unidirectional cylinder Sold to Ghana

This article mainly introduces:

Ghana hydraulic cylinder,unidirectional cylinder manufacturer,unidirectional cylinder

(Ghana unidirectional cylinder,produced by Hengyu Hydraulic Co., Ltd）

unidirectional cylinder are widely used in Ghana，because of high work efficiency，excellent fatigue and impact resistance，no need for deceleration device.So our company has designed unidirectional cylinder for customers from Ghana.

Introduction to unidirectional cylinder:

unidirectional cylinder body inspection: The inner surface of the unidirectional cylinder and the piston seal are the main factors causing the leakage in the unidirectional cylinder, if the unidirectional cylinder has a longitudinal tensile mark, even if the new piston seal is replaced, it can not effectively eliminate the fault, the inner surface of the unidirectional cylinder mainly checks whether the dimensional tolerance and shape and position tolerance meet the technical requirements, there is no longitudinal tensile mark, and measures the depth of the longitudinal tensile mark, in order to take the corresponding solution.

The unidirectional cylinder is mainly composed of body, piston, piston rod, unidirectional cylinder head, unidirectional cylinder bottom, piston rod head and related auxiliary devices. The piston divides the unidirectional cylinder into two chambers, and moves reciprocally in the unidirectional cylinder with the help of pressure oil. In order to improve its working effect, there is no sealing ring on the piston to eliminate internal leakage, where the piston rod passes through the unidirectional cylinder head, due to the existence of the gap, it is easy to produce external leakage phenomenon, and the dust can enter the unidirectional cylinder through the gap, so the sealing device and dust prevention reason are set. At the same time, in order to eliminate the influence of eccentric load on the work of the piston, all the unidirectional cylinders must be provided with a considerable length of guide sleeve at the extended end of the piston rod. In addition, in the case of faster piston movement, the phenomenon of mechanical collision between the piston and the unidirectional cylinder bottom and the unidirectional cylinder head is serious, so the buffer deceleration should be set at both ends of the unidirectional cylinder The working medium of the unidirectional cylinder: because it works at room temperature, the ordinary oil-type hydraulic oil can be selected; unidirectional cylinder sealing device: The use of Yx sealing ring, polyurethane (PU) and polytetrafluoroethylene (PTFE) materials combined to achieve a good sealing effect; Buffer mechanism of the unidirectional cylinder: The buffer structure of the unidirectional cylinder is to prevent the piston from colliding with the unidirectional cylinder head at the end of the stroke.

unidirectional cylinder piston rod material selection and technical requirements: (I), because there is no special requirements, so use 45 steel as the piston rod material, the design of the piston rod only withstand pressure stress, so no modulation processing; (ii) The coaxial tolerance of the shaft journal and the outer circle of the mounting piston is not greater than 0.01mm, so as to ensure the coaxial degree of the outer circle of the piston rod and the outer circle of the piston, and avoid the stuck phenomenon of the piston and the unidirectional cylinder, the piston rod and the guide. The vertical tolerance between the end face of the mounting piston and the axis of the piston rod is not more than 0.04mm/100mm to ensure that the piston installation does not produce skew; (iii) The outer circle of the piston rod should pay attention to the roughness; (iv) Because it is operated under low load conditions, surface treatment is omitted.

If the unidirectional cylinder is sliding or crawling (stop and go), check whether there is any astringency inside the unidirectional cylinder. The internal parts of the unidirectional cylinder are improperly assembled, the parts are deformed, worn or the shape and position tolerance is excessive, and the action resistance is too large, so that the piston speed of the unidirectional cylinder changes with the different stroke position, and there is slip or crawl. Most of the reasons are due to poor assembly quality of parts, surface scars or sintered iron filings, so that the resistance increases, the speed decreases. For example, the piston is different from the piston rod or the piston rod is bent, the unidirectional cylinder or the piston rod is offset from the mounting position of the guide rail, and the sealing ring is too tight or too loose. The solution is to repair or adjust, replace damaged parts and remove iron filings. At the same time, check whether the lubrication is good or whether the unidirectional cylinder bore processing is out of whack. Because the piston and unidirectional cylinder, guide rail and piston rod are relative If the unidirectional cylinder is crawling seriously, check whether air has entered the hydraulic system. Air compression or expansion can cause the piston to slip or crawl. The exclusion measures are to check the hydraulic pump, set up a special exhaust device, and quickly operate the exhaust several times in the full stroke. Check the seals at the same time, because the quality of the seals is directly related to slippage or crawling. When the O-ring is used under low pressure, compared with the U-ring, it is easy to slip or crawl because of the higher surface pressure and the larger difference between static and static friction resistance. The surface pressure of the U-shaped sealing ring increases with the increase of pressure, although the sealing effect is correspondingly improved, but the difference between static and static friction resistance is also larger, the internal pressure increases, affecting the rubber elasticity, due to the increase in the contact resistance of the lip, the sealing ring will tip over and the lip elongation, and it is also easy to cause slip or crawling unidirectional cylinder weight composition and calculation. The weight of the unidirectional cylinder is composed of the unidirectional cylinder diameter, the outer diameter and weight of the unidirectional cylinder, the rod diameter, and the weight of the accessories, so in calculation, it is to add all these together to get the specific value. However, if there are special circumstances, it may be calculated separately. This work can be carried out by yourself, but it can also be carried out by professionals, so that mistakes can be avoided.

Answers to some questions about unidirectional cylinder:

Do the collecting cylinder, distributing cylinder and distributing cylinder on the organic heat carrier boiler need to be notified separately as the pressure vessel for construction?
Do not need to be installed as a separate pressure vessel to inform, according to the organic heat carrier boiler can be informed. Write a "special equipment installation, renovation and maintenance notice" issued on it.

The cylinder is moving too fast. I want to slow it down. What can I do?
The hydraulic cylinder is the execution action, and the power source is the hydraulic system. The cylinder speed is too fast, indicating that the system flow is large, the hydraulic system has a hydraulic valve responsible for speed control function, method: 1, by adjusting the speed control valve to reduce the speed; 2, the speed control valve has been adjusted to the lowest, indicating that the hydraulic system design flow is too high, the need to re-configure the hydraulic system according to demand, or the cylinder diameter is changed.