Fixing and looseness-preventing device for ultrasonic sensor

Abstract

The utility model belongs to the field of industrial equipment state on-line monitoring, and particularly relates to an ultrasonic sensor fixing and locking device which comprises a locking nut, a spring, an ultrasonic sensor and a cap, the locking nut is connected to a measured bolt in a sleeving mode, and the ultrasonic sensor is arranged at the top of the measured bolt. The top of the ultrasonic sensor is connected with the spring, the spring and the ultrasonic sensor are sleeved with the cap, and the cap is fixed to the top end of the locking nut. The ultrasonic sensor fixing and locking device is composed of the locking nut, the cap and the spring, the locking nut is responsible for fixing the whole device and the ultrasonic sensor to a measured bolt, and the ultrasonic sensor does not loosen for a long time in a wind turbine generator environment.

Description

Technical Field

[0001] The present application belongs to the field of online monitoring of industrial equipment status, and specifically relates to a device for fixing and preventing loosening of ultrasonic sensors. Background Art

[0002] Wind turbines operate in complex natural environments, such as strong winds, temperature changes, humidity fluctuations, etc. These factors may affect the stress state of bolts. As a key connecting component of wind power equipment, the stress state of bolts is directly related to the stability and safety of the entire unit. Therefore, real-time online monitoring of bolt stress can timely detect abnormal bolt stress, avoid bolts breaking or loosening due to excessive stress, thereby causing unit failure, and ensure the safe and stable operation of the unit. At present, the use of real-time online monitoring technology of bolt stress based on ultrasonic principle has become the mainstream development trend. Among them, if the real-time online monitoring system of bolt stress based on ultrasonic principle wants to achieve long-term reliable and accurate monitoring of bolt stress, the reliability of ultrasonic sensor fixation is crucial. At the same time, with the continuous increase in the installed capacity of wind turbines, the monitored bolts are massive, and the fixing method of ultrasonic sensors must also meet the characteristics of simple, convenient and easy installation and disassembly.

[0003] Wind turbines will vibrate during operation, and traditional ultrasonic sensor fixing methods are not suitable for long-term reliable and accurate monitoring of bolt stress in a large number of wind turbines. For example, the glue bonding method cannot take into account both strong bonding and easy assembly and disassembly conditions, and it is not easy to reuse the sensor; under the vibration working environment, the threaded joint of the ordinary threaded fixing device will gradually loosen, and long-term reliable monitoring cannot be achieved. Summary of the invention

[0004] In order to overcome the above problems existing in the existing technology, an ultrasonic sensor fixing and anti-loosening device is now proposed, which can realize real-time online monitoring of the stress of massive wind power bolts and achieve long-term reliable and accurate measurement of stress.

[0005] To achieve the above technical effects, the solution of this application is as follows:

[0006] An ultrasonic sensor fixing and anti-loosening device comprises a locking nut, a spring, an ultrasonic sensor and a cap, wherein the locking nut is sleeved on a bolt to be tested, an ultrasonic sensor is arranged on the top of the bolt to be tested, the top of the ultrasonic sensor is connected to the spring, the spring and the ultrasonic sensor outer shell are connected with the cap, and the cap is fixed to the top end of the locking nut.

[0007] Furthermore, an ultrasonic coupling agent is provided between the ultrasonic sensor and the top end surface of the bolt to be measured.

[0008] Furthermore, the locking nut is provided with a longitudinal opening along the length direction, and the two sides of the longitudinal opening are respectively two vertical end faces of the locking nut, and locking screw holes are provided at the same height on the two vertical end faces, and locking screws are arranged in the locking screw holes.

[0009] Furthermore, an opening is provided on the outer surface of the locking nut, and the opening is connected to a locking screw hole of a vertical end face. After the locking screw enters from the opening, it passes through the locking screw hole of one vertical end face and the locking screw hole of another vertical end face corresponding to its position in sequence.

[0010] Furthermore, a connecting brim is provided at the bottom of the cap, a connecting hole is opened on the connecting brim, a screw hole is provided at the top end of the locking nut, and a clamping screw passes through the connecting hole and the screw hole in sequence to clamp the cap.

[0011] Furthermore, an opening is provided at the lower portion of the cap, and the opening vertically extends to a position where it is connected to the brim.

[0012] Furthermore, the top of the spring contacts the top of the inside of the cap.

[0013] Furthermore, the top of the locking nut is flush with the top of the bolt to be tested.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] 1. The ultrasonic sensor fixing and anti-loosening device of the present application is composed of a locking nut, a cap and a spring. The locking nut is responsible for fixing the entire device and the ultrasonic sensor on the bolt to be tested, and will not loosen for a long time in the wind turbine environment.

[0016] 2. The cap and spring of the present application work together to fix and compress the ultrasonic sensor, so that the sensor, under the action of the coupling agent, is tightly attached to the end face of the bolt to be measured, ensuring long-term reliable and effective fitting, and will not loosen during the long-term service of the unit. It can provide a constant clamping force to the ultrasonic sensor, maintain the stability of the thickness of the coupling agent, realize real-time online monitoring of wind power bolt stress, and realize long-term reliable and accurate measurement of stress.

[0017] 3. This application is convenient for assembly and disassembly, can be used for monitoring a large number of bolts, and can realize the reuse of sensors to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of this application.

[0019] Figure 2 This is a schematic diagram of the structure after the cap is removed for this application.

[0020] Figure 3This is a top view of this application.

[0021] Figure 4 for Figure 3 AA section view.

[0022] In the attached figure: 1-locking nut, 2-locking screw, 3-compression screw, 4-cap, 5-bolt to be tested, 6-ultrasonic sensor, 7-spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "upper", "vertical", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, an ultrasonic sensor fixing and anti-loosening device comprises a locking nut 1, a spring 7, an ultrasonic sensor 6 and a cap 4. The locking nut 1 is sleeved on the bolt 5 to be tested. The top of the bolt 5 to be tested is provided with an ultrasonic sensor 6. The top of the ultrasonic sensor 6 is connected to the spring 7. The cap 4 is connected to the outer sleeve of the spring 7 and the ultrasonic sensor 6. The cap 4 is fixed to the top of the locking nut 1. The ultrasonic sensor fixing and anti-loosening device of the present application is composed of a locking nut 1, a cap 4 and a spring 7. The locking nut 1 is responsible for fixing the entire device and the ultrasonic sensor 6 on the bolt 5 to be tested, and it will not loosen for a long time in the environment of a wind turbine.

[0030] The present application is to fix the ultrasonic sensor on the end face of the bolt to be measured, and to prevent the ultrasonic sensor from becoming loose with the long-term operation of the fan.

[0031] Example 2

[0032] like Figure 1 and Figure 2 As shown, an ultrasonic sensor fixing and anti-loosening device includes a locking nut 1, a spring 7, an ultrasonic sensor 6 and a cap 4, wherein the locking nut 1 is sleeved on the bolt 5 to be tested, an ultrasonic sensor 6 is arranged on the top of the bolt 5 to be tested, the top of the ultrasonic sensor 6 is connected to the spring 7, the cap 4 is sleeved on the spring 7 and the ultrasonic sensor 6, and the cap 4 is fixed on the top of the locking nut 1.

[0033] An ultrasonic coupling agent is provided between the ultrasonic sensor 6 and the top end surface of the detected bolt 5. The ultrasonic coupling agent used here is an ultrasonic coupling agent well known to those skilled in the art.

[0034] The locking nut 1 is provided with a longitudinal opening along the length direction, and the two sides of the longitudinal opening are respectively two vertical end faces of the locking nut 1, and locking screw holes are provided at the same height on the two vertical end faces, and the locking screw holes contain locking screws 2. The outer surface of the locking nut 1 is provided with an opening, and the opening is connected to the locking screw hole of one vertical end face. After the locking screw 2 enters from the opening, it passes through the locking screw hole of one vertical end face and the locking screw hole of the other vertical end face corresponding to the position thereof in sequence.

[0035] like Figure 3 and Figure 4 As shown, the bottom of the cap 4 is provided with a connecting brim, the connecting brim is provided with a connecting hole, the top end of the locking nut 1 is provided with a screw hole, and the clamping screw 3 passes through the connecting hole and the screw hole in sequence to clamp the cap 4. An opening is provided at the bottom of the cap 4, and the opening extends vertically to the connecting brim. The opening on the cap 4 is used for connecting the sensor signal line to the sensor.

[0036] The top of the spring 7 contacts the top of the inside of the cap 4. The top of the locking nut 1 is flush with the top of the bolt 5 to be tested.

[0037] The locking nut 1, the cap 4 and the spring 7 are composed of the locking nut 1, which is responsible for fixing the entire device and the ultrasonic sensor 6 on the bolt 5 to be measured, and does not loosen for a long time in the wind turbine environment. The cap 4 and the spring 7 work together to fix and compress the ultrasonic sensor 6, so that the sensor is closely attached to the end face of the bolt 5 to be measured under the action of the coupling agent, ensuring long-term reliable and effective adhesion, and realizing accurate and reliable measurement of bolt stress.

[0038] The locking nut 1 is screwed onto the bolt 5 to be measured until it is flush with the end face of the bolt 5 to be measured, and then the locking screw 2 is tightened to lock the locking nut 1 onto the bolt 5 to be measured, so as to prevent the locking nut 1 and the entire device from loosening due to factors such as vibration during the operation of the fan. Next, the ultrasonic sensor 6 is attached to the end face of the bolt 5 to be measured coated with coupling agent, and the spring 7 is placed on the ultrasonic sensor 6. The cap 4 is covered on the ultrasonic sensor 6 and the spring 7. The cap 4 is fixed to the locking nut 1 by the compression screw 3. The cap 4 acts on the spring 7 parallel to the spring axis to shrink the spring 7, thereby compressing the ultrasonic sensor 6. The spring 7 can always make the ultrasonic sensor 6 fit well on the end face of the bolt 5 to be measured during long-term real-time monitoring of bolt stress, thereby ensuring the reliability and accuracy of the measurement. The entire installation process is simple to operate and easy to disassemble.

[0039] By replacing springs of different specifications or adjusting the size of the internal cavity of the gland, adjusting the spring stiffness or maximum contraction of the spring 7, the pressure on the ultrasonic sensor 6 can be adjusted. By maintaining the same contraction of the spring 7, it is possible to ensure that the ultrasonic sensor 6 and the end face of the bolt 5 to be measured are under constant pressure each time the ultrasonic sensor 6 is installed, thereby maintaining almost the same coupling agent and reducing the measurement error introduced by the installation.

[0040] Under the action of the spring 7, the positive pressure between the threads of the locking nut 1 and the bolt 5 to be tested, as well as the threads of the clamping screw 3 and the locking nut 1 in the screwing area, can be increased, and the friction of relative rotation can be increased, which can further improve the anti-loosening performance of the entire device.

[0041] In addition, by adjusting the relative distance between the upper end face of the locking nut 1 and the end face of the bolt 5 to be measured, that is, the distance below the end face of the bolt 5 to be measured, the pressure of the cap 4 pressing the ultrasonic sensor 6 and the positive pressure between the threads of the threaded connection can be increased, which can further improve the anti-loosening property of the device and ensure the reliability and accuracy of the measurement.

[0042] The present application is to fix the ultrasonic sensor on the end face of the bolt to be measured, and to prevent the ultrasonic sensor from becoming loose with the long-term operation of the fan.

Claims

1. An ultrasonic sensor fixing and anti-loosening device, characterized in that: The invention comprises a locking nut (1), a spring (7), an ultrasonic sensor (6) and a cover cap (4); the locking nut (1) is sleeved on a bolt (5) to be tested; an ultrasonic sensor (6) is arranged on the top of the bolt (5) to be tested; the top of the ultrasonic sensor (6) is connected to the spring (7); the cover cap (4) is sleeved on the spring (7) and the ultrasonic sensor (6); and the cover cap (4) is fixed on the top of the locking nut (1).

2. The ultrasonic sensor fixing and anti-loosening device according to claim 1, characterized in that: An ultrasonic coupling agent is provided between the ultrasonic sensor (6) and the top end surface of the bolt (5) to be measured.

3. The ultrasonic sensor fixing and anti-loosening device according to claim 1, characterized in that: The locking nut (1) is provided with a longitudinal opening along its length, and the two sides of the longitudinal opening are respectively two vertical end faces of the locking nut (1), and locking screw holes are provided at the same height on the two vertical end faces, and locking screws (2) are contained in the locking screw holes.

4. The ultrasonic sensor fixing and anti-loosening device according to claim 3, characterized in that: The outer surface of the locking nut (1) is provided with an opening, the opening being in communication with a locking screw hole on a vertical end face, and the locking screw (2) enters through the opening and passes through the locking screw hole on a vertical end face and the locking screw hole on another vertical end face corresponding to the vertical end face in sequence.

5. The ultrasonic sensor fixing and anti-loosening device according to claim 1, characterized in that: The bottom of the cap (4) is provided with a connecting brim, the connecting brim is provided with a connecting hole, the top end of the locking nut (1) is provided with a screw hole, and the clamping screw (3) passes through the connecting hole and the screw hole in sequence to clamp the cap (4).

6. The ultrasonic sensor fixing and anti-loosening device according to claim 5, characterized in that: An opening is arranged at the lower part of the cap (4), and the opening vertically extends to a position where it is connected to the brim.

7. The ultrasonic sensor fixing and anti-loosening device according to claim 1, characterized in that: The top of the spring (7) contacts the top of the interior of the cover cap (4).

8. The ultrasonic sensor fixing and anti-loosening device according to claim 1, characterized in that: The top of the locking nut (1) is flush with the top of the bolt (5) to be tested.

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