Monthly Archives for December 2010

Electro-Hydraulic Stepping Motors

An electro-hydraulic stepper motor (EHSM) is a device, which uses a small electrical stepper motor to control the huge power available from a hydraulic motor (Figure 4.10). It consists of three components: 1. Electrical stepper motor 2. Hydraulic servo valve … Continue reading

22. December 2010 by Jack
Categories: Rotary Actuator | Tags: , | Leave a comment

Limited Rotation Hydraulic Motor

A limited rotation hydraulic motor provides a rotary output motion over a finite angle. This device produces a high instantaneous torque in either direction and requires only a small amount of space and simple mountings. Rotary motors consist of a … Continue reading

22. December 2010 by Jack
Categories: Rotary Actuator | Tags: , | Leave a comment

Swash Plate Inline Hydraulic Piston Pump

In this type, the axial reciprocating motion of the pistons is obtained by a swash plate that is either fixed or variable in its degree of angle. As the piston barrel assembly rotates, the pistons rotate around the shaft, with … Continue reading

22. December 2010 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , | Leave a comment

Hydrostatic Hydraulic Pumps

As the name implies, these pumps discharge a fixed quantity of oil per revolution of the pump shaft. In other words, they produce flow proportional to their displacement and rotor speed. A majority of the pumps used in fluid power … Continue reading

22. December 2010 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , | Leave a comment

Non-Positive Displacement Hydraulic Pumps

They are also known as hydro-dynamic pumps. In these pumps the pressure produced, is proportional to the rotor speed. In other words, the fluid is displaced and transferred using the inertia of the fluid in motion. These pumps are incapable … Continue reading

22. December 2010 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , , | Leave a comment

Hydraulic Pump Operation Principle

The sole purpose of a pump in a hydraulic system is to provide flow. A pump, which is the heart of a hydraulic system, converts mechanical energy, which is primarily rotational power from an electric motor or engine, into hydraulic … Continue reading

22. December 2010 by Jack
Categories: Hydraulic Pumps and Pressure Regulation | Tags: , | Leave a comment