Dual Spindle Helical Pump Backlash Adjustment via Housing Opening
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Solution Overview
Problem
Current two-spindle screw pumps require complex and time-consuming maintenance procedures, particularly when adjusting the backlash of conveyor screws, as the gear and bearing sections need to be detached from the drive module, making it difficult to readjust the screws without disassembling the gearbox.
Innovation Solution
The design includes elongated holes in the fastening element allowing for rotational adjustment of the gear and fastening element relative to each other, along with an opening in the pump housing that allows access to the gear section for backlash adjustment without detaching the gear housing or drive module, enabling easier maintenance by allowing tools to reach the gear chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gear and bearing sections are detached from the drive module for backlash adjustment, then the backlash can be properly adjusted, but the maintenance time and effort increase significantly
Solution Approach 1:
The patent extracts the adjustment function from the complex disassembly process by providing a specific opening in the housing that allows access to the gear section. This enables the backlash adjustment to be performed without removing the entire gear and bearing section from the drive module, effectively separating the adjustment operation from the full disassembly procedure.
Solution Approach 2:
The opening in the housing acts as an intermediary access point that mediates between the external adjustment tools and the internal gear section. This intermediary structure allows maintenance personnel to perform backlash adjustment without fully detaching the gear and bearing section, reducing maintenance time while maintaining adjustment capability.
2Ease of repair
If the gear and bearing section are removed for maintenance, then the conveying screws and mechanical seals can be replaced, but the disassembly and reassembly process becomes more complex
Solution Approach 1:
The patent segments the housing into multiple sections with a specific opening that provides access to the gear section. This segmentation allows maintenance personnel to access and replace components like conveying screws and mechanical seals without removing the entire gear and bearing section, thereby simplifying the disassembly procedure while maintaining ease of repair.
3Ease of operation
If the opening with removable cover is provided in the housing, then access to gear section is easier for adjustment, but the housing structure becomes more complex
Solution Approach 1:
The patent incorporates an opening with a removable cover as a pre-designed feature in the housing structure. This preliminary action of providing built-in access points eliminates the need for creating additional openings or modifying the housing during maintenance operations, thereby improving ease of access while minimizing the increase in housing structure complexity.
Data Source
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AI summary
The invention relates to a twin-screw pump in a single-flow design with a pump housing comprising a pump section, a bearing section, and a gearbox section with a gearbox chamber, wherein the bearing section and the pump section are designed separately from each other. The object of the invention is to improve the aforementioned pump in such a way that maintenance and readjustment can be carried out more easily and with less time.This problem is solved by designing the bores in the fastening element in such a way that the gear and the fastening element (and thus the shaft) can be rotated relative to each other, so that the distance between the flanks of the feed screws (the backlash of the feed screws) can be adjusted, by providing an opening on the gearbox section of the pump housing, by providing the opening with a removable cover, by arranging the opening in such a way that the cover can be removed when the spindle pump is mounted, and by making the gearbox chamber accessible with the necessary tool for adjusting the backlash of the feed screws.