1. How to increase the displacement of the compressor?
A: Increasing the displacement (gas volume) of the compressor is also to increase the output coefficient. The following methods are usually used:
(1). Correctly select the size of the clearance volume;
(2). Maintain the tightness of the piston ring:
(3). Maintain the tightness of gas cutting and stuffing boxes:
(4). Maintain sensitivity to inhalation and exhaust cutting;
(5). Reduce the resistance when the gas is inhaled;
(6). Dirty and colder gases should be inhaled;
(7). Maintain the tightness of the output pipeline, gas cutting, gas storage tank and cooler;
(8). Properly increase the speed of the compressor;
(9). Adopt advanced cooling system;
(10). Clean cylinders and other parts if necessary.
2. Why is the exhaust gas temperature limit in the compressor very strict?
Answer: For a compressor with lubricating oil, if the exhaust gas temperature is too high, the viscosity of the lubricating oil will decrease, and the performance of the lubricating oil will deteriorate; the light fraction in the lubricating oil will be quickly volatilized, and the "carbon deposit" will be caused. phenomenon. It has been proved that when the exhaust gas temperature exceeds 200 °C, the "carbon deposit" is quite serious, which can make the passage of the exhaust cutting seat and the spring seat (the cutting gear) and the exhaust pipe block, and increase the channel's negative force; "The piston ring can be stuck in the piston ring groove and lose the sealing effect; if the electrostatic action will also cause the "carbon deposit" to explode, the compressor water cooled by the power will not exceed 160 °C, and the air is cooled. Not more than 180 ° C.
3. What are the causes of cracks in the machine? How to check?
A: The common causes of cracks in mechanical parts are:
Breast enhancement mask host forum word of mouth to fine lines eye cream list eyeliner good eye cream recommended effective weight loss what food is good (1). Cooling water in the body cylinder head, did not release water in time after freezing in winter;
(2). Due to the internal stress generated during casting, it is gradually enlarged after vibration in use;
(3). Due to mechanical accidents, such as piston rupture, the connecting rod screw is broken, causing the connecting rod to break off, or the balance iron on the crankshaft flies out to damage the body or the parts in the gas cutting fall off the bad cylinder head.
The inspection methods are as follows:
(1). Infiltration of kerosene method: When inspecting, first wipe the body and cylinder head with a cotton yarn head soaked with kerosene, suspect that there is a crack, and then wipe it off with dry cotton yarn and kerosene, and immediately apply white powder. Where there is a crack, the kerosene will penetrate into the white powder, and the location and length of the crack will be clearly displayed.
(2). Water pressure method: The water pressure method is to check the crack location by increasing the pressure of the cooling water.
In repair shops with good equipment conditions, the water pressure check is carried out on a special equipment-hydraulic pressure tester. In units with poor equipment conditions, some use ordinary hand pressure pumps to change simple equipment. When checking, first try to block the water pipe joints of the body or cylinder head, and only connect one of the water pipe joints with the rubber hose outlet. The upper surface of the machine body should be made of a special cover of comparable size so that the cooling water cannot overflow. Then turn on the switch to press the water pump, and the room water enters the cooling water jacket. After the water is turned off, the switch is turned off, and the water pump is continuously pressed to stop the water supply when the pressure gauge pointer reaches 3-4 atmospheres.
At this time, you can carefully check the body, and there is no leakage or water seepage inside and outside the cylinder head.
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