YP Series Hydraulic Dynamometer

The hydraulic dynamometer operates based on the principles of fluid friction and eddy current braking.

The basic structure: Its main components are a rotating rotor (installed on the input shaft) and a fixed stator (housing). Both the rotor and stator are provided with several perforated blades or grooves, which maintain a tiny gap between each other but do not come into contact.

The working process: Water is injected into the dynamometer to fill the space between the rotor and the stator. When the prime mover drives the rotor to rotate, the rotor transfers kinetic energy to the water.

Under the action of centrifugal force, water is thrown towards the inner wall of the stator housing, forming a strong vortex. Huge fluid friction and impact occur between water and the rotor blades, the inner wall of the stator, and water molecules, converting mechanical energy into thermal energy. This frictional resistance exerts a braking torque (i.e., braking torque) on the rotor, which is equal to and in the opposite direction to the torque output by the engine.

Torque measurement: According to Newton's third Law (Action and reaction), the torque acting on the rotor will act on the stator housing in the form of a counter-torque of equal magnitude and opposite direction. The stator housing is not completely fixed but is supported on the force sensor (such as a pressure sensor or scale) by a force arm.

By measuring the force F on this lever arm and the known length L of the lever arm, the torque T can be calculated: Torque T = Force F × lever arm Length L. Power calculation: After measuring the torque T and the rotational speed n, the power P of the measured machinery can be calculated. Power P = (2π × T × n) / 60 (where P is in watts (W), T is in Newton-meters (N·m), and n is revolutions per minute (r/min)). The more commonly used units are kilowatts (kW) or horsepower (PS/hp).

The basic model of this product is designed for unidirectional testing. If users need to conduct bidirectional tests simultaneously, please specify your requirements when placing an order, and our company will provide specialized customization.

The testing process can be manually or automatically loaded. The test results can be generated into customized test reports, curve charts, etc. The process data can be generated into Word, Excel or PDF format files, and the data can be saved, edited, printed, etc. The interface of the test system is simple and clean, and it is convenient to upgrade and maintain. The company offers free training for operators and provides guidance on usage and maintenance.

Specific test items can be negotiated or customized by both parties. For technical support, please call 400-111-3688.