The steam turbine is a critical piece of equipment in thermal power generation, and its normal operation is directly linked to the operational status of the entire steam turbine generating unit. Power generation steam turbine unit When the turbine is in a hot state, the main shaft of the steam turbine expands and shifts axially and radially due to thermal effects, causing the coupling connecting it to the drive shaft of the main oil pump to twist and deform, eventually leading to damage and severely compromising the normal operation of the turbine. Currently, various connection methods between the turbine’s main shaft and the drive shaft have been developed to address the issue of short service life of the coupling assembly. However, all these technical solutions are designed solely to counteract the expansion and displacement of the turbine’s main shaft, with the aim of reducing vibration and torsional forces. They do not fundamentally accommodate the dynamic changes experienced by the turbine’s main shaft during operation, and thus their improvement effect remains limited.

　　The technician provides an improved... Power generation steam turbine unit The structure addresses the shortcomings of existing technologies by incorporating an arc-shaped gear plate that meshes with the transmission shaft, enabling it to actively adapt to axial and radial variations in the turbine’s main shaft. This completely eliminates rigid stresses imposed on the connection points, thereby extending the normal operating life of the power-generation turbine unit. To solve the aforementioned technical problems, the power-generation turbine unit adopts the following technical solution: an improved turbine unit structure comprising a turbine main shaft and a main oil pump transmission shaft. The turbine main shaft is equipped with an arc-shaped gear plate, while the main oil pump transmission shaft features an axial gear groove. The maximum height of the arc-shaped gear plate exceeds the depth of the gear groove. The initial engagement depth between the arc-shaped gear plate and the gear groove is set at half the depth of the gear groove. The top of the oil tank is provided with a raised upper edge. Radial and axial distance sensors are installed on the turbine main shaft, respectively monitoring the distances between the sensors and the side wall and the upper edge of the oil tank. Inside the cooler, a double-layer coil is installed; the inner layer of the double-layer coil carries oil, while the outer layer flows in the opposite direction, carrying cooling water. The sealing assembly includes two independent sealing rings that make separate sealed contacts with the oil tank, as well as a rotating shaft passing through the oil tank—this shaft can be either the turbine main shaft or the main oil pump transmission shaft. A metal spring clip is positioned between the two sealing rings.

　　The advantages of the aforementioned steam turbine generator set are as follows: This generator set has replaced the conventional coupling connection method with a gear-meshing connection. Regardless of whether the arc-shaped tooth plate moves axially or rotates axially within the gear groove, the contact area between the arc-shaped tooth plate and the gear groove remains constant. When the arc-shaped tooth plate undergoes radial movement, thanks to the clearance between the arc-shaped tooth plate and the gear groove, the meshing depth can vary accordingly with the radial motion without affecting the overall transmission system. This fully enables active adaptation to changes in the position of the turbine’s main shaft, eliminating rigid stresses and significantly extending the service life of the coupling. A distance sensor can monitor the displacement changes of the turbine’s main shaft in real time, allowing operators to promptly detect any abnormal conditions involving displacements exceeding the allowable limits. Due to the heat generated by gear transmission, this... Power generation steam turbine unit Equipped with an oil tank, it lubricates the gear components on one hand and absorbs heat on the other. The reverse-flow water-cooled double-layer coil boasts high cooling efficiency, helping to reduce fuel consumption and minimize equipment size. The metal spring clips can take advantage of changes in the axial and radial positions of the rotating shaft, thereby enhancing the sealing performance of the seals.