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Lobe pump

A technology of rotary piston pumps and rotary pistons, which is applied in the direction of rotary piston pumps, rotary piston machines, rotary piston/swing piston pump components, etc., and can solve the problems of leaky transportation, loss, wear, etc.

Active Publication Date: 2020-10-02
BMA BRAUNSCHWEIGISCHE MASCHINBAUANSTALT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of such rotary piston pumps are the relatively small pump volume per revolution and the high wear at the rotary piston and sealing elements if the sealing elements are not forcibly guided
Here, the piston contour causes the sealing element to be pressed away from the piston and thus leads to leaks and conveying losses
In order to prevent this, increased pressing forces must be applied, which lead to increased energy requirements and increased wear

Method used

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  • Lobe pump
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Examples

Experimental program
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Effect test

Embodiment Construction

[0030] figure 1 A rotary lobe pump 1 is shown in a schematic sectional view, having a housing 10 with an upper inlet 11 and a figure 1 Exit 12 is arranged on the right. Inside the housing 10 , a rotary piston 20 is mounted rotatably about an axis of rotation 21 . A particularly viscous medium (in particular slurry during sugar production) is conveyed from the inlet 11 to the outlet 12 by means of a rotary piston 20 which has two conveying wings 22 on opposite sides. Here, the direction of rotation of the rotary piston 20 is counterclockwise, as indicated by the arrow. The rotary piston 20 with two transport wings 22 partially rolls on the cylindrical housing wall and forms a separation between the inlet side and the outlet side together with the sealing element 30 and the sealing body 42 of the shut-off wing 40 . During the rotation of the rotary piston 20 it runs on the outer contour of said rotary piston.

[0031] The sealing element 30 is supported or formed on a sealin...

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Abstract

The invention relates to a lobe pump having a) a housing (10), which has an inlet (11) and an outlet (12) for the medium to be pumped; b) at least one rotary piston (20), which is mounted driveably and rotatably in the housing (10) and which has at least two transport vanes (22) provided with a contour, which transport the medium to be conveyed from the inlet (11) to the outlet (12); c) and a sealing element (30) per rotary piston (20), which sealing element is mounted on a sealing body (42) and runs against the contour of the rotary piston (20) as the rotary piston (20) rotates and performs adeployment movement from a minimum diameter of the rotary piston (20) to a maximum diameter of the rotary piston (20) and a retraction movement from the maximum diameter of the rotary piston (20) tothe minimum diameter of the rotary piston (20) on different sides of the transport vanes (22), wherein d) the path covered by the sealing element (30) on the infeed side (221) of the transport vane (22) during the retraction movement is shorter than the path on the outfeed side (222) during the deployment movement.

Description

technical field [0001] The invention relates to a rotary lobe pump having a housing with an inlet and an outlet for the medium to be pumped, at least one rotary piston in a drivable and rotatable supported in the housing, and the at least one rotary piston has at least two profiled transport wings that transport the medium to be transported from the inlet to the outlet; and each rotary piston sealing element, which is fastened to a particularly pivotably mounted sealing body and runs on the contour of the rotary piston during rotation of the at least one rotary piston and implements a minimum movement from the at least one rotary piston An out movement of the diameter to the largest diameter of the at least one rotary piston and an inward movement from the largest diameter of the at least one rotary piston to the smallest diameter of the at least one rotary piston. Such rotary piston pumps are particularly suitable and provided for pumping highly viscous media, such as slurri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01C21/08F04C2/332F04C2/46F04C15/00
CPCF01C21/08F01C21/0809F04C2/332F04C2/46F04C15/0007F04C2240/20F04C2250/20
Inventor H-H·韦斯滕达普F·阿尔杰斯
Owner BMA BRAUNSCHWEIGISCHE MASCHINBAUANSTALT AG
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