pumppukone

Pumppukone is a device that provides hydraulic power by circulating a fluid through a system. In engineering, it is often called a hydraulic power unit (HPU) and serves as the source of flow and pressure for hydraulic components such as cylinders, motors and valves.

A typical pumppukone includes a pump driven by an electric motor or engine, a reservoir, filtration and cooling, a pressure-relief valve, and a control system. Some units incorporate manifolds, directional valves and accumulators. Designs may be stationary or mobile and vary in size.

Pumps fall into two main categories: positive-displacement types (gear, vane, piston) that create high pressure at modest flow, and centrifugal pumps that deliver higher flow at lower pressure. Units may operate in open-loop or closed-loop configurations and be powered by electricity, diesel, or other sources.

Operation involves starting the drive to circulate fluid, regulate pressure with relief devices, and monitor temperature and cleanliness to protect components. Modern pumppukone often include sensors and automation to adjust output to demand.

Applications span manufacturing, construction, mining, aerospace and process industries, where hydraulic power is needed to operate cylinders, motors and tooling. They can be fixed installations or modular, mobile units integrated into equipment.

Maintenance focuses on fluid quality and level, scheduled filter changes, leak checks, and cooling system upkeep. Safety measures include proper guarding, pressure relief, electrical safety, and compliance with relevant standards.

See also hydraulic power unit, hydraulic system, pump, hydraulic fluid.