2012年7月21日星期六

The role, structure and working principle of the forklift truck fuel pump


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1, the fuel pump of the role: to gasoline from the tank sucked out and pumped to the carburetor float chamber.

2, the fuel pump structure: mechan ical drive of the diaphragm, mounted on one side of the engine crankcase,

camshaft by the valve train eccentric wheel drive. Pump divided into upper body and lower body, upper body

with zinc alloy die-casting into the inlet valve and outlet valve cover and the upper body of the occlusal

surface folder pad, resorted to the oil chamber closed. Coated with oil resistant rubber cloth plasma membrane

pieces, screw clamp between the upper body and lower body, attachment skid stee r
is formed above the pump oil chamber. Diaphragm and

to support the market with nut locking the upper end of the lever and the diaphragm spring is arched upward,

the lower side of the spring seat is equipped with oil seals, anti-diaphragm rupture gasoline and leakage.

Within the rocker arm of the hook at one end inserted in the rod side holes, the other with the outer rocker

bevel contact, and with the suit in the rocker shaft, one end of the shaft is equipped with a hand rocker arm

is used to manually pump oil.

3, How it works: the engine is running, When eccentric convex tip to promote placed on the outside rocker,

that is driven within the rocker arm and through the rod to the diaphragm downstream, so the pump oil chamber

volume increases, pressure drop, the oil The valve is closed, the inlet valve is sucked open,forklift clamp attachments
gasoline begins

with the inlet pipe into the pump oil chamber. Eccentric convex tip to leave the outer rocker outside rocker

return spring next time position, within the rocker arm from the outside rocker driven diaphragm is arched up

in the spring under, so the pump oil chamber volume reduction small rise in oil pressure to close the inlet

valve, open the outlet valve, gasoline carburetor flowlines input. When without oil, due to the float chamber

needle valve closed, indoor resistance of the oil will be more than a stretch of the diaphragm spring, the

diaphragm down to the lowest position, pumping will be stopped completely. Before starting the engine, if the

float chamber without oil or oi l remaining is too small, you can flip the hand Rocker pump oil. Hand rocker

when the float chamber is full of petrol, will form an empty move, pumping stops.

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