Editorial Technical Reference

House (Upper Structure)

This page explains how House (Upper Structure) is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The rotating upper platform of a dragline excavator that houses the machinery and operator's cab.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for House (Upper Structure)

Definition
The House, or Upper Structure, is the rotating superstructure of a dragline excavator mounted on the crawler base. It contains all major machinery components including the hoist and drag winches, swing machinery, power plant (diesel engine or electric motor), operator's cab with controls, and often the boom foot mounting. This structure rotates 360 degrees on the base to position the boom and bucket for digging and dumping operations. The House is fabricated from high-strength steel plate and structural steel beams, providing the necessary rigidity to support heavy loads and dynamic forces during operation. Key parameters include a rated load capacity of 50–100 t, swing speed of 0–2.5 r/min, swing torque of 1000–3000 kN·m, operating pressure of 25–35 MPa, operating temperature range of -20 to 50 °C, ingress protection rating of IP54–IP65 (IEC 60529), material grade Q345B–Q460C (GB/T 1591), weight of 20–60 t, footprint of 6–12 m × 3–5 m, and swing bearing diameter of 2–4 m. These values are reference ranges and must be verified for the specific model and application. The House is a critical component that interfaces with the crawler base via a slewing ring, and its design must account for structural integrity, fatigue life, and maintenance accessibility. Proper installation and alignment are essential to ensure smooth rotation and safe operation. Regular inspection of the swing bearing, gearbox, and structural welds is recommended to detect wear or cracks early. The House is not a standalone product; it is part of a larger dragline excavator system and must be selected based on the machine's overall specifications and intended use. Buyers should consult the original equipment manufacturer (OEM) for detailed engineering data, installation requirements, and compliance with relevant standards.
Working Principle
The House rotates on a large slewing ring (turntable bearing) mounted on the crawler base. Powered by swing motors and reduction gears, it allows the entire upper assembly to pivot horizontally. This rotation, combined with boom movement and cable operations, enables precise positioning of the bucket throughout the digging cycle. The swing speed and torque are controlled by the hydraulic system, which operates at a pressure of 25–35 MPa. The rotation is smooth and continuous, allowing for efficient material handling. The House's structural design ensures stability and load distribution, while the ingress protection rating safeguards internal components from dust and water ingress. The operating temperature range defines the environmental limits for reliable performance. The swing bearing diameter and footprint determine the machine's footprint and stability. Proper lubrication and maintenance of the swing gear are essential for long service life.
Common Materials
High-strength steel plate, Structural steel beams
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Load Capacity50–100 tMaximum load the upper structure can support
Swing Speed0–2.5 r/minRotational speed of the upper structure
Swing Torque1000–3000 kN·mTorque available for rotating the upper structure
Operating Pressure25–35 MPaHydraulic system pressure
Operating Temperature-20–50 °CAmbient temperature range for operation
Ingress ProtectionIP54–IP65Protection against dust and waterIEC 60529
Material GradeQ345B–Q460CHigh-strength structural steelGB/T 1591
Weight20–60 tWeight of the upper structure
Footprint (Length × Width)6–12 × 3–5 mOverall dimensions of the upper structure
Swing Bearing Diameter2–4 mDiameter of the swing bearing

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Slewing Ring
    Large bearing that allows 360-degree rotation of the upper structure on the base
    Material: Alloy steel
  • Machinery Deck
    Platform that supports and houses the winches, power plant, and other machinery
    Material: Steel plate with reinforcement
  • Operator's Cab
    Enclosed control station for the operator with visibility and environmental controls
    Material: Steel frame with safety glass
  • Swing Gearbox
    Transmits power from swing motors to the slewing mechanism for rotation
    Material: Cast steel housing, alloy steel gears
  • Counterweight Frame Part
    Structure at the rear of the house that supports counterweights for balance
    Material: Structural steel
  • Swing Motors
    Drive the swing gearbox that turns the house on the slewing ring.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for House (Upper Structure).

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (sealed cabin pressure maintained at 1 atm ±5%)
other spec: Max rotational speed: 0.5 RPM continuous, 1.0 RPM peak; Max payload capacity: 50-500 metric tons depending on model; Power input: 400V-690V AC, 50/60Hz
temperature: -20°C to +50°C (operational ambient)
Media Compatibility
✓ Open-pit mining environments ✓ Coal and mineral excavation sites ✓ Civil engineering projects with stable ground conditions
Unsuitable: Offshore/marine environments (due to corrosion and dynamic loading)
Sizing Data Required
  • Dragline boom length and bucket capacity (determines torque requirements)
  • Site ground bearing pressure (affects foundation and stabilization needs)
  • Required slewing speed and positioning accuracy for operational efficiency

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Structural fatigue cracking
Cause: Cyclic loading from wind, thermal expansion/contraction, and occupant activities leading to stress concentration at joints and connections
Foundation settlement/differential movement
Cause: Inadequate soil compaction, poor drainage causing soil erosion, or changes in moisture content leading to uneven support
Maintenance Indicators
  • Visible cracks in walls or ceilings wider than 1/8 inch, especially diagonal cracks at corners of doors/windows
  • Doors/windows that no longer open/close properly or floors that feel uneven/sloping
Engineering Tips
  • Implement regular structural inspections focusing on load-bearing elements, connections, and foundation perimeter for early crack detection
  • Maintain proper drainage systems and gutter/downspout functionality to prevent water accumulation near foundation

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASTM E119 - Standard Test Methods for Fire Tests of Building Construction and Materials EN 1990 - Eurocode: Basis of Structural Design

Quoted from the published standard.

Manufacturing Precision
  • Vertical Alignment: +/- 5mm per 3m height
  • Wall Flatness: 3mm deviation over 2m length
Quality Inspection
  • Load Testing for Structural Integrity
  • Thermal Imaging for Insulation and Moisture Detection

Manufacturers of House (Upper Structure)

Manufacturer profiles associated with House (Upper Structure).

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Frequently Asked Questions

What is the function of the House in a dragline excavator?

The House, or upper structure, is the rotating platform that houses all major machinery components, including winches, power plant, and operator's cab. It rotates 360 degrees on the crawler base to position the boom and bucket for digging and dumping operations.

What materials are used to fabricate the House?

The House is typically fabricated from high-strength steel plate and structural steel beams. The material grade may range from Q345B to Q460C, as per GB/T 1591, but the exact grade must be confirmed for the specific model.

What are the key parameters to verify when selecting a House?

Key parameters include rated load capacity (50–100 t), swing speed (0–2.5 r/min), swing torque (1000–3000 kN·m), operating pressure (25–35 MPa), operating temperature (-20 to 50 °C), ingress protection (IP54–IP65), weight (20–60 t), footprint (6–12 m × 3–5 m), and swing bearing diameter (2–4 m). These are reference ranges and must be verified with the manufacturer.

How is the House maintained?

Regular inspection of the swing bearing, gearbox, and structural welds is recommended. Lubrication of the swing gear and checking for wear or cracks are essential. The operating environment should be within the specified temperature range, and the ingress protection rating should be maintained to prevent contamination.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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