Rexroth hydraulic pump is the power component of the hydraulic system, it refers to the oil pump in the hydraulic system, it is the hydraulic component that provides liquid for hydraulic transmission, and it is also a kind of pump. Its function is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, that is, the oil pump in the hydraulic system that provides power for the entire hydraulic system. Rexroth hydraulic pumps are generally constructed in the form of gear pumps, vane pumps and piston pumps. The role of Rexroth hydraulic pumps is to convert the mechanical energy of power machines (such as electric motors, internal combustion engines, etc.) into the pressure of liquids.
Rexroth hydraulic pumps are classified as follows:
According to the adjustability of the flow rate, it can be divided into: pump and fixed pump.
A pump that adjusts the output flow rate as needed is called a variable flow pump.
If the output flow cannot be adjusted, it is called a fixed pump.
According to the general structure of the hydraulic system pump, it is divided into: gear vane pump and piston pump.
Gear pump: small size, simple structure, low requirements for oil cleaning, low price; However, the pump shaft is subject to unbalanced force, serious wear and leakage.
Impeller pumps: Double-acting and single-acting vane pumps. The pump has uniform flow distribution, stable operation, low noise, higher pressure excitation and volumetric efficiency than gear pumps, and more complex structure than gear pumps.
Piston pump: high volumetric efficiency, less leakage, can withstand high pressure, mostly used in high-power hydraulic system; However, the structure is complex, the material and processing accuracy are high, the price is expensive, and the oil cleaning requirements are high. Rexroth single piston pump principle. This cam rotates with a motor drive. As the cam pushes the plunger upward, the volume of the seal formed by the plunger and the cylinder block is reduced, and the oil is extruded from the seal and discharged to the desired position through the check valve. As the cam rotates to the descending position of the curve, the spring forces the plunger downward, forming a certain vacuum, and the oil in the tank enters the sealing body under the action of atmospheric pressure. The protrusion makes the plunger continue to rise, the sealing volume periodically decreases and increases, and the pump also continuously sucks and discharges oil.
Rexroth hydraulic pumps work on the principle of hydraulic components that supply pressurized liquid to the hydraulic drive system, which belongs to a type of pump. Its role is to convert the mechanical energy of a power machine (such as an electric motor, internal combustion engine, etc.) into the pressure of a liquid. The working principle of the single piston pump is shown in the figure. This cam rotates with a motor drive. As the cam pushes the plunger upward, the volume of the seal formed by the plunger and the cylinder block is reduced, and the oil is extruded from the seal and discharged to the desired position through the check valve. As the cam rotates to the descending position of the curve, the spring forces the plunger downward, forming a certain vacuum, and the oil in the tank enters the sealing body under the action of atmospheric pressure. The protrusion makes the plunger continue to rise, the sealing volume periodically decreases and increases, and the pump also continuously sucks and discharges oil.
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Steps and methods for the second cleaning of the hydraulic system of Rexroth Rexroth hydraulic pumps
1) Preparation for cleaning.
(1) Preparation of cleaning oil. The cleaning oil can be selected as Rexroth Rexroth hydraulic pump hydraulic system working oil or test oil for the machine to be cleaned. It is not allowed to use kerosene, gasoline, alcohol or steam as the cleaning medium, so as not to corrode the hydraulic components, pipelines ...
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Rexroth launches the new linear module SMS
● Five pre-configured sizes: 30-120 mm
● Optional compact motor accessories
● Order online and deliver in stock
The new linear axes are suitable for handling cost-sensitive small parts and can be used as an alternative to complex pneumatic solutions. (Image source: Bosch Rexroth Co., Ltd.)
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Rexroth Hydraulic Pumps - Classification of Piston Pumps and Their Detailed Description
1. Classification of piston pumps
Piston pumps are generally divided into single piston pumps, horizontal piston pumps, axial piston pumps and radial piston pumps
1. Single piston pump
It is mainly composed of an eccentric wheel, a plunger, a spring, a cylinder block and two check valves. A closed volume is formed between the plunger and the cylinder bore. Slanting...
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Rexroth hydraulic pump - piston pump maintenance precautions
1. Check whether the piston pump is damaged and corroded, and replace it if so.
2. Check the fit of the plunger pair. Insert the end of the plunger into the plunger sleeve, tilt it about 60°, and if the plunger can slide slowly under its own action, it will fit well.
3. Check the tightness of the plunger pair. Use...
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Rexroth oil pump cartridge replacement operation
Rexroth oil pump is a hydraulic system that converts the mechanical energy of the prime mover (motor, internal combustion engine, etc.) into liquid pressure energy.
Rexroth oil pumps can be divided into two types: positive displacement and non-volumetric type. The non-volumetric type has centrifugal pumps, axial flow pumps, etc., and uses high-speed rotating impellers to produce true ...
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How to adjust Rexroth A11V hydraulic pump?
In general, there are two ways to adjust it
1. Add a speed regulating valve at the outlet of the pump to adjust the output speed of the oil volume, so as to achieve the amount of oil used
2. Add a variable pump with oil volume, adjust the angle of the oil pan to achieve the input quantity of changing the oil volume. This method compares ...
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Common failures of Rexroth vane pumps
1. Check whether the Rexroth vane pump shaft follows the motor rolling: if the motor rolls and the Rexroth vane pump shaft does not rotate, it may be a missing key on the Rexroth vane pump shaft or the key on the motor.
2. Check whether the rotation direction of Rexroth vane pump is correct: the steering is wrong, Rexroth ...
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Rexroth solenoid valve can not open the reason analysis and solutions
1) Coil problem
Use a voltmeter to measure the voltage across the coil. This should help you determine if the coil is working properly. You can also gently pull the coil to feel if there is a magnetic force acting on it. If it proves difficult to pull, the coil generates a magnetic field, which creates an excitation.
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What are the relevant applications for Rexroth vane pumps?
Rexroth vane pump speed selection
Rexroth vane pump flow rate and speed linear relationship, relative to low speed screw pump, high speed screw pump can increase the flow and head, but the power is significantly increased, high speed accelerates the wear between the rotor and the stator, must make the screw ...
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The opening ceremony of the second phase of the Bosch Rexroth plant in Xi'an was a complete success
On November 11, 2020, the opening ceremony of the second phase of Bosch Rexroth (Xi'an) Electronic Drive and Control Co., Ltd. was grandly held. With the completion of the second phase of the project, the Xi'an plant will become the overall supplier of the group's global intelligent manufacturing and industrial automation solutions, and Bosch Rexroth will provide the best solutions for the Chinese market.
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Rexroth hydraulic oil pump disassembly process
1. Loosen and remove the connecting screws on the pump cover and bearing end cover.
2. Remove the positioning pin, pump cover and bearing cover.
3. Take out the transmission shaft and shaft sleeve from the housing of the pump.
4. Take out the two gears from the casing of the pump.
5. Remove the floating side plate and sealing ring ...
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Precautions for Rexroth pressure reducing valves
1. For easy operation and maintenance, the valve is generally installed upright on the horizontal pipeline.
2. The installation of the pressure reducing valve must be in strict accordance with the direction of the arrow on the valve body and keep it consistent with the direction of fluid flow. If the water quality is not clean and contains some impurities, it must be installed at the upstream inlet of the pressure reducing valve ...
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Rexroth Relief Valve - Common Faults and Solutions for Relief Valves
1. Causes of noise and vibration failure of relief valves
The components that are prone to noise in hydraulic devices are generally considered to be pumps and valves, and the valves are mainly relief valves and electromagnetic reversing valves. There are many factors that contribute to noise. There are two types of noise in the relief valve: velocity sound and mechanical sound. The main ...
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The Rexroth Smart Handling Function Kit makes it easy for you to carry out your handling tasks
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Test method for linear proportional control of numerical control pressure of Rexroth proportional valves
1. The position of the four "flow and pressure limit control" potentiometers on the CPU unit of the computer.
2. The preset parameters adjust the four-stage injection speed to 50 and the pillow pressure to 00
3. Start the oil pump motor, and when the temperature of the sol barrel reaches the sol temperature, press the manual injection button to make the screw ...
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How does a Rexroth proportional valve work?
With the continuous progress of technology and the needs of market applications, the emergence of proportional valve is a more intelligent valve, which provides convenience for technicians, but also reduces the tedious work tasks, the most important structural unit of proportional valve is the proportional signal control system, which is based on the specific ring ...
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What are the ways to predict maintenance failures for Rexroth piston pumps in advance?
1. Conduct regular testing and diagnosis of Rexroth piston pumps
According to the collected fault signal, draw the online working performance curve of Rexroth piston pump and make an evaluation report. Based on the results of the monitoring, it is decided whether to repair the Rexroth piston pump. Thus determining the most ...
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Rexroth Hydraulic Pumps – Hydraulic pumps can be divided into several types according to their working principle
Hydraulic pumps can be divided into four types according to their working principle, the details are as follows.
1. Gear pump
The volume is smaller, the structure is simpler, the cleanliness of the oil is not strict, and the price is cheaper; However, the pump shaft is subject to unbalanced force, severe wear and tear, and large leakage.
Externally meshing gear pump when tooth ...
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What are the application ranges of Rexroth oil pumps?
1) Piston pumps are generally used in the hydraulic transmission systems of machine tools, metallurgy, forging, mining and hoisting machinery, and are especially widely used in high-power hydraulic transmission systems.
2) REXROTH vane pumps are generally used in mining, coal, metallurgy, chemical industry, environmental protection and other industries. One...
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