The basic structure and features of no self-priming pump seal

2019 - 10 - 30

maybe everybody is no stranger to no self-priming pump seal, or use it frequently, but to understand its basic structure is? May have work experience to construct more understanding, for newcomers may also don't know. Today let you know. The basic construction of self-priming pump is no seal is made up of six parts, respectively is the impeller, pump body, pump shaft, bearing, seal ring, stuffing box. 1, is the core part of self-priming centrifugal pump impeller, strength higher than that of its speed, on the impeller blades and play a major role, the impeller through static balancing experiments before assembly. Impeller on the inside and outside for smooth surface to reduce friction loss of water. 2, self-priming pump, pump body also calls the pump shell, it is the main body of the pump. Support fixed effect, and connected to install bearing bracket. 3, the role of pump shaft is connected by coupling and motor, the torque of the motor to the impeller, so it is a major part of the mechanical energy transfer. 4, bearing is set on the pump shaft support components of pump shaft, which has two kinds of rolling bearing and sliding bearing. Rolling bearing use butter as a lubricant oil is generally appropriate for two-thirds to three-quarters of the volume too much will be fever, too little and there was a noise and fever. Sliding bearing is using a transparent oil as lubricant, go to the oil level line. Too much oil leak to the pump shaft and floating base, too little bearing overheating and burn out cause an accident. Bearing has the highest temperature in the process of pump running at about 85 degrees generally run at 60 degrees, if high will find the reason and handle in time! 5, sealing ring, also known as minus leakage ring. Import and pump impeller shell gap between the will cause the pump to flow water by means of this gap in high low pressure area, the influence of pump water yield, lower efficiency. Clearance starts to cause the impeller and pump casing friction wear. In order to increase the flow resistance reducing internal leakage and delay the service life of the impeller and the pump shell, the pump casing and impeller around the foreign aid junction with sealing ring, sealing gap in a 0. 25 ~ 1. It is advisable to 10 mm. 6, stuffing box is mainly composed of filler, seal ring, packing, packing gland, water tubes. The role of the stuffing box is mainly in order to close the gap between pump casing and water pump shaft, don't let the flow within the pump does not flow outside to not let outside air into the pump. Always keeping the vacuum inside the pump. No self-priming pump is sealed by the six parts, each part has play a different role, the sealing performance of self-priming pump, quality has a certain impact. No self-priming water pump seal structure, which can be more smoothly operation equipment, if failure, can from the above several parts out.

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