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Lobe pump rotor

A technology of rotor and arc segment, applied in the field of rotor profile of Roots pump, can solve the problems of ignoring one and the other, rotor profile interference, etc., and achieve the effect of reducing the area, reducing the probability of rotor profile interference, and reducing the regurgitation rate.

Active Publication Date: 2014-01-01
伯仲(山东)工业设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of corner points, in the process of synchronous meshing of a pair of rotors, multi-point meshing will occur simultaneously within a period of time (such as Figure 4 Among them, the meshing point is the center point, the upper and lower ends, and the upper and lower corners), which seems to increase the resistance to the airflow between the two rotors, but due to errors in machining and assembly, multi-point meshing will lose sight of the other, so Will cause rotor profile interference

Method used

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Embodiment Construction

[0026] Embodiments of the present invention are further described below in conjunction with accompanying drawings:

[0027] Such as figure 1 , figure 2 and Figure 5 , Figure 6 As shown, the Roots pump rotor includes a body 1, which is a two-leaf type. The shape line of the body 1 is in a rectangular coordinate system with the horizontal centerline of the cross-section of the body as the X-axis and the vertical centerline as the Y-axis. The axis is symmetrical up and down, and the left and right are symmetrical along the Y axis. The first quadrant of the Cartesian coordinate system includes the first arc segment 2, the conjugate curve segment 3, the involute segment 4, the second arc segment 5, and the second arc segment. The three arc segments 6, the first arc segment 2, the conjugate curve segment 3, the involute segment 4, the second arc segment 5, and the third arc segment 6 are smoothly connected. The pitch circle radius of the body is R, which is half of the dista...

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Abstract

The invention relates to a lobe pump, and in particular relates to a lobe pump rotor. The lobe pump rotor comprises a body, wherein the body is of two-leaf-type, body molded lines comprise a first circular arc segment, a conjugate curve segment, an involute segment, a second circular arc segment and a third circular arc segment which are arranged in sequence, and the first circular arc segment, the conjugate curve segment, the involute segment, the second circular arc segment and the third circular arc segment are in smooth connection. According to the lobe pump rotor, by arranging the involute segment and the second circular arc segment, meshing points are greatly reduced, so that the interference probability of the rotor molded lines is greatly reduced, the rotor cannot be stuck, and processing and assembly are easier.

Description

technical field [0001] The invention relates to a Roots pump rotor, in particular to a Roots pump rotor profile. Background technique [0002] Most existing Roots pump rotors adopt arc-cycloid-involute rotor profiles, such as image 3 Among them, the TV segment is an arc with O as the center and the radius is Rm, the ET segment is an involute with the base circle radius r, the CE segment is a cycloid, and the SC segment is O as the center, with (2R-Rm) as Radius arc, this type of line is not a smooth curve, there are corner points, such as image 3 Point T in . During the vertical meshing process of a pair of rotors, the conjugate relationship is as follows: Figure 4 As shown, S1C1 arc is conjugate to V2T2 arc; C1E1 cycloid is conjugate to T2 point; E1T1 involute is conjugate to T2E2 involute; T1 point is conjugate to E2C2 cycloid; T1V1 arc is conjugate to C2S2 arc conjugate. Due to the existence of corner points, in the process of synchronous meshing of a pair of rotors...

Claims

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Application Information

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IPC IPC(8): F04C29/00F04C18/14
Inventor 张东庆陈宗武徐元蕾邱延亮
Owner 伯仲(山东)工业设备有限公司
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