China Professional Casting Steel Large Module Herringbone Girth Gear of Rotary Klin worm gearbox

Product Description

                Casting Steel Large Module Herringbone Girth Gear of Rotary Klin
 
  

Process: 
Forging/Casting
Normalizing&Tempering-Proof Machinnig
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
–Cement Plant
–Port Machinery
–Oil and natural
–Paper making
–OEM gear case
–General Industrial

Specification Machining Scope
Size OD Max 16m
One Piece of Gear: OD Max 13m
Assemble Gear: According to drawings
Hobbing Modulus 10-60
Milling Modulus Up to 120
Spiral Modulus 1-15
Accuracy Grade Milling: 6 grade
Hobbing: 8 grade
Material Alloy steel: 42CrMo4, 34CrNiMo6 etc.
Carbon steel: C45E, 1030
Carburizing steel
Quenched and tempered steel
Heat treatment Quenching & Tempering, Surface Quenching
Teeth Profile Spur, Helical, Herringbone, Crown, Spiral, Worm and shaft 

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

 Testing Process:
· QA DOC: Chemical Composition Report, Mechanical Properties Report, UT Report, Heat Treatment Report, Dimensions Check Report
· The data on chemical composition report and mechanical properties report are approved by third party, HangZhou Ship Material Research Institute, CSIC.
· UT test: 100% ultrasonic test according to EN15718-3, SA388, Sep 1921 C/c etc.
· Heat Treatment Report: provide original copy of heat treatment curve/time table.

Our company appearance:

Why Choose us?

1.Pre-sale services: enthusiasm
We provide you with the prophase plan, process flow design and manufacturer equipment according to your special demand.
2.one-year warranty to make sure your machine runs consistently.
We always offering lifelong services and provide spare parts for a long term,and repair main parts under right using for free in one years.
3.Technical services
3.1 Design of production line and solutions according to buyer’s requirement. 
3.2 In 7 days after the receipt of deposit, the seller shall provide related technical documents for equipment installation, in addition to those with special requirements.
3.3 Before delivery, the seller can modify the previous solutions according to buyer’s requirement.   
4.After-sales service
4.1 During the installation and commissioning, the seller shall send technician to the site for instruction of installation and commissioning, and for training of workers. 
4.2 If there is any equipment failure caused by the buyer, the seller shall assist the maintenance of machines and replacement of fittings, and charges appropriate fees. 
4.3 Beyond the guarantee period, the seller can provide services and fittings at a most preferential price. 
4.4The seller can provide consultation and inspection services freely for other products, especially for the up-stream and down-stream products of our equipment.

Application: Machinery, Ball Mill and Rotary Kiln
Hardness: Hardened Tooth Surface
Gear Position: External Gear
Manufacturing Method: Hobbing
Toothed Portion Shape: Double Helical Gear
Material: Cast Steel
Customization:
Available

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Customized Request

herringbone gear

What are the benefits of using a herringbone gear mechanism?

Using a herringbone gear mechanism offers several benefits due to its unique design and characteristics. Here’s a detailed explanation of the advantages of using a herringbone gear mechanism:

  • High Load Capacity: Herringbone gears are capable of handling high torque loads due to their double helical tooth design. The opposing helix angles of the two sides of the gear create a balanced load distribution, allowing for increased load-carrying capacity compared to other gear types. This makes herringbone gears suitable for applications that involve heavy loads and high power transmission requirements.
  • Bidirectional Power Transmission: Herringbone gears are capable of transmitting power in both directions. The double helical tooth profile cancels out axial thrust forces that would occur in single helical gears, allowing for bidirectional power transfer without the need for additional thrust bearings or special mechanisms. This feature is particularly advantageous in applications where reversible power transmission is required.
  • Smooth and Quiet Operation: The double helical tooth design of herringbone gears helps to cancel out axial and radial forces, resulting in smooth and quiet operation. The opposing helix angles of the two sides of the gear minimize gear vibrations and reduce noise levels during engagement. This makes herringbone gears suitable for applications where low noise and vibration are desired, such as precision machinery, printing presses, and automotive transmissions.
  • Improved Gear Tooth Strength: The double helical tooth design of herringbone gears provides enhanced tooth strength compared to single helical gears. The opposing helix angles create a self-centering effect that reduces tooth deflection and improves load distribution along the tooth surfaces. This results in increased tooth strength, reduced wear, and improved overall gear durability, making herringbone gears suitable for high-load and high-speed applications.
  • Efficient Torque Transfer: Herringbone gears offer efficient torque transfer due to their large contact area and overlapping tooth engagement. The double helical tooth profile provides a larger contact ratio compared to spur gears, resulting in improved power transmission efficiency and reduced stress concentrations on the gear teeth. This efficient torque transfer contributes to the overall performance and energy efficiency of the gear system.
  • Axial Thrust Elimination: The double helical tooth profile of herringbone gears allows for the cancellation of axial thrust forces. The opposing helix angles create equal and opposite axial forces, effectively eliminating the net axial thrust on the gear shaft. This eliminates the need for additional thrust bearings or special provisions to counteract axial loads, simplifying the gear system design and reducing complexity and cost.

These are some of the key benefits of using a herringbone gear mechanism. Their high load capacity, bidirectional power transmission capability, smooth and quiet operation, improved tooth strength, efficient torque transfer, and axial thrust elimination make them advantageous in a wide range of applications across various industries.

herringbone gear

What are the advantages and disadvantages of using herringbone gears?

Herringbone gears offer several advantages and disadvantages that should be considered when evaluating their suitability for a specific application. Here’s a detailed explanation of the advantages and disadvantages of using herringbone gears:

Advantages of Herringbone Gears:

  • Reduced Friction: The double helical arrangement of the teeth in herringbone gears helps cancel out axial thrust and minimize sliding friction during gear meshing. This results in reduced frictional losses, improving overall efficiency and reducing energy consumption.
  • Smooth Operation: Herringbone gears provide smooth and quiet operation due to their gradual meshing and unmeshing characteristics. The opposing helix angles of the teeth enable smooth tooth engagement, reducing impact and vibrations, and enhancing overall system performance.
  • High Torque Capacity: Herringbone gears have a larger surface area of contact compared to spur gears, allowing them to transmit higher torque loads. This higher torque capacity enables the use of more compact gear designs and reduces the need for additional gear stages, resulting in space and weight savings.
  • Better Load Distribution: The double helical tooth arrangement in herringbone gears distributes the load more evenly across the gear face. This improves load-bearing capabilities, reduces stress concentrations, and enhances gear life and durability.
  • Improved Alignment: Herringbone gears are self-aligning to a certain extent due to their double helical structure. This makes them more forgiving of minor misalignments, simplifying the alignment process during installation and reducing the risk of gear tooth damage.
  • No Axial Thrust: The opposing helix angles of the teeth in herringbone gears cancel out the axial thrust. This eliminates the need for additional thrust bearings or complicated thrust balancing mechanisms, simplifying the overall gear system design.

Disadvantages of Herringbone Gears:

  • Complex Manufacturing: Herringbone gears are more complex to manufacture compared to spur gears. The double helical tooth profile requires precise machining and specialized manufacturing processes, which can increase production costs.
  • Tighter Tolerance Requirements: The double helical tooth profile of herringbone gears requires tight manufacturing tolerances to ensure proper gear meshing and alignment. This may require more stringent quality control measures during production and assembly.
  • Increased Axial Space: Herringbone gears require additional axial space compared to spur gears due to their double helical structure. This can be a constraint in applications with limited axial space availability, requiring careful consideration during system design.
  • Higher Complexity in Gearbox Design: Incorporating herringbone gears into a gearbox design can add complexity to the overall system. The need for proper gear alignment, balancing, and lubrication may require more sophisticated gearbox configurations and maintenance procedures.
  • Specialized Maintenance: Herringbone gears may require specialized maintenance procedures, such as gear tooth inspection, alignment checks, and lubrication. This can involve additional time and effort compared to simpler gear systems.

When considering the use of herringbone gears, it is essential to evaluate the specific requirements of the application, including load capacity, operating conditions, space constraints, and cost considerations. Proper design, manufacturing, and maintenance practices can help leverage the advantages of herringbone gears while mitigating their disadvantages.

herringbone gear

What are the applications of herringbone gears?

Herringbone gears, also known as double helical gears, find applications in various industries due to their unique design and advantages. Here’s a detailed explanation of the applications of herringbone gears:

  • Power Transmission Systems: Herringbone gears are commonly used in power transmission systems that require efficient torque transfer and smooth operation. They are employed in gearboxes, drivetrains, and speed reducers where high torque and bidirectional power transmission are critical.
  • Heavy Machinery: Herringbone gears are found in heavy machinery such as construction equipment, mining machinery, and industrial machinery. These gears can handle large loads and provide reliable torque transmission, making them suitable for applications that involve heavy-duty operations.
  • Oil and Gas Industry: The oil and gas industry extensively uses herringbone gears in equipment like pumps, compressors, and turbines. These gears are capable of handling high torque requirements and provide reliable performance in demanding environments.
  • Marine Propulsion Systems: Herringbone gears are utilized in marine propulsion systems, including ship propulsion drives and propeller shaft arrangements. Their ability to transmit high torque efficiently and smoothly makes them ideal for marine applications.
  • High-Speed Gearboxes: Herringbone gears are employed in high-speed gearboxes where torque is transmitted at high rotational speeds. They are used in applications such as wind turbine gearboxes, aerospace systems, and high-performance automotive transmissions.
  • Metalworking Machinery: Herringbone gears are utilized in metalworking machinery, such as milling machines, lathes, and gear cutting machines. These gears provide precise and reliable power transmission, enabling the machinery to perform various machining operations with accuracy.
  • Railway Systems: Herringbone gears find applications in railway systems, particularly in locomotives and rolling stock. They facilitate efficient power transfer and contribute to smooth and reliable train operation.
  • Printing Presses: Herringbone gears are used in printing presses to transmit power between different components of the press. Their ability to minimize vibrations and noise is advantageous in printing applications that require precision and high-quality printing results.
  • Steel Mills: Herringbone gears are employed in steel mills for various applications, including rolling mills, heavy-duty cranes, and gear couplings. These gears withstand the demanding conditions of steel manufacturing, such as high loads, vibrations, and harsh environments.

These are just a few examples of the applications of herringbone gears. Their unique tooth design, load-carrying capacity, bidirectional power transmission capability, and smooth operation make them suitable for a wide range of industries and applications that require efficient and reliable torque transmission.

China Professional Casting Steel Large Module Herringbone Girth Gear of Rotary Klin worm gearboxChina Professional Casting Steel Large Module Herringbone Girth Gear of Rotary Klin worm gearbox
editor by CX 2023-09-04