Multi-bag gas-liquid linkage vibration reduction device of large coal mill base and using method of multi-bag gas-liquid linkage vibration reduction device

Abstract

The invention discloses a multi-bag gas-liquid linkage vibration reduction device of a large coal mill base and a using method of the multi-bag gas-liquid linkage vibration reduction device. Based on the technical problems that due to a small quantity of randomly-distributed large particles and blocky coal gangue in input raw coal, a grinding system is caused to generate quasi periodical strenuous vibration and noise, the quasi periodical strenuous vibration and noise are transmitted to the coal mill base, the base and a foundation are subjected to strenuous vibration at the same time, wear of a transmission chain is aggravated, the connecting state of the base and the foundation is interfered, and noise pollution is generated, the multi-bag gas-liquid linkage vibration reduction device is arranged between the foundation and the base, eight gas bags serve as a main vibration reduction unit, strenuous vibration caused by large raw coal particles, blocky coal gangue, uneven feeding and the like can be almost completely and effectively absorbed, the production efficiency of a coal mill is improved, noise pollution and wear of the transmission chain are reduced, and the service life of the whole machine is prolonged. A hydraulic jack set can provide convenience for mounting and maintenance of the gas bags of the machine, meanwhile, safety guarantees are provided for operation of the machine, and safety and reliability of use of the machine are improved.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a multi-bag gas-liquid linkage shock absorber for a base of a large coal mill and a method for using the same. Background technique [0002] At present, large-scale coal mills are widely used. When the coal mill is running, the input raw coal is allowed to contain a certain proportion of randomly distributed large particles and massive coal gangue. In addition, there is a certain allowable error in the amount of input raw coal, which makes the machine During work, they will cause the grinding system to produce periodic severe vibration and noise, which will be transmitted to the base of the coal mill, causing the base and the foundation to be subject to severe vibrations at the same time, which will aggravate the wear of the transmission chain, interfere with the connection between the base and the foundation, and generate noise. worsen the working environment. [0003] The current common met...

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Problems solved by technology

Among them, the most commonly used method is to build a special foundation for large-scale equipment. This foundation is independent of the surrounding ground and has a certain shock absorption effect. At the same time, the strength of the foundation is strengthened, so that the connection between the equipment and the foundation is relatively firm. Fundamentally solve the problem of severe vibration and noise. This method is the basic shock absorption method for heavy machinery and equipment. The basic investment will have a negative impact on the efficiency of the machine to a certain extent; the spring shock absorber is another commonly used shock absorption method in process applications. The spring shock absorber is easy to install and can be adjusted in height and level according to actual needs. Moreover, it can effectively isolate the vibration of large-scale mechanical equipment, protect and prolong its service life, and large-scale mechanical equipment and this spring shock absorber have the characteristics of large installation flexibility, good stability, and remarkable shock-isolation effect. The load it can bear is limited. In the face of hundreds or hundreds of tons of heavy machinery and equipment, even if multiple sets of spring shock absorbers work at the same time, it is difficult to bear the weight of the machine. In addition, the spring shock absorbers wear out under heavy loads. Larger, the service life of the shock absorber will be shortened, which will affect its shock absorption effect, increase the maintenance frequency of the machine, and reduce production efficiency

In addition, most current mills do not consider the shock absorption of the machine base when they are designed. Although the existing mills are installed with shock absorption measures outside the machine, this passive shock absorption method only reduces the Part of the noise transmitted from the inside to the outside of the machine has no obvious effect when applied to the mill. At the same time, it will affect the life of the foundation and the machine, reduce the working efficiency of the machine, and strong vibration will bring a lot of noise, causing noise pollution. Less than the standard of green manufacturing

[0004] In addition, when the coal mill is fed, the raw coal is often doped with many other impurities. The hardness, density, viscosity, and humidity of these impurities are different from the raw coal, which will cause the coal mill to grind coal. When the input coal particle size is uniform, the grinding state of the grinding ball and the coal particle is stable, the vibration is uniform and not violent; once the input of large block particles, it will impact and collide with the grinding ball, and with these The impact and collision cause violent vibration and huge noise of the fuselage. The vibration is transmitted from the grinding ball to the fuselage, and then from the fuselage to the base and foundation, which aggravates the wear of the foundation and also makes the gap between the foundation and the base The connection state is more unstable, which is a negative effect on the service life of the coal mill

Moreover, the most common raw coal impurities are massive raw coal and massive coal gangue, whose hardness is larger than that of the standard coal particles fed into the feed, and the size is different, and these impurities will inevitably exist in the input raw materials. The machine will not only produce severe vibration, but also affect the size and uniformity of coal injection particles, reducing the production quality

[0005] The traditional shock absorption methods of coal mills have their own advantages and disadvantages, and the problem of impurities such as coal gangue and lumpy raw coal in the raw coal of coal mills has become a common problem that cannot be solved by traditional shock absorption methods for a long time, and no significant shock absorption effect has been found so far A report on damping technology of coal mill

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