Roots blower According to the theory of fluid mechanics, the flow process of gas will be accompanied by loss. For example, after the gas flows through the throttling device, the pressure of the gas flow will decrease accordingly, that is, they will lose the useful work of the fan. Because all this happened in the process of Roots blower conveying gas, it is a waste of fan energy.
The working point of Roots blower is the intersection of the performance curve of the blower at a certain speed and the resistance characteristic line of the pipe network.
Roots blower is a positive displacement fan, and the air volume conveyed is proportional to the number of revolutions. Two impellers suck and exhaust three times every time the three blade impeller rotates. Compared with the two blade impeller, the gas pulsation is small, the vibration is small, and the noise is low. There is always a small gap between the impeller on the two shafts of the fan and the hole surface in the elliptical housing, between the impeller end face and the front and rear end covers of the fan, as well as between the fan impellers. Driven by the synchronous gear, the air is transported from the air inlet of the fan to the exhaust side along the inner wall of the housing.
When the roots blower is actually running, it does not always stay at the design working condition point. It will change with the user's needs or changes in external conditions, that is, the roots blower is actually working under variable working conditions.
In order to make the air pressure or air volume of the fan reach a certain target value, it is necessary to manually control the roots blower or pipe network, also known as regulation.
Through effective regulation, it can not only meet the requirements of production on flow or pressure, but also maximize energy saving under the condition that the Roots blower can work stably.
The purpose of Roots blower regulation is to meet performance requirements, expand working conditions, achieve energy conservation and prevent surge.
1. Generally, the inlet air temperature of transported substances shall not exceed 40 ℃;
2. The composition of particles in the material shall not exceed 100mg/m3, and the larger size of particles shall not exceed half of the minimum working space;
3. During operation, the temperature of rolling bearing shall not be higher than 95 ℃, and the temperature of lubricating grease shall not be higher than 65 ℃;
4. The operating pressure shall not be higher than the transformer range required on the factory nameplate;
5. The clearance between the centrifugal impeller and the casing, between the centrifugal impeller and the baffle plate, between the centrifugal impeller and the centrifugal impeller of Roots blower has been adjusted in the original factory, and the clearance shall be ensured during reassembly;
6. When Roots blower operates, the oil volume of main oil tank and auxiliary oil tank must be between the two red bars of oil gauge;
7. Check whether the connection position of import and export trade has forgotten the tightening area, and whether the support plate for pipe threading is complete.
Requirements for Roots blower piping:
1. The fan pipe shall be tightly connected without air leakage, and the support shall be set at an appropriate position.
2. Pipe materials shall be able to withstand exhaust temperature and pressure. (Steel pipe shall be used as far as possible).
3. The inside of the pipeline shall be clean and free of foreign matters to prevent foreign matters from entering.
4. A one-way valve shall be installed on the pipeline to prevent the backflow high-pressure gas caused by the reversal of the fan from entering the fan and damaging the fan. Note: The check valve shall be installed on the horizontal pipe.
5. In case of parallel operation of multiple fans, gate valves shall be set on each branch pipe (when one fan is overhauled, the pipe can be stopped).
6. The pipeline shall be equipped with an emptying valve to prevent the fan from starting with load. The fan shall start with no load and then gradually close the emptying valve. In case of load operation and shutdown, the vent valve shall be opened first to confirm that the fan is not loaded, and then the fan shall be shut down.
I believe that after reading the above contents, you should also have some understanding of the operating standards of Roots blower, and I hope it will be helpful to you.
Text term label: Roots blower
Link to this article: //wuhanzhcs.com/html/news/n02/655.html
