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Self-fixing stator housing

一种定子、弹性体定子的技术，应用在旋转活塞式泵、旋转活塞式机械、机器/发动机等方向，能够解决适用性不尽人意等问题，达到减轻重量、改善联接、节省材料的效果

Inactive Publication Date: 2015-01-07
NETZSCH PUMPEN & SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known solutions of the above type are still not satisfactory in terms of applicability

Method used

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  • Self-fixing stator housing

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] figure 1 The stator ( 2 ) of an eccentric screw pump ( 4 ) is shown, which is surrounded on its circumference by shell-shaped housing sections ( 6 ) of equal size, which form the stator housing ( 8 ). According to the embodiment of the invention, the housing segments ( 6 ) are arranged on the outer side of the elastomer stator inner part ( 9 ). The stator inner part consists of a gel-like material with elastic properties, while the stator outer cover (8) is made of metallic material. The end face of the elastomer stator inner part (9) has a projection in the form of a flange (10), to which the stator housing (8) is connected on the end face, wherein the stator housing (8) is axially Retained between the flanges (10) and preloaded due to the elastic nature of the stator inner (9).

[0039] The stator housing (8) is also provided with a structural element (12) extending radially from its outer side, which surrounds the stator housing (8) in the form of ribs or webs. Fo...

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PUM

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Abstract

Stator casing (8) of an eccentric screw pump (4) having an elastomeric stator inner part (9) containing a plurality of shell-like casing segments (6), and production method for a stator casing of this kind, with which the expenditure on servicing work can be reduced. To this end, according to the invention, casing segments (6) which are adjacent in the longitudinal direction of the stator casing (8) are arranged around the longitudinal axis of the stator casing (8) such that they are offset in relation to one another, wherein each casing segment (6) has connecting means (18) and at least four casing segments (6) are in engagement with one another and form a composite. In order to produce the stator casing (8), an axial force component is applied to the casing segments (6) by clamping, wherein the casing segments (6) engage with one another, as a result of which a radial force component is generated and the composite is formed.

Description

technical field [0001] The invention relates to a stator housing of an eccentric screw pump having an elastomer stator inner part, which comprises a plurality of shell-shaped housing segments. The invention also relates to a housing segment for such a stator housing and to a production method for the stator. Background technique [0002] Eccentric screw pumps consist essentially of a helical rotor mounted rotatably in a stator, which rotor rotates eccentrically with its longitudinal axis about the stator axis. The side of the stator close to the rotor has a double-pitch double-row helical shape corresponding to the profile of the rotor. In this case, the inner space of the stator in cross-section forms a rectangular surface with two semicircular surfaces adjoining on opposite sides, the diameter of which corresponds to the diameter of the rotor profile. A plurality of cavities of equal size are formed between the rotor and the stator, in which the product is moved axially ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/107
CPCF04C2/1075F04C2230/60Y10T29/49242
Inventor C·宾迪格F·格茨
Owner NETZSCH PUMPEN & SYST
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