[0017] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the embodiments of the present invention with reference to the accompanying drawings.
[0018] Please refer to Figure 1~3 The embodiment of the present invention provides a rotating cylindrical turbodrill self-driving speed sensor based on friction nanometer, which includes a casing 1, a cylinder 2, a drive shaft 3 and a circuit board.
[0019] Please refer to image 3 , The housing 1 includes an outer cylinder 11 and an inner cylinder 12, the inner cylinder 12 is placed inside the outer cylinder 11, and the two are coaxial, the outer cylinder 11 and the inner cylinder 12 pass a plurality of The ribs 13 are connected. In this embodiment, the number of ribs 13 is four. Four ribs 13 are evenly arranged around the inner cylinder 12, and the upper end of the inner cylinder 12 is higher than the upper end of the outer cylinder 11. The lower end of the inner cylinder 12 is lower than the lower end of the outer cylinder 11, the outer wall of the outer cylinder 11 is provided with an external thread that can be threadedly connected with the casing of the turbodrill, and the inner wall of the inner cylinder 12 is provided with an internal thread.
[0020] Please refer to figure 2 with 3 , The outer wall of the barrel 2 is provided with external threads, the outer wall of the barrel 2 is threadedly connected with the inner wall of the inner barrel 12, and the length of the barrel 2 is shorter than the outer barrel 11, and one end of the barrel 2 is connected to One end of the outer cylinder 11 is flush, and the other end extends into the inner cylinder 12. Both ends of the cylinder body 2 are provided with bearing grooves, and a bearing 6 is installed in each of the bearing grooves. The bearing 6 in this embodiment selects a sealed bearing. The inner wall of the cylinder 2 is provided with a plurality of convex arcs evenly arranged around its axis, and each of the convex arcs is bonded and fixed with a metal sheet 9 so that the inner wall of the cylinder 2 has any phase Avoid relative depression between the two adjacent metal sheets 9. In this embodiment, the number of the metal sheet 9 is three, and the metal sheet 9 is a copper foil sheet and has the same shape as the convex arc surface.
[0021] Please refer to figure 2 with 3 , The drive shaft 3 is a hollow shaft, the drive shaft 3 penetrates the cylinder 2, and there is a gap between the drive shaft 3 and the inner wall of the cylinder 2, and both ends of the drive shaft 3 are respectively sleeved in the Bearing 6, one end of the drive shaft 3 extends out of the cylinder 2 and the end is provided with a stepped end surface, the stepped end surface abuts the bearing 6, the other end of the drive shaft 3 extends into the cylinder 2 And this end is provided with a plug-in shaft 7, a circuit compartment 4 and a collector ring 5 are arranged outside the end, the circuit compartment 4 has a hollow shaft, the outer wall of the circuit compartment 4 is provided with external threads, and the outer wall of the circuit compartment 4 The inner wall of the inner cylinder 12 is threadedly connected. The collecting ring 5 is arranged in the inner hole of the circuit compartment 4 and fixed by bolts 8. The collecting ring 5 is provided with a mounting hole, and the plug shaft 7 is inserted into the mounting hole and fixedly connected by screws.
[0022] The outer wall of the drive shaft 3 is provided with a support block 14 which is arranged axially along the drive shaft 3, and a flexible friction material film 10 is adhered to the support block 14. The friction material film 10 is arranged around the driving shaft 3, and the friction material film 10 is arranged opposite to the metal sheet 9. Here, the width of the friction material film 10 is set to be smaller than the arc length between two adjacent metal sheets 9 to prevent the friction material film 10 from contacting the two metal sheets 9 at the same time during the rotation. In this embodiment, the nano material film 10 is a rectangular sheet-shaped polytetrafluoroethylene film, and the support block 14 is a kapton material block or a foam material block.
[0023] The circuit board is fixed in the circuit compartment 4, and the circuit board is respectively connected to all the metal sheets 9 and the friction material film 10 through wires. Two notches 15 are opened on the surface of the drive shaft 3, the friction material film 10 is fixed at one of the notches 15, the wire passes through the notches 15 and the collecting ring 5, and the collector The flow ring 5 and the notch 15 are used for laying wires to prevent the wires from being tangled. The friction material film 10 rubs against each of the metal sheets 9 to generate electrical energy to supply power to the circuit board. The circuit board can monitor the current generated by the friction material film 10 and each metal sheet 9 by friction. signal.
[0024] The self-driving speed sensor of a rotating cylindrical turbodrill based on friction nanometer of the present invention measures the rotating speed of the turbodrill. One end of the drive shaft 3 protruding from the housing 1 is connected to the rotating shaft of the turbodrill. The casing 1 is connected to the casing of the turbodrill, the rotation shaft drives the drive shaft 3 to rotate, the casing 1 and the cylinder 2 remain stationary, and the drive shaft 3 rotates the friction material film 10 It moves outwards under the action of centrifugal force, and when passing through each metal piece 9, it contacts the metal piece 9 and generates electricity by friction, generating a current signal, which is a waveform signal, which can be calculated according to the frequency of the waveform signal The frequency of frictional electricity generation. Since the friction material film 10 and each metal sheet 9 generate electricity by friction for each revolution of the turbodrill tool, the circuit board will detect three identical waveforms. The current signal can be used to calculate the rotational speed of the turbodrill.
[0025] In this article, the directional terms such as front, back, upper and lower are defined in terms of the position of the parts in the drawings and the positions between the parts in the drawings, just for the clarity and convenience of expressing the technical solution. It should be understood that the use of the location words should not limit the scope of protection claimed in this application.
[0026] In the case of no conflict, the above-mentioned embodiments and the features in the embodiments herein can be combined with each other.
[0027] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.
