1. Rexroth hydraulic pump has no flow rate.
In fact, this is broadly similar to the reason why Rexroth hydraulic pumps have no pressure as mentioned earlier. Here can be referred to by the explanation of the past period, and a few points can be added.
1. The electromagnet of the directional valve installed on the Rexroth hydraulic pump is loose and the coil is short-circuited. This allows the directional valve to be replaced or repaired directly.
2. The hydraulic oil of Rexroth hydraulic pump is polluted and the valve is stuck. Replace all hydraulic fluid with uncontaminated hydraulic fluid. At the same time, jammed valves can only be replaced or repaired.
3. The M, H type function spool valve did not change direction. Change them, readjust.
Second, the flow rate of Rexroth hydraulic pump is too small
It is a common problem of unstable flow of Rexroth hydraulic pumps, and there are many reasons.
1. The flow control device of the hydraulic pump of Rexroth hydraulic pump controls the pressure of Rexroth hydraulic pump too low. This can directly increase the flow control of the Rexroth hydraulic pump to the pressure of the Rexroth hydraulic pump.
2. The pressure of the relief valve or unloading valve that controls the flow of the hydraulic pump in the hydraulic pump is too low. It is sufficient to directly increase the pressure of the relief valve or unloading valve that controls the flow of Rexroth hydraulic pumps.
3. The bypass control valve of Rexroth hydraulic pump is not very tight. To replace the valve, or to check the route that regulates the flow of a Rexroth hydraulic pump.
4. Hydraulic pump, it can replace the hydraulic pump, such as variable vane pump, quantitative vane pump, double vane pump, internal gear pump, external gear pump and variable piston pump, and discharge the air inside the hydraulic pump.
5. The internal leakage of the hydraulic station is serious. This is mainly due to the fact that the various parts of the hydraulic pump station, namely the hydraulic pump, hydraulic valve, oil pipe, motor, oil block, oil tank, etc., are not connected and sealed at the same time.
6. The normal adjustment of the variable pump of Rexroth hydraulic pump is invalid. Replace this hydraulic pump.
7. Rexroth hydraulic pump pipeline loss is too much. This can change the large size tubing and increase the pressure of the pump on it.
8. Hydraulic pumps, hydraulic valves, wear and tear are repaired or replaced with these parts.
Thirdly, the flow rate of Rexroth hydraulic pumps is too large.
1. The flow control device of Rexroth hydraulic pump is too high. This is the opposite of what was said above, the pitch is too high and he can be lowered.
2. The normal adjustment of variable pumps (variable vane pumps, double variable vane pumps, and variable piston pumps) of hydraulic pump stations is invalid. Rexroth hydraulic pumps are designed to deviate, which can be replaced only or repaired.
3. The hydraulic pump model and motor speed are incorrect, and the hydraulic pump with the flow rate and the motor with the speed can reach are replaced.
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Rexroth hydraulic pumps - precautions for the use of hydraulic pumps
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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 solenoid valves consist of solenoid coils and magnetic cores, which are valve bodies with one or more holes. When the coil is energized or de-energized, the operation of the core causes the fluid to pass through the valve body or be cut off, changing the direction of the fluid. Electromagnetic components are composed of fixed cores, moving cores, coils and other components; ...
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Features of Rexroth hydraulic pumps:
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2) Coaxial structure, which can form a combined pump
3) Position-constrained backhaul structure
4) Spherical distribution, the plunger is arranged obliquely around the main axis
5) Stepless ...
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Rexroth inverter common faults and solutions
Power outage handling
If the power supply is instantaneously blacked out or the voltage drops to show "undervoltage", or the instantaneous overvoltage shows "overvoltage", it will cause the Rexroth inverter to trip and shut down, and it will be restarted only after the power supply returns to normal.
External fault handling
If you enter ...
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Rexroth oil lift piston pump parts repair method
1) If the cylinder body is inlaid with copper sleeve, it can be repaired by replacing the copper sleeve. First of all, trim the diameter of a set of plunger rods to a uniform size, and then polish the outer diameter with sandpaper of more than 1000#. There are three ways to install copper sleeves in the cylinder block: (a) Heating and hot charging of the cylinder block or low-temperature freezing and extrusion of the copper sleeve, interference ...
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How to select Rexroth solenoid valve and its selection points
1. Select the solenoid valve according to the pipeline parameters: diameter specification (i.e., DN) and interface mode
1. Determine the diameter (DN) size according to the inner diameter size or flow requirements of the on-site pipeline.
2. Interface mode, generally DN50 to choose flange interface, DN50 can be freely selected according to user needs...
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Rexroth Hydraulic Pumps – Types of Hydraulic Pumps and Their Advantages and Disadvantages
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 leakage.
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What causes Rexroth hydraulic pumps to heat up?
1. Poor assembly of Rexroth hydraulic pump leads to abnormal heating of the hydraulic pump
1. The courtyard of Litule hydraulic pump is not suitable, (for example, the plunger and cylinder, blade and rotor groove, sperm and rotor, gear, side plate, etc. are too small, and the sliding part may be overheated.) 2. The installation of Rexroth hydraulic pump ...
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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 ...
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Causes and analysis of the failure of Rexroth vane pumps
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Common problems and solutions of Rexroth hydraulic pumps
1. The pump does not absorb oil, the flow rate is not enough, the pump is empty, and the pump is damaged.
Damaged pumps, damaged skates or damaged ski and column ball joint seals; swash plate wear; wear of plungers and cylinder bores; failure of variable mechanisms; Wear of the oil distribution pan or wear of the oil distribution end face of the cylinder block; The LS valve of the pump is worn, the pressure is cut off...
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The purpose of using Rexroth proportional valves or servo valves
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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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What should be paid attention to in the maintenance of Rexroth oil pump?
1. Water will corrode the oil pump, so it is forbidden to use the oil pump to vacuum the substance containing water.
2. For substances containing a large amount of solvent, remove most of the solvent in the oven first, and then use an oil pump to vacuum.
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Rexroth hydraulic pump - common faults and solutions of hydraulic pumps
1. The hydraulic oil pump cannot absorb oil or have no pressure.
Causes
1. The rotation direction of the prime mover and the oil pump is inconsistent.
Cleaning method: correct the rotation direction of the prime mover.
2. The oil pump transmission key falls off.
Elimination: De novo transmission key.
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Technical Parameters:
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