CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Vibratory System Piston Motor (Vibratory) Caterpillar


Piston Motor (Vibratory)
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CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Vibratory System [KENR3616]
HYDRAULIC SYSTEM
MOTOR GP
CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Vibratory System Piston Motor (Vibratory)



Illustration 1g00569643

Vibratory Motor

(1) Case drain. (2) Main loop (two ports).




Illustration 2g00569652

Components Of The Vibratory Motor

(3) Output shaft. (4) Motor housing. (5) Bearing. (6) Reaction plate. (7) Piston (one of nine). (8) Cylinder barrel. (9) Main circuit passage. (10) Head. (11) Cup. (12) Springs. (13) Piston shoe (one on each piston). (14) Port plate. (15) Main circuit passage.

Note: The versa vibe system uses a bent axis type motor.

The front vibratory motor and the rear vibratory motor are identical. The vibratory motors are a fixed displacement. Each motor is mounted on a side frame drum support. The vibratory mechanism is directly driven by the output shaft (3) .

The system is referred to as an open loop system. The system is an open loop system because there is no feedback link from the motors to the pump. Each motor receives oil from the variable displacement pump. The oil will then return to the hydraulic pump. This is called a closed circuit. The total definition is then called an open loop closed circuit system.

The motors receive oil from the pump. The motors are connected in a series when both drums are vibrating. When the machine is in the single drum mode the oil will bypass the motor which is not used.

Oil flows through the main circuit passages (9) and (15). The oil flow can be in either direction. A change to the direction of oil flow changes the direction of rotation of the cylinder barrel (8) and the output shaft (3) .

Oil flow from the vibratory pump goes to the main circuit passage (15) in head (10) through port plate (14) and into the cylinder barrel (8). Each piston (7) in cylinder barrel (8) is forced to extend under high oil pressure. Each piston will extend and this will force the piston shoe (13) against the reaction plate (6). The angle between the cylinder barrel (8) and the reaction plate (6) causes rotation of the rotating parts, cylinder barrel (8), pistons (7), and piston shoes (13), and the output shaft (3) .

When the rotation of the cylinder barrel (8) continues, pistons (7) retract in the cylinder barrel (8). There will be oil in front of the pistons (7). The oil is forced through the main circuit passage (9). Oil from the main circuit passage (9) flows into the hydraulic oil cooler. The hydraulic oil cooler returns oil to the hydraulic tank. Part of the oil inside the barrel assembly is used to lubricate all the moving parts.

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