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Micropump Cavity Style Pump Design & Suction Shoe Pump Design

Micropump External Gear Pumps

The majority of Micropump pumps fall into two categories:

  • Cavity style - which represents conventional gear pump technology
  • Suction shoe style - which represents a considerable modification

The suction shoe Design is a patented design and is exclusive to Micropump products

Gear Pumps - Cavity Style

  • The conventional cavity style pump seals the gear tips by placing the gears inside a cavity
  • The sides are sealed by placing the cavity plate between the pumpbody and the pump bearing plate MICROPUMP CAVITY SYLE GEAR PUMP
  • Two gasket-like seals are used between these three metal components


Cavity Style Pump - Exploded View

MICROPUMP CAVITY STYLE GEAR PUMP EXPLODED VIEW

Gear pumps - Suction Shoe
MICROPUMP CAVITY STYLE GEAR PUMP SUCTION SHOE

  • Suction shoe style gear pumps seal the gear tips by using only a portion of the cavity
  • The portion is called the Suction Shoe and seals only the minimum number of teeth (2)
  • The fluid is positively displaced in the same manner as the cavity style pump to the outlet

Gear pumps - Suction ShoeMICROPUMP CAVITY STYLE GEAR PUMP SUCTION SHOE

  • Like the cavity style pump, the sides of the gears are sealed on one side by the pump body
  • The other side is sealed only by the lip of the suction shoe

 Suction Shoe Style Pump - Exploded View

MICROPUMP CAVITY STYLE SUCTION SHOE EXPLODED VIEW