I: Gear pump definition and classification
(1) Definition of gear pump
Gear pump is an energy conversion device that converts the mechanical energy of the prime mover into the pressure energy of the hydraulic oil through the meshing of the gears.
(2) gear pump classification
External and internal meshing.
(3) Model of gear pump.
KCB , RCB , YCB/NYP
II: Structure of the external gear pump
External gear pump is mainly composed of the pump body, the meshing gear pair, the driving shaft, the driven shaft and the end cover of both ends.
Driving shaft extends out of the pump body, generally driven by the external motor rotation.
III: Working principle of the external gear pump
Three conditions for the work of hydraulic external stainless steel gear pump:
1: one or more closed working Spaces;
2: the confined working space can change periodically;
3: There is a flow distribution device coordinated with the confined space.
4: Gear separation, volume increases, vacuum and oil absorption.
5: gear meshing, volume is reduced, the oil is squeezed and pressed oil.
6: The meshing point moves along the meshing line to separate the two and play the role of flow distribution.
Structural characteristics of external gear pump
- Is the displacement adjustable? (Can variable output flow be easily obtained?)
- Can you work both ways? (Can bidirectional flow direction be easily obtained?)
- How large is the flow pulsation? (Can you get a steady output flow?)
- Is the radial force of the input shaft balanced? Can you work under high pressure?
Size of the flow pulsation
Flow pulsation of external gear pump is the largest, the more gear, the smaller the flow pulsation.
Whether the radial force of the input shaft is balanced
The radial force imbalance directly affects the further improvement of the working pressure, the external gear pump is generally low pressure hydraulic pump, the size of the rated pressure of the gear pump is small.