WHY CHOOSE US
1.More than 10 years experience in excavator spare parts field;
2.We are experts in CHINAMFG excavator parts and have in this industry since 2571
3.Original parts from suppliers with ensured and high quality;
4.Large range of spare parts scope for excavators;
5.Have parts in stock and give you short lead time;
6.Reasonable and competitive price;
HangZhou Junchi construction machinery Co., Ltd. is located in HangZhou logistics capital of China. We are a dealer specialized in excavator accessories, excavator parts genuine accessories one-stop shopping center. We provide all types of Volvo/LG/PC excavator spare parts for all kinds of excavator models.
It is convenient for you to buy all parts for Volvo/LG/PC excavators together.
JUNCHI is our own brand, which integrates our industry experience over the years to provide you with products with better prices and higher quality. We are committed to meeting all your needs for excavator parts and providing you with the most perfect excavator parts solution. Use the best quality and the most competitive price to obtain long-term cooperation with customers.
We sincerely hope to cooperate with all people around the world and welcome your visit to our company, In the meanwhile, we believe that through our continuous perfecting service system and technique, you can possess the world’s best products with the world’s first – class service!
Packing and shipment
1 We have many highly qualified engineers and sale managers, with wide and specific knowledge in the sale, and repair of construction machines, the sales team prides itself on its knowledge of heavy machinery coupled with exemplary after sales service .
2 We have our transfer warehouse for all the spare parts, the warehouse is about 2000 square meter, hold about USD5,000,000.00 spare parts anytime.
3 we have high-efficient logistics operation system,which ensure shipment is on time and right.
4 our product is all over the world.
5 we hope create the future together with every Volvo/LG/PC machine customers.
1.If I only know the excavator model, but can not offer parts No., what should I do ?
If possible, you can provide pictures of old products, nameplate or size of the parts.
2.How can I pay the order?
We can receive payment through T/T, L/C, Western Union.
3.When will get the items after I place order?
Once we receive your payment, we will deliver the goods within 24 hours; if not in stock , we will communicate with you before placing orders.
4.How can I do if there is something wrong with the items?
First of all ,we can assure the quality of our products ,if you really found something wrong ,pls provide pictures for us and we will check. After it is confirmed, pls return to us , we will offer the correct item.
5.What is your main products ?
We are specialized in excavator spare parts, such as engines/or parts, undercarriage parts, electronic parts, hydraulic parts , covering parts, attachments and so on. If you need other excavator parts, we also can supply as your requirements
How does a flexible coupling handle electrical insulation between shafts?
Flexible couplings are typically not designed to provide electrical insulation between shafts. In most cases, flexible couplings are used solely for the purpose of transmitting mechanical power from one shaft to another while accommodating misalignment and absorbing shocks and vibrations. They do not offer any electrical isolation or insulation properties.
When electrical insulation is required between two rotating shafts in a system, additional components or specialized couplings are used. For applications where electrical isolation is necessary, insulated couplings or special insulation components can be employed. These types of couplings feature insulating materials, coatings, or designs that prevent electrical current from flowing between the connected shafts.
Insulated couplings can be beneficial in certain applications, such as electric motor drives or systems involving sensitive electronics. They help prevent stray currents, ground loops, and electrical interference that could potentially damage equipment or affect the accuracy of electronic signals. However, it is important to note that not all flexible couplings provide this electrical insulation capability, and users should carefully select couplings that meet the specific electrical isolation requirements of their application.
Summary: Flexible couplings, as standard mechanical components, do not inherently provide electrical insulation between shafts. They are primarily used for mechanical power transmission and misalignment compensation. If electrical insulation is needed between rotating shafts, insulated couplings or specialized components with insulating properties should be chosen to meet the specific requirements of the application.
How does a flexible coupling contribute to reducing maintenance and downtime costs?
A flexible coupling plays a significant role in reducing maintenance and downtime costs in mechanical systems. Here are the ways in which it achieves this:
- Misalignment Compensation: Flexible couplings can accommodate both angular and parallel misalignments between shafts. By absorbing and compensating for misalignment, they reduce wear and stress on connected equipment, minimizing the risk of premature failures and the need for frequent adjustments.
- Vibration Damping: Flexible couplings dampen vibrations and shock loads in the system. This not only protects the connected components from excessive wear but also reduces the likelihood of damage to bearings, seals, and other critical parts, which would otherwise require frequent replacement or repair.
- Protection Against Shock Loads: In applications where sudden starts, stops, or load fluctuations occur, flexible couplings can absorb and dissipate some of the shock loads, preventing potential damage to machinery. This feature extends the equipment’s lifespan and minimizes unplanned downtime.
- Longevity of Components: By reducing stress and wear on connected components, flexible couplings contribute to their longevity. Components such as bearings, shafts, and gears are subject to less strain and fatigue, resulting in extended service intervals and reduced replacement costs.
- Easy Installation and Maintenance: Flexible couplings are relatively easy to install and require minimal maintenance. Routine inspections to check for wear or damage can be done without significant downtime, allowing proactive maintenance to address any issues before they escalate.
- Adaptability to Operating Conditions: Flexible couplings can handle variations in operating conditions, such as temperature fluctuations and different types of loads. Their ability to accommodate changing conditions reduces the need for frequent adjustments or component replacements due to environmental factors.
- Reduced Downtime during Maintenance: In the event of maintenance or equipment repairs, flexible couplings can be quickly disconnected and reconnected, minimizing the downtime required for servicing. This quick replacement reduces production losses and improves overall system efficiency.
Overall, the use of flexible couplings in mechanical systems promotes reliability, extends the life of equipment, and helps prevent costly breakdowns. By reducing maintenance and downtime costs, flexible couplings contribute to improved productivity and profitability for industrial operations.
Can you explain the different types of flexible coupling designs available?
There are several types of flexible coupling designs available, each with its unique construction and characteristics. These designs are tailored to meet specific application requirements and address different types of misalignment and torque transmission needs. Here are some of the most common types of flexible couplings:
- Jaw Couplings: Jaw couplings consist of two hubs with curved jaws and an elastomer spider placed between them. The spider acts as a flexible element and can compensate for angular and parallel misalignment. Jaw couplings are widely used in various industrial applications due to their simple design and effectiveness in handling misalignment and vibration damping.
- Disc Couplings: Disc couplings use thin metallic discs with a series of alternating slits and flanges to connect the shafts. The disc coupling design allows for excellent misalignment compensation, including angular, parallel, and axial misalignment. Disc couplings are known for their high torsional stiffness and precise torque transmission capabilities.
- Gear Couplings: Gear couplings consist of toothed hubs connected by an external sleeve with gear teeth. They are well-suited for applications with high torque and moderate misalignment. Gear couplings offer good misalignment compensation and high torque capacity, making them popular in heavy-duty industrial applications.
- Beam Couplings: Beam couplings use a single piece of flexible material, often a metal beam, to connect the shafts. The material’s flexibility allows for angular and axial misalignment compensation. Beam couplings are compact, lightweight, and provide low inertia, making them suitable for applications with high-speed requirements.
- Bellows Couplings: Bellows couplings consist of a bellows-like flexible structure that connects the two hubs. They can compensate for angular, parallel, and axial misalignment. Bellows couplings are known for their high torsional stiffness and ability to maintain constant velocity transmission.
- Oldham Couplings: Oldham couplings use three discs, with the middle one having a perpendicular slot. This design allows for angular misalignment compensation while transmitting torque between the hubs. Oldham couplings are often used when electrical isolation between shafts is required.
Each flexible coupling design has its strengths and limitations, and the choice depends on factors such as the application’s torque requirements, misalignment conditions, operating environment, and speed. Proper selection of the coupling type ensures optimal performance, efficiency, and reliability in various mechanical systems and rotating machinery.
editor by CX 2023-10-07