The bulk density of the powder metallurgy part and the oil content test method of the oil bearing must be treated first in the specification.
Method for measuring the density of water repellent treatment:
CNS, JIS: Dip the sample into the container, and the pressure in the container is less than 4Kpa at room temperature, and after 30 minutes, return to normal pressure, then take out the sample and attach it to the surface oil and gently wipe it off.
GB/T: Immerse the sample in hot oil at a temperature of 65 ± 5 ° C until no bubbles appear. After cooling to room temperature, remove the sample and gently wipe off the oil adhering to the surface.
ASTM, MPIF: Simple Impregnation: Immerse the sample in lubricating oil at a temperature of 82 ± 5 ° C for 4 hours, then cool to room temperature, remove the sample, and attach it to the surface oil and gently wipe it off.
Waterproof treatment method for measuring effective porosity and oil content:
CNS, JIS: Put the sample into the container, reduce the pressure inside the container to less than 4Kpa for 10 minutes, and inject the oil heated to 80 °C into the container, completely immersing the sample. Continue to maintain the state under this reduced pressure for 30 minutes, and then return to normal pressure. After the oil temperature returns to normal temperature, the sample is taken out and the oil adhering to the sample is gently wiped off. Remark: When the lubricating oil temperature is 50 °C, the dynamic viscosity is 29.1±5.0.
GB/T: Put the sample into the container, reduce the pressure inside the container to less than 4Kpa and keep it for 20 minutes, and then heat the oil to 90±5°C and inject it into the container to completely fill the sample. Continue to maintain the state under this reduced pressure for 30 minutes, then return to normal pressure. When the oil temperature returns to normal temperature, the sample is taken out and the oil adhering to the sample is gently wiped off.
ASTM, MPIF: vacuum impregnation method, the sample is immersed in the lubricating oil at room temperature, and the pressure of the container is reduced to less than 7Kpa for 30 minutes; then the container is pressurized to atmospheric pressure, and the sample is further immersed in the lubricating oil for 10 minutes. Then, after cooling to room temperature, gently wipe off the oil adhering to the surface.
Remarks: Lubricating oil temperature is 38 ° C, dynamic viscosity is 20 to 65 cSt
Bitcoin mining equipment is mainly highly specialized ASIC mill , The maximum computing power of a single miner is 110T/s( Ant S19Pro mill ), The scale of computing power of the whole network is 120EH/s above . Ethereum's mining equipment is mainly graphics card mining machine , Professional ASIC Mining machines are very few , On the one hand, it is because of the of Ethereum mining algorithm [ resist ASIC sex " Improved R & D efficiency ASIC The threshold of the miner , So how much do you know about the mainstream Ethereum mining machine ?
Ethereum mining algorithm has higher requirements for memory , The purpose of this design limits ASIC The use of chips in Ethereum mining . From the results , Most Ethereum mining machines are graphics card machines , This reflects the application of Ethereum mining algorithm ASIC Success on . From the absolute value of computational power scale , The computing power of Ethereum is about 200TH/s, The computing power of bitcoin is about 120EH/s, The latter is close to the former 60 ten thousandfold .
ASIC Mining machines have high computing power , Large power consumption , Like the latest ant S19Pro mill , Rated power consumption is 3250W, Need to consume... Every day 78 Degree electricity , According to the current currency price and 0.23 The electricity price in wet season is RMB , The proportion of electricity charge is 30.68%. Other older bitcoins ASIC mill , Like ants T17 series , The proportion of electricity charges generally exceeds 50%. by comparison , The power consumption of the graphics card miner is low , The proportion of electricity is also low . such as 5600XT8 Graphics card miner of card .
Ant S19-95T It adopts aluminum alloy profile electromechanical integrated design , Parallel four fan structure . According to the measured data , In line with and better than the official data .S19 The series is provided by TSMC 7nm chip , A new generation of customized chips with perfect whole machine architecture and high conversion rate APW12 Power Supply , Reduce power loss during conversion , Use more energy-saving , Greatly shorten the return cycle of the miner . In addition, the newly upgraded mining machine operation interface is also more humanized , Real time computing power . The average computing power and the operation of each chip are clear at a glance .
Shenma mining machine M30S-86T/88T/90T, Bit micro 2020 Launched in 2013 M30S Series of new mining machines , Announced that it would M30S The series is expanded to three 3X product . stay 3X In the new standard , Bit micro promises a one-year warranty for its series of products . This series of mining machines are provided by Samsung 8nm chip , Among them, god horse M30S series , The power consumption is 38J/T, Provide higher computing power , Lower power consumption and high stability.
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