Hydraulic Power Unit
Hydraulic power units are very essential in any hydraulic system. Hydraulic systems use hydraulic fluids to transfer force, power, energy from one source to another, which in turn create motion (rotary or linear) or force. Hydraulic power units are used to provide the pressure or force that drives hydraulic cylinders, motors and other complementary parts of a hydraulic system. The industrial hydraulic power units are of great use in heavy industrial machines. Manufacturers, suppliers of hydraulic power units have come up with various designs, depending on the application areas. Portable hydraulic power units are very popular. Hydraulic power units are given on rentals too. Used hydraulic power units are also demanded in the market.
Hydraulic power units (HPU) are not similar to pumps. Hydraulic power packs make use of temperature control devices and use multi-stage pressurization networks to transfer liquid. There is
fluid reservoir, multiple pump stages and coolers to keep fluid at a safe working temperature in HPUs. Various parameters like physical features, mechanical characteristics and performance specifications need to be considered when selecting hydraulic power units. They indicate the type of projects for which the hydraulic power units can be effective.
Performance Specifications of Hydraulic Power Packs
- Operating pressure: This is the pressure that the HPU can deliver at the outlet. The power unit is either single pressure rating or rated over a pressure range.
- Flow: The fluid flow may be a single rating, or have high and low rating points.
- Total power: This refers to total amount of power that is required to operate.
- Reservoir capacity: Some hydraulic power units have multiple power sources. Reservoir capacity refers to the power available from all sources. The power capacity in the reservoir is measured in gallons or similar units.
Hydraulic Power Unit Design: Physical Features
A large, durable hydraulic power unit is designed in such a way that it can function under various environmental conditions. Some of the standard design features include:
- Accumulators: They collect water from the pumping mechanism and maintain fluid pressure.
- Motor Pumps: A hydraulic power unit has single motor pump or multiple motor pumps , where only one operates at a time.
- Tanks: The tank is a storage unit. It has enough capacity to hold the fluid in the pipes to drain into it. Filters: A filter is is a self-contained bypass unit, with its own motor, pump, and filtering apparatus, installed on the top of the tank. It can be used to fill or empty the tank.
- Coolers and Heaters: As a part of the temperature regulation process, an air cooler is used to prevent temperatures from rising above operational parameters. There is also a heating system, which can elevate temperatures when necessary.
- Power Unit Controllers: The hydraulic controller unit is the operator interface which consists of displays, power switches, and monitoring features. It is necessary for installing and integrating a power unit into a hydraulic system.
