Reverse-Rotation Hydraulic Pump for Pressure Differential Compensation
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Solution Overview
Problem
Existing hydraulic systems fail to effectively compensate for pressure differentials between the system and the target system, leading to inefficiencies in fluid delivery and actuation.
Innovation Solution
A hydraulic-mechatronic system with a hydraulic pump that can rotate in both forward and reverse directions, coupled with a relief valve that adjusts its position based on pump direction, to manage pressure differentials by directing fluid flow into or out of the reservoir, thereby controlling fluid delivery to the target system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pump rotates in a fixed direction to provide pressurized fluid, then fluid delivery is maintained, but the system cannot compensate for pressure differentials between the system and target system
Solution Approach 1:
The pump's rotational direction is made dynamic rather than fixed. The system transitions from a static single-direction pump to a dynamic bi-directional pump that can rotate forward to deliver fluid and backward to compensate for pressure differentials, enabling adaptability without adding complex external compensation mechanisms
Solution Approach 2:
The pump is designed to perform multiple functions: forward rotation for fluid delivery to the target system and reverse rotation for pressure differential compensation. This multi-functionality eliminates the need for separate compensation devices, resolving the contradiction between adaptability and device complexity
2Reliability
If the relief valve remains inactive during pump operation, then fluid delivery to the target system is maintained, but pressure buildup cannot be controlled when delivering to a pressurized system
Solution Approach 1:
The relief valve operates with feedback control based on system pressure conditions and pump rotation direction. When the pump rotates in reverse, the relief valve activates to manage pressure buildup by directing fluid back to the reservoir, creating a feedback mechanism that automatically responds to pressure differentials without complex external control systems
Solution Approach 2:
The relief valve transitions from a static inactive state to a dynamic controllable state. The valve's position is dynamically adjusted based on pump rotation direction and system pressure requirements, enabling reliable pressure control while integrating seamlessly with the bi-directional pump operation
3Productivity
If fluid is continuously delivered to the target system, then productivity is maintained, but pressure differentials cause inefficiencies in fluid delivery and actuation
Solution Approach 1:
The system employs periodic action by alternating between forward pump rotation for fluid delivery and reverse pump rotation for pressure compensation. This periodic switching optimizes fluid delivery efficiency by preventing energy losses from continuous delivery against pressure differentials, resolving the contradiction between productivity and energy efficiency
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 system efficiently manages pressure differentials, ensuring stable fluid delivery and actuation by reversing the pump direction to activate or deactivate the relief valve, enhancing system performance and responsiveness.
Implementation Method 1
a hydraulic pump having an inlet and an outlet, the inlet for receiving input fluid from the fluid reservoir and the outlet for providing pressurized fluid to the communication port
Implementation Method 2
at least one check valve for selectively providing communication between the fluid reservoir and the hydraulic pump
Implementation Method 3
a relief valve fluidly connected to the target system and the fluid reservoir. The relief valve is configured for movement between a first valve position and a second valve position. In the first valve position, the relief valve is inactive and configured to direct any fluid to the communication port. In the second valve position, the relief valve is active and configured to direct any fluid from the communication port to the fluid reservoir within the housing
Data Source
AI summary
A hydraulic-mechatronic system, for a vehicle that is connected to a target system, includes a housing with a fluid reservoir containing fluid, a communication port, a hydraulic pump, an electric motor for driving the hydraulic pump, at least one check valve, and a relief valve fluidly connected to the target system and the fluid reservoir. The relief valve moves between a first valve position, which is inactive and directs fluid to the communication port, and at least a second valve position, which is active and directs fluid from the communication port to the fluid reservoir. The hydraulic pump may rotate in forward and reverse directions. During operation of the hydraulic pump in the reverse direction, the relief valve is active such that the hydraulic-mechatronic system limits delivery of fluid through the communication port and instead directs fluid flow into the fluid reservoir of the housing.