This work investigated the temperature changes inside the bulk of lubricating greases under controlled high-shear stress conditions (250–500 s⁻¹). For this purpose, a newly developed temperature-measuring cell called Calidus was successfully tested. The temperature changes (ΔT) have been related to the greases’ components (thickener, base oil-type, and composition) and the structural degradation of the lubricating greases. Furthermore, a theoretical approach was proposed for calculating the internal temperature change of lubricating greases during shear stress. All greases showed an internal temperature profile characterised by a sudden rise in ΔT within the first 4 h from starting the test and subsequent ΔT decay until it reaches the steady state value. Furthermore, it was found that greases C1 and C5, formulated with lithium and calcium soap, respectively, with different soap content (16.1 wt% and 9.7 wt%, respectively), but the same base castor oil, showed the highest value of the maximum ΔT, c.a. 3.2 K, and the most drastic drop of ΔT. These greases showed both the highest specific densities and heat capacities. In addition, they showed the lowest ratio of expended energies (R_tee), which means more structural degradation in the stressed grease. On the contrary, the grease C3, with 13 wt% of Li-soap but the lowest base oil’s viscosity, showed the lowest maximum ΔT and the temperature profile was characterised by a moderate variation of ΔT along the test. The biogenic grease B3 developed a low-temperature change in the group of pure bio-genic greases close to grease C3.

^{这项工作研究了受控高剪切应力条件（250–500 s -1} ）下大部分润滑脂内部的温度变化。为此，成功测试了一种新开发的温度测量单元 Calidus。温度变化 (Δ T ) 与润滑脂的成分（增稠剂、基础油类型和成分）以及润滑脂的结构退化有关。此外，还提出了计算剪切应力期间润滑脂内部温度变化的理论方法。所有润滑脂均显示出内部温度分布，其特征是从测试开始后的前 4 小时内 ΔT 突然升高，随后 ΔT衰减直至达到稳态值。此外，还发现分别由锂皂和钙皂配制而成的润滑脂 C1 和 C5，皂含量不同（分别为 16.1 wt% 和 9.7 wt%），但使用相同的基础蓖麻油，显示出最大的最高值。 Δ T ，大约 3.2 K，并且 Δ T下降最剧烈。这些润滑脂表现出最高的比密度和热容量。此外，它们表现出最低的消耗能量比率（R _tee），这意味着受压润滑脂中的结构退化更多。相反，含有 13 wt% 锂皂但基础油粘度最低的润滑脂 C3 显示出最低的最大 Δ T，并且温度曲线的特征是在测试过程中Δ T的适度变化。生物润滑脂B3在纯生物润滑脂组中产生接近润滑脂C3的低温变化。