A kind of variable pitch bearing root defect phased array detection device

Abstract

The application discloses a kind of variable pitch bearing root defects phased array detection devices, including variable pitch bearing, V-type wedge, phased array card and computer;V-type wedge is installed on the lower side of V-type wedge of variable pitch bearing, and the tooth flank of variable pitch bearing is attached to the cylindrical surface, and both sides of the top of V-type wedge are provided with phased array chip, and the phased array chip is connected with phased array card, and the phased array card is connected with computer, the device can improve the detection efficiency of variable pitch bearing root defects.

Description

Technical Field

[0001] This invention belongs to the field of nondestructive testing technology and relates to a phased array detection device for defects in the tooth root of a pitch bearing. Background Technology

[0002] Currently, the detection of defects in the tooth roots of pitch bearings is mostly carried out during wind power shutdowns by using ordinary A-type ultrasonic probes or phased array probes to scan the tooth side and tooth tip respectively. Each tooth needs to be scanned multiple times, resulting in low detection efficiency.

[0003] To improve the efficiency of detecting defects at the root of pitch bearings, it is necessary to develop a phased array detection device for pitch bearing tooth roots. This device can improve the detection efficiency of pitch bearing tooth roots and provide technical support for the safe operation of wind turbines. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a phased array detection device for pitch bearing tooth root defects, which can improve the detection efficiency of pitch bearing tooth root defects.

[0005] To achieve the above objectives, the pitch bearing tooth root defect phased array detection device of the present invention includes a pitch bearing, a V-wedge, a phased array card, and a computer.

[0006] The V-shaped wedge is installed on the pitch bearing. The lower side of the V-shaped wedge has a cylindrical structure, and the tooth side of the pitch bearing is in contact with the cylindrical surface. Phased array chips are provided on both sides of the top of the V-shaped wedge. The phased array chips are connected to the phased array card, and the phased array card is connected to the computer.

[0007] The wedge end cap covers the top opening of the V-shaped wedge.

[0008] The phased array chip is fixed by wedge end caps.

[0009] Both sides of the V-shaped wedge are equipped with wedge rollers, which are located on the pitch bearing.

[0010] The wedge roller is connected to the side of the V-shaped wedge by a side lug.

[0011] The phased array chip is connected to the phased array card via signal transmission lines.

[0012] The computer controls the phased array chip's transmission and reception, scanning method, and scanning angle through the phased array card.

[0013] The phased array chip emits a sound beam, which is refracted through the interface between the V-shaped wedge and the pitch bearing and enters the root of the pitch bearing teeth.

[0014] The present invention has the following beneficial effects:

[0015] In specific operation, the phased array detection device for pitch bearing tooth root defects described in this invention uses a V-shaped wedge to fit against the side surface of the pitch bearing tooth. A phased array chip is set on each side of the V-shaped wedge. By pushing the V-shaped wedge to move along the tooth side surface, both tooth roots can be detected simultaneously. The angle of the V-shaped wedge can be adjusted according to different pitch bearings, and the number and size of the phased array chips can be changed. A suitable fan-shaped scanning angle can be set, and all defects at both tooth roots can be detected in one scan, resulting in high detection efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Among them, 1 is the pitch bearing, 2 is the V-shaped wedge, 3 is the phased array chip, 4 is the wedge end cap, 5 is the phased array card, 6 is the computer, 7 is the signal transmission line, 8 is the wedge roller, and 9 is the sound beam. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion regarding the concepts disclosed in the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0019] The accompanying drawings show structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0020] refer to Figure 1 The phased array detection device for pitch bearing tooth root defects of the present invention includes a pitch bearing 1, a V-shaped wedge 2, a wedge end cap 4, a phased array card 5, a computer 6, and a signal transmission line 7.

[0021] V-shaped wedge 2 is mounted on pitch bearing 1, and the lower side of V-shaped wedge 2 is cylindrical. The tooth side of pitch bearing 1 is in contact with the cylindrical surface. Phased array chips 3 are provided on both sides of the top of V-shaped wedge 2. Wedge end cap 4 covers the top opening of V-shaped wedge 2. The phased array chips 3 are fixed by the wedge end cap 4. Side ears are provided on both sides of V-shaped wedge 2. Wedge rollers 8 are provided below the side ears. The wedge rollers 8 are located on pitch bearing 1. Phased array chips 3 are connected to phased array card 5 through signal transmission line 7. Phased array card 5 is connected to computer 6. Computer 6 controls the transmission and reception, scanning mode and scanning angle of phased array chips 3 through phased array card 5, and analyzes and judges the scanning results through computer 6.

[0022] According to different testing requirements, the size and quantity of phased array chips 3, the scanning method and scanning angle are set, and the testing begins. The phased array chips 3 emit a sound beam 9, which is refracted through the interface between the V-shaped wedge 2 and the pitch bearing 1 and enters the tooth root of the pitch bearing 1. By pushing the V-shaped wedge 2, the sound beam 9 continuously detects the defects at the tooth root of the pitch bearing 1 until the tooth root is completely detected. With the V-shaped wedge 2 design, the tooth roots of two teeth can be detected at one time, and the detection efficiency is high.

[0023] In addition, the V-shaped wedge 2 adopts a V-shaped shape design, and its lower side adopts a cylindrical surface design, which fits tightly with the tooth side of the pitch bearing 1. Two side ears are provided on the upper two sides of the V-shaped wedge 2 to facilitate the installation and removal of the V-shaped wedge 2. Two wedge rollers 8 are installed below the side ears to facilitate the movement of the V-shaped wedge 2 during inspection.

Claims

1. A phased array detection device for pitch bearing tooth root defects, characterized in that, Includes pitch bearing (1), V-shaped wedge (2), phased array card (5) and computer (6); The V-shaped wedge (2) is installed on the pitch bearing (1). The lower side of the V-shaped wedge (2) is a cylindrical structure, and the tooth side of the pitch bearing (1) is in contact with the cylindrical surface. The top two sides of the V-shaped wedge (2) are provided with phased array chips (3). The phased array chips (3) are connected to the phased array card (5), and the phased array card (5) is connected to the computer (6). The wedge end cap (4) covers the top opening of the V-shaped wedge (2); The phased array chip (3) is fixed by the wedge end cap (4); Both sides of the V-shaped wedge (2) are provided with wedge rollers (8), and the wedge rollers (8) are located on the pitch bearing (1); The phased array chip (3) emits a sound beam (9), which is refracted through the interface between the V-shaped wedge (2) and the pitch bearing (1) and enters the root of the pitch bearing (1). The wedge roller (8) and the side of the V-shaped wedge (2) are connected by side lugs; The phased array chip (3) is connected to the phased array card (5) via a signal transmission line (7); The computer (6) controls the transmission and reception, scanning method and scanning angle of the phased array chip (3) through the phased array card (5).

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