Cantilever roadheader shall simultaneously realize the functions of stripping coal and rock, loading and transportation, travel adjustment of the machine itself, and spray dust removal, that is, it integrates cutting, loading, transportation, and walking. It mainly consists of cutting mechanism, loading mechanism, transportation mechanism, walking mechanism, frame and turntable, hydraulic system, electrical system, cooling and dust suppression water supply system, and operation control system. The main working mechanisms include cutting arm, rotary table, slag loading plate, conveyor, transfer machine, track, etc.
Main characteristics of cantilever tunneling machine：
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The cantilever tunneling machine can only cut a partial section of the roadway. To break the entire rock section, the cutting head needs to be continuously moved up, down, left, and right multiple times to complete the work. Can be used for tunnels of any cross-sectional shape;
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The excavation speed is greatly affected by the utilization rate of the tunneling machine, which can reach around 60% under optimal conditions. However, if the rock requires support or other auxiliary work that cannot keep up, the utilization rate is even lower;
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There are some advantages similar to full face tunneling machines: continuous excavation, no blasting vibration, and the ability to more freely determine the appropriate timing for supporting rocks; Can reduce over excavation; Can save the cost of rock support and lining;
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Compared with full section tunneling machines, cantilever tunneling machines are compact and have greater flexibility in tunnels, and can be used for any type of support;
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Compared with full section tunneling machines, it has significant characteristics such as low investment, short construction preparation time, and high reusability.
Performance characteristics:
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Reasonable matching of the whole machine, good reliability, low center of gravity, and good stability;
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The cutting section adopts a vibration mechanism with strong rock breaking ability;
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The friction plate structure of the walking part is reliable in performance and requires minimal maintenance;
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Each component adopts a long-life and high-strength structural design;
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Loading and transportation are directly driven by hydraulic motors, with a low failure rate;
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Modularization of electrical control and protection functions;
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The key components are sourced from well-known international and domestic brands.
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project
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unit
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Technical parameter values
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PRODUCT MODEL
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roadheaderHLZ-75
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External dimensions（A×M×H）
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m
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8.29×2.5×1.5
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Blade width(N)
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m
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2.5
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Track outer width(M)
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m
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1.78
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Total installed power
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kW
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130
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Whole machine weight
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t
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25.3
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Maximum excavation height(D)
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m
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3.6
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Maximum positioning excavation width(2W)
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m
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5.0
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Economic cutting section
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m²
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6～17
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Excavation section shape
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arbitrary
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Gradeability
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°
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±18
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Uniaxial compressive strength of cuttable rocks
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MPa
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≤50
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Ground gap
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mm
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180
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Maximum diameter of cutting head
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mm
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Φ880
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Cutting motor power
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kW
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75
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Cutting head speed
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r/min
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50
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Expansion distance
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mm
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500
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Maximum undercover depth
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mm
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250
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Loading form
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Star wheel
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Star wheel speed
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r/min
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29
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Conveyor form
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Edge double circular chain scraper type
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Conveyor chain speed
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m/s
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0.9
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Conveyor trough width
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mm
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500
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Transportation capacity
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m³/h
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168
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Walking form
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crawler-type
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Walking speed
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m/min
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3.2/6
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Maximum traction force of the track
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kN
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130
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Average ground voltage ratio
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MPa
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0.12
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Pump station power
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kW
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55
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Rated working pressure
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MPa
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16
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Working medium
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N68#Anti wear hydraulic oil
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External spray pressure
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MPa
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≥1.5
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Internal spray pressure
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MPa
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≥3.0
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total flow
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L/min
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≥35
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Supply Voltage
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V
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1140/660
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Total control power
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kW
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130
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Lighting voltage
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V
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36
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Explosion proof form
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Explosion proof and intrinsic safety type
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Can be equipped with bridge type reprinting machine
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m
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7.5～17.5
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Note: The above parameters can be designed according to user requirements, and our company reserves the right to make timely changes. This article is from:Hubei Hengli Engineering Machinery Co., LtdPlease indicate the source when reprinting! Hubei Hengli Heavy Industry focuses on underground operationsscraperSeriesMining loaderSeries, tire type, steep track typecrawler loader(Mining slag scraper、Wheel scraper、Crawler scraper、Inclined shaft scraper）The series of engineering machinery and equipment, including the curved track side dumping dump truck series, fully hydraulic excavation drilling truck series, and mining excavation machine series, are distributed throughout the country and exported to both domestic and foreign markets, earning high praise and trust from users!
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