problem operating 2 geared motors at the same time with one hyd pump
problem operating 2 geared motors at the same time with one hyd pump
(OP)
i installed one hydraulic pump fixed displacement 25 gal/min.two motor spool v20 sectional valve bank .the motors must run independently w flow controles. the lift motor is rated at 16 gpm has 1" ports and 1/2"case drain.the flowcontrole for this motor has 3 3/4" ports.
the shaker motor rated at 6 gal/min has 3/4"ports and the flow controle has 3 1/2" ports.
the problem im having is when i run the two motors at the same time the shaker motor works great on #3 on flowcontrole however the lift motor runs les than half even with the flow control on all the wayand heres the wierd thing when i turn up the shaker motor the lift motor goes faster too. am i just missing something here?
any help would be greatly apreciated.
the shaker motor rated at 6 gal/min has 3/4"ports and the flow controle has 3 1/2" ports.
the problem im having is when i run the two motors at the same time the shaker motor works great on #3 on flowcontrole however the lift motor runs les than half even with the flow control on all the wayand heres the wierd thing when i turn up the shaker motor the lift motor goes faster too. am i just missing something here?
any help would be greatly apreciated.
RE: problem operating 2 geared motors at the same time with one hyd pump
When you increase the flow to the shaker motor the pressure rises also pushing more flow to the lift motor.
Where are the flow controls in the circuit? Before or after the directional valves?
You would be better off with a tandem pump. One side for the shaker and one side for the lift. Split the pump, not the flow.
Ted
RE: problem operating 2 geared motors at the same time with one hyd pump
Parallel Connections are more efficient only when load on each motor is same. Raising the pressure on one motor cause the other one less efficient & may disrupt the speed relation. you can increase the system pressure to increase torque of highest pressure motor. How about connecting both the motors in series. speed of the motors can be controlled by bleed-off flow contol valve & torque can be adjusted by relief valves.
RE: problem operating 2 geared motors at the same time with one hyd pump
Do not manage motor torque with a relief valve. Permit the system to deliver what the motors require at the flows delivered to the motors.
Use relief valves only to protect system components.
Bleeding off flow from an upstream motor will deprive the downstream motor of flow that may be required to reach desired speed.
Ted
RE: problem operating 2 geared motors at the same time with one hyd pump
kiran
these need to be independently controled the motors have two totally different loads and operate at different rpms so series is out of the question
RE: problem operating 2 geared motors at the same time with one hyd pump
Alternatively, you can use a rotary flow splitter between the single pump and separate directional valves. For about the same money as the rotary gear splitter you could just get a tandem pump to replace the single pump.
Ted