Why Must Keep the Generator End Cover Air-Tight?

The rotor and stator of the steam turbine generator are fixed together through the end cover, and there are many pipes, valves, gaskets, etc. connected with the generator inside the end cover. If the end cover is not well sealed, it will lead to the leakage of internal lubricating oil and cooling water, and even cause fire or explosion hazards. In addition, external dust, moisture and corrosive substances entering the generator will also cause damage to the equipment.

Therefore, it is very important to ensure the sealing of the end cover for the generator. Generally, the end cover of the sealed steam turbine generator is made of high-strength metal materials and sealing gaskets to ensure the sealing effect between the end cover and the casing. The main significance of sealing the end cover of steam turbine generator is to prevent the leakage of lubricating oil and cooling water inside the generator, and to prevent dust, water, corrosive substances, etc. from entering the generator, so as to ensure the normal operation and service life of the generator.

How to Seal The Generator?

It is more reliable to use sealant to seal the generator end cover. It needs professional sealing materials and coating technology to apply sealant to fill the tiny gap between the end cover and the housing to form a seal.

The generator end cover slot sealant HDJ-892 is used to seal the slot or groove on the generator end cover to ensure that no gas, liquid and dust will enter, as well as to prevent corrosion, pollution and damage to the machine parts and insulating materials, and thus protect the normal operation of the generator. It has the characteristics of high temperature resistance, good weather resistance, strong water resistance, good chemical corrosion resistance and no flowing.

The use method of HDJ-892 sealing:

Preparation: clean the notch to remove dirt and moisture. If necessary, sand the notch to remove the residue.

Application: Apply sealant to the groove surface with brush, roller or spray gun and other coating tools. If it is necessary to apply sealant on the groove bottom or side wall, special coating tool or needle barrel shall be used.

Curing: After the sealant is applied, it needs to wait for a certain time to cure naturally. The specific curing time shall be determined according to the performance parameters and environmental conditions of the sealant.

Completion: After the sealant is cured, check the sealing effect and carry out necessary cleaning work.

How to check the sealing effect of generator end cover?

The sealing effect of generator end cover can be judged by the following methods:

1. Visual inspection method: check whether there is oil stain or water stain at the interface between the end cover and the shell. If there are obvious signs of leakage, there is a problem with the end cover seal.

2. Sound inspection method: listen to the noise of the generator during operation. If the noise becomes larger or abnormal sound is found, it may be caused by poor sealing of the end cover.

3. Thermal detection method: measure the temperature change of the end cover when the generator is running. If the temperature of the end cover is too high, it may be caused by poor sealing of the end cover.

To sum up, it is necessary to comprehensively consider the above factors and carry out necessary inspection and maintenance to judge whether the generator end cover is well sealed. In actual operation, it is also necessary to regularly check and maintain the end cover seal to ensure its normal operation.