Usually, this means a hydraulic pump combined of a motor to drive it. This article will focus on details about its composition, operational guidelines and areas where it is used.
Structure
A hydraulic motor pump unit generally consists of:
- Power source: This could be an internal combustion engine or any other mechanical energy source like an electric motor. It gives the rotational energy needed for driving the pump.
- Hydraulic Pump: A component linked directly or indirectly with the motor that converts its mechanical energy into hydraulic energy by causing fluid flow and pressure.
Working Mechanism
- Initiation: The process commences with the motor, which rotates when switched on.
- Fluid Movement: Hydraulic pumps are driven by shaft rotation. Depending on whether they are vane, piston or gear type pumps; these devices cause fluids to be drawn from reservoirs and pushed out under pressure.
- Energy Conversion: This combination works in such a way as to enable conversion of electrical or mechanical (motor) power into hydraulic energy (pump) through which pressurized hydraulic fluid is made available for use in a hydraulic system.
Applications
Hydraulic motor pump units are versatile and find applications in:
- Industrial Machinery: They supply power to various machines in factories including presses, molding machines and conveyors among others.
- Mobile Equipment: Used extensively in construction machinery as well as agricultural machinery among others for extension booms, lifting arms or steering purposes.
- Automotive Systems: In some cases, they can be employed in power steering systems as well as brakes systems.
- Aerospace: These may involve aircraft control surfaces’ movement or landing gear retraction operation by means of appropriate systems mounted therein.
- Marine: These vessels have them for tasks like steering engines or operating water-tight doors etc.
Distinction
Differentiating between the terms below is important:
- Hydraulic Motor : A device that converts back-to-mechanical-energy-converted-hydraulic-energy thereby giving motion;
- Hydraulic Pump : A device that converts mechanical energy to hydraulic energy producing fluid flow and pressure;
- Hydraulic Motor Pump (or Pump Unit) : A combined motor driving a hydraulic pump.
Conclusion
Many hydraulic systems have “hydraulic motor pump” or “motor pump unit” acting as their hearts through which pressurized hydraulic fluid is supplied. To effectively convert electrical or mechanical power into hydraulic power, both the driving motor and the hydraulic pump must be integrated into one unit. It is extremely useful in various fields and applications. Knowing the structure, working mechanism and unique role of this equipment in relation to the rest of hydraulics helps in understanding how it drives different processes based on hydraulically operated systems.
