Generator set air brake thickness monitoring device and monitoring method

Abstract

The invention relates to the technical field of generator set maintenance, in particular to a generator set air brake thickness monitoring device and method, and the device comprises a PC terminal, a transmitter electrically connected with the PC terminal, and a monitoring structure electrically connected with the transmitter. The monitoring method comprises the following steps: S1, the PC end sends a detection instruction after receiving a unit braking signal and a unit rotating speed 0 signal; s2, after the transmitter receives the detection instruction, a sensor is started; s3, the optical sensor obtains a detection signal through reflection between the laser and the flashboard and transmits the detection signal to the transmitter; and S4, the transmitter converts the optical signal obtained by the sensor, stores and processes the optical signal, and transmits the optical signal to a PC terminal. The device has the beneficial effects that the defects of manual routing inspection can be overcome through online monitoring of the thickness of the brake air brake of the added unit, rapid and accurate measurement can be realized, timely measurement after shutdown can be realized by measuring the thickness of the air brake, and the production efficiency is improved. The operation efficiency and the safety of the hydro-generator are improved, and the maintenance cost and the downtime are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of generator set maintenance, and in particular to a generator set wind brake thickness monitoring device and a monitoring method. Background Art

[0002] The brake damper of a hydro-turbine generator set is a device used to brake the hydro-turbine generator. The brake ring of the unit rubs against the brake damper through air pressure, thereby achieving unit braking. During the operation, the brake damper has a large friction with the brake ring, causing the thickness of the gate to decrease due to wear. If it is not discovered and handled in time, it may cause the damper to fail and cause serious damage to the hydro-turbine generator.

[0003] The current monitoring of wind gate thickness of hydro-turbine generator sets mainly relies on manual inspections during every shutdown, which has the disadvantages of low efficiency, low accuracy, susceptibility to environmental influences, and cannot be monitored in real time. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a generator set wind brake thickness monitoring device, comprising:

[0006] A PC end, a transmitter electrically connected to the PC end, and a monitoring structure electrically connected to the transmitter.

[0007] As a preferred solution of the generator set wind damper thickness monitoring device of the present invention, the monitoring structure includes an L-shaped support plate, and a sensor is arranged on the top of the L-shaped support plate.

[0008] As a preferred solution of the generator set wind damper thickness monitoring device of the present invention, a positioning screw is arranged at the bottom of the L-shaped support plate, and a cable fixing hole is opened on the outer wall of the L-shaped support plate.

[0009] As a preferred solution of the generator set wind damper thickness monitoring device of the present invention, wherein: the positioning screw and the geometric center of the sensor are located on the same straight line in the vertical direction, and the number of the L-shaped support plates is four.

[0010] As a preferred solution of the generator set wind damper thickness monitoring device described in the present invention, the L-shaped support plate is arranged on the wind damper cylinder base through positioning screws, the L-shaped support plate arranged at the upper left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 25 mm away from the nearest longitudinal edge of the base, and the L-shaped support plate arranged at the lower right corner of the cylinder base is the same.

[0011] As a preferred solution of the generator set wind gate thickness monitoring device described in the present invention, the L-shaped support plate arranged at the lower left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 55 mm away from the nearest longitudinal edge of the base, and the L-shaped support plate arranged at the upper right corner of the cylinder base is the same.

[0012] As a preferred solution of the generator set wind brake thickness monitoring device described in the present invention, the sensor is an optical sensor.

[0013] As a preferred solution of the generator set wind gate thickness monitoring device of the present invention, the sensor is fixed 100 mm below the wind gate plate, and the measuring range is ±50 mm.

[0014] The present invention also discloses a method for monitoring the deviation of a wind brake of a generator set, which comprises any one of the wind brake thickness monitoring devices of a generator set according to claims 1 to 6, and further comprises:

[0015] S1: The PC receives the unit braking signal and sends a detection command after the unit speed is "0";

[0016] S2: The transmitter starts the sensor after receiving the detection command;

[0017] S3: The optical sensor uses the reflection between the laser and the gate to obtain the detection signal and transmit it to the transmitter;

[0018] S4: The transmitter converts the optical signal obtained by the sensor, stores it, processes it, and transmits it to the PC.

[0019] As a preferred solution of the method for monitoring the displacement of the wind gate of a generator set according to the present invention, the optical sensor obtains a detection signal by using the reflection between the laser and the gate plate and transmits the detection signal to the transmitter, including:

[0020] T1: The measuring light beam emitted by the sensor is received by the sensor after diffuse reflection by the wind gate, and the distance value between the wind gate and the sensor is obtained and transmitted to the computer;

[0021] T2: When the damper blade deviates, the angle of the diffuse reflected light received by the sensor changes.

[0022] The beneficial effects of the present invention are as follows: by installing online monitoring of the thickness of the unit brake wind gate, the shortcomings of manual inspection can be overcome, and fast and accurate measurement can be achieved. The wind gate thickness measurement can be achieved in time after shutdown, thereby improving the operating efficiency and safety of the turbine generator and reducing maintenance costs and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the monitoring structure in the present invention.

[0026] Figure 3 It is a schematic diagram of the installation position of the monitoring structure in the present invention on the wind gate base. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1, reference Figures 1 to 3 , which is the first embodiment of the present invention, provides a generator set wind brake thickness monitoring device, which includes a PC end 100, a transmitter 200 electrically connected to the PC end 100, and a monitoring structure 300 electrically connected to the transmitter 200.

[0031] Specifically, installing online monitoring of the thickness of the unit's brake damper can overcome the shortcomings of manual inspections and achieve fast and accurate measurements. The damper thickness measurement can also be measured in time after shutdown. The monitoring structure 300 is fixed to the damper base through a bracket. When the damper plate is offset, the monitoring structure 300 will calculate the offset value of the damper plate, thereby knowing the position of the damper in real time and performing replacement and maintenance in time.

[0032] Example 2, reference Figures 1 to 3, which is the second embodiment of the present invention, and is different from the previous embodiment in that, Figure 2 As shown, k-1 is the wind brake cylinder body, k-2 is the base of the wind brake cylinder body, k-3 is the wind brake plate, and the monitoring structure 300 includes an L-shaped support plate 301. A sensor 302 is arranged on the top of the L-shaped support plate 301, and a positioning screw 303 is arranged on the bottom of the L-shaped support plate 301. The positioning screw 303 fixes the L-shaped support plate 301 to the base of the wind brake cylinder body. A cable fixing hole 304 is opened on the outer wall of the L-shaped support plate 301. The cable fixing hole helps to fix the subsequent cable. The geometric center of the positioning screw 303 and the sensor 302 is located on the same straight line in the vertical direction. The number of L-shaped support plates 301 is four.

[0033] Further, the L-shaped support plate 301 is set on the damper cylinder base by means of positioning screws 303. The L-shaped support plate 301 set at the upper left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 25 mm away from the nearest vertical edge of the base. The L-shaped support plate 301 set at the lower right corner of the cylinder base is the same. The L-shaped support plate 301 set at the lower left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 55 mm away from the nearest vertical edge of the base. The L-shaped support plate 301 set at the upper right corner of the cylinder base is the same. Four optical sensor probes are set to monitor the damper offset at different points and at different times on a damper brake. All transmitters 200 need to be placed in the system cabinet and in the automation cabinet area.

[0034] Furthermore, sensor 302 is an optical sensor, which is fixed 100 mm below the wind gate plate, and has a measuring range of ±50 mm. The main function of the optical sensor is to emit a laser beam from a laser, which is collimated and incident on the surface of the object to be measured through an aperture, and then the surface of the object to be measured scatters or diffusely reflects the laser and converges it to the photosensitive surface of the detector.

[0035] Specifically, Figure 2 As shown in , the optical sensor is fixed on the wind gate base through a bracket, and two sensors 302 are installed on the inlet and outlet sides of the wind gate. The measuring light beam emitted by the sensor 302 is received by the sensor 302 after diffuse reflection by the wind gate plate. After being processed by the signal acquisition circuit, the distance value between the wind gate plate and the sensor 302 at this time is obtained and transmitted to the computer. When the wind gate plate is offset, the angle of the diffuse reflected light received in the sensor 302 changes, so that the light spot displacement in the detector changes. After being processed by the circuit, the distance between the wind gate plate and the sensor 302 after the offset is obtained, and the thickness of the wind gate plate (offset value) can be calculated.

[0036] Example 3, reference Figures 1 to 3, which is the third embodiment of the present invention, is different from the previous embodiment in that this embodiment provides a method for monitoring the displacement of a wind brake of a generator set, which includes the above-mentioned device for monitoring the thickness of a wind brake of a generator set, and further includes:

[0037] S1: The PC terminal 100 receives the unit braking signal and sends a detection instruction after the unit speed is "0";

[0038] S2: The transmitter 200 starts the sensor 302 after receiving the detection instruction;

[0039] S3: The optical sensor obtains a detection signal by using the reflection between the laser and the gate plate and transmits it to the transmitter 200;

[0040] S4: The transmitter 200 converts the optical signal obtained by the sensor 302, stores and processes it, and transmits it to the PC 100.

[0041] Furthermore, the optical sensor obtains a detection signal by using the reflection between the laser and the gate plate and transmits the detection signal to the transmitter 200, including:

[0042] T1: The measuring light beam emitted by the sensor 302 is received by the sensor 302 after diffuse reflection by the wind gate plate, and the distance value between the wind gate plate and the sensor 302 at this time is obtained and transmitted to the computer;

[0043] T2: When the damper plate is offset, the angle of the diffuse reflected light received by the sensor 302 changes.

[0044] Specifically, the online monitoring system for the thickness of the unit brake damper needs to perform measurement operations after receiving the unit brake signal and the unit speed is a "0" signal. The transmitter 200 realizes the conversion between the optical signal and the electrical signal on the photosensitive surface of the detector, and after storage and processing, it is transmitted to the PC terminal 100 through the RS232 / 485 port to complete the data exchange.

[0045] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0046] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0047] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A generator set wind brake thickness monitoring device, characterized in that: include, A PC end (100), a transmitter (200) electrically connected to the PC end (100), and a monitoring structure (300) electrically connected to the transmitter (200).

2. The generator set wind brake thickness monitoring device according to claim 1, characterized in that: The monitoring structure (300) comprises an L-shaped support plate (301), and a sensor (302) is arranged on the top of the L-shaped support plate (301).

3. The generator set wind brake thickness monitoring device according to claim 2, characterized in that: A positioning screw (303) is provided at the bottom of the L-shaped support plate (301), and a cable fixing hole (304) is provided on the outer wall of the L-shaped support plate (301).

4. The generator set wind brake thickness monitoring device according to claim 3, characterized in that: The geometric centers of the positioning screw (303) and the sensor (302) are located on the same straight line in the vertical direction, and the number of the L-shaped support plates (301) is four.

5. The generator set wind brake thickness monitoring device according to claim 4, characterized in that: The L-shaped support plate (301) is arranged on the damper cylinder base by means of positioning screws (303). The L-shaped support plate (301) arranged at the upper left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 25 mm away from the nearest vertical edge of the base. The L-shaped support plate (301) arranged at the lower right corner of the cylinder base is the same.

6. The generator set wind brake thickness monitoring device according to claim 5, characterized in that: The L-shaped support plate (301) arranged at the lower left corner of the cylinder base is 85 mm away from the nearest horizontal edge of the base and 55 mm away from the nearest vertical edge of the base. The L-shaped support plate (301) arranged at the upper right corner of the cylinder base is the same.

7. The generator set wind brake thickness monitoring device according to claim 6, characterized in that: The sensor (302) is an optical sensor.

8. The generator set wind brake thickness monitoring device according to claim 7, characterized in that: The sensor (302) is fixed 100 mm below the damper plate, and has a measurement range of ±50 mm.

9. A method for monitoring the wind brake deviation of a generator set, characterized in that: A generator set wind brake thickness monitoring device according to any one of claims 1 to 8, further comprising: S1: The PC (100) sends a detection command after receiving a braking signal of the unit and a signal indicating that the unit speed is "0"; S2: The transmitter (200) starts the sensor (302) after receiving the detection instruction; S3: The optical sensor obtains a detection signal by utilizing the reflection between the laser and the gate plate and transmits the detection signal to the transmitter (200); S4: The transmitter (200) converts the optical signal obtained by the sensor (302), stores it, processes it, and transmits it to the PC (100).

10. The method for monitoring the wind brake deviation of a generator set according to claim 9, characterized in that: The optical sensor uses the reflection between the laser and the gate plate to obtain the detection signal and transmits it to the transmitter (200), including: T1: the measuring light beam emitted by the sensor (302) is diffusely reflected by the wind gate plate and then received by the sensor (302), and the distance value between the wind gate plate and the sensor (302) at this time is obtained and transmitted to the computer; T2: When the damper plate is offset, the angle of the diffuse reflected light received by the sensor (302) changes.

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