Hydraulic pump & actuator Flashcards
actuator with linear force
cylinder
actuator delivers torque
motor
telescopic cylinders only have seals in this location
cylinder casing
end where drain port is located in spring return single acting cylinder
spring end (rod end)
cylinder with 2 pistons delivers big force with short stroke
tandem cylinder
for application in which load can force the piston to hit the end of the cylinder
cylinder cushion
end where cushion needle valve should not be completely closed off
rod end
metal collar that fits over the piston rod , to minimize side load
stop tubes
threads engage on the tooth side
NPT
threads engage on tooth root
NPTF
provides a way for you to remove trapped air from a cylinder when the main port connection are at the bottom
bleed ports
part of cylinders needs to passed when using a proximity switch
cushion collar
LSHT types include
radial piston
cam type radial piston
roller vane gerotor
HSLT types include
in line piston
bent axis piston
vane
gear
motors modified to allow the motor to turn only part of a revolution
limited rotation motor
the amount of fluid required to turn the output shaft one revolution
displacement
the rotational force of a motor
torque
torque depends on the 3
inlet pressure
surface area of the motor element
radius of rotation
speed is determined by 2 factors
flow rate
volume
pressure is determined by the 2 factors
load
displacement
effieciency of gear motor ran at half speed
75-80%
effieciency of gear motor ran at full speed
85%
3 types of internal gear motor
direct drive
orbiting gear
roller vane gerotors
