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How to select a hydraulic cylinder model - Hydraulic Manufacturer

How to select a hydraulic cylinder model - Hydraulic Manufacturer

Question: "With a stroke of 300MM and a thrust of 4 tons, which hydraulic cylinder model should be selected?" Hunan Xili Hydraulic Co., Ltd. Answer: The selection of hydraulic cylinder models mainly depends on the inner diameter, operating pressure, and installation Size of the hydraulic cylinder. According to the thrust of 4 tons you provided, it can be calculated that if the operating pressure of the hydraulic cylinder is designed to be 8MPA, then the inner diameter of the hydraulic cylinder is 80, and the hydraulic cylinder Model is 80*40*300-8MPA. A tie-rod type hydraulic cylinder can be used, which is low in Price and easy to maintain. If the operating pressure of the hydraulic cylinder is selected as 16MPA, then the inner diameter of the hydraulic cylinder can be 60.

13

2015

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02

Calibration prohibitions for electro-hydraulic servo systems

Calibration prohibitions for electro-hydraulic servo systems

(1) Selection Taboos of Advanced and Lagging Corrections In electro-hydraulic servo systems, series lagging correction is often used to improve the low-frequency gain and the accuracy of the system. Or, under the condition of ensuring the accuracy of the system, the mid-frequency gain of the system is reduced to reduce the crossover frequency, so as to ensure the stability of the system. Because for hydraulic servo systems characterized by integral and oscillation links, the phase stability margin is easy to ensure, but the gain stability margin is not easy to ensure, so it is not easy to use series advanced correction, which mainly improves the phase margin, but uses series

03

2015

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02

The principle of a typical hydraulic cylinder

The principle of a typical hydraulic cylinder

Working principle: 1. End cap oil inlet type: The oil cylinder's two end caps are connected to pipelines, one of which communicates with oil, and the piston and piston rod run in one direction; the structure is compact and suitable for small oil cylinders. 2. Piston rod oil inlet type: The piston rod is hollow and is connected to the oil, and there is an oil passage at the connection between the piston and piston rod. After oil is passed through, the piston and piston rod run in the other direction; suitable for large oil cylinders. 3. Cylinder body direct inlet type: Large-tonnage single-acting oil cylinders, one end has no end cap (the end cap and cylinder body are welded together), directly supplying oil to the cavity, working in one direction, and the other end using the end cap oil inlet for return or energy storage elements such as springs.

30

2015

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01

How was the quality of Germany, Japan, and South Korea forged?

How was the quality of Germany, Japan, and South Korea forged?

How is German quality achieved? In today's world, "German quality" has become a world-renowned manufacturing Brand. As soon as "Made in Germany" is mentioned, people naturally associate it with German products they have seen or used, from trains, bridges, and buildings to tents, clocks, kitchen utensils, and even faucets, leaving an impression of durability, sophistication, safety, and reliability. "Made in Germany" has become a benchmark for modern industry in people's minds. In Europe, Germany is a relatively late modernizing country with relatively scarce natural resources, but

29

2015

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01

The working principle of a four-column hydraulic press

The working principle of a four-column hydraulic press

The working principle of a four-column hydraulic press is that the oil pump delivers hydraulic oil to the integrated cartridge valve block. Through various check valves and relief valves, the hydraulic oil is distributed to the upper or lower chamber of the hydraulic cylinder. Under the action of high-pressure oil, the hydraulic cylinder moves. A hydraulic press is a device that uses liquid to transmit pressure. When liquid transmits pressure in a closed container, it follows Pascal's law. The hydraulic transmission system of a four-column hydraulic press consists of a power unit, a control unit, an actuator, an auxiliary unit, and a working medium. The power unit usually uses an oil pump as the power unit, generally a gear pump. In order to meet

29

2015

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01

Radio-hydraulic control technology

Radio-hydraulic control technology

Radio-electrohydraulic control technology combines the advantages of electro-hydraulic control technology and wireless communication technology, and can be widely used in fields such as engineering machinery. It not only improves the automation level and operability of engineering machinery, but also improves the working environment of operators and reduces operational errors caused by limited vision. It has been widely used in industries such as construction and mining in engineering machinery, accelerating the process of national industrialization. I. Basic Principles of Radio-Electrohydraulic Control Technology The basic working principle of radio-electrohydraulic control technology: First, the radio-electrohydraulic control system will allow operators or

26

2015

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01

Technical Development of Computer-Aided Hydraulic Integrated Block Design

Technical Development of Computer-Aided Hydraulic Integrated Block Design

Abstract: This article divides the technological development history of computer-aided hydraulic integrated block design software and discusses the technical characteristics of each development stage. In hydraulic system design, the integrated block is the main board that connects the channels or pipelines of various functional valve blocks of the system; it is not only a connection mapping of the hydraulic schematic diagram on the three-dimensional valve block, but also an expansion based on the installation conditions of the functional valve block and the manufacturing process of the integrated block; the design of the integrated block is an assembly design from known functional valve bodies, from the bottom up; the design not only considers the functional valve block on a certain surface of the integrated block

26

2015

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01

Reasons and solutions for poor hydraulic cylinder seal performance

Reasons and solutions for poor hydraulic cylinder seal performance

Everyone knows that after using a hydraulic cylinder for a period of time, the two most common undesirable phenomena are a decrease in operating speed and insufficient thrust. The main reasons for these two situations are as follows: 1. Excessive leakage of hydraulic oil inside the hydraulic cylinder. 2. The oil seal at the end of the hydraulic cylinder is pressed too tightly, but it is also possible that the piston rod has bent, resulting in a significant increase in resistance and friction. 3. The operator frequently uses only a certain section of the stroke when using the cylinder, leading to poor linearity of the cylinder, and in severe cases, causing damage to the hydraulic cylinder.

22

2015

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01

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