CAT Bucyrus 30MB3 MECHANICAL TECHNICAL MANUAL BI619316 – PDF DOWNLOAD

Technical Manual

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Manual No.M01271

30MB3 MAINTENANCE MANUAL SECTION

1

MACHINE DESCRIPTION

Helensburgh 30MB3 Maintenance Manual

MACHINE DESCRIPTION – 30MB3

General

The 30MB3 miner is a radio-controlled drum-type continuous miner with appropriate weight balance, cutting and loading power to enable the productive mining of coal and other soft mineral in seams ranging from 2.200mm up to 4, 000mm thick.

The machine is mounted on crawler tracks that provide full mobility and sharp turning radius in both bord and pillar and long wall development mining plans. The ranging cutting head mines material from the solid face using a chainless rotating drum, and a CLA-type gathering head with high speed conveyor efficiently moves mined material to a haulage system behind the miner.

The machine's weight and balance is designed to mine most efficiently by either sumping into the face at the top or bottom of the seam, and ripping material to the bottom or top of the seam.

The above figure shows a general arrangement of major mechanical components. A full description of the various major sub-systems of the 30MB3 follows.

Bucyrus Australia

Specifications

Helensburgh 30MB3 Maintenance Manual

Tramming Speed 1st = 0 – 10 Metres/Minute

2nd = 13 Metres/Minute

3rd = 26 Metres/Minute

Tracks Crawler Type LH & RH Independent

Brakes Oil Flushed Spring Applied Park Brake

Drives Electrical - Mechanical

Steering Skid Steer

- Mainframe complete with track drive gear cases motors and tracks including pump motors

- Total Cutter Head Assembly

a) Cutter Head Frame including motors

b) Cutter Head Gear case

- Conveyor Assembly Intermediate and discharge

- Gathering Head Assembly complete with drill rigs and shields

kg

Helensburgh 30MB3 Maintenance Manual

Helensburgh 30MB3 Maintenance Manual

Bucyrus Australia

Main Chassis

CONVEYOR PIVOT POINT

GATHERING HEAD PIVOT POINT

CUTTING HEAD PIVOT POINT

GATHERING HEAD PIVOT POINT

HYDRAULIC TANK

GATHERING HEAD PIVOT POINT

Main Chassis

The main chassis of the machine is a robust box-type structure of high-strength steel construction that provides the following:-

Mounting of the RH and LH crawler tracks and their independent drive systems and take-up provisions.

Independent pivots for mounting the cutting head and gathering head and conveyor components and their associated hydraulic cylinders for articulation.

An integral hydraulic oil tank along with two electric motor/hydraulic pump assembly‘s and associated valves and piping.

A rear stabiliser and its articulating hydraulic cylinder for improving leverage forces during sheardown in the cutting sequence.

Mounting provisions for all major electrical system components and their associated wiring.

Helensburgh 30MB3 Maintenance Manual

Helensburgh 30MB3 Maintenance Manual

Cutting Head Assembly

The cutting head assembly is attached to the main chassis at RH and LH independent pivot points around which the assembly is articulated for vertical-ranging cutting of the coal seam. The independent pivots allow removal of the cutting head assembly without disturbing the gathering head or conveyor components.

Cutter Head Frame

The cutting head assembly consists of the following:-

The cutting head support frame, a robust box structure which includes the RH/LH pivot points for attaching to the main chassis, upper mounting clevises for the two cutting head raise cylinders, and a major bolting flange to which the cutting head drive assembly mounts.

The cutting head gear case assembly, which consists of a input gear case and water-cooled 173 kW AC electric drive motor for each of the RH and LH sides, a final drive gear case which includes drive gearing, a main drive shaft and mounting points for the 1067mm diameter RH, LH, intermediate and centre drums, and a major bolting flange for mounting onto the cutting head support frame. The outer cutting drums are independently mounted to the major bolting flange and have an extension/retraction of 300mm each side from 5200mm to 4600mm and can be removed as an assembly.

The cutting head assembly is raised and lowered by two (2) heavy-duty hydraulic cylinders mounted to the main chassis at their lower ends and attached at their upper ends to main longitudinal structural members of the cutting head support frame. These cylinders enable the cutting head assembly to range from 249 mm below ground level to a maximum height of 4100mm.

The power train of the cutting head consists of RH and LH sides, which tie together at the common main drive shaft, allowing the combined power of both electric drive motors to be available at any point on the cutting drums.

CUTTER HEAD PIVOT POINT

CUTTER HEAD DUST BELT

CUTTER HEAD COVERS

CUTTER HEAD COVERS

ELECTRIC MOTORS

WATER SPRAY BLOCKS WATER SPRAY BLOCKS

CUTTER CLUTCH CUTTER CLUTCH

Gathering Head Assembly

Gathering Head Assembly

The gathering head assembly is attached to the main chassis at RH and LH independent pivot points around which the assembly is articulated to adjust the gathering head for uneven floor conditions and for tramming the miner from place to place. The independent pivots allow removal of the gathering head assembly without disturbing the cutting head or discharge conveyor. The gathering head assembly includes the following:-

The gathering head structure consists of RH/LH pivot points for attaching to the main chassis, upper mounting clevises for the two gathering head raise cylinders, extendible plows compatible with extendible widths of the cutter head widths and shields mounted on rear of structure to support the roof bolting rigs.

RH and LH power trains, each of which include a water cooled 38 kW AC electric motor, an input gear case and a gathering head pot which drives a rotating centrifugal loading arm device. Mounting provisions for the Temporary Roof Support (TRS) systems in the shields. The gathering head assembly is raised and lowered by two hydraulic cylinders, which are mounted to the main chassis at their lower ends and attached to points of the gathering head structure at their upper ends. These cylinders allow vertical ranging of the forward edge of the gathering head from 200 mm below floor level to 537 mm above floor level.

The RH and LH power trains are connected to a common foot shaft which provides:-

(a) Proper timing of the rotating CLA loading arms and

(b) Drive power to a sprocket which drives the conveyor chain. This conveyor chain drives is reversible to aid in clearing debris which might restrict conveyor chain movement. The gathering head structure includes a special noise-damped running deck for the conveyor chain to minimise noise generation.

Helensburgh 30MB3 Maintenance Manual

Helensburgh 30MB3 Maintenance Manual

Conveyor Assembly

The conveyor assembly is attached to the main chassis at RH and LH independent pivot points around which the assembly is articulated vertically to assist in optimum loading into the haulage vehicle. Independent pivots allow removal of the conveyor assembly without disturbing the cutting head or gathering head components.

The conveyor assembly includes the following:-

An intermediate conveyor structure which includes the RH/LH pivot points for attaching to the main chassis, upper mounting clevises for the two conveyor raise cylinders, and a horizontal pivot arrangement at the rear for mounting the rear conveyor subassembly.

A rear conveyor subassembly which includes (a) a mating horizontal pivot arrangement allowing sideward swinging movement up to 45o on either side of the machine centre line to assist in optimum loading into the haulage vehicle and (b) a tail roller shaft for the conveyor chain and two hydraulic cylinders to maintain proper tension in the chain when the geometry of conveyor assembly changes during the operation. The intermediate and discharge conveyor structures each include a special noise-damped running deck for the conveyor chain to minimise noise generation and 914mm throat clearance for optimum loading rates.

TAIL ROLLER REAR DISCHARGE CONVEYOR

SWING CYLINDER SWING CYLINDER

FANTAIL PIVOT

CONVEYOR CHAIN

CROSS-OVER BRIDGE

CONVEYOR PIVOT POINT

Helensburgh 30MB3 Maintenance Manual

Traction Drive System

Traction Assembly

The traction drive system provides the necessary mobility for the 30MB3 miner to mine coal and to tram from place to place as needed. It includes:-

Independent RH and LH drive systems, each consisting of a water-cooled 55 kW DC variablespeed electric motor mounted to a drive gear case that powers drive sprockets to provide motion to the respective RH or LH crawler chain.

A forward-mounted crawler chain idler roller on each side which is equipped with a greasepowered piston to adjust the crawler chain to its proper tension; once adjusted by movement of the grease, the idler roller is locked into position by a necessary number of shims, and pressure in the grease piston is relieved. An AC/DC solid-state electronic drive logic system which provides the operator with three speed ranges:-

(a) High speed which moves the miner at a rate of 26 metres/min, used mainly for flitting from one working face to another.

(b) Intermediate speed at a rate of 13 metres/min, used mainly for rapid re-positioning of the miner within the face area.

(c) Sump speed, fully adjustable by the operator to a preset value ranging from 0 to 10 metres/min for sumping the miner into the coal face. The adjustable sump speed setting allows the operator to select an optimum cutting speed when face hardness conditions vary, eg. Rock inclusions or roof/floor cutting.

The traction drive control system provides the operator with the capability to run either RH or LH crawler chain in forward or reverse independently for maximum manoeuvrability, i.e. the miner may be pivoted about its central vertical axis. The RH and LH drive trains are each equipped with fully enclosed multiple-disc fail-safe hydraulic flushed parking brakes that are spring-applied and hydraulically released.

The crawler chains are manufactured from high-alloy wear-resistant steel for maximum life, and are equipped with grouser ridges to enhance traction in both soft and hard floor conditions.

Hydraulic System - CLA

The 30MB3 hydraulic systems is fed from the main reservoir contained as an integral part of the main chassis structure. Capacity of the reservoir is 750 litres; capacity of the total system including the main reservoir, full cylinders, hoses, etc is 1000 litres. Hydraulic oil level in the reservoir can be monitored by sight glasses are which are fitted on either side of the mainframe beside traction motors and the tank is equipped with an oil level float switch which shuts off the machine operation in the event that reservoir level goes below a safe limit. Hydraulic power for the miner is provided by two 67 kW water-cooled AC electric motors which drives two (2) Rexroth load sencing variable displacement hydraulic pumps. The RH pump delivers oil to the main control valve for hydraulic mining functions. The LH pump delivers oil to the drill rigs and the rib protection system when switched into bolting modes. The pump/ motor assembly are located within the RH and LH crawler frames. The pumps provide 260 Litres/min @ a maximum pressure of 200 BAR.

Helensburgh 30MB3 Maintenance Manual

Main Valve Bank

Helensburgh 30MB3 Maintenance Manual

Helensburgh 30MB3 Maintenance Manual

Hydraulic Schematic

• Thank you very much for reading the preview of the manual.

• You can download the complete manual from: www.heydownloads.com by clicking the link below

• Please note: If there is no response to CLICKING the link, please download this PDF first and then click on it.