We estimate deformations or gaps occurring at all the ideally form-closed contacts, that separate the chambers, in epitrochoid (cycloidal class) generated star-ring gears of ORBIT^® motors. The direct measurement of these deformations and gaps is not an easy task as the contact positions are inaccessible for installing any measuring device. Therefore, we target the accurate theoretical estimation of these deformations and gaps for any pressure or torque load. The problem poses statically indeterminate, as there are multiple contacts. We use FEM in Ansys^® environment to model the problem and its solution. We develop the model to its final stage with gradual improvement in assessing more accurate and realistic boundary conditions as well as loading patterns. We make an elaborate presentation of this process in this investigation report. Interestingly, in ORBIT motor momentary occurrence of gap at the transition active contact, i.e., the contact separating the two adjacent chambers with one in high pressure and the other in low pressure, is unavoidable. This occurs for a substantial period of a power cycle and sometimes in both transition contacts, that separate the overall high pressure zone and the low pressure zone. The inter-chamber leakages through these gaps are partially responsible for lowering the volumetric efficiency. The present investigation is limited to establishing a method of estimating deformation and gaps at the active contacts of such units. Our proposed method can be used for any such unit of any geometric design data and kinematic model.

我们估计处出现的所有理想形状闭触点，该分离室，在外旋轮线轨道（摆线类）生成的星型圈齿轮的变形或间隙^®电机。直接测量这些变形和间隙并不是一件容易的事，因为安装任何测量设备都无法接触到接触位置。因此，我们的目标是对任何压力或扭矩负载下这些变形和间隙的准确理论估计。由于存在多个联系人，因此该问题导致静态不确定。我们使用有限元Ansys中^®建模问题及其解决方案的环境。我们将模型开发到最后阶段，并逐步进行评估，以评估更准确和现实的边界条件以及加载模式。我们在本调查报告中详细介绍了此过程。有趣的是，在ORBIT电机中，在过渡主动触点上，即在一个高压状态下将两个相邻腔室分开，另一个低压状态下，将两个相邻腔室分开的触点的瞬间出现间隙是不可避免的。这在功率周期的相当长的一段时间内发生，有时在两个过渡触点中发生，这两个过渡触点将整个高压区和低压区分开。通过这些间隙的腔间泄漏部分地导致了容积效率的降低。本研究仅限于建立一种估计这种单元的活动触点处的变形和间隙的方法。我们提出的方法可用于任何几何设计数据和运动学模型的任何此类单位。