在食品装备学院培养计划专业核心课课程安排中，会有《机械设计基础》这门机械大类所有学生都会上的基础课。该门课包含机械原理和机械设计基础，以及相关实验课程。

    在这门课里，会接触到各类机械零部件，其中就包含人字形齿轮。斜齿轮有对轴上的横向力，为消除这种力，把一个齿轮作成对称方向相反的斜齿轮，来消除这种力，看上去像个人字，简称为人字形齿轮。（英：Herringbone gear； 德： Pfeilverzahnung）

                          

斜齿轮

                

人字形齿轮（图片来源：百度）

A herringbone gear, a specific type of double helical gears, is a special type of gear that is a side to side (not face to face) combination of two helical gears of opposite hands. From the top, each helical groove of this gear looks like the letter V, and many together form a herringbone pattern (resembling the bones of a fish such as a herring). Unlike helical gears, herringbone gears do not produce an additional axial load.

Like helical gears, they have the advantage of transferring power smoothly because more than two teeth will be in mesh at any moment in time. Their advantage over the helical gears is that the side-thrust of one half is balanced by that of the other half. This means that herringbone gears can be used in torque gearboxes without requiring a substantial thrust bearing. Because of this herringbone gears were an important step in the introduction of the steam turbine to marine propulsion.

Precision herringbone gears are more difficult to manufacture than equivalent spur or helical gears and consequently are more expensive. They are used in heavy machinery.（资料来源：Wikipedia 维基百科）

机械学生需掌握词汇：

Herringbone gear:人字齿轮， helical gear: 斜齿轮，spur:直齿轮， herring:鲱鱼， mesh:啮合，torque：转矩，steam turbine:蒸汽涡轮发动机，marine propulsion船舶推进装置

 

   人字齿轮，因啮合能消除轴向的位移和受力，减少轴承的损坏，故多用于大动力机器。因其具有承载能力高、工作平稳等优点，在舰船传动中被大量采用。

 

人字齿轮箱故障模拟实验台由研究所自主设计，加工模拟人字齿轮故障，获取故障信息并与正常人字齿轮数据对比，研究人字齿轮和动压轴承故障的变速、变载、多故障测试与诊断。

                           

食品装备专业实验室人字齿轮箱故障模拟试验台