Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Optimal design method for draught fan bridge of air cooling system in thermal power station

An optimized design, air-cooling system technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as excessive vibration and exceed standards, and achieve the effect of improving service life and reducing potential safety hazards.

Inactive Publication Date: 2010-02-24
BEIJING LONGYUAN COOLING TECH
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of excessive vibration in the design of the current fan bridge, reduce a series of potential safety hazards caused by the excessive vibration of the fan bridge during the working process, and improve the service life of the fan and other equipment in the air cooling system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimal design method for draught fan bridge of air cooling system in thermal power station
  • Optimal design method for draught fan bridge of air cooling system in thermal power station
  • Optimal design method for draught fan bridge of air cooling system in thermal power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment is a reconstruction method provided for the reconstruction of the bridge frame of the wind turbine whose vibration has exceeded the standard, and the purpose is how to eliminate the problem of excessive vibration in the design stage of the bridge frame.

[0035] By actually measuring the relationship between the vibration amplitude of the main beam of the wind turbine bridge in the vertical direction and the natural frequency of the wind turbine bridge vibration, as shown in image 3 As shown, the speed of the fan is set to several definite values ​​between 60% and 100% and then measured. When the fan is running at 100% speed, the natural frequency of the vibration of the fan bridge is displayed as 8.16Hz. After calculation, the current The product of the fan speed (1.632Hz) and the fan blades (5 pieces) is exactly 8.16Hz, and the vibration frequency of the fan bridge is just equal to the frequency of the blade frequency disturbance. Therefore, during th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of air cooling system, particularly to an optimal design method for a draught fan bridge of an air cooling system in a thermal power station. The optimal design method comprises the steps of confirming a blade interference frequency and a vibration fixed-frequency of the draught fan bridge and ensuring the vibration fixed-frequency of the draught fan bridge being 25% higher than the blade interference frequency by rebuilding the draught fan bridge, for the purpose of avoiding the resonance phenomenon occurring on the draught fan bridge and loweringthe vibration fixed-frequency of the draught fan bridge during the working process of the air cooling system. Compared with the draught fan bridge of the prior art which has an over-standard vibrationfixed-frequency, the draught fan bridge improved by using the optimal design method of the invention can greatly lower the vibration fixed-frequency of the draught fan bridge, for avoiding the potential safety hazards caused by the over-vibration of the draught fan bridge and prolonging the service life of the devices in the air cooling system.

Description

technical field [0001] The invention relates to the technical field of large-scale air-cooling systems, in particular to an optimal design method for fan bridges of the air-cooling system of a thermal power station. Background technique [0002] The air-cooling island of a direct air-cooling power station is usually composed of dozens or even hundreds of air-cooling units. The fan bridge span of each air-cooling unit is more than 10m, and it is installed on a 30-50m high steel structure support platform to support the fan and maintenance access. And so on. like figure 1 and 2 As shown, in the process of operation, the rotation of the fan produces a dynamic disturbance force perpendicular to the rotation plane of the fan, which is the main cause of the vibration of the fan bridge. According to a large number of on-site measurement results, the direct air cooling system operating in the power station generally has the problem of excessive vibration of the fan bridge. Exces...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F04D29/00F04D29/66
Inventor 彭继业郭铁能董兆一曹大光李海方蔚棠
Owner BEIJING LONGYUAN COOLING TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com