Improved Dynamometer

a dynamometer and dynamometer technology, applied in the field of improved dynamometers, can solve the problems of sanding holes, impurities and imperfections suspended in casting, and high cost of wooden patterns or aluminum match plates required to make molds,

Active Publication Date: 2021-10-21
DYNO TECH SERVICES LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes various devices for measuring mechanical force and absorbing power in a prime mover. These devices include a cooling tank with a rotatable cylindrical drum body, a stator body, and a hydraulic pressure conduit. The stator body has a first and second actuation ring, and the friction disks are moveable between a retracted position and an extended position. The hydraulic pressure conduit is in fluidic communication with the first and second channels. The actuation rings can be hydraulically actuated by the hydraulic fluid. The technical effects of these devices include improved accuracy in measuring mechanical force and power, as well as improved responsiveness and control.

Problems solved by technology

For example, wooden patterns or aluminum match plates required to make the mold are expensive and require maintenance from time to time.
Further, this type of casting process results in impurities and imperfections being suspended in the casting.
Other disadvantages include sand holes, gas holes, and hard spots within the casting.
Such impurities and imperfections at the point of friction can reduce friction material operating lifetime, as well as the life of the brake drum.
Water, oil and friction brakes do not mix very well.
Should the brake experience water infiltration, it will go through rapid changes in its coefficient of friction, causing the unit to severely vibrate.
Yet another disadvantage is that servicing and repair of Prony brakes is typically invasive and time-consuming.
A further disadvantage of most known Prony brakes is the internal stationary stator, which has radially extendable friction pads that create mechanical friction by extending radially until the pads contact the inner surface of the circumferential wall of the brake drum.
Such a radially extending stator typically requires a complex design with multiple pistons and / or brake assemblies.
In addition, the interaction of the radially extending piston brake and the rotating brake drum can result in a rocking action between the stator body and the piston brake, which can damage the Prony brake.

Method used

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Examples

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Embodiment Construction

[0046]The various dynamometer device embodiments disclosed or contemplated herein have a rotating brake drum, a stationary stator body disposed therein, and opposing axially-extending friction pads moveable coupled to the stator body such that a first friction pad is contactable with a first base of the drum and the second friction pad is contactable with a second base of the drum.

[0047]FIGS. 1A and 1B depict a dynamometer device 10 according to one embodiment, with FIG. 1A depicting a rear view of the device 10 and FIG. 1B depicting a side view. The device 10 has a tank 12 that is made up of two reservoirs: a first (or primary) cooling reservoir 14 and a second (or secondary) cooling reservoir 16. Further, the device 10 has a rotatable drum body 18 disposed within the first reservoir 14. The two reservoirs 14, 16 are coupled via a flexible coupling collar 20 that couples the two reservoirs 14, 16 at a neck 22 such that the two reservoirs 14, 16 are in fluidic communication via the ...

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Abstract

Disclosed herein are various dynamometer embodiments in which the devices have a cooling tank comprising cooling fluid, a rotatable drum body disposed over a stator body, and first and second friction disks axially extendable from the stator body such that the friction disks are frictionally engageable with the bases of the drum body. The bases of the drum body can be rotatable friction plates that are coupled via a connection tube to form the drum body.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority as a continuation of U.S. patent application Ser. No. 16 / 850,147, filed Apr. 16, 2020 and entitled “Improved Dynamometer,” which is hereby incorporated herein by reference in its entirety.FIELD[0002]The various embodiments herein relate to devices for measuring mechanical force and / or absorbing power of a prime mover, such as, for example, an internal combustion engine.BACKGROUND[0003]A dynamometer is a device for measuring mechanical force, or power, transmitted by a rotating shaft. Amongst the various types are “absorption dynamometers,” which produce the torque they measure by creating a constant restraint to the turning of a shaft by mechanical friction, fluid friction, or electromagnetic induction.[0004]A “Prony brake” is an absorption dynamometer that produces mechanical friction. It generally includes a rotating brake drum or disc connected with the output shaft of a prime mover, such as an intern...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G01L3/20G01L3/18
CPCG01L3/20G01L3/18
InventorWARSAW, AARON
OwnerDYNO TECH SERVICES LLC