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Concrete Mixer Truck PV22 Hydraulic Pump for Danfoss: A Detailed Account
I. Introduction
The PV22 hydraulic pump for concrete mixer trucks within the Danfoss system is a fundamental component that enables the efficient operation of these vehicles. It plays a crucial role in the concrete mixing process during transportation, ensuring the homogeneity of the concrete mixture.
II. Design and Construction
A. Housing
The housing of the PV22 pump is engineered to endure the tough conditions of a concrete mixer truck environment. Made from high - quality materials, such as corrosion - resistant alloys, it can withstand exposure to dust, moisture, and temperature variations. It is also designed to handle the mechanical stress from the truck's movement and the mixing operation. The housing has carefully designed mounting points and connection ports for seamless integration into the truck's hydraulic system.
B. Internal Components
1. Pistons
The pistons are precision - machined from materials like hardened steel. Their design ensures a tight fit within the cylinders to minimize fluid leakage. The surface is finished to reduce friction during reciprocating motion, enhancing the pump's efficiency and lifespan. The pistons are optimized in size and shape to generate the appropriate pressure and flow rate for the mixer truck's hydraulic needs.
2. Cylinders
The cylinders are crafted with high precision. Made from materials capable of withstanding high pressure, their inner walls are machined to tight tolerances and often have special treatments. These treatments make the walls smoother, reducing friction and providing an effective seal with the pistons. The cylinders support the pistons during their entire stroke for efficient fluid transfer.
3. Valve System
The valve system consists of inlet, outlet, and pressure - control valves. The inlet valves allow smooth entry of hydraulic fluid from the reservoir, preventing air entrapment. The outlet valves direct pressurized fluid to the hydraulic motor of the mixing drum. The pressure - control valves maintain stable pressure within the pump by adjusting the fluid flow to avoid over - or under - pressure conditions.
III. Operating Principle
A. Intake Stroke
During the intake stroke, the pistons create a low - pressure area in the cylinders. This causes the hydraulic fluid to flow from the reservoir through the inlet valves. The design coordinates the pistons and valves to ensure continuous and smooth fluid intake, minimizing air bubbles.
B. Compression and Discharge
After fluid enters the cylinders, during the compression stroke, the pistons reduce the fluid volume, increasing the pressure. The pressurized fluid is then discharged through the outlet valves to the mixing drum's hydraulic motor. The pressure generated overcomes the drum's resistance, including the weight of the concrete and friction.
C. Pressure Regulation
The pressure - control valves constantly monitor the pump's pressure. If it exceeds the maximum set value, the valves open to bypass fluid, maintaining a stable pressure. If the pressure drops too low, the pump adjusts to increase it, ensuring sufficient power for the mixing drum.
IV. Performance Characteristics
A. Flow Rate
The PV22 pump provides a specific and consistent flow rate of hydraulic fluid, determined by the mixer truck's mixing drum requirements. The flow rate can be adjusted within a certain range, making it suitable for different drum sizes and mixing conditions.
B. Pressure Capacity
It has significant pressure capacity to handle the demands of the mixer truck's hydraulic system. This enables it to drive the mixing drum under various load conditions, including heavy concrete loads.
C. Efficiency
The pump is designed for high efficiency. The low - friction pistons and cylinders, along with an efficient valve system, reduce energy losses. This results in less heat generation within the hydraulic system and better utilization of input energy to drive the mixing drum.
V. Compatibility with Concrete Mixer Trucks
A. Integration with the Hydraulic System
The PV22 pump is designed for easy integration into the existing hydraulic system of a concrete mixer truck. It has standard connection ports and mounting configurations that match the truck's hydraulic lines and chassis, simplifying installation and maintenance.
B. Matching with the Mixing Drum
The pump's flow rate and pressure characteristics are carefully matched to the requirements of the concrete mixing drum. Different drums have different torque and speed requirements, and the PV22 pump can provide the right hydraulic power to ensure proper mixing of the concrete.
Model NO. | PV22 | Model | PV22 |
Performance | Same as Original | Pressure | 36MPa |
Lead Time | 5 Days | Transport Package | Standard Export Wooden Case |
Colour | as Your Request | Usage | Concrete Mixer |
Weight | 85KG | Specification | 52*36*36 |
Trademark | Bodeke | Origin | China |
HS Code | 8413503190 | Production Capacity | 100 Sets/Month |
Technical data of Mixer hydraulic pressure | |||
Model | unit | PV23 | PV22 |
Max. Output per minute | cm³ | 89 | 69.8 |
Pump output per revolution | cm³ | 18.03 | 18.03 |
Maximum pressure | MPa | 35 | 35 |
Rated pressure | MPa | 21 | 21 |
Max. Control pressure | MPa | 3.5 | 3.5 |
Refueling pressure | MPa | 0.8-2.0 | 0.8-2.0 |
Max. Shell pressure | MPa | Constant0.25,Peak0.5 | Constant0.25,Peak0.5 |
Max. Rotational speed | min-1 | 2590 | 2810 |
Min. Rotational speed | min-1 | 500 | 500 |
Rated speed | min-1 | 1500 | 1500 |
Dynamic viscosity range of working fluid Starting Operating Optimal condition |
mm²S-1 | 1000 12-300 25-35 |
1000 12-300 25-35 |
Type of working fluid | Mineral lubricant | Mineral lubricant | |
Working temperature | ºC | -40~+50 | -40~+50 |
Highest temperature in fuel tank | ºC | 80 | 80 |
of working fluid | μm | 10 | 10 |
Orientation of axis | Clockwise or counterclockwise | Clockwise or counterclockwise | |
Max. Shear plate inclination angle | ° | ±18° | ±18° |
Weight kg | KG | 78 | 63 |
Empower your industrial machinery with Bodeke - a leading Chinese manufacturer specializing in the repair and production of a wide range of equipment components.From cement tanker trucks and excavators to mixer trucks,cranes,hydraulic motors,and pumps,our precision-engineered products redefine reliability and performance.Elevate your operations with Bodeke's quality components-your trusted partner in global industrial excellence. | |||
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