Coolant pump device (VAZ-2109)

The coolant pump is centrifugal and serves to ensure its circulation in the cooling system. Housing 2 (figure 32) the pump is made of an aluminum alloy, the shaft 5 is installed in a double-row ball bearing 8, which is locked in the housing with a screw 1. To prevent the screw from loosening, the contours of its socket are peened after assembly. The bearing is without an internal race, the role of the race is performed by the pump shaft. During assembly, the bearing is filled with Litol-24 grease and does not need to be replenished with grease. A toothed pulley 9 is pressed onto the front end of the shaft, and an impeller 4 is pressed onto the rear end. The toothed pulley is made of a metal-ceramic composition.



The thrust sealing ring 6 of the gland, made of graphite composition, is pressed against the impeller end face, hardened by high-frequency currents to a depth of 2... 3 mm. The gland is non-separable, pressed into the pump body and prevents leakage of coolant. In case of liquid passing through a damaged gland, there is a drain hole in the body under the bearing for its drainage.



To relieve the axial load from the shaft, two holes are made in the impeller, which connect the cavities on both sides of the impeller and equalize the pressure of the coolant on the impeller in these cavities.

The material is posted on the website: VAZBOOK.RU