A pump rotor with a combination profile of splayed top and involute

An involute and combined technology, applied in the direction of pumps, rotary piston pumps, rotary piston machines, etc., can solve unfavorable rotor system dynamic unbalance vibration faults, rotor blade mass deviation at the peak, large maximum shape coefficient, etc. problems, to achieve the effect of improved shape factor, simplified processing, and low radial leakage
CN109779903BActive Publication Date: 2020-11-06SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
Publication Date
2020-11-06

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Abstract

The invention discloses a pump rotor with a combination profile of a splayed crest and an involute. The theoretical profile of the half blade consists of a concentric fan arc section at the peak, a weight-reducing circular arc section at the peak, an involute arc section and a valley. The part avoidance arc section is composed of four parts connected end to end. Compared with the ordinary rotor, the maximum shape factor of the pump rotor of the present invention is effectively improved, and the more the number of rotor blades, the more obvious the synergistic effect; Unbalance and reduce vibration faults; the splayed top of the concentric fan arc section of the peak leads to lower radial leakage; the valley avoids the arc section to simplify the processing of this part of the rotor and avoid the so-called air-trap phenomenon where two positions are conjugated at the same time.
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Description

technical field

[0001] The invention belongs to the technical field of involute rotors for Roots pumps, and in particular relates to a pump rotor with a splayed crown and an involute combined profile. Background technique

[0002] Roots pump is a rotary positive displacement pump. Its working principle is similar to gear pump. It has the characteristics of simple principle, small size, light weight, low cost, good sealing performance and no pollution. It is widely used in medium transportation, vacuum pumping, drum pumping, etc. wind etc.

[0003] The shape factor of the rotor directly determines the medium output of the pump, and the pursuit of a larger shape factor is an eternal theme of its design. Among the rotors seen at present, the involute rotor is more common, and its maximum shape coefficient is also very large, and the processing method of the involute is quite mature. The maximum shape coefficient of the rotor with 2 lobes is 1.6177, and the maximum The shape f...

Claims

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