ENTAM TEST REPORT No a

Transcription

1 AGRICULTURAL MACHINES FUNCTIONAL AND SAFETY TESTING SERVICE ENTAM TEST REPORT No a AIR-ASSISTED FIELD SPRAYER: IBIS 25 - ALA UNI 21 (extensions: b IBIS 25 ALA UNI 18; c IBIS 25 ALA UNI 24; d IBIS 20 ALA UNI 16; e IBIS 20 ALA UNI 18; f IBIS 20 ALA UNI 21) MANUFACTURER: MAZZOTTI S.R.L. Via Dismano, RAVENNA, ITALY Rome, November 22 This report has been made by ENAMA under its responsibility

2 TESTS CARRIED OUT IN COMPLIANCE WITH ENTAM SPECIFICATIONS NO 2: TECHNICAL INSTRUCTIONS FOR ENTAM TESTS OF FIELD CROP SPRAYERS BY THE MECHANICS SECTION OF THE DEPARTMENT OF AGRICULTURAL, FOREST AND ENVIRONMENTAL ECONOMICS AND ENGINEERING, UNIVERSITY OF TURIN: Supervisor: Prof. Paolo Balsari Data collector: Dr. Mario Tamagnone TABLE OF CONTENTS TECHNICAL DATA 3 SIZE AND WEIGHT 3 MAIN TANK 3 AUXILIARY TANKS 3 INTRODUCTION BOWL 4 CLEANING OF COMMERCIAL PRODUCT CONTAINERS 4 PUMP 4 FILTERS 4 FLOW RATE ADJUSTMENT 5 MONITORING OF DISPENSING 5 PRESSURE ADJUSTMENT 5 FLOW ADJUSTMENT 5 SET-UP OF DISPENSING SYSTEM 5 BOOM 5 FAN 6 NOZZLES 6 DESCRIPTION OF MACHINE 6 RESULTS 7 MAIN TANK 7 FLOW RATE ADJUSTMENT 8 CONTROL INSTRUMENTS 8 PRESSURE DROP 9 ANTIDRIP DEVICE 9 NOZZLE FLOW RATE 9 REGULARITY OF TRANSVERSAL DISTRIBUTION 10 FAN 10 TOTAL RESIDUE 10 NOTES ON FUNCTIONALITY 10 RECOMMENDED CONDITIONS OF USE 11 TESTING OF SAFETY REQUIREMENTS 11 To facilitate interpretation of the results, it should be remembered that: 1 MPa = 10 bar 1 kw = 1.36 CV 1 m 3 /s = 3,6 m 3 /h 1 m/s = 3.6 km/h 1 l = 1 dm 3 C.V. (coefficient of variation) = parameter indicating the extent of data deviation from mean value. 2/12

3 Technical data engine Perkins 14.40TW declared HP (kw) 91 transmission hydrostatic forward speed minimum (km/h) 0-20 maximum (km/h) 0-40 tyres 230/95 R44 alternatively 270/95 R44 420/85 R34 340/85 R38 brake systems hydraulic on all rear wheels suspension hydraulic on 2 axles approval for road circulation yes Size and weight max. total length (mm) 7330 wheelbase (mm) 3280 underbeam clearance at centre of machine (mm) 8-15 max. transportation width (mm) 25 max. transportation height (mm) 3750 max. total mass empty (kg) 60 full load (kg) 8940 Sprayer model UNIGREEN 5035/61F Main tank ID code and model 20 ( ) - 25 ( ) material fibreglass nominal capacity (l) diameter filling hole (mm) 385 emptying system ball valve left side graduated contents indicator float right side sensitivity (l) 1 filling system auxiliary pump agitation system hydraulic Auxiliary tanks auxiliary tank for cleaning circuit ID code and model effective capacity (l) 255 3/12

4 auxiliary tank for operator ID code and model R effective capacity (l) 15.2 Introduction bowl present yes left side model top mix 40 capacity (l) 40 Cleaning of commercial product containers present Pump 4/12 yes left side manufacturer Comet model BP 280 piston-diaphragm maximum speed (RPM) 550 nominal flow rate (l/min) 265 max. pressure (bar) 20 hydropneumatic compensator yes Filters filling number 2 filling hole strainer mesh material nylon mesh opening (mm) 1 filtering surface (cm 2 ) 2814 external suction tube cylinder mesh material stainless steel mesh opening (mm) 1 filtering surface (cm 2 ) 320 suction right side cylinder mesh material stainless steel mesh opening 80 filtering surface (cm 2 ) 4 delivery number 1 right side cylinder mesh material stainless steel mesh opening 1

5 filtering surface (cm 2 ) 216 Flow rate adjustment TeeJet 844 computer, motorised TeeJet control unit, Polmac 10 1 l/min flow meter, TeeJet motorised boom section unit, no backflow, calibrated Monitoring of dispensing possibility of placing controls inside cab: yes possibility of working in fully closed cab yes Pressure adjustment operation Flow adjustment operation Set-up of dispensing system operation control Boom driver s seat driver s seat driver s seat electrical electrical electrical hydraulic base deformable trapezium height adjustment stepless minimum (mm) 5 maximum (mm) 20 folding hydraulic with electrical control side inclination hydraulic with electrical control oscillation hydraulic clamping electrical control variable hydraulic with electrical control nozzle spacing (mm) 5 diameter nozzle-holder tube (mm) working width (mm) total width (mm) number of nozzle holders number of nozzles section ALA UNI 16 no. nozzles working width (mm) ALA UNI 18 no. nozzles working width (mm) ALA UNI 21 5/12

6 Fan no. nozzles working width (mm) no. nozzles working width (mm) ALA UNI 24 no. nozzles working width (mm) number 1 axial, fixed blades rear axis of rotation vertical size diameter of runner (mm) 680 area of flow section 0.24/ / / /24 number of blades 14 number of speeds stepless electrical control max. rotation speed (motor with rotation speed of 2,2 rpm) (rpm) 36 Nozzles Antidrip device mount nozzle nozzle holder Description of machine The machine is a self-propelled sprayer for use on ground crops. Liquid is sprayed from small-sized nozzles. Drops are conveyed by a draught of air generated by an axial fan. The machine frame is made out of painted steel; the main tank and the circuit cleaning tank are made out of fibreglass while the auxiliary tank for the operator is made out of polyethylene. The main tank, having a nominal storage capacity of 2,0-2,5 l, is fitted with a content indicator located on the front left of the tank, the liquid level can be viewed using an membrane Bayonet flat fan, low-drift flat fan triple external transparent tube connected to a float placed inside the tank. The tank may be filled directly from an auxiliary pump using a pipe fitted to a hydraulically-controlled winder. To access the tank s filling hole a small ladder leads up to a raised platform on the left hand side. On the left are the auxiliary tank for the operator and an introduction bowl for products, inside which is a device for cleaning empty containers. The tank for cleaning the dispensing circuit and inner walls of the tank is located in the cab. The piston-diaphragm pump is operated by a hydraulic motor. 6/12

7 The hydraulic circuit dispenses spray mixture in proportion to the vehicle s forward speed and is electronically controlled. The machine has a sensor to determine forward speed and a flow meter to determine the boom flow rate. Using the data supplied by these sensors and by the operator via the control panel in the cab, the electronic system can control the motorised valve that adjusts working pressure to keep the volume application rate constant regardless of the forward speed and/or the number of active boom sections. The pressure gauge to monitor working pressure, 1 mm in diameter, is ed on the front of the machine, clearly visible to the operator. The part of the gauge 0 8 bar covers 225 of the face and is in intervals of 0.2 bar with KI 1.0. The remainder of the gauge (8 25 bar) covers 90 of the face, and is in intervals of 1.0 bar with KI 2.5. The sprayer may have spray booms of differing working width: 16m, 18m, 21m or 24m. An oil-pressure system is used for open-close, height adjustment and inclination movements. These movements are handled using electric impulses via a control panel in the cab; an acoustic alarm sounds during every movement of the boom. During transportation the boom is folded to the sides of the tank. The articulated parallel link to support the booms is endowed with hydraulic suspension The filtering system consists of a filter fitted to the pump suction unit (that can be inspected even when the tank is full) and a filter fitted to the adjustment unit outlet. Filters are also present for the filling hole and for tubing used to fill the tank. The air-assisted kit (optional) consists of an axial fan mounted to the rear of the boom, sending air to a conveyer, which then distributes air along the whole boom. The fan is powered via an oil-pressure circuit. The speed of the fan is adjusted and controlled electrically via a control panel located in the cab. The machine is endowed with an airconditioned cab, access to which is via a ladder on the front left. The forward speed and direction are controlled via a lever located on the right side of the driver s seat; this lever also contains the main controls for operating the boom. Results Main tank The maximum capacity is 2,289 l (+14% with respect to nominal value) for the IBIS 20 model and 2,759 l (+10%) for the IBIS 25 model. The lid is screwed onto the tank and has a diameter of 385 mm. The emptying system, on the right hand side, collects liquid without contaminating the operator. The filling device prevents the possibility of a backflow of water from the tank to the outside. 7/12

8 Tank contents indicator The contents indicator is visible from the driver s seat during emptying operations, and is in intervals of 1 l. The maximum deviation between the contents indicator value and the actual amount is -2.4% up to 2 l (20% of nominal capacity) and 2.5% for the remaining part of the indicator. Residue in tank The amount of water remaining in the tank is 0.9 l with the machine in a horizontal, corresponding to 2.6 l regardless of machine inclination (Tab. 1). Inclination residue (l) horizontal 0.9 forward 1.0 backward 2.6 right 1.5 left 1.5 Tab. 1 - Amount of liquid remaining in tank. Dilutable residue The amount of water present in hoses and lines, with a possibility of returning to the tank, is 24.7 l. The total dilutable amount is thus 27.3 l. was recorded; during emptying operations measurements were between 86.5% and 97.5% (Fig.1). concentration 120% 115% 110% 105% 1% 95% 90% 85% 80% IBIS 20 IBIS liquid dispensed (l) Fig. 1 - Concentration measured at nozzle outlets depending on the amount of liquid in the tank. Flow rate adjustment Working pressure proved to be constant with the constant rotation of the pump, regardless of the amount of liquid in the tank. Following changes to operating conditions (no. of active boom sections, forward speed, etc.) the system showed itself capable of quickly adjusting the machine flow rate to the new operating conditions Agitation of liquid The machine s agitation system proved to be capable of attaining the maximum product concentration inside the tank as provided for by existing legislation. After 10 minutes of agitation a concentration of 86.9% Control instruments Pressure gauge Within the framework of working pressures at which the machine is likely to be used (2 8 bar) the maximum deviation between the pressure 8/12

9 gauge value and the control pressure gauge is 0.03 bar (Fig.2). deviation (bar) test pressure (bar) Fig. 2 - Accuracy of the pressure gauge Speed gauge The deviation between the actual speed and that indicated is in the region of -1% (Fig.3). deviation 5% 4% 3% 2% 1% 0% -1% -2% -3% -4% -5% flow rate (l/min) Fig. 4 - Accuracy of flow meter Pressure drop The maximum difference between pressures measured at the beginning and at the end of the boom sections is 7.6%. Antidrip device The machine s membrane antidrip devices were found to work in a regular and correct manner. deviation 3% 2% 1% 0% -1% -2% -3% forward speed (km/h) Fig. 3 - Accuracy of speed gauge Flow meter The meter showing the amount of liquid delivered gave results ranging from +1.5 to 0.8% (Fig.4). Nozzle flow rate The mean flow rate of the machine s nozzles is 0.82 l/min for the Teejet XR112 nozzles, 1.54 l/min for the Teejet XR114 nozzles and 2.28 l/for the Teejet XR116 nozzles with a pressure of 3.0 bar (Table 2). Flow rate changes on the basis of working pressure are given in Fig.5. Mean flow rate (l/min) nozzle mean max min XR % -2.2% XR % -2.7% XR % -2.1% Tab. 2 - Nozzle flow rate parameters. 9/12

10 4 3 2 flow rate (l/ i ) 1 TeeJet XR 112 TeeJet XR 114 TeeJet XR pressure (bar) Fig. 5 - Changes to nozzle flow rates on the basis of working pressure. The mean speed of outgoing air (measured at a distance of 0.5m below the nozzles) is: boom (m) air speed (m/s) Regularity of transversal distribution Transversal distribution uniformity was measured at a working height of 6 mm and a working pressure of 3.0 bar. The uniformity of diagrams, expressed as a coefficient of variation, is below 7%. Fan The speed of the hydraulically operated fan can reach up to 3,6 rpm at a motor speed of 2,2 rpm. The fan air flow rate (m 3 /h) is: Total residue The total amount of liquid in the machine is: width sections residue (l) limit (l)* 16 m m m m m * limit referring to 20 l tank fan speed (rpm) boom (m) Notes on functionality The tested machine proved capable of supplying performance levels within the limits established by existing legislation (Tab.3). 10/12

11 Parameter measured value limit accuracy of tank contents indicator up to 20% of nominal capacity max. 2.4% 7.5% over 20% of nominal capacity max. 2.5% 5.0% pressure drop max. 7.6% 10.0% uniformity of nozzle flow rate max. 2.7% 5.0% amount dripped 0 ml 2 ml horizontal distribution (CV) max. 6.3% 7.0% interruption of sections max 7.5% after 7 s 10% after 7 s speed changes max 7.2% after 7 s 10% after 7 s reproducibility of delivered volume (CV) max. 2.6% 3.0% agitation 86.5% % 85% - 115% accuracy of pressure gauge max 0.03 bar 0.2 bar accuracy of speed gauge max. 1.2% 5.0% accuracy of flow meter max. 1.5% 5.0% Tab. 3 - Summary of measurements and comparison with legislative limits. Recommended conditions of use It may be stated, in light of the results of tests and machine performance, that the sprayer to which the present certificate refers ensures a good uniformity of both transverse and longitudinal distribution in relation to the direction in which the vehicle is travelling. To adapt to different user needs (preor post-emergency weeding, fungicide treatment, etc.) nozzles having different flow rates may be fitted to the machine. On the basis of results obtained during certification testing, with special reference to distribution diagrams, a working height in excess of 4 mm is recommended. To ensure that the machine attains the performance levels measured it should operate with nozzles having a spray angle of 110. Testing of safety requirements The machine is endowed with CE marking, an identification plate, safety pictograms, a user and maintenance 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 294:1993, UNI EN 907:1998; UNI EN 1553:21; 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. 11/12

12 THE PRESENT TEST REPORT IS VALID UNTIL REFERENCE REGULATIONS CHANGE FOR THE AIR-ASSISTED SPRAYER MODEL IBIS 25 ALA UNI 21 AND RELATIVE EXTENSIONS, MANUFACTURER: MAZZOTTI S.R.L. THE PRESENT TEST REPORT IS OFFICIALLY RECOGNISED BY THE FOLLOWING ENTAM MEMBERS WITH THEIR RELATIVE RECOGNITION NUMBERS: BBA - Federal Biological Research Centre for Agriculture and Forestry - GERMANY n. ENT-I-02/03 BLT - Bundesanstalt für Landtechnik Federal Institute of Agricultural Engineering - AUSTRIA n. 022/03 DIAS - Danmarks JordbrugsForskning Danish Institute of Agricultural Sciences - DENMARK n a-31 EMA - Estación de Mecánica Agrícola SPAIN n. 06/03/3 FAT - Swiss Federal Research Station for Agricultural Economics CH-8356 Tänikon and Engineering SWITZERLAND n. I N.AG.RE.F - National Agricultural Research Foundation GREECE n. ΛE/27/01/ZZ is the European Network for Testing of Agricultural Machines and its purpose is to promote a cooperation among testing stations in order to optimize activities and give a better service to farmers, dealers and manufacturers. For more informations about the Members and activities please visit: or send an to: info@entam.com ENAMA ENTE NAZIONALE PER LA MECCANIZZAZIONE AGRICOLA (National Agricultural Mechanisation Body) VIA LAZZARO SPALLANZANI, 22/A ROME TEL. 06/ FAX 06/ info@enama.it 12/12