CN103603829B - Blower fan of cooling tower vibration insulation structure - Google Patents
Blower fan of cooling tower vibration insulation structure Download PDFInfo
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- CN103603829B CN103603829B CN201210334000.6A CN201210334000A CN103603829B CN 103603829 B CN103603829 B CN 103603829B CN 201210334000 A CN201210334000 A CN 201210334000A CN 103603829 B CN103603829 B CN 103603829B
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Abstract
A kind of blower fan of cooling tower vibration insulation structure, is arranged between blower fan supporting steel member and air duct supporting construction. Vibration insulation structure is made up of upper support member, pressure-bearing spring vibration isolation device, tension spring vibration isolator, damping stop and lower support plate. Pressure-bearing spring vibration isolation device, tension spring vibration isolator are arranged between upper support member and lower support plate, damping stop be arranged in lower support plate with upper support member by. Upper support member uses bolt to be fixedly connected with blower fan supporting steel member, and lower support plate is used bolt to be fixedly connected with air duct supporting construction. According to the installation method of blower fan of cooling tower supporting steel member, the symmetrical installation of each blower fan of cooling tower two and above vibration insulation structure. Can meet the requirement of vibration insulation structure constitutional balance, can not only effectively completely cut off fan vibration, and cost is low, the transformation duration is short.
Description
Technical field
The present invention relates to a kind of Control Technique of Vibration and Noise, especially prevent the technology that blower fan of cooling tower structural vibration solid is propagated.
Background technology
Cooling tower, as exchange heat equipment, is widely used in industrial production and commercial field. In recent years, along with the construction of a large amount of skyscrapers in city, in the attic of skyscraper, annex and floor, mechanical floor is often as the position that cooling tower is set. The vibration of cooling tower in the time of operation has 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. The axial flow blower when work blade that is wherein placed in tower top impacts air and produces vibration effect maximum. The vibration noise pipeline of blower fan system has: blade → wheel hub (motor → shaft coupling) → reductor → reductor bearing → blower fan supporting steel member → air duct supporting construction → cooling tower body construction → each feet → concrete pedestal → building structure → sensitive point for noise building structure → airborne noise, motor is also connected with blower fan supporting steel member by motor support base. Blower fan system vibration meeting enters in building structure by air duct supporting construction, cooling tower body construction, building structure with the form of elastic wave. Conventionally building element, its natural reonant frequency scope is generally below 100Hz, and to belong to self-excited vibration dominant frequency very approaching with the vibration of blower fan system, very easily excites building 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 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 human organ frequency, room noise value lower than the still likely normal study of impact, work of 35dB (A), have a 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 is installed, mounting spring shock absorber between the cooling tower each feet in bottom and pedestal, can completely cut off blower fan of cooling tower vibration effect effectively. But the reality impact that cooling tower running produces vibration interference often, just proposes cooling tower vibration control. Now, because cooling tower body construction member etc. has all been installed, each feet and pedestal firm welding, then consider that mounting spring shock absorber exists the pipeline modification that is much difficult to the difficulty, particularly inlet and outlet system that overcome. Now carry out cooling tower vibration control, the high transformation of cost is long in time limit, can affect cooling tower equipment and normally work.
Summary of the invention
In order to overcome, the vibration control in cooling tower running is transformed to the deficiency that can exert an influence to cooling tower body construction member, the invention 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, to cooling tower equipment, normal work does not exert an influence substantially.
The technical solution adopted for the present invention to solve the technical problems is: a kind of blower fan of cooling tower vibration insulation structure, be arranged between blower fan supporting steel member and air duct supporting construction, formed by upper support member, pressure-bearing spring vibration isolation device, tension spring vibration isolator, damping stop and lower support plate; Pressure-bearing spring vibration isolation device, tension spring vibration isolator are arranged between upper support member and lower support plate, damping stop be arranged in lower support plate with upper support member by. Tension spring vibration isolator is positioned at lower support plate middle part, two limit successives are installed pressure-bearing spring vibration isolation device, damping stop.
Upper support member uses bolt to be fixedly connected with blower fan supporting steel member, and lower support plate is used bolt to be fixedly connected with air duct supporting construction, and upper support member, lower support plate horizontal parallel arrange. Upper support member, lower support plate arrange along air duct frame, and width is consistent, and lower support plate length is greater than upper support member length, reserved damping stop installation site. Upper support member is made up of L-type steel plate and two side steel plates. Damping stop is made up of load-carrying member, elastic damping piece, set bolt, the integrated steel structure that load-carrying member is formed by U-shaped steel plate and bottom steel plate. Elastic damping piece is arranged on the outside of upper support member two side steel plates, and U-shaped steel plate, outside elastic damping piece, is matched in clearance between shape and elastic damping piece profile in U-shaped steel plate, and bottom steel plate is arranged in lower support plate. Elastic damping piece and the normality between vibration insulation structure of floating leave certain gap, can prevent that low-frequency vibration from transmitting by damping stop, produce low-frequency vibration short circuit. At the blower fan supporting steel member of cooling tower and the binding site of air duct supporting construction, blower fan of cooling tower vibration insulation structure is all set, according to the installation method of blower fan of cooling tower supporting steel member, the symmetrical installation of each blower fan of cooling tower two and above vibration insulation structure.
Blower fan system, in the time of starting up, produces and reverses damping torque when blower fan hinge impacts air, can progressively increase the rightabout load force that blower fan support produces downwards and hinge is rotated, and when blower fan stable operation, this load force tends towards stability. But in the time shutting down, blower fan system, in speed reducing rotation process, reverses damping torque and can produce opposition, in the time that excited frequency moves closer to the intrinsic frequency of blower fan system, produces resonance at blower fan system, amplitude will increase. Because the deadweight of blower fan system is less, can produce thus blower fan system and be subject to force unbalance to cause rocking, cause damage to blower fan system and with the binding site of air duct supporting construction. For this reason, take following measure: by bearing the pressure-bearing spring vibration isolation device of pressure in blower fan system running and vibration isolation and controlling the vibration isolation balance component that the tension spring vibration isolator of blower fan system opposite force form and form blower fan system vertical load power controlling organization by bearing, the common vertical pretightning force forming of pressure-bearing spring vibration isolation device and tension spring vibration isolator should be greater than the maximum vertical load force of blower fan system operation in going through the motions. The damping stop that vibration isolation balance component two limits arrange forms the blower fan system level controlling organization to load force, with the level that restricts blower fan system and vibration insulation structure to displacement.
The invention has the beneficial effects as follows,By vibration insulation structure being set at cooling tower fan system, the mainly Vibration propagation between isolated blower fan system and cooling tower structure. Between blower fan supporting steel member and air duct supporting construction, 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.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the sectional structural map of facing of blower fan of cooling tower vibration insulation structure embodiment of the present invention.
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 installation diagram of overlooking of blower fan of cooling tower vibration insulation structure embodiment of the present invention.
1. blower fan vibration insulation structures in figure, 2. blower fan supporting steel member, 3. air duct supporting construction, 4. upper support member, 5. pressure-bearing spring vibration isolation device, 6. tension spring vibration isolator, 7. damping stop, 8. lower support plate, 9. bolt, 10.L shape steel plate, 11. steel plates, 12. load-carrying members, 13. elastic damping pieces, 14.U shape steel plate, 15. bottom steel plates.
Detailed description of the invention
In Fig. 1,1, in 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 air duct supporting construction (3), formed by upper support member (4), pressure-bearing spring vibration isolation (5) device, tension spring vibration isolator (6), damping stop (7) and lower support plate (8); Pressure-bearing spring vibration isolation device (5), tension spring vibration isolator (6) are arranged between upper support member (4) and lower support plate (8), and damping stop (7) is arranged on lower support plate (8) above 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) is used bolt (9) to be fixedly connected with air duct supporting construction (3), upper support member (4), lower support plate (8) horizontal parallel setting. Upper support member (4), lower support plate (8) arrange along air duct frame, and width is consistent, and lower support plate (4) length is greater than upper support member (4) length, reserved damping stop (7) installation site. Upper support member (4) is made up of L-type steel plate (10) and two side steel plates (11). Damping stop (7) is made up of load-carrying member (12), elastic damping piece (13), set 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 arranged on the outside of upper support member (4) two side steel plates (11), U-shaped steel plate (14) is outside elastic damping piece (13), between the interior shape of U-shaped steel plate (14) and elastic damping piece (13) profile, be matched in clearance, bottom steel plate (15) is arranged in lower support plate (8).
Should be appreciated that in not departing from the scope of the present invention, can make multiple change to above-described embodiment. All any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a blower fan of cooling tower vibration insulation structure, is arranged between blower fan supporting steel member and air duct supporting construction, it is characterized in that: be made up of upper support member, pressure-bearing spring vibration isolation device, tension spring vibration isolator, damping stop and lower support plate; Pressure-bearing spring vibration isolation device, tension spring vibration isolator are arranged between upper support member and lower support plate, damping stop be arranged in lower support plate with upper support member by; Tension spring vibration isolator is positioned at lower support plate middle part, two limit successives are installed pressure-bearing spring vibration isolation device, damping stop; Upper support member, lower support plate arrange along air duct frame, and width is consistent, and lower support plate length is greater than upper support member length, reserved damping stop installation site; Damping stop is made up of load-carrying member, elastic damping piece, set bolt, the integrated steel structure that load-carrying member is formed by U-shaped steel plate and bottom steel plate; Elastic damping piece is arranged on the outside of upper support member two side steel plates, and U-shaped steel plate, outside elastic damping piece, is matched in clearance between shape and elastic damping piece profile in U-shaped steel plate, and bottom steel plate is arranged in lower support plate.
2. blower fan of cooling tower vibration insulation structure according to claim 1, it is characterized in that: upper support member uses bolt to be fixedly connected with blower fan supporting steel member, lower support plate is used bolt to be fixedly connected with air duct supporting construction, and upper support member, lower support plate horizontal parallel arrange.
3. blower fan of cooling tower vibration insulation structure according to claim 1, is characterized in that: upper support member is made up of L-type steel plate and two side steel plates.
4. blower fan of cooling tower vibration insulation structure according to claim 1, is characterized in that: according to the installation method of blower fan of cooling tower supporting steel member, and the symmetrical installation of each blower fan of cooling tower two and above vibration insulation structure.
5. blower fan of cooling tower vibration insulation structure according to claim 1, is characterized in that: the common vertical pretightning force forming of pressure-bearing spring vibration isolation device and tension spring vibration isolator should be greater than the maximum vertical load force in blower fan system running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334000.6A CN103603829B (en) | 2012-09-12 | 2012-09-12 | Blower fan of cooling tower vibration insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334000.6A CN103603829B (en) | 2012-09-12 | 2012-09-12 | Blower fan of cooling tower vibration insulation structure |
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| Publication Number | Publication Date |
|---|---|
| CN103603829A CN103603829A (en) | 2014-02-26 |
| CN103603829B true CN103603829B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210334000.6A Active CN103603829B (en) | 2012-09-12 | 2012-09-12 | Blower fan of cooling tower vibration insulation structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5208730A (en) * | 1991-06-27 | 1993-05-04 | Compaq Computer Corporation | Computer cooling fan vibration isolation apparatus |
| CN2154945Y (en) * | 1993-01-20 | 1994-02-02 | 上海船用柴油机研究所 | Low structural noise driving gear of diesel-electric set |
| CN102518916A (en) * | 2012-01-04 | 2012-06-27 | 厦门嘉达环保建造工程有限公司 | Equipment vibration isolation substrate |
| CN202768499U (en) * | 2012-09-12 | 2013-03-06 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure of cooling tower draught fan |
-
2012
- 2012-09-12 CN CN201210334000.6A patent/CN103603829B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5208730A (en) * | 1991-06-27 | 1993-05-04 | Compaq Computer Corporation | Computer cooling fan vibration isolation apparatus |
| CN2154945Y (en) * | 1993-01-20 | 1994-02-02 | 上海船用柴油机研究所 | Low structural noise driving gear of diesel-electric set |
| CN102518916A (en) * | 2012-01-04 | 2012-06-27 | 厦门嘉达环保建造工程有限公司 | Equipment vibration isolation substrate |
| CN202768499U (en) * | 2012-09-12 | 2013-03-06 | 厦门嘉达环保建造工程有限公司 | Vibration isolation structure of cooling tower draught fan |
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| Publication number | Publication date |
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| CN103603829A (en) | 2014-02-26 |
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Effective date of registration: 20160113 Address after: Siming District Tian CuO road Xiamen City, Fujian province 361000 No. 136 two Applicant after: Xiamen Jiada of Acoustic Technology Engineering Co., Ltd. Address before: Siming District Tian CuO road Xiamen City, Fujian province 361009 136 number one Applicant before: Xiamen Jiada Green Construction Engineering Co., Ltd. |
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