Product Description
Product overview:
Servo hydraulic cylinder is the hydraulic actuator in the electro – hydraulic servo system.As the servo hydraulic cylinder is a key link in the closed loop of the electro-hydraulic servo system, its performance index directly affects the precision and the dynamic and static quality of the system.
Servo hydraulic cylinder and common hydraulic cylinder, cylinder and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device 5 parts.
Servo cylinder is the servo motor and screw integrated design of modular products, the servo motor rotation into linear motion, at the same time the servo motor zui good advantages – accurate speed control, accurate revolution control, accurate torque control into – accurate speed control, accurate position control, accurate thrust control;High precision linear motion series of new revolutionary products.
Product advantages:
The servo hydraulic cylinder manufactured by HangZhou xinlaifu hydraulic pneumatic equipment co., ltd. has the following advantages:
1. Low friction, no crawling, high frequency response;Low internal leakage, low external leakage;Its friction pair is usually treated specially.
2. Steel cylinder: hard chrome plated polishing or fine grinding of internal friction surface.
3. Piston seal: o-ring made of polyethylene filled with glass beads.
4. Piston rod seal: pre-added lip seal ring made of butadiene rubber, also with a small cone inside the CZPT sleeve static and dynamic pressure seal ring.
Piston rod CZPT sleeve: FE3N cast iron with high wear resistance and hardness.
6. Dust ring: bimetal type, and pre-ground into a cutting edge type.
7. Oil pipe: the oil pipe between the servo valve and the hydraulic cylinder passes through the channel directly drilled in the ferry block and preinstalled thick wall rigid short pipe (accessories).
The servo hydraulic cylinder manufactured by us is mainly reflected in the following aspects:
1. Hydrostatic bearing seal
The hydrostatic bearing is provided with a hydrostatic piston rod CZPT device, and the rod CZPT device and the seal are in 1 component.The piston rod floats on an oil film and can withstand large transverse shear forces.The pressure supply of the static bearing is realized through the internal structure of the cylinder, which can bear a large lateral force. Because the sealing and dustproof ring with contact do not bear the pressure, the residual friction within the whole pressure range is very small, thus ensuring the high dynamic and high life characteristics of the servo hydraulic cylinder.
2. Ring gap seal
Ring gap seal is a non-contact seal, due to the difference in pressure, so that the oil through the smaller orifice to form a very thin oil film, so as to replace the ordinary seal to achieve the sealing effect, but its zui large lateral force is limited.There is no pressure on the contact seal and dustproof ring, the piston rod is guided by the CZPT element optimized for friction, so the starting friction within the whole pressure range is very small, thus ensuring the servo hydraulic cylinder’s high dynamic and high life characteristics.
The difference between ordinary hydraulic cylinder and servo hydraulic cylinder
Common hydraulic cylinder servo hydraulic cylinder
The cylinder should meet the requirement of strength, stiffness and strength
The force end of the piston rod should meet the requirement of stiffness and there is no instability problem
The effect of fixed stiffness on stability should be calculated when the fixed method meets the requirements of strength and action
The output of the cylinder should satisfy the dynamic index of the system under static load and dynamic load
Cylinder seal is to prevent oil leakage and leakage to prevent internal leakage and leakage, the sealing ring dynamic, static friction coefficient is close, and the friction coefficient as small as possible.If the requirements of repeated speed, sometimes need a certain amount of internal leakage.
The running speed of the cylinder is controlled by the electrical signal, so it is unnecessary to consider the buffering device.
The position of the sensor on the drive cylinder may prevent the travel switch from being considered
The closer the distance between the pump station and the valve stand from the actuator servo valve and the hydraulic cylinder, the better
Few disassembly facilitate tear open outfit, convenient check servo valve and the sensor
Servo cylinder features
Servo cylinder features: closed-loop servo control, control accuracy up to 0.01mm;Fine control thrust, increase pressure sensor, control precision up to 1%;It is easy to connect with PLC and other control systems to achieve high precision motion control.Low noise, energy saving, clean, high rigidity, impact resistance, long life, simple operation and maintenance.The servo cylinder can be trouble-free in harsh environment, and the protection level can reach IP66.Long-term work, and achieve high intensity, high speed, high precision positioning, smooth movement, low noise.So it can be widely used in paper industry, chemical industry, automobile industry, electronic industry, mechanical automation industry, welding industry and so on.
Low cost maintenance: the servo cylinder only needs regular grease injection and lubrication when working in complex environment, and no vulnerable parts need maintenance and replacement, which will reduce a lot of after-sales service costs compared with the hydraulic system and pneumatic system.
Hydraulic cylinder and cylinder zui good alternative: servo cylinder can completely replace the hydraulic cylinder and cylinder, and realize the advantages of more environmental protection, more energy saving, cleaner, easy to connect with PLC and other control systems, to achieve high precision motion control.
Configuration flexibility: can provide very flexible installation configuration, full series of installation components: installation flange, back flange, side flange, rear hinged, lug shaft installation, CZPT module;It can be installed directly with the servo motor or in parallel;Various accessories can be added: limit switch, planetary reducer, pretightening nut, etc.Drive can choose ac brake motor, dc motor, stepper motor, servo motor.
Application field
1. Entertainment industry: robot arms and joints, dynamic seats, etc
2. Military industry: simulation aircraft, simulation and simulation, etc
3. Automobile industry: press machine, test instrument, etc
4. Industrial industry: food machinery, ceramic machinery, welding machinery, lifting platform, etc
| Quantity(Acres) | 1 – 10 | >10 |
| Est. Time(days) | 3 | To be negotiated |
Customer Service
1. You may email us through the Alibaba messaging system if you have a question
or would like to submit a comment.
2. Generally, email will be responded to within 24 hours; except on every Sunday
and holidays. We will reply as soon as we back in office.
2. We will send you tracking information to the e-mail address you have registered with Alibaba.
3. If you don’t see what you are looking for, just send us an e-mail with picture/picture
and we will be glad to help you.
4. Positive feedback is very important to us.
Packaging & Shipping
Delivery Details
Delivery time depends on the destination and other factors, it may up to 7 work days.
In order to ensure you receive you order tax free upon import, we will declare it as a “Sample”with a lower value.This lower price does not reflect the total price you paid.
After we ship the goods, we will email you the shipping information, as well as tracking number.
FAQ
Questions you maybe inquiry
Q1:Could you custom products?
We can manufacture it according to your drawings or samples.
Q2: I want to buy your products, how can I pay?
A :You can pay via T/T , WEST UNION or other payment terms we reach agreement.
Q3: How can you guarantee the quality?
A: One year’s warranty against B/L date.
If You meet with quality problem, we promise to responsible for it.
Q4: If we don’t find what we want on your website, what should we do?
A: You can email us the descriptions and pictures of the products you need, We will check whether we can make it.
Q5: Can we buy 1 pc of each item for quality testing?
A: Yes, we understand quality test is important and we are glad to send 1pc for quality testing.
Q6: What is the lead time?
A: For this product, normally 3 days,3 days and lead time is calculated from the day we receive your deposit.
Exact time is determined by factory schedule.
Our customer say:
Screw Sizes and Their Uses
Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.
The major diameter of a screw shaft
The major diameter of a screw shaft is the distance from the outer edge of the thread on 1 side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is 1 element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.
The pitch diameter of a screw shaft
When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of 1 thread to the corresponding point on the next thread. Measurement is made from 1 thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.
The thread depth of a screw shaft
Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in 1 revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.
The lead of a screw shaft
Pitch and lead are 2 measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are 2 ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with 2 or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.
The thread angle of a screw shaft
The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are 2 types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.
The tapped hole (or nut) into which the screw fits
A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.
