Intelligent ring groove rivet monitoring system for wind power equipment

Abstract

The utility model discloses an intelligent ring groove rivet connection pair for wind power equipment and a monitoring system. The system comprises a signal acquisition mechanism and a signal processing and displaying mechanism, the signal processing and display mechanism comprises a signal transmission system, a signal receiving system and a signal display system; the ring groove rivet is composed of a rivet body, a special gasket and a lantern ring. The signal acquisition mechanism is composed of a strain gauge and a signal acquisition system connected by an acquisition line; the annular surface of the special gasket is provided with a notch arranged in the radial direction, a plurality of strain gauges are symmetrically bonded on the circumferential surface of the rivet polish rod, and acquisition lines of the strain gauges are led out through the notch of the special gasket to be in signal connection with a signal acquisition system. According to the system, a positioning groove does not need to be formed in a rivet rod through machining, a rivet cap is drilled, and a groove is formed in the bottom plane of the cap, so that the fatigue performance of the rivet is not affected; the special gasket is provided with a notch, so that the collection wire can be led out from the notch to avoid extrusion damage during installation; the system can realize remote on-line real-time monitoring of the mechanical property of the rivet and can give an alarm in real time.

Description

Technical Field

[0001] This utility model belongs to the field of riveting and fastening technology, and in particular to the field of ring groove rivet fastening design and monitoring technology. It relates to an intelligent ring groove rivet connection pair and monitoring system for wind power equipment that can be remotely monitored online in real time. Background Technology

[0002] Grooved rivets used in wind turbine equipment are frequently deployed in harsh environments and under difficult maintenance conditions. The reliability and safety of these rivet connections are crucial for the safe operation of wind turbines. While grooved rivets are widely used in wind turbines and effectively improve connection reliability, there is a lack of methods for real-time online monitoring of the mechanical properties of the installed grooved rivet connections. Currently, in some critical areas, axial force sensors are installed at the connection points to detect and read the mechanical properties of the grooved rivets. However, these axial force sensors typically use handheld devices or computers to read data, lacking the capability for remote real-time online monitoring. Furthermore, the large size of these axial force sensors can easily interfere with adjacent rivets and other wind turbine components at certain connection points, significantly limiting their installation and usability and hindering the testing of connection performance at critical points. Summary of the Invention

[0003] This invention discloses an intelligent grooved rivet connection pair and monitoring system for wind power equipment, addressing the shortcomings of existing technologies. The purpose of this invention is to provide an intelligent grooved rivet connection pair and monitoring system for wind power equipment that can be remotely monitored in real time. This technology enables remote online real-time monitoring of the mechanical properties of grooved rivets used in wind power equipment and provides alarm alerts for emergencies.

[0004] This utility model is achieved through the following technical solution:

[0005] A smart annular groove rivet monitoring system for wind power equipment is disclosed. The monitoring system includes a signal acquisition mechanism and a signal processing and display mechanism. The signal processing and display mechanism includes a signal transmission system, a signal receiving system, and a signal display system. The annular groove rivet is characterized by comprising a rivet, a special washer, and a collar. The signal acquisition mechanism includes strain gauges and a signal acquisition system connected to their signal acquisition lines. The annular surface of the special washer has radially arranged notches. Multiple strain gauges are symmetrically bonded to the circumferential surface of the rivet's smooth rod. The acquisition lines of each strain gauge are led out through the notches of the special washer and connected to the signal acquisition system.

[0006] Furthermore, the notch is a radial full notch that penetrates the special washer ring.

[0007] Another type of notch is a groove-shaped half-notch that is symmetrically arranged radially on the surface of the special washer ring and has a depth of less than two-thirds of the washer thickness.

[0008] Furthermore, at least two strain gauges are symmetrically bonded to the circumferential surface of the rivet rod.

[0009] This invention relates to an intelligent grooved rivet connector and monitoring system for wind power equipment. It enables remote online real-time monitoring of the mechanical properties of grooved rivets used in wind power equipment and provides alarm alerts for emergencies. This intelligent grooved rivet connector eliminates the need for machining positioning grooves at the rivet shank, drilling holes in the rivet head, or slotting the bottom plane of the rivet head, thus preserving the fatigue performance of the grooved rivet. The dedicated washer features a full notch or multiple partial notches, allowing the data acquisition line to be led out from the notch, preventing data acquisition failure due to compression during installation. The monitoring system includes a signal transmission system and a signal receiving system. Through the signal display system, it enables the observation of the mechanical properties of the intelligent grooved rivets installed on wind power equipment at any location and at any time. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the ring groove rivet monitoring system of this utility model;

[0011] Figure 2 This is a schematic diagram of the cross-section of the annular groove rivet with two sets of strain gauges;

[0012] Figure 3 This is a schematic diagram of the cross-section of the annular groove rivet with three sets of strain gauges;

[0013] Figure 4 This is a schematic diagram of the cross-section of the annular groove rivet with four sets of strain gauges;

[0014] Figure 5 This is a side view of the fully notched strain gauge of this utility model;

[0015] Figure 6 This is a front view of the fully notched strain gauge of this utility model;

[0016] Figure 7 This is a side view of the single half-notch strain gauge of this utility model;

[0017] Figures 8 to 11 These are frontal schematic diagrams of one to four notched strain gauges of this utility model.

[0018] In the diagram, 1 is a rivet, 2 is a special washer, 3 is a strain gauge, 4 is a collar, 5 is a signal acquisition system, 6 is a signal transmission system, 7 is a signal receiving system, 8 is a signal display system, 2.1 is a full notch, and 2.2 is a half notch. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0020] Refer to the attached diagram.

[0021] The intelligent annular groove rivet monitoring system for wind power equipment in this embodiment consists of an annular groove rivet connector, strain gauges, a signal acquisition system, a signal transmission system, a signal receiving system, and a signal display system.

[0022] The grooved rivet connection consists of three parts: rivet, special washer, and collar.

[0023] The smooth shank of the grooved rivet is where the strain gauge is bonded. Before bonding, it is only necessary to grind off the surface treatment layer of the smooth shank of the grooved rivet to expose the metal body of the rivet. There is no need to machine a positioning groove at the shank, which would cause stress defects at the shank and affect the fatigue life of the rivet.

[0024] The dedicated washer comes in two types: full-notch and half-notch. The purpose of the notch is to ensure that the acquisition line can be smoothly led from the rivet shank to the outside of the connection node and connected to the signal acquisition and processing system after the annular groove rivet is riveted. During riveting, the rivet head, connector, and collar are connected by axial compression, and the rivet is usually compressed radially without any clearance. By leading the acquisition line out through the radial notch of the dedicated washer, drilling holes in the rivet head and slotting the bottom plane of the rivet head can be avoided, thus maintaining the fatigue performance of the rivet. When connecting the acquisition line, the inner diameter of the dedicated washer is usually larger than the diameter of the annular groove rivet's shank, and the rivet hole of the connected part is also larger than the diameter of the annular groove rivet's shank. During installation, the strain gauge's acquisition line first passes through the gap between the rivet hole of the connected part and the annular groove rivet's shank, then through the gap between the inner hole of the washer and the annular groove rivet's shank, and finally through the full-notch or half-notch on the dedicated washer, leading the acquisition line from the annular groove rivet's shank inside the connection hole of the connected part to the outside of the connection node.

[0025] Two or more strain gauges are evenly bonded to the surface of the rod. When the force on the rivet changes, the deformation of the rivet will cause the length and cross-sectional area of ​​the strain gauge to change, thereby causing a change in the resistance value. The resistance change of the strain gauge is then transmitted to the signal acquisition and processing system through the acquisition line.

[0026] The signal acquisition system utilizes the Wheatstone bridge circuit principle to convert the resistance change of the strain gauge into a voltage signal. After amplification and processing, an electrical signal proportional to the strain is obtained, which is then transmitted to the signal transmission system via the acquisition line. The signal acquisition and processing system also has a storage function, capable of storing voltage and electrical signals for easy on-site data retrieval. Furthermore, the system is equipped with a direct connection port, allowing for on-site reading of mechanical performance data using a handheld reading device.

[0027] The signal transmission system uses Wi-Fi, ZigBee, and other transmission principles to modulate the electrical signal converted by the signal acquisition and processing system onto a carrier signal, and then radiates the signal into space through an antenna, facilitating online, remote, real-time monitoring of the mechanical properties of the grooved rivets. Simultaneously, the signal transmission system includes an alarm system that immediately sounds an alarm when the mechanical properties of the grooved rivets fall below standard requirements, allowing for timely handling of substandard products and ensuring the safe operation of wind power equipment. Furthermore, the signal transmission system is equipped with a modulator to improve signal anti-interference capabilities and increase transmission distance.

[0028] A signal receiving system captures electromagnetic wave signals in space and converts them into raw information. The system includes a demodulator to recover the carrier signal emitted by the signal transmission system.

[0029] The signal display system can be read by handheld devices or computers, converting the electrical signals restored by the signal receiving system into actual mechanical performance data of the ring groove rivets. This allows wind power equipment maintenance personnel to observe the mechanical performance of the intelligent ring groove rivets installed on wind power equipment anytime and anywhere.

[0030] The signal acquisition system and signal transmission system can be powered by their own power supply or by the power supply provided by the wind power equipment.

[0031] As shown in the figure, the intelligent ring groove rivet monitoring system for wind power equipment consists of multiple parts, including ring groove rivet 1, special washer 2, strain gauge 3, collar 4, signal acquisition and processing system 5, signal transmission system 6, signal receiving system 7, and signal display system 8.

[0032] Strain gauges 3 are evenly arranged on the rivet 1. The special washer 2 has two forms: a full notch 2.1 extending longitudinally through the washer ring, and a half notch 2.2 formed on the ring surface. When the special washer 2 with the half notch 2.2 is used, the strain gauges 3 are arranged in a matching configuration with the special washer 2, such as... Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown.

Claims

1. A smart ring groove rivet monitoring system for wind power equipment, the monitoring system comprising a signal acquisition mechanism and a signal processing and display mechanism; wherein, The signal processing and display mechanism includes a signal transmission system, a signal receiving system, and a signal display system; characterized in that: the annular groove rivet is composed of a rivet, a special washer, and a collar; the signal acquisition mechanism includes a strain gauge and a signal acquisition system connected to its signal acquisition lines; the annular surface of the special washer has radially arranged notches, multiple strain gauges are symmetrically bonded to the circumferential surface of the rivet rod, and the acquisition lines of each strain gauge are led out through the notches of the special washer and connected to the signal acquisition system.

2. The intelligent ring groove rivet monitoring system for wind power equipment according to claim 1, characterized in that: The notch is a radial full notch that passes through the special washer ring.

3. The intelligent ring groove rivet monitoring system for wind power equipment according to claim 1, characterized in that: The notch is a groove-shaped half-notch symmetrically arranged radially on the surface of the special washer ring, with a depth of less than two-thirds of the washer thickness.

4. The intelligent ring groove rivet monitoring system for wind power equipment according to claim 1, characterized in that: At least two strain gauges are symmetrically bonded to the circumferential surface of the rivet rod.

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