Piston Pump Hydraulic Stabilization via U-Shaped Bracket
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Solution Overview
Problem
Existing piston pumps for high-pressure cleaning appliances have complex and costly clamping mechanisms that complicate production and assembly, requiring significant mechanical stability while minimizing production costs.
Innovation Solution
A piston pump design featuring a single U-shaped clamping bracket oriented symmetrically to the longitudinal axis, with a central piston-like insert part in a pressure chamber surrounded by sealing elements, allowing hydraulic ram action to counteract piston forces and torques, reducing the need for elaborate clamping elements and enabling cost-effective production and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an elaborate clamping element with multiple bridges and support flanges is used to clamp the pump head to the pump block, then the mechanical stability of the piston pump is improved, but the production costs and device complexity increase
Solution Approach 1:
The invention extracts the stabilizing function from the complex clamping element structure and relocates it to the pressure chamber. The pressure chamber, formed by the pump head and pump block, provides mechanical stability through hydraulic pressure rather than through elaborate mechanical clamping structures. This separates the clamping function from the stabilizing function, allowing a simpler clamping element to be used while maintaining stability through the pressure chamber's hydraulic action.
Solution Approach 2:
The invention applies hydraulic principles by using the pressurized liquid in the pressure chamber to generate stabilizing forces. The pressure chamber receives pressurized liquid from the pump chambers and uses this hydraulic pressure to counteract forces and torques on the pump block, replacing the need for complex mechanical stabilization structures in the clamping element.
2Stability of the object's composition
If a rigid connecting part with through-bore is used to connect two U-shaped clamping brackets, then the mechanical stability is improved, but the assembly complexity and production costs increase
Solution Approach 1:
The invention removes the rigid connecting part from the clamping element design. Instead of using two U-shaped brackets connected by a rigid structure, the patent employs a single U-shaped clamping bracket that leverages the pressure chamber's hydraulic action for stabilization. This extraction of the connecting part simplifies both manufacturing and assembly processes while maintaining mechanical stability through the pressure chamber.
Solution Approach 2:
The pressure chamber serves the dual function of pressurizing the liquid for discharge and providing mechanical stability to the pump block. By using the pressurized liquid itself to stabilize the structure, the system becomes self-servicing, eliminating the need for separate rigid connecting structures in the clamping element and simplifying the overall design.
3Stability of the object's composition
If surface-to-surface contact between the support flange and pump head step is ensured during assembly, then the mechanical stability is improved, but the assembly precision requirements and time increase
Solution Approach 1:
The invention extracts the stabilizing contact function from the support flange interface and relocates it to the pressure chamber. Instead of relying on precise surface-to-surface contact between the support flange and pump head step, the patent uses the pressure chamber's hydraulic action to provide stabilization. This eliminates the need for high-precision assembly at the support flange interface, reducing assembly time and precision requirements.
Solution Approach 2:
The invention replaces the mechanical surface-to-surface contact stabilization mechanism with a hydraulic stabilization mechanism. The pressure chamber uses hydraulic pressure from the pressurized liquid to stabilize the pump block, substituting the need for precise mechanical contact and reducing assembly complexity and time requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves mechanical stability with reduced production costs and simplified assembly by using a single U-shaped clamping bracket, allowing for effective compensation of piston forces and torques through hydraulic ram action, while maintaining the necessary stability for high-pressure operations.
Implementation Method 1
the pressurized liquid in the pressure chamber upstream of the insert part forms a hydraulic ram which acts upon the pump block with an axially oriented force which counteracts the forces and torques exerted by the pistons on the pump block
Data Source
AI summary
A piston pump for a high-pressure cleaning appliance is provided, including a pump block having a plurality of pump chambers, into each of which one piston plunges, and including a pump head having a suction inlet and a pressure outlet, each pump chamber in flow connection via a suction valve with the suction inlet and via a pressure valve with the pressure outlet, and including a clamping bracket engaging around the pump head. The piston pump can have a single U-shaped clamping bracket oriented symmetrically in relation to the longitudinal pump axis, and the pump head and the pump block form between them downstream of the pressure valves a pressure chamber in which a central, piston-like insert part is arranged, the insert part being surrounded by a sealing element and having a passage, and a pressure line oriented coaxially with the longitudinal pump axis being arranged downstream of the passage.