18 Causes of High Power Consumption in Rexroth Hydraulic Pumps

Must often and Rexroth hydraulic pump contact users know it?

When the Rexroth hydraulic pump with motor power safety margin is calculated to be sufficient, but the actual operation of the motor due to overload and heat, which is caused by the pump consumes too much power.

But in the actual operation of the motor due to overload and heat, this is the pump consumes too much power.

This is caused by excessive power consumption of the pump.

XingYing Hydraulics has been engaged in the maintenance of Rexroth hydraulic pumps for many years.

Rexroth hydraulic pump power consumption may be caused by the following reasons are summarized as follows.

1, the pump speed is too high;

2，Tap the motor and try to see whether the motor steering is correct; 

3, the specific gravity of the transported liquid exceeds the original design value;

4, if you find that the multi-stage pump has an abnormal sound should be immediately stopped to check the cause;

5. The viscosity of the conveyed liquid is large;

6，If the multistage pump is out of service for a long time, the pump should be disassembled, dried, and the rotating parts and joints should be greased and installed;

7，Impeller size is too big;

8，When the multistage pump is to be stopped, close the gate valve and pressure gauge first, and then stop the motor;

9，The resistance of piping system exceeds or is insufficient to the predetermined value;

10，The head of the pump is too low and the flow rate is too high;

11, rotor parts and stator parts have friction;

12, bearing wear or damage to the mechanical seal on the seal seat pressure is too large;

13, Rupture of the outlet pipe;

14, Multi-stage pump in operation, the bearing temperature can not exceed the ambient temperature of 35C, the maximum temperature shall not exceed 80C; 15, pump shaft bending,

16，Uneven thermal expansion of different parts in the pump;

17, The power measuring instrument is not allowed; the pump balancing device does not work.

18, try to control the flow and head of multi-stage pump within the range indicated on the label to ensure that the multi-stage pump operates at the highest efficiency point in order to obtain the maximum energy-saving effect.

Translated with DeepL.com (free version)