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

Active Publication Date: 2020-11-06
SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the rotors seen so far, 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 factor is 1.4639, but there are certain defects: 1. The contact between the rotor top and the pump casing is a line contact in the width direction, and the radial leakage is large; Balance and reduce vibration failure

Method used

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

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] Such as Figure 1 to Figure 3 As shown, a pump rotor of the present invention with a combination of splayed crest and involute profile is referred to as an innovative rotor, and a common involute rotor is referred to as an ordinary rotor; where the intersection point of the peak axis and the pitch circle is referred to as the peak node ;The end point 2 of the peak concentric fan arc is referred to as the fan point; the central angle σ of the peak concentric fan arc is referred to as the fan angle; point 1 is the peak point; point 5 is the valley point, and the end point 3 of the involute arc segment is the involute The starting point of the involute line, the end point 4 of the involute arc segment is the end point of the involute line, and...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/12
Inventor 李玉龙
Owner SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
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