Hydraulic cylinder manufacturers--HC news

From 2000 year, HC has operated many types of hydraulic cylinders. Here I’d like to summarize them.

The most popular hydraulic cylinders: double-acting hydraulic cylinders. Double-acting hydraulic cylinders have many series as follows: square hydraulic cylinder, round hydraulic cylinder, light hydraulic cylinder, heavy hydraulic cylinder, self-locking hydraulic cylinder, proximity switches cylinder, metallurgical equipment cylinder and Custom hydraulic cylinder.

We also sold a large number of single-acting hydraulic cylinders in 10 years. The most hydraulic cylinders dimensions are according to buyers’ requests.

In 10 years, HC Hydraulic Cylinder Co., Ltd has our own designing standards for different sizes of hydraulic cylinders.

There are two main designing methods:

1.    Draw bar hydraulic cylinder: this type hydraulic cylinder is widely used in industry factories. Small cylinder barrel always have 4 screws but large cylinder barrel may need 16-20. People can separate the hydraulic cylinder if broke down.

2.    Welded hydraulic cylinder: there is no screw in welded hydraulic cylinder, the cylinder barrel and bottom welded together, the same as glib. The former rod cap is always across or connected to cylinder barrel by screw. In this way, user can separate the piston, rod and seals directly.

Welded hydraulic cylinders have many advantages than draw bar hydraulic cylinders. This cylinder barrel usually narrower and length is shorter, so it makes machine spare parts connection much easier. In addition, because there is no tie rod, it won’t appear the phenomenon that caused by tie rod break down in high pressure or stroke is too long condition.

Due to welded hydraulic cylinders’ surface is very smooth, and are good ways to design multi-stage hydraulic cylinders. Welded hydraulic cylinders are widely used in every field. For example, construction equipment (excavators, bulldozers and graders), cargo equipment (truck, lift gate) and heavy-industry equipment (crane, oil rig, ORV) and so on.

 

 

 

 

1. the heading - prerequisite decides the seal institute in the position heading, for example reciprocation, revolving, screw or fixed. 　　
2. the seal key - for example decision spot is seals or the active spot in the inside diameter tension bar is seals and so on the outer diameter piston. 　　
3. the temperature rank - from the original factory machinery operating instructions consult or according to the practical work environment appraisal operating temperature, decided that must use the material. Related temperature rank's showing may refer to the following production user matters needing attention. 　　
4. the pressure rating - from the original factory machinery operating instructions consult related data, or through observes original seal soft degree of hardness and the structure inference working pressure rank, related pressure rating's showing may refer to the following production user matters needing attention. 　　
5. the size dimension - most users can according to having used the old sample select and purchase, but seal after using period of time, by factors and so on temperature, pressure and attrition affects largely its original size, will choose according to sample can only take a reference, a better method will measure the seal institute in the positionThe metal trough size, the accuracy will be high.

The hydraulic ram, people pay little note about it  in the automobile, the agriculture machine and so on motor vehicle's small spare part, however it  is precisely small fitting, actually becomes modern of  pillar industry. 　　
The hydraulic cylinder is one kind of implementing agency. The hydrauliccylinder generally by the cylinder body, the cylinder pole (connecting rod) and the seal is composed, the cylinder body interior divides into two parts by the piston, passes an oil hole separately. Because the liquid compression ratio is very small, when therefore an oil hole enters time the oil, the piston will be impelled to enable another oil hole to leave the oil, the piston leads the connecting rod to do stretches out (retracts) the movement, otherwise still. 　　
Hydraulic transmission principle: Takes the actuating medium by the fat liquor, transmits the movement through the seal volume's change, transmits the power through the fat liquor internal pressure. 　　
1st, power section: Transforms prime mover's mechanical energy for the fat liquor pressure energy (hydraulic pressure can). For example: Hydraulic pump. 　　
2nd, operative paragraph: Transforms the hydraulic pump input's fat liquor pressure energy to lead the operating mechanism the mechanical energy. For example: Hydraulic ram, oil motor. 　　
3rd, control section: Uses for to control and the adjustment fat liquor pressure, the current capacity and the flow direction. For example: Pressure control valve, flow control valve and direction control valve. 　　
4th, auxiliary body: Front three parts will connect in together, composes a system, plays stores roles and so on oil, filtration, survey and seal. For example: Pipeline and attachment, fuel tank, filter, accumulator, seal and control instrument and so on. 　　
The hydraulic ram principle of work the pressure which a spot exerts willfully on certain volume's liquid, can the size equally to each direction transmission. This means that when uses many hydraulic rams, each hydraulic ram will pull according to the respective speed or pushes, but these speeds are decided the pressure which needs in the motion load. In the hydraulic ram bearing capacity scope same situation, the load bearing minimum load's hydraulic ram will first move, the load bearing biggest load's hydraulic ram will move finally. In order to cause the hydraulic ram synchronization movement, achieves the load to go against in any spot by the identical speed rises, certainly must use the control valve or the synchronization in the system goes against rises the system element.

Hydraulic fluid quality quality, is not only interfering with engineering machinery's normal work, will create  the major damageto the hydraulic system spare part.
First, hydraulic fluid moisture content distinction 　　
1st, ocular estimate estimation by eye: If the fluid oil assumes the cream color opacitas shape, then in the explanation fat liquor includes the massive moisture contents. 　　
2nd, combustion method: With pure, the dry cotton yarn moistens the little examination the fat liquor, then lights with the fire it. If discovers the blasting open sound or the flash sign flip-flop, then in the explanation fluid oil includes many moisture contents. 　　
Second, hydraulic fluid foreign inclusion distinction 　　
1st, feeling view distinction: In the fat liquor has the obvious metal pellet suspension, twists pinches when the immediate knowledge tiny pellet existence with the finger; Under illumination, if has the reflection flash point, then the explanation hydraulic element wore seriously; If the fuel tank base precipitation has the massive sweepings, then explained that the main oil pump or the motor wore seriously. 　　
2nd, warming distinction: May put, in the dry test tube regarding the viscosity low hydraulic fluid to heat up the elevation of temperature purely directly. If discovered that in the test tube the fat liquor presents the precipitation or the suspension, then in the explanation fat liquor included the mechanical impurity. 　　
3rd, filter paper distinction: Regarding viscosity high hydraulic fluid, after available pure gasoline dilution, then uses the clean filter paper to carry on the filtration. If discovered that on the filter paper preserves the massive mechanical impurities (metal powder), then the explanation hydraulic element wore seriously. 　　
4: Sound distinction: If the entire hydraulic system has big, the noise and the vibration off and on, simultaneously the main oil pump sends out “humming sound” sound, even presents the connecting rod “crawling” the phenomenon, observed the fuel tank liquid level by now, the drill tubing export or the transparent liquidometer, will discover the massive froths. This kind of situation showed that the hydraulic fluid has plunged the massive air. 　　
Third, hydraulic fluid viscosity change distinction: 　　
1st, glass plate tilter: Takes a clean glass plate, its level laying aside, and will be measured that a hydraulic pressure oil dripping drop on the glass, simultaneously again drops drop of standard hydraulic fluid in side (same trademark new product hydraulic fluid), then inclines the glass plate, and pays attention to the observation: If were measured that the fat liquor the speed of flow and the flowing are away from are bigger than the standard fat liquor, then explained that its ratio of viscosities standard fat liquor is low, otherwise, then explained that its ratio of viscosities standard fat liquor is high. 　　
2nd, glass jar inversion law: The hydraulic pressure fat liquor which and the standard fat liquor measured distinguishes abundantly (do not install too fully) in two sizes and the length same clear-glass bottle, uses the plug to block again two bottle mouths. Two bottles lays aside abreast in row in together, then at the same time rapidly two bottles of inversions. If were measured that the hydraulic fluid rises quickly in bottle air bubble compared to the standard fat liquor's in bottle air bubble, then the showing fat liquor's ratio of viscosities standard fat liquor viscosity is low, otherwise, then the showing fat liquor ratio of viscosities standard fat liquor viscosity is high; If two kind of fat liquor air bubble rise's speed is close, then the showing viscosity is also similar