Pump Frame Nose Plate for Multiple Tie Rod Patterns
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Solution Overview
Problem
Conventional high pressure reciprocating pumps require adaptor plates for different tie rod bolt patterns, which are costly and difficult to fit, limiting compatibility and maintenance efficiency.
Innovation Solution
A pump frame design with a nose plate that accommodates multiple tie rod patterns, allowing flexible coupling of fluid ends with different arrangements, eliminating the need for adaptor plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed pattern of tie rod holes is machined into the power end frame, then the structural integrity and simplicity are maintained, but the adaptability to different fluid end technologies is reduced
Solution Approach 1:
The nose plate is designed with multiple sets of tie rod openings (first set, second set, and optionally third set) that can accommodate different fluid end tie rod patterns. This universal design allows a single power end frame to interface with various fluid end technologies without requiring adaptor plates, directly resolving the contradiction by enabling multiple functions within one structural component.
Solution Approach 2:
The nose plate is segmented with distinct opening patterns (first set of openings for first fluid end, second set of openings for second fluid end) that can be selectively used. This segmentation allows the frame to maintain structural integrity while providing specialized interfaces for different fluid end configurations, resolving the adaptability-complexity contradiction.
2Adaptability or versatility
If adaptor plates are designed and installed to adapt to other bolt patterns, then compatibility with different fluid ends is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Multiple tie rod opening patterns that would traditionally require separate adaptor plates are merged directly into the nose plate structure. This integration eliminates the need for additional adaptor plate components, reducing manufacturing steps, material costs, and assembly complexity while maintaining compatibility with different fluid ends.
Solution Approach 2:
The nose plate serves multiple functions by incorporating different tie rod opening patterns directly, replacing the need for specialised adaptor plates. This universal design approach reduces manufacturing complexity and cost while achieving the same adaptability goal.
3Adaptability or versatility
If the nose plate area and thickness are increased to accommodate multiple tie rod patterns, then adaptability to various fluid end technologies is improved, but the weight and material usage increase
Solution Approach 1:
Instead of increasing nose plate thickness uniformly, the solution utilizes the planar area of the nose plate by arranging multiple sets of openings in different spatial configurations (first set, second set, third set at different locations). This dimensional approach accommodates multiple tie rod patterns without requiring excessive material thickness, thus managing weight while maintaining adaptability.
Solution Approach 2:
The nose plate is designed with localized reinforcement and strategically positioned openings rather than uniform thickening. Each opening set is positioned to provide local structural support where needed, allowing the nose plate to accommodate multiple tie rod patterns while minimizing overall material usage and weight.
Data Source
AI summary
Mounting a fluid end to a power end of a reciprocating pump involves the use of couplers, such as tie rods. A pump frame is structured so that multiple fluid end tie rod patterns can be machined into the nose plate of the power end of the pump. In one embodiment, not all patterns need to exist at the same time, and additional tie rod patterns can be added at a later time for retrofit to other patterns of tie rods.