How do I choose a hydraulic motor?
Table of Contents
How do I choose a hydraulic motor?
Proper hydraulic motor selection starts with the expected performance required by the application, then works back to the prime mover—the pump. Then it is necessary to evaluate the cost of your motor options along with the degree of complexity you want for the overall system.
How do you determine the size of an electric motor to run a hydraulic pump?
1 HP is required for each 1 GPM at 1500 PSI or any multiple of 1500 such as 3 GPM at 500 PSI, 2 GPM at 750 PSI, 1/2 GPM at 3000 PSI, etc. Another handy rule-of-thumb is that it takes about 5\% of the pump maximum rated HP to drive the pump when unloaded and pressure is very low.
How do you size a hydraulic power pack?
“A general rule of thumb used in sizing a hydraulic reservoir is three to five times the per-minute flow rate.” ISO 4413 is the main industry standard describing best practices of design for hydraulic systems.
How do you choose an electric motor for a hydraulic pump?
If you calculate 20 GPM @ 300 PSI with an assumed overall efficiency of 89\%, you would probably select a 5 Hp electric motor. However, if you calculate the same 20 GPM @ 300 PSI with the actual overall efficiency of 50\%, you would know that you should be using a 7.5 Hp motor.
What type of hydraulic motor is most efficient?
Radial piston motors
Radial piston motors are extremely efficient and rated for relatively high torque. In many USACE sector gate drives radial piston hydraulic motors are used. The hydraulic motor shown in Fig. 11.23 is a radial piston type and provides a torque of 260 Nm/bar.
Can I use a hydraulic pump as a motor?
A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation). However, many hydraulic pumps cannot be used as hydraulic motors because they cannot be backdriven.
How do you size an electric motor?
Divide the motor speed by the required speed and round down to get a starting gear ratio. Then divide the required torque by the gear ratio to find the newly required torque. This will help you narrow the choices down to a few select motors.
How much horsepower do you need to run a hydraulic pump?
Calculate your Hydraulic (Fluid Power) Horsepower Rules-Of-Thumb: Horsepower for driving a pump: For every 1 HP of drive, the equivalent of 1 GPM @ 1500 PSI can be produced. Horsepower for idling a pump: To idle a pump when it is unloaded will require about 5\% of its full rated horsepower.
How do I choose a hydraulic system?
Here are some features you should consider when purchasing one:
- Hydraulic Fluid Viscosity. Fluid viscosity refers to the thickness of the liquid in your pump.
- Fluid Type.
- Flow Rate.
- Power Curves/Torque Ratings.
- Speed.
- Max Operating Pressure.
- Fixed Displacement Vs.
- Maintenance Time and Costs.
Which pump is used in hydraulic power pack?
When a hydraulic power unit begins functioning, the gear pump pulls hydraulic fluid out of the tank and moves it into an accumulator. This process continues until the pressure within the accumulator reaches a predetermined level, at which point a charging valve switches the pumping action to begin circulating fluid.
How do I choose a pump motor?
When choosing a motor for a centrifugal pump, you must consider the impeller size, maximum capacity, specific gravity of the fluid, and service application in case API requirements apply. If you take these things into account, you will select the right motor for your centrifugal pump application.
How do you size a pump motor?
The power required to drive the pump at the rated design condition should always be less than the nameplate horsepower rating of the motor. So if the pump will require 4.5 HP at the design condition, at a minimum, the motor should be sized for 5 HP – the next nominal size above 4.5 HP.