Product Description
Knuckleboom loaders have become indispensable in the material handling industry, providing efficient and versatile solutions for various applications.
One of the key components that empower these machines is the hydraulic cylinder. With its robust design and exceptional power, the hydraulic cylinder plays a crucial role in enhancing the performance and functionality of knuckleboom loaders.
The integration of hydraulic cylinders in knuckleboom loaders has revolutionized the material handling industry.
Hydraulic cylinders are essential components in the operation of wheel skidders, which are widely used in forestry and construction industries. These powerful machines are designed to efficiently transport and load heavy logs and debris in rugged terrains.
The hydraulic cylinders in wheel skidders are responsible for providing the necessary force and control to perform various tasks, making them vital for the machine's overall performance and productivity,enabling efficient and precise operation in forestry and construction industries.
Their ability to generate high forces, adjustability, and durability make them indispensable for lifting, carrying, and maneuvering heavy loads in challenging terrains.
Hydraulic cylinders are essential components in track feller bunchers, heavy-duty machines used in the forestry industry for tree harvesting and processing. These cylinders play a vital role in various functions of the machine, providing the necessary power and control for efficient operations.
Hydraulic cylinders are used for the stabilization and leveling of the track feller buncher. These cylinders help maintain the stability of the machine on uneven terrain, ensuring safe and secure operations. They allow the machine to adjust its position and balance to overcome obstacles and maintain stability during tree cutting and handling.
Hydraulic cylinders play a vital role in the operation of wheel feller bunchers, which are powerful machines used in the forestry industry for tree harvesting and processing.
These cylinders are essential for various functions, such as controlling the cutting head, the boom arm, and the grapple. By exerting hydraulic pressure, these cylinders provide the necessary force and precision to efficiently cut and process trees.
About Us
Established in 1988 , HangZhou LD Machinery Co, LTD. (hereinafter referred to "LD") is a leading manufacturer specializing in the design, research, development, manufacture and marketing in the hydraulic industry. Being one of major suppliers of customized components and cylinders for manufacturers spreaded all over the world, the company is committed to offer high quality products with competitive prices and excellent service worldwide.
Headquartered in HangZhou City, ZHangZhoug Province, the company wholly owns a subsidiary production factory named "HangZhou YUEWEI Hydraulic Technology Co., Ltd", which covers an area of more than 380,000 square meters , possesses abundant technical strength and sound production management system, superior machining production equipment, strict and effective quality control system, advanced and excellent inspection instruments.
More than 35 years experience in machining industry, with over 10 experienced technical engineers and 150 skilled workers, LD has a senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining, can handle special material, structure, defect and processing, meet the evolving needs, and provide optimal solution and real one-stop service to customers.
Hydraulic Cylinder Producing Process
Step1: Quality Control on Raw Material
We have our own lab in factory, inspect the raw material and do the test. For every batch of material we received, we will ask supplier provide their certificate, and then cut them to do the test again to see if the results match the certification. Also, every batch we received, we will cut them into pieces to check the air bubbles. Once they are all qualified, we will accept it, and all detail information will be recording in our ERP system. We will also pay lot of attention on the salt spray test for chrome rod. Every month, we will cut the material, put them into test machine to see if it reach the requirement. All the result will be recorded at our QC department. If customer need, we can provide it.
Step2: Quality Control on Machining
we start doing components machining from 1988 with 36 years experience now and insist doing 100% inspection. We spend lots of money, invest on auto robots and machines. Now half of the producing line is by robot so that we can ensure our quality be stable good. For every part of the cylinder, we do 3 times inspecting. Firstly, workers will do self inspection. Secondly, we have tour-hour inspection checking the products, 2 times in the morning and 2 times in the afternoon, make sure that every step is good. After the products are all completed, we will do 100% inspection. For thread, for the tolerance, everything, we need double check. Also, we have specific warehouse just for the measuring tools. Every inspector have their own measuring tool and we will check the measuring tools regularly to make sure they are all in good condition, so that the measuring results will be convincing.
Step3: Quality Control on Welding
We are qualified to AWS certification, which is very popular in North American market. First, for the visual test, we will make sure that every components are welded good, look beautiful. And the second, we need to check the penetration. We have more than 15 years experience, we do know what kind of designing angle can make the cylinder welding strong. Once we finish the first article, we will cut it and analyse the welding to see if it is fulfill the groove. And then do the radiographic testing to make sure there is no gap inside. What's more, we will do the ultrasonic test to check the program for the robot. Now 80% of welding is doing by robot. Once the program confirmed, no 1 can change it unless the welding manager, and they only have 5% right.
Step4: Quality Control on Assembling
For assembling, we have some difference with others. The brand we uses for seals are all those famous brand like Aston, Parker, Hallite. The cylinder we give to our customer has 2 years warranty. For our company, we engrave our part number and manufacturing date for the quality warranty. So no matter for seals or any others, as long as they are parts of cylinder, if it is under 2 years, we will take responsibility for them. And we will do the test for every cylinder like for pressure after we finish assembling.
Step5: Quality Control on Painting
We have our half auto painting line. Right now, we can paint about 1500 cylinders per day, which is about 1 container. Before we do the painting, we will do the wash first and for every cylinder, we will test for hardness, thickness and adhesion to make sure the painting are all good, which will be recorded into OQC report, print out and stick on the box, ship to you with your products.
Step6: Hydraulic Cylinder Packing
For every cylinder, we have the stick to show the detail information like bore size, stroke and working pressure. And we will use individual plastic bag packing. If customer need, we can also use individual carton box packing. We will fasten 1 floor after 1 floor with plat, so customer can only cut what they need and other layer will still be fasten. Moreover, there will be plywood pallet or plywood box for customer choosing. We will also send the loading picture to customer after we ship them to make sure everything is well loaded in China.
Packing Reference
Order Process
Enterprise Features
FAQ
Q1. What is LD product's quality assurance?
100% inspection for each product before shipping with inspection rereport for tracking.
Q2: How long is the warranty on LD products?
The warranty is 2 years for general products since the date of shipment.
Q3: How LD deal with the quality problem during warranty period?
1. LD will take the corresponding cost caused by customer local reparing.
2. LD will provide the product by free if the repair cost is higher than the product value, but the freight involved shall be borne by customer side.
Q4: How to ensure the order can be shipped on time?
LD will send the "production schedule" every week after receiving customers' orders. If any delays, LD will inform customers 3 weeks in advance, so as to facilitate the customer to arrange the schedule.
Q5: Does LD offer delivery service?
Yes. LD has deep cooperation with logistics companies all over the world to provide customers with quick and convenient "Door-to-Door services",including sea, air and express.
Q6: How LD control the product quality?
1. Raw materials: We will test the material of each batch of raw materials we receive, and the piston rod will be tested with salt spray. This is to ensure that the material of our products meets the requirements at the beginning.
2. Processing: We have the leading machining equipment, and obtained ISO9001 certification.
3. Welding: Our factory is equipped with welding robots, and has obtained the AWS certification.
4. Assembly pressure test: 100% testing with OQC report for cHangZhou. The seals we use are: Hallite, Aston and Gapi
/* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
| Certification: | ISO9001 |
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| Pressure: | Medium Pressure |
| Work Temperature: | Normal Temperature |
| Acting Way: | Double Acting |
| Working Method: | Straight Trip |
| Adjusted Form: | Regulated Type |
| Samples: |
US$ 300/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
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How do hydraulic cylinders handle the challenges of precise positioning and control?
Hydraulic cylinders are designed to handle the challenges of precise positioning and control with a combination of engineering principles and advanced control systems. These challenges often arise in applications where accurate and controlled movements are required, such as in industrial automation, construction, and material handling. Here's a detailed explanation of how hydraulic cylinders overcome these challenges:
1. Fluid Power Control:
- Hydraulic cylinders utilize fluid power control to achieve precise positioning and control. The hydraulic system consists of a hydraulic pump, control valves, and hydraulic fluid. By regulating the flow of hydraulic fluid into and out of the cylinder, operators can control the speed, direction, and force exerted by the cylinder. The fluid power control allows for smooth and accurate movements, enabling precise positioning of the hydraulic cylinder and the attached load.
2. Control Valves:
- Control valves play a crucial role in handling the challenges of precise positioning and control. These valves are responsible for directing the flow of hydraulic fluid within the system. They can be manually operated or electronically controlled. Control valves allow operators to adjust the flow rate of the hydraulic fluid, controlling the speed of the cylinder's movement. By modulating the flow, operators can achieve fine control over the positioning of the hydraulic cylinder, enabling precise and accurate movements.
3. Proportional Control:
- Hydraulic cylinders can be equipped with proportional control systems, which offer enhanced precision in positioning and control. Proportional control systems utilize electronic feedback and control algorithms to precisely regulate the flow and pressure of the hydraulic fluid. These systems provide accurate and proportional control over the movement of the hydraulic cylinder, allowing for precise positioning at various points along its stroke length. Proportional control enhances the cylinder's ability to handle complex tasks that require precise movements and control.
4. Position Feedback Sensors:
- To achieve precise positioning, hydraulic cylinders often incorporate position feedback sensors. These sensors provide real-time information about the position of the cylinder's piston rod. Common types of position feedback sensors include potentiometers, linear variable differential transformers (LVDTs), and magnetostrictive sensors. By continuously monitoring the position, the feedback sensors enable closed-loop control, allowing for accurate positioning and control of the hydraulic cylinder. The feedback information is used to adjust the flow of hydraulic fluid to achieve the desired position accurately.
5. Servo Control Systems:
- Advanced hydraulic systems employ servo control systems to handle the challenges of precise positioning and control. Servo control systems combine electronic control, position feedback sensors, and proportional control valves to achieve high levels of accuracy and responsiveness. The servo control system continuously compares the desired position with the actual position of the hydraulic cylinder and adjusts the flow of hydraulic fluid to minimize any positional error. This closed-loop control mechanism enables the hydraulic cylinder to maintain precise positioning and control, even under varying loads or external disturbances.
6. Integrated Automation:
- Hydraulic cylinders can be integrated into automated systems to achieve precise positioning and control. In such setups, the hydraulic cylinders are controlled by programmable logic controllers (PLCs) or other automation controllers. These controllers receive input signals from various sensors and use pre-programmed logic to command the hydraulic cylinder's movements. The integration of hydraulic cylinders into automated systems allows for precise and repeatable positioning and control, enabling complex sequences of movements to be executed with high accuracy.
7. Advanced Control Algorithms:
- Advancements in control algorithms have also contributed to the precise positioning and control of hydraulic cylinders. These algorithms, such as PID (Proportional-Integral-Derivative) control, adaptive control, and model-based control, enable sophisticated control strategies to be implemented. These algorithms consider factors such as load variations, system dynamics, and environmental conditions to optimize the control of hydraulic cylinders. By employing advanced control algorithms, hydraulic cylinders can compensate for disturbances and achieve precise positioning and control over a wide range of operating conditions.
In summary, hydraulic cylinders overcome the challenges of precise positioning and control through the use of fluid power control, control valves, proportional control, position feedback sensors, servo control systems, integrated automation, and advanced control algorithms. By combining these elements, hydraulic cylinders can achieve accurate and controlled movements, enabling precise positioning and control in various applications. These capabilities are essential for industries that require high precision and repeatability in their operations, such as industrial automation, robotics, and material handling.
Customization of Hydraulic Cylinders for Marine and Offshore Applications
Yes, hydraulic cylinders can be customized for use in marine and offshore applications. These environments present unique challenges, such as exposure to corrosive saltwater, high humidity, and extreme operating conditions. Customization allows hydraulic cylinders to meet the specific requirements and withstand the harsh conditions encountered in marine and offshore settings. Let's delve into the details of how hydraulic cylinders can be customized for marine and offshore applications:
- Corrosion Resistance: Marine and offshore environments expose hydraulic cylinders to corrosive elements, such as saltwater. To mitigate corrosion, hydraulic cylinders can be customized with materials and surface treatments that provide enhanced corrosion resistance. For example, cylinders can be constructed from stainless steel or coated with protective layers like chrome plating or specialized coatings to withstand the corrosive effects of saltwater.
- Sealing and Environmental Protection: Hydraulic cylinders for marine and offshore applications require robust sealing systems to prevent water ingress and protect internal components. Customized sealing solutions, such as high-quality seals, wipers, and gaskets, can be employed to ensure effective sealing and resistance to water, debris, and contaminants. Additionally, hydraulic cylinders can be designed with protective features like bellows or boots to shield vulnerable areas from environmental elements.
- High-Pressure and Shock Resistance: Marine and offshore operations may involve high-pressure hydraulic systems and encounters with dynamic loads or shocks. Customized hydraulic cylinders can be engineered to withstand these demanding conditions. They can be designed with reinforced construction, thicker walls, and specialized components to handle high-pressure applications and absorb shock loads, ensuring reliable performance and durability.
- Temperature and Fluid Compatibility: Marine and offshore applications can expose hydraulic cylinders to extreme temperature variations and specific fluid requirements. Customization allows the selection of materials, seals, and fluids compatible with the anticipated temperature range and the specific fluid being used. Hydraulic cylinders can be tailored to maintain optimal performance and reliability under challenging temperature conditions and with the designated fluid type.
- Mounting and Integration: Customized hydraulic cylinders can be designed to facilitate easy integration and mounting within marine and offshore machinery. Mounting options can be tailored to suit the available space and structural requirements of the equipment. Additionally, customized hydraulic cylinder designs can incorporate features for easy maintenance, accessibility, and connection to the hydraulic system, ensuring convenient installation and serviceability in marine and offshore applications.
In summary, hydraulic cylinders can be customized to meet the unique demands of marine and offshore applications. Customization enables the integration of corrosion-resistant materials, robust sealing systems, high-pressure and shock-resistant designs, temperature and fluid compatibility, as well as optimized mounting and integration features. By tailoring hydraulic cylinders to the specific requirements of marine and offshore environments, reliable performance, extended service life, and efficient operation can be achieved in these challenging operating conditions.
What maintenance practices are essential for extending the lifespan of hydraulic cylinders?
Maintaining hydraulic cylinders is crucial for extending their lifespan and ensuring optimal performance. Regular maintenance helps prevent premature wear, damage, and failure, ultimately reducing downtime and saving costs. Here are some essential maintenance practices to consider for extending the lifespan of hydraulic cylinders:
1. Regular Inspections:
- Conduct routine visual inspections of hydraulic cylinders to identify any signs of damage, leaks, or wear. Inspect the cylinder body, piston rod, seals, and mounting points. Look for fluid leaks, rust, dents, or any abnormal wear patterns. Early detection of issues allows for timely repairs or replacements, preventing further damage and extending the lifespan of the cylinder.
2. Cleanliness:
- Maintain a clean environment around hydraulic cylinders to prevent contaminants from entering the system. Dust, dirt, and debris can damage seals and other internal components, leading to accelerated wear and reduced performance. Regularly clean the cylinder and its surroundings to minimize the risk of contamination.
3. Proper Lubrication:
- Adequate lubrication is critical for the smooth operation and longevity of hydraulic cylinders. Follow the manufacturer's recommendations for lubrication intervals and use the appropriate lubricant. Apply lubrication to the cylinder's moving parts, such as the piston rod, to reduce friction and minimize wear.
4. Seal Maintenance:
- Seals play a vital role in preventing hydraulic fluid leaks and maintaining the cylinder's performance. Inspect and replace worn or damaged seals promptly. Ensure that seals are properly installed and lubricated. Regularly clean the seal grooves to remove any debris that could compromise seal effectiveness.
5. Pressure Checks:
- Periodically check the hydraulic system's pressure to ensure it is within the recommended operating range. Excessive pressure can strain the cylinder and its components, leading to premature wear. Monitor pressure levels and make adjustments as necessary to prevent overloading the cylinder.
6. Control Valve Maintenance:
- Maintain and inspect control valves that regulate the flow and direction of hydraulic fluid. Ensure that the valves are functioning correctly and not causing excessive stress or pressure spikes in the cylinder. Clean or replace control valves if they are damaged or malfunctioning.
7. Cylinder Alignment:
- Proper alignment of hydraulic cylinders is essential for their longevity. Misalignment can cause excessive side loads, leading to uneven wear and potential damage. Ensure that the cylinder is correctly aligned with other components and that the mounting points are secure.
8. Preventing Overloading:
- Avoid subjecting hydraulic cylinders to loads exceeding their rated capacity. Overloading can cause internal damage, seal failure, and reduced lifespan. Ensure that the load requirements are within the cylinder's capabilities and consider using safety devices like overload protection systems when necessary.
9. Training and Operator Awareness:
- Provide proper training to equipment operators on the correct use and handling of hydraulic cylinders. Operators should be aware of the cylinder's limitations, safe operating procedures, and the importance of regular maintenance. Promote a culture of proactive maintenance and encourage operators to report any potential issues promptly.
10. Documentation and Record-Keeping:
- Maintain detailed documentation of all maintenance activities, including inspections, repairs, and replacements. Keep records of lubrication schedules, pressure checks, and any maintenance performed on the hydraulic cylinders. This documentation helps track the cylinder's history, identify recurring issues, and plan future maintenance effectively.
By following these maintenance practices, hydraulic cylinder lifespan can be extended, ensuring reliable performance and reducing the risk of unexpected failures. Regular inspections, cleanliness, proper lubrication, seal maintenance, pressure checks, control valve maintenance, cylinder alignment, preventing overloading, operator training, and documentation contribute to the overall longevity and optimal functioning of hydraulic cylinders.
editor by CX 2024-02-05