A simple rigid coupling device for suspended semi submersible vertical turbine pump

A simple rigid coupling device for a suspended semi submersible vertical turbine pump, comprising an upper shaft, a lower shaft, an elastic retaining ring for the shaft, a coupling, and a coupling sleeve. The device is characterized in that the shaft end portion where the upper shaft (1) and the lower shaft (7) are connected is provided with an "I" - shaped groove (8), and the "I" - shaped groove is embedded with half of the Haff coupling (4). The coupling sleeve (5) is fitted with a key card at the connection between the upper shaft and the lower shaft (7), and the lower end of the coupling sleeve is clamped at the shaft step position of the lower shaft. The elastic retaining ring (2) is installed in the retaining ring groove of the upper shaft; Compared with existing technologies, this technical method has a novel structure, is easy to use, safe and reliable, and has a small volume. It can achieve rigid connection between shafts, and is easy to assemble and disassemble without the need for special tools. This technical method is simple and the rigid coupling device is an axisymmetric structure, and the operation of the shaft system will not produce additional dynamic unbalance. In addition, this technical method is simple to manufacture, low in cost, and worthy of promotion and application.

Technical requirements: A simple rigid coupling device, comprising an upper shaft (1), a lower shaft (7), a shaft elastic retaining ring (2), a coupling (4), and a coupling sleeve (5). The lower end surface of the upper shaft (1) is connected to the upper end surface of the lower shaft (7), and the two shafts are located on the same axis. Its feature is that the shaft end parts where the upper shaft (1) and the lower shaft (7) are connected are both equipped with "I" grooves (8), and the "I" grooves are embedded with two halves of the Haff coupling (4). The coupling sleeve (5) is clamped by keys (3, 6) at the part where the upper shaft (1) and the lower shaft (7) are connected. The lower end of the shaft sleeve (5) is clamped at the shaft step position of the lower shaft (7), and the upper end of the coupling shaft sleeve (5) is connected to the elastic retaining ring (2), which is installed in the retaining ring groove of the upper shaft (1).