CN107605800A - Blower fan is flexible coupling and blower fan - Google Patents

Blower fan is flexible coupling and blower fan Download PDF

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Publication number
CN107605800A
CN107605800A CN201710999168.1A CN201710999168A CN107605800A CN 107605800 A CN107605800 A CN 107605800A CN 201710999168 A CN201710999168 A CN 201710999168A CN 107605800 A CN107605800 A CN 107605800A
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CN
China
Prior art keywords
air duct
blower fan
flange
silica gel
flexible coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710999168.1A
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Chinese (zh)
Inventor
李福运
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Haiyuexing Science & Technology Co Ltd
Original Assignee
Beijing Haiyuexing Science & Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Haiyuexing Science & Technology Co Ltd filed Critical Beijing Haiyuexing Science & Technology Co Ltd
Priority to CN201710999168.1A priority Critical patent/CN107605800A/en
Publication of CN107605800A publication Critical patent/CN107605800A/en
Pending legal-status Critical Current

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Abstract

It is flexible coupling the invention provides a kind of blower fan and blower fan, is related to the technical field of blower fan, blower fan is flexible coupling including air duct, two silica gel flanges and two supported flanges;Air duct is enclosed by glass fabric to be set in a ring, and silicon rubber is coated with glass fabric;Two silica gel flanges are respectively fixedly connected with the both ends of air duct;Two supported flanges are set on the outer wall of air duct, and each supported flange respectively with one of silica gel flange while abut.In use, the both ends of air duct are fixedly connected by supported flange with air channel, and silica gel flange is arranged between supported flange and air channel.Because air duct is Silicone Rubber Coated glass fabric, this material compares that traditional quality of rubber materials is more environmentally-friendly and high temperature resistant;In addition, the setting of silica gel flange can fill the space of air duct and air channel junction, the seal of junction is improved, and reduce noise.

Description

Blower fan is flexible coupling and blower fan
Technical field
The present invention relates to blower fan technical field, it is flexible coupling more particularly, to a kind of blower fan and blower fan.
Background technology
Blower fan is by the mechanical energy of input, improves gas pressure and supplies gas side by side the machinery of body, it is a kind of driven stream Body machinery.Blower fan is widely used in the ventilation, dust discharge and cooling of factory, mine, tunnel, cooling tower, vehicle, ship and building, The ventilation of boiler and industrial furnace and air inducing;Cooling and ventilation in the apparatus of air conditioning and domestic electric appliance;The baking of cereal Do and select and recommend, inflation and propulsion of wind-tunnel wind regime and aircushion vehicle etc..
Due to blower fan airborne noise caused by operation can seriously affect staff normal work, life And health, so by the way that in air inlet, air outlet position, using a kind of flexible connection accessory, it is as ventilating system It the component parts of pipeline, can so separate being rigidly connected for airduct, reduce issuable common between blower fan import and export and air channel Shake, plays a part of Jing Yin noise reduction.
The product that is flexible coupling used at present is mainly quality of rubber materials, and elastomeric material is mainly nitrile rubber, ethylene-propylene-diene monomer Glue, neoprene etc..Although the product that is flexible coupling of such material can also play a part of noise reduction, used material is in ring Guarantor, high temperature resistant, fire-retardant aspect are not very superior;And it is poor with the seal of the junction in air channel to be flexible coupling.
The content of the invention
It is flexible coupling it is an object of the invention to provide a kind of blower fan and blower fan, to improve soft company present in prior art Material used in connecing is poor in the effect of environmental protection, high temperature resistant, fire-retardant aspect;And it is closed with the junction in air channel to be flexible coupling The poor technical problem of property.
Blower fan provided by the invention is flexible coupling, including air duct, two silica gel flanges and two supported flanges;Air duct is by glass Glass fiber cloth, which is enclosed, to be set in a ring, and silicon rubber is coated with glass fabric;Two silica gel flanges are respectively fixedly connected with air duct Both ends;Two supported flanges are set on the outer wall of air duct, and the one side of each supported flange respectively with one of silica gel The one side of flange abuts.
Further, silica gel flange is combined into one with air duct vulcanization.
Further, supported flange is interference fitted with air duct.
Further, two layers of glass fabric;Layer glass fiber cloth is fixedly connected, and between layer glass fiber cloth It is provided with bracing ring;Circumferential direction of the bracing ring along air duct is set.
Further, bracing ring is multiple;Bearing of trend of multiple bracing rings along air duct is arranged at intervals.
Further, glass fabric is multilayer;Multilayer woven glass fabric abuts successively.
Further, multiple first through hole for wearing bolt and multiple the are respectively arranged with silica gel flange and supported flange Two through holes;Multiple first through hole are correspondingly arranged with multiple second through holes respectively.
Further, air duct is in rectangular-shape;Silica gel flange is rectangular with supported flange, and silica gel flange is with compressing method Blue corner is provided with first through hole and the second through hole.
Further, air duct is cylindrical;Silica gel flange is rounded with supported flange.
Further, present invention also offers a kind of blower fan, blower fan to be flexible coupling including blower fan.
Blower fan provided by the invention is flexible coupling, including air duct, two silica gel flanges and two supported flanges.Using Cheng Zhong, the both ends of air duct are fixedly connected by supported flange with air channel, and silica gel flange is arranged between supported flange and air channel. Because air duct is Silicone Rubber Coated glass fabric, this material compares that traditional quality of rubber materials is more environmentally-friendly and high temperature resistant;Separately Outside, the setting of silica gel flange can fill the space of air duct and air channel junction, improve the seal of junction, and reduce and make an uproar Sound.
From the foregoing, it will be observed that the blower fan, which is flexible coupling, compares traditional product, and it is more environmentally-friendly, in high temperature resistant and the performance of fire-retardant aspect It is more superior;And blower fan is flexible coupling with the seal of air channel junction more preferably.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the front view that blower fan provided in an embodiment of the present invention is flexible coupling;
Fig. 2 is the sectional view in A-A directions in Fig. 1;
Fig. 3 is the front view that the blower fan that another embodiment of the present invention provides is flexible coupling;
Fig. 4 is the sectional view in B-B directions in Fig. 3.
Icon:1- air ducts;2- silica gel flanges;3- supported flanges;4- glass fabrics;5- bracing rings;6- first through hole;7- Second through hole.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, such as occur term " " center ", " on ", " under ", "left", "right", " vertical ", " level ", " interior ", " outer " etc., orientation or position relationship indicated by it are based on orientation shown in the drawings or position Relation, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must have There is specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, as occurred Term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
Fig. 1 is the front view that blower fan provided in an embodiment of the present invention is flexible coupling;Fig. 2 is the sectional view in A-A directions in Fig. 1; Fig. 3 is the front view that the blower fan that another embodiment of the present invention provides is flexible coupling;Fig. 4 is the sectional view in B-B directions in Fig. 3;Such as figure 1st, shown in Fig. 2, Fig. 3 and Fig. 4, the blower fan that the present embodiment provides is flexible coupling, including 1, two silica gel flange 2 of air duct and two Supported flange 3;Air duct 1 is enclosed by glass fabric 4 to be set in a ring, and silicon rubber is coated with glass fabric 4;Two silica gel methods Orchid 2 is respectively fixedly connected with the both ends of air duct 1;Two supported flanges 3 are set on the outer wall of air duct 1, and each supported flange 3 Respectively with one of silica gel flange 2 while abut.
Wherein, the connected mode of air duct 1 and two silica gel flanges 2 can be a variety of, such as:Rivet interlacement or bonding etc. Deng.
Further, supported flange 3 selects metal material.Such as:304 stainless steels can be selected in supported flange 3, compress Any surface finish of flange 3 is smooth.
Further, supported flange 3 can be Nian Jie with air duct 1;Or the junction of supported flange 3 and air duct 1 can be set Fixture is equipped with, fixture is used to supported flange 3 being fixedly connected with air duct 1, more steady so as to make air duct 1 be connected with air channel It is fixed.
Further, the both ends that blower fan is flexible coupling should be symmetrical arranged, and in use, be distinguished without using person, convenient User assembles, and improves efficiency.
Further, silicon rubber selects the silica gel elastomeric compound of vapor phase method food-grade, available for kitchen tools product, without Toxic Matter, Environmental Safety;In addition, the operating temperature range of the silicon rubber can have well in -50 DEG C to 250 DEG C long-term uses High-temperature stability.
Further, the fabric of glass fabric 4 has the spy such as environmentally friendly, fire-retardant, nontoxic, non-stimulated to skin and respiratory tract Point.
Further, fire retardant is added in the material of air duct 1.Fire retardant should select environment-protecting and non-poisonous material.So can not only Enough ensure using effect and security, additionally it is possible to the service life of extension fixture.
Further, the selected materials of air duct 1 are absorbing sound and lowering noise polymer composite, and the material is a kind of tool of environment-friendly type There is high performance novel inorganic light heat-insulating material, handled by special technology and production technology is process;It is more that it is internal Hole cavity structure, surface vitreous closing, the fillibility material being in granular form, there is light, excellent thermal insulation, fire prevention, sound-absorbing, resistance to High/low temperature, the excellent properties such as anti-aging, water absorption rate is small.
The blower fan that the present embodiment provides is flexible coupling, including 1, two silica gel flange 2 of air duct and two supported flanges 3. During use, the both ends of air duct 1 are fixedly connected by supported flange 3 with air channel, and silica gel flange 2 is arranged on supported flange 3 Between air channel.Because air duct 1 is Silicone Rubber Coated glass fabric 4, this material compares traditional quality of rubber materials more ring Guarantor and high temperature resistant;In addition, the setting of silica gel flange 2 can fill the space of air duct 1 and air channel junction, the close of junction is improved Closing property, and reduce noise.
From the foregoing, it will be observed that the blower fan, which is flexible coupling, compares traditional product, and it is more environmentally-friendly, in high temperature resistant and the performance of fire-retardant aspect It is more superior;And blower fan is flexible coupling with the seal of air channel junction more preferably.
On the basis of above-described embodiment, further, silica gel flange 2 is combined into one with the vulcanization of air duct 1.
Wherein, the combination process of silica gel flange 2 and air duct 1 is to use the accurate die pressing mould by special construction design, Entirety is combined into using the technique vulcanization of vulcanizing press molding vulcanization.
In the present embodiment, silica gel flange 2 is combined into one with the vulcanization of air duct 1.In use, this set is closed Performance is more preferable.
On the basis of above-described embodiment, further, supported flange 3 is interference fitted with air duct 1.
In the present embodiment, supported flange 3 is interference fitted with air duct 1.In use, supported flange 3 can be fixed on Ad-hoc location on the outer wall of air duct 1, air duct 1 can be so made to be connected with air channel more stable and close.
On the basis of above-described embodiment, further, glass fabric 4 is two layers;Layer glass fiber cloth 4, which is fixed, to be connected Connect, and bracing ring 5 is provided between layer glass fiber cloth 4;Circumferential direction of the bracing ring 5 along air duct 1 is set.
Wherein, bracing ring 5 can be steel ring or select other metal materials.
Further, it can be Nian Jie between bracing ring 5 and glass fabric 4, during the use of device, can keep away Exempt from bracing ring 5 due to rocking generation displacement, influence the stability that device uses.
Further, it can be bonding between layer glass fiber cloth 4, the outer wall of air duct 1 can not only be made to set more It is stable, additionally it is possible to which that position-limiting action is played to bracing ring 5.
Further, every layer of glass fabric 4 is coated with silicon rubber.
In the present embodiment, in use, bracing ring 5 can play a part of supporting the outer wall of air duct 1, and avoiding device exists Deformation is produced during use, causes ventilation not smooth;In addition, the setting of layer glass fiber cloth 4 can not only strengthen air duct 1 Performance, additionally it is possible to spacing effect is played to bracing ring 5, and prevents bracing ring 5 from directly contacting the inner side of air duct 1, makes bracing ring 5 Caused to damage by high temperature, the service life of extension fixture.
As shown in Figure 2 and Figure 4, on the basis of above-described embodiment, further, bracing ring 5 is multiple;Multiple bracing rings 5 are arranged at intervals along the bearing of trend of air duct 1.
Wherein, multiple bracing rings 5 can be arranged at intervals successively along the bearing of trend of air duct 1.This set can make air duct 1 Outer wall be more uniformly stressed, preferably play a part of support the outer wall of air duct 1.
Further, the setting quantity of bracing ring 5 can select according to the actual conditions that air duct 1 is set.
Such as:When the length of air duct 1 is 100mm, it can design and add 3 bracing rings 5.
In the present embodiment, bracing ring 5 is multiple.In use, multiple bracing rings 5 can preferably play support wind The effect of 1 outer wall of cylinder, prevents the outer wall of air duct 1 from producing deformation, improves the using effect of device.
On the basis of above-described embodiment, further, glass fabric 4 is multilayer;Multilayer woven glass fabric 4 supports successively Connect.
Wherein, it is coated with silicon rubber on every layer of glass fabric 4.
Further, the setting quantity of glass fabric 4 can select according to the actual conditions that air duct 1 is set.
In the present embodiment, glass fabric 4 is multilayer.In use, the setting of multilayer woven glass fabric 4 has more Good high temperature resistant and fire-retardant effect, it can so improve the performance of device.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, on the basis of above-described embodiment, further, silica gel flange 2 and pressure The multiple first through hole 6 for wearing bolt and multiple second through holes 7 are respectively arranged with tight flange 3;Multiple first through hole 6 respectively with Multiple second through holes 7 are correspondingly arranged.
Wherein, supported flange 3 can be Nian Jie with silica gel flange 2;Or it can be set between supported flange 3 and silica gel flange 2 Fixed structure is put, fixed structure is used to supported flange 3 being fixedly connected with silica gel flange 2, so as to make first on supported flange 3 The second through hole 7 on through hole 6 and silica gel flange 2 corresponds all the time, and then it is more stable to make air duct 1 be connected with air channel.
Further, circumferential direction of multiple first through hole 6 along silica gel flange 2 is arranged at intervals successively;Multiple second through holes 7 It is arranged at intervals successively along the circumferential direction of supported flange 3.
In the present embodiment, be respectively arranged with silica gel flange 2 and supported flange 3 multiple first through hole 6 for wearing bolt and Multiple second through holes 7.In use, screw bolt passes supported flange 3 and silica gel flange 2 and the bolt of air channel junction Hole coordinates, so as to which air duct 1 be fixedly connected with air channel.This set can improve the stability that air duct 1 is connected with air channel.
As depicted in figs. 1 and 2, on the basis of above-described embodiment, further, air duct 1 is in rectangular-shape;Silica gel flange 2 is rectangular with supported flange 3, and the corner of silica gel flange 2 and supported flange 3 is provided with first through hole 6 and second and led to Hole 7.
Wherein, air duct 1 can also be directed to the actual conditions that air channel is set and be arranged to irregular shape, such as:One end open is in Circle, another end opening are rectangular etc..
Further, when air duct 1 is in rectangular-shape, bracing ring 5 should be rectangular.
In the present embodiment, air duct 1 is in rectangular-shape.The air duct 1 of rectangular-shape is applied to the rectangular air channel of opening.Make During, the both ends of air duct 1 are connected with two air channels, so as to make two air channel connections.In addition, silica gel flange 2 is with compressing method The corner of orchid 3 is provided with the through hole 7 of first through hole 6 and second, can so make the endpoint location of junction connect and more step up It is close, improve the seal of junction.
As shown in Figure 3 and Figure 4, on the basis of above-described embodiment, further, air duct 1 is cylindrical;Silica gel flange 2 It is rounded with supported flange 3.
Wherein, the length of the axial direction of air duct 1 should be judged with the distance between two air channels port.
Further, when air duct 1 is cylindrical, bracing ring 5 should be rounded.
In the present embodiment, air duct 1 is cylindrical.Columned air duct 1 is applied to the rounded air channel of opening.Using Cheng Zhong, the both ends of air duct 1 are connected with two air channels, so as to make two air channel connections.
On the basis of above-described embodiment, further, the embodiment of the present invention additionally provides a kind of blower fan, and blower fan includes wind Machine is flexible coupling.
Wherein, blower fan includes air channel, and air channel is flexible coupling with blower fan to be fixedly connected.
Further, multiple bolts hole are may be provided with air channel.In use, multiple bolts hole and silica gel flange 2 On multiple first through hole 6 and multiple second through holes 7 on supported flange 3 correspond and set.
Further, it can be multiple that blower fan, which is flexible coupling,.Multiple blower fans, which are flexible coupling, to be sequentially connected;Or the soft company of blower fan Connect and be arranged at intervals successively with air channel.
In the present embodiment, blower fan is flexible coupling including blower fan.In use, the both ends of air duct 1 pass through supported flange 3 It is fixedly connected with air channel, silica gel flange 2 is arranged between supported flange 3 and air channel.Because air duct 1 is Silicone Rubber Coated glass fibers Tie up cloth 4, this material compares that traditional quality of rubber materials is more environmentally-friendly and high temperature resistant;In addition, the setting of silica gel flange 2 can fill Air duct 1 and the space of air channel junction, improve the seal of junction, and can reduce noise.
From the foregoing, it will be observed that the blower fan compares traditional product, and it is more environmentally-friendly, it is more excellent in the performance of high temperature resistant and fire-retardant aspect More;And its blower fan is flexible coupling with the seal of air channel junction more preferably.
Finally it should be noted that:Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations;To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that:Its according to The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (10)

1. a kind of blower fan is flexible coupling, it is characterised in that including:Air duct, two silica gel flanges and two supported flanges;
The air duct is enclosed by glass fabric to be set in a ring, and silicon rubber is coated with the glass fabric;Two silicon Glue flange is respectively fixedly connected with the both ends of the air duct;Two supported flanges are set on the outer wall of the air duct, and Each supported flange respectively with one of them described silica gel flange while abut.
2. blower fan according to claim 1 is flexible coupling, it is characterised in that the silica gel flange combines with air duct vulcanization Integrally.
3. blower fan according to claim 1 is flexible coupling, it is characterised in that the supported flange is matched somebody with somebody with the air duct interference Close.
4. blower fan according to claim 1 is flexible coupling, it is characterised in that the glass fabric is two layers;
Two layers of glass fabric is fixedly connected, and is provided with bracing ring between two layers of glass fabric;The support Circumferential direction of the circle along the air duct is set.
5. blower fan according to claim 4 is flexible coupling, it is characterised in that the bracing ring is multiple;
Bearing of trend of multiple bracing rings along the air duct is arranged at intervals.
6. blower fan according to claim 1 is flexible coupling, it is characterised in that the glass fabric is multilayer;
Glass fabric abuts successively described in multilayer.
7. blower fan according to claim 1 is flexible coupling, it is characterised in that the silica gel flange on the supported flange with dividing The multiple first through hole for wearing bolt and multiple second through holes are not provided with;
Multiple first through hole are correspondingly arranged with multiple second through holes respectively.
8. blower fan according to claim 1 is flexible coupling, it is characterised in that the air duct is in rectangular-shape;
The silica gel flange and the supported flange are rectangular, and the corner of the silica gel flange and the supported flange is equal It is provided with the first through hole and second through hole.
9. blower fan according to claim 7 is flexible coupling, it is characterised in that the air duct is cylindrical;
The silica gel flange and the supported flange are rounded.
10. a kind of blower fan, it is characterised in that be flexible coupling including the blower fan as described in claim any one of 1-9.
CN201710999168.1A 2017-10-23 2017-10-23 Blower fan is flexible coupling and blower fan Pending CN107605800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710999168.1A CN107605800A (en) 2017-10-23 2017-10-23 Blower fan is flexible coupling and blower fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710999168.1A CN107605800A (en) 2017-10-23 2017-10-23 Blower fan is flexible coupling and blower fan

Publications (1)

Publication Number Publication Date
CN107605800A true CN107605800A (en) 2018-01-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307182A (en) * 2019-07-03 2019-10-08 洛阳北玻台信风机技术有限责任公司 A kind of carbon fiber and expanding material combined type ducted fan air duct and its forming method

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Publication number Priority date Publication date Assignee Title
KR20050017636A (en) * 2003-08-08 2005-02-22 주식회사 에이브이티 pipe connector
CN201354903Y (en) * 2008-12-23 2009-12-02 镇江施达尔电气有限公司 Dust leading pipe and dust guiding pipe connecting and sealing structure
CN202432169U (en) * 2011-11-17 2012-09-12 玉锋实业集团有限公司 Novel rubber soft joint with wear-resistant sleeve
CN202756798U (en) * 2012-08-13 2013-02-27 合肥荣业新材料设备有限公司 Double tube sealing structure of furnace tube hearth
CN204042253U (en) * 2014-08-08 2014-12-24 上海通用风机股份有限公司 A kind of being flexible coupling with lining steel plate and thermal insulation layer
CN205226707U (en) * 2015-11-07 2016-05-11 北京富伟丰建筑科技有限公司 Send soft joint of wind back to
CN207470491U (en) * 2017-10-23 2018-06-08 北京海月星科技有限公司 Wind turbine is flexible coupling and wind turbine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050017636A (en) * 2003-08-08 2005-02-22 주식회사 에이브이티 pipe connector
CN201354903Y (en) * 2008-12-23 2009-12-02 镇江施达尔电气有限公司 Dust leading pipe and dust guiding pipe connecting and sealing structure
CN202432169U (en) * 2011-11-17 2012-09-12 玉锋实业集团有限公司 Novel rubber soft joint with wear-resistant sleeve
CN202756798U (en) * 2012-08-13 2013-02-27 合肥荣业新材料设备有限公司 Double tube sealing structure of furnace tube hearth
CN204042253U (en) * 2014-08-08 2014-12-24 上海通用风机股份有限公司 A kind of being flexible coupling with lining steel plate and thermal insulation layer
CN205226707U (en) * 2015-11-07 2016-05-11 北京富伟丰建筑科技有限公司 Send soft joint of wind back to
CN207470491U (en) * 2017-10-23 2018-06-08 北京海月星科技有限公司 Wind turbine is flexible coupling and wind turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307182A (en) * 2019-07-03 2019-10-08 洛阳北玻台信风机技术有限责任公司 A kind of carbon fiber and expanding material combined type ducted fan air duct and its forming method

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