China manufacturer High Strength Mechanical Part Forged Pulley Timing Belt Pulley Drive Pulley Groove Pulley for Container Crane with Best Sales

Productomschrijving

Forged Pulley

Productomschrijving

ZJD can provide the Pulley according to customers technical specifications.

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Bedrijfsprofiel

ZJD is located in Xihu (West Lake) Dis. Economic Development Zone, Xihu (West Lake) Dis. District, HangZhou, ZheJiang , which has very good transportation convenience and location advantages.ZJD own 1 subsidiary, which is located in HangZhou city, ZheJiang province, which is mainly responsible for EMU accessories for CRRC's factory nearby.
ZJD's production and office space is more than 12,000 square meters, and more than 60 sets of various types of CNC machining and quality control equipment.ZJD's main products are widely used in CHINAMFG CR400, CR300, CR200 series standard EMUs, and expanded to subways, export passenger cars and EMUs and other products.
ZJD has more than 60 employees and more than 20 technical management personnel. The technical management team has many years of working experience in the rail transit industry. 

Certificeringen

ZJD has obtained the national high-tech enterprise certification, 6 types of products have passed the high-tech certification, and related products have obtained more than 20 patents. 
ZJD has established a comprehensive quality management system and has got ISO9001 quality management system certification, ISO/TS 22163 (IRIS) international railway industry standard certification, EN15085-2 railway vehicles welding system certification, and CHINAMFG product supply service qualification certification. 

Veelgestelde vragen

1. Who are we?

HangZhou ZJD Rail Equipment Co.,Ltd. was established in 2012, which is a professional manufacturer of rail equipment and accessories.

2. Are you a reliable supplier?
ZJD-Excellent Manufacturer focusing on the rolling stock industry
Provide full-process Design, Production, Testing and Service according to customer requirements.

3.What can you buy from us?
We have designed and supplied a series of products such an air duct systems, piping systerms, pneumatic control units,etc.The product are used in various fields such an EMUs,subways,locomotives,wagon engineering vehicles,etc. 

4. What services can we provide?
Provide customized services of heavy industry products for special requirements.
Provide diversified parts and trade services such as port machinery, steel heavy industry, mining machinery, etc.
Provide customized products for new energy equipment
Provide key process technology solutions for special parts in the field of new energy equipment.

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Waarvoor worden katrollen in de automobielindustrie gebruikt?

Katrollen hebben verschillende toepassingen in de automobielindustrie en dragen bij aan de werking van verschillende systemen in voertuigen. Hier zijn enkele veelvoorkomende toepassingen van katrollen in de automobielindustrie:

1. Motorsystemen: Poelies worden veelvuldig gebruikt in de motorsystemen van voertuigen. De krukaspoelie, ook wel bekend als de harmonische balancer, is verbonden met de krukas van de motor en drijft verschillende motoraccessoires aan door middel van riemen. Deze accessoires kunnen de dynamo, stuurbekrachtigingspomp, waterpomp, airconditioningcompressor en meer omvatten. De rotatie van de krukaspoelie drijft deze accessoires aan, waardoor ze hun respectievelijke functies kunnen uitvoeren.

2. Serpentine riemsystemen: Moderne voertuigen gebruiken vaak een serpentine riemsysteem, wat een enkele, lange riem is die meerdere motoraccessoires tegelijkertijd aandrijft. De serpentine riem loopt rond verschillende poelies, waaronder de krukaspoelie, spanrol, meelooprollen en accessoirepoelies. Deze poelies geleiden en handhaven de spanning van de serpentine riem, wat zorgt voor een efficiënte vermogensoverdracht naar de motoraccessoires.

3. Timing Belt/Chain Systems: Timing belts or chains are used in internal combustion engines to synchronize the opening and closing of engine valves with the movement of the pistons. Pulleys known as timing belt pulleys or timing sprockets are mounted on the camshafts and crankshafts, and they work together with the timing belt or chain to ensure precise valve timing. These pulleys play a crucial role in maintaining engine performance and preventing valve interference.

4. Supercharger/Blower-systemen: Poelies zijn integrale componenten in supercharger- of blower-systemen die worden gebruikt in prestatievoertuigen. Deze systemen comprimeren de binnenkomende lucht om het motorvermogen en de prestaties te vergroten. De poelie op de supercharger of blower wordt aangedreven door de krukaspoelie van de motor via een riem of een aandrijfsysteem. Door de grootte van de poelie te veranderen, kunnen de snelheid en het boostniveau van de supercharger of blower worden aangepast.

5. Spanners en meelooprollen: Spanners en meelooprollen zijn cruciaal voor het handhaven van de juiste riemspanning en -uitlijning in automobielsystemen. Spanners zijn ontworpen om spanning op riemen uit te oefenen, zodat ze tijdens hun werking goed op de poelies blijven zitten. Meelooprollen geleiden de riem en helpen de uitlijning ervan te behouden. Deze poelies dragen bij aan de soepele en betrouwbare werking van verschillende riemaangedreven systemen, verminderen slippen en voorkomen voortijdige slijtage van de riem.

6. Accessoires en hulpsystemen: Katrollen worden ook gebruikt in verschillende hulpsystemen en accessoires in voertuigen. Deze kunnen systemen omvatten zoals elektrische ramen, ruitenwissers, koelventilatoren en meer. Katrollen in deze systemen vergemakkelijken de overdracht van rotatiebeweging van motoren naar mechanische componenten, waardoor de gewenste functionaliteit mogelijk wordt.

Over het algemeen spelen katrollen een belangrijke rol in de automobielindustrie door motoraccessoires aan te drijven, de riemspanning te handhaven, de motortiming te synchroniseren, de prestaties te verbeteren en verschillende hulpsystemen te ondersteunen. Hun goede werking is cruciaal voor de betrouwbare en efficiënte werking van automobielsystemen en -componenten.

What role do pulleys play in modern elevators and hoists?

Pulleys play a crucial role in modern elevators and hoists, enabling the smooth and efficient vertical movement of loads. They are integral components of the lifting mechanisms, providing mechanical advantage and facilitating safe and controlled operation. Here's how pulleys are used in modern elevators and hoists:

1. Lifting Mechanism: In elevators and hoists, pulleys are part of the lifting mechanism that moves the load vertically. They are typically combined with cables, ropes, or belts to create a pulley system. By distributing the load's weight across multiple lines and changing the direction of the applied force, pulleys make it easier to lift heavy loads. The number and arrangement of pulleys can vary depending on the specific design and requirements of the elevator or hoist.

2. Counterweight Systems: Modern elevators often utilize counterweight systems to offset the weight of the elevator car and reduce the amount of power required for operation. Pulleys play a crucial role in these systems by guiding the cables connected to the counterweight. As the elevator car moves up or down, the counterweight moves in the opposite direction, balancing the load. The pulleys in the counterweight system help distribute the weight and ensure smooth movement.

3. Traction Control: Pulleys are also involved in the traction control mechanism of elevators and hoists. Traction elevators use ropes or belts that pass over a series of pulleys, known as sheaves, to create traction. An electric motor drives the sheaves, causing the ropes or belts to move. By adjusting the rotational movement of the sheaves, the speed and direction of the elevator or hoist can be controlled. The pulleys in the traction control system enable precise and reliable operation.

4. Safety Systems: Pulleys play a crucial role in the safety systems of elevators and hoists. For example, in traction elevator systems, overspeed governors utilize pulleys to detect excessive speed and activate the safety brakes in case of a malfunction. The pulleys in these safety systems help monitor and control the elevator's speed, ensuring passenger safety.

5. Maintenance and Service: Pulleys in modern elevators and hoists are designed to be durable and require minimal maintenance. They are often equipped with sealed bearings or other lubrication systems to reduce friction and wear. This ensures the longevity and reliability of the pulley systems, minimizing downtime and maintenance costs.

Overall, pulleys are essential components in modern elevators and hoists, enabling vertical movement, providing mechanical advantage, ensuring safety, and facilitating efficient operation. They contribute to the smooth and controlled lifting of loads, making elevators and hoists reliable and indispensable tools in various industries and buildings.

How does a fixed pulley differ from a movable pulley?

A fixed pulley and a movable pulley are two distinct types of pulleys that differ in their design and functionality. Here's a detailed explanation of their differences:

1. Design and Attachment: A fixed pulley is attached to a stationary structure, such as a ceiling or wall, using a mounting bracket or other means. It remains fixed in place and does not move during operation. In contrast, a movable pulley is attached to the load being moved and moves along with it. It is typically suspended by a rope or cable and can freely move up and down.

2. Mechanical Advantage: When it comes to mechanical advantage, a fixed pulley does not provide any advantage. It changes the direction of the force applied but does not reduce the effort required to lift the load. On the other hand, a movable pulley provides mechanical advantage by reducing the effort needed to lift the load. It distributes the load between the rope segments attached to the movable pulley and the fixed point, making it easier to lift heavy objects.

3. Force Distribution: In a fixed pulley, the force applied to one end of the rope or belt is redirected to change the direction of the force. The load is lifted by pulling the opposite end of the rope. In this case, the force required to lift the load is equal to the weight of the load itself. In a movable pulley, the load is attached to the movable pulley itself. The force required to lift the load is reduced because the weight of the load is distributed between the rope segments attached to the movable pulley and the fixed point.

4. Directional Change: Both fixed and movable pulleys are capable of changing the direction of the applied force. However, the primary function of a fixed pulley is to change the direction of force, while a movable pulley combines force direction change with mechanical advantage. The movable pulley allows the operator to exert force in a more convenient direction while requiring less effort to lift the load.

5. Applications: Fixed pulleys are commonly used in combination with other pulleys to create more complex systems, such as block and tackle arrangements. They are often used in scenarios where the primary objective is to change the direction of force. Movable pulleys, on the other hand, are frequently used in systems that require mechanical advantage or a reduction in the effort needed to lift heavy objects. They are often found in applications such as lifting systems, cranes, and elevators.

Overall, the key differences between a fixed pulley and a movable pulley lie in their design, mechanical advantage, force distribution, and applications. While a fixed pulley primarily changes the direction of force, a movable pulley combines force direction change with mechanical advantage, making it easier to lift heavy loads.

redacteur door CX