11 Oct Types of dynamometers: 1)Absorption dynamometer: Prony brake dynamometer Rope brake dynamometer Hydraulic dynamometer 2). 20 Nov An improved power absorption device of the general Prony brake design is capable of either applying to a rotating shaft either a fixed force or a. 8 Mar Pony Brake is one of the simplest dynamometer for measuring power output ( brake power). It is to attempt to stop the engine by means of a.

Author: Fenrill Fejas
Country: Bolivia
Language: English (Spanish)
Genre: Music
Published (Last): 7 February 2018
Pages: 409
PDF File Size: 10.56 Mb
ePub File Size: 20.94 Mb
ISBN: 978-3-24731-111-8
Downloads: 21829
Price: Free* [*Free Regsitration Required]
Uploader: Vozuru

The first and second brake chambers 78, 86 operate in an identical manner and the following discussion will therefore be prlny primarily to describing the configuration and operation of first brake pony The actual scope of the invention is intended to be defined in the following claims when viewed in a proper perspective against the prior art.

The other end of tank 42 is rotationally positioned upon stationary support 58 in a manner dynzmometer in detail below. Stationary supports 56, 58 are rigidly affixed to support platform 64 by means of bolts 60, 62, respectively.

Seals are positioned between the inner portion of rear housing and sleeve to prevent the escape of liquid coolant from tank Contained between these trough partitions is a lubricant, which in a preferred embodiment of the present invention is a silicon compound.

Prony brake – Wikipedia

In addition, chain brke 20 may be utilized to drive a coolant pump not shown for circulating a liquid coolant in dynamometer 10 in providing heat dissipation therein proportional to the applied braking force. Coupling flange 74 is fixedly mounted on the right end of drive shaft 14 as viewed in FIG.

A skipping action can occur with the introduction of the lubricant between two smooth surfaces such as a smooth glazed brake lining and a smooth metal brake drum. Retrieved from ” https: Computer science, the study of computers, including their design architecture and their uses for computations,….

It is in this manner that the lubricating fluid is circulated within the pronj mechanism to provide lubrication between the contacting surfaces. A dynamometer as in claim 1 wherein said heat dissipating liquid is circulated through said housing in removing heat from said brake means and said drum produced by the frictional engagement therebetween. This negative pressure on the nonpressurized side of the impeller vane causes water to boil at a reduced temperature resulting in turbulence and a severe limitation on the impeller’s capacity to provide a continuous, constant load or create torque resistance.

Each piston is connected to a hydraulic control line which, in turn, is coupled to the stator hydraulic control line The water impeller type of dynamometer requires a fixed amount of water usage which cannot be improved due to the formation of steam pockets on the receding edge of the impeller vanes.

The degree of retarding action is dictated by the force with which this frictional contact is applied. Keep Exploring Britannica Computer science. A friction band is wrapped around half the drum’s circumference and each end attached to a separate spring balance. When the engine is running, the frictional force between the drum and the porny will increase the force reading on one balance and decrease it on the other.

Included in first and second brake chambers 78, 86 are stator shafts 98,respectively, which are aligned with drive shaft The resulting heat build-up is transferred through the finned, high-heat transfer lateral dyna,ometer of the drum to water in a tank in which the rotating drum is located. The drum is sealed to prevent the loss of lubricant therefrom as well as water contamination therein while the level of lubricant in the brake cell is easily checked by visual means.

In the circulating lubrication system the lubricant is temporarily “trapped” away from the heated surfaces and then allowed to flow into the internal parts of the brake unit. Provision is also made for the continuous filtering of the lubricant for the removal of displaced friction material therefrom.

Prony Brake Dynamometer (with Weights)

The fibrous character of the frictional brake linings in dynamometr brake chamber permits the lubricant to flow therethrough and be filtered thereby. A portion of the circulating lubricant is always confined between trough partitions where it is not in contact with a heated surface and thus undergoes a reduction ptony temperature.

A Prony brake generally includes a rotating brake drum or disc connected with the output shaft of a prime mover, such as an internal combustion engine, and stationary friction pads or brake shoes that are engageable with the drum or disc in applying a retarding force thereto by frictional contact. Brake lining is preferably a fibrous material having a high coefficient of friction.

Thus, drive shaft 14 rotates in response to the rotation of universal yoke 12 by virtue of the shaft coupling provided by linked outer and inner flanges 15, 16 and their respective shaft keying elements.

The brake assembly is enclosed in a sealed drum coupled to a rotating shaft and rotationally displaced thereby within a water-filled tank.

Prony brake dynamometer – WARSAW; ARTHUR J.

The disclosure of U. Lubricating system for wet clutches. The operation of dynamometer 10 will now be described with reference to FIGS. An improved power absorption device of the general Prony brake design is capable of either applying to a rotating shaft either a fixed force or a force proportional to its rotational speed or for measuring mechanical power transferred to a rotating shaft by a prime mover.

In addition, the metallic impeller is subject to erosion in the form of sublimation due to the formation of these steam pockets on the dymamometer vanes. Friction engaging surfaces positioned within the drum adjacent to its lateral surface are displaced radially projy by means of a plurality of opposed, hydraulically-actuated brake shoes symmetrically positioned about the axis of rotation.

A dynamometer designed on the same limited operational basis as an automobile brake would be a design failure.