CN202768499U - Vibration isolation structure of cooling tower draught fan - Google Patents
Vibration isolation structure of cooling tower draught fan Download PDFInfo
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- CN202768499U CN202768499U CN 201220460946 CN201220460946U CN202768499U CN 202768499 U CN202768499 U CN 202768499U CN 201220460946 CN201220460946 CN 201220460946 CN 201220460946 U CN201220460946 U CN 201220460946U CN 202768499 U CN202768499 U CN 202768499U
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- cooling tower
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Abstract
Disclosed is a vibration isolation structure of a cooling tower draught fan. The vibration isolation structure is arranged between a draught fan supporting steel component and a blow dryer supporting structure. The vibration isolation structure is composed of an upper bearing component, a pressure-bearing spring vibration isolator, a tension spring vibration isolator, a damping limiting stopper, and a lower bearing plate. The pressure-bearing spring vibration isolator and the tension spring vibration isolator are installed between the upper bearing component and the lower bearing plate. The damping limiting stopper is installed on the lower bearing plate and near the upper bearing component. The upper bearing component is fixedly connected with the draught fan supporting steel component through a bolt. The lower bearing plate is fixedly connected with the blow dryer supporting structure through a bolt. According to the installing method of the cooling tower draught fan supporting steel component, each cooling tower draught fan can be provided with a plurality of the vibration isolation structures. Therefore the demand of structure balance of the vibration isolation structure can be satisfied, not only can the draught fan vibration be effectively isolated, but also cost is low and transforming construction period is short.
Description
Technical field
The utility model relates to a kind of Control Technique of Vibration and Noise, especially prevents the technology that blower fan of cooling tower structural vibration solid is propagated.
Background technique
Cooling tower is widely used in industrial production and the commercial field as exchange heat equipment.In recent years, along with the construction of a large amount of tall buildings in city, mechanical floor is often as the position that cooling tower is set in the attic of tall building, annex and the floor.The vibration of cooling tower when operation has the blower fan system vibration, the vibration of ventilating, and the blade that main vibration source is blower fan system impacts air and produces vibration, machine operation vibration.Wherein placing axial-flow blower when work blade of cat head to impact air, to produce influence of vibration maximum.The vibration noise transmission way of blower fan system has: blade → wheel hub (motor → coupling) → speed reducer → speed reducer bearing → blower fan supporting steel member → air duct supporting structure → cooling tower body structure → each supporting foot → concrete pedestal → building structure → sensitive point for noise building structure → airborne noise, motor also are connected with blower fan supporting steel member by motor support base.Blower fan system vibration meeting enters in the building structure by air duct supporting structure, cooling tower body structure, building structure with the form of elastic wave.Usually structural element, its natural reonant frequency scope are generally below 100Hz, and to belong to the self-excited vibration dominant frequency very approaching with the vibration of blower fan system, then very easily excites structural element resonance.The low-frequency vibration of blower fan system velocity of wave in building structure is high, and vibration attenuation is little, and through the structure radiation, vibration changes air-borne sound into, and sensitive point for noise is exerted an influence.Because low frequency, ultralow frequency sound wave are close with the human organ frequency, the room noise value is lower than 35dB (A) still might affect normal study, work, rest and sleep.
In existing cooling tower Noise and Vibration Control, often take to arrange the mode of cooling tower isolation mount, before cooling tower was installed, mounting spring vibration damper between cooling tower each supporting foot of bottom and pedestal can completely cut off blower fan of cooling tower influence of vibration effectively.But reality is the impact of cooling tower running generation vibration interference often, just proposes the cooling tower vibration control.At this moment, because cooling tower body structure member etc. has all been installed, each supporting foot and pedestal be firm welding, considers that again the existence of mounting spring vibration damper much is difficult to the pipeline modification of the difficulty, particularly inlet and outlet system that overcome.Carry out the cooling tower vibration control this moment, the high transformation of cost is long in time limit, can affect the normal operation of cooling tower equipment.
Summary of the invention
In order to overcome the deficiency that can exert an influence to cooling tower body structure member to the vibration control transformation in the cooling tower running, the utility model provides a kind of blower fan of cooling tower vibration insulation structure, this blower fan of cooling tower vibration insulation structure not only completely cuts off fan vibration effectively, and cost is low, the transformation duration is short, and normal operation exerts an influence to cooling tower equipment basically.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of blower fan of cooling tower vibration insulation structure, be arranged between blower fan supporting steel member and the air duct supporting structure, formed by upper support member, pressure-bearing spring vibration isolation device, draught spring vibration isolator, damping snubber and lower support plate; Pressure-bearing spring vibration isolation device, draught spring vibration isolator are installed between upper support member and the lower support plate, the damping snubber be installed on the lower support plate with the upper support member by.The upper support member uses bolt to be fixedly connected with blower fan supporting steel member, and lower support plate uses bolt to be fixedly connected with the air duct supporting structure, and upper support member, lower support plate horizontal parallel arrange.Upper support member, lower support plate arrange along the air duct frame, and width is consistent, and lower support plate length is given and stayed damping snubber mounting point greater than upper support member length.The upper support member is comprised of L-type steel plate and two side steel plates.The damping snubber is comprised of load-carrying member, elastic damping piece, fixing bolt, the integrated steel structure that load-carrying member is formed by U-shaped steel plate and bottom steel plate.The elastic damping piece is installed in the outside of upper support member two side steel plates, and the U-shaped steel plate is Spielpassung between shape and the elastic damping piece profile in the U-shaped steel plate outside the elastic damping piece, and the bottom steel plate is installed on the lower support plate.Elastic damping piece and float that normality leaves certain slit between the vibration insulation structure can prevent low-frequency vibration by the transmission of damping snubber, produces the low-frequency vibration short circuit.At the blower fan supporting steel member of cooling tower and the binding site of air duct supporting structure the blower fan of cooling tower vibration insulation structure is set all, according to the installation method of blower fan of cooling tower supporting steel member, the vibration insulation structure of each blower fan of cooling tower can be a plurality of.
Blower fan system produces when the blower fan hinge impacts air and reverses damping torque when the starting up, can progressively increase the opposite direction load force that the blower fan support produces downwards and hinge is rotated, and during blower fan stable operation, this load force tends towards stability.But when shutting down, blower fan system is in the speed reducing rotation process at blower fan system, reverses damping torque and can produce opposition, when excited frequency moves closer to the natural frequency of blower fan system, produces resonance, and amplitude will increase.Because the deadweight of blower fan system is less, can produce thus blower fan system and be subjected to force unbalance to cause rocking, cause damage to blower fan system and with the binding site of air duct supporting structure.For this reason, take following measure: consist of blower fan system vertical load power control mechanism, the maximum vertical load force during the common vertical pretightening force that forms of pressure-bearing spring vibration isolation device and draught spring vibration isolator should be gone through the motions greater than the blower fan system operation by the pressure-bearing spring vibration isolation device of bearing pressure in the blower fan system running and vibration isolation and the vibration isolation balance component that formed by the draught spring vibration isolator that bears control blower fan system opposite force.The damping snubber that vibration isolation balance component two limits arrange consists of the blower fan system level to the control mechanism of load force, with the level of restriction blower fan system and vibration insulation structure to displacement.
The beneficial effects of the utility model are: by at cooling tower fan system vibration insulation structure being set, mainly completely cut off the Vibration propagation between blower fan system and cooling tower structure.Between blower fan supporting steel member and the air duct supporting structure blower fan of cooling tower vibration insulation structure is set, not only effectively completely cut off fan vibration, and cost is low, the transformation duration is short.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model blower fan of cooling tower vibration insulation structure embodiment's the sectional structural map of facing.
Fig. 2 is the sectional structural map of overlooking of Fig. 1.
Fig. 3 is the side-looking sectional structural map of Fig. 1.
Fig. 4 is the utility model blower fan of cooling tower vibration insulation structure embodiment's the installation diagram of overlooking.
1. blower fan vibration insulation structures among the figure, 2. blower fan supporting steel member, 3. air duct supporting structure, 4. upper support member, 5. pressure-bearing spring vibration isolation device, 6. draught spring vibration isolator, 7. damping snubber, 8. lower support plate, 9. bolt, 10.L shape steel plate, 11. steel plate, 12. load-carrying members, 13. elastic damping pieces, 14.U the shape steel plate, 15. bottom steel plates.
Embodiment
In Fig. 1,1, among the embodiment shown in 2,3,4, a kind of blower fan of cooling tower vibration insulation structure (1), be arranged between blower fan supporting steel member (2) and the air duct supporting structure (3), formed by upper support member (4), pressure-bearing spring vibration isolation (5) device, draught spring vibration isolator (6), damping snubber (7) and lower support plate (8); Pressure-bearing spring vibration isolation device (5), draught spring vibration isolator (6) are installed between upper support member (4) and the lower support plate (8), and damping snubber (7) is installed in lower support plate (8) upward and upper support member (4) side.Upper support member (4) uses bolt (9) to be fixedly connected with blower fan supporting steel member (2), and lower support plate (8) uses bolt (9) to be fixedly connected with upper support member (4), lower support plate (8) horizontal parallel setting with air duct supporting structure (3).Upper support member (4), lower support plate (8) arrange along the air duct frame, and width is consistent, and lower support plate (4) length is given and stayed damping snubber (7) mounting point greater than upper support member (4) length.Upper support member (4) is comprised of L-type steel plate (10) and two side steel plates (11).Damping snubber (7) is comprised of load-carrying member (12), elastic damping piece (13), fixing bolt (9); The integrated steel structure that load-carrying member (12) is formed by U-shaped steel plate (14) and bottom steel plate (15).Elastic damping piece (13) is installed in the outside of upper support member (4) two side steel plates (11), U-shaped steel plate (14) is outside elastic damping piece (13), be Spielpassung between the interior shape of U-shaped steel plate (14) and elastic damping piece (13) profile, bottom steel plate (15) is installed on the lower support plate (8).
Should be appreciated that within not breaking away from scope of the present utility model, can make multiple change to above-described embodiment.All any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. a blower fan of cooling tower vibration insulation structure is arranged between blower fan supporting steel member and the air duct supporting structure, it is characterized in that: be comprised of upper support member, pressure-bearing spring vibration isolation device, draught spring vibration isolator, damping snubber and lower support plate; Pressure-bearing spring vibration isolation device, draught spring vibration isolator are installed between upper support member and the lower support plate, the damping snubber be installed on the lower support plate with the upper support member by.
2. blower fan of cooling tower vibration insulation structure according to claim 1, it is characterized in that: the upper support member uses bolt to be fixedly connected with blower fan supporting steel member, lower support plate uses bolt to be fixedly connected with the air duct supporting structure, and upper support member, lower support plate horizontal parallel arrange.
3. blower fan of cooling tower vibration insulation structure according to claim 3 is characterized in that: upper support member, lower support plate arrange along the air duct frame, and width is consistent, and lower support plate length is given and stayed damping snubber mounting point greater than upper support member length.
4. blower fan of cooling tower vibration insulation structure according to claim 4, it is characterized in that: the upper support member is comprised of L-type steel plate and two side steel plates.
5. blower fan of cooling tower vibration insulation structure according to claim 4, it is characterized in that: the damping snubber is comprised of load-carrying member, elastic damping piece, fixing bolt, the integrated steel structure that load-carrying member is formed by U-shaped steel plate and bottom steel plate.
6. blower fan of cooling tower vibration insulation structure according to claim 1, it is characterized in that: the elastic damping piece is installed in the outside of upper support member two side steel plates, the U-shaped steel plate is outside the elastic damping piece, be Spielpassung between shape and the elastic damping piece profile in the U-shaped steel plate, the bottom steel plate is installed on the lower support plate.
7. blower fan of cooling tower vibration insulation structure according to claim 1, it is characterized in that: according to the installation method of blower fan of cooling tower supporting steel member, the vibration insulation structure of each blower fan of cooling tower can be a plurality of.
8. blower fan of cooling tower vibration insulation structure according to claim 2 is characterized in that: the maximum vertical load force during the common vertical pretightening force that forms of pressure-bearing spring vibration isolation device and draught spring vibration isolator should be gone through the motions greater than the blower fan system operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220460946 CN202768499U (en) | 2012-09-12 | 2012-09-12 | Vibration isolation structure of cooling tower draught fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220460946 CN202768499U (en) | 2012-09-12 | 2012-09-12 | Vibration isolation structure of cooling tower draught fan |
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| Publication Number | Publication Date |
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| CN202768499U true CN202768499U (en) | 2013-03-06 |
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| CN 201220460946 Expired - Fee Related CN202768499U (en) | 2012-09-12 | 2012-09-12 | Vibration isolation structure of cooling tower draught fan |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470537A (en) * | 2013-10-09 | 2013-12-25 | 广新海事重工股份有限公司 | Damping and noise reduction device of fan |
| CN103603829A (en) * | 2012-09-12 | 2014-02-26 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure for cooling tower fan |
| CN103711733A (en) * | 2013-12-11 | 2014-04-09 | 上虞专用风机有限公司 | Shock absorber for nuclear power fan |
| CN108180618A (en) * | 2018-02-08 | 2018-06-19 | 珠海格力电器股份有限公司 | Vibration damping device and air conditioning equipment |
| CN108386391A (en) * | 2018-04-27 | 2018-08-10 | 格力电器（合肥）有限公司 | Fan protection device and air conditioning unit |
| CN108443208A (en) * | 2018-05-11 | 2018-08-24 | 约翰斯顿流体科技（无锡）有限公司 | A kind of horizontal normal temperature type single-stage, single suction corrosion-resistant stainless steel centrifugal pump |
| CN108759505A (en) * | 2018-04-27 | 2018-11-06 | 重庆工程职业技术学院 | Vibrating isolation system used for cooling tower |
| CN109795945A (en) * | 2018-12-24 | 2019-05-24 | 中国电建集团山东电力建设第一工程有限公司 | A kind of combined hanging method of spring vibration-isolator and steel structure platform |
| CN111396680A (en) * | 2020-03-19 | 2020-07-10 | 上海核工程研究设计院有限公司 | Vibration isolation support of nuclear power station |
-
2012
- 2012-09-12 CN CN 201220460946 patent/CN202768499U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603829A (en) * | 2012-09-12 | 2014-02-26 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure for cooling tower fan |
| CN103603829B (en) * | 2012-09-12 | 2016-05-11 | 厦门嘉达声学技术有限公司 | Blower fan of cooling tower vibration insulation structure |
| CN103470537A (en) * | 2013-10-09 | 2013-12-25 | 广新海事重工股份有限公司 | Damping and noise reduction device of fan |
| CN103711733A (en) * | 2013-12-11 | 2014-04-09 | 上虞专用风机有限公司 | Shock absorber for nuclear power fan |
| CN103711733B (en) * | 2013-12-11 | 2016-03-30 | 浙江上风高科专风实业有限公司 | A kind of shock absorber for nuclear power fan |
| CN108180618A (en) * | 2018-02-08 | 2018-06-19 | 珠海格力电器股份有限公司 | Vibration damping device and air conditioning equipment |
| CN108386391A (en) * | 2018-04-27 | 2018-08-10 | 格力电器（合肥）有限公司 | Fan protection device and air conditioning unit |
| CN108759505A (en) * | 2018-04-27 | 2018-11-06 | 重庆工程职业技术学院 | Vibrating isolation system used for cooling tower |
| CN108386391B (en) * | 2018-04-27 | 2024-06-07 | 格力电器（合肥）有限公司 | Fan protection device and air conditioning unit |
| CN108443208A (en) * | 2018-05-11 | 2018-08-24 | 约翰斯顿流体科技（无锡）有限公司 | A kind of horizontal normal temperature type single-stage, single suction corrosion-resistant stainless steel centrifugal pump |
| CN109795945A (en) * | 2018-12-24 | 2019-05-24 | 中国电建集团山东电力建设第一工程有限公司 | A kind of combined hanging method of spring vibration-isolator and steel structure platform |
| CN109795945B (en) * | 2018-12-24 | 2020-09-01 | 中国电建集团山东电力建设第一工程有限公司 | Combined hoisting method for spring vibration isolator and steel structure platform |
| CN111396680A (en) * | 2020-03-19 | 2020-07-10 | 上海核工程研究设计院有限公司 | Vibration isolation support of nuclear power station |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20160912 |
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| CF01 | Termination of patent right due to non-payment of annual fee |