Rotary Lobe Pump Segmented Housing for Wear Reduction
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Solution Overview
Problem
Rotary lobe pumps used for conveying fluid media containing solids face issues with high wear, leakage, and difficulty in maintenance due to the arrangement of inlet and outlet openings on the pump housing, as well as limited adaptability to different installation situations and sizes.
Innovation Solution
The design relocates the inlet and outlet openings to a connection housing, allowing the pump housing to be integrated into a pipeline system, enabling a compact and maintenance-friendly configuration with separate accessibility of wear parts and allowing for easy adaptation to various installation scenarios by using a single wear plate and interchangeable rotary lobes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inlet and outlet openings are arranged on the pump housing, then direct access to rotary lobes is achieved, but maintenance requires frequent disassembly of pipeline connections
Solution Approach 1:
The pump is divided into two functional housings: the pump housing containing the rotary lobes and the connection housing containing the inlet/outlet openings. This segmentation allows the pump housing to be removed and replaced without disconnecting pipeline connections from the connection housing, enabling maintenance of rotary lobes without time-consuming disassembly of pipeline connections.
Solution Approach 2:
The connection housing acts as an intermediary between the pipeline system and the pump housing. It provides stable connection points for pipelines while allowing the pump housing to be independently removed for maintenance, thus mediating between the need for stable connections and easy maintenance access.
2Volume of moving object
If pump housing is integrated into pipeline system, then compact design is achieved, but adaptability to different installation situations is limited
Solution Approach 1:
The connection housing is designed with universal connection interfaces that can accommodate different pipeline configurations and installation situations. This allows the same compact pump design to be adapted to various installation scenarios by simply changing the connection housing configuration rather than redesigning the entire pump.
3Device complexity
If wear parts are integrated into pump housing, then structural simplicity is achieved, but replacement requires complete disassembly
Solution Approach 1:
The pump housing is segmented into the pump housing proper and the connection housing, with wear parts located in the pump housing section. This allows the pump housing to be removed as a separate unit for maintenance while leaving the connection housing and pipeline connections intact, making wear parts replacement easier without requiring complete disassembly.
4Reliability
If seals are positioned to prevent leakage, then sealing reliability is improved, but wear-prone areas increase
Solution Approach 1:
The pump housing containing the seals and rotary lobes is extracted as a separate replaceable unit from the connection housing. This allows seals to be positioned effectively for preventing leakage while enabling easy replacement of the entire pump housing assembly when wear occurs, converting a maintenance problem into a simple unit replacement operation.
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a rotary piston pump (100) for conveying a fluid medium which contains solid matter, comprising an inlet opening (111) and an outlet opening (112) for the medium to be conveyed, having two rotary pistons (121, 122) which are arranged in a pump housing (140) and which have rotary piston vanes which engage into one another, wherein each of the two rotary pistons is fastened in a torsionally rigid manner to in each case one shaft (131) and can be driven by the respective shaft, and wherein the two shafts are coupled to one another by means of a gearing arranged in a gearing housing (152). The invention relates in particular to a rotary piston pump in which the inlet opening and the outlet opening are arranged on a connecting housing (151).