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Eccentric screw pump, pin hinge and method for manufacturing pin hinge

An eccentric screw pump, pin-type technology, applied to pumps, pump components, rotary piston pumps, etc., can solve problems such as frequent cleaning

Inactive Publication Date: 2017-10-27
NETZSCH PUMPEN & SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pump must be cleaned frequently

Method used

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  • Eccentric screw pump, pin hinge and method for manufacturing pin hinge
  • Eccentric screw pump, pin hinge and method for manufacturing pin hinge
  • Eccentric screw pump, pin hinge and method for manufacturing pin hinge

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Effect test

Embodiment Construction

[0026] figure 1 A schematic illustration of an eccentric screw pump 1 according to the prior art is shown. The eccentric screw pump includes a stator 3 , a rotor 4 and a drive shaft 5 . The rotor 4 is movably coupled to the drive shaft 5 via a coupling rod 6 and two pin hinges 7 . The stator 3 has a helically wound inner side 3 *. The rotor 4 is designed as a screw rotor 4 * and performs an eccentric rotational movement about the longitudinal axis L of the stator. The shaping of the rotor 4 and the stator 3 produces a sealed cavity 2 between the rotor 4 and the stator 3 , which moves axially in the conveying direction FR when the screw rotor 4 * rotates and conveys the medium.

[0027] figure 2 An eccentric screw pump 1 according to the prior art is shown (see figure 1 ) A schematic cross-sectional view of the pin hinge 7 . The pin hinge comprises a hinge head 10 which is formed by an inner hinge part 8 and an outer hinge part 9 . The inner joint part 8 and the outer j...

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PUM

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Abstract

Eccentric screw pump (1) with pin hinges (7), eccentric screw pump with stator (3), rotor (4) and drive shaft (5), wherein the coupling rod (6) passes through two pin hinges (7 ) is arranged between the rotor (4) and the drive shaft (5) in the manner of a universal joint. The pin hinge (7) accordingly comprises a joint (10), which consists of an inner joint (8) and an outer joint (9), wherein the inner joint (8) and the outer joint ( 9) Each has a diametrical hole (11, 12, 12*) through which the pin (15*) is guided. The pin (15*) is formed by a base part (16*), on the free end of which a head part (17*, 18*) of increased cross-section of the pin is correspondingly arranged and fastened. According to the invention, a sealing element (32) is arranged in the boundary region between the base part (16*) and the at least one head part (18*). A pin hinge for an eccentric screw pump and a method of making the same are also disclosed.

Description

technical field [0001] The invention relates to an eccentric screw pump, a pin hinge and a method for producing a pin hinge according to the features of the preambles of claims 1 , 7 and 11 . Background technique [0002] The invention relates to pins for pin hinges of eccentric screw pumps. Eccentric screw pumps are pumps for conveying large quantities of media, especially viscous, highly viscous and abrasive media such as slurries, liquid manure, oil and grease. In this case, the driven helical rotor rolls in the stator. The stator is a housing with a helically wound inner side. For this purpose, the rotor performs an eccentric rotational movement about the stator axis via its profile axis. The outer screw, ie the stator, has the shape of a double thread, while the rotor screw has only a single thread. The rotor is usually made of a highly wear-resistant material, such as steel. Instead, the stator is made of elastic material, such as rubber. Through the special shap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/107F04C15/00
CPCF04C15/0061F04C2/1073F04C2240/805
Inventor R·但可M·格罗思
Owner NETZSCH PUMPEN & SYST