variable volume vane pump
Summary
Variable displacement vane pumps are designed to adjust the volume of fluid delivered based on the system’s requirements. These pumps have a rotor with vanes that slide radially within a cam ring, allowing adjustment of the cam ring’s eccentricity to control the displacement. Key features across various patents include mechanisms that optimize fluid flow efficiency and improve seal integrity. For instance, some designs employ pivotable cam rings and regulating pistons to maintain fluid regulation, reducing noise and cavitation. Additionally, designs focus on balancing pressure within the pump to enhance performance without excessive leakage, ensuring that the seal and pressure zones are optimized for reliability across different operational conditions. Innovative sealing methods and variably adjustable vacuum and pressure characteristics are included to achieve efficient operation at different speeds and pressures. In such pumps, noise suppression and cavitation reduction are priorities, often addressed through fluid communication grooves and piston interactions. Some designs incorporate advanced porting, sealing methods, and pressure regulation techniques to further enhance operational efficiency and reduce waste. The integration of components like cam members with continuous interior surfaces is noted to improve pressure balancing and overall performance, highlighting a significant advancement in pump design. These variable displacement and variable volume strategies in vane pump technology aim to provide a range of operational capabilities while maintaining energy efficiency and enhancing mechanical reliability.
Inventors developed a variable volume vane pump with pressure-loaded end plates to optimize efficiency and minimize leakage. The pump uses hydraulic force on one end plate, adjusting to pressure variations, and features crescent-shaped pressure zones for stable operation.
Published By:
AD Mills, WF Ruhland - US Patent 3,664,776, 1972 - Google Patents
Variable fluid volume vane pump reduces cavitation and noise by collapsing fluid bubbles. Adjustable cam ring and communication grooves enhance smooth pressure characteristics.
Published By:
K Yuge - US Patent 5,366,354, 1994 - Google Patents
A durable variable displacement vane pump enhances pressure balancing with robust components. It features a continuous cam surface to reduce wear, improving efficiency and durability.
Published By:
JG Sundberg, BJ Bisson, MC Desai… - US Patent 5,545,014, 1996 - Google Patents
Constant volume variable speed vane pump designed by H.C. French, filed in 1949. The pump delivers constant hydraulic fluid regardless of engine speed.
Published By:
HC French - US Patent 2,600,633, 1952 - Google Patents
O. Mueller's invention enhances pump efficiency by controlling fluid delivery and pressure, supporting variable delivery volumes and pressures through adjustable outlet mechanisms. The pump's mechanism enables reduced fluid delivery at increased pressures, maintaining system balance and efficiency across various pump designs.
Published By:
M Otto - US Patent 3,120,814, 1964 - Google Patents
Variable displacement vane pump includes multiple intake and discharge ports. Control means adjusts fluid discharge by controlling port communication.
Published By:
T Ohe - US Patent 4,421,462, 1983 - Google Patents
Vane pump offers variable pressure, improving mechanical efficiency. Controls adjust displacement against fluctuations.
Published By:
DR SHULVER, AC Cioc - US Patent 8,047,822, 2011 - Google Patents
Variable output vane pump for automatic transmissions enhances sealing and performance, optimized for efficiency and compact design.
Published By:
T Okoh, T Matsumoto, N Hirokawa - US Patent 4,531,893, 1985 - Google Patents
W.R. Tucker's pump has a rotating cylinder for efficiency and reduced wear, with adjustable delivery.
Published By:
WR Tucker - US Patent 2,348,428, 1944 - Google Patents
The variable capacity vane pump increases efficiency with improved porting and sealing. The invention features an adjustable eccentric outer ring and unique pressure sealing to minimize leakage.
Published By:
AW Gaubatz - US Patent 2,955,542, 1960 - Google Patents