CN203389658U - High-low temperature resistant test chamber - Google Patents
High-low temperature resistant test chamber Download PDFInfo
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- CN203389658U CN203389658U CN201320394091.2U CN201320394091U CN203389658U CN 203389658 U CN203389658 U CN 203389658U CN 201320394091 U CN201320394091 U CN 201320394091U CN 203389658 U CN203389658 U CN 203389658U
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- fan
- low temperature
- temperature resistant
- fan shaft
- thermal insulation
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Abstract
The utility model relates to a high-low temperature resistant test chamber comprising a thermal-insulating and closed box body, a temperature control system and a circulating fan, wherein the temperature control system is used for cooling and/or heating the internal environment of the box body; the circulating fan is arranged on the box body and comprises a motor which is arranged at the outer side of the box body, a fan shaft which is rotatably connected to the box body through a bearing, and a plurality of fan blades which are located in the box body; one end part of the fan shaft is coaxially and fixedly connected with an output shaft of the motor, and the other end part of the fan shaft is fixedly connected with the fan blades after passing through the box body; a thermal-insulating sleeve is arranged on the outer side of the part, in the box body, of the fan shaft in a sleeved manner. According to the high-low temperature resistant test chamber, the fan shaft is separated from a large temperature variation area through the thermal-insulating sleeve, so that heat transfer is reduced, a temperature difference between the fan shaft and the bearing is further reduced, and the circulating fan can run normally in an overall temperature variation environment.
Description
Technical field
The utility model relates to a kind of high-low temperature test chamber, particularly across the large temperature difference, carries out the chamber of reliability testing.
Background technology
When the Design and manufacture of some important spare parts or finished product, for understanding product in the service behaviour of extreme environment, conventionally can to product, carry out high temperature to low-temperature test, the reliability of working with testing product under extreme environment.
For guarantee test case temperature evenly, the circulating fan vitals that is absolutely necessary.Because the variation of chamber temperature is often larger, what its variations in temperature was larger can be between-100～+ 200 ℃, therefore the frame for movement of fan will be subject to the test that this large temperature becomes equally, especially the motion parts that has matching relationship, as the axle in circulating fan structure, the cooperation of bearing block and bearing, because the in the situation that of-100 ℃ for much more general temperature-resistant material 304 stainless steels that adopt of mechanical performance that guarantee material are as the material of axle and bearing block, simultaneously no matter you use ceramic bearing or their coefficient of expansion of high-temperature bearing is less than 304 stainless steel materials more, and there is a larger difference.Therefore when temperature is too low, there will be the increase in the gap of fitted shaft and bearing, when excess Temperature, can cause again matching allowance excessive and cause bearing damage.
When the fan that therefore how to solve high-low temperature resistant chamber changes between from extremely low temperature to excessive temperature, the dilatancy amount of fan shaft and bearing is different, causes short problem of fan fluctuation of service and service life, is perplexing the R&D personnel always.
Summary of the invention
The purpose of this utility model is to provide a kind of test the temperature inside the box that can reduce to the high-low temperature resistant chamber of the heat transmission of fan shaft.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of high-low temperature resistant chamber, comprise the casing that thermal insulation is airtight, the temperature control system that the internal environment of described casing is freezed and/or heated, be arranged on the circulating fan on described casing, described circulating fan comprises: the motor that is arranged on described casing outside, by bearing rotary, be automatically connected in the fan shaft on described casing, be positioned at the multi-disc fan blade of described casing, one end of described fan shaft is coaxially fixedly connected with the output shaft of described motor, the other end is fixedly connected with the fan blade described in multi-disc through described casing, the part outside that described fan shaft is positioned at described casing is arranged with thermal insulation cover.
Preferably, described thermal insulation cover comprises shell and is filled in the insulation material in described shell.
Preferably, described insulation material is ceramic fibre.
Preferably, the constituent material of described shell is stainless steel.
Preferably, described shell radially extends and this end of described thermal insulation cover is sealed to described fan shaft in the fan blade Zuo one end away from described.
Preferably, on described casing, be installed with bearing block, described bearing is fixedly mounted on described bearing block, and described box inside has the bearing cap being fixedly mounted on described bearing block.
Preferably, described fan the tip of the axis is fixedly connected with fan blade seat, and the fan blade described in multi-disc is fixedly connected on respectively on described fan blade seat.
Preferably, described fan blade seat has and on the ，Gai end, end connecting with described thermal insulation cover, offers the annular groove that the external diameter with described thermal insulation cover matches, and described thermal insulation cover is stuck in this annular groove.
Preferably, on described fan blade seat, there is axle installing hole, the end of described fan shaft is inserted in described axle installing hole, and the part inwall of described axle installing hole is to projecting inward and be pushed against on the outer circle wall of described fan shaft, remainder inwall with described fan shaft noncontact.
Preferably, the outer circle wall of described fan shaft is less than non-contacting area with the area that the inwall of described axle installing hole contacts.
The utility model takes to reduce the method for the temperature change value of axle and bearing block.Adopt the temperature of axle and bearing block is at high temperature reduced, the method raising when low temperature reduces the warm variate of axle.Adopt simultaneously and reduce the measure of temperature to component affecting, as use heat-barrier material to reduce the impact of temperature on fan shaft, by reducing the heat conduction contact-making surface of fan shaft and increasing its area of dissipation and efficiency, etc. multinomial measure, can significantly reduce the variations in temperature of fan shaft and bearing block, thereby the impact of the acute variation of having avoided Yin Wendu on fan shaft and bearing fit, improve the working environment of bearing simultaneously, even can adopt plain bearing to replace ceramic bearing or high-temperature bearing.
Because technique scheme is used, the utility model compared with prior art has following advantages: the utility model can improve bearing running environment, adopt circulation wind blower structure of the present utility model, can reach without ceramic bearing or high-temperature bearing, only adopt plain bearing just can meet the normal operation of circulating fan under large temperature changing environment, obtained good effect.
Accompanying drawing explanation
Accompanying drawing 1 is main cutaway view of the present utility model;
Accompanying drawing 2 is the sectional view of A-A in accompanying drawing 1;
Accompanying drawing 3 is the partial enlarged view at B place in accompanying drawing 1;
In above accompanying drawing: 1, circulating fan; 10, motor; 101, output shaft; 11, fan shaft; 110, shaft coupling; 12, bearing block; 121, bearing block body; 122, flange; 123, bearing; 124, bearing cap; 13, thermal insulation cover; 131, shell; 132, ceramic fibre; 14, fan blade seat; 141, axle installing hole; 142, annular groove; 15, fan blade; 16, motor cabinet; 161, thermovent; 17, radiating fin; 171, fan sheet; 18, flat key;
2, casing; 21, cabinet exterior; 22, cabinet wall; 23, heat-insulation layer;
3, Wen Bianqu.
The specific embodiment
Below in conjunction with the drawings and the specific embodiments to the utility model be further described (described in this description " on ", D score direction is corresponding with the upper and lower position relation shown in accompanying drawing 1 respectively):
The utility model discloses a kind of high-low temperature test chamber, can carry out to product the shock-testing of limiting temperature test and variations in temperature.This chamber comprises the airtight casing of thermal insulation 2, the internal environment of described casing 2 is freezed and/or the temperature control system (not shown) that heats, is arranged on the circulating fan 1 on described casing 2.During test, article to be measured are placed in the Wen Bianqu 3 in case, temperature control system can be freezed or heat the environment temperature in Wen Bianqu 3 at short notice, and circulating fan 1 can make air in Wen Bianqu 3 form circulation, thereby makes in case temperature everywhere be uniformly distributed.
Described casing 2 comprises cabinet exterior 21, cabinet wall 22 and is filled in described cabinet wall 22 and the thermal insulation layer 23 between cabinet exterior 21, this cabinet exterior 21 and cabinet wall 22 are selected the stainless steel material that heat conductivility is good, and thermal insulation layer 23 can be selected expanded material.
As shown in Figure 1, described circulating fan 1 comprises: by motor cabinet 16 be arranged on described casing 2 outsides motor 10, the fan shaft 11 being connected with output shaft 101 coaxial transmissions of motor 10, be fixedly mounted on bearing block 12 on casing 2, be fixedly connected on fan shaft 11 ends fan blade seat 14, be locked at the multi-disc fan blade 15 on this fan blade seat 14.
For reducing the impact of variation of ambient temperature on fan shaft, the utility model has adopted following measures:
One, utilize fin to dispel the heat to fan shaft, reduce the temperature of fan shaft.
Described fan shaft 11 upper end is coaxially fixedly connected with by shaft coupling 110 with the output shaft of described motor, the outside of shaft coupling 110 is welded with radiating fin 17, radiating fin 17 contacts with fan shaft 11 heat conduction, when test starts, motor 10 energisings, fan shaft 11 rotates, and drives radiating fin 17 to rotate, thereby rapidly the temperature of fan shaft 11 is distributed to external environment.
Because radiating fin 17 is positioned at motor cabinet 16, for making radiating fin 17 distribute heat as early as possible, on described motor cabinet 16, offer a plurality of thermovents 161.
In preferred embodiment of the present utility model, this radiating fin 17 includes a plurality of fan sheets 171 that radially extend, and in other embodiment, this radiating fin can also consist of multiple other form structures.
Radiating fin 17 is between motor 10 and bearing block 12, and bottom is near bearing block 12, so radiating fin 17 is when rotate, can also be to bearing block 12 coolings.
Two, increase the contact area of bearing block and cabinet exterior, the temperature of bearing block is distributed by cabinet exterior.
As shown in the figure, described bearing block 12 comprises the bearing block body 121 being nested in described thermal insulation layer 23 and is connected to the flange 122 on described cabinet exterior 21, flange 122 has the heat-conductive connection part parallel with cabinet exterior 21, the heat-conductive connection part of described flange 122 contacts with described cabinet exterior 21 heat conduction, and is locked by bolt and motor cabinet 16 and cabinet exterior 21.
Described casing 2 inner sides have the bearing cap 124 that is fixedly mounted on described bearing block 12 bottoms, and bearing cap 124 can further reduce the heat conduction of 3 pairs of bearing blocks of Wen Bianqu, avoids steam to enter in bearing block simultaneously.
Three, utilize thermal insulation cover to reduce the impact on fan shaft of variations in temperature in isolated Wen Bianqu.
As shown in the figure, the outside that is positioned at the part fan shaft 11 of described casing 2 is arranged with thermal insulation cover 13.Described thermal insulation cover 13 comprises shell 131 and the insulation material being filled in described shell 131, and described insulation material is ceramic fibre 132, and the constituent material of described shell 131 is stainless steel.
For preventing the heat insulation effect of the influence of moisture ceramic fibre in chamber, described thermal insulation Tao two ends are all sealed.Say further, the upper end edge of described shell 131 radially extends and by described thermal insulation Tao13 upper end sealing, can avoid like this impact of moisture on ceramic fibre thermal insulation layer thermal conductivity factor to the axial line of described fan shaft.And thermal insulation Tao13 lower end is closely connected with fan blade seat 14, fan blade Zuo14 upper end offers the annular groove 142 that the external diameter with thermal insulation cover 13 matches, described thermal insulation cover 13 is stuck in this annular groove 142, thereby avoids steam to enter ceramic fibre from thermal insulation Tao bottom.
The most regions that are positioned at Wen Bianqu due to fan shaft are all covered by thermal insulation cover, and therefore, the gas greatly reducing in fan shaft and Wen Bianqu carries out the contact-making surface of heat transfer contact, thereby reach, reduce the object that fan axle temperature becomes.
Four, reduce the heat conduction contact area of fan shaft and fan blade seat.
As shown in Figure 3, on described fan blade seat 14, there is axle installing hole 141, described fan shaft 11 bottom is inserted in described axle installing hole 141, the part inwall of described axle installing hole is to projecting inward and be pushed against on the outer circle wall of described fan shaft 11, and the remainder inwall of axle installing hole does not contact with described fan shaft 11.Because fan blade seat 14 and fan blade 15 are all directly exposed in Wen Bianqu 3, therefore its temperature changes very fast with test temperature, and fan blade seat 14 directly contacts with fan shaft 11 and heat will be directly passed to fan shaft 11, and after reducing both contacts area, can reduce heat-transfer rate.Preferably, the outer circle wall of described fan shaft 11 is less than non-contacting area with the area that the inwall of described axle installing hole contacts.
In the present embodiment, described fan shaft 11 is connected by key with described fan blade seat 14.There are two parts in the region that the described interior and described fan shaft 11 of axle installing hole contacts, and two parts region lays respectively at the two ends of described axle installing hole.
Comprehensive above-mentioned introduction, the utility model one is to adopt fan shaft thermal insulation cover that exposed fan shaft lower end and Wen Bianqu at Wen Bianqu isolated, and changes the direct transmit mode of temperature to fan shaft, reduces the transmission of temperature to fan shaft.The 2nd, reduce fan blade seat the contact area connecting is installed with fan shaft, the transmission channels of temperature is diminished, effectively weaken the impact of temperature on fan shaft.The 3rd, by the shaft coupling outer wall welding radiating fin in fan shaft upper end, make fan on the one hand the temperature of fan shaft is delivered to surrounding environment fast by shaft coupling and radiating fin in High Rotation Speed process, the High Rotation Speed of radiating fin has been accelerated flowing of air on the other hand, makes it possible to by motor cabinet, the efficiency of the temperature of bearing block environment transmission is towards periphery improved.Finally, the flange of bearing block is arranged on cabinet exterior, with steel plate, contacts closely equally and the temperature of bearing block can be delivered to environment space fast by casing large-area steel plate.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (10)
1. a high-low temperature resistant chamber, comprise the casing that thermal insulation is airtight, the temperature control system that the internal environment of described casing is freezed and/or heated, be arranged on the circulating fan on described casing, described circulating fan comprises: the motor that is arranged on described casing outside, by bearing rotary, be automatically connected in the fan shaft on described casing, be positioned at the multi-disc fan blade of described casing, one end of described fan shaft is coaxially fixedly connected with the output shaft of described motor, the other end is fixedly connected with the fan blade described in multi-disc through described casing, it is characterized in that: the part outside that described fan shaft is positioned at described casing is arranged with thermal insulation cover.
2. a kind of high-low temperature resistant chamber according to claim 1, is characterized in that: described thermal insulation cover comprises shell and is filled in the insulation material in described shell.
3. a kind of high-low temperature resistant chamber according to claim 2, is characterized in that: described insulation material is ceramic fibre.
4. a kind of high-low temperature resistant chamber according to claim 2, is characterized in that: the constituent material of described shell is stainless steel.
5. a kind of high-low temperature resistant chamber according to claim 2, is characterized in that: described shell radially extends and this end of described thermal insulation cover is sealed to described fan shaft in the fan blade Zuo one end away from described.
6. a kind of high-low temperature resistant chamber according to claim 1, it is characterized in that: on described casing, be installed with bearing block, described bearing is fixedly mounted on described bearing block, and described box inside has the bearing cap being fixedly mounted on described bearing block.
7. a kind of high-low temperature resistant chamber according to claim 1, is characterized in that: described fan the tip of the axis is fixedly connected with fan blade seat, and the fan blade described in multi-disc is fixedly connected on respectively on described fan blade seat.
8. a kind of high-low temperature resistant chamber according to claim 7, it is characterized in that: described fan blade seat has the end connecting with described thermal insulation cover, on this end, offer the annular groove that the external diameter with described thermal insulation cover matches, described thermal insulation cover is stuck in this annular groove.
9. a kind of high-low temperature resistant chamber according to claim 7, it is characterized in that: on described fan blade seat, there is axle installing hole, the end of described fan shaft is inserted in described axle installing hole, the part inwall of described axle installing hole is to projecting inward and be pushed against on the outer circle wall of described fan shaft, remainder inwall with described fan shaft noncontact.
10. a kind of high-low temperature resistant chamber according to claim 9, is characterized in that: the outer circle wall of described fan shaft is less than non-contacting area with the area that the inwall of described axle installing hole contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394091.2U CN203389658U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394091.2U CN203389658U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203389658U true CN203389658U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320394091.2U Expired - Lifetime CN203389658U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN203389658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073192A (en) * | 2017-12-06 | 2018-05-25 | 上海华力微电子有限公司 | A kind of intelligent gas hood based on high/low-temperature impact system |
-
2013
- 2013-07-04 CN CN201320394091.2U patent/CN203389658U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073192A (en) * | 2017-12-06 | 2018-05-25 | 上海华力微电子有限公司 | A kind of intelligent gas hood based on high/low-temperature impact system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |
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| CX01 | Expiry of patent term |