Radial force load caused by belt drive
The radial force load caused by the belt drive is not considered in the design. If it is directly selected, it may cause the shaft to deform. In severe cases, the impeller may be damaged or even broken. Therefore, on the basis of structural analysis and comparison of multiple pumps in active service, it is considered to select a small flow single-stage vortex pump as the basis for the modification to meet the matching requirements of the air compressor unit. Shaft and Shaft Seal The pump is a single-stage vortex pump that is driven by a belt and driven indirectly through the pulley of the air compressor main unit. In order to withstand the large radial force of the shaft input end and prevent the shaft deformation, two bearings are arranged in series at the input end, and one bearing of the same type is arranged at the impeller end, so that the main shaft is evenly loaded and stable. . In addition, in order to withstand the above-mentioned deep sea pressure, the mechanical seal is specially designed to withstand high pressure type, and the housing end cap seal is designed to withstand high pressure. The original design is a flange that takes up a lot of space. If you add a gas-liquid separation cover for self-priming, there is no room. For this design, the flange connection is changed to a threaded connection, and the discharge chamber is specially designed to have a self-priming function and is integrally molded with the water inlet. The advantage of this method is that the inlet of the soup is very convenient to install, and Take up space and compact structure. The hydraulic calculation is determined by hydraulic calculation to determine the speed of the pump. The impeller diameter is the end surface area of ​​the flow path. The liquid flow rate in the flow path of each part of the flow path is the number of the blade and the gap value of each part. The pump shaft is the main moving part of the pump. Its comprehensive mechanical performance is very important to the service life of the pump. Because of the modified pump belt drive, the input end has a large belt tension, so the deformation of the shaft by the bending moment can not be large. Otherwise, the impeller end will hit the casing, which will cause the top of the impeller to be scratched or even broken. When calculating the deformation, consider the axial deformation caused by the initial tension of the impeller when the impeller is static. The calculation results show that the impeller end is deformed within the deformation, the deformation is small, and the impeller does not hit the casing during operation. The strength and stiffness of the calculated shaft meet the requirements. The static pressure test sealed the inlet and outlet with a cover plate and carried out a static pressure test with water pressure. No leakage was observed during the sealing and installation of the pump body, which met the design requirements. The test bench test is to check the main technical indexes such as self-priming performance pressure flow power noise of the pump to verify whether the sea water pump meets the design parameters. The test results are listed in the table except that the power is higher than the design value, and other parameters meet the design value requirements. . Durability test. Then the pump is again disassembled after running the test with the main machine. After inspection, the parts are worn out normally. After the recovery, the line continues to be put into operation. The pump is based on a prototype pump, and the solution to the system is correct according to the requirements of the host. After testing, the performance indexes of the prototype pump have reached the design requirements, especially the durability test, which shows that the pump performance and structural dimensions fully meet the requirements of the host. The pump trial system was successful, and other similar air compressors can be used together. The reinforcement design of the other pipelines and the draft tube interface is carried out according to the above formula. In the design process, the requirements of the pumping condition for the suction pipe and the stress characteristics of the suction pipe under the condition of the pump are considered. The energy recovery coefficient of the draft tube is improved as much as possible, the energy loss is reduced, and the draft tube is excellent in performance. And the reinforcement design of each nozzle can effectively avoid the safety hazard caused by the pipeline rupture caused by the unit during operation, and ensure the rigidity and strength to meet the requirements of the pump turbine under various working conditions, and Can improve the efficiency of the whole machine.
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Feature:
• Compatible with most solvents used for fixing and staining.
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