Grossiste en Chine Poulie tandem double cardioïde extérieure 30kn pour l'escalade de haute qualité

Description du produit

Outdoor 30KN Cardioid Double Pulley Tandem Pulley  For Climbing
 

Description du produit

Photos détaillées

Paramètres du produit

Application

Profil de l'entreprise

HangZhou Muyu Aloft Work Tech. Co, LTD. is committed to safety protection for adventurers and workers at height. Our products include harness, retractable lifeline, forged carabiners and hooks which are designed to ensure safety while exploring or working at height. Additionally, we offer good quality and affordable gear to climbers, we also supply OEM/ODM services. we dedicate our knowledge and share our innovation to provide solutions for our customers. We not just on the gear we sell but also advice on products, climbing, canyoning, mountaineering, caving and more.  

Our Advantage:

To provide the most advanced technology
To provide the quality products
To provide on-time delivery
To provide the most comprehensive service

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Packaging & Shipping

FAQ

Q1. How can I get the quotation?
Please contact us via Trade Manager or Email and send us your drawings, quantity, material of the products or other detail requirements. Then our engineering team will work on them and submit competitive quotation to you.

Q2. Can you make parts based on samples? 
Yes,we can make measurement based on your samples to make drawings for machining parts making.

Q3: Can you make my designs?
Yes, OEM/ODM is welcome, pls feel free to send us pictures. If necessary, we can keep your design be protected under law.

Q4. Does samples available before order?
Yes, it usually will take 3-10days for machined parts but longer for casting parts.
We can provide some parts for free sample. However, you have to pay the cost of courier by express like: DHL, TNT, UPS and FEDEX.

Q5. What's your delivery time?
Usually 20-35 days after receiving deposit and special for the first order of casting parts.

Q6. How to ensure the quality of parts?
Our team will inspect all incoming material.A pre-production sample always made before mass production and final Inspection will be done by our QC team before shipment;

Q7.What is your payment terms?
Regularly Payment=1000USD, 30% T/T in advance, 70% balance to be paid by T/T before delivery.

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Can you explain the concept of “efficiency” in pulley systems?

In pulley systems, efficiency refers to the ratio of output work or power to the input work or power, taking into account any losses or inefficiencies in the system. It represents how effectively the pulley system converts the input energy into useful output energy.

The efficiency of a pulley system can be affected by various factors, including friction, mechanical losses, and the design and condition of the pulleys and ropes. Here are some key points to understand about efficiency in pulley systems:

1. Mechanical Advantage and Efficiency: Pulley systems can provide a mechanical advantage by reducing the effort force required to lift a load. However, it's important to note that while a higher mechanical advantage generally means less effort is needed, it may also result in lower efficiency. This is because as the mechanical advantage increases, the system may experience higher frictional losses and other inefficiencies.

2. Friction and Efficiency: Friction plays a significant role in the efficiency of pulley systems. The interaction between the pulley wheels and the ropes or belts can result in frictional losses, which reduce the overall efficiency of the system. Friction can be minimized by using pulleys with low-friction bearings or by lubricating the contact surfaces.

3. Rope or Belt Material: The choice of rope or belt material can impact the efficiency of a pulley system. Different materials have varying coefficients of friction, flexibility, and durability, which can affect the overall efficiency. For example, using a rope or belt with low friction and high strength can help reduce energy losses and improve efficiency.

4. Pulley Design and Condition: The design and condition of the pulleys also influence efficiency. Pulleys should be properly aligned, have smooth surfaces, and be free from damage or wear. Misaligned or worn pulleys can increase friction and decrease efficiency.

5. System Load: The efficiency of a pulley system can vary based on the magnitude of the load being lifted or moved. Higher loads can result in increased friction and mechanical losses, leading to lower efficiency.

Efficiency is typically expressed as a percentage, with 100% representing a perfectly efficient system where all the input energy is converted into useful output energy. In real-world pulley systems, efficiency is often less than 100% due to various factors, including friction, heat generation, and other losses.

It's important to consider efficiency when designing or evaluating pulley systems. Higher efficiency means a more effective use of input energy, reduced energy waste, and improved overall performance.

Comment les poulies contribuent-elles au fonctionnement des vélos et des motos ?

Les poulies jouent un rôle important dans le fonctionnement des vélos et des motos, en contribuant à la transmission de puissance, au contrôle de la vitesse et à l'efficacité mécanique globale. Voici comment les poulies contribuent au fonctionnement de ces véhicules :

1. Vélos :

– Derailleur System: In most modern bicycles, pulleys are used in the derailleur system. The derailleur is responsible for shifting the bicycle chain between different gears on the front and rear sprockets. Pulleys, often referred to as jockey wheels, are positioned in the derailleur to guide and tension the chain as it moves between gears. They ensure smooth and precise shifting, allowing the rider to adapt to various terrains and maintain an optimal pedaling cadence.

– Belt Drive Systems: Some bicycles use a belt drive instead of a traditional chain drive. Belt drives employ a pulley system that consists of a front pulley attached to the pedal crank and a rear pulley attached to the rear wheel hub. The belt is wrapped around these pulleys, transferring power from the rider's pedaling motion to propel the bicycle forward. Pulleys in belt drive systems enable efficient power transfer, reduce maintenance needs, and provide a quieter and cleaner alternative to chain drives.

2. Motos :

– Clutch System: Pulleys, known as clutch pulleys, are utilized in motorcycle clutch systems. The clutch connects the engine to the transmission and allows the rider to engage or disengage power transmission to the rear wheel. When the clutch lever is pulled, the clutch pulley separates the engine's rotational motion from the transmission, disengaging power transfer. Releasing the clutch lever brings the pulley back into contact, engaging power transmission and enabling the motorcycle to move.

– Variable Transmission Systems: Some motorcycles employ pulleys in variable transmission systems, such as continuously variable transmissions (CVT). CVTs use a pair of pulleys connected by a belt or chain. By changing the diameter of the pulleys, the CVT adjusts the gear ratio continuously, providing seamless and efficient power delivery across a wide range of speeds. Pulleys in variable transmission systems contribute to smooth acceleration, improved fuel efficiency, and enhanced riding comfort.

– Drive Belt Systems: Pulleys are also utilized in motorcycles equipped with belt drive systems. Similar to bicycles, these systems consist of a front pulley connected to the engine's crankshaft and a rear pulley connected to the rear wheel. The belt runs around these pulleys, transferring power from the engine to the rear wheel. Belt drive systems offer advantages such as reduced maintenance, quieter operation, and smoother power delivery compared to traditional chain drives.

Dans l'ensemble, les poulies sont des composants essentiels des vélos et des motos, contribuant à un changement de vitesse en douceur, à une transmission de puissance efficace et à une amélioration des performances globales. Qu'il s'agisse de systèmes de dérailleur, de systèmes de transmission par courroie, de systèmes d'embrayage ou de systèmes de transmission variable, les poulies jouent un rôle essentiel dans l'amélioration de la fonctionnalité et de l'expérience de conduite de ces véhicules.

Can you explain the basic principles of pulley mechanics?

Pulley mechanics are based on a few fundamental principles that govern the operation of pulley systems. Here's an explanation of the basic principles:

1. Mechanical Advantage: The primary principle of pulley mechanics is mechanical advantage. A pulley system allows for the multiplication of force applied to the rope or belt. By distributing the force over multiple segments of the rope or belt, the load becomes easier to lift or move. The mechanical advantage gained depends on the number of pulleys used in the system. The more pulleys in the system, the greater the mechanical advantage.

2. Force Transmission: When a force is applied to one end of the rope or belt, it creates tension that causes the pulley to rotate. As the pulley turns, the force is transmitted to the load attached to the other end of the rope or belt. This force transmission allows for the movement and manipulation of objects in pulley systems.

3. Directional Change: One of the key principles of pulley mechanics is directional change. A pulley system enables the operator to change the direction of the applied force. By redirecting the force along a different path, a pulley system allows for force to be exerted from a more convenient or advantageous position. This directional change is particularly useful in situations where the force needs to be applied vertically, horizontally, or at an angle.

4. Conservation of Energy: Pulley mechanics also adhere to the principle of conservation of energy. The work done on the load by the applied force is equal to the work done against the load's weight. Through the pulley system, the input force is transformed into an output force that moves or lifts the load. The energy input and output remain the same, but the pulley system allows for the distribution and transformation of forces to achieve the desired mechanical advantage.

5. Speed and Torque Conversion: Pulleys can also be used to convert speed and torque in mechanical systems. By varying the size of the pulleys or using pulleys of different diameters, the rotational speed and torque can be adjusted according to the requirements of the system. This speed and torque conversion allows for the optimization of power transmission and the matching of different rotational speeds between input and output components.

6. Multiple Pulley Systems: Pulleys can be combined in systems to achieve increased mechanical advantage or to create complex motion patterns. In systems with multiple pulleys, such as block and tackle arrangements, the load is distributed over several segments of rope or belt, further reducing the effort required to lift heavy objects. These systems are often used in cranes, elevators, and other applications where heavy lifting is necessary.

These basic principles of pulley mechanics form the foundation for the understanding and application of pulleys in mechanical systems. By harnessing mechanical advantage, force transmission, directional change, conservation of energy, and speed/torque conversion, pulley systems provide a versatile means of lifting, moving, and manipulating loads in various applications.

éditeur par CX