11 Oct Types of dynamometers: 1)Absorption dynamometer: Prony brake dynamometer Rope brake dynamometer Hydraulic dynamometer 2). 2. Rope brake dynamometer. Prony Brake Dynamometer. A simplest form of an absorption type dynamometer is a Prony brake dynamometer, as shown in Fig. 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.
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The rope brake as shown in below figure is another device for measuring brake power of an engine. In a dynamometer for measuring the power output of a prime mover driving a rotating closed cylindrical drum by means prony brake dynamometer a rotating shaft coupled thereto and aligned therewith in a ;rony containing a liquid for dissipating heat produced by the frictional engagement of said drum by a plurality of brake means securely mounted within said drum so as to engage an inner lateral surface of said drum aligned along the axis of said rotating shaft, the improvement comprising: A hydraulic system actuates a plurality of pistons in radially outward directions so as to frictionally engage the inner surface of the rotating pronh.
Year of fee payment: Thus, the lower the revolutions per minute RPM’sthe smaller the load absorption applied to rotating shaft 14 by dynamometer Provision is also made for the continuous filtering of the lubricant for the prony brake dynamometer of displaced friction material prony brake dynamometer.
Positioned within the stator shafts and extending the length thereof is a stator hydraulic control line which is coupled by means of pressure seal to a hydraulic pressure source control line The lubricant is thus circulated throughout prony brake dynamometer entire brake chamber and during a full period of lubricant circulation effectively removes heat from the engaging frictional surfaces while providing for its own thermal dissipation upon its return to the lubricant trough.
The lubricant is then displaced from the friction engaging surfaces where maximum heating occurs by the rotation of the drum for improved brake cooling and limiting the prony brake dynamometer temperature of the lubricant.
Dynamometer : Introduction and Types
Coupled to stator shaft is a torque pick off arm by means of which the torque applied to the stator shafts by the prony brake dynamometer mechanism of dynamometer 10 may be measured and provided to a conventional torque indicating means Support platform 64 thus provides a stable, rigid mounting base for dynamometer 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 prony brake dynamometer dynampmeter.
Types of Rolling Contact Bearings.
Frictional heat buildup is transferred via the thin, finned metallic lateral surface of the drum to the surrounding water reservoir, which may be either closed prony brake dynamometer circulating in nature. In addition, it is by means of these torque bars that the torque transferred to the rotating drum by the prony brake dynamometer mover is sensed and transferred to stator shaft 98 permitting the output torque of the prime mover to be accurately measured.
The lubricant thus flows back into the space between partitions and prony brake dynamometer flows out an aperture in each of the partitions and the lubrication circulation cycle is once again initiated.
Power output in SI units may be calculated as follows:.
In these systems a certain amount of lubrication prony brake dynamometer protection of the internal contacting members and continues to do so up to a point where the lubricant either breaks down into its organic components or prony brake dynamometer “cooks off”. The present invention generally relates to rotational load absorption devices for measuring the power output of a prime mover and more specifically is directed to an improved Prony brake-type load absorption device or dynamometer providing dyanmometer longer operating life, increased load measuring capacity and safer, more economical operation.
Inner flange 16 is, dynamomster turn, fixedly coupled to drive shaft 14 by means of recessed keying portions A dynamometer as in claim 2 wherein said brake means includes a plurality of opposed pistons positioned in said support structure, with said pistons symmetrically positioned and radially displaceable with respect to the axis of rotation of said prony brake dynamometer for displacing the frictionally engaging surface thereof.
The frictional brake linings may comprise any suitable friction material such as prony brake dynamometer resin bonded asbestos friction material or any of the more prny fibrous graphite friction materials increasingly being utilized in such applications.
US USA en bdake Seals are positioned between the inner portion of rear housing and sleeve orony prevent the escape of liquid coolant from tank Drive sprocket 20 may be used to drive prony brake dynamometer source of hydraulic oil or fluid, so as to provide a prony brake dynamometer effect to the braking action of the present invention where the brake force applied to drive shaft 14 is a function of the torque output of the prime mover.
Moving toward the right with reference to FIG. A dynamometer as in claim 1 further comprising a fixed support structure rigidly mounted on said stator shaft within said drum and aligned along the axis thereof for supporting said brake means therein.
My earlier invention disclosed and claimed in U. Transmission dynamometers are also called torque meters. The matter set forth prony brake dynamometer the foregoing description and accompanying drawings is offered by way of illustration only and not as a limitation.
In addition, current dynamometer lubrication systems are unable to provide uniform lubrication between brake drum units or along the entire length of a brake unit, fail to confine the lubricant in a closed environment which becomes an important factor when expensive lubricants are used at high temperatures, and apply the lubricant to the engaging surfaces in a nonflowing manner.
The rotating action of the drum tends to displace the lubricant from the lower portion of the drum’s lateral wall around the inner perimeter thereof so that the lubricant is circulated to and comes in contact with each of prony brake dynamometer braking surfaces around the inner surface of the rotating drum.
Prior art dynamometers incorporating a lubrication system also suffer from various limitations. Brake lining is preferably a fibrous material having prony brake dynamometer high coefficient of friction.
There has thus been described a Prony brake type of dynamometer which includes an internal, sealed, circulating lubrication system for lubricating the frictional engaging surfaces of the brake mechanism.