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SANDVIK MT520/PLC, Technical Description

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SANDVIK MT520/PLC Technical Description Download Page 17

SANDVIK Tunneling Miner 

MT520 / 

PLC

 

 

Page 17 of 31 

 

 

www.sandvik.com

 

 

 

 

Technical description-MT520-PLC specification .220.Rev 1

 

Conveyor Drive Assembly 

The conveyor is hydraulically driven via a bevel-planetary gear box. Smooth start-up for longer 
chain life time is provided. 

The complete drive assembly is mounted on a tensioning device which is used for tensioning 
and releasing of the conveyor chain via a grease-activated cylinder. 

 

 

 
 

1 

Tensioning slide 

5 

Dirt scraper 

2 

Hydraulic motor 90 [kW] 

6 

Blind bearing 

3 

Bevel planetary gear box 

7 

Tensioning cylinder 

4 

Driving shaft with sprocket 

 

 

 
The conveyor gear box is part of the conveyor driving station which drives the conveyor. The gear box is 
driven by a hydraulic motor. The chain speed is adjustable from 0.5 to 0.9 m/sec. 
 
 
 
 
 
 
 
 
 
 
 
 
 

1 

Bevel gear stage 

3 

Input drive seal 

2 

Planetary gear stage 

4 

Output drive seal 

 

Nominal power [hydraulic] 

280 

[bar] 

Input speed max. (rpm) 

1440 

[min

-1

] 

Summary of Contents for MT520/PLC

Page 1: ...SANDVIK Tunneling Miner MT520 PLC Page 1 of 31 www sandvik com Technical description MT520 PLC specification 220 Rev 1 Technical Description ...

Page 2: ...2 Operator s Cabin 28 4 13 Lubrication System 29 4 14 Cooling and Water Supply System 30 4 15 Special tool for machine assembly and cutter head maintenance 31 Disclaimer SANDVIK MINING AND CONSTRUCTION shall not be held responsible for any errors or omissions contained in this document and reserves the right to make changes or additions without prior notice due to continual product developments Th...

Page 3: ...SANDVIK Tunneling Miner MT520 PLC Page 3 of 31 www sandvik com Technical description MT520 PLC specification 220 Rev 1 1 Machine Layout ...

Page 4: ...25 Basin radius m 25 Slope side in rock max 5 Incline Decline max 18 Geometric Characteristics Slewing of cutter boom 37 Vertical lifting from horizontal upwards 43 Vertical lowering from horizontal downwards 33 Forces Traction force per track theoretical force on drive sprocket kN 420 At the cutter boom including forces of gravity lifting kN 355 lowering kN 387 General MT520 Total weight metric t...

Page 5: ... kW 537 Cutter motor water cooled nominal power kW 315 nominal torque Nm 2040 Hydraulic motor air cooled nominal power kW 150 nominal torque Nm 975 Loader motor water cooled nominal power kW 2 x 36 nominal torque Nm 2 x 237 Hydraulic system load sensing Hydraulic pumps pcs 3 Filtration system l min 1300 Mineral oil hydraulic fluid l 700 Nonflammable hydraulic fluid l 700 Tank capacity l 480 System...

Page 6: ...SANDVIK Tunneling Miner MT520 PLC Page 6 of 31 www sandvik com Technical description MT520 PLC specification 220 Rev 1 3 Cutting Profile ...

Page 7: ...of the following major assembly groups for minimizing the assembly time and facilitating the transport 1 Cutter head 8 Crawler tracks 2 Cutter boom 9 Frame with rear stabilizer 3 Telescopic cutter boom with E Motor 10 Electric equipment 4 Water spray system 11 Profile visualization 5 Turret 12 Hydraulic equipment 6 Loading table 13 Operator s cabin 7 Double chain conveyor 14 Automatic lubrication ...

Page 8: ...he assembly is designed to provide a maximum penetration of 1200mm The cutter heads are guided by the cutter boom base a single piece solid steel structure and by the cutter telescope Modular construction allows the cutter assembly to be mounted with either transverse or inline cutting equipment The cutting assembly is made up of the following sub assemblies and components 1 Cutter boom base 4 Cut...

Page 9: ...integrated into the structure the two vibration damped lift cylinders sump in cutting from a stationary position up to a stroke of 1200 mm for this penetrating depth no moving of the machine is required better cutting efficiency because the machine is stabilized during the sump in operation selective cutting of a flat cutting face possible Cutter motor 315 kW 50 Hz alternatively 60 Hz water cooled...

Page 10: ...m EC38 is a heavy duty tool holder with a changeable tapered bushing The cutter head is fastened to the gearbox with cylinder bolts and a spline for torque transmission With this arrangement the head is easy changeable Type R315 IC39 Optimum range of operation Rock with 30 60 MPa uniaxial compressive strength UCS Tooled with 39 pick boxes suitable for 30 mm shank diameter picks Locked by 1 clip ri...

Page 11: ...nline cutter gearbox The actual configuration is specific to machine order Transverse cutter gear requests the use of a Transverse cutter head Transverse cutter gear and transverse cutter head is as option available Different inline cutter head is optional available Power Input speed rpm Input torque Gear ratio Output torque kW min 1 Nm kNm 315 1470 2040 40 30 82 0 The gearbox consists of two plan...

Page 12: ...he material to cut The water jet cools the picks during cutting and provides sufficient dust particle binding In case the incoming pressure of the water supply system is insufficient a booster pump for more water pressure is optionally available Water requirements to be provided by the customer Advantages of the flat nozzle spraying system Maximum dust suppression effect in the cutting area Effect...

Page 13: ...r motion is achieved at a constant speed Rotational motion horizontal pivoting is possible up to approx 37 in each direction Vertical displacement is driven by the two vertical pivot hydraulic cylinders Turret rotation up and down vertical pivoting is possible within a range of approx 75 The turret s integrated disc bearing serves to minimize vibrations Bearings bushings and pins must always be su...

Page 14: ...s in contact with the loaded material is covered with special 12 mm thick wear resistant plates The loading table is also used to stabilize the machine during cutting with its two hydraulic cylinders The two loading stars spinners move the material from the loading table into the chain conveyor The loading stars are also protected with high wear resistant plates Each loading star spinner is driven...

Page 15: ...ar box consists of a planetary drive stage and a bevel spur stage The loading star is directly mounted on the output side of the loader gear box Each of the two loader gear boxes is driven by a 36 kW electric motor Input power kW 36 Input speed rpm min 1 1440 Input torque Nm 239 Transmission ratio i 49 77 Output torque Nm 11885 Output speed rpm min 1 28 9 ...

Page 16: ... hydraulic motor via a bevel planetary gearbox The surface of the chain conveyor which is in contact with the transported material is protected with special 12 mm thick high wear resistant plates The discharge end of the double chain conveyor is high enough above track level and allows easy loading of most of the common truck types The maximum conveying capacity is 350 m h ensures a fast loading o...

Page 17: ...oning and releasing of the conveyor chain via a grease activated cylinder 1 Tensioning slide 5 Dirt scraper 2 Hydraulic motor 90 kW 6 Blind bearing 3 Bevel planetary gear box 7 Tensioning cylinder 4 Driving shaft with sprocket The conveyor gear box is part of the conveyor driving station which drives the conveyor The gear box is driven by a hydraulic motor The chain speed is adjustable from 0 5 to...

Page 18: ...ive made up of a gear box with brake and hydraulic motor In case of a pressure drop the hydraulic circuit the integrated brake is activated and the machine halts The 800 mm wide grouser shoes provide optimal traction over a wide variety of ground conditions Easy access to gear boxes hydraulic motors and chain tensioning cylinder reduce maintenance efforts During the cutting process in order to min...

Page 19: ...ar end and serve as support during the sumping and cutting operations 1 Track frame left right 2 Rear stabilizer unit left right 3 Turret interface 4 Stabilizer cylinder left right Rear Stabilizers The stabilizers which are located on the right and left of the frame s rear end can be individually lifted and lowered by means of hydraulic cylinders The purpose of the stabilizers is to transfer machi...

Page 20: ...all of the machine s functions are PLC Programmable Logic Control Only the Emergency Stop circuit and the START STOP functions of the filling pump are hard wired means they are not by the PLC system The electric equipment is based on the application of the protective conductor system All parts of the electric system which have body contact are connected to a protective conductor The control system...

Page 21: ...lso built in temperature sensors PTC resistors thermistors in order to monitor the temperature of the windings and bearings Capacities Cutter motor kW 315 Hydraulic pump motor kW 150 Loader Motor kW 2 x 36 Protection class Cutter motor IP 55 Hydraulic pump motor IP 55 Loader Motor IP 55 PLC Control The control and function monitoring of the SANDVIK Tunneling Roadheader MT520 PLC is done by means o...

Page 22: ...data of the machine in real time The Profile Visualization Monitoring System provides the following advantages Costly over excavation will be prevented The surfaces of the galleries can be cut more smooth and even The operator is considerably supported by the screen visualization in cases of poor visibility caused by dust and blind areas from the cabin position However if the Profile Visualization...

Page 23: ...lat screen monitor is mounted ergonomically inside the driver s cabin in good visibility for the operator The different screen levels provide the following information The pre programmed profile green line in relation to the maximum cuttable profile blue line The actual position of the cutter boom including measurements to the boundaries The cutter head is colored green as long as it is cutting in...

Page 24: ...distance will change grey to yellow resp white to red depending on the distance between the cutter head and the pre programmed profile At the display the color of the cutter head as well as the color of the numerical value of the distance will change yellow to red resp red to turquoise depending on the distance between the cutter head and the pre programmed profile At the middle axis of the profil...

Page 25: ...ature a minimum cross section of 120 mm of the trailing cable is recommended In case of more than 30 C ambient temperature a trailing cable with a minimum cross section of 150 mm is recommended Installed power on the machine Hydraulic motor 1x 150kW Cutter motors 1x 315kW with star delta start Conveyor motors 2x 36 kW Fan drive water pump 3x 4kW Option Filling pump 1x 0 75kW Average load 570 kVA F...

Page 26: ...e g exhausting unit must be considered in the transformer specification Trailing cable length In order not to exceed a voltage drop of 20 at the machine when using the 5 taps at the main control transformer the voltage drop on the cable must not be more than shown below Transformer with 4 reactance 1 400kVA 1 200kVA 1 000kVA 20 uT 16 68 16 13 15 35 acceptable voltage drop on the cable which leads ...

Page 27: ...produces such an amount of hydraulic energy which is actually being used by a consumer The hydraulic control valves are operated through directly mounted electrical pilot valves which are proportional control valves with load pressure feedback to the variable displacement pumps When reaching the maximum pre adjusted system pressure the pistons of the pump swivel automatically to zero delivery LOAD...

Page 28: ... cabin is FOPS approved Falling Object Protection Structure All control devices are ergonomically located around the operator The seat can be adjusted in different ways to optimize the operator s comfort The seat and the cabin structure have shock absorbers to minimize disturbances by the vibrations during operation The sides and the rear of the cabin are equipped with safety glass ensuring good v...

Page 29: ...riable within a certain range Grease is continuously supplied to the connected lubricating points Some elements are not lubricated via the central lubrication system but must be manually greased by means of some individual grease nipples and lubrication strips The lubrication strips act as a central distributor to reach points which are difficult to access or which are located in one of the machin...

Page 30: ...r loading unit cooling jacket hydraulic fluid heat exchanger The open circuit cooling system requires a quantity of approximately 50 l min of clean water to be supplied to the machine The water passes all components to be cooled and then enters the flat nozzle spaying system The hydraulic oil is additionally cooled by a heat exchanger also cooled with a hydraulically driven radiator This second co...

Page 31: ...of the basic machine specification which includes the tool set for cutter head a sealant lubricant set and two torque wrenches The cutting head tool kit is used for pick assembly and disassembly and for assembly and disassembly of the pick bushings Furthermore the sealant and lubricant is used for the Roadheader assembly Cutting head tool kit Sealant and lubricant Torque wrench 750 2000 Nm Torque ...

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