Rexroth Hydraulic Pumps – What are the advantages of electric proportional valves?

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 ...

Analysis of abnormal heating fault of vane pump: 1. The oil temperature is too high 2. The oil cat degree is too large and the internal leakage is too large 3. The working pressure is too high 4. The oil return port is directly connected to the pump population Abnormal heating elimination method of vane pump: 1. Improve the heat dissipation conditions of the fuel tank or use cooling ...

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 ...

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 ...

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. ...

1. Direct-acting relief valve How it works: The hydraulic force and the spring force are directly balanced to control the opening and closing action of the valve core, so as to ensure that the pressure of the oil inlet is basically constant. Peculiarity: (1) The hydraulic pressure of the valve core is balanced by the spring force, so when the system pressure is very high...

1. The speed and pressure of the pump should not exceed the specified value, and long-term use should be avoided, otherwise the life of the hydraulic pump will be affected. 2. When the hydraulic pump is started, it should be jogged several times, and after the oil flow direction and sound are normal, it should run under low pressure for 5-10min, and then put into normal operation. ...

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First wash. The first cleaning of the hydraulic system of the Rexroth Rexroth hydraulic pump is carried out after the pre-installation (trial assembly of the pipes) and the dismantling of the entire pipeline. The first cleaning should ensure that a large number of metal burrs and powders, sand dust, ...

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...

The flow rate of Rexroth Rexroth oil pump is the product of the gear pump displacement V per revolution and the speed n, if the speed n of the hydraulic pump is too low, the initial force Q will be too small, can not guarantee the oil supply of the system, resulting in the centripetal force is not enough or can not constitute a certain vacuum degree and can not absorb oil. ...

1. Close the gate valve before the pressure reducing valve, open the gate valve after the pressure reducing valve, and create a downstream low-pressure environment; 2. Rotate the adjusting screw counterclockwise to the upper position (relative to the low outlet pressure), and then close the gate valve after the pressure reducing valve; 3. Slowly open the gate valve in front of the pressure reducing valve ...

(1) HD (Hydraulic Variable) Type: Adjust the output torque and speed by controlling the swing angle of the motor block with external hydraulic oil. (2) HA (Pressure Variable) type: When the pressure reaches the set value, the motor changes the swing angle with the change of load, thereby changing the output torque and speed. Among them, the main one is constant pressure type (HA1) ...

1. According to the form of gear meshing, it can be divided into: external meshing and internal meshing 2. According to the tooth shape curve, it can be divided into: involute tooth form and cycloidal type 3. According to the form of the tooth surface, it can be divided into: spur gear type, helical gear type, herringbone gear type, arc tooth surface gear type 4. Press ...

1. There are two oil inlets and one oil return port for the pressure reducing valve and one-way pressure reduction connected by threads and flanges, and one oil inlet and one oil return port for one-way pressure reduction and one-way pressure reduction connected by plate connection. During installation, attention must be paid to connect the oil drain port directly back to the Rexroth hydraulic pump oil tank, and keep the oil drain circuit unblocked.

1) Cannot be opened or closed normally 1. Check the power supply and make sure the voltage and frequency are correct. Also check the connection. 2. Check whether there is dirt, corrosion underneath, and the coil will not burn out or lose components. 3. Check whether the flow direction is related to the indicator on the valve body or with the valve ...

Cause: There are two causes of particle contamination: one is brought in from the outside, and the other is generated during the work process. Atmospheric dust is brought in through the vents of the tank. Mixing during storage and transportation. Sludge and sediment resulting from chemical changes. Exist...

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.

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...

1) Swash plate axial piston variable pump for open hydraulic rotation circuit 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, ...