New generation of mechanical power VARIATORS
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Transcript of New generation of mechanical power VARIATORS
New generation ofNew generation ofmechanicalmechanical
powerpower
VARIATORSVARIATORS
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 variatorWorking 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
Transmissions’ characteristicsTransmissions’ characteristics
Works with the greatest efficiency only in separate points.
The characteristic of transmission with frictional variatorsWorks 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 МPVWorks 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 maintenanceAreas of technical maintenance W kW
Ultrahigh more than 500
High100-500
Medium10-100
Low1-10
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 variatorsComparison МPV with other types of variators
Drive typeParameter
MPV Hydraulic Multidisc Wedge-belt
Efficiency, % 92-95 75-87 85-89 84-88
Kinematic range, Vmax / Vmin 1000
and more3 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 Technical data of a class 1.4 tractors' automatic transmission controlled by transmission controlled by ММPV (adaptation)PV (adaptation)
The maximum transferred power HP/кW 204/150Nominal rotational speed of the input shaft, min-1 1500±200Max rotational speed of the input shaft, min-1 less 2200Rotational speed of the output shaft, min-1 360±50Min rotational speed of the output shaft, min-1 0Max rotational speed of the output shaft, min-1 525The maximum moment on the input shaft, Nм 600The maximum moment on the output shaft, Nм 2800Variator’s efficiency 0,94 – 0,96 The maximum transmission ratio, N*m more than 1000The minimum transmission ratio, N*m 4,2-4,5Size, mm, less than length 565
width 480height 390
Weight, kg 150±20
Technical data of a class 1.4 tractors' automatic Technical data of a class 1.4 tractors' automatic transmission controlled by transmission controlled by ММPVPV
The maximum transferred power HP/кW 136/100Nominal rotational speed of the input shaft, min-1 1700Max rotational speed of the input shaft, min-1 less 2200Rotational speed of the output shaft, min-1 less 2200Min rotational speed of the output shaft, min-1 0The maximum moment on the input shaft, Nм 600The maximum moment on the output shaft, Nм 1700Variator’s efficiency 0,90– 0,94Adjusting of turnovers of an output shaft Stepless, without a break
of a power flow
Control system drive gear Automatic (transition to a manual mode is possible)
General view of construction MPVGeneral view of construction MPV
THE BASIC TECHNOLOGICAL THE BASIC TECHNOLOGICAL PARAMETERS AT MANUFACTURE МСВPARAMETERS AT MANUFACTURE МСВ
Materials used for manufactureст.40, ст.45, ст.40Х,
ст.20
Degree of accuracy of details manufacture 7
Degree of accuracy of cones manufacture 8
Hardness of detailsHRC – 28,0-38,5HRCэ – 45,0-57,0
Case hardening of details h = 0,7-1,2 мм
Settlement specific loads on the basic relaying elements
[Ϭк ] = 8-15 кг/мм2
Sample of experimental design of MPVSample of experimental design of MPV
Tractor variator
The sample of experimental construction The sample of experimental construction МСВ МСВ
Patent protection of Patent protection of ММPVPV
Ukraine
Russia
Belorussia
China
Stand tests of MPV with automatic controlStand tests of MPV with automatic controlMachines and systems institute(IMIS)
г. Kharkov, Ukraine
ContactsContacts
Association Association ««Ukrainian innovation companiesUkrainian innovation companies»»49000, Ukraine, Dnepropetrovsk
81, Karl Marks Ave
Tel/fax: +380 56 2 350080web: www.auic.com.ua
e-mail: [email protected]
Contact person:Contact person:
Vice president of the AssociationVice president of the Association,,DrDr. . Alexander PliskanovskyAlexander Pliskanovsky
mobile: +380 50 4801703e-mail: [email protected]