水泵工题库（Water pump problem bank）.docVIP

水泵工题库（Water pump problem bank） Water pump problem bank Fill in the blanks 1, gear pump is the pump body two gear meshing and separation, resulting in changes in volume and delivery of liquid rotary pump. 2, screw pump is to rely on the screw meshing with each other to change the volume of space to transport liquid. 3, if the gear pump suction and discharge caliber same, suction and discharge outlet can be common; if not the same, large caliber for suction port, small caliber for row exit, the two can not be common. 4, submersible pump should be used in standing in the water, water depth of not less than 0.75 meters. 5, when the screw pump meshing, the gap between the teeth and the root is 0.14 - 0.33 mm. 6, gear pump structure: driving gear, driven gear, pump body, pump cover, safety valve, bearings, seals and so on. 7, reciprocating pump working process, including inhalation and discharge of two processes. 8, gear pump gear end and end cover of the total axial clearance should be 0.05 - 0.10 mm. 9, according to the principle of the pump, the pump can be divided into the following three categories: vane pump, volume pump, and other types of pumps, centrifugal pump belongs to: vane pump. 10, according to the impeller of the water situation, can be divided into: single suction pump and double suction pump. 11, according to the operating requirements of the centrifugal pump, starting pump order are: first open the feed valve, and then start the pump, etc., after the pump runs smoothly, and then slowly open the discharge valve. 12. The machines that pump, pump, and increase fluid pressure are usually called pumps. 13, general centrifugal pump maximum suction height of about 6~8m. 14, according to the operation, should always adjust the packing gland tightness. Packing sealing water drop should be 30~60 drops per minute as well. 15, when the pump changes the packing, each adjacent packing interface should be stagger more than 90. Fill the outermost packing opening shall