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 | Nominal 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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Materials Used to Manufacture Diaphragm Couplings and Their Impact on Performance
Diaphragm couplings are manufactured using various materials, and the choice of material significantly impacts their performance in different applications. Here are some common materials used in diaphragm couplings and their impact on performance:
- Metallic Alloys:
- High-Temperature Alloys:
- Titanium:
- Elastomers:
- Non-Metallic Materials:
Stainless steel and other high-strength metallic alloys are widely used in diaphragm couplings. These materials offer excellent durability, high torsional stiffness, and resistance to wear and fatigue. They are well-suited for high-torque applications and environments with demanding operating conditions.
In applications where diaphragm couplings are exposed to elevated temperatures, specialized high-temperature alloys like Inconel and Hastelloy are used. These alloys can withstand extreme heat without losing their mechanical properties, making them ideal for use in industries such as steel processing and power generation.
Titanium is favored for its lightweight and excellent corrosion resistance. Diaphragm couplings made from titanium are commonly used in aerospace and marine applications where weight reduction and resistance to corrosive environments are critical.
For certain applications that require vibration dampening and shock absorption, diaphragm couplings can be manufactured with elastomeric materials like rubber or urethane. These materials help reduce transmitted vibrations and can be found in pumps, compressors, and automotive drivetrain systems.
In situations where electrical isolation or non-magnetic properties are necessary, non-metallic materials like PTFE (Teflon) or polypropylene may be used. These materials are also highly resistant to chemical corrosion, making them suitable for certain chemical processing and semiconductor applications.
The choice of material impacts several aspects of diaphragm coupling performance, including:
- Torsional Stiffness: Metallic alloys and high-temperature materials provide high torsional stiffness, ensuring efficient torque transmission and accuracy in motion control applications.
- Corrosion Resistance: The selection of corrosion-resistant materials is crucial in applications where diaphragm couplings are exposed to corrosive environments, such as in marine or chemical industries.
- Temperature Resistance: High-temperature alloys enable diaphragm couplings to operate effectively in environments with elevated temperatures, such as steel processing or power generation plants.
- Weight: Materials like titanium offer lightweight advantages, making diaphragm couplings suitable for aerospace and other weight-sensitive applications.
- Vibration Damping: Elastomeric materials provide excellent vibration dampening properties, reducing vibrations and noise in certain applications.
Manufacturers carefully select the appropriate material based on the specific requirements of the application to ensure optimal performance and reliability of the diaphragm coupling in a wide range of industries.
Real-World Case Studies of Diaphragm Couplings in Engineering Projects
Diaphragm couplings have been successfully utilized in various engineering projects, providing reliable power transmission and addressing specific challenges faced by different industries. Here are some real-world case studies and success stories showcasing the effectiveness of diaphragm couplings:
- Case Study 1: Pumping System in Wastewater Treatment Plant
- Case Study 2: Turbine-Generator Coupling in Power Plant
- Case Study 3: Industrial Compressor System
In a wastewater treatment plant, a critical pumping system was experiencing frequent breakdowns due to misalignment issues and vibration-related failures. The plant engineers decided to replace the existing gear couplings with diaphragm couplings to address these problems. The diaphragm couplings’ flexibility allowed them to compensate for the misalignment caused by thermal expansion and pump impeller wear. Additionally, the couplings’ ability to dampen vibrations reduced stress on the pump bearings, resulting in extended maintenance intervals and increased overall system reliability. The successful implementation of diaphragm couplings in this project led to significant cost savings by minimizing downtime and reducing the need for frequent maintenance.
In a power generation plant, a large gas turbine-generator coupling required replacement due to excessive wear and fatigue-related failures in the previous coupling. The plant engineers opted for a high-performance diaphragm coupling with improved fatigue resistance and higher torque capacity. The flexibility of the diaphragm coupling allowed it to accommodate slight misalignments between the turbine and the generator during operation. This capability reduced the stress on the coupling and mitigated the risk of premature failure. The diaphragm coupling’s ability to handle torsional vibrations and dampen mechanical resonance further improved the overall reliability and performance of the turbine-generator system, resulting in increased power generation efficiency and reduced maintenance costs.
In an industrial compressor application, the existing coupling experienced frequent failures due to misalignment and shock loads from varying compression demands. The plant engineers replaced the old coupling with a diaphragm coupling featuring high misalignment tolerance and excellent shock absorption properties. The diaphragm coupling’s flexibility effectively compensated for the misalignment between the compressor and the motor, resulting in smoother operation and reduced stress on the drive components. Additionally, the coupling’s ability to absorb sudden shock loads reduced the risk of equipment damage and minimized unplanned downtime. The successful implementation of the diaphragm coupling significantly improved the compressor system’s reliability and contributed to increased productivity in the industrial facility.
These case studies demonstrate the successful application of diaphragm couplings in diverse engineering projects, including wastewater treatment plants, power generation facilities, and industrial compressors. The flexibility, misalignment compensation, and vibration dampening properties of diaphragm couplings have proven to be valuable in addressing specific challenges and enhancing the performance and reliability of critical machinery in various industries.
Are There Any Industry Standards or Certifications for Diaphragm Couplings?
Yes, there are industry standards and certifications that apply to diaphragm couplings, ensuring their quality, performance, and safety. Some of the notable standards and certifications include:
- American Petroleum Institute (API) Standards: API provides standards for various equipment and components used in the oil and gas industry. For diaphragm couplings used in oil and gas applications, compliance with API standards ensures that the couplings meet specific requirements and are suitable for use in demanding environments.
- American Gear Manufacturers Association (AGMA) Standards: AGMA sets standards for various types of couplings, including diaphragm couplings. These standards cover design considerations, materials, performance, and safety factors, ensuring that couplings adhere to industry best practices.
- International Organization for Standardization (ISO) Standards: ISO has several standards relevant to couplings in general, which can also apply to diaphragm couplings. ISO standards ensure global consistency in terms of design, manufacturing, and performance criteria.
- European Conformity (CE) Marking: Diaphragm couplings intended for sale within the European Economic Area (EEA) must bear the CE marking, indicating that they comply with relevant European Union (EU) directives, including safety and environmental requirements.
- American National Standards Institute (ANSI) Standards: ANSI sets standards for various industrial equipment, including couplings. ANSI standards provide guidelines for design, materials, and performance, ensuring safe and reliable operation.
- Occupational Safety and Health Administration (OSHA) Compliance: Although not a specific certification for diaphragm couplings, compliance with OSHA regulations is essential to ensure the safety of workers who operate and maintain equipment with diaphragm couplings.
Manufacturers of diaphragm couplings often seek these certifications and comply with relevant industry standards to demonstrate the quality and reliability of their products. Customers and end-users can look for these certifications and standards compliance when selecting diaphragm couplings for their applications, as it provides assurance of the coupling’s performance and adherence to safety requirements.
editor by CX 2024-02-12