Product Description
JMIJ Diaphragm Coupling with Counterbore Intermediate Shaft(JB/T9147-1999)
♦Description
JM series diaphragm flexible coupling is widely used in the machinery and equipment industry, metallurgy, mines, petroleum, chemical, electric power, shipbuilding, lifting transport, textile, light industry, agricultural machinery, printing machinery and water pump, fan, etc. in the transmission of power machine.
♦Main Characteristics
1. Compensation two-axis misalignment of the ability, and tooth type coupling can be much more than a double angle displacement, radial displacement of the small, flexible, allowing a certain axial, radial, and angular displacement.
2. Obvious damping effect, no noise, no wear, and tear.
3. High transmission efficiency, up to 99.86%. Especially suitable for medium and high-speed high-power transmission.
4. Adapt to high temperature (-80+300) and harsh environments, and can be in shock, vibration, safety, and dynamic conditions.
5. Simple structure, lightweight, small size, convenient assembly, and disassembly. Without moving the machine can be disassembled (with intermediate type), with no need for lubrication.
6. Accurately convey the rotational speed, the operation has not turned bad, can be used for the transmission of precision machinery.
JM series diaphragm flexible coupling is widely used in the machinery and equipment industry, metallurgy, mines, petroleum, chemical, electric power, shipbuilding, lifting transport, textile, light industry, agricultural machinery, printing machinery, and water pump, fan, etc. in the transmission of power machine.
♦Basic Parameter and Main Dimension(JB/T3241-1991)
| Type | Norminal torque Tn |
Peak torque Tmax |
Max Speed np |
Bore diameter d |
Bore Length | D | t | L2 min |
Mass | Rotary inertia | |||
| Y type | J,J1,Z,Z1 type | L (recommend) |
|||||||||||
| L | L | L1 | |||||||||||
| N·m | N·m | r·min-1 | mm | kg | kg·m2 | ||||||||
| JMIJ1 | 25 | 80 | 6000 | 14 | 32 | – | J127 Z120 |
35 | 90 | 8.8 | 100 | 1.8 | 0.0013 |
| 16,18,19 | 42 | 30 | |||||||||||
| 20,22 | 52 | 38 | |||||||||||
| JMIJ2 | 63 | 180 | 5000 | 18,19 | 42 | 30 | 45 | 100 | 9.5 | 2.4 | 0.002 | ||
| 20,22,24 | 52 | 38 | |||||||||||
| 25 | 62 | 44 | |||||||||||
| JMIJ3 | 100 | 315 | 5000 | 20,22,24 | 52 | – | 38 | 50 | 120 | 11 | 120 | 4.1 | 0.0047 |
| 25,28 | 62 | 44 | |||||||||||
| 30 | 82 | 60 | |||||||||||
| JMIJ4 | 160 | 500 | 4500 | 24 | 52 | 38 | 55 | 130 | 12.5 | 5.4 | 0.0069 | ||
| 25,28 | 62 | 44 | |||||||||||
| 30,32,35 | 82 | 60 | |||||||||||
| JMIJ5 | 250 | 710 | 4000 | 28 | 62 | 44 | 60 | 150 | 14 | 140 | 8.8 | 0.5711 | |
| 30,32,35,38 | 82 | 60 | |||||||||||
| 40 | 112 | 84 | |||||||||||
| JMIJ6 | 400 | 1120 | 3600 | 32,35,38 | 82 | 82 | 60 | 65 | 170 | 15.5 | 13.4 | 0.5711 | |
| 40,42,45,48, 50 |
112 | 112 | 84 | ||||||||||
| JMIJ7 | 630 | 1800 | 3000 | 40,42,45,48, 50,55,56 |
112 | 112 | 84 | 70 | 210 | 19 | 150 | 22.3 | 0..76 |
| 60 | 142 | – | 107 | ||||||||||
| JMIJ8 | 1000 | 2500 | 2800 | 45,48,50,55, 56 |
112 | 112 | 84 | 80 | 240 | 22.5 | 180 | 36 | 0.1602 |
| 60,63,65,70 | 142 | 107 | |||||||||||
| JMIJ9 | 1600 | 4000 | 2500 | 55,56 | 112 | 84 | 85 | 260 | 24 | 220 | 48 | 0.2509 | |
| 60,63,70,71, 75 |
142 | 107 | |||||||||||
| 80 | 172 | 132 | |||||||||||
| JMIJ10 | 2500 | 6300 | 2000 | 63,65,70,71,75 | 142 | 142 | 107 | 90 | 280 | 17 | 250 | 85 | 0.5159 |
| 80,85,90,95 | 172 | – | 132 | ||||||||||
| JMIJ11 | 4000 | 9000 | 1800 | 75 | 142 | 142 | 107 | 95 | 300 | 19.5 | 290 | 112 | 0.8223 |
| 80,85,90,95 | 172 | 172 | 132 | ||||||||||
| 100,110 | 212 | – | 167 | ||||||||||
| JMIJ12 | 6300 | 12500 | 1600 | 90,95 | 172 | 132 | 120 | 340 | 23 | 300 | 152 | 1.4109 | |
| 100,110,120,125 | 212 | 167 | |||||||||||
♦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
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Industries and Use Cases for Diaphragm Couplings
Diaphragm couplings find applications in various industries due to their flexibility, precision, and ability to handle misalignment. Here are some common industries that commonly use diaphragm couplings and their specific use cases:
- Industrial Machinery:
- Power transmission in pumps and compressors
- Motion control systems in robotics and automation
- Drive systems for conveyors and material handling equipment
- Motion control applications in packaging and printing machinery
- Oil and Gas:
- Gas compressors and turbine drives
- Extraction pumps and mud pumps
- Rotating equipment on offshore platforms
- Power transmission in drilling rigs
- Steel and Metal Processing:
- Rolling mills and metal forming equipment
- Continuous casting machines
- High-temperature furnace drives
- Steel shears and cutters
- Aerospace and Defense:
- Aircraft engine power transmission
- Missile and satellite systems
- Airborne radar and avionics equipment
- Military vehicle drivetrains
- Marine:
- Marine propulsion systems
- Shipboard pumps and compressors
- Power transmission in marine generators
- Steering systems for marine vessels
- Chemical and Process Industries:
- Chemical processing pumps and compressors
- Agitators and mixers
- Reaction vessels and reactors
- Chemical plant material handling systems
In the industrial machinery sector, diaphragm couplings are utilized for:
In the oil and gas industry, diaphragm couplings are commonly used in:
Diaphragm couplings play a vital role in the steel and metal processing industry, where they are used in:
In the aerospace and defense sector, diaphragm couplings are utilized in:
In the marine industry, diaphragm couplings are commonly found in:
In the chemical and process industries, diaphragm couplings are used in:
These examples represent just a few of the many industries where diaphragm couplings are utilized. Their ability to handle misalignment, dampen vibrations, and transmit torque reliably makes them an integral part of various mechanical systems in different sectors.
Can Diaphragm Couplings Reduce Noise and Dampen Vibrations in Mechanical Systems?
Yes, diaphragm couplings can help reduce noise and dampen vibrations in mechanical systems. The design and material properties of diaphragm couplings contribute to their ability to minimize vibrations and noise during operation. Here’s how diaphragm couplings achieve this:
- Vibration Dampening:
- Misalignment Compensation:
- Reduced Mechanical Resonance:
- Smooth Torque Transmission:
- Compact Design:
Diaphragm couplings are designed to be flexible and allow a controlled amount of movement between the connected shafts. This flexibility helps dampen vibrations generated during the operation of rotating machinery. When vibrations occur due to load changes or misalignments, the diaphragm absorbs and dissipates these vibrations, preventing them from propagating through the system. As a result, diaphragm couplings can contribute to a smoother and quieter operation of mechanical systems.
As mentioned earlier, diaphragm couplings can accommodate axial, angular, and parallel misalignments between the connected shafts. Misalignment in rotating machinery can lead to increased vibrations and noise. By effectively compensating for misalignment, diaphragm couplings help maintain proper shaft alignment, reducing the risk of vibration-related issues and associated noise.
Mechanical resonance occurs when the natural frequency of a system matches the excitation frequency. It can lead to amplified vibrations and noise. Diaphragm couplings, with their ability to dampen vibrations, can help reduce the occurrence of mechanical resonance in rotating systems. By preventing the build-up of excessive vibrations, diaphragm couplings minimize the likelihood of resonance-related problems.
Diaphragm couplings provide smooth torque transmission between the shafts, resulting in a more uniform and stable power transfer. When torque is transmitted smoothly, there is less likelihood of sudden torque fluctuations that can cause vibrations and noise. The controlled flexibility of the diaphragm ensures that torque is transmitted efficiently, without introducing undesirable harmonics or disturbances in the system.
Diaphragm couplings have a compact and lightweight design compared to some other coupling types, such as gear couplings. This reduced mass and size help minimize inertial forces during operation, leading to lower levels of vibration and noise.
Overall, diaphragm couplings are effective in reducing noise and dampening vibrations in mechanical systems, making them suitable for applications where noise reduction and smooth operation are essential. Their ability to handle misalignments, dampen vibrations, and transmit torque accurately contributes to improved performance and reliability in various industrial settings.
How Do Diaphragm Couplings Handle Misalignment Between Shafts and Reduce Vibrations?
Diaphragm couplings are designed to handle misalignment between shafts and reduce vibrations effectively. Here’s how they achieve these functionalities:
- Misalignment Handling: Diaphragm couplings can accommodate three types of misalignment: angular, parallel, and axial misalignment.
- Angular Misalignment: When the shafts are not perfectly aligned and have angular offset, the flexible diaphragm in the coupling can flex and bend, allowing for relative movement between the shafts without transmitting excessive torque loads or inducing stress on the machinery.
- Parallel Misalignment: In cases where the shafts have parallel misalignment (i.e., horizontal offset), the diaphragm can also flex and move laterally to accommodate the misalignment while maintaining a continuous connection between the two hubs.
- Axial Misalignment: Diaphragm couplings can also handle axial misalignment (i.e., axial displacement), as the flexible diaphragm can compress or elongate slightly to adjust for the axial movement of the shafts.
- Vibration Reduction: Diaphragm couplings are known for their ability to dampen vibrations, which helps in reducing vibration levels in the connected machinery and the overall mechanical system.
- Flexible Diaphragm: The key component that enables vibration reduction is the flexible diaphragm. As the diaphragm flexes in response to misalignment or torque loads, it absorbs and dissipates vibrations, preventing them from being transmitted through the coupling and into the system.
- Natural Frequency: The design of the diaphragm is tuned to have a specific natural frequency, which allows it to effectively dampen and attenuate vibrations within the desired range.
- Material Selection: The choice of material for the diaphragm is crucial in determining its vibration damping capabilities. Certain materials have better vibration-absorbing properties, making them ideal for use in diaphragm couplings.
In summary, diaphragm couplings handle misalignment between shafts by using the flexible diaphragm to accommodate angular, parallel, and axial misalignment. Additionally, they reduce vibrations by utilizing the same flexible diaphragm to dampen and absorb vibrations, enhancing the smooth operation and longevity of the connected machinery and mechanical systems.
editor by CX 2024-03-18