Buffer element and power head buffer device with same

Abstract

The invention relates to a buffer element and a power head buffer device with same., The buffer element comprises an outer cylinder body assembly, an inner cylinder body assembly and a piston rod assembly, wherein the outer cylinder body assembly comprises an outer cylinder body used for being connected to an external device and bearing the inner cylinder body assembly and the piston rod assembly; the outer cylinder body is connected to an inner cylinder body of the inner cylinder body assembly in a sliding and sealing mode, the end part of the inner cylinder body is connected to an inner cylinder body end cover assembly, the inner cylinder body end cover assembly is connected to a piston rod of the piston rod assembly in a sliding and sealing mode, the piston rod is connected to an impact head, and the impact head is in clearance fit to the inner cylinder body; an inner cavity of the inner cylinder body is filled with elastic glue; the end part, exposed out of the outer cylinder body, of the inner cylinder body slides downwards in the outer cylinder body after being impacted by load, and meanwhile, the inner cylinder body end cover assembly is driven to slide downwards along the piston rod. The buffer element has excellent buffering and shock-absorbing effects, is more reliable in usability and is longer in service life.

Description

technical field [0001] The invention relates to the field of power buffering, in particular to a buffering element and a power head buffering device with the element. Background technique [0002] The working mode of the rotary drilling rig is often the rock-entry mode, and the power head is used as the power / torque output unit, which becomes one of the most direct shock points when the rock-entry mode is subjected to vibration. Therefore, the power head is equipped with a buffer The device is equipped with different numbers and types of springs and rubber buffer elements according to buffer requirements. However, due to limitations such as structural size, the rubber buffer element cannot fully satisfy the buffer performance and cannot absorb vibrations, so that the structural parts on the power head and the housing of the reducer often suffer from cracks and cracks due to vibrations. [0003] In order to solve the problem of insufficient cushioning capacity, in the prior ...

AI Technical Summary

Problems solved by technology

[0006] ①. There is no cement buffer element applied to the rotary drilling rig in the prior art;

[0007] ②. For the cement buffer element in the prior art, there is no dust-proof design on the upper end of the guide sleeve, which is easy to enter impurities such as sediment, which will cause problems such as sticking, transitional wear and even shaking of the cylinder;

[0008] ③. Oil pressure buffer components are prone to oil leakage: when subjected to high-frequency and small vibrations, the dynamic sealing performance of high-pressure oil is poor, and oil leakage is prone to occur; there is more muddy water in the working environment of rotary drilling rigs, which is likely to cause seal failure. Oil leakage due to early failure; when the oil pressure buffer element is subjected to overload impact, it is easy to damage the seal, resulting in oil leakage;

[0009] ④. Due to oil leakage and other similar problems of the oil pressure buffer element, the pressure drops, and eventually the guide rod cannot be ejected and the buffer fails;

[0010] ⑤. The sealing requirements of the oil pressure buffer element are high, which makes its manufacturing precision higher, which leads to an increase in cost

[0011] In view of this, the present invention provides a buffering element and a power head buffering device using cement for buffering, so as to solve the problems of insufficient shock-absorbing capacity and poor buffering effect of the buffering element on the rotary drilling rig, especially the rubber buffering element, and at the same time avoid Solved the problems of oil leakage in the oil pressure buffer element and the non-rebound of the guide rod, etc.

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