Product Description
Large Diameter Cast Steel Spur Girth Gear for Ball Mill
CITICTIC is the casting & forging center in central-south China, possessing 50t electric arc furnace, 60t LF ladle refining furnace, and 60t VD/VOD refining furnace, etc. We can pour 350t liquid steel 1 time and yields more than 200,000t of high quality liquid steel and can produce the high quality steel of more than 260 steel grades such as carbon steel, structural alloy steel and the structural steel, refractory steel and stainless steel of special requirement. The maximum weight of casting, gray casting, graphite cast iron and non-ferrous casting is 200t, 30t, 20t and 205t separately.
Features:
Module Range: 10 Module to 70 Module.
Diameter: Min 800mm to16000 mm.
Weight: Max 120 MT single piece.
Three different designs: Fabricated steel – forged ring – rolled plate
Standards / Certificates: • CHINAMFG EN ISO • AWS • ASTM • ASME • DIN
Advantages:
– Products with Customers’ Designs
– Strong Machining & Heat Treatment Abilities
– Strict Quality Control
– Prompt Delivery
– Experience in Cooperation with Fortune 500 Companies
Process:
Forging / Casting
Normalizing & Tempering-Proof Machining
Quenching & Tempering
Finish Machining (Teeth Grinding)
We can offer you in various process conditions solutions for Many End Markets and Applications
–Mining
–Metallurgy
–Power Generation
–Sugar
–Cement Plant
–Port Machinery
–Oil and natural
–Papermaking
–OEM gear case
–General Industrial
Specifications Of Gear:
No. | Item | Description |
1 | Diameter | ≤15m |
2 | Module | ≤45 |
3 | Material | Cast Alloy Steel, Cast Carbon Steel, Forged Alloy Steel, Forged Carbon Steel |
4 | Structure From | Integrated, Half to Half, Four Pieces and More Pieces |
5 | Heat Treatment | Quenching & Tempering, Normalizing & Tempering, Carburizing & Quenching & Tempering |
6 | Tooth Form | Annular Gear, Outer Gear Ring |
7 | Standard | ISO, EN, DIN, AISI, ASTM, JIS, IS, GB |
Inspection And Test Outline Of Girth Gear:
No. | Item | Inspection Area | Acceptance Criteria | Inspection Stage | Certificates |
1 | Chemical Composition |
Sample | Material Requirement | When Smelting After Heat Treatment |
Chemical Composition Report |
2 | Mechanical Properties |
Sample (Test Bar on the Gear Body) | Technical Requirement | After Heat Treatment | Mechanical Properties Report |
3 | Heat Treatment |
Whole Body | Manufacturing Standard | During Heat Treatment | Heat Treatment Report Curves of Heat Treatment |
4 | Hardness Test |
Tooth Surface, 3 Points Per 90° | Technical Requirement | After Heat Treatment | Hardness Teat Report |
After Semi Finish Machining | |||||
5 | Dimension Inspection |
Whole Body | Drawing | After Semi Finish
Machining |
Dimension Inspection Report |
Finish Machining | |||||
6 | Magnetic Power Test (MT) | Tooth Surface | Agreed Standard | After Finish Gear Hobbing |
MT Report |
7 | UT | Spokes Parts | Agreed Standard | After Rough Machining | UT Report |
After Welded | |||||
After Semi Finish Machining | |||||
8 | PT | Defect Area | No Defect Indicated | After Digging After Welded |
PT Record |
9 | Mark Inspection | Whole Body | Manufacturing Standard | Final Inspection | Pictures |
10 | Appearance Inspection | Whole Body | CIC’s Requirement | Before Packing (Final Inspection) | |
11 | Anti-rust Inspection |
Whole Body | Agreed Anti-rust Agent | Before Packing | Pictures |
12 | Packing Inspection |
Whole Body | Agreed Packing Form | During Packing | Pictures |
Facilities For Manufacturing Gear Ring:
No | Item | Description |
1 | Smelting & Casting Capability | 40t, 50t, 80t Series AC Electric Arc Furnace 2×150t, 60t LF Ladle Refining Furnace 150t, 60t Series VD / VOD Furnace 20×18m Large Pouring Facility We can pour 900t refining liquid steel 1 time, and achieve vacuum poured 600t steel ingots. We can produce the high quality steel of more than 260 steel grades as carbon steel, structural alloy steel and the structural steel, refractory steel and stainless steel of special requirement. The maximum weight of casting steel, gray casting, graphite cast iron and non-ferrous casting is 600t, 200t, 150t and 20t separately. |
2 | Forging Capability | The only 1 in the word, the most technologically advanced and the largest specification18500t Oil Press, equipped with 750t.m forging operation machine 8400t Water Press 3150t Water Press 1600t Water Press Φ5m High Precision Ring Mill (Germany) Φ12m High Precision Ring Mil We can roll rings of different sections of carbon steel, alloy steel, high temperature alloy steel and non-ferrous alloys such as copper alloy, aluminum alloy and titanium alloy. Max. Diameter of rolled ring will be 12m. |
3 | Heat Treatment Capability | 9×9×15m, 8×8×12m, 6×6×15m, 15×16×6.5m, 16×20×6m, 7×7×17m Series Heat CHINAMFG and Heat Treatment Furnaces φ2.0×30m, φ3.0×5.0m Series Heat Treatment Furnaces φ5.0×2.5m, φ3.2×1.5m, φ3.0×5.0m, φ2.0×5m Series Carburizing Furnaces & Nitriding Furnaces & Quenching Bathes φ2.0×30m Well Type CNC Electrical Furnaces Φ3.0×5.0M Horizontal Gas Temperature-differential Furnace Double-frequency and Double-position Quenching Lathe of Pinion Shaft |
The delivery site of the large gear ring of our Vietnamese customer last month:
Type: | Clay Dry Sand |
---|---|
Casting Method: | Vacuum Aspirated Casting |
Sand Core Type: | Clay Sand Core |
Application: | Machinery Parts |
Machining: | CNC Machining |
Material: | Cast Steel, Forged Steel |
Customization: |
Available
| Customized Request |
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How do you calculate the efficiency of a spur gear?
Calculating the efficiency of a spur gear involves considering the power losses that occur during gear operation. Here’s a detailed explanation:
In a gear system, power is transmitted from the driving gear (input) to the driven gear (output). However, due to various factors such as friction, misalignment, and deformation, some power is lost as heat and other forms of energy. The efficiency of a spur gear represents the ratio of the output power to the input power, taking into account these power losses.
Formula for Calculating Gear Efficiency:
The efficiency (η) of a spur gear can be calculated using the following formula:
η = (Output Power / Input Power) × 100%
Where:
η is the efficiency of the gear system expressed as a percentage.
Output Power is the power delivered by the driven gear (output) in the gear system.
Input Power is the power supplied to the driving gear (input) in the gear system.
Factors Affecting Gear Efficiency:
The efficiency of a spur gear is influenced by several factors, including:
- Tooth Profile: The tooth profile of the gear affects the efficiency. Well-designed gear teeth with accurate involute profiles can minimize friction and power losses during meshing.
- Lubrication: Proper lubrication between the gear teeth reduces friction, wear, and heat generation, improving gear efficiency. Insufficient or inadequate lubrication can result in increased power losses and reduced efficiency.
- Gear Material: The selection of gear material affects efficiency. Materials with low friction coefficients and good wear resistance can help minimize power losses. Higher-quality materials and specialized gear coatings can improve efficiency.
- Gear Alignment and Meshing: Proper alignment and precise meshing of the gear teeth are essential for optimal efficiency. Misalignment or incorrect gear meshing can lead to increased friction, noise, and power losses.
- Bearing Friction: The efficiency of a gear system is influenced by the friction in the bearings supporting the gear shafts. High-quality bearings with low friction characteristics can contribute to improved gear efficiency.
- Load Distribution: Uneven load distribution across the gear teeth can result in localized power losses and reduced efficiency. Proper design and gear system configuration should ensure even load distribution.
Interpreting Gear Efficiency:
The calculated gear efficiency indicates the percentage of input power that is effectively transmitted to the output. For example, if a gear system has an efficiency of 90%, it means that 90% of the input power is converted into useful output power, while the remaining 10% is lost as various forms of power dissipation.
It’s important to note that gear efficiency is not constant and can vary with operating conditions, lubrication quality, gear wear, and other factors. The calculated efficiency serves as an estimate and can be influenced by specific system characteristics and design choices.
By considering the factors affecting gear efficiency and implementing proper design, lubrication, and maintenance practices, gear efficiency can be optimized to enhance overall gear system performance and minimize power losses.
How do you maintain and service a spur gear system?
Maintaining and servicing a spur gear system is crucial to ensure its optimal performance, longevity, and reliability. Here’s a detailed explanation of how to maintain and service a spur gear system:
- Regular Inspection: Perform regular inspections of the spur gear system to identify any signs of wear, damage, misalignment, or abnormal operating conditions. Inspect the gear teeth, shafts, bearings, and housing for any visible issues. Pay attention to unusual noises, vibrations, or changes in gear performance. Early detection of problems allows for timely intervention and prevents further damage.
- Cleaning: Keep the spur gear system clean by removing any dirt, debris, or contaminants that may accumulate on the gear surfaces or within the gear housing. Use appropriate cleaning methods such as brushing, wiping, or blowing with compressed air. Avoid using harsh chemicals that may damage the gear components or compromise lubrication.
- Lubrication: Ensure proper lubrication of the spur gear system as per the manufacturer’s recommendations. Regularly check the lubricant levels and condition. Monitor viscosity, contamination levels, and oxidation of the lubricant. Replenish or replace the lubricant as necessary to maintain optimal gear lubrication and protection against wear.
- Alignment Check: Periodically check the shaft alignment of the gear system to ensure proper alignment. Misaligned shafts can result in increased wear, noise, and reduced gear efficiency. Use alignment tools such as dial indicators or laser alignment systems to verify and adjust the shaft alignment if needed.
- Torque and Fastener Check: Check the torque of fasteners, including bolts, set screws, and retaining rings, to ensure they are properly tightened. Loose fasteners can lead to gear misalignment and compromised performance. Follow the manufacturer’s recommended torque values for the specific gear system components.
- Replacement of Worn Components: Over time, gear components such as gear teeth, bearings, or shafts may wear out or become damaged. Replace any worn or damaged components promptly to prevent further issues and maintain the gear system’s functionality. Use genuine replacement parts recommended by the gear manufacturer.
- Monitoring Operating Conditions: Monitor the operating conditions of the gear system, including temperature, load, and speed. Ensure that the gear system operates within the specified limits and does not exceed the design parameters. Excessive heat, overloading, or high-speed operation can accelerate wear and reduce gear life.
- Training and Expert Support: Ensure that personnel responsible for maintaining and servicing the spur gear system receive proper training and have access to expert support. Familiarize yourself with the gear system’s documentation, including maintenance manuals, technical specifications, and troubleshooting guides. Consult with gear manufacturers or specialists for guidance on specific maintenance procedures or complex issues.
Developing a regular maintenance schedule and keeping accurate records of maintenance activities can help ensure consistent and effective servicing of the spur gear system. Adhering to recommended maintenance practices and addressing any identified issues promptly will help optimize the performance, reliability, and service life of the gear system.
It’s important to note that maintenance and servicing procedures may vary depending on the specific gear system, application, and manufacturer’s recommendations. Therefore, always refer to the gear system’s documentation and consult with the manufacturer for detailed maintenance instructions.
What industries commonly use spur gears?
Spur gears find wide applications across various industries due to their simplicity, efficiency, and versatility. Here’s a detailed explanation of the industries that commonly use spur gears:
- Automotive Industry: The automotive industry extensively utilizes spur gears in various components and systems. They are commonly found in gearboxes, differentials, transmission systems, and engine timing mechanisms. Spur gears play a crucial role in transferring power and rotational motion between the engine, wheels, and other drivetrain components.
- Machinery and Manufacturing: Spur gears are widely employed in machinery and manufacturing equipment across different sectors. They are used in conveyor systems, machine tools, printing presses, textile machinery, packaging machinery, and a variety of industrial applications. Spur gears facilitate power transmission and motion control in these systems.
- Power Generation: Spur gears are essential in power generation systems such as wind turbines, hydroelectric turbines, and steam turbines. They are used to transmit power from the rotor to the generator, converting the rotational motion of the turbine blades into electricity. Spur gears enable efficient power transfer in these renewable energy systems.
- Robotics and Automation: Spur gears have significant applications in robotics and automation systems. They are used in robotic joints, actuators, and drive systems to control motion and transmit torque accurately and efficiently. Spur gears enable precise movement and force transmission in robotic applications.
- Aerospace and Aviation: The aerospace and aviation industries utilize spur gears in various applications. They can be found in aircraft landing gear systems, engine components, flight control systems, auxiliary power units (APUs), and other critical equipment. Spur gears play a vital role in transmitting power and controlling movement in these aerospace systems.
- Marine and Shipbuilding: Spur gears are commonly used in the marine and shipbuilding industry. They find applications in propulsion systems, winches, steering mechanisms, and other equipment that require torque transmission and speed control. Spur gears enable efficient power transfer and maneuverability in marine vessels.
- Appliances and Household Equipment: Spur gears are present in numerous household appliances and equipment. They are used in washing machines, dishwashers, mixers, food processors, garage door openers, and many other appliances that require rotational motion and power transmission. Spur gears facilitate the efficient operation of these household devices.
- Power Tools: Spur gears are widely utilized in power tools such as drills, saws, grinders, and sanders. They enable the transmission of power from the motor to the tool’s cutting or grinding components, ensuring efficient and controlled operation. Spur gears contribute to the functionality and performance of power tools.
- Medical Equipment: Spur gears are used in various medical devices and equipment. They can be found in imaging systems, surgical robots, medical pumps, and other applications that require precise motion control and torque transmission. Spur gears play a critical role in the functioning of medical equipment.
- Clocks and Watches: Spur gears are a fundamental component in mechanical clocks and watches. They are responsible for accurate timekeeping by transferring rotational motion from the mainspring or oscillator to the hour, minute, and second hands. Spur gears have historical significance in timekeeping mechanisms.
These are just a few examples of the industries where spur gears are commonly used. Their simplicity, reliability, and efficiency make them a popular choice in a wide range of applications, enabling power transmission, motion control, and precise operation in diverse industrial sectors.
editor by CX 2023-11-01