Product Description
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
التعليمات
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 |
| Customization: |
Available
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What advancements in hydraulic cylinder technology have improved energy efficiency?
Advancements in hydraulic cylinder technology have led to significant improvements in energy efficiency, allowing hydraulic systems to operate more efficiently and reduce energy consumption. These advancements aim to minimize energy losses, optimize system performance, and enhance overall efficiency. Here’s a detailed explanation of some key advancements in hydraulic cylinder technology that have improved energy efficiency:
1. Efficient Hydraulic Circuit Design:
– The design of hydraulic circuits has evolved to improve energy efficiency. Advancements in circuit design techniques, such as load-sensing, pressure-compensated systems, or variable displacement pumps, help match the hydraulic power output to the actual load requirements. These designs reduce unnecessary energy consumption by adjusting the flow and pressure levels according to the system demands, rather than operating at a fixed high pressure.
2. High-Efficiency Hydraulic Fluids:
– The development of high-efficiency hydraulic fluids, such as low-viscosity or synthetic fluids, has contributed to improved energy efficiency. These fluids offer lower internal friction and reduced resistance to flow, resulting in decreased energy losses within the system. Additionally, advanced fluid additives and formulations enhance lubrication properties, reducing friction and optimizing the overall efficiency of hydraulic cylinders.
3. Advanced Sealing Technologies:
– Seal technology has advanced significantly, leading to improved energy efficiency in hydraulic cylinders. High-performance seals, such as low-friction or low-leakage seals, minimize internal leakage and friction losses. Reduced internal leakage helps maintain system pressure more effectively, resulting in less energy waste. Additionally, innovative sealing materials and designs enhance durability and extend seal life, reducing the need for frequent maintenance and replacement.
4. Electro-Hydraulic Control Systems:
– The integration of advanced electro-hydraulic control systems has greatly contributed to energy efficiency improvements. By combining electronic control with hydraulic power, these systems enable precise control over cylinder operation, optimizing energy usage. Proportional or servo valves, along with position or force feedback sensors, allow for accurate and responsive control, ensuring that hydraulic cylinders operate at the required level of performance while minimizing energy waste.
5. Energy Recovery Systems:
– Energy recovery systems, such as hydraulic accumulators, have been increasingly utilized to improve energy efficiency in hydraulic cylinder applications. Accumulators store excess energy during low-demand periods and release it when there is a peak demand, reducing the need for the hydraulic pump to provide the full power continuously. By utilizing stored energy, these systems can significantly reduce energy consumption and improve overall system efficiency.
6. Smart Monitoring and Control:
– Advancements in smart monitoring and control technologies have enabled real-time monitoring of hydraulic systems, allowing for optimized energy usage. Integrated sensors, data analytics, and control algorithms provide insights into system performance and energy consumption, enabling operators to make informed decisions and adjustments. By identifying inefficiencies or suboptimal operating conditions, energy consumption can be minimized, leading to improved energy efficiency.
7. System Integration and Optimization:
– The integration and optimization of hydraulic systems as a whole have played a significant role in improving energy efficiency. By considering the entire system layout, component sizing, and interaction between different elements, engineers can design hydraulic systems that operate in the most energy-efficient manner. Proper sizing of components, minimizing pressure drops, and reducing unnecessary piping or valve restrictions all contribute to improved energy efficiency of hydraulic cylinders.
8. Research and Development:
– Ongoing research and development efforts in the field of hydraulic cylinder technology continue to drive energy efficiency advancements. Innovations in materials, component design, system modeling, and simulation techniques help identify areas for improvement and optimize energy usage. Additionally, collaboration between industry stakeholders, research institutions, and regulatory bodies fosters the development of energy-efficient hydraulic cylinder technologies.
In summary, advancements in hydraulic cylinder technology have resulted in notable improvements in energy efficiency. Efficient hydraulic circuit designs, high-efficiency hydraulic fluids, advanced sealing technologies, electro-hydraulic control systems, energy recovery systems, smart monitoring and control, system integration and optimization, as well as ongoing research and development efforts, all contribute to reducing energy consumption and enhancing the overall energy efficiency of hydraulic cylinders. These advancements not only benefit the environment but also offer cost savings and improved performance in various hydraulic applications.
How do hydraulic cylinders contribute to the efficiency of agricultural tasks like plowing?
Hydraulic cylinders play a crucial role in improving the efficiency of agricultural tasks, including plowing. These cylinders provide several benefits that enhance the performance and productivity of agricultural machinery. Let’s explore how hydraulic cylinders contribute to the efficiency of plowing and other agricultural tasks:
- Powerful Force Generation: Hydraulic cylinders are capable of generating high forces, which is essential for tasks like plowing. The hydraulic system supplies pressurized fluid to the cylinders, converting hydraulic energy into mechanical force. This force is then utilized to drive plow blades through the soil, overcoming resistance and facilitating efficient soil penetration. The power generated by hydraulic cylinders ensures effective plowing, even in tough or compacted soil conditions.
- Adjustable Working Depth: Hydraulic cylinders allow for easy and precise adjustment of the plow’s working depth. By controlling the extension or retraction of the hydraulic cylinder, farmers can adjust the depth of the plow blades according to soil conditions, crop requirements, or their specific preferences. This adjustability enhances efficiency by ensuring optimal soil tillage and minimizing unnecessary energy expenditure. Farmers can adapt the plowing depth to different field areas, optimizing the use of resources and promoting uniform crop growth.
- Responsive Control: Hydraulic systems offer highly responsive control, enabling farmers to make quick adjustments during plowing operations. Hydraulic cylinders respond rapidly to changes in hydraulic pressure and valve settings, allowing for immediate modifications in the plow’s position, depth, or angle. This responsiveness enhances efficiency by facilitating on-the-go adjustments based on soil variations, obstacles, or changing field conditions. Farmers can maintain precise control over the plow’s performance, ensuring effective soil tillage and minimizing the risk of crop damage.
- Implement Versatility: Hydraulic cylinders enable the attachment of various implements to agricultural machinery, expanding their functionality and versatility. In the context of plowing, hydraulic cylinders allow for the attachment and detachment of plow blades or other tillage implements. This versatility enables farmers to adapt their equipment to different soil types, field sizes, or specific plowing requirements. By using hydraulic cylinders, farmers can easily switch between different implements, optimizing their equipment for specific tasks and maximizing efficiency.
- Efficient Time Management: Hydraulic cylinders contribute to time efficiency in agricultural tasks like plowing. With hydraulic systems, farmers can operate plows at higher speeds while maintaining control and precision. The responsive nature of hydraulic cylinders allows for efficient turning, maneuvering, and repositioning of plows, minimizing downtime and optimizing field coverage. This time efficiency translates into increased productivity and reduced overall operational costs. Farmers can accomplish plowing tasks more quickly, allowing them to cover larger field areas in less time.
In summary, hydraulic cylinders significantly contribute to the efficiency of agricultural tasks like plowing. Through powerful force generation, adjustable working depth, responsive control, implement versatility, and efficient time management, hydraulic systems equipped with cylinders enhance the performance and productivity of agricultural machinery. These contributions allow farmers to accomplish plowing tasks more effectively, optimize field operations, and achieve improved overall efficiency in their agricultural practices.
كيف تتعامل الأسطوانات الهيدروليكية مع التغيرات في الحمل والضغط أثناء التشغيل؟
صُممت الأسطوانات الهيدروليكية للتعامل مع تغيرات الحمل والضغط أثناء التشغيل، مما يجعلها متعددة الاستخدامات وفعالة في تطبيقات متنوعة. تعتمد الأنظمة الهيدروليكية على مبدأ نقل القوة عبر سائل غير قابل للانضغاط لتوليد حركة خطية. فيما يلي شرح مفصل لكيفية تعامل الأسطوانات الهيدروليكية مع تغيرات الحمل والضغط:
1. التعامل مع الأحمال:
تتميز الأسطوانات الهيدروليكية بقدرتها على تحمل أحمال مختلفة بالاستفادة من مبدأ قانون باسكال. ووفقًا لهذا القانون، عند تطبيق ضغط على سائل في مكان محصور، ينتقل الضغط بالتساوي في جميع الاتجاهات. في الأسطوانة الهيدروليكية، تُنتج القوة المطبقة على المكبس قوةً متساويةً عند طرف قضيب الأسطوانة. ويحدد حجم المكبس والضغط المطبق القوة المولدة من الأسطوانة. لذلك، تستطيع الأسطوانات الهيدروليكية تحمل نطاق واسع من الأحمال عن طريق ضبط الضغط المطبق على السائل.
2. تعويض الضغط:
تتضمن الأنظمة الهيدروليكية آليات تعويض الضغط للتعامل مع تغيرات الضغط أثناء التشغيل. تُستخدم صمامات أو منظمات تعويض الضغط غالبًا للحفاظ على ضغط ثابت في النظام الهيدروليكي، بغض النظر عن تغيرات الحمل. تضبط هذه الصمامات معدل التدفق أو الضغط تلقائيًا لضمان تشغيل مستقر ومنضبط للأسطوانة الهيدروليكية. من خلال تعويض تغيرات الضغط، تحافظ الأسطوانات الهيدروليكية على قوة خرج ثابتة وتمنع التلف أو عدم الاستقرار الناتج عن الضغط الزائد.
3. صمامات التحكم:
تلعب صمامات التحكم دورًا محوريًا في إدارة تقلبات الضغط والحمل أثناء تشغيل الأسطوانات الهيدروليكية. تتحكم صمامات التحكم الاتجاهية، مثل صمامات البكرة أو صمامات القفاز، في تدفق السائل الهيدروليكي داخل الأسطوانة وخارجها، مما يتيح تحكمًا دقيقًا في تمددها وانكماشها. من خلال ضبط موضع صمام التحكم، يمكن تنظيم سرعة وقوة الأسطوانة الهيدروليكية بما يتناسب مع متطلبات الحمل والضغط في التطبيق. تتيح صمامات التحكم التعامل بكفاءة مع تقلبات الحمل والضغط من خلال توفير تحكم دقيق في النظام الهيدروليكي.
4. المراكم:
تُستخدم المُراكمات الهيدروليكية عادةً للتعامل مع تقلبات الضغط والحمل. تُخزّن المُراكمات السائل الهيدروليكي تحت ضغط، والذي يُمكن إطلاقه أو امتصاصه حسب الحاجة لتعويض التغيرات المفاجئة في الحمل أو الضغط. عندما ينخفض الحمل على الأسطوانة الهيدروليكية، تُطلق المُراكمة السائل المُخزّن للحفاظ على الضغط ومنع ارتفاعه المفاجئ. في المقابل، عندما يزداد الحمل على الأسطوانة، تمتص المُراكمة السائل الزائد للحفاظ على استقرار النظام. باستخدام المُراكمات، تستطيع الأسطوانات الهيدروليكية التعامل بفعالية مع تقلبات الحمل والضغط، مما يضمن تشغيلًا سلسًا ومنضبطًا.
5. أنظمة التغذية الراجعة والتحكم:
قد تتضمن الأنظمة الهيدروليكية المتقدمة أنظمة تغذية راجعة وتحكم لمراقبة وضبط تشغيل الأسطوانات الهيدروليكية آنيًا. توفر مستشعرات الموضع أو مستشعرات الضغط تغذية راجعة حول موضع الأسطوانة وقوتها وضغطها، مما يسمح لنظام التحكم بإجراء تعديلات مستمرة لتحسين الأداء. تتكيف هذه الأنظمة تلقائيًا مع تغيرات الحمل والضغط، مما يضمن تحكمًا دقيقًا وتشغيلًا فعالًا للأسطوانة الهيدروليكية.
6. اعتبارات التصميم:
تُعدّ اعتبارات التصميم السليم، مثل اختيار حجم الأسطوانة وقطر المكبس وقطر القضيب المناسبين، أساسيةً للتعامل مع اختلافات الحمل والضغط. يجب أن يُراعي التصميم أقصى ظروف حمل وضغط متوقعة لضمان عمل الأسطوانة الهيدروليكية ضمن نطاقها المحدد. إضافةً إلى ذلك، يُعدّ اختيار الأختام والمواد والمكونات المناسبة التي تتحمل اختلافات الحمل والضغط المتوقعة أمرًا بالغ الأهمية للحفاظ على موثوقية الأسطوانة الهيدروليكية وطول عمرها.
بفضل استخدام مبادئ الأنظمة الهيدروليكية، ودمج آليات تعويض الضغط، واستخدام صمامات التحكم والمراكم، وتطبيق أنظمة التغذية الراجعة والتحكم، تستطيع الأسطوانات الهيدروليكية التعامل بفعالية مع تغيرات الحمل والضغط أثناء التشغيل. هذه الميزات واعتبارات التصميم تُمكّن الأسطوانات الهيدروليكية من التكيف والأداء الأمثل في مجموعة واسعة من التطبيقات وظروف التشغيل.
editor by CX 2024-01-17