AGRICULTURAL MACHINERY FUNCTIONAL AND SAFETY TESTING SERVICE

Transcription

1 AGRICULTURAL MACHINERY FUNCTIONAL AND SAFETY TESTING SERVICE Test centre: Sprayer: SV Manufacturer: VMA S.r.l. Via F. Crispi, 184 S. Maria della Versa (PV) Test Report No February

2 Description of machine The implement is a trailed sprayer for use with ground crops. The feed unit (pump, filters, fan, dispensers) is connected to the tractor via a 3-point hitch. The trailed tank is connected to an ad hoc support situated on the back of the feed unit. This connection allows for independent movements of the two modules. The implement is type-approved for road circulation. The machine frame is made out of painted steel, the main and auxiliary tanks are made out of polyethylene. A gauge is located on the front right of the main tank. The liquid level is indicated by a transparent external tube. The nominal capacity of the tank is 1000 l. The implement is powered via the tractor PTO having a rated power of 540 rpm. The machine has a self-priming centrifugal pump operated using v- belts with automatic tightener. The pump is located on the left. The pump serves to handle phytoiatric mixing (agitation and distribution) and to fill the main tank. Centrifugal pump and levers controlling hydraulic circuit Liquid is sprayed and conveyed pneumatically. Air flow is generated by a centrifugal fan having closed blades made from steel plate. The steel casing is endowed with 2 independent outlets at a distance of 180 from each other (above and below). The shaft transmitting drive to the fan includes a centrifugal clutch with automatic declutching, enabling the fan to turn independently in relation to the power source. Drive is transmitted from the PTO to the fan via an overgear with oil-bath lubrication and multiple chain. 2/8

3 Transmission parts are located inside a pig-iron cast. Drive to the fan can be interrupted using a lever-controlled release gear. It is characterised by a centrifugal fan having a runner diameter of 550 mm. The hydraulic circuit is of the constant pressure type. The lever to adjust pressure is located on the tank, while distribution on the two sides is controlled via electrical controls on a panel in the driver s cab. The pressure gauge is placed on the feed unit; it has a diameter of 100 mm, end scale of 6 bar and is in intervals of 0.2 bar. Liquid is supplied using a fan-based feed unit with 4+4 independent flow regulators situated in the lower section of the fan, and a second unit with blow guns located on the upper outlet of the fan. Liquid flow is adjusted by varying operating pressure and via adjustable dispensers endowed with an antidrip device placed on every liquid outlet. 3/8

4 Size and weight length width max height tank height empty weight total weight 3100 mm 1300 mm 2400 mm 1380 mm 420 kg 1500 kg 3 point linkage cat. II Spraying unit 1+1 cannoncini 1+1 ventagli with anti drip device Filling opening diameter 385 mm strainer height 260 mm horizzontal distance 200 mm vertical distance 1380 mm height (m) Vertical pattern left right m % -5% 0% 5% 10% Hand wash tank 17.5 l Centrifugal fan Main tank l % Pump 0.6 TELLARINI - AL 40 Rinsing water tank -15% -10% -5% 0% 5% 10% 15% max flow rate 140 l/min 68.0 l 4/8 5/8 height (m) left right 5.00 m

5 Main results of functional tests in the tank horizontal Residual (l) with back flow - with agitation 4,15 with back flow - without agitation -- without back flow - without agitation 0,95 inclined to right 1,25 inclined to left 1,10 inclined to rear 2,13 inclined to front 0,55 in the hoses: dilutable 3,50 dilutable residual 1 5,63 in the hoses: non dilutable 2 1,05 total residual 6,68 1 Liquid that can flow back into the main tank and can be diluted by the washing tank contents 2 Liquid that not can flow back into the main tank concentration 3 115% 110% 105% 100% 95% 90% 85% Agitator performance Pressure gauge Fan diameter 100 mm flow rate power consumption distance between mark 0,20 bar 550 mm m3/h 25,5 kw accuracy 0,05 bar Air speed measured 0.50m from outlet 2,6 2,3 2,0 liquid sprayed (l) 3 Copper oxychloride concentration measured during the tank empying, after 16 hours standing and 10 minutes of agitation. height (m) 1,7 1,4 1,1 0,8 0, air velocity (m/s) 6/8

6 Appraisal of performance Contents Assesment key X XX XXX Spray tank surface roughness XXX µm > <30 Spray tank overvolume X % 5-8 >8-12 >12 Residual (related to the max value) XXX >2/3-3/3 1/3-2/3 <1/3 Spray tank content gauge up to 20% filling X % <2.5 Spray tank content gauge from 20% filling X % < <2.0 Agitation system test (max concentration error) X % > <5 Accuracy of pressure gauge (max deviation) XXX bar > > Accuracy of regulator (max deviation) XXX % <2.5 Adjustment of volume application rate n.a. % > <3 Pressure drop XXX % > <3 Application rate during spraying XX % > <3 Nozzle flow rate (provided/measured) X % > <3 Nozzle flow rate (measured/mean) XX % > <3 Nozzle flow rate (left/right) XXX % < <2.0 Fan flow rate (provided/measured) XX % > <3 Clean water tank X % tank nominal volume >12-15 >15 Testing of Safety The machine is endowed with CE marking, an identification plate, safety pictograms, an instruction handbook and an EC manufacturer s declaration of conformity. The EC manufacturer s declaration of conformity certifies that the machine conforms to the following harmonised standards and technical specifications: UNI EN 907:1998, UNI EN 1553:2001, ISO 11684:1995. Checks carried out with reference to documentation sent by the Manufacturer did not show up inconsistencies with the contents of the aforementioned standards. The relative documentation has been filed. 7/8

7 The present test report is valid for five years or until reference standards for the sprayer, Model SV are altered. The machine has been submitted for certification at the request of the manufacturer. Functional testing was carried out in compliance with the provisions of the Protocol for the testing of functional characteristics of crop protection machinery (ENAMA rev.1 July 2002) at the Mechanics Section of the Department of Agricultural, Forestry and Environmental Economics and Engineering, University of Turin. Supervisor: Prof. Paolo Balsari Data collectors: Dr. Mario Tamagnone, Dr. Daniele Ghigo MANUFACTURER: VMA Srl Tel Fax info@vmaatomizzatori.it website: E.NA.M.A. - ENTE NAZIONALE PER LA MECCANIZZAZIONE AGRICOLA VIA VENAFRO, ROMA TEL. 06/ FAX 06/ info@enama.it 8/8