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Analysis and Treatment of Mechanical Bearing Failures

Jan 17,2019

Analysis and Treatment of Mechanical Bearing Failures

1. Rolling Bearing Failure Analysis 1.1 Vibration Analysis of Rolling Bearings A typical way that rolling bearings fail is through pure fatigue spalling of the rolling contact. This type of spalling has a spalling surface area of about 2mm² and a depth of 0.2mm to 0.3mm, which can be detected by monitoring instruments to assess its vibration. Spalling may occur on the surface of the inner race, outer race, or rolling elements. Among these, the inner race is more prone to cracking due to higher contact stress. Among the various diagnostic techniques used for rolling bearings, vibration monitoring remains the primary method. Overall, time-domain analysis...

The application of external wall insulation and heat-insulating mortar in building energy efficiency.

Jan 17,2019

The application of external wall insulation and heat-insulating mortar in building energy efficiency.

According to the national industry standard "Energy-saving Design Standard for Residential Buildings in Hot Summer and Cold Winter Areas" (TGJ134-2001), residential buildings aim to achieve a 50% energy-saving goal by enhancing the thermal insulation performance of the building envelope and improving the energy efficiency ratio of heating and air conditioning equipment. This requires considering energy-saving measures for every part of the house, with the most important aspect being the enhancement of the thermal insulation performance of the envelope structure. The use of insulated plastering mortar is one of the economical, convenient, and quick construction methods. 1. Project Example The Yancheng Yuehu Huacheng residential community primarily consists of small high-rise buildings and is a high-end residential area, with a total construction area of 2.

A Brief Discussion on the Key Points of the Chloride Ion Content Determination Method in Cement

Jan 17,2019

A Brief Discussion on the Key Points of the Chloride Ion Content Determination Method in Cement

The sources of chloride ions in cement mainly come from raw materials, fuels, admixtures, and additives. Chloride ions in cement are an important factor in the corrosion of steel bars in concrete. Since rebar corrosion is one of the main forms of concrete damage, various countries have established corresponding regulations on the chloride ion content in cement. Therefore, the new standards for cement in our country have added the requirement that "the addition of grinding aids in cement production is allowed to be ≤0.5% and the chloride ion content in cement must be ≤0.06%", which fully reflects the cement industry's commitment and responsibility to ensure the quality of concrete. There are many methods for determining chloride ions, as outlined in GB/T176-2008 "Chemical Analysis of Cement."

Honor Promotion Certificate for Wall Panel Production Line

Jan 17,2019

Honor Promotion Certificate for Wall Panel Production Line

Warm congratulations to Shandong Innovation Building Materials Machinery Co., Ltd. for obtaining the promotion certificate for professional wall panel production lines and the honor of new technology and new product, awarded by the Provincial Construction Department on June 1, 2009!

Jan 17,2019

Roller chain drive technology knowledge

Mechanical transmission technology: input power of roller chain transmission, transmission ratio, small wheel speed, number of sprocket teeth, working conditions, number of sprockets, chain selection, recommended center distance, actual center distance, inclination angle of the centerline, wear coefficient, tooth-speed coefficient. Output geometric parameters of chain transmission, main geometric parameters of sprockets, results of strength calculations and related parameters. These parameters can also be input into AUTOCAD R14 through a plugin.

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