Structure and method for additionally installing balance block on fan coupler

Abstract

The invention provides a structure and a method for additionally installing a balance block on a fan coupler. The structure comprises a reinforcing disc and the balance block, the reinforcing disc is fixed to the coupler through bolts, and the balance block is fixed to the reinforcing disc and the coupler in a welded mode. The method comprises the steps that the reinforcing disc is machined according to the structure of the coupler, and a circular ring hollow structure on the disc is basically the same as a bolt hole of the coupler in size; the balance block is machined according to vibration data, the weight of a weight test block is estimated according to the vibration data, the radius of a rotor and the mass, and the machined balance block and the reinforcing disc are matched and welded to the corresponding position of the rotor; the angle and the weight are adjusted, counterweight is carried out, and a complete process of dynamic balance is completed; and if the vibration data still exceed the standard after the counterweight is completed, the previous steps are continuously repeated. The balance block is additionally arranged on an original coupler structure, safety is guaranteed through the two methods that the balance block and the coupler are welded and the balance block and the coupler are fixed through bolts, and the balance block is prevented from being thrown out.

Description

technical field [0001] The invention belongs to the field of coal-fired thermal power plants, and in particular relates to a structure and method for adding a balance block to a fan shaft coupling. Background technique [0002] There are many types of fans in thermal power plants: such as induced draft fans, supply fans, primary fans, sealed fans, etc. These are important equipment for thermal power plants. At present, the total power consumption of fans in power plants in my country accounts for more than 30% of the power consumption rate of power plants. Obviously, the safety, reliability and operation economy of boiler fans in thermal power plants are extremely important to the safety and economy of power plants. [0003] The most common cause of fan vibration during actual operation is dynamic imbalance, and it is necessary to install a balance block on the fan. The most common place to add the balance weight is the impeller of the fan. Not only does the fan need to be...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of long installation of balance blocks and heavy on-site workload for the existing fan of the power station, and considering the conventional structure of the fan and on-site conditions, and on the premise of reducing the on-site workload and working time as much as possible, the present invention proposes an on-site The Structure and Method of Adding Balance Weight to Fan Coupling

Images