CN203389657U - High-low temperature resistant test chamber - Google Patents
High-low temperature resistant test chamber Download PDFInfo
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- CN203389657U CN203389657U CN201320394007.7U CN201320394007U CN203389657U CN 203389657 U CN203389657 U CN 203389657U CN 201320394007 U CN201320394007 U CN 201320394007U CN 203389657 U CN203389657 U CN 203389657U
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- fan
- shaft
- fan shaft
- low temperature
- temperature resistant
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Abstract
The utility model relates to a high-low temperature resistant test chamber. The high-low temperature resistant test chamber comprises a thermal insulated airtight box body, a temperature control system for refrigerating and/or heating the internal environment of the box body, and a circulating fan arranged on the box body, wherein the circulating fan comprises a motor arranged outside the box body, a fan shaft rotatably connected to the box body through a bearing, and a plurality of fan blades arranged in the box body, one end of the fan shaft and the output shaft of the motor are coaxially fixed and connected, the other end of the fan shaft penetrates through the box body and is fixedly connected with a fan blade base, the plurality of fan blades are respectively fixed and connected to the fan blade base, the fan blade base is provided with a shaft installation hole, the end part of the fan shaft is inserted in the shaft installation hole, part of the internal wall of the shaft installation hole is protruded inwards and props against the outer circumferential wall of the fan shaft, and the rest part of the internal wall of the shaft installation hole is not contacted with the fan shaft. As the contact area of the fan shaft and the fan blade base is reduced, heat directly transferred to the fan shaft is reduced, and the problems of stability and reliability of cooperation between the shaft and the bearing seat as well as the bearing in large temperature difference environment are solved.
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 test 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 of described fan shaft is through described casing and be fixedly connected with fan blade seat, fan blade described in multi-disc is fixedly connected on respectively on described fan blade seat, 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.
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.
Preferably, described fan shaft is connected by key with described fan blade seat.
Preferably, there are two parts in the region that the described interior and described fan shaft of axle installing hole contacts, and two parts region lays respectively at the two ends of described axle installing hole.
Preferably, the outside of described fan shaft is arranged with thermal insulation cover.
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, described thermal insulation is enclosed within away from described fan blade Zuo one end and radially seals.
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.
Because technique scheme is used, the utility model compared with prior art has following advantages: the utility model is by reducing the contact area of fan shaft and fan blade seat, reduced the direct transmission of heat to fan shaft, thereby the variations in temperature of fan shaft and bearing block under large temperature difference environment is controlled preferably, so just solved stability and the integrity problem of large temperature difference environment lower shaft and bearing block and bearing fit.
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, obtain 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 (8)
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, it is characterized in that: the other end of described fan shaft is through described casing and be fixedly connected with fan blade seat, fan blade described in multi-disc is fixedly connected on respectively on described fan blade seat, 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.
2. high-low temperature resistant chamber according to claim 1, 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.
3. high-low temperature resistant chamber according to claim 1, is characterized in that: described fan shaft is connected by key with described fan blade seat.
4. high-low temperature resistant chamber according to claim 1, is characterized in that: there are two parts in the region that the described interior and described fan shaft of axle installing hole contacts, and two parts region lays respectively at the two ends of described axle installing hole.
5. high-low temperature resistant chamber according to claim 1, is characterized in that: the outside of described fan shaft is arranged with thermal insulation cover.
6. high-low temperature resistant chamber according to claim 5, 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.
7. high-low temperature resistant chamber according to claim 5, is characterized in that: described thermal insulation is enclosed within away from described fan blade Zuo one end and radially seals.
8. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394007.7U CN203389657U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394007.7U CN203389657U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203389657U true CN203389657U (en) | 2014-01-15 |
Family
ID=49901219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320394007.7U Expired - Lifetime CN203389657U (en) | 2013-07-04 | 2013-07-04 | High-low temperature resistant test chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203389657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190481A (en) * | 2014-08-27 | 2014-12-10 | 重庆展尔岭科技有限责任公司 | Drawer-type sealed test box |
-
2013
- 2013-07-04 CN CN201320394007.7U patent/CN203389657U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190481A (en) * | 2014-08-27 | 2014-12-10 | 重庆展尔岭科技有限责任公司 | Drawer-type sealed test box |
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Legal Events
| 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 |