Hydraulic Pressure Amplifier Valve Layout for Low-Oscillation Operation
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Solution Overview
Problem
Existing hydraulic pressure amplifier arrangements are complex and prone to vibrations, leading to noise issues.
Innovation Solution
A hydraulic pressure amplifier arrangement that eliminates the need for a sequence valve, using a control valve with a pilot and inlet pressure area, where the valve element is automatically positioned to short circuit the low pressure cylinder and intermediate space with the tank port, and only activates the intensifier section when higher pressure is required, minimizing fluid displacement and oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sequence valve is used to activate the intensifier section, then the pressure amplifier arrangement can function, but the device becomes complicated and prone to vibrations causing noise
Solution Approach 1:
The patent removes the sequence valve from the system entirely. The control valve is redesigned with a pilot pressure area that directly responds to supply pressure, eliminating the need for separate sequence valve components and their associated vibrations and noise.
Solution Approach 2:
The patent combines the functions of the sequence valve and control valve into a single integrated control valve structure. The pilot pressure area and inlet pressure area are integrated into one valve body, reducing component count and eliminating the harmful vibrations caused by separate valve operations.
2Device complexity
If the control valve uses equal pressure areas for pilot and inlet, then the structure is simplified, but the valve element cannot be actuated by pressure alone
Solution Approach 1:
The patent creates an asymmetric pressure area configuration where the pilot pressure area is deliberately made larger than the inlet pressure area. This asymmetry generates a net force on the valve element when supply pressure increases, enabling automatic actuation without additional mechanisms while maintaining structural simplicity.
3Productivity
If the low pressure cylinder and intermediate space are connected to supply port, then fluid displacement increases causing pressure oscillations, but the intensifier section needs activation
Solution Approach 1:
The patent pre-configures the control valve so that the low pressure cylinder and intermediate space are initially connected to the tank port rather than the supply port. This preliminary positioning prevents fluid displacement and pressure oscillations before intensifier activation is needed. When activation is required, the valve element moves to connect these spaces to the supply port through the pilot pressure mechanism.
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 achieves improved vibrational behavior and reduces noise by minimizing fluid displacement and oscillations, allowing for high-frequency operation without unwanted pressure oscillations, while being cost-effective with fewer components.
Implementation Method 1
The valve element (13) is loaded by spring means (16) into a direction towards a starting position of the control valve (12)
Implementation Method 2
a pressure on the inlet pressure area (18) acts in the same direction as a force of the spring means (16), and a pressure on the pilot pressure area (17) acts in the opposite direction
Implementation Method 3
the intensifier section is automatically activated and amplifies the pressure supplied to the supply port by a factor resulting from the ratio between the pressure areas of the low pressure piston and the high pressure piston
Data Source
Figure 1
AI summary
A hydraulic pressure amplifier arrangement (1) is described comprising a supply port (A1), a pressure outlet (A2) connected to the supply port via check valve means (3), an intensifier section (5) having a high pressure piston (6) in a high pressure cylinder (7), a low pressure piston (8) in a low pressure cylinder (9) and connected to the high pressure piston (6), and a control valve (12) controlling a pressure in the low pressure cylinder (9), wherein the control valve (12) comprises a hydraulically actuated valve element (13). Such a pressure amplifier arrangement should have a good operational behavior in a cost effective manner. To this end the control valve (12) comprises spring means 16 acting on the valve element (1) in a direction towards a starting position of the control valve.