An air compressor is a device used to compress gas. The structure of air compressor and water pump is similar. Most air compressors are reciprocating piston type, rotating blades or rotating screws. Centrifugal compressors are very large applications
development of
The data of "Analysis Report on Production and Sales Demand Forecast and Transformation and Upgrading of China's Air Compressor Industry" released by the Foresight Industry Research Institute shows that the market size of China's air compressor industry has increased by more than 8%, and the growth rate from 2010 to 2011 even Over 28%, the market is expanding rapidly. However, in such a huge market, foreign companies have controlled most of the market for a long time. According to the data of Qianzhan.com, in 2009, there were nearly 400 manufacturing companies in China's air compressor industry, of which the number of domestic-funded enterprises was close to 90%, and the total sales revenue was about 6 billion yuan, accounting for 40% of the industry; the number of foreign-funded enterprises was close to 10%, the total sales revenue is about 9 billion yuan, accounting for 60% of the entire industry.
However, domestic-funded enterprises continue to strengthen technological innovation. Leading domestic-funded enterprises in the industry, such as Kaishan Co., Ltd., continue to forge ahead in technology, the company's product performance has reached the international level, and has achieved some gains in the high-end market dominated by foreign capital. With the continuous improvement of product performance and continuous upgrading of technology, the market share of domestic-funded enterprises has also increased year by year. Taking the screw air compressor as an example, from 2009 to 2011, the sales value of screw air compressors increased from 14,800 units to 32,800, with a compound annual growth rate of 48.87%, and the market share increased from 14.10% in 2009 to 19.40%; Increased from 0.08 million to 20,100 units, the market share increased from 0.80% to 11.90%, the development is very rapid.
Composition of structural oil circulation system
Before starting, first start the oil pump control system. After the oil pump control system starts, ensure that the lubricating components of the air compressor are well lubricated. At the same time, the oil pump control air compressor system can adjust the internal oil pressure and oil temperature through the built-in temperature control valve to meet System needs.
Folding water circulation system
The cooling water enters the intercooler of the air compressor through the pipeline to cool and cool the first-stage compressed exhaust gas, and then enters the aftercooler to cool the exhaust gas, and the other cooling water inlet pipe passes through the two sets of heat exchangers above the main motor Cooling the motor winding, there is also a way to cool the oil cooler.
Distribution System
The air compressor is a 2000kW high-voltage motor (10kV), which is started at full voltage. The control cabinet is indoor AC and metal armor draw-out switch equipment. The switch equipment is composed of a fixed cabinet and drawable parts, that is, a trolley. The purpose of control, protection and monitoring has the function of "five preventions".
Screen protection system
The central signaling device is divided into two kinds of accident signals and warning signals. The main task of the accident signal is to be able to send out an audible signal in time when the circuit breaker accidentally trips, and make the corresponding circuit breaker light position signal flash. The main task of the pre-announcement signal is to send out an audible signal instantaneously or delayed when the operating equipment is abnormal, and make the light plate display the content of the abnormal phenomenon.
Daily maintenance
1. Daily or before each operation:
(1) Drain of oil and gas barrels
(2) Check the oil level
(3) Preparation of peripheral equipment, such as water and electricity supply, opening compressor outlet, etc.
2. 500 hours of operation:
(1) Remove the air filter and clean it, and blow it clean from the inside out with low-pressure compressed air below 0.2MPa.
(2) The first oil change filter after using the new machine.
(3) Replace the coolant.
(4) Clean the filter element of the air filter cup;
(5) Clean the drain valve filter.
3. 1000 hours of operation:
(1) Check the action and moving parts of the intake valve, and add grease.
(2) Clean the air filter.
(3) Inspect the tightening bolts of the pipe joints and the screws of the tightening wire terminals.
4. 2000 hours or 6 months of operation
(1) Check the various pipelines
(2) Replace the air filter
(3) Replace the oil filter
(4) Replace the filter element of the air filter cup
(5) Replace the automatic drain valve filter
(6) Replenish the motor grease
5. 3000 hours of operation or one year:
(1) Check the intake valve operation and whether the valve plate is tight.
(2) Check all solenoid valves.
(3) Check whether each protection differential pressure switch operates normally.
(4) Replace the oil fine separator.
(5) Check the pressure maintenance valve.
(6) Clean the cooler and replace the â—‹ ring.
(7) Replace the air filter element and oil filter element.
(8) Check the action of the starter.
6. Every 6000 hours:
(1) Cleaning the coolant circuit system
(2) Replace the high-grade coolant of the screw air compressor (the replacement temperature of the exhaust temperature is below 85 degrees).
7. Within 1 year or 2 years:
(1) Replace the body bearings and oil seals, and adjust the clearance.
(2) Measure the motor insulation, which should be above 1MΩ.
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