New generation of mechanical power VARIATORS

New generation of

mechanical

power

VARIATORS

Implementation

Tractors

Agricultural machinery

Excavating machines

Cars, trucks and buses

Military machines

Load-lifting machines

Process equipment drives

Motor-variators

Power equipment

Mining equipment

Road-building machines

Working principle of a mechanical power variator

Main principle:

Point A fixing of the shaft

(a detail 2) in the necessary

time in a proper place with

moving possibility of

other points. Points O and M

are a spinning ax of the

input (a detail 3) and the output

(a detail 2) shafts accordingly.

Distance О-М (further “е”) is

The eccentricity of a variator

and also can change over

the range from 0 to еmax due

to the mutual crank twirls

(a detail 1) and the input shaft (a detail 3)

Transfer relationship of a variator I = (R+e)/e, where R – radius (distance M-N) output shaft pitch

line (a detail 2). Change of a transfer relationship i occurs at the expense of eccentricity change

е. At е=0 the variator output shaft is not twirled at any turns of the input shaft.

The offered principle provides unaccented fixing of a point A and an output shaft uniform

rotation.

е

O

M

Detail 2

Detail 3

А

Detail 1

N

Mechanical power variator’ working

principle demonstration

Transmissions’ characteristics

Works with the greatest efficiency only in separate points.

The characteristic of transmission with frictional variators Works effectively over the range speeds from Vmin to Vmax. Relation Vmax / Vmin = 3–6.

EFFICIENCY more low, than in a mechanical step transmission.

The characteristic of transmission with МPV Works effectively in a wide speed range. Vmax / Vmin is more than 1000.

Works effectively in a repent regime.

EFFICIENCY is commensurable with EFFICIENCY of a manual transmission.

The characteristic of mechanical transmission

Turns

Moment

The characteristic of ideal transmission

Areas of technical maintenance W kW

Ultrahigh more

than 500

High

100-500

Medium

10-100

Low

1-10

Ultralow less

than 1

Ultralow Low Medium High Ultrahigh

less than 10 10-200 200-3000 3000-10000 more than10000 N turns/min

Drive type

MPV

Hydraulic

Wedge-belt

Multidisc

Operational and technical advantages

Possibility of installation with engines of various power, including more

than 500 kW.

Effective work in a wide control range of speeds, Vmax / Vmin is more

1000.

Transferred twisting moment up to 100 кN*м.

High efficiency (92–95 %).

Possibility to work without the clutch.

Possibility of stable and long work on small target turns and the

maximum loadings (a repent regime).

Weight and size characteristics are in 1,5–2 times less than at comparable

multistage gear reductors.

High durability of work due to the minimum contact loadings (σk

≤ 15 kg/m2) on transferring elements of MPV.

Simple manufacturing methods.

Comparison МPV with other types of variators

Drive type

Parameter MPV Hydraulic Multidisc

Wedge-belt

Efficiency, % 92-95 75-87 85-89 84-88

Kinematic range, Vmax / Vmin 1000

and more 3 6 5

Comparative metal consumption, % 70 100 95 93

Expected fuel economy at using МPV in comparison with other types of

variators:

in a usual regime, % 5 – 8

in a repent regime, % 30 – 40

Technical data of a class 1.4 tractors' automatic

transmission controlled by МPV The maximum transferred power HP/кW 136/100

Nominal rotational speed of the input shaft, min-1 1700

Max rotational speed of the input shaft, min-1 less 2200

Rotational speed of the output shaft, min-1 more 2200

Min rotational speed of the output shaft, min-1 0

The maximum moment on the input shaft, Nм 600

The maximum moment on the output shaft, Nм 1700

Variator’s efficiency 0,94 – 0,96

Regulating of turns on the output shaft no-step, without rupture of a power stream

Variator’s control system drive automatic (possible transfer to manual regime) Size, mm, less than length 565 width 480 height 390 Weight, kg 155

Sample of experimental design of MPV

Tractor variator

Patent protection of МPV

Ukraine

Russia

Belorussia

China

Stand tests of MPV with automatic control

Machines and systems institute(IMIS)

г. Kharkov, Ukraine

Contacts

Association «Ukrainian innovation companies»

49000, Ukraine, Dnepropetrovsk

81, Karl Marks Ave

Tel/fax: +380 56 2 350080

web: www.auic.com.ua

e-mail: [email protected]

Contact person:

Vice president of the Association,

Dr. Alexander Pliskanovsky

mobile: +380 50 4801703

e-mail: [email protected]