large gear

The existing research on the subdivision machining of large gear is mainly aimed at large cylindrical gear. Niu Yanfang and

Steel casting defects are common. Large gears are steel castings in terms of material, and various defects often appear. Before

The method of electric arc furnace primary smelting + LF refining is adopted for liquid steel smelting. In order to

Large gear is the core transmission part of mining mill, and its reliability is related to the safety and stability

The involute profile is involute, and the helical profile is involute. From the perspective of engineering, in order to understand

Based on the general guiding ideology and on the basis of fully considering the characteristics and difficulties of the proposed

Based on the large wheel processing equipment (large gear hobbing machine), the precision measurement of large gears is studied. The

The main measurement methods of large gears are summarized. Based on the analysis, it is concluded that on-machine measurement has

The characteristics and measurement difficulties of large-size gears are analyzed, which can be divided into the following aspects: (1) Oversized

Generally, the gear whose parameters, size and weight are large enough to exceed the conventional conditions is called large gear.

The particularity of large gear and its measurement is analyzed in detail, and the principle and key technology of gear

The comprehensive measurement method and technology of large gears are still developed from the comprehensive measurement of medium and small

The side measuring instrument is positioned and installed on the machine tool (generally installed on the tool holder) to realize

Aiming at the limitations of desktop measuring instrument, the upper measuring instrument has a great change in the measurement idea.

Desktop instrument the desktop measuring instrument used for large gear measurement is basically the amplification of the desktop measuring instrument

Gear is famous for its complex shape all the time, and its various error inspection items are not only various,

Integral multistage centrifugal compressor is widely used in energy, air separation and chemical industry due to its compact structure, strong

In industry, the gear with diameter over 3000mm is called super large gear, which is the most widely used transmission

From the configuration principle, the accuracy characteristics of such machine tools can be obtained: ① The tooth profile error is

From the point of view of the purpose of designing super large modified gear (medium hard tooth surface and medium

According to the characteristics and cutting pattern of hobbing super large modified gear, the maximum wear of hob occurs at

It can be seen from practice that in hobbing large modulus multi tooth number gears, because of the large cutting

The principle of axial displacement method: (1) when the hob moves along the cutter bar, the thread of cutter teeth

Spray lubrication Large open gear adopts spray lubrication technology, which requires not only reasonable selection of lubricant but also reasonable

The working condition of large open gear is very bad. In order to meet the operation characteristics of open gear,

Since the main working conditions of open gear are heavy load and low speed, it is necessary for open gear

(1) Performance comparison of different base oils for open gear lubricants. (2) Characteristics of different types of lubricant base oils

(1) Asphalt based products. It is directly extracted from crude oil and contains extreme pressure additives and organic solvents. In

Failure mode of open gear The main failure modes of open gear are pitting corrosion, spalling, plastic deformation, gluing, broken