英语翻译The length-to-diameter ratio of a bushing is important.A

The length-to-diameter ratio of a bushing is important。 轴衬的长-径比很重要。Allowable bearing pressure per square inch of projected ared 。投影面积上每平方英寸容许承载压力The projected area is defined as the product of the length of the bearing and the nominal inside diameter。投影面积的定义为：轴承的长度和标称内径的乘积。Figure 7。 3 shows the L- and D-dimensions of a simple bearing of this type。图7。3为这类轴承的L（长度）和D（标称内径）尺寸规格The L/D ratio is seldom less than 1。 L/D比值很少小于1If it is too small,lubrication becomes a real problem。如果该比值太小,润滑就成为实际问题。If the ratio is greater than 4,there may be alignment problems and additional lubrication problems。 如果该比值大于4,就可能存在对中找正的问题,以及额外的润滑问题。In general,the most practical values for L/D ratio fall between 1 ½ and 2。总之,实际上最常见的L/D的比值处于1。5和2之间。Many "off-the-shelf" bushings are available in this range。许多轴衬的产品都符合这个范围。