Pump rotor with splayed top and involute combination profile

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: 2019-05-21
SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
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  • 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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  • Pump rotor with splayed top and involute combination profile
  • Pump rotor with splayed top and involute combination profile
  • Pump rotor with splayed top and involute combination profile

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Embodiment Construction

[0019] 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.

[0020] 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 fan arc is referred to as the fan point for short; the central angle of the concentric fan arc segment σ Referred to as the fan angle; point 1 is the peak point; point 5 is the valley point, the end point 3 of the involute arc is the starting point of the involute, the end point 4 of the involute arc is the end point of the involute, and the number of leaves of the rotor is N .

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Abstract

The invention discloses a pump rotor with a splayed top and involute combination profile. The half-leaf theoretical profile consists of four parts, that is a peak concentric fan arc section, a peak weight reduction arc section, an involute arc section and a valley avoidance arc section, wherein the four parts are connected end to end. A maximum shape coefficient of the pump rotor is effectively improved compared with that of a common rotor, and the more number of blades of the rotor, the more obvious the synergism is; the peak weight reduction arc section enables the center of gravity of the blades to shift to the valley, so that the alleviating of dynamic imbalance of a rotor system and reducing of vibration faults are facilitated; the splayed top of the peak concentric fan arc section enables radial leakage to be lower; and the valley avoidance arc section can simplify the processing of the valley avoidance arc section part of the rotor, so that the so-called air-tight phenomenon that two positions are conjugate at the same time is avoided.

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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IPC IPC(8): F04C18/12
Inventor 李玉龙
Owner SICHUAN WUHUAN PETROCHEM EQUIP CO LTD
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