Product Description
BALE WRAPPER
Bale wrapper is a machine that is used to wrap bales of hay or straw. It is typically uses a hydraulic cylinder to lift and rotate the bale. The hydraulic cylinder is a crucial component of the bale wrapper as it provides the necessary force to move and manipulate the bale. It also allows for precise control over the position and rotation of the bale during the wrapping process. The hydraulic cylinder is connected to the lifting mechanism of the bale wrapper, which lifts the bale from the ground and rotates it into the wrapping position. Once the bale is wrapped, the hydraulic cylinder lowers it back down to the ground.
TRACTOR
The tractor is a crucial piece of agricultural machinery, revolutionizing farming operations through its powerful capabilities. Designed for versatility, it can perform a range of tasks, from tilling fields to planting and harvesting crops. The hydraulic cylinder is an integral part of the tractor, connected to the hydraulic system. It converts the tractor’s mechanical energy into hydraulic power, essential for manipulating various implements and attachments. The cylinder enables farmers to control these implements with precision and ease, ensuring effective and efficient completion of agricultural operations.
CULTIVATOR
The cultivator is an agricultural equipment which designed to till and cultivate the soil, making it ready for planting. The cultivator breaks up and mixes the soil, removing weeds and rocks, and generally prepares the ground for optimal plant growth. At the heart of the cultivator lies the hydraulic cylinder. This cylinder is connected to the tractor’s hydraulic system and converts the tractor’s mechanical energy into hydraulic power. The hydraulic cylinder powers the cultivator’s various moving parts, such as the tines or blades that till the soil. It allows farmers to control the depth and intensity of tillage, ensuring that the soil is properly prepared for planting.
SPRAYER
The sprayer is used to spray liquid fertilizers, pesticides, or herbicides CHINAMFG crops in agricultural. The sprayer has a large tank that holds the liquid to be sprayed, and a set of spray nozzles that atomize the liquid and distribute it over the crops. At the heart of the sprayer lies the hydraulic cylinder which is connected to the tractor’s hydraulic system and converts the tractor’s mechanical energy into hydraulic power. The hydraulic cylinder powers the various moving parts of the sprayer, such as the boom that extends outwards from the tractor and carries the spray nozzles. It allows farmers to control the height and width of spraying, ensuring that the liquid is applied uniformly across the field.
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
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| Certification: | ISO9001 |
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| Work Temperature: | -40 Degree to +120 Degree |
| Acting Way: | Double Acting or Single Acting |
| Structure: | Piston Type |
| Material: | 20#Steel/45#Steel |
| Seals: | Packer/Hallite/Gapi |
| Samples: |
US$ 75/Piece
1 Piece(Min.Order) | |
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| Customization: |
Available
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How does a double-acting hydraulic cylinder manage variations in load capacity and weight?
A double-acting hydraulic cylinder is designed to effectively manage variations in load capacity and weight in hydraulic systems. Here’s a detailed explanation:
1. Adjustable Force Output: Double-acting hydraulic cylinders allow for adjustable force output by controlling the hydraulic pressure applied to the cylinder. By adjusting the pressure in the hydraulic system, the force generated by the cylinder can be varied to match the specific load requirements. This feature enables the cylinder to handle variations in load capacity and weight effectively.
2. Mechanical Advantage: Double-acting hydraulic cylinders leverage mechanical advantage to manage variations in load capacity and weight. The cylinder’s design incorporates a larger surface area on the cap end of the piston compared to the rod end. This size difference creates a force amplification effect, allowing the cylinder to exert greater force during the extension stroke. This mechanical advantage enables the cylinder to handle heavier loads and compensate for variations in weight.
3. Pressure Compensation: Double-acting hydraulic cylinders can compensate for variations in load capacity and weight by adjusting the hydraulic pressure in the system. When the load increases, the hydraulic pressure can be increased to generate a higher force output. Conversely, when the load decreases, the pressure can be reduced to match the reduced force requirement. This pressure compensation capability allows the cylinder to adapt to varying load conditions.
4. Position Feedback and Control: To effectively manage variations in load capacity and weight, double-acting hydraulic cylinders can be equipped with position feedback devices and control systems. These devices provide real-time information about the cylinder’s position and can be used to adjust the force output accordingly. By monitoring and controlling the cylinder’s position, the system can respond to changes in load capacity and weight, ensuring optimal performance.
5. Accumulator Integration: Double-acting hydraulic cylinders can be integrated with hydraulic accumulators to manage variations in load capacity and weight. An accumulator is a device that stores hydraulic energy in the form of pressurized fluid. During periods of low load or weight, excess hydraulic energy can be stored in the accumulator. When the load or weight increases, the stored energy can be released to supplement the hydraulic power and provide additional force. This integration helps manage variations in load capacity effectively.
6. System Design and Sizing: Proper system design and sizing play a crucial role in managing variations in load capacity and weight. The hydraulic system, including the double-acting cylinder, should be appropriately sized and selected based on the expected load range. A well-designed system takes into account factors such as the maximum expected load, safety factors, and anticipated variations in weight. By selecting the right cylinder size and ensuring adequate system capacity, variations in load and weight can be effectively managed.
By incorporating these features and considerations, double-acting hydraulic cylinders can effectively manage variations in load capacity and weight, providing reliable and efficient force generation in a wide range of applications.
How does a double-acting hydraulic cylinder contribute to stable and safe force application?
A double-acting hydraulic cylinder plays a crucial role in achieving stable and safe force application. Here’s a detailed explanation:
1. Bidirectional Force Generation: One of the key features of a double-acting hydraulic cylinder is its ability to generate force in both directions. Unlike single-acting cylinders that can exert force in only one direction, double-acting cylinders can apply force in both the extending and retracting strokes. This bidirectional force generation allows for controlled and balanced force application, contributing to stability during various tasks.
2. Precise Force Control: Double-acting hydraulic cylinders offer precise force control, which enhances stability and safety. The flow rate and pressure of the hydraulic fluid can be regulated using valves and control mechanisms. By adjusting these parameters, operators can precisely control the speed and force exerted by the cylinder. This level of control ensures that the force is applied accurately and safely, preventing sudden or uncontrolled movements that could lead to accidents or damage.
3. Damping and Shock Absorption: Double-acting hydraulic cylinders are equipped with features that contribute to damping and shock absorption. They often incorporate cushioning mechanisms, such as adjustable cushions or shock absorbers, at the end of the cylinder stroke. These cushions help decelerate the piston before it reaches the end of its travel, reducing impact forces and preventing abrupt stops. Damping and shock absorption features contribute to stable force application by minimizing vibrations and preventing damage to the cylinder and the surrounding equipment.
4. Load Balancing: In many applications, double-acting hydraulic cylinders are used in pairs or multiple cylinders are synchronized to balance loads. By distributing the load across multiple cylinders, the force application becomes more stable and evenly distributed. This load balancing technique ensures that each cylinder shares the load proportionally, reducing the risk of overloading and providing consistent and stable force application.
5. Robust Construction and Safety Measures: Double-acting hydraulic cylinders are built with robust construction and incorporate safety measures to ensure stable and safe force application. They are designed to withstand high pressures and heavy loads, minimizing the risk of failure or unexpected movements. Additionally, safety features such as pressure relief valves and emergency stop mechanisms are often integrated into hydraulic systems to protect against excessive forces and provide fail-safe operation.
Through bidirectional force generation, precise force control, damping and shock absorption features, load balancing techniques, as well as robust construction and safety measures, double-acting hydraulic cylinders contribute significantly to stable and safe force application. These features make them reliable components in a wide range of industries, including manufacturing, construction, and transportation.
What industries commonly use double-acting hydraulic cylinders in their equipment?
Double-acting hydraulic cylinders are widely used across various industries where controlled linear force is required. Here’s a detailed explanation of the industries that commonly utilize double-acting hydraulic cylinders in their equipment:
1. Manufacturing and Machinery: The manufacturing and machinery industries extensively use double-acting hydraulic cylinders in equipment such as hydraulic presses, material handling systems, assembly lines, robotics, and automation systems. These cylinders provide the necessary force for precise movement, positioning, and operation of components and machinery.
2. Construction and Earthmoving: In the construction and earthmoving sector, double-acting hydraulic cylinders are found in equipment like excavators, backhoes, loaders, bulldozers, cranes, and concrete pumps. They enable the controlled lifting and lowering of heavy loads, extension and retraction of booms and arms, and operation of various hydraulic attachments.
3. Mining and Extraction: Double-acting hydraulic cylinders play a crucial role in mining operations. They are used in equipment such as hydraulic shovels, loaders, crushers, and drilling rigs. These cylinders provide the force necessary for excavation, transportation, and processing of minerals and ores.
4. Agriculture and Farming: In the agricultural sector, double-acting hydraulic cylinders are utilized in machinery and equipment such as tractors, harvesters, sprayers, loaders, and hydraulic implements. They enable functions like lifting and lowering of implements, controlling hydraulic systems for precise operation, and powering attachments such as plows, mowers, and loaders.
5. Automotive and Transportation: Double-acting hydraulic cylinders are employed in various automotive and transportation applications. They are found in vehicle suspension systems, steering mechanisms, hydraulic brakes, dump trucks, garbage trucks, and lifting platforms. These cylinders provide the necessary force for controlled movement, stability, and safety.
6. Aerospace and Aviation: The aerospace and aviation industries utilize double-acting hydraulic cylinders in aircraft landing gear systems, wing flaps, control surfaces, and cargo doors. These cylinders provide the force required for smooth and controlled movement, ensuring safe and efficient operation of aircraft.
7. Marine and Offshore: In the marine and offshore industries, double-acting hydraulic cylinders are used in ship steering systems, hatch covers, cranes, winches, and offshore drilling equipment. They enable precise control of movements and operations in challenging marine environments.
8. Energy and Power Generation: Double-acting hydraulic cylinders are employed in power generation equipment such as hydroelectric turbines and gates, wind turbine pitch systems, and steam turbine control systems. They enable the precise control of mechanical components and the generation of force in both directions.
These are some of the major industries where double-acting hydraulic cylinders are commonly used. However, their versatility and ability to provide bidirectional force make them applicable in many other sectors that require controlled linear force in their equipment and machinery.
editor by Dream 2024-05-14