Tunnel drilling machine and hydraulic power head device thereof

Abstract

The invention discloses a tunnel drilling machine and a hydraulic power head device thereof. The hydraulic power head device is used for pushing a drill rod of the tunnel drilling machine, wherein a cylinder body of a hydraulic oil cylinder of the hydraulic power head device is fixedly connected with a power head main body; the cylinder body, the power head main body and a main shaft form a hydraulic oil cavity; the cylinder body is provided with a first oil liquid channel and a second oil liquid channel; a piston of the hydraulic oil cylinder is arranged inside the hydraulic oil cavity and is provided with a bulge; the bulge, the cylinder body and the power head main body form a first oil cavity and a second oil cavity; the first oil liquid channel is communicated with the first oil cavity; and the second oil liquid channel is communicated with the second oil cavity. When a slip bowl acts on a slip, hydraulic pressure compensation is applied to the hydraulic oil cylinder except that the main shaft acts on the slip bowl, so that the slip clamps or loosens the drill rod through a more flexible response, and the tunnel drilling machine has higher working efficiency. Simultaneously, the hydraulic oil cavity surrounds the main shaft, and the oil supply or the oil leakage of the hydraulic oil cavity is kept synchronous with each other, so that the possibility of unbalance loading of the main shaft is greatly reduced, and the safe and reliable properties of a hydraulic power head are improved.

Description

technical field [0001] The invention relates to the technical field of tunnel drilling machines, in particular to a hydraulic power head device for tunnel drilling machines. In addition, the present invention also relates to a tunnel drilling machine comprising the above-mentioned hydraulic power head device. Background technique [0002] The hydraulic power head device is an important part of the fixed tunnel drilling rig, which is mainly used to clamp the drill pipe of the tunnel drilling rig and drive it to rotate. At present, the power head of the full hydraulic drilling rig adopts a hydraulic motor as the power source, and drives the main shaft and the chuck to perform drilling after being decelerated by the reduction box. [0003] Commonly used chucks have the following forms: 1. Spring force clamping, hydraulic pressure release (normally closed); 2. Hydraulic pressure clamping, spring force release (normally open); 3. Hydraulic pressure clamping , the hydraulic pres...

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Problems solved by technology

[0006] from figure 1 It can be seen from the figure that due to the existence of the external hydraulic cylinder 21, the installation space required for this chuck 23 is large, which is not conducive to the structural design of the power head, and has a great impact on the drilling effect of the tunnel drilling rig; at the same time, due to the two The hydraulic cylinders 21 are symmetrically installed on both sides of the main shaft 24. During operation, the synchronization of the two hydraulic cylinders 21 is highly required. Once the load is unbalanced, the bearings will be damaged and the chuck will fail. It is difficult to guarantee the safety and reliability of the tunnel drilling rig.

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