Hydraulic Pump/Motor: Can it Work as a Motor? - Physics Forums
2015年4月14日 · A hydraulic motor may be designed for bi-directional operation. It can be operated with positive pressure on both ports. Bidirectional motors will have a third connection to drain fluid to the reservoir tank that leaks past the internal seals. Hydraulic motors and pumps might get to 90% efficiency.
Selecting hydraulic motors and a pump for hydrostatic transmission
2020年11月19日 · DC motors at front wheels, with a constant current, have fixed torque. Speed is not important. Hydraulic motors at front wheels, have constant pressure, so have fixed torque at any road speed. At maximum RPM, in top gear, pump must provide sufficient volume for motors at top road speed.
Can a Gear-Pump Be Used as a Motor for a Simple Steam Engine?
2007年7月10日 · Only the body casing (static) seals and the discharge port is good to the thousands of psi normally generated by a hydraulic gear pump. I had to have one modified with special seals just to handle 150 psi. It can be done, but a gear pump is a poor choice for an expander. I'd suggest looking into vane motors, also called air motors.
Calculating hydraulic motor sizes - Physics Forums
2011年10月19日 · The above calculation would be for the motor that is moving the log forward. There would actually be several hydraulic motors and cylinders as follows MOtors; 1.) To move log forward 2.) To run chainsaw 3.) To run a conveyor to remove wood once split Cylinders 1.) To split the wood 2.) Arm to hold the wood while being split 3.)
Two Pumps on one system flow question - Physics Forums
2016年12月7日 · I have a hydraulic system that uses two pumps. Each pump is capable of producing 22.5 gpm. With out taking into account the different valves, restrictors, and pipe sizing, my question is, does my gpm double to 45 gpm or stay at 22.5? the pumps are not in line with each other, just provide fluid flow and pressure to the same system.
Hydraulic gear pump ports and line sizing - Physics Forums
2015年11月14日 · The two main types of ports used in hydraulic gear pumps are inlet ports and outlet ports. The inlet ports bring in hydraulic fluid from the reservoir into the pump, while the outlet ports carry the pressurized fluid out of the pump to the rest of the hydraulic system. How do I determine the size of the ports for my hydraulic gear pump?
Electric motor - variable torque vs speed - Physics Forums
2024年8月22日 · Variable torque refers to the changing force the motor can exert, while variable speed indicates the motor's ability to adjust its rotational velocity. Motors can be categorized into constant torque and variable torque types, with applications ranging from fans and pumps to conveyors and elevators.
2 Symbols 2.1 Hydraulic actuation Balancing orifice can be fitted A B X T P 2.2 Electro-hydraulic actuation A B T X P 3 Technical data 3.1 Hydraulicy Size 08 Size 16 characteristics Inlet flow Q max 1) l/min 100 200 Nominal flow rate 2) l/min 25, 50, 75, 100 120, 160, 200 Operating pressure pmax bar 420 Pilot pressure p pmin.-- p pmax. bar 10 to 30
Where are the alternators in jet planes? - Physics Forums
2012年3月13日 · The variable speed drive is not in the pressurized part of the engine. There is usually a radial drive shaft (with a gear drive) between one of the engine rotors and a unit mounted on the outside of the engine casing. The constant speed drive would be inside the external unit. This also drives the engine fuel and oil pumps, etc.
Ans: Calculate Annual Savings with 93% Efficient Motors for AHU …
2015年5月4日 · All four pumps operate continuously for twenty four hours per day. The existing AHU fans are rated at 10hp with efficiency of 85%, existing condensing water pumps are rated at 60 hp with efficiency of 83%, existing chilled water pumps are rated at 75 hp with efficiency of 83% and existing CT fans are rated at 70 hp with efficiency of 80%.