CN-115807780-B - Low-wind-resistance, natural-frequency-adjustable air cooler fan bridge frame with TLD function

Abstract

The invention relates to an air cooler. Aims to provide an air cooler fan bridge with low wind resistance, adjustable natural frequency and TLD damping function, the fan bridge of the air cooler also has the characteristics of simple structure and convenient use. The technical scheme is that the air cooler fan bridge frame with the TLD damping function is low in wind resistance and adjustable in natural frequency, and is characterized in that the outer side faces of the middle parts of the two main beams are all guide faces which incline from top to bottom and inwards, and the two side faces of the supporting beams are all guide faces which incline from top to bottom to the vertical center line, so that air flow is guided.

Inventors

• DU XUCHAO
• CHEN QI
• LOU JIANMING
• Niu Yingchi
• BAO YUHANG
• FENG BIN
• LIU YUJUN
• DU XINHUA

Assignees

• 杭州国能汽轮工程有限公司

Dates

Publication Date

20260505

Application Date

20221205

Claims (4)

1. 1. The air cooler fan bridge with low wind resistance, adjustable natural frequency and damping function of the tuned liquid damper comprises bridge beams (10) which are horizontally arranged and are placed at the two ends of an air cooling platform, and bending-resistant reinforcing frames (20) which are standing and fixed at two sides of the bridge beam in the width direction, wherein each bridge beam comprises two main beams (1) positioned at two sides of the bridge beam in the width direction and a plurality of branch beams (2) which are transversely fixed between the two main beams and are mutually arranged in parallel, and the main beams and the branch beams are steel sections with I-shaped cross sections, wherein a plurality of reinforcing rib plates are additionally arranged at the left side and the right side of each main beam; the guide device is characterized in that the outer side surfaces of the middle parts of the two main beams are all guide surfaces which incline from top to bottom and inwards, and the two side surfaces of the supporting beams are all guide surfaces which incline from top to bottom and vertical central lines; The structure of the guide surface of the girder is formed by firstly cutting a part of the lower flange on the outer side of a long steel (1-1) adopted by the girder, cutting a part of a plurality of reinforced rib plates (4) positioned on the same side of the steel, and then welding and fixing a plurality of girder guide plates (1-2) at the middle part of the steel, wherein each girder guide plate is connected with the end parts of the upper flange and the lower flange and the cutting parts of two adjacent reinforced rib plates, so that a plurality of mutually independent closed containers are formed on the steel to contain liquid for adjusting the natural frequency of the vibration bridge through quality change; The structure of the guide surface of the supporting beam is formed by firstly cutting part of the lower flanges of two sides of a short section steel (2-1) adopted by the supporting beam, cutting part of a plurality of reinforced rib plates positioned on two sides of the section steel, and then respectively welding and fixing a plurality of supporting beam guide plates (2-2) on the left side and the right side of the section steel, wherein each supporting beam guide plate is connected with the end parts of the upper flange and the lower flange and the cutting parts of two adjacent reinforced rib plates, so that a plurality of mutually independent closed containers are formed on the I-shaped section steel to contain liquid for adjusting the natural frequency of the vibration bridge through quality change; the upper flange part of the profile steel is provided with a plurality of injection ports which are communicated with the closed container one by one and each injection port is provided with a corresponding injection sealing head, and the guide plate is provided with a plurality of discharge ports communicated with the closed container and a plurality of discharge sealing heads which are arranged for the discharge ports one by one so as to be beneficial to quantitatively adjusting the capacity of liquid in the closed container; the plurality of discharge openings are arranged along the up-down direction of the guide plate so as to facilitate the adjustment of the liquid capacity in the closed container.
2. 2. The low-wind-resistance, natural-frequency-adjustable air cooler fan bridge frame with the tuned liquid damper shock absorption function according to claim 1, wherein the length of the middle part is more than 80% of the length of the main beam.
3. 3. The low wind resistance, natural frequency adjustable air cooler fan bridge with tuning liquid damper damping function according to claim 2, wherein the setting positions of the high, middle and low three-gear discharging openings on all guide plates on the main beam are uniform in height, and the setting positions of the high, middle and low three-gear discharging openings on all guide plates on the supporting beam are also uniform in height, so that capacity adjustment is facilitated.
4. 4. The air cooler fan bridge frame with low wind resistance, adjustable natural frequency and tuning liquid damper damping function according to claim 3, wherein the injection port and the discharge port are screw holes respectively, and the matched sealing head is a bolt with a sealing ring.

Description

Low-wind-resistance, natural-frequency-adjustable air cooler fan bridge frame with TLD function Technical Field The invention relates to an air cooler, in particular to a fan bridge structure of an induced air type direct air cooling condenser, which adopts a large-diameter axial flow fan to be matched with a high-power motor. Background At present, the air cooler matched with the steam turbine of the large petroleum refining project and the garbage incineration power generation project is more and more designed by selecting and using a large-diameter fan with lower relative overall cost to be matched with a long tube bundle. The conventional air cooler adopting a large axial fan is characterized in that a fan driving system is arranged on a special fan bridge, a large-diameter fan with the diameter of more than 10 meters is usually a high-power motor with the diameter of 160KW or more and the height of generally more than 1.8 meters, and the motor is connected with a reduction gearbox at the bottom through a flange and is used for driving the fan to run in a speed reducing way through the reduction gearbox. The most frequently encountered problems of the fan driving system are vibration problems, the vibration mainly occurs in a fan bridge frame and a non-driving end (a suspension end) of a motor, the vibration mainly occurs due to resonance of the fan driving system, insufficient rigidity of the bridge frame, insufficient rigidity of a motor housing and the like, and when the situation occurs, large-scale shutdown maintenance, maintenance scheme making, construction and inspection are often needed, and the performance of the air cooler is reduced during the treatment period, so that the yield of a factory area is reduced. Therefore, in order to ensure long-term safe operation of the equipment and meet the requirements of the relevant standards, the vibration problem of the fan drive system must be solved. CN205207282U discloses a fan bridge with vibration damping function, which comprises a fan bridge body (1) and a vibration damper (2) for supporting the fan bridge body (1), wherein the main body of the vibration damper is a spring. CN205226196U discloses a rubber vibration damping pad device for an air cooling fan bridge, which utilizes good vibration damping, noise reduction and resistance energy consumption performances of rubber materials to weaken energy transmission during vibration of the fan bridge, reduce impact force of the fan bridge on an air cooling steel truss platform and avoid resonance damage to the whole direct air cooling system structure system. However, the damping measures adopted by the two schemes can only aim at the vibration of the fan bridge in the vertical direction, the improvement of the vibration at the two ends cannot ensure the vibration control of the mounting position of the reduction gearbox in the middle of the bridge, and the problems of resonance and vibration at the non-driving end of the motor cannot be solved. Disclosure of Invention The invention aims to overcome the defects in the background technology and provide the air cooler fan bridge frame with the TLD damping function, which has the characteristics of low wind resistance, adjustable natural frequency and simple structure and convenient use. The air cooler fan bridge with the TLD damping function comprises bridge beams which are horizontally arranged and two ends of which are placed on an air cooling platform, and bending-resistant reinforcing frames which are standing and fixed on two sides of the bridge beam in the width direction, wherein the bridge beams comprise two main beams positioned on two sides of the bridge beam in the width direction and a plurality of supporting beams which are transversely fixed between the two main beams and are mutually arranged in parallel; The air flow guiding device is characterized in that the outer side surfaces of the middle parts of the two main beams are all guiding surfaces which incline from top to bottom and inwards, and the two side surfaces of the supporting beams are all guiding surfaces which incline from top to bottom and vertical central lines so as to guide air flow. The structure of the guide surface of the girder is formed by firstly cutting a part of the lower flange on the outer side of long steel, cutting a part of a plurality of reinforced rib plates positioned on the same side of the steel, then welding and fixing a plurality of girder guide plates at the middle part of the steel, wherein each girder guide plate is connected with the end parts of the upper flange and the lower flange and the cutting parts of two adjacent reinforced rib plates, thereby forming a plurality of mutually independent closed containers on the steel to accommodate liquid with changeable quality, adjusting the inherent frequency of each stage of the bridge by changing the integral weight of the bridge, and weakening and absorbing vibration (LTD function) by the reciprocati