Hydraulic Pump Flow Control for Lower Energy and Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hydraulic systems operate with constant volume flow, leading to inefficient energy use and noise due to high pressure requirements across all hydraulic functions, even when lower pressures are needed.
Innovation Solution
A procedure that dynamically adjusts the volume flow by determining partial volume flows for various valves, calculating a total volume flow, and setting a target support volume for the hydraulic pump, allowing for energy-efficient and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulic pump operates at constant speed delivering constant volume flow, then all hydraulic functions can be supplied with sufficient flow, but energy consumption increases significantly and noise levels rise
Solution Approach 1:
The patent applies dynamics by transitioning from constant speed pump operation to variable speed operation. The control unit dynamically adjusts the pump's rotational speed based on real-time demands of hydraulic functions, ensuring the pump delivers optimal flow rates only when needed, thereby reducing energy consumption while maintaining reliable hydraulic function supply.
Solution Approach 2:
The patent changes the operational parameters of the hydraulic pump by adjusting its speed variable. Instead of operating at fixed high speed, the control unit modifies the pump's rotational speed parameter according to the actual flow requirements of active hydraulic functions, reducing energy consumption while ensuring sufficient flow delivery.
2Quantity of substance
If a hydraulic pump operates at constant high speed, then sufficient volume flow is delivered to all hydraulic functions, but noise from flow increases significantly
Solution Approach 1:
The patent applies dynamics by making the pump speed variable rather than constant. The control unit continuously monitors hydraulic function demands and adjusts the pump's rotational speed dynamically, delivering sufficient volume flow only when required by active functions, thereby minimizing flow noise generated by excessive pump operation.
3Quantity of substance
If the hydraulic pump delivers constant high volume flow, then all hydraulic functions receive adequate fluid, but the drive motor consumes excessive power converting it to heat
Solution Approach 1:
The patent applies dynamics by transitioning from constant high-speed pump operation to variable speed operation. The control unit adjusts the pump's rotational speed according to the actual volume flow demands of hydraulic functions, ensuring adequate fluid delivery while minimizing unnecessary motor power consumption and reducing energy loss to heat.
Solution Approach 2:
The patent changes the operational parameters by adjusting the pump's rotational speed variable. The control unit modifies this parameter based on real-time hydraulic function demands, delivering adequate volume flow while reducing motor power consumption and minimizing energy loss to heat generation.
Data Source
Figure 1
Figure 2
AI summary
The presented invention relates to a method (100) for operating a hydraulic device (200) comprising a plurality of valves (203) for adjusting partial volume flows of hydraulic fluid through a plurality of hydraulic subsystems (201). The method (100) comprises determining (101) respective partial volume flows for several valves (203) of the plurality of valves (203), determining (103) a total volume flow based on the determined partial volume flows, determining (105) a target delivery volume to be supplied by a modulating hydraulic pump (205) for pumping the hydraulic fluid based on the determined total volume flow, and adjusting (107) the target delivery volume for the hydraulic pump (205).