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375 SE
800-00162
This selective application of pressure maintains the vane in substantially constant radial hydraulic balance in all positions.
Vane tip wear is compensated for automatically. As the vane wears, pressure moves the vane farther out in the rotor
slot holding the vane tip against the cam ring.
C. HYDRAULIC BALANCE
C. HYDRAULIC BALANCE
C. HYDRAULIC BALANCE
C. HYDRAULIC BALANCE
C. HYDRAULIC BALANCE
The pump ring is shaped so the two pumping chambers are formed 180 degrees apart (Figure 2). Thus, opposing
hydraulic forces which develop side loads on the shaft, cancel out.
D. FLEX SIDE PLATE OPERATION
D. FLEX SIDE PLATE OPERATION
D. FLEX SIDE PLATE OPERATION
D. FLEX SIDE PLATE OPERATION
D. FLEX SIDE PLATE OPERATION
The flex side plates for both inlet and outlet are symmetrical. Pressure is fed behind each side plate into two kidney shaped
cavities which are sealed by special seal packs.
The two flex side plates and their associated kidney shaped cavities function in the following manner. As pressure builds
up in the outlet, pressure also builds up in the cavities. The pressure in the cavities hold the flex side plates in hydrostatic
balance against the rotor and provide optimum running clearances for minimum internal leakage and minimum friction.
(See Figure 4).
The flex side plates also provide passages for feeding under vane pressure to the space between the vane and insert.
The bronze faces of the flex side plates ride next to the rotor and provide excellent wear and cold start characteristics.
The inlet and outlet support plates hold the flex side plates in position and contain passages which allow fluid to pass from
the inlet to the pumping cartridge and from the cartridge to the outlet port.
E. INLET BODIES
E. INLET BODIES
E. INLET BODIES
E. INLET BODIES
E. INLET BODIES
Two inlet body configurations and two shaft seal arrangements are available in this pump series. See Fig. 5a,b.
When a single shaft seal is used, a steel ball is pressed into the body. (See Figure 5a).
SINGLE PUMP MAINTENANCE CONTINUED...
FLEX SIDE PLATE OPERATIONS
FLEX SIDE PLATE OPERATIONS
FLEX SIDE PLATE OPERATIONS
FLEX SIDE PLATE OPERATIONS
FLEX SIDE PLATE OPERATIONS
FIGURE
FIGURE
FIGURE
FIGURE
FIGURE
4
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