CN115045935B - Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator - Google Patents
Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator Download PDFInfo
- Publication number
- CN115045935B CN115045935B CN202210249403.4A CN202210249403A CN115045935B CN 115045935 B CN115045935 B CN 115045935B CN 202210249403 A CN202210249403 A CN 202210249403A CN 115045935 B CN115045935 B CN 115045935B
- Authority
- CN
- China
- Prior art keywords
- air brake
- wear
- air
- ultrasonic transducer
- brake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/028—Apparatus for indicating wear using electrical detection or indication means with non-electrical sensors or signal transmission, e.g. magnetic, optical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The wear detection method of the self-resetting air brake braking device of the large hydroelectric generator comprises the following steps of firstly, measuring initial parameters; step two, calculating the propagation velocity v of ultrasonic waves in the current temperature environment; step three, putting an air brake; step four, according to the TOF of the transit time detection method, the propagation time from the transmission to the reception of the ultrasonic wave is obtainedTAnd (5) obtaining the wear amount of the wear plate by a formula. The method has the advantages that the switching state of each air brake and the abrasion state of the abrasion plates of the mechanical brake system are judged by utilizing the ultrasonic ranging principle, the measurement quality is improved, the misjudgment rate is reduced, guidance is provided for quick on-site searching and confirmation of personnel, the air brake cylinder is connected through a single air pipe to conduct air brake switching control, and when the air brake is automatically reset to an initial state after the air brake is switched.
Description
Technical Field
The invention relates to the field of generator set control, in particular to a wear detection method of a self-resetting air brake braking device of a large hydroelectric generator.
Background
At present, after a large hydroelectric generating set starts to execute a shutdown process, mechanical braking is put into operation when the rotating speed of the set reaches 15% Ne, and a mechanical braking system is removed in a delayed mode after the whole set is stopped. If a certain air brake or a plurality of air brakes in the mechanical braking system are not normally put into, the abnormal air brake is not easy to find, the shutdown time of a unit at a low rotating speed is prolonged, the service lives of the bearing bush and the mirror plate are shortened, and even the abrasion of the bearing bush and the mirror plate can be possibly caused, if the air brake is not normally removed, the air brake body is required to be checked on site manually to find the air brake which does not fall down one by one, the space environment of a generator pit is complex, time and labor are wasted, and personal safety is also not facilitated.
At present, after a large hydroelectric generating set starts to execute a shutdown process, when the rotating speed of the set reaches 15% Ne, the piston is pushed by using industrial gas and drives a brake ring to be put in, so that the set stops rotating as soon as possible, the put-in and put-out state of mechanical brake is judged after signals fed back by a contact sensor arranged on each air brake are connected in series, in some hydropower plants, each air brake only adopts one position switch, when the air brake is removed, a flashboard falls down, the position switch acts, and when all the position switches act, logic judgment is made that the mechanical brake is removed; when the air brake is thrown, the flashboard is jacked up, the position switch returns, but only one position switch returns, and the logic judgment is carried out on the mechanical brake throwing.
The existing brake has the following defects: 1) The contact sensor has high false alarm rate due to the influence of the vibration of the generator and other reasons; 2) When mechanical brake is put in, only one position switch is operated, namely, brake input is judged, so when the brake is put in each time, if one or a plurality of air brakes are not normally put in, the monitoring system still displays that the mechanical brake is normally put in, abnormal air brakes cannot be exposed, and because the number of the input air brakes is reduced, the abrasion of the normally put air brakes is aggravated, the braking effect is poor, the downtime is prolonged, and the service lives of the bearing bush and the mirror plate are shortened, and even the abrasion of the bearing bush and the mirror plate is possibly caused; 3) Because the air brake and the brake ring are rubbed and braked for a long time, a large amount of abrasion is generated, and when the brake ring is worn seriously, the braking effect is weakened and the replacement is troublesome.
Disclosure of Invention
The invention aims to solve the technical problems of providing a self-resetting air brake braking device and a wear detection method for a large hydroelectric generator, which utilize an ultrasonic ranging principle to judge the throwing and retreating state of each air brake and the wear state of a wear plate of a mechanical braking system, improve the measurement quality, reduce the misjudgment rate, provide guidance for quick field searching and confirmation of personnel, and carry out air brake throwing and withdrawing control by connecting an air brake cylinder through a single air pipe, and automatically reset to an initial state after the air brake is withdrawn.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a large-scale hydroelectric generator self-resetting air brake arresting gear, including braking ring and air brake cylinder body, be equipped with the piston in the air brake cylinder body, the piston top is equipped with the antifriction plate base, antifriction plate base upper end is equipped with the antifriction plate, antifriction plate hardness is less than the braking ring, antifriction plate is equipped with reset spring along with the piston jack-up with braking ring contact production braking force between antifriction plate base tip and the antifriction plate base upper end, be equipped with ultrasonic transducer and temperature sensor on the air brake cylinder body outer wall, ultrasonic transducer upper end is just to antifriction plate base lower extreme face, the wearing and tearing volume of antifriction plate can be obtained through ultrasonic transducer upper end and antifriction plate base lower extreme's distance when detecting the braking, air brake cylinder body lower extreme is equipped with the drive pipe, through letting in compressed gas drive piston jack-up to the drive pipe and braking.
The ultrasonic transducer and the temperature sensor are connected with the local control unit, the local control unit is connected with the centralized control unit, and the centralized control unit is in communication connection with the HMI display screen.
The driving pipe is connected with the brake valve body, the brake valve body is a three-position four-way reversing valve, two ends of P, T of the brake valve body are respectively connected with an air inlet pipe and an air outlet pipe, a single-phase valve is connected to the air outlet pipe, a coil of the brake valve body is electrically connected with the control circuit, and compressed air is introduced into the air inlet pipe.
In the preferred scheme, the brake valve body is a three-position four-way reversing valve with a median function of O type.
The brake valve body coil comprises an air brake removing coil KM and an air brake throwing coil KM, and the control circuit comprises an on-site manual control circuit and a remote automatic control circuit;
the local manual control circuit comprises a local manual air brake removing button S2 and a local manual air brake throwing button S3, and is used for respectively controlling the air brake removing command relay K1 and the air brake throwing coil relay K2 to be connected;
the remote automatic control circuit comprises an auxiliary switch for remotely controlling the air brake removing relay K3 and an auxiliary switch for remotely controlling the air brake throwing relay K4, and the auxiliary switch is respectively connected with the local manual air brake removing button S2 and the local manual air brake throwing button S3 in parallel;
the normally open auxiliary switch of the air brake command relay K1 and the air brake coil relay K2 is respectively electrically connected with the air brake coil KM1 and the air brake coil KM2, and forms interlocking through the normally closed auxiliary switch of the air brake command relay K1 and the air brake coil relay K2, and forms self-locking through the normally open auxiliary switch of the air brake coil KM1 and the air brake coil KM 2.
In the preferred scheme, the air inlet pipe is connected with an air inlet electromagnetic valve, an overhauling air brake electromagnetic valve is connected between the driving pipe and the air inlet electromagnetic valve, and an overhauling air brake removing electromagnetic valve is connected between the driving pipe and the exhaust pipe.
In the preferred scheme, the top of the inner side of the air brake cylinder body is provided with a limit switch and a limiting block, and when abrasion of the abrasion-resistant plate reaches the limit, the piston triggers the limit switch when the air brake is put into operation.
The wear-resistant plate replacement reminding coil KM4 is arranged in the control circuit, the wear-resistant plate replacement reminding coil KM4 is electrically connected with the limit switch, and the wear-resistant plate replacement reminding coil KM4 auxiliary switch is connected with the wear-resistant plate replacement indicator lamp L3.
In a preferred scheme, an air inlet valve is arranged between the air brake cylinder body and the driving pipe.
The method for detecting the abrasion of the wear plate by using the self-resetting air brake braking device of the large hydroelectric generator comprises the following specific steps of:
measuring initial parameters, namely measuring initial thickness H before the wear plate is installed, and measuring vertical distance H between the lower end part of the wear plate base and the ultrasonic transducer after the wear plate is installed for the first time 0 ；
Step two, calculating the propagation speed v of ultrasonic waves in the current temperature environment, wherein when the temperature rises by 1 ℃, the propagation speed of the ultrasonic waves increases by 0.6M/s, and when the environment temperature at the installation position of the ultrasonic transducer is M ℃, the ultrasonic transducer comprises:
step three, putting an air brake;
step four, according to a TOF (time of flight) method, obtaining a formula of propagation time T of ultrasonic waves from transmitting to receiving, wherein the propagation path length of the ultrasonic waves from transmitting to receiving is l ', the vertical distance between the lower end part of a base of the wear plate and an ultrasonic transducer after a damper is put into is h', the abrasion loss of the wear plate is delta b, k is the distance between the center points of two probes of the ultrasonic transducer, mu is the error quantity, v 'is the ultrasonic speed at the current temperature, and m' is the installation environment temperature when the ultrasonic is started to measure, and the method comprises the following steps:
when h' and h 0 When the delta b is equal to mu, the wear plate is not worn, when the delta b is equal to H, the wear plate is completely worn, and when the delta b is negative, the air brake is not put in place, and the air brake needs to be checked.
According to the self-resetting air brake braking device and the abrasion detection method for the large hydroelectric generator, the bottom of the air brake cylinder is connected with the driving pipe, the driving pipe drives the piston to move through the control of the brake valve body to realize brake throwing and withdrawing, the brake valve body adopts the three-position four-way electromagnetic valve to realize pressure maintaining during brake throwing, the air brake cylinder can realize brake throwing and withdrawing only by connecting one pipeline, the pipeline connection is reduced, the failure rate is reduced, the control circuit can realize on-site manual control, remote automatic control and maintenance control in various control modes, the control requirements under various situations are met, the abrasion condition of the air brake can be known in real time and timely replaced through detecting the abrasion amount of the abrasion-resistant plate, and whether the air brake is thrown in place or not can be detected.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a block diagram of a single damper brake detection unit of the present invention;
FIG. 2 is an electrical schematic of a control circuit;
FIG. 3 is a diagram of the connection of air paths of a plurality of dampers;
FIG. 4 is a diagram of a preferred embodiment of a plurality of damper air paths;
FIG. 5 is a schematic diagram of the connection of the damper control system;
fig. 6 is a schematic diagram of the calculation of an ultrasonic transducer.
Wherein: brake ring 1, antifriction plate 2, air brake cylinder 3, piston 4, ultrasonic transducer 5, temperature sensor 6, antifriction plate base 7, reset spring 8, intake pipe 9, actuating tube 10, blast pipe 11, brake valve body 12, limit switch 13, stopper 14, air compressor 15, pressure maintaining tank 16, intake valve 17, local control unit 18, centralized control unit 19, HMI display 20, intake solenoid valve 21, maintenance air brake solenoid valve 22, maintenance air brake solenoid valve 23, transduction transmitting end probe 51, transduction receiving end probe 52, air brake coil KM1, air brake coil KM2, transducer starting coil KM3, antifriction plate replacement reminding coil KM4, local manual air brake button S2, local manual air brake button S3, air brake indicator L1, air brake indicator L2, antifriction plate replacement indicator L3.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the self-resetting air brake braking device of the large hydroelectric generator comprises a braking ring 1 and an air brake cylinder body 3, wherein a piston 4 is arranged in the air brake cylinder body 3, a wear plate base 7 is arranged at the top of the piston 4, a wear plate 2 is arranged at the upper end of the wear plate base 7, the hardness of the wear plate 2 is lower than that of the braking ring 1, the wear of the braking ring 1 can be prevented, a reset spring 8 is arranged between the end part of the wear plate base 7 and the upper end of the wear plate base 7 along with the jacking of the piston 4, an ultrasonic transducer 5 and a temperature sensor 6 are arranged on the outer wall of the air brake cylinder body 3, the upper end of the ultrasonic transducer 5 is against the lower end face of the wear plate base 7, the abrasion amount of the wear plate 2 can be obtained by detecting the distance between the upper end of the ultrasonic transducer 5 and the lower end of the wear plate base 7 through the ultrasonic transducer 5 during braking, a driving pipe 10 is arranged at the lower end of the air brake cylinder body 3, and the piston 4 is jacked by introducing compressed gas into the driving pipe 10 to jack for braking.
When compressed gas is introduced into the driving pipe 10, the gas pushes the piston 4 to move upwards until the wear plate 2 abuts against the brake ring 1, and when the driving pipe 10 discharges the compressed gas, the piston 4 is reset under the action of the pulling force of the reset spring 8 to perform brake release.
As shown in fig. 5, the above-mentioned ultrasonic transducer 5 and temperature sensor 6 are connected with the local control unit 18, the local control unit 18 is connected with the centralized control unit 19, the centralized control unit 19 is connected with the HMI display 20 in a communication manner, the local control unit 18 can detect the ambient temperature of the damper and receive the detection value of the ultrasonic transducer 5, and can transmit to the centralized control unit 19 for remote communication and control.
As shown in fig. 1, the driving pipe 10 is connected with a brake valve body 12, the brake valve body 12 is a three-position four-way reversing valve, two ends of P, T of the brake valve body 12 are respectively connected with an air inlet pipe 9 and an air outlet pipe 11, a single-phase valve is connected to the air outlet pipe 11, a coil of the brake valve body 12 is electrically connected with a control circuit, and compressed air is introduced into the air inlet pipe 9.
The control circuit is connected to the local control unit 18, and can perform local control or remote control through the centralized control unit 19.
As shown in fig. 3 and 4, the brake valve body 12 is a three-position four-way reversing valve with a median function of O type, and the three-position four-way reversing valve with an O type is pressure-maintaining in the middle position, and is respectively used for entering air and discharging air when coils at two sides are sucked.
As shown in fig. 2-4, the coil of the brake valve body 12 comprises a wind removal coil KM1 and a wind throwing coil KM2, and the control circuit comprises an on-site manual control circuit and a remote automatic control circuit;
the local manual control circuit comprises a local manual air brake removing button S2 and a local manual air brake throwing button S3, and is used for respectively controlling the air brake removing command relay K1 and the air brake throwing coil relay K2 to be connected;
the remote automatic control circuit comprises an auxiliary switch for remotely controlling the air brake removing relay K3 and an auxiliary switch for remotely controlling the air brake throwing relay K4, and the auxiliary switch is respectively connected with the local manual air brake removing button S2 and the local manual air brake throwing button S3 in parallel;
the normally open auxiliary switch of the air brake command relay K1 and the air brake coil relay K2 is respectively electrically connected with the air brake coil KM1 and the air brake coil KM2, and forms interlocking through the normally closed auxiliary switch of the air brake command relay K1 and the air brake coil relay K2, and forms self-locking through the normally open auxiliary switch of the air brake coil KM1 and the air brake coil KM 2.
The preferable scheme is as shown in fig. 4, the air inlet pipe 9 is connected with an air inlet electromagnetic valve 21, an overhaul air brake valve 22 is connected between the driving pipe 10 and the air inlet electromagnetic valve 21, and an overhaul air brake removing electromagnetic valve 23 is connected between the driving pipe 10 and the air outlet pipe 11.
The preferable scheme is as shown in fig. 1, the top of the inner side of the air brake cylinder body 3 is provided with a limit switch 13 and a limit block 14, and when the abrasion of the abrasion-resistant plate 2 reaches the limit, the piston 4 triggers the limit switch 13 when the air brake is thrown.
As shown in fig. 2, the above-mentioned control circuit is provided with a wear plate replacement reminding coil KM4, the wear plate replacement reminding coil KM4 is electrically connected with a limit switch 13, and an auxiliary switch of the wear plate replacement reminding coil KM4 is connected with a wear plate replacement indicator lamp L3.
In a preferred embodiment, as shown in fig. 3 and 4, an air intake valve 17 is provided between the damper cylinder 3 and the drive pipe 10.
As shown in fig. 6, a wear-resistant plate wear detection method using the self-resetting wind brake device of the large-scale hydroelectric generator comprises the following specific steps:
step one, initial parameter measurement, namely measuring the initial thickness H of the wear plate 2 before the wear plate 2 is installed, and measuring the vertical distance H between the lower end part of the wear plate base 7 and the ultrasonic transducer 5 after the wear plate 2 is installed for the first time 0 ；
Step two, calculating the propagation speed v of ultrasonic waves in the current temperature environment, wherein when the temperature rises by 1 ℃, the propagation speed of the ultrasonic waves increases by 0.6M/s, and when the environment temperature at the installation position of the ultrasonic transducer is M ℃, the ultrasonic transducer comprises:
step three, putting an air brake;
step four, according to a TOF (time of flight) method, a propagation time T formula of ultrasonic waves from transmitting to receiving is obtained, the propagation path length of the ultrasonic waves from transmitting to receiving is l ', the vertical distance between the lower end part of the wear plate base 7 and the ultrasonic transducer 5 after the air brake is put into is h', the abrasion loss of the wear plate 2 is delta b, k is the distance between the center points of the two probes of the ultrasonic transducer, mu is the error quantity, v 'is the ultrasonic speed at the current temperature, and m' is the installation environment temperature when the ultrasonic wave starts to be measured, and the following steps are:
when h' and h 0 When the values of Δb are equal to μ, no wear is generated on the wear plate 2, when Δb is equal to H, the wear plate 2 is completely worn, and when Δb is negative, it is indicated that the damper is not put in place and it is necessary to check.
The wear amount of the wear plate 2 and the brake-on/off state of the brake are known from the value of Δb.
As shown in FIG. 2, the voltage of the electric control loop of the air brake is selected to be +110V to-110V, when a section of direct current bus has a ground fault, the voltage difference can still be maintained at 220V, the reliability is improved, and three control modes are set for the switching control of the air brake, namely local manual control, remote automatic control and maintenance control;
in the local manual control mode, a local manual air brake removing button S2 and a local manual air brake throwing button S3 in the local control unit 18 respectively control the air brake removing command relay K1 and the air brake throwing coil relay K2 to be connected;
when the automatic control mode is a remote automatic control mode, an auxiliary switch for remotely controlling an air break relay K3 and an auxiliary switch for remotely controlling an air break relay K4 in the centralized control unit 19 are used for respectively controlling the air break command relay K1 and the air break coil relay K2 to be connected;
when the maintenance control mode is adopted, the operation steps of the air brake are that the maintenance air brake removing electromagnetic valve 23 is closed firstly, the air inlet electromagnetic valve 21 is closed again, and finally the maintenance air brake throwing electromagnetic valve 22 is opened, so that the purely manual air brake throwing is realized; the operation steps of the air brake are that the overhauling air brake solenoid valve 22 is closed firstly, the air inlet solenoid valve 21 is closed secondly, and the overhauling air brake solenoid valve 23 is opened finally.
Claims (4)
1. The abrasion detection method of the self-resetting air brake braking device of the large hydroelectric generator is characterized by comprising the following specific steps of:
measuring initial parameters, namely measuring initial thickness H of the wear plate (2) before the wear plate (2) is mounted, and measuring vertical distance H between the lower end part of the wear plate base (7) and the ultrasonic transducer (5) after the wear plate (2) is mounted for the first time 0 ；
Step two, calculating the propagation speed v of ultrasonic waves in the current temperature environment, wherein when the temperature rises by 1 ℃, the propagation speed of the ultrasonic waves increases by 0.6M/s, and when the environment temperature at the installation position of the ultrasonic transducer is M ℃, the ultrasonic transducer comprises:
step three, putting an air brake;
step four, according to a TOF (time of flight) detection method, a propagation time T formula of ultrasonic waves from transmitting to receiving is obtained, the propagation path length of the ultrasonic waves from transmitting to receiving is l ', the vertical distance between the lower end part of a wear plate base (7) and an ultrasonic transducer (5) after a damper is put into is h', the abrasion loss of the wear plate (2) is delta b, k is the distance between the center points of two probes of the ultrasonic transducer, mu is the error quantity, v 'is the ultrasonic speed at the current temperature, and m' is the installation environment temperature when the ultrasonic is started to measure, and the method comprises the following steps:
when h' and h 0 When the delta b is equal to mu, the wear plate (2) is not worn, when the delta b is equal to H, the wear plate (2) is completely worn, and when the delta b is negative, the air brake is not put in place and needs to be checked.
2. The abrasion detection method of the self-resetting air brake braking device of the large hydroelectric generator according to claim 1, wherein the self-resetting air brake braking device comprises a braking ring (1) and an air brake cylinder body (3), and is characterized in that a piston (4) is arranged in the air brake cylinder body (3), a wear-resistant plate base (7) is arranged at the top of the piston (4), a wear-resistant plate (2) is arranged at the upper end of the wear-resistant plate base (7), the hardness of the wear-resistant plate (2) is lower than that of the braking ring (1), a reset spring (8) is arranged between the end part of the wear-resistant plate base (7) and the upper end of the wear-resistant plate base (7) along with the jacking of the piston (4), an ultrasonic transducer (5) and a temperature sensor (6) are arranged on the outer wall of the air brake cylinder body (3), the lower end face of the ultrasonic transducer (5) is just opposite to the lower end face of the wear-resistant plate base (7), the distance between the upper end of the ultrasonic transducer (5) and the lower end of the wear-resistant plate base (7) can be obtained when the ultrasonic transducer (5) detects braking, the air brake cylinder body (3) is jacked by the aid of a compressed driving tube (10), and the air is jacked into the air cylinder body (4).
3. The abrasion detection method of the self-resetting air brake braking device of the large hydroelectric generator according to claim 2, wherein the ultrasonic transducer (5) and the temperature sensor (6) are connected with a local control unit (18), the local control unit (18) is connected with a centralized control unit (19), and the centralized control unit (19) is in communication connection with an HMI display screen (20).
4. The abrasion detection method of the self-resetting air brake braking device of the large hydroelectric generator according to claim 3, wherein the driving pipe (10) is connected with the braking valve body (12), the braking valve body (12) is a three-position four-way reversing valve, two ends P, T of the braking valve body (12) are respectively connected with the air inlet pipe (9) and the air outlet pipe (11), the air outlet pipe (11) is connected with a single-phase valve, a coil of the braking valve body (12) is electrically connected with the control circuit, and compressed air is introduced into the air inlet pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210249403.4A CN115045935B (en) | 2021-04-01 | 2021-04-01 | Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356148.9A CN113236694B (en) | 2021-04-01 | 2021-04-01 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
| CN202210249403.4A CN115045935B (en) | 2021-04-01 | 2021-04-01 | Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110356148.9A Division CN113236694B (en) | 2021-04-01 | 2021-04-01 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115045935A CN115045935A (en) | 2022-09-13 |
| CN115045935B true CN115045935B (en) | 2023-06-13 |
Family
ID=77130942
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210249403.4A Active CN115045935B (en) | 2021-04-01 | 2021-04-01 | Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator |
| CN202110356148.9A Active CN113236694B (en) | 2021-04-01 | 2021-04-01 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110356148.9A Active CN113236694B (en) | 2021-04-01 | 2021-04-01 | Self-resetting air brake braking device of large hydroelectric generator and abrasion detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN115045935B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372221A (en) * | 1992-07-20 | 1994-12-13 | Otis Elevator Company | Active brake sensor |
| GB0500304D0 (en) * | 2005-01-08 | 2005-02-16 | Dunlop Aerospace Ltd | Electrically actuated aircraft brakes |
| CN103995263A (en) * | 2014-05-20 | 2014-08-20 | 山东科技大学 | Timeline-based ultrasonic ranging method |
| CN105333042A (en) * | 2015-11-26 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Brake block assembly used on brake and automatic detection system of brake block assembly |
| WO2018026745A1 (en) * | 2016-08-02 | 2018-02-08 | Trw Automotive U.S. Llc | Brake pad wear sensor |
| CN109027068A (en) * | 2018-10-24 | 2018-12-18 | 洛阳九亿重工集团有限公司 | One kind being used for mine hoist brake clearance full-automatic regulation device |
| CN208595030U (en) * | 2018-07-31 | 2019-03-12 | 中国长江电力股份有限公司 | A kind of Hydropower Unit braking air lock control device continuously measured |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674192B (en) * | 2011-03-08 | 2014-08-06 | 淮南矿业(集团)有限责任公司 | Mining high-speed slippage preventive winch |
| CN204845899U (en) * | 2015-07-28 | 2015-12-09 | 梁辉 | Pneumatic all -in -one of pneumatics and car braking energy retrieve and auxiliary starting device |
-
2021
- 2021-04-01 CN CN202210249403.4A patent/CN115045935B/en active Active
- 2021-04-01 CN CN202110356148.9A patent/CN113236694B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372221A (en) * | 1992-07-20 | 1994-12-13 | Otis Elevator Company | Active brake sensor |
| GB0500304D0 (en) * | 2005-01-08 | 2005-02-16 | Dunlop Aerospace Ltd | Electrically actuated aircraft brakes |
| CN103995263A (en) * | 2014-05-20 | 2014-08-20 | 山东科技大学 | Timeline-based ultrasonic ranging method |
| CN105333042A (en) * | 2015-11-26 | 2016-02-17 | 成都九十度工业产品设计有限公司 | Brake block assembly used on brake and automatic detection system of brake block assembly |
| WO2018026745A1 (en) * | 2016-08-02 | 2018-02-08 | Trw Automotive U.S. Llc | Brake pad wear sensor |
| CN109715971A (en) * | 2016-08-02 | 2019-05-03 | Trw汽车美国有限责任公司 | Brake pad wear sensor |
| CN208595030U (en) * | 2018-07-31 | 2019-03-12 | 中国长江电力股份有限公司 | A kind of Hydropower Unit braking air lock control device continuously measured |
| CN109027068A (en) * | 2018-10-24 | 2018-12-18 | 洛阳九亿重工集团有限公司 | One kind being used for mine hoist brake clearance full-automatic regulation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115045935A (en) | 2022-09-13 |
| CN113236694A (en) | 2021-08-10 |
| CN113236694B (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102641567A (en) | Intelligent control system and intelligent control method for fire engine | |
| CN201975334U (en) | Gas relay with on-line monitoring function | |
| CN115045935B (en) | Abrasion detection method for self-resetting air brake braking device of large hydroelectric generator | |
| CN211627699U (en) | On-line monitoring device for gas in transformer oil | |
| CN206429712U (en) | Gas transmission station self-operated type emergency safety stop valve | |
| CN204008086U (en) | A kind of spring force monitor | |
| CN214661652U (en) | Self-reset air brake braking device of large hydroelectric generator | |
| CN206505035U (en) | Inspection well cover damage detection device | |
| CN202322899U (en) | Intelligent water supply device for steel converter steam drum | |
| CN102965692B (en) | Automatic material blending control device for aluminum electrolytic bath | |
| CN115025434B (en) | Extra-high voltage converter station fire extinguishing system performance detection device | |
| CN201896732U (en) | Load increasing and reducing device of air compressor | |
| CN204116974U (en) | External boiler water level measuring and controlling device | |
| CN201661312U (en) | Mine compressed-air intelligent monitoring device | |
| CN102721541A (en) | Testing device and testing method for closing time of steam extraction check valve of steam turbine | |
| CN114063581B (en) | Intelligent adaptive ash conveying control system for coal-fired power plant | |
| CN105675219B (en) | ship pipeline pressure testing system | |
| CN209757120U (en) | Endless rope hydraulic braking shuttle car control device | |
| CN211015854U (en) | Tamping hammer breakage alarm system | |
| CN109026845A (en) | Blower stator blade adjusts hydraulic device Oil Leakage Detecting and protective device | |
| CN209617552U (en) | A kind of cement packing dust collecting system with intelligent detecting function | |
| CN208893530U (en) | A kind of fire-fighting experimental rig that remotely can be detected and be safeguarded | |
| CN208150731U (en) | A kind of tail ropes of elevator detection device | |
| CN111536304B (en) | Method for judging take-off of pilot operated safety valve | |
| CN207556810U (en) | A kind of vacuum degree of big shaft end of the hydraulic turbine and aeration valve actuating length detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |