Method for providing axial gap in cutter assembly of grinder pump, and grinder pump comprising shim configured for providing said axial gap

A technology of cutter assembly, axial clearance, applied to parts of pumping devices for elastic fluids, pump elements, water supply devices, etc.

Inactive Publication Date: 2019-08-27
XYLEM EURO GMBH
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the technical problem of improving prior art pumps is to always reproduce the operative axial spacing / clearance between cutter wheel and cutter disc when installing, and thereby eliminate the risk of incorrect installation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for providing axial gap in cutter assembly of grinder pump, and grinder pump comprising shim configured for providing said axial gap
  • Method for providing axial gap in cutter assembly of grinder pump, and grinder pump comprising shim configured for providing said axial gap
  • Method for providing axial gap in cutter assembly of grinder pump, and grinder pump comprising shim configured for providing said axial gap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The invention relates in particular to a grinding pump which is arranged for pumping waste water containing solid matter. first reference Figure 1-3 .

[0029] A grinding pump (also called a chopping pump) comprises an impeller 1 journalled and driven in rotation in a pump chamber 2 defined by a pump housing 3 . The pump housing 3 has an axial inlet port on the suction / upstream side of the pump and a radial discharge port 4 on the pressure / downstream side of the pump for liquid delivery by the rotating impeller 1 during operation. The pump comprises a cutter wheel, indicated generally at 5, arranged coaxially with and co-rotating with the impeller 1 . In operation, the cutter wheel 5 rotates on the upstream side of a cutter disc (generally indicated at 6 ) which can be fixedly connected to the pump housing 3 . More precisely, the cutter disc 6 is fitted in covering relation to a central access opening 7 formed through a suction plate 8 which can be fixedly connected...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for providing an axial gap in a cutter assembly of a grinder pump in order to secure an operative shearing action at a shearing interface in said cutter assembly. Theinvention also relates to a grinder pump comprising a cutter wheel (5) connected to and driven in rotation by a drive shaft (16), the cutter wheel (5) comprising a set of cutting edges (13), and a cutter disc (6) stationary connected to a pump housing (3) and having a central hole (24) and a set of cutting holes (12), the drive shaft (16) and the cutter wheel (5) being interconnected via said central hole (24) of the cutter disc (6),wherein the cutter wheel (5) and the cutter disc (6) constitute said cutter assembly. The grinder pump is characterized in that a shim (27), that has a thicknessequal to or greater than 0,05 millimeters and equal to or less than 0,15 millimeters and that is manufactured from degradable paper or plastic material, is clamped between the cutter wheel (5) and thecutter disc (6), wherein the grinder pump further comprises a locking member (26) acting against the cutter wheel (5) and the drive shaft (16) and fixating the axial gap between the cutter wheel (5)and the cutter disc (6) provided by said shim (27), wherein the set of cutting holes (12) of the cutter disc (6) are located radially outside an imaginary circle that is concentric with an axial center axis of the grinder pump and that has a fourth diameter (D4),an outer diameter (Do) of the shim (27) being lesser than said fourth diameter (D4)of the imaginary circle of the cutter disc (6).

Description

technical field [0001] The present invention generally relates to the field of pumps arranged for pumping liquids containing solid matter. Furthermore, the invention relates to the field of grinding pumps for pumping slurries such as wastewater. More specifically, the present invention relates to a method for providing axial clearance in the cutter assembly of such a grinding pump in order to ensure operational shearing action at the shear interface in said cutter assembly. The cutter assembly includes a cutter wheel and a cutter disc, wherein a shear interface is located between the cutter wheel and the cutter disc. According to the idea of ​​the invention, thin shims are used in the grinding pump to provide axial clearance in the cutter assembly to ensure operational shearing action at the shear interface in said cutter assembly of the grinding pump. Thus shims and lapping pumps are interrelated products of the same inventive concept that need to work together in order to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F04D7/04F04D29/62B02C18/00B02C18/18F04D29/22F04D29/20F04D29/70
CPCB02C18/0092B02C18/18F04D7/045F04D29/20F04D29/2288F04D29/622B02C18/00F04D7/04B02C2201/063E03C1/2665
Inventor J·贝克卡
Owner XYLEM EURO GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap