multi-stage high-pressure water pump of a centrifugal type

摘要

The present invention not only prevents abrasion to the maximum while facilitating the fixing of the multi-stage impeller with low cost and simple structure, and does not require re-precision processing even if worn, and furthermore, effectively ensures the sealing, flow loss and hydraulic pressure. It provides a centrifugal multistage high pressure water pump that can greatly reduce losses and improve pump performance.;The centrifugal multistage high pressure water supply pump precisely adjusts the gap between the impellers 21 and the pumping guide member 25 and / or the sealing plate 23, and pumping guide member against rotation of the motor shaft 11a. An elastic bushing 22 made of a synthetic resin is inserted into the motor shaft 11a between the rear plates 21a of the impellers 21 so as to securely hold the 25, and between the rear plates 21a of the impellers 21. The pumping induction member 25 and the sealing plate 23 in order to maximize the airtight between the pumping guide member 25 and the sealing plate 23 and the impeller 21 and to minimize the rotational resistance by maintaining the interval of the optimum Pressurize and fix the elastic bushing 22 to optimally adjust the clearance between the pump and the impeller 21 and to secure the maximum airtightness while minimizing the rotational resistance between the pumping guide member 25 and the elastic bushing 22. It is characterized in that the fixing means (11b, 11c) to be installed on the motor shaft (11a).