Integrated Hydraulic Pump Cylinder for Compact Valve Drive
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Solution Overview
Problem
Existing hydraulic axes for valve drives in gas and steam turbine systems are bulky and require significant space and weight, limiting their compactness and efficiency.
Innovation Solution
A compact hydraulic axis with a synchronous differential-type double-rod cylinder integrated pump, where the pump is housed within the cylinder, eliminating the need for a separate pump housing and allowing for efficient energy use and reduced component count, optimized for space and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional separate pump and cylinder components are used, then the system is easier to manufacture and maintain, but the overall weight and installation space increase significantly
Solution Approach 1:
The patent combines the pump and cylinder into a single integrated unit where the pump is mounted directly on the cylinder housing. This merging of previously separate components reduces the overall installation space and weight while maintaining the functional independence of each component for ease of manufacture and maintenance
Solution Approach 2:
The cylinder housing serves multiple functions: it contains the cylinder mechanism and simultaneously provides mounting structure for the pump. This multi-functionality reduces the need for separate housings and supports, thereby reducing installation space without compromising manufacturability
2Length of moving object
If a differential-type double-rod cylinder is used, then the axial length is reduced, but the structural complexity increases
Solution Approach 1:
The differential-type double-rod cylinder employs asymmetric rod lengths where one piston rod is longer than the other, allowing the piston to be positioned off-center. This asymmetric design reduces the overall axial length of the cylinder while the standardized asymmetric configuration keeps structural complexity manageable
3Device complexity
If pump is integrated into cylinder cavity, then housing and piping components are eliminated, but manufacturing and assembly difficulty increases
Solution Approach 1:
The integrated unit is designed with modular segmentation where the pump can be mounted as a separate module on the cylinder housing. This segmentation allows the pump and cylinder to be manufactured independently using standard processes, then assembled together, reducing overall component count while maintaining ease of manufacture through modular assembly
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
This design enables a self-sufficient, space-efficient valve drive with minimal flow loss and deflection, combining the advantages of electric and hydraulic drives, and reduces the number of components needed, enhancing performance and installation efficiency.
Implementation Method 1
The pump (40) can be used to convey a pressure medium from the first cylinder chamber (28) into the second cylinder chamber (30), in order to actuate the piston (14) with the piston rod (20) axially
Data Source
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AI summary
The invention relates to a compact hydraulic spindle having a cylinder. Inside said cylinder, a pump for controlling the cylinder is mounted. The pump is provided in a cavity of the cylinder. The cylinder is designed as a differential-type double rod cylinder.