Overview
The bent axis variable displacement piston pump is a critical component in hydraulic systems, offering precise flow control by altering the angle of the piston barrel relative to the drive shaft. Unlike fixed-displacement pumps, its variable design optimizes energy efficiency by adjusting flow rates to demand. Widely used in heavy machinery, it balances high-pressure performance (up to 450 bar) with compactness, making it ideal for mobile and industrial applications. First developed in the mid-20th century, modern iterations incorporate advanced materials like hardened steel and composite seals to enhance longevity. Leading manufacturers include Bosch Rexroth, Parker Hannifin, and Kawasaki Heavy Industries, which adhere to ISO 4406 standards for hydraulic fluid cleanliness.
Structure and Working Principle
The pump consists of a rotating cylinder block, pistons, a swashplate, and a drive shaft. The pistons are connected to the drive shaft at an offset angle (typically 15°–25°), and their reciprocating motion generates flow. Adjusting the swashplate angle changes the piston stroke length, varying the displacement per revolution. Key components like the valve plate and porting system ensure smooth fluid transfer. The bent-axis design reduces side loads on pistons, minimizing wear. High-pressure models often include pressure compensators or load-sensing controls to automate flow adjustments, improving system responsiveness.
Key Features
1. **Variable Displacement**: Enables energy savings by matching output to load requirements. 2. **High Efficiency**: Mechanical efficiencies exceed 90% due to reduced internal leakage. 3. **Robust Construction**: Hardened steel components withstand abrasive fluids and continuous operation. 4. **Low Noise**: Precision machining and balanced pistons reduce vibration. Optional features include integrated sensors for real-time monitoring and corrosion-resistant coatings for marine applications.
Application Areas
Common uses include: - **Construction**: Excavators, cranes, and bulldozers for precise hydraulic control. - **Agriculture**: Tractors and harvesters requiring variable speed and torque. - **Industrial**: Plastic injection molding machines and press tools. - **Mobile Hydraulics**: Forestry equipment and mining vehicles operating in harsh conditions. These pumps excel in systems demanding both high power density and adaptability.
Maintenance and Precautions
Regular maintenance extends service life: 1. **Fluid Quality**: Use ISO VG 46 or similar hydraulic oil; maintain cleanliness to NAS Class 8. 2. **Inspection**: Check seals and bearings every 1,000 operating hours; replace if worn. 3. **Cavitation Prevention**: Ensure inlet pressure exceeds NPSH requirements to avoid damage. Avoid prolonged operation at maximum pressure to reduce heat generation. Leak detection kits can preempt system failures.
B2B Procurement Guide
When sourcing: 1. **Specifications**: Confirm displacement range (e.g., 10–100 cc/rev) and pressure ratings. 2. **Compatibility**: Verify mounting flange standards (SAE or ISO) and shaft connections. 3. **Suppliers**: Prefer vendors with ISO 9001 certification and localized service support. Bulk orders (10+ units) may attract 5–15% discounts. Request test reports for noise and efficiency validation.
Related Manufacturers
- 主营：干燥箱、白度仪、试压泵、变量变量泵、带锯机、木工机床、压刨机、投料机、爬楼机、数控定位架、灌装机、钉角机、扬尘监测仪、铆钉机、内窥镜、剥线机、除锈机、测亩仪、插桶泵、加油机、二氧化碳测定仪、尘埃粒子计数器、脱油机、中药粉碎机、增氧机
- 主营：单体液压支柱、无压风门、固定式矿车、轴向柱塞泵、矿用混凝土搅拌机、炮泥机、刮板输送机、道岔、污水泵、枕木、平台灯、电控箱、g10风镐、道夹板、三用阀、电机车、扒渣机、封孔器、挡车器、振动筛、喷浆机、除铁器、密闭罐、给煤机、雾炮机、凿岩机
- 主营：减速机、液压泵、传感器、柱塞泵、斜轴马达、双联泵、叶片泵、液压缸、高压油泵、法兰耳轴、原装油缸、传动柱塞、煤矿设备、拉杆油缸、液压主泵、米制油缸、液压马达、回路油泵、定量油泵、双联油泵、液压油泵、液压油缸、液压配件、工业高压泵、液压主油泵
- 主营：柱塞泵配件、液压泵、液压马达
- 主营：摆线齿轮泵、NOP油泵、双向摆线泵、柱塞泵、变量柱塞泵、进口冷却泵、电磁阀、电磁换向阀、哈伯叶片泵、哈伯双联叶片泵
- 主营：[]
- 主营：力士乐柱塞泵马达、丹佛斯柱塞泵马达、威格士柱塞泵马达、减速机、泵马达零配件、控制阀
- 主营：液压阀、液压泵、液压马达、斜轴式柱塞油泵、液压油缸、油泵电机组、液压系统、电磁阀、电动泵、阀门定位器
- 主营：力士乐齿轮泵、丹佛斯齿轮泵、摆线马达、力士乐柱塞泵、DANFOSS柱塞泵、PARKER柱塞泵、VICKERS柱塞泵、萨姆柱塞泵、伊顿EATON柱塞泵、OILGEAR柱塞泵、叶片泵、Rexroth计量泵、力士乐柱塞马达、丹佛斯柱塞马达、波克兰柱塞马达、HYDAC贺德克油泵、VIVOLO齿轮泵、Galtech齿轮泵、SETTIMA齿轮泵、CASAPPA齿轮泵、马祖奇齿轮泵、RONZIO齿轮泵、Boden齿轮泵、Atos齿轮泵、BUCHER齿轮泵
- 主营：柱塞马达、高压油泵、精工油泵、柱塞泵、轴向柱塞泵、油泵电机组
- 主营：栓塞泵、高压油泵、柱塞马达、柱塞泵、斜轴马达、斜盘式通轴泵、斜轴式定量泵、锻压机床、油泵电机组、曲轴连杆马达
- 主营：力士乐A11VO260LRDS柱塞泵、行走减速机
- 主营：齿轮泵、复合阀、调压阀、柱塞泵、减压阀、手动阀、稳定阀、比例阀、注塑机、单向阀、电动泵、电磁阀、截止阀、止回阀、高压泵、背压阀、方向阀、转子泵、铸铁阀、液压泵、电液阀、插装阀、叠加阀、电机泵、油压阀
- 主营：电磁阀、液压油泵、液压缸
- 主营：柱塞泵