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942results about How to "Avoid strain" patented technology

Four-column forging hydraulic machine

InactiveCN102582101AAvoid strainMitigate strain damagePress ramEngineeringTraction injury
The invention relates to a four-column forging hydraulic machine which is composed of columns, an upper beam, a middle beam, a lower beam, a working oil cylinder and a return cylinder. A column guiding structure is arranged between the middle beam and the columns. The four-column forging hydraulic machine is characterized in that the column guiding structure comprises four groups of guiding assemblies composed of guiding plates and wedge plates, the wedge plates are pressed and fixed in the middle beam through pressing plates, supporting plates are arranged close to the upper ends of the guiding plates, adjusting pads are arranged between the supporting plates and the pressing plates, the lower end of a piston rod of the working oil cylinder is provided with a cylindrical cavity, the cylindrical cavity is internally provided with a first spherical pad and a spherical column, a supporting sleeve is sleeved outside the spherical column, a support structure is arranged at the upper part of a raised part at the lower end of the supporting sleeve, an elastic pad is arranged between the supporting structure and the raised part, and the lower end of the supporting sleeve is internally provided with a second spherical pad. According to the structure, the columns and the guiding structure are in surface contact, so that the local stress is reduced, and the traction injury of the columns is avoided. In addition, the second spherical pad, the spherical column and the first spherical pad are rotated in a matching way, therefore, the deflection of the piston rod along the axis is avoided, and the traction injury and the damage of the working oil cylinder and the piston rod are reduced.
Owner:TIANJIN TIANDUAN PRESS CO LTD

Disassembling method of wind turbine generator system main bearing with shaft sleeve

The invention discloses a disassembling method of a wind turbine generator system main bearing with a shaft sleeve. The disassembling method is mainly used for disassembling the main bearing from a main shaft. The disassembling method comprises the following steps: A. cooling the main shaft; B. heating a bearing inner race of the main bearing, and C. dissembling the main bearing from the tail end of the main shaft using match of a bearing tensioner and the main bearing under the effect of external force. A certain temperature difference is formed between the main shaft and the bearing inner race of the main bearing by cooling the main shaft and heating the bearing inner race of the main bearing, magnitude of interference of assembling of the main shaft is offset using the expansion caused by heat and contraction caused by cold theory, and the main bearing can be disassembled from the main shaft safely and quickly using the bearing tensioner. Integrality of disassembling of the main bearing is guaranteed, damages to the main shaft by using the bearing tensioner to disassemble the main bearing directly can be avoided, and recycle of the main shaft saves large cost for an enterprise. The disassembling method of the wind turbine generator system main bearing with the shaft sleeve is simple in operation procedures at the same time, and an ideal disassembling method of the wind turbine generator system main bearing with the shaft sleeve is achieved.
Owner:GUODIAN UNITED POWER TECH CHIFENG
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