SKF Bearing 21317 E/C3

06/21/2020

Common faults and maintenance of air compressor

Common faults and maintenance of air compressor <img src="{{media url=&quot;Common_faults_and_maintenance_of_air_compressor.jpg&quot;}}" alt="" /> Common faults and maintenance of air compressor 　　 Air compressors are widely used in various industries with the development of technology, but no matter what type of air compressor, there will be some problems in the process of use. The following editors will now introduce some common faults and maintenance methods, let's take a look.

09/02/2022

The Working Principle of the Vacuum Contactor

The vacuum contactor uses the vacuum interrupter to extinguish the arc to frequently connect and cut off the normal working current.

06/29/2020

How the compressor works

08/21/2020

What is a shell and tube condenser How can the chiller save more power

Recently, some friends left a message to okmarts.com asking what is a shell and tube condenser? How to operate the chiller to save electricity? Today, the editor of okmarts.com will take you to learn more, and hope the following content can help you.

07/05/2020

Global Centrifugal Air Compressor Market Size, Analytical Overview, Growth Factors, Demand, Trends And Forecast To 2026

Global Commercial Refrigeration Compressors Market: Trends Estimates High Demand by 2027 The “Commercial Refrigeration Compressors Market” 2020 report includes the market strategy, market orientation, expert opinion and knowledgeable information.

09/21/2020

Working principle and usage method of motor bearing grease

Working principle and usage method of motor bearing grease The lubrication of the motor bearing relies on the lubricating oil that is precipitated when the three-dimensional fiber network structure in the grease is broken under the action of shear, forming a layer of lubricating film on the rotating elements of the bearing, the bearing seat and the bearing race for lubrication Effective.

06/14/2020

Refrigeration unit in artificial environment simulation laboratory

The artificial environment simulation laboratory can simulate the temperature and humidity environment, as well as the climatic environment of rainfall, snowfall, sunshine, wind, sand and dust.

01/18/2023

What is Variable Valve Timing?

VVT refers to variable valve timing. It adjusts the amount of intake (or exhaust), as well as the timing and angle of solenoid valves opening and closing according to the operating conditions of the engine.

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. 　　Here are two formulas involved: 　　①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. 　　② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. 　　 So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. 　　 Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 　　 2. Leakage 　　During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. 　　Why does the electric leakage cause the MCB to trip? There are two situations. 　　 ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. 　　②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. 　　How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. 　　 ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. 　　②Measure whether the output current exceeds the standard. 　　 So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.

08/25/2020

Cold pipe refrigeration system only half the power of the air conditioner

On August 19, according to foreign media reports, a new study from the Proceedings of the National Academy of Sciences demonstrated a new energy-saving refrigeration system that only needs half the electricity of the air conditioner.