-
With the development of modern petroleum, chemical industry, metallurgy, atomic energy, electronics and aerospace technology, the sealing requirements for high-pressure, ultrahigh pressure, high vacuum, ultrahigh vacuum and even ultrahigh vacuum equipment for different purposes are becoming higher and higher. Some of them have complex structures, with many pipes and transmission mechanisms inside; Some are very large, hundreds of cubic meters, or even thousands of cubic meters. In these devices
Published on: December 21, 2021 Number of hits: 85
-
The flushing scheme of mechanical seals aims to directly inject liquid into the high-pressure side of double or single seals, which is called "flushing". Generally, pumps shall be flushed, especially light hydrocarbon pumps. 1. Flush to dissipate heat. Control the heat generated by the liquid seal. This can be achieved by flushing the seal chamber with liquid to take away heat and control the temperature rise. 2. Lower the liquid temperature. In some cases, liquid temperature
Published on: June 21, 2021 Clicks: 562
-
Control system of dry gas seal - classification of supply gas and requirements Under the condition of correct design based on operating conditions, the operation of dry gas seal mainly depends on the normal matching between the two ends of the seal, namely, the dynamic ring and the static ring. If the gas entering the seal chamber is mixed with small impurities, the reliability and life of the whole dry gas seal system will be seriously affected. Therefore, To ensure its safe operation
Published on: June 16, 2021 Clicks: 374
-
Published on: June 16, 2021 Clicks: 69
-
Reaction kettle is an important equipment of chemical plant, which can be divided into carbon steel reaction kettle, stainless steel reaction kettle and glass lined reaction kettle (enamel reaction kettle) according to the material. Today, let's talk about the precautions in the installation of stainless steel reactor and glass lined reactor. Precautions for installation of enamel reaction kettle Inapplicability of enamel reaction kettle: to ensure the normal service life of enamel reaction kettle
Published on: March 15, 2021 Clicks: 141
-
Grinding technology of mechanical seal sealing surface - manual grinding and mechanical grinding Manual grinding is mainly used for small batch production and repair of single piece. Manual grinding is labor-intensive and requires skilled operators. Mechanical grinding is used in mass production. 1、 Manual grinding Manual grinding generally uses flat plate, which is made of high carbon cast iron, and flat plate is generally three
Published on: November 9, 2020 Number of hits: 5937
-
Mechanical seal failures are generally known by people after abnormal leakage, abnormal wear, abnormal torque and other phenomena. The reasons for the failure are as follows: 1. The design and selection of mechanical seal are incorrect; 2. Poor mechanical seal quality; 3. The accuracy of the machine using or installing mechanical seals cannot meet the requirements; 4. Machine operation error
Published on: November 6, 2020 Number of hits: 63
-
Oil seal is a mechanical element for sealing, also known as rotary shaft lip seal ring. Oil seal is used to prevent the oil from leaking from the machinery to prevent oil entering the friction part of the machinery when the machinery is running. The common type is skeleton oil seal. 1、 Common representation of oil seal: oil seal type - inner diameter - outer diameter - height - material, such as TC40 * 62 * 12
Published on: November 5, 2020 Number of hits: 130
-
Discussion on common damage causes and maintenance of dry gas seal sealing weir prevents gas from flowing to the middle, so that the gas is compressed, causing pressure rise, and the seal end clearance is statically set to form the required gas film. The balance clearance (film thickness) of seal face is generally 2~10 μ M. In this way, the end clearance can control the opening force of the interface by itself, balance with the external closing force, and make the gas film
Published on: November 4, 2020 Number of hits: 163
-
Published on: September 30, 2020 Clicks: 52
-
1. What is the face specific pressure of mechanical seal? The remaining closing force per unit area on the seal ring is called end face specific pressure, expressed in Pa. Whether the end face specific pressure in MPa is appropriate has a great impact on the performance and service life of mechanical seals. If the specific pressure is too high, it will intensify the wear of the seal face, destroy the fluid film, and reduce the service life; If the specific pressure is too small, the seal will leak
Published on: August 11, 2020 Clicks: 1055
-
According to JB/T4127.1-1999 Technical Conditions for Mechanical Seals, the flatness of seal end face shall not be greater than 0.0009mm, and its surface must be smooth and clean. Due to different materials, the surface roughness (Ra) shall be less than 0.2 for metal or hard materials μ m. Non metallic or soft material 0.4 μ m。 The reason why such high flatness is required
Published on: August 11, 2020 Clicks: 749
-
The procedure of mechanical seal design is as follows: 1. Conduct thorough investigation and research. Specific design conditions of Dide. The specific contents include: the type of the working host, the parts to be sealed, the operating conditions, etc., namely, the medium pressure, the medium temperature, the shaft speed, and the steering direction; Name, composition and property of the sealed medium, including density, temperature, concentration, saturated vapor pressure, pH value
Published on: July 30, 2020 Clicks: 110
-
Mechanical seal, also known as end face seal, is a device used to solve the sealing between rotating shaft and engine body. It is a device to prevent fluid leakage, which is composed of at least one pair of fluid pressures at the end faces perpendicular to the rotating axis and the elastic force (or magnetic force) of the compensation mechanism, and the auxiliary seal to keep the joint and relative sliding, and is commonly used in rotary pumps, compressors, reaction agitators, etc
Published on: May 14, 2020 Clicks: 186
-
The utility model relates to the technical field of mechanical seal devices, in particular to a mechanical seal for a dry running kettle. Background technology: Kettle mechanical seal is an ideal way to solve the problem of mixing shaft seal. According to the logarithm of sealing surface, there are single end mechanical seal and double end mechanical seal. Double end mechanical seal is generally equipped with a balanced circulation system, which can be used in flammable, explosive, toxic, corrosive, high-tech
Published on: October 26, 2019 Clicks: 126
28 in total
15 entries per page
Page: 1/2
