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发明公开
CN105756575A 一种防疲劳损伤的抽油机光杆及安装方法 无效 - 驳回

一种防疲劳损伤的抽油机光杆及安装方法
摘要：
本发明公开了一种防疲劳损伤的抽油机光杆，包括光杆本体和光杆卡子，还包括套管，所述套管套设在光杆本体上，所述光杆卡子夹设在套管的外壁，所述套管的内径与光杆本体的外径相配合，利用套管的形状记忆功能，使得所述套管紧固在光杆本体上，所述套管的材质为记忆合金。本发明在光杆本体上套设套管，保护光杆本体不受光杆卡子的挤压损伤，提高了光杆本体的抗疲劳性能和使用寿命。
摘要（英）：

The invention discloses a fatigue damage prevention polish rod of an oil pumping unit. The fatigue damage prevention polish rod comprises a polish rod body and a polish rod clamp, as well as a casing, wherein the polish rod body is sleeved by the casing; the polish rod clamp is arranged on the outer wall of the casing in a clamping manner; the inner diameter of the casing is matched with the outer diameter of the polish rod body; by virtue of the shape memory function of the casing, the casing can be fixedly arranged on the polish rod body; the casing is made of a memory alloy. Due to the casing arranged on the polish rod body in a sleeving manner, the polish rod body can be prevented from extrusion damages caused by the polish rod clamp, the fatigue resistance of the polish rod body is improved, and the service life of the polish rod body is prolonged.

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