Coal Slurry Pump A11VO145 + A11VO145
1. Basic Overview
- Brand: Bosch Rexroth
- Model: Tandem dual axial piston pump A11VO145 + A11VO145
- Type: Swash plate variable axial piston pump for open hydraulic circuit
- Application: Coal slurry conveying system, slurry pumping equipment and mining hydraulic power unit
2. Model Code Explanation
- A11VO: Variable piston pump series for open circuit
- 145: Nominal displacement of single pump: 145 cm³/r
3. Core Technical Parameters (Single Pump)
- Nominal displacement: 145 cm³/r
- Rated working pressure: 35 MPa (350 bar)
- Peak pressure: 40 MPa (400 bar)
- Maximum permissible rotating speed: 2300 rpm
- Volumetric efficiency under rated condition: ≥ 94%
- Common control modes
- LR: Constant power control
- DR: Constant pressure control
- EP: Electro-proportional displacement control
- Structure: Through-shaft drive, applicable for dual pump tandem assembly
4. Combined Performance Parameters
- Total combined displacement: 290 cm³/r
- Total flow rate at 2300 rpm: 667 L/min
- Total output power under 35 MPa: Approximately 389.08 kW
- Advantages: Independent oil supply of dual circuits with sufficient power reserve, suitable for large-flow and high-resistance coal slurry conveying operation
5. Product Characteristics
1. Excellent high pressure resistance, stable operation and strong tolerance against load impact from slurry medium
2. Constant power control adapts to varying loads automatically, saving energy and reducing heat generation
3. Integrated tandem design features compact layout and low transmission loss, well suited for limited installation space of mining machinery
4. Cast iron housing and high-strength internal piston and cylinder components ensure outstanding wear resistance, long service life and low maintenance frequency
6. Regular Standard Models
- A11VO145LRDS + A11VO145LRDS: Dual constant power control type
- A11VO145DR + A11VO145DR: Dual constant pressure control type
I. Product Overview
TheA11VO145 + A11VO145combination is not a traditional coal slurry pump but a high-performance hydraulic piston pump system designed for heavy-duty machinery such asroadheadersandshearers. It serves as the main hydraulic power source in their hydraulic systems.
• Model & Configuration: TwoA11VO145hydraulic piston pumps connected in tandem.
• Applications: Widely used in hydraulic systems of roadheaders, shearers, and other heavy machinery.
• Brand & Manufacturer: Produced byRexroth (Bosch Rexroth), a leading provider of industrial automation solutions with deep expertise in hydraulic transmission and control technologies.
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II. Key Features
1. High Performance
• TheA11VO145pump adopts aswashplate design, enabling adjustable displacement and flow by varying the swashplate angle. It offers highvolumetric and mechanical efficiency.
• When used in tandem, the two pumps providegreater flow and pressure, meeting the demanding hydraulic power requirements of heavy machinery.
2. High Reliability
• Constructed fromhigh-quality materials, the pump body exhibits excellentwear and corrosion resistance.
• Precision manufacturing processes and stringent quality control ensurelong-term reliability and durability.
3. Versatile Control Options
• Supports multiple control methods, includingconstant power control, constant pressure control, and electro-hydraulic proportional control, allowing flexible adjustments based on operational needs.
• Externally adjustable control options enablepressure adjustments during operation, enhancing equipment adaptability.
4. Easy Maintenance
• The pump’smodular designsimplifies disassembly and maintenance.
• Equipped with acomprehensive fault diagnosis and alarm system, it facilitates early detection and resolution of potential issues, reducing downtime and maintenance costs.
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III. Technical Specifications (Example)
• Model: A11VO145 + A11VO145
• Displacement per pump: 145 cc/rev (may vary by product version)
• Nominal Pressure: 32 MPa (some models up to 350 bar or higher)
• Speed Range: 500–2,200 rpm (may vary by product version)
• Mounting Type: Flange-mounted
• Suitable Medium: Hydraulic oil
• Operating Temperature Range: 30–90°C (may vary by product version)
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IV. Applications
• Roadheaders: Provides hydraulic power to drive various actuators for excavation.
• Shearers: Powers thecutting and traction mechanismsin coal mining operations.
• Other Heavy Machinery: Used incranes, road rollers, and other equipment requiring high-performance hydraulic power.
