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.
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.
Can a Gear-Pump Be Used as a Motor for a Simple Steam Engine?
2007年7月10日 · Some gear-pumps also have variable speed drives that allow for precise speed control. What types of applications are gear-pump motors commonly used for? Gear-pump motors are commonly used in various industrial and commercial applications, such as in hydraulic systems, lubrication systems, and chemical processing.
How Does a Hydraulic Motor Function in a System? - Physics Forums
2010年10月31日 · In summary, hydraulic motors work by using fluid under pressure to push against vanes attached to a shaft, causing it to rotate. This fluid is then drained and returned to the pump that pressurized it. Hydraulic pumps work in a similar way, except they use a shaft with vanes to push fluid out under pressure.
Calculating hydraulic motor sizes - Physics Forums
2011年10月18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?
Understanding Variable Pitch Fans: Get Help Here - Physics Forums
2006年9月15日 · In summary, variable pitch blade systems for fans/turbines involve the use of a hydraulic piston to push and pull the rotor, which is connected to lever arms that rotate the blades in an outer hub assembly. This changes the pitch of …
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%.
Derivation of formula for pump power - Physics Forums
2011年10月14日 · Yes, the pump power formula can be used for all types of pumps as long as the flow rate, head, fluid density, and gravitational acceleration are accurately measured. However, the efficiency of different types of pumps may vary, so it is important to use the appropriate efficiency factor when calculating pump power for specific pump types.