Product Description

JMIJ Type With Intermediate Diaphragm Shaft Coupling (JMIJ)

JM series diaphragm flexible coupling is widely used in 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.

The main characteristics of JM Series Diaphragm Coupling:
1.Compensation 2 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 environment, and can be in shock, vibration, safety and dynamic conditions.

5.Simple structure, light weight, small size, convenient assembly and disassembly. Without moving the machine can be disassembled (with intermediate type), no need of 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 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.

JMIJ Type Diaphragm Coupling Main Dimension(JB/T9147-1999)

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

                
Production Pictures
 

♦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 shafts 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 new models when there are new cars in the market.

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

FAQ

Q 1: Are you a trading company or a 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 customers with customized PDF or AI format artwork.

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 an excellent price principle, when you make the bulk order the cost of the sample will be deducted.

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

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

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:1) 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:

1. Industrial Machinery:

In the industrial machinery sector, diaphragm couplings are utilized for:

• 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
2. Oil and Gas:

In the oil and gas industry, diaphragm couplings are commonly used in:

• Gas compressors and turbine drives
• Extraction pumps and mud pumps
• Rotating equipment on offshore platforms
• Power transmission in drilling rigs
3. Steel and Metal Processing:

Diaphragm couplings play a vital role in the steel and metal processing industry, where they are used in:

• Rolling mills and metal forming equipment
• Continuous casting machines
• High-temperature furnace drives
• Steel shears and cutters
4. Aerospace and Defense:

In the aerospace and defense sector, diaphragm couplings are utilized in:

• Aircraft engine power transmission
• Missile and satellite systems
• Airborne radar and avionics equipment
• Military vehicle drivetrains
5. Marine:

In the marine industry, diaphragm couplings are commonly found in:

• Marine propulsion systems
• Shipboard pumps and compressors
• Power transmission in marine generators
• Steering systems for marine vessels
6. Chemical and Process Industries:

In the chemical and process industries, diaphragm couplings are used in:

• Chemical processing pumps and compressors
• Agitators and mixers
• Reaction vessels and reactors
• Chemical plant material handling systems

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.

Design Considerations for Selecting a Diaphragm Coupling for a Specific Application

When choosing a diaphragm coupling for a particular application, several crucial design considerations should be taken into account. Each application has unique requirements, and selecting the right diaphragm coupling can significantly impact the overall performance and reliability of the system. Here are the key design considerations:

• 1. Torque Capacity:

Determine the maximum torque that the diaphragm coupling will need to transmit in the application. Select a diaphragm coupling with a torque capacity that comfortably exceeds the application’s peak torque requirements. Consider potential torque variations during operation and choose a coupling that can handle the dynamic torque conditions, especially in machines with frequent start-stop cycles or load fluctuations.

• 2. Misalignment Tolerance:

Assess the potential misalignment between the connected shafts in the application. Diaphragm couplings are known for their ability to compensate for various types of misalignment, such as axial, angular, and parallel misalignment. Determine the expected misalignment angles and choose a diaphragm coupling with the appropriate misalignment capabilities to ensure smooth operation and minimize stress on the coupling and connected machinery.

• 3. Speed and RPM:

Consider the rotational speed and RPM (revolutions per minute) requirements of the application. Diaphragm couplings are suitable for high-speed applications due to their balanced design and ability to dampen vibrations. Ensure that the selected coupling can handle the required RPM without encountering critical speed issues or exceeding its rated limitations.

• 4. Operating Environment:

Evaluate the environmental conditions in which the diaphragm coupling will operate. Consider factors such as temperature, humidity, presence of corrosive substances, and exposure to contaminants. Choose a diaphragm coupling made from materials suitable for the specific operating environment to prevent corrosion and premature wear.

• 5. Space Constraints:

Diaphragm couplings have a compact design, making them suitable for applications with limited space. Consider the available installation space and choose a coupling that fits within the available dimensions while providing the required torque capacity and misalignment compensation.

• 6. Maintenance Requirements:

Assess the maintenance requirements of the diaphragm coupling. Some couplings may require periodic lubrication, while others are maintenance-free. Choose a coupling with maintenance requirements that align with the resources and capabilities of the maintenance team.

• 7. Application-specific Factors:

Consider any unique factors relevant to the application, such as the presence of shock loads, dynamic balancing requirements, or the need for precision in high-accuracy systems. These specific factors can influence the selection of the most suitable diaphragm coupling for the application.

By carefully considering these design factors, engineers and designers can select the most appropriate diaphragm coupling for a specific application. The right coupling choice will enhance the overall performance, reliability, and service life of the machinery or equipment in which it is employed.

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:

1. 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.
2. 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 2024-04-29