Performance improvement of the cylinder block - valve plate contact in axial piston machines

液压轴向活塞机的摩擦学接触是高应力轴承。流体静力、流体动力和固体接触效应的组合使用可以达到较长的使用寿命。为了更深入地了解这种接触的机制，在先前完成的项目中采用了一种综合方法研究方法。实验和模拟研究导致定性和定量结果，使接触内的影响评估成为可能。利用这些结果，提出的项目旨在提高摩擦学接触的性能和效率。此外，目前这种触点的高性能只能通过使用含铅材料来实现。硬-硬接触或表面涂层未成功实施。前一个项目的结果和方法可用于实现无铅触点。采用模拟与实验相结合的行之有效的研究方法将在拟议项目中继续进行。首先接触几何形状将被开发，在温度分布和热点形成方面具有优势。接下来的实验研究验证了仿真结果，证明了该方法的可行性。在接下来的步骤中，材料将被替换或涂覆，并进行进一步的实验。接触力学、材料、涂层、热量和负荷分布等领域的研究成果是本项目的重要课题。

Tribological contacts in hydraulic axial piston machines are highly stresses bearings. Combinations of hydrostatic, hydrodynamic and solid contact effects are used to reach long lifetimes. For a deeper understanding of the mechanisms in this contact, within the completed previous project a combined approach research approach was undertaken. Experimental and simulative research leads to qualitative and quantitative results, making an assessment of the effects within the contact possible.Utilizing these results, the proposed project aims at an increased performance and efficiency of the tribological contact. Furthermore the current high performance of this contact can only be reached by using leaded materials. A hard-hard contact or a surface coating has not been successfully implemented. Results and methods from the previous project can be used to implement a lead free contact.The proven method of a combined research, using simulation and experiment will be continued in the proposed project. At first contact geometries will be developed, having advantages in terms of temperature distribution and hot spot formation. The following experimental research validates the simulation results and shows the feasibility. In a following step the material will be substituted or coated and further experiments performed. Results in the fields of contact mechanics, materials, coatings, heat and load distribution are essential subjects in this proposed project.