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. When the eccentric wheel rotates, the plunger moves once on both sides to suck the oil downwards and drain the oil upwards. The amount of oil discharged per revolution of the pump is called displacement, and the displacement is only related to the structural parameters of the pump
2. Horizontal piston pump
The horizontal piston pump consists of multiple plungers (usually 3 or 6), and the hydraulic pumps are installed in parallel. The crankshaft directly pushes the plunger to reciprocate through the connecting rod slider or eccentric shaft to achieve liquid suction and discharge. They also use valve-type flow distribution devices, most of which are fixed pumps, and emulsion pumps in coal mine hydraulic support systems are generally horizontal piston pumps. The emulsion pump is used for the coal mining face, it is the liquid, and the pressure support provides the emulsion. Its working principle is that the rotation of the crankshaft drives the piston to reciprocate to achieve the absorption and discharge of liquid
3. Axial
Axial piston pump (English name: piston pump) is a type of piston pump in which the reciprocating direction of the piston or plunger is parallel to the central shaft of the cylinder.
Axial piston pumps work using volume changes caused by the reciprocating motion of the plunger in the plunger bore parallel to the propeller shaft. Since both the plunger and plunger bore are round parts, high-precision matching is possible, resulting in high volumetric efficiency.
4. Straight axis rotating swash plate
Straight shaft rotary swash plate piston pumps are divided into pressure supply type and self-priming type. Most pressure-fed hydraulic pumps use a tank with air pressure. After each start of the machine, the hydraulic oil tank with air pressure supply cannot operate the machine until the hydraulic oil tank reaches the working air pressure
If the machine is started when the air pressure in the hydraulic tank is insufficient, it will pull down the sliding shoe in the hydraulic pump, causing abnormal wear and tear on the return plate and pressure plate in the pump body
5. Radial
Radial piston pumps can be divided into valve distribution and shaft distribution
Radial piston pumps with valve distribution have the disadvantages of high failure rate and low efficiency. The axial flow radial piston pump developed in the seventies and eighties of the last century overcame the shortcomings of the valve flow radial piston pump. Due to the structural characteristics of radial pumps, fixed axial flow distribution radial piston pumps have the advantages of impact resistance, long service life and high control accuracy
Under the action of variable plunger and limit plunger, by changing the eccentricity of the stator, the displacement of the variable stroke short pump is realized, the maximum eccentricity is 5-9mm (depending on the displacement), and the variable stroke is very short. In addition, the variable mechanism is designed for high-pressure operation and is controlled by a control valve, so the pump has a fast response speed.
The radial structure design overcomes the problem of eccentric wear of the sliding shoe of the axial piston pump, and greatly improves its impact resistance.
6. Hydraulic
The hydraulic piston pump is a hydraulic oil tank supplied by air pressure, and after each start of the machine, the machine can only be operated after the hydraulic oil tank reaches the working air pressure. Straight shaft rotary swash plate piston pumps are divided into pressure supply type and self-priming type
Most pressure supply hydraulic pumps use an oil tank with air pressure, and some hydraulic pumps are equipped with a make-up sub-pump to supply pressure oil to the inlet of the hydraulic pump. The self-priming hydraulic pump has strong self-priming capacity and does not require internal oil supply.
|
More on that
|
Rexroth's magnetic levitation conveying technology breaks through the bottleneck of production efficiency
● Top performance, flexible and easy to use
● From components, modules to systems, zero threshold matching on demand
● More value-added services, users have no worries
Worry-free, flexible and easy to use (Image source: Bosch Rexroth China)
"Production efficiency" is an eternal topic in the manufacturing industry ...
|
|
Rexroth Hydraulic Pumps – How Does a Hydraulic Pump Work?
In modern construction machinery, basically inseparable from hydraulic working devices, even if the main working devices do not use hydraulic equipment, usually need hydraulic systems to achieve some auxiliary work, hydraulic pressure is so important, and our life and work is very close.
Image
But...
|
|
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 ...
|
|
The solution to the forward rush of the throttle speed control valve of Rexroth vane pump
1. Adopt the correct Rexroth vane pump speed conversion method, the conversion mode of the solenoid valve, the impact is larger, the conversion accuracy is lower, the reliability is poor, but the control flexibility is large;
2. The electro-hydraulic reversing valve uses a current valve with damping, and by adjusting the damping size, the Rexroth blades ...
|
|
A detailed explanation of the alphanumeric meaning of the Rexroth piston pump A10VSO model
Example: A10VSO18DFR1/31R-PPA12N00
A10VS→ swash plate variable pump, this series of industrial drive, nominal pressure 28MPa, maximum pressure 35MPa;
o → operation mode, this series is used in open circuit systems;
18 → displacement specifications of this model ...
|
|
Precautions for the installation of Rexroth pressure reducing valves
1. When installing, the tap water pressure reducing valve should be installed vertically on the tap water pipeline.
2. The arrow on the tap water pressure reducing valve must be consistent with the arrow on the pipeline.
3. The position of the installation of the pressure reduction method must be greater than 4 meters from the valve outlet.
...
|
|
Areas of application for Rexroth hydraulic pumps
Rexroth hydraulic pumps have a wide variety of applications and are available in all walks of life. In terms of pump performance, there are two types of pumps: giant pumps and micro pumps. Giant pumps can reach flow rates of hundreds of thousands of cubic meters per hour, while micro pumps can reach less than tens of milliliters per hour. Judging by the pressure of the pump, it can be ...
|
|
Rexroth's view of automation trends: Leading the new trend of automation: freedom and openness for all
· Integrate know-how from all parties through an ecosystem
· Low-code/no-code: Five times faster time to market
· Independence from global supply chains
· Long-term availability
The industrial automation transformation is well underway and will take a big step forward in 2022.
|
|
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 ...
|
|
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 ...
|
|
Bosch Rexroth wins the NED Innovation Award in the Material Handling and Packaging category
The MP1000R developed by Bosch Rexroth in cooperation with Geek+ won the Innovation Award in the Material Handling and Packaging category of the New Equipment Digest (NED). The award is made by NED readers to vote for the finalists based on the product information provided to determine the most innovative product in the category.
MP1 ...
|
|
The principle and method of Rexroth hydraulic pump oil quantity adjustment
1. The principle of Rexroth hydraulic pump oil volume adjustment
Generally, in order to adapt to the specific requirements of the diesel engine under the load, the fuel injection pump must be able to adjust the maximum fuel supply to the zero oil supply range of the whole machine when the fuel supply is running.
|
|
Structural features of Rexroth piston pump A2FO28/61R-PPB05
1. Large inclination components: all specifications have the same 40 degree inclination angle, high power, small size, high efficiency and economical structure.
2. Monolithic conical plunger with two sealing rings
3. The bearing structure is easy to install and maintain, and has a long service life.
4. Specially improved series of ...
|
|
Bosch Rexroth generated sales of 7 billion euros, a record for the company's history
Despite the challenging environment, Bosch Rexroth achieved double-digit sales growth in fiscal 2022;
Demand for new orders remained strong at 7.3 billion euros;
Record investments in R&D, innovation and production networks;
Through acquisitions and mergers ...
|
|
Rexroth A10VSODFR pressure flow regulation method for piston pumps
1) Flow regulation
Port X is connected to the oil tank to relieve pressure, and port B is closed, and the pressure reaches the required pressure by rotating the adjusting screw on the FR of the flow control valve, and the general FR setting value is between 14 Bar and 22 Bar.
2) Highest pressure regulation
Close the flow control valve FR, plug ...
|
|
Common Fault Causes and Troubleshooting Methods of Hydraulic Pumps(1-8)
1. Cause of failure: the oil level of the hydraulic oil tank is too low;
Exclusion method: Add hydraulic oil.
2. Cause of failure: Hydraulic oil is not used according to the season;
Exclusion method: Usually suitable for 46# hydraulic oil (or 68#) without special replacement, consider using it when it is cold in the north in winter...
|
|
Analysis of the fault phenomenon and causes of Rexroth hydraulic oil pump
1. Check the internal leakage of the boom cylinder. The easiest way to do this is to raise the boom and see if it has a noticeable free descent. If the drop is obvious, disassemble the cylinder for inspection, and replace the sealing ring if it is worn;
2. Check the control valve. First of all, clean the safety valve and check whether the valve core is grinding.
|
|
How to use Rexroth balance valves
1. The flow direction of the medium should be consistent with the direction of the arrow of the valve body;
2. The differential pressure balance valve should be installed on the return pipe, the valve is connected to the guide pipe, and the other end of the pressure guide pipe is connected with the water supply pipe, and it is recommended to install a 1/2" ball valve at the water supply end of the pressure guide pipe in order to start the function of eliminating blockage;
3、 ...
|
|
The Bosch Rexroth Smart Flex Effector has been awarded the 2023 Hermes Award
With the combination of sensor systems and six degrees of freedom independent kinematics, the Bosch Rexroth Smart Flex Effector compensation module gives industrial robots a human-like sense of touch, providing automation for processes that were difficult to handle or had to be performed manually in the past.
|
|
Rexroth solenoid valves are common faults
Rexroth solenoid valves are composed of solenoid coils and magnetic cores, and are valve bodies containing one or several holes. When the coil is energized or de-energized, the operation of the core will cause the fluid to pass through the valve body or be cut off to change the direction of the fluid. The solenoid parts of the solenoid valve are composed of a fixed core, a moving core...
|
|
Contact
working hours
