Product Description

LLA Type Tyre Coupling(JB/T10541-2005)

Product Description

 

♦Description
The LLA Flexible Tyre Coupling is a kind of high elastic coupling, with good damping buffer and superior offset compensation performance.
The working temperature of 20~80 degrees Celsius, transmitting torque 10~20000NM, suitable for damp, dust, shock, vibration, reversing the changeable and frequent starting working conditions, and convenient assembly and disassembly, no lubrication, durable and reliable. Non standard couplings are made in accordance with special needs. In overloading work and half coupling, there will be no malignant accidents. ♦ Main Dimension and Parameter

Type	Main dimension			Number of screws Md×L	Shaft hole diameter d dz	Shaft hole length		Allowable Torque	Allowable Speed	Rotary inertia	Mass
	D	D1	S			L	L1	Tn	(n)	kg·m2	kg
						Y J1 J	Z	N·m	r/min
LLA1	60	20	4	12-M4×10	6-11	16-25	–	10	5000	0.0004	0.35
LLA2	100	36	8	12-M6×20	8-19	14-42	35	20	5000	0.005	1.33
LLA3	135	48	12	12-M8×25	18-28	30-62	35-50	80	4000	0.571	3.4
LLA4	180	64	18	12-M10×30	25-38	44-82	50-65	160	3150	0.071	7.4
LLA5	210	80	18	16-M10×40	32-50	60-112	65-90	315	2800	0.154	13.4
LLA6	265	100	24	16-M12×40	40-56	84-112	90	630	2500	0.46	22.6
LLA7	310	120	28	16-M16×50	48-75	84-142	90-120	1250	2000	1.86	34.8
LLA8	400	150	38	16-M20×60	60-95	107-172	120-145	2500	1600	3.57	74.3
LLA9	450	190	42	20-M20×70	80-125	132-212	145-180	5000	1250	6.47	111
LLA10	550	230	52	24-M24×80	100-150	167-252	180-220	10000	1000	17.55	191
LLA11	700	280	70	32-M30×90	130-180	202-302	220-270	20000	800	54.1	373

Note:
1. For 2 half coupling Shaft holes, Y,J,J₁ type shaft hole may be used as required,but Z,J type shaft hole shall not be used at both ends.

2. S dimension should take into consideration if Z₁ shaft hole is to be used.
 

♦Other Products List

Transmission Machinery  Parts Name	Model
Universal Coupling	WS,WSD,WSP
Cardan Shaft	SWC,SWP,SWZ
Tooth Coupling	CL,CLZ,GCLD,GIICL, GICL,NGCL,GGCL,GCLK
Disc Coupling	JMI,JMIJ,JMII,JMIIJ
High Flexible Coupling	LM
Chain Coupling	GL
Jaw Coupling	LT
Grid Coupling	JS

♦Our Company

HangZhou CHINAMFG Machinery Manufacturing Co., Ltd. is a high-tech enterprise specializing in the design and manufacture of various types of coupling. There are 86 employees in our company, including 2 senior engineers and no fewer than 20 mechanical design and manufacture, heat treatment, welding, and other professionals.

Advanced and reasonable process, complete detection means. Our company actively introduces foreign advanced technology and equipment, on the basis of the condition, we make full use of the advantage and do more research and innovation. Strict to high quality and operate strictly in accordance with the ISO9000 quality certification system standard mode.

Our company supplies different kinds of products. High quality and reasonable price. We stick to the principle of “quality first, service first, continuous improvement and innovation to meet the customers” for the management and “zero defect, zero complaints” as the quality objective. 

♦Our Services
1.Design Services
Our design team has experience in cardan shaft relating to product design and development. If you have any needs for your new product or wish to make further improvements, we are here to offer our support.

2.Product Services
Raw materials → Cutting → Forging →Rough machining →Shot blasting →Heat treatment →Testing →Fashioning →Cleaning→ Assembly→ Packing → Shipping

3.Samples Procedure
We could develop the sample according to your requirement and amend the sample constantly to meet your need.

4.Research & Development
We usually research the new needs of the market and develop the new model when there is new cars in the market.

5.Quality Control
Every step should be special test by Professional Staff according to the standard of ISO9001 and TS16949.

♦FAQ
Q 1: Are you trading company or manufacturer?
A: We are a professional manufacturer specializing in manufacturing various series of couplings.

Q 2: Can you do OEM?
Yes, we can. We can do OEM & ODM for all the customers with customized artworks of PDF or AI format.

Q 3: How long is your delivery time?
Generally it is 20-30 days if the goods are not in stock. It is according to quantity.

Q 4: Do you provide samples ? Is it free or extra ?
Yes, we could offer the sample but not for free. Actually we have a very good price principle, when you make the bulk order then cost of sample will be deducted.

Q 5: How long is your warranty?
A: Our Warranty is 12 months under normal circumstance.

Q 6: What is the MOQ?
A: Usually our MOQ is 1 pcs.

Q 7: Do you have inspection procedures for coupling ?
A: 100% self-inspection before packing.

Q 8: Can I have a visit to your factory before the order?
A: Sure,welcome to visit our factory.

Q 9: What’s your payment?
A: T/T. 

♦Contact Us Web: huadingcoupling
Add: No.11 HangZhou Road,Chengnan park,HangZhou City,ZheJiang Province,China /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

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Troubleshooting Common Issues with Tyre Couplings and Their Solutions

Tyre couplings, like any mechanical component, may encounter issues during their service life. Identifying and addressing these issues promptly is crucial to maintain the efficiency and reliability of the coupling and the connected machinery. Here are some common problems that may arise with tyre couplings and their potential solutions:

• 1. Misalignment: Misalignment between the shafts can lead to premature wear, increased vibration, and reduced coupling performance. Inspect the coupling for any signs of misalignment, such as abnormal wear on the tyre or coupling hubs. To solve this issue, realign the shafts within acceptable tolerances or consider using a tyre coupling with higher misalignment capability if necessary.
• 2. Excessive Vibration: Excessive vibration may indicate torsional vibration issues or misalignment. Check for any signs of damaged or worn components and ensure that the tyre coupling is adequately rated for the application’s speed and torque requirements. If vibration persists, consider using a tyre coupling with improved damping capabilities or consult with an engineer to identify the root cause.
• 3. Overheating: Overheating can be caused by excessive torque or overloading, inadequate ventilation, or operating beyond the temperature limits of the coupling. Verify that the coupling is appropriately sized for the application’s torque requirements and check for any obstructions hindering proper cooling. If the temperature exceeds the specified limits, consider using a high-temperature variant of the coupling or implementing cooling measures.
• 4. Abnormal Noise: Unusual noises, such as knocking or rattling, may indicate loose bolts, worn rubber elements, or misalignment. Inspect the coupling for loose connections and replace any damaged or worn parts. Additionally, verify the alignment and adjust if needed to eliminate the noise.
• 5. Cracks or Tears in the Tyre: Cracks or tears in the rubber tyre element can compromise the coupling’s flexibility and damping properties. Inspect the tyre regularly and replace it if any damage is detected. It is essential to use the correct replacement tyre recommended by the manufacturer.
• 6. Coupling Slippage: Slippage between the coupling and the shafts may occur due to inadequate tightening of the bolts or insufficient keying. Check the tightness of the bolts and ensure that they are torqued to the manufacturer’s specifications. If slippage persists, verify the keying or consider using a more secure keying method.

When troubleshooting tyre coupling issues, always refer to the manufacturer’s guidelines and technical documentation for specific solutions and recommendations. Regular inspections, preventive maintenance, and adherence to the manufacturer’s guidelines can help prevent and resolve problems, ensuring the smooth and efficient operation of tyre couplings and the connected machinery.

How do Tyre Couplings Compare to Grid and Gear Couplings in Terms of Performance?

Tyre couplings, grid couplings, and gear couplings are all popular types of flexible couplings used in industrial applications. Each type has its unique features and advantages, making them suitable for specific performance requirements. Let’s compare these couplings in terms of performance:

• Torsional Flexibility:
  • Tyre Couplings: Tyre couplings are known for their high torsional flexibility, allowing them to accommodate angular and axial misalignments. Their elastomeric tyre element provides excellent damping properties, reducing vibration and shock transmission.
  • Grid Couplings: Grid couplings offer moderate torsional flexibility, making them suitable for applications with lower misalignment requirements. They use a flexible grid element to transmit torque and accommodate misalignments.
  • Gear Couplings: Gear couplings provide low torsional flexibility and are better suited for applications with minimal misalignments. They use gear teeth to transmit torque between the coupling hubs.
• Misalignment Tolerance:
  • Tyre Couplings: Tyre couplings can handle both angular and axial misalignments simultaneously, offering a wide range of misalignment tolerance.
  • Grid Couplings: Grid couplings can accommodate limited angular misalignment but have less axial misalignment capacity compared to tyre couplings.
  • Gear Couplings: Gear couplings have limited misalignment tolerance and are best suited for applications with minimal misalignments.
• Shock Absorption:
  • Tyre Couplings: Tyre couplings excel in shock absorption, making them suitable for applications with frequent starts, stops, and load fluctuations.
  • Grid Couplings: Grid couplings offer moderate shock absorption capabilities, providing smoother power transmission in dynamic conditions.
  • Gear Couplings: Gear couplings have limited shock absorption capacity and may transmit more shock to the connected equipment.
• Temperature and Speed Limits:
  • Tyre Couplings: Tyre couplings typically have higher temperature and speed limits compared to grid and gear couplings.
  • Grid Couplings: Grid couplings have moderate temperature and speed limits suitable for many industrial applications.
  • Gear Couplings: Gear couplings are suitable for moderate temperature and speed ranges.
• Installation and Maintenance:
  • Tyre Couplings: Tyre couplings are relatively easy to install and require minimal maintenance, making them cost-effective options.
  • Grid Couplings: Grid couplings may require more frequent maintenance due to the grid element’s wear.
  • Gear Couplings: Gear couplings can be more complex to install and maintain compared to tyre and grid couplings.

In summary, tyre couplings are excellent choices for applications with significant misalignments, shock loads, and high-speed requirements. Grid couplings offer a balance between misalignment tolerance, shock absorption, and ease of maintenance. Gear couplings are suitable for applications with minimal misalignments and low-speed requirements.

The selection of the right coupling type depends on the specific application’s torque, speed, misalignment, and operational conditions. Understanding the performance characteristics of each coupling type helps in making an informed choice for optimal coupling performance and machinery reliability.

Comparison between Tyre Couplings and Other Types of Flexible Couplings

Flexible couplings are essential components in machinery and equipment that connect two shafts and allow for the transmission of torque while accommodating misalignment and damping vibrations. Several types of flexible couplings are available in the market, each with its advantages and applications. Let’s compare tyre couplings with some other common types of flexible couplings:

1. Tyre Couplings:

• Advantages:
• High misalignment tolerance, accommodating angular, parallel, and axial misalignments.
• Excellent vibration damping properties, reducing the transmission of vibrations to connected equipment.
• Good shock load absorption, protecting machinery from sudden impacts and overloads.
• Simple installation and maintenance.
• Cost-effective solution for various industrial applications.
• Applications:
• Motors, pumps, compressors, fans, conveyors, and material handling systems.
• Power transmission in industrial, construction, and marine applications.
• Mining equipment and steel mills.

2. Grid Couplings:

• Advantages:
• High torque capacity and torsional stiffness.
• Moderate misalignment tolerance.
• Good vibration dampening.
• Easy maintenance, as the grid can be replaced separately.
• Applications:
• Heavy machinery and industrial equipment.
• Pumps, compressors, and conveyors.
• Applications with moderate misalignment and high torque requirements.

3. Gear Couplings:

• Advantages:
• High torque capacity and torsional stiffness.
• Good misalignment tolerance, particularly angular misalignment.
• Robust and suitable for heavy-duty applications.
• High efficiency with little power loss.
• Applications:
• Steel mills, heavy machinery, and industrial equipment.
• Mining and mineral processing equipment.
• Applications with high torque requirements and moderate misalignment.

4. Oldham Couplings:

• Advantages:
• Zero-backlash design.
• High misalignment tolerance, particularly angular misalignment.
• Smooth and accurate power transmission.
• Relatively simple construction and installation.
• Applications:
• Precision machinery, automation systems, and robotics.
• Printing and textile machines.
• Applications with low to moderate torque requirements and angular misalignment.

Each type of flexible coupling has its own strengths and limitations, making it suitable for specific applications. The choice of coupling depends on factors such as torque requirements, misalignment conditions, the level of damping required, environmental conditions, and the specific machinery or equipment involved.

editor by CX 2024-03-26