2023-06-26 | 2023-11-28 | 盛吉盛智能装备(江苏)有限公司 | Temperature homogenizing module and memory chip test sorting machine |
| CN117129822B (en) * | 2023-06-26 | 2024-04-16 | 盛吉盛智能装备(江苏)有限公司 | Temperature homogenizing module and memory chip test sorting machine |
| CN117160547A (en) * | 2023-10-25 | 2023-12-05 | 南京浦蓝大气环境研究院有限公司 | Atmospheric environment simulation device adaptable to various environments |
| CN117160547B (en) * | 2023-10-25 | 2024-01-02 | 南京浦蓝大气环境研究院有限公司 | Atmospheric environment simulation device adaptable to various environments |
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| CN112044481B (en) | 2021-12-28 |
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