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Micron Sprayers Turbofan Installation And Instruction Manual

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TURBOFAN
Instruction manual and
installation guide
Micron Sprayers Limited
Bromyard Industrial Estate
Bromyard, Herefordshire
HR7 4HS, UK
Tel: +44 (0) 1885 482397
Fax:+44 (0) 1885 483043
E-mail: micron@micron.co.uk
URL: http://www.micron.co.uk

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  • Page 1 TURBOFAN Instruction manual and installation guide Micron Sprayers Limited Bromyard Industrial Estate Bromyard, Herefordshire HR7 4HS, UK Tel: +44 (0) 1885 482397 Fax:+44 (0) 1885 483043 E-mail: micron@micron.co.uk URL: http://www.micron.co.uk...

  • Page 2: Table Of Contents

    CONTENTS SECTION INTRODUCTION SPECIFICATION TEN KEY POINTS FOR USERS INSTALLATION 4.1 Mounting of Sprayheads 4.2 Hydraulic System 4.3 Spray liquid 4.4 Testing OPERATION 5.1 Daily Inspection 5.2 Calibration Procedure 5.3 Position of Sprayheads 5.4 Sequence of Operation 5.5 After Use HEALTH AND SAFETY CALIBRATION AND ADJUSTMENT 7.1 Application Rate...

  • Page 3: Introduction

    Should field service be necessary, the simple design of the sprayhead enables it to be dis- mantled and cleaned in minutes. TURBOFAN sprayheads require a hydraulic oil supply to operate. This can often be pro- vided by the tractor or vehicle’s own hydraulic system. Alternatively, it may be neces- sary to install an auxiliary hydraulic system with its own reservoir and power driven hy- draulic pump.

  • Page 4: Specification

    124 Bar pressure drop across each motor (approx.) 4000 rpm 3/8 BSP (F) 3/8 BSP (F) 1/8 BSP (F) 98 m³/min/head (3460 ft³/min) 18 m/sec (40.2 mph) Figure 1. Turbofan spray head AXIAL FAN ATOMISER SAFETY GUARDS MOUNTING BRACKET HYDRAULIC MOTOR...

  • Page 5: Ten Key Points For Users

    3.0 TEN KEY POINTS FOR USERS The following list of ten points is intended to assist users in the efficient use of Turbofan sprayheads. It is hoped that this section will encourage users to read the entire handbook and follow its recommendations.

  • Page 6: Installation

    DRAFT 4.0 INSTALLATION The design of a sprayer incorporating Turbofan Sprayheads will vary according to the crop to be sprayed, the type of sprayer being used and the available hydraulic power. This section gives general advice and design data but is not intended to provide specific instructions for building every type of sprayer.
  • Page 7 Each sprayhead must be positioned sufficiently far from the crop to allow the airflow from the fan to disperse the spray droplets over a wide band and to prevent local over- application of foliage close to the atomiser. However, the distance should not be so great that the airflow becomes dissipated or that the spray droplets could be prone to drift in a wind.

  • Page 8: Hydraulic System

    Drain lines must be fitted to all motors. It is possible to connect Turbofan Sprayheads in series but the numbers of motors in each series chain should be limited to two. It is important to note that the pressure drop across series pairs of motors is approximately 200 bar which is higher than most tractor hydraulic systems can provide.
  • Page 9 • A hydraulic system with a relief valve setting of 200 bar (or above) is necessary for series running (i.e. pressure drop of Turbofan unit x 2 = 100 bar x 2 = 200 bar). • It should be noted that most tractor hydraulic systems operate below this figure and are therefore unsuitable for running Turbofans in series (i.e.
  • Page 10 To calculate the hydraulic flow required for a specific number of Turbofan Sprayheads running in series pairs: • Each head and each chain runs at 8.0 l/min • Allow 10% for pump and other hydraulic losses. Therefore flow per chain (ie 2 x Turbofan) = 8.8 l/min...
  • Page 11 DRAFT TABLE 1 – Pressure drop along hydraulic hoses...
  • Page 12 Micron recommend connecting the hydraulic motors of sprayheads in parallel. If con- nected in series a maximum of two motors in each series chain should be used. The supply and return connections MUST NOT be reversed as the fan will run in the op- posite direction with little or no airflow.
  • Page 13 4.2.10 Hydraulic Oil Only specially formulated hydraulic oils should be used with Turbofan Sprayheads. En- gine lubricating oils must never be used. Shell Tellus 32 or equivalent hydraulic oil is recommended for most conditions but Shell Tellus 37 or equivalent should be used in tropical climates.
  • Page 14 DRAFT Figure 6. Typical self-contained hydraulic system...
  • Page 15 DRAFT PRESSURE GAUGE PRESSURE LINE FROM TRACTOR PRESSURE SIDE FLOW FILTER RETURN CONTROL LINE CHECK VALVE FILTER OPEN CENTRE SYSTEM PRESSURE GAUGE PRESSURE LINE FROM TRACTOR NEEDLE PRESSURE SIDE VALVE FILTER RETURN LINE CHECK VALVE FILTER Note: Return line may have to be taken to oil filler point of tractor (see tractor manual...

  • Page 16: Spray Liquid

    A pressure side filter should also be fitted to self-contained systems. See Fig 6 . Spray Liquid The flow of spray liquid to each Turbofan Sprayhead must be regulated to give the correct total output from the sprayer and consequently the required application rate on the crop.
  • Page 17 If a new sprayer is being designed or an original pump is to be replaced, it is suggested that a diaphragm or centrifugal type is chosen. This should be able to provide a pressure of about 1 – 3 bar (15 – 45 psi) and should be capable of delivering the maximum flow rate of the sprayer plus the flow required for tank agitation (if a mechanical agitator is not used).

  • Page 18: Testing

    5.0 OPERATION As with all sprayers, optimum results will only be obtained from a machine fitted with Turbofan Sprayheads if it is correctly calibrated, operated and maintained. It is important that every operator who uses Micron sprayheads is completely familiar with their calibration and use.

  • Page 19: Sequence Of Operation

    This also ensures the most efficient cleaning of the atomiser discs. 6.0 HEALTH AND SAFETY Any sprayer using Turbofan Sprayheads must be used by a qualified operator in accordance with the recommendations and statutory requirements for the use of sprayers and the product being sprayed.

  • Page 20: Calibration And Adjustment

    9. Dispose of empty chemical containers safely by an approved means. Do not keep containers for re-use for other purposes. 7.0 CALIBRATION AND ADJUSTMENT As with any sprayer, a machine fitted with Turbofan Sprayheads must be calibrated before use. The following sections describe the calibration of a typical sprayer using Turbofan Sprayheads.
  • Page 21 The following steps describe the calibration procedure in detail: 1. Establish the average forward speed of the sprayer. The most accurate means of assessing the speed is to drive the sprayer in the actual crop. The speed can than be calculated from the time to cover a measured distance.
  • Page 22 This is converted to hectares by dividing by 10,000: Area treated This gives the standard formula for calculating the coverage of a sprayer: Area/min = swath width (m) x speed (km/hr) Example: Speed : Swath width: Therefore: Area treated Table 2 shows the coverage of the sprayer for various swath widths and spraying speeds.
  • Page 23 5. Calculate the output of each sprayhead by dividing the total output of the sprayer by the number of sprayheads. Example: Output: No of sprayheads: Output/sprayhead 6. Select the correct fixed restrictor orifice to give the required flow rate per sprayhead at the normal working pressure of the sprayer (typically about 2 bar or 30 psi).

  • Page 24: Maintenance

    8.0 MAINTENANCE The Turbofan Sprayhead is manufactured from high quality materials which have been selected for maximum strength, reliability and resistance to agricultural products. In order to ensure a long and trouble-free working life, it is important that each sprayhead should be periodically checked, cleaned and lubricated.
  • Page 25 5. Lift the front plate complete with distributor free of the main body and put to one side. 6. Remove front shaft (14) and fan (21) from the main unit by undoing four capscrews and washers (39,3). These two parts should be only a sliding fit on the hub (12) and can be removed easily.

  • Page 26: Parts List And Diagram

    TURBOFAN (BASIC) PARTS LIST (TBF/200) PART NO. DESCRIPTION 4915 SCREW, M5 X 16, S/S 5245 NUT, M4 NYLOC 5472 SCREW, M6 X 16, SET, HEX, S/S 5722 WASHER, M6, FLAT, S/S 5887 WASHER, M6 X 25 OD, PLAIN, S/S 5971...
  • Page 27 TURBOFAN PARTS DIAGRAM AJ 6381 AJ 6379 6793 AJ 6380 5971 6185 5722 5984 6087 6207 6078 6077 6067 6138 6248 5984 5722 6249 6277 MICRONAIR ATOMISER 6281 6280 6282 6279 6238 DRAFT 6184 6794 6194 6746 6266 5245 6256...
  • Page 28 TURBOFAN HYDRAULIC MOTOR DOUBLE SEAL ARRANGEMENT WITH "TELL-TALE" BOTTLE Since February 2003 the hydraulic motor driving the Turbofan head has been fitted with a double oil seal arrangement. Between the two seals there is a port connected to outside via the flange of the motor.

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