constant flow gear pump

constant flow gear pump for hydraulic power steering systems

Constant flow gear pumps are able to provide a constant flow output through the integration of a constant flow relief valve, which is not affected by fluctuations in pump speed or engine speed.

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Description

Constant flow internal gear pumps play a vital role in hydraulic power systems requiring precise flow control, such as agricultural machinery and industrial vehicles. They integrate a constant flow relief valve, ensuring stable output regardless of speed or load changes—making them essential for applications demanding reliability and efficiency.

Working Principle

  1. Operates with a pair of meshing gears that drive liquid into the pump chamber and discharge it via gear action.
  2. Equipped with an internal constant flow relief valve that maintains a consistent output flow, automatically adjusting oil pressure to stabilize flow rate despite changes in speed or load.
  3. At high speeds, excess fluid is redirected back into the pump body; at low speeds, the relief valve ensures sufficient flow for hydraulic system demand.
  4. This design solves the instability problems of traditional gear pumps caused by speed fluctuations.

Main Applications

  1. Hydraulic power steering systems: Stable flow for precise steering in agricultural machinery, industrial vehicles, and engineering equipment.
  2. Hydraulic power systems: Reliable, efficient operation in forklifts, excavators, and other industrial vehicles.
  3. Full hydraulic steering systems: Consistent flow for directional control in systems under varying loads.
  4. Other hydraulic systems: Construction and mining machinery requiring high reliability and stability.

Technical Characteristics

  1. Stable flow output: Consistent flow regardless of rotational speed due to relief valve regulation.
  2. High-pressure capacity: Can withstand significant hydraulic loads, suitable for high-pressure systems.
  3. Flexible installation: Variety of inlet/outlet connections and mounting options for versatile system integration.
  4. High efficiency & energy saving: Reduces energy waste from unstable flow, optimizing system efficiency.

Advantages

  1. Constant flow: Guarantees stable system performance under all operating conditions, preventing failures and efficiency drops.
  2. High reliability: Built-in relief valve protects against overpressure, extending system life.
  3. High adaptability: Supports various hydraulic systems and installation requirements, offering flexible solutions.