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Application: | Machinery |
Hardness: | Soft Tooth Surface |
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Concrete Mixer Truck PV089 Hydraulic Pump for Danfoss: A Technical Description
I. Introduction
The PV089 hydraulic pump designed for concrete mixer trucks within the Danfoss system is an essential component that powers the mixing process. It ensures the smooth and efficient operation of the concrete mixer truck, allowing for consistent and high - quality concrete production during transportation.
II. Design and Construction
A. Housing
The housing of the PV089 pump is a sturdy and durable structure. It is constructed from high - quality materials that are resistant to corrosion, as it is often exposed to harsh environmental conditions such as moisture, dust, and chemicals at construction sites. The material choice also enables it to withstand the mechanical stress caused by the continuous vibrations and movements of the concrete mixer truck. The design of the housing incorporates specific mounting points and connection ports that are precisely engineered for easy integration into the truck's hydraulic system.
B. Internal Components
1. Pistons
The pistons of the PV089 pump are precision - machined components. They are typically made from high - strength materials like hardened steel or specialized alloys with excellent wear - resistance properties. The design of these pistons ensures an optimal fit within the cylinders, with minimal clearance to prevent internal leakage of hydraulic fluid. The surface finish of the pistons is carefully controlled to reduce friction during their reciprocating motion. This not only improves the efficiency of the pump but also extends the lifespan of the pistons. Their size and shape are determined based on the required pressure and flow rate for the concrete mixer truck's hydraulic system.
2. Cylinders
The cylinders of the PV089 hydraulic pump are crafted with great precision. They are made from materials that can endure high - pressure environments and maintain their structural integrity over time. The inner walls of the cylinders are machined to very tight tolerances and are often treated with special coatings or surface treatments. These treatments enhance the smoothness of the walls, reducing friction and providing an effective seal with the pistons. The cylinders are designed to provide reliable support to the pistons throughout their entire stroke, enabling efficient transfer of hydraulic fluid during both the compression and expansion phases of the pump's operation.
3. Valve System
The valve system of the PV089 pump is a complex and crucial part of its design. It consists of different types of valves, including inlet valves, outlet valves, and pressure - control valves. The inlet valves are responsible for allowing the hydraulic fluid to enter the pump from the reservoir. They are designed to open smoothly and without obstruction, ensuring a continuous and laminar flow of fluid. To prevent air from being drawn into the system, the inlet valves are engineered with features that minimize the risk of cavitation. The outlet valves, on the other hand, direct the pressurized fluid from the pump to the hydraulic motor that drives the concrete mixing drum. These valves are built to withstand high - pressure conditions and open and close with great precision to control the flow of fluid. The pressure - control valves play a vital role in maintaining the stability of the hydraulic system. They constantly monitor the pressure within the pump and adjust the flow of fluid as needed to prevent over - pressure or under - pressure situations, thereby protecting the pump and other components of the hydraulic system from potential damage.
III. Operating Principle
A. Intake Stroke
During the intake stroke of the PV089 hydraulic pump, the pistons move in a direction that creates a low - pressure area within the cylinders. This pressure differential causes the hydraulic fluid from the reservoir to flow into the pump through the inlet valves. The design of the pump ensures that the fluid intake is a seamless process. The pistons and the inlet valves are carefully coordinated to prevent any disruptions in the flow of fluid. Additionally, the intake system is designed to minimize the introduction of air bubbles into the hydraulic fluid. This is achieved through features such as optimized valve sizing, a carefully designed fluid path within the pump, and anti - cavitation measures.
Model NO. | PV089 | Model | PV089 |
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 |
Frame Size | mm/Dimensions[mm] | ||||||||||
L | L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 | L9 | L10 | |
PV089 | 394 | 320 | 270 | 118 | 127 | 49 | 17.5 | 327 | 91 | 77.8 | 95.25 |
Frame Size | /Prots | |||||||
P1,P2,R | Z1,M1,M2 | |||||||
PV089 | 7/8-14 UNF-2B | 7/16-20 UNF-2B | ||||||
Technical data of Mixer hydraulic pressure | ||||||||
Model | Units | PV089 | Model | Units | PV089 | |||
Maximum displacement per revolution | cm³ | 89 | Maximum control pressure | MPa | 3.5 | |||
Pump displacement per revolution | cm³ | 18.03 | Filling pressure | MPa | 0.8-2.0 | |||
Maximum pressure | MPa | 35 | Maximum shell pressure | MPa | const0.25,Peak value0.5 | |||
Rated pressure | MPa | 21 | +Maximum revolution | min-1 | 2590 | |||
The dynamic viscosity range of the working liquid activate turn Optimum state |
mm²S-1 | 1000 12-300 25-35 |
Minimum revolution | min-1 | 500 | |||
Type of working fluid | Mineral oil | Rated revolution | min-1 | 1500 | ||||
Operating temperature | ºC | -40~+50 | Shaft steering | clockwise or anticlockwise | ||||
Maximum operating temperature in the tank | ºC | 80 | Maximum swash plate inclination | ° | ±18° | |||
Working fluid purity | μm | 10 | Weight(About) kg | KG | 78 |
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ZTS P68 reducer / gearbox | ZHP P75S reducer / gearbox | A4VG180HD1MT1/32R-NSF02F021-S PISTON pump | 8708919000 |
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