Helical impeller high-rotation-speed Roots blower

Abstract

The invention provides a spiral impeller high rotation speed Roots blower, which comprises a casing, a wall plate, an oil tank and a high speed variable frequency motor, the casing is fixedly connected with the oil tank through the wall plate, a driving shaft and a driven shaft are symmetrically arranged in the casing, and the driving shaft comprises a left bearing section, a middle shaft section, an oil seal section, a right bearing section and a gear section. A left tensioning section is arranged between the left bearing section and the middle shaft section, knurls are arranged on the outer surface of the left tensioning section, a right tensioning section is arranged between the middle shaft section and the oil seal section, knurls are arranged on the outer surface of the right tensioning section, and a V-shaped groove is formed between the right tensioning section and the oil seal section. The impeller of the blower adopts a four-blade spiral design; meanwhile, the impeller is made of aluminum alloy, so that the Roots blower runs more safely in a high-rotating-speed state; the characteristic that the aluminum alloy impeller cannot generate electric sparks is utilized, and the sealing assembly is adopted for sealing to prevent gas from overflowing, so that the Roots blower has the anti-explosion characteristic in a high-rotating-speed state.

Description

technical field [0001] The invention relates to the technical field of blowers, in particular to a high-speed Roots blower with a helical impeller. Background technique [0002] Roots blower is a positive displacement gas blower, which is widely used in more and more special fields because of its simple structure, convenient use and maintenance, and forced exhaust. Traditional Roots blower impellers are generally made of gray cast iron, ductile iron, stainless steel and other materials. The rotor part of the impeller is heavy and noisy. Restricted by the maximum linear speed of the impeller material (for example, the HT250 material impeller generally has a linear speed of 30m / s), the speed of the blower cannot be too high, so that the flow rate of the blower cannot meet the needs of customers; at the same time, when the Roots blower rotates at a high speed, the impeller hole and shaft There needs to be a large friction torque between the gear hole and the shaft to ensure th...

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the technical problem that the traditional Roots blower is restricted by the maximum linear velocity of the impeller material, so that the flow rate of the blower cannot meet the requirements of use, and that there is a need for relatively high speed between the impeller hole and the shaft, and between the gear hole and the shaft at high speeds. To solve the technical problem of large friction torque, a high-speed Roots blower with spiral impeller is provided. In order to meet the high speed requirements of the Roots blower, the blower reduces the weight and noise of the impeller and increases the speed of the impeller. The impeller adopts a 4-blade spiral design; at the same time The material of the impeller is designed to be aluminum alloy to reduce the weight of the impeller, and the driving shaft and driven shaft are designed with knurling, relying on the interference generated by the knurled part of the impeller shaft to ensure that the driving shaft, driven shaft and impeller, gear The fit is firmer, making the operation of the Roots blower safer at high speeds

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