There are three main types of hydraulic pumps: gear pumps, vane pumps and piston pumps.
1. Gear pump:
Advantages: small size, simple structure, less strict requirements for the cleanliness of the oil, and cheaper price;
Defects: However, the pump shaft is subject to unbalanced force, serious wear and loss, and large leakage.
2. Vane pump: It is divided into double-effect vane pump and single-effect vane pump.
Advantages: uniform pump flow, stable operation, low noise, higher working pressure and volumetric efficiency than gear pumps;
Defects: The structure is more messy than the gear pump.
3. Piston pump:
Advantages: high volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic system;
Defects: The structure is messy, the data and processing accuracy are high, the price is expensive, and the cleanliness of the oil is high.
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Rexroth Hydraulic Pumps – What are the advantages of electric proportional valves?
1) Electrical proportional mode, to achieve stepless control of outlet pressure.
2) It can realize remote control and program control.
3) Compared with intermittent control, the system is simplified and the components are greatly reduced.
4) Compared with hydraulic proportional valves, it is small in size, light in weight, compact in structure, and lightweight.
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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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The difference between Rexroth hydraulic pump and hydraulic motor
Rexroth hydraulic pumps:
1. Most users think of a pump as an element that outputs a flow rate at a certain pressure
2. Hydraulic pumps often work at stable and high speeds
3. Generally, it is required that the pump can output high pressure when the rated speed is saved
4. In some applications, the pump is generally only ...
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Rexroth hydraulic pumps – use, repair and assembly of gear pumps
1. What should I pay attention to when using a gear pump?
(1) The oil suction height of the gear pump shall generally not be greater than 500mm.
(2) The gear pump should be directly connected with the motor through the flexible coupling, generally not rigidly connected or connected with the power source through the gear pair and belt mechanism, so as to avoid unilateral force, ...
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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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Disassembly and cleaning steps for Rexroth hydraulic valves
(1) Disassembly. For hydraulic valves, although most of the parts are connected by bolts, the hydraulic valve is not disassembled when designed, and if it is forcibly disassembled due to lack of special equipment or lack of professional technology, it may lead to damage to the hydraulic valve. ...
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Rexroth linear drive technology focuses on the future
From long-lasting individual components to intelligent mechatronic components: Bosch Rexroth is pushing linear applications forward in a wide range of markets with a wide range of high-quality products. Our new product developments focus on reliability, cost-effectiveness and sustainability. For a long time, the market has been tending to ...
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How to adjust the pressure and displacement of the hydraulic piston pump?
1. Adjust the displacement of the pump: The larger the displacement of the hydraulic piston pump, the greater the flow and pressure. The displacement can be adjusted by replacing the displacement of the pump or adjusting the eccentricity distance of the pump.
2. Adjust the valves in the hydraulic system: The valves in the hydraulic system can control the flow and pressure.
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How to select Rexroth solenoid valves
1. Select the solenoid valve according to the pipeline parameters: the diameter specification (i.e., DN) and the interface mode 1) determine the diameter (DN) size according to the on-site pipeline inner diameter size or flow requirements; 2) Interface mode, generally > DN50 to choose the flange interface, ≤ DN50 can be freely selected according to the user's needs. ...
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Rexroth builds a new plant in Querétaro, Mexico
Bosch Rexroth, a leading global supplier of drive and control technology, is building a new plant in Querétaro, Mexico, and will further strengthen its presence in North America. Bosch Rexroth has been successfully operating in Mexico for 40 years. From the summer of 2023, the walking machines of Querétaro ...
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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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Rexroth launches a safe and reliable remote update service
Progressive optimization of software functions for off-highway equipment requires large-scale remote device updates: The new version of BODAS Connect will provide a solution for this (Image source: Bosch Rexroth AG)
Bosch Rexroth will present a solution for remote updates of off-highway equipment at bauma 2022 ...
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How Rexroth hydraulic pumps are adjusted
1) Swash plate axial piston variable pump, used for open hydraulic rotation back
2) Mainly used in the field of mobile machinery
3) The pump works under the condition of self-priming, mailbox pressurization or with built-in suction pump, (centrifugal pump).
4) The output flow rate is proportional to the driving speed, and ...
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Rexroth hydraulic pump - introduction to the characteristics of proportional valves
Proportional control valve is a kind of control valve that continuously and proportionally controls the flow, pressure and direction of the hydraulic system according to the input electrical signal, and its output flow and pressure can not be affected by load changes.
Compared with ordinary hydraulic components, proportional valves have the following characteristics:
( ...
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Rexroth Hydraulic Pumps - What are the hazards of hydraulic pumps entering the air?
First, the rigidity of the hydraulic oil decreases sharply, resulting in the slower response of the hydraulic system and the reduction of efficiency, resulting in crawling and vibration of the actuator.
Second, air bubbles will cause oil film to be unable to form between moving parts, resulting in poor lubrication and aggravating the wear of hydraulic components.
The third is in the air ...
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Rexroth A10VO series variable piston pump structure description
A10VO series variable piston pump is one of Rexroth variable piston pumps, A10VO series is Rexroth medium pressure series swash plate axial piston pump, nominal pressure 280bar, used in open hydraulic circuits, the pump is very widely used, is used in various fields, including but not limited to...
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Rexroth Hydraulic Pump - Introduction to Hydraulic Piston Pump and How to Maintain It
1. Hydraulic pump:
Straight shaft swash plate piston pumps are divided into two types: pressure oil supply type and self-priming oil type. Most of the pressure oil supply hydraulic pumps use oil tanks with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming oil energy of the self-priming hydraulic pump ...
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Types and characteristics of Rexroth gear pumps
Classification and structural characteristics of Rexroth gear pumps
According to the form of gear meshing, it can be divided into external meshing and internal meshing.
According to the different tooth curves, it can be divided into: involute and cycloid.
According to the surface form, it can be divided into spur gear type, helical gear type, herringbone gear ...
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Rexroth Hydraulic Pump - Oil Lift Piston Pump Parts Replacement Fault Repair
The replacement specification of oil lift piston pump parts, when the various clearances listed are out of tolerance, can be corrected as follows:
1) If the cylinder body is inlaid with copper sleeve, it can be corrected by replacing the copper sleeve. First trim a set of plunger rods to a consistent size, and then polish the outer part with sandpaper of more than 1000#.
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Classification of Rexroth solenoid valves and their introduction
1. Direct-acting solenoid valve
Principle: When the normally closed type is energized, the electromagnetic coil generates electromagnetic force to lift the open part from the valve seat and open the valve; When the power is off, the electromagnetic force disappears, the spring presses the opening on the valve seat, and the valve is open.
Features: In vacuum, negative pressure, zero pressure ...
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