小編介紹了燃氣鍋爐的分類和液壓機的精度。
　　The classification of gas-fired boilers and the accuracy of hydraulic presses are introduced.
　　燃氣鍋爐按用途分類
　　Gas fired boilers are classified by use
　　1.工業(yè)燃氣蒸汽鍋爐：用于工業(yè)生產(chǎn)和供熱。 大多數(shù)是燃燒和熱效率低的低參數(shù)，小容量鍋爐。
　　Industrial gas steam boilers: for industrial production and heating. Most of them are low-parameter, small-capacity boilers with low combustion and thermal efficiency.
　　2.電站鍋爐：主要用于發(fā)電。 大多數(shù)是高參數(shù)，大容量鍋爐，燃燒室燃燒效率高。
　　2. Power plant boilers: mainly used for power generation. Most of them are high-parameter, large-capacity boilers with high combustion efficiency.
　　3.船舶鍋爐：用于船舶動力。 這種鍋爐一般為中低參數(shù)，燃料為燃料，要求體積小，重量輕，移動方便。
　　3. Marine Boiler: Used for Marine Power. This kind of boiler is generally of medium and low parameters, and the fuel is fuel. It requires small size, light weight and convenient movement.
　　4.機車鍋爐：主要用途是機車動力。 總體參數(shù)低，屬于小容量鍋爐，燃燒床燃燒，要求結(jié)構(gòu)緊湊且可移動。
　　4. Locomotive Boiler: The main use is locomotive power. The overall parameters are low, belonging to small capacity boilers, burning bed combustion, requires compact and movable structure.
　　2.燃氣蒸汽鍋爐根據(jù)工作流體的類型和輸出狀態(tài)進行分類，可以分為：
　　2. Gas-fired steam boilers are classified according to the type of workflow and output state, which can be divided into:
　　1.蒸汽鍋爐：出口的工作流體是蒸汽。
　　1. Steam Boiler: Steam is the working fluid for export.
　　2.熱水鍋爐：出口工作介質(zhì)為熱水。
　　2. Hot water boiler: the outlet medium is hot water.
　　3.特殊工作鍋爐：出口是特殊工作流體，例如某些有機物。
　　3. Special Working Boiler: The outlet is a special working fluid, such as some organic matter.
　　三臺燃氣蒸汽鍋爐可分為：根據(jù)出口工作壓力：
　　Three gas-fired steam boilers can be divided into: according to the outlet working pressure:
　　1.超高壓鍋爐：出口蒸汽壓力為14MPA（140kgf / cm）。
　　1. Ultra-high pressure boiler: outlet steam pressure is 14 MPA (140 kgf/cm).
　　2.高壓鍋爐：出口蒸汽壓力為10MPA（100kgf / cm）。

　　2. High pressure boiler: outlet steam pressure is 10MPA (100kgf/cm).
　　3.二次中壓鍋爐：出口工作壓力為2.5MPa。
　　3. Secondary medium pressure boiler: outlet working pressure is 2.5 MPa.
　　4.中壓鍋爐：出口蒸汽壓力為3.9 MPa（39 kgf / cm）。
　　4. Medium pressure boiler: outlet steam pressure is 3.9 MPa (39 kgf/cm).
　　5.超臨界壓力鍋爐：出口蒸汽壓力約為25 MPa（約250 kgf / cm）。
　　5. Supercritical pressure boiler: outlet steam pressure is about 25 MPa (about 250 kgf/cm).
　　6.亞臨界鍋爐：出口蒸汽壓力為17 MPa（170 kgf / cm？）。
　　6. Subcritical Boiler: The outlet steam pressure is 17 MPa (170 kgf/cm?).
　　7.低壓鍋爐：出口工作壓力（表壓）小于或等于1.3MPa（13kgf / cm）。
　　7. Low pressure boilers: the outlet working pressure (gauge pressure) is less than or equal to 1.3 MPa (13 kgf/cm).
　　液壓機的精度決定了零件的精度。 然而，僅使用靜態(tài)精度來測量印刷機的精度不是非常精確。 這是因為壓力機本身的機械強度對沖壓精度有很大的影響。 如果壓力機本身的強度低，則在達到?jīng)_壓壓力時，壓力機將變形。 因此，即使在靜態(tài)條件下很好地調(diào)節(jié)了上述條件，床的變形也可能由于強度的影響而引起。 發(fā)生了差異。 可以看出，壓力機的精度與強度有很大的關(guān)系，強度對沖壓工作有很大的影響。 因此，在高精度工件的沖壓生產(chǎn)和強連續(xù)性中，必須選擇精度。 更高，更剛性的壓力機。
　　The accuracy of hydraulic press determines the accuracy of parts. However, it is not very accurate to measure the accuracy of a printing press only by using static accuracy. This is because the mechanical strength of the press itself has a great impact on stamping accuracy. If the strength of the press itself is low, the press will deform when the stamping pressure is reached. Therefore, even if the above conditions are well adjusted under static conditions, the deformation of the bed may be caused by the influence of strength. Differences have taken place. It can be seen that the accuracy of the press has a great relationship with its strength, which has a great influence on the stamping work. Therefore, in the stamping production and strong continuity of high precision workpiece, precision must be chosen. A higher, more rigid press.