CN109269389B - Automatic detection system for unit brake displacement and braking control method - Google Patents
Automatic detection system for unit brake displacement and braking control method Download PDFInfo
- Publication number
- CN109269389B CN109269389B CN201811069773.XA CN201811069773A CN109269389B CN 109269389 B CN109269389 B CN 109269389B CN 201811069773 A CN201811069773 A CN 201811069773A CN 109269389 B CN109269389 B CN 109269389B
- Authority
- CN
- China
- Prior art keywords
- brake
- sensor
- hydraulic generator
- generator set
- programmable logic
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- 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
- Y02E10/20—Hydro energy
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an automatic detection system for unit brake displacement, which comprises a programmable logic controller and a plurality of brake displacement detection sensors, wherein each brake displacement detection sensor comprises a sensor shell, a shell bottom sealing cover plate, a travel bar, a magnetic ring, a return spring, a brake release position Hall sensor, a brake position Hall sensor and an encoder module, the signal output end of each brake release position Hall sensor and the signal output end of each brake position Hall sensor of each brake displacement detection sensor are respectively connected with the on-off signal input end of a hydraulic generator unit brake corresponding to the programmable logic controller, and the signal end of the encoder module of each brake displacement detection sensor is respectively connected with the displacement signal end of the hydraulic generator unit brake corresponding to the programmable logic controller. The invention can rapidly and reliably sense the positions of various large hydraulic generator brakes under the environment of high Wen Gaoci.
Description
Technical Field
The invention relates to the technical field of hydropower station control equipment, in particular to an automatic detection system for unit brake displacement and a brake control method.
Background
The large-sized hydraulic generator set brake has extremely complex working environment, larger electromagnetic field and higher working temperature, and larger dust and oil stain pollution can be generated in the braking process.
The unit brake position detection is mainly used for correctly reflecting the position of a brake (the brake is jacked or released), so that the startup of the generator set under the condition of jacking the brake is avoided, and the normal execution of the automatic control flow of the unit is ensured when the unit is stopped.
The braking system of the unit is generally formed by uniformly distributing 10-12 brakes on a brake disc of a hydroelectric generating set along the circumferential direction (more ultra-large hydroelectric generating sets). At present, each national big hydropower design institute can only use traditional and existing automatic elements for detecting the position of each brake, and a common mode is that the brake is detected through an upper mechanical travel switch and a lower mechanical travel switch.
After the upper cavity or the lower cavity of the brake is inflated or exhausted in the conventional mechanical travel switch detection, the travel rod is driven to act, and a baffle plate welded on the travel rod is contacted with the travel switch to judge the position of the brake. In order to ensure safety, the jack-up position contacts of 10 (or 12) brakes are connected in parallel by hard wires, any one brake jack-up sends a brake jack-up signal to the monitoring system, the release position contacts of 10 (or 12) brakes are connected in series by hard wires, and each brake must be released to send a release position signal to the monitoring system.
Problems plaguing original brake position monitoring for hydroelectric power plants for many years include:
1. the risk of falling off the baffle is high, and the mechanical travel switch must require stress contact, and the contact force must reach a certain value to act, so that the requirement on the welding position of the travel rod baffle is high, if the welding position is too close, the contact stress is high, and the risk of falling off the baffle exists; if the welding position is too far, the travel switch cannot be operated. Because the strokes of the brake are not consistent after each operation, the baffle plates are generally welded at a relatively close position in order to ensure that the travel switch can act, so that the risk of falling off the baffle plates is high.
2. The travel switch cannot be positioned, and because the brake travel switch is directly connected in series or connected to the monitoring system by hard wires, the monitoring system can only detect whether the whole state of 10 (or 12) brakes is jacking or releasing, and the position of each brake cannot be distinguished. When abnormal conditions occur, operation and maintenance personnel must enter the lower wind tunnel to check one by one to determine the fault brake, so that the labor intensity is high, the risk coefficient is high, and the working benefit is extremely low.
Disclosure of Invention
The invention aims to provide an automatic detection system for unit brake displacement and a brake control method, which have higher reliability and can rapidly and reliably sense the positions of large hydraulic generator brakes with various specifications under the environment of high Wen Gaoci.
In order to achieve the purpose, the automatic detection system for the displacement of the unit brake, which is designed by the invention, is characterized in that: the device comprises a programmable logic controller and a plurality of brake displacement detection sensors, wherein each brake displacement detection sensor comprises a sensor shell, a shell bottom sealing cover plate, a travel rod, a magnetic ring, a reset spring, a brake release position Hall sensor, a brake position Hall sensor and an encoder module, wherein a travel cavity is arranged in the sensor shell, a through hole communicated with the travel cavity is formed in the top of the sensor shell, the bottom end of the travel rod penetrates through the through hole and is positioned in the travel cavity, the magnetic ring is installed on the bottom side surface of the travel rod, the shell bottom sealing cover plate is installed at the bottom of the sensor shell and covers the travel cavity, the bottom end of the reset spring is connected with the shell bottom sealing cover plate, the top end of the reset spring props against the bottom end of the travel rod, two sensor installation slideways which are parallel to each other are respectively arranged on the outer side surface of the sensor shell along the length direction of the sensor shell, the magnetic ring of the travel rod moves to the corresponding position Hall sensor of the brake release position Hall sensor or the brake position Hall sensor, the corresponding position sensor of the brake release position Hall sensor is positioned in the sensor shell, the encoder module is positioned in the corresponding position sensor cavity of the brake release position Hall sensor or the brake position Hall sensor, and the encoder module is positioned in the encoder module, and the sensor shell is positioned in the encoder cavity;
the sensor shell of each brake displacement detection sensor is fixed on the base of the corresponding hydroelectric generating set brake, and the top of the travel rod of each brake displacement detection sensor is used for directly propping against the brake block of the hydroelectric generating set brake;
the signal output ends of the brake release position Hall sensor and the brake position Hall sensor of each brake displacement detection sensor are respectively connected with the on-off signal input ends of the hydraulic generator set brake corresponding to the programmable logic controller, and the signal communication end of the encoder module of each brake displacement detection sensor is sequentially connected with the signal communication end of the hydraulic generator set brake corresponding to the programmable logic controller (one of the wiring modes of the 485 bus) in a hand-in-hand manner according to the arrangement sequence.
The invention has higher reliability by utilizing the Hall effect principle design, and can rapidly and reliably sense the positions of the large hydraulic generator brakes with various specifications under the environment of high Wen Gaoci. The device can continuously and stably operate for a long time, is convenient to install, wire and adjust, has strong visibility applicability and simple operation and maintenance, and can greatly reduce the safety risk and labor intensity of operation and maintenance personnel.
The automatic detection method for the displacement of the unit brake of the system comprises the following steps:
step 1: each hydraulic generator set brake on the hydraulic generator performs synchronous brake release or brake action under the control of a hydraulic generator set remote control terminal;
step 2: the brake release position Hall sensor of each hydroelectric generating set brake respectively senses a brake release in-place signal of the corresponding hydroelectric generating set brake and sends the brake release in-place signal to the programmable logic controller, and the brake position Hall sensor of each hydroelectric generating set brake respectively senses a brake in-place signal of the corresponding hydroelectric generating set brake and sends the brake in-place signal to the programmable logic controller;
meanwhile, an encoder module of each hydroelectric generating set brake senses a real-time travel signal of a brake block of the hydroelectric generating set brake and sends the real-time travel signal of the brake block to a programmable logic controller;
step 3: the programmable logic controller performs the following judgment according to the received signals:
when the brake release position of the hydraulic generator set brake outputs a brake release in-place signal or a brake block real-time travel signal output by an encoder module of the hydraulic generator set brake is 0-5% of a brake block full travel, judging that the current hydraulic generator set brake is released;
when the brake position Hall sensor of the hydraulic generator set brake outputs a brake in-place signal of the brake and the real-time travel signal of the brake block output by the encoder module of the hydraulic generator set brake is 100% of the full travel of the brake block, judging that the hydraulic generator set brake is currently braked;
the programmable logic controller transmits the working state signals of the brakes of the water-turbine generator sets to the remote control terminal of the water-turbine generator sets;
step 4: the remote control terminal of the hydroelectric generating set judges according to the received signals as follows:
when all the working states of the hydraulic generator set brakes are released, the hydraulic generator set is confirmed to be in a brake release state, and when one hydraulic generator set brake is in a brake state, the hydraulic generator set is confirmed to be in a brake state.
The remote control terminal and the programmable logic controller of the hydro-generator set comprehensively judge the signals output by the brake displacement detection sensors in the mode, so that the braking condition of the hydro-generator brake can be more comprehensively known, the occurrence of monitoring errors of the braking condition of the hydro-generator brake is prevented, and meanwhile, each brake displacement detection sensor adopts double judgment of the limit position and the travel rod displacement distance, so that the accuracy of the sensing of the braking condition of the hydro-generator brake is further improved.
Drawings
FIG. 1 is a schematic diagram showing the front view of a brake displacement detection sensor according to the present invention;
FIG. 2 is a schematic side view of a brake displacement sensor according to the present invention;
FIG. 3 is a schematic cross-sectional view of a brake displacement detection sensor according to the present invention;
FIG. 4 is a schematic diagram of the front view of an encoder module of the present invention;
FIG. 5 is a schematic cross-sectional view of an encoder module of the present invention;
FIG. 6 is a diagram showing the state of use of the brake displacement detection sensor according to the present invention;
fig. 7 is a block diagram of the electric control part of the present invention.
The device comprises a 1-brake displacement detection sensor, a 1.1-sensor shell, a 1.2-shell bottom sealing cover plate, a 1.3-travel rod, a 1.4-magnetic ring, a 1.5-reset spring, a 1.6-brake release position Hall sensor, a 1.7-brake position Hall sensor, a 1.8-encoder module, a 1.9-travel cavity, a 1.10-through hole, a 1.11-sensor mounting slideway, a 1.12-gear cavity, a 1.13-encoder gear, a 1.14-rack, a 1.15-encoder shell, a 1.16-rotary coupling, a 1.17-contactless rotary encoder, a 1.18-rotary bipolar magnet, a 1.19-bearing, a 1.20-dustproof sealing ring, a 1.21-sensor package type mounting bracket, a 2-programmable logic controller, a 3-hydro-generator set remote control terminal, a 4-hydro-generator set brake, a 4.1-base, a 4.2-brake block and a 5-support bar.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
an automatic detection system for unit brake displacement, as shown in fig. 1-7, comprises a programmable logic controller 2 and a plurality of brake displacement detection sensors 1 (generally 10 or 12), wherein each brake displacement detection sensor 1 comprises a sensor housing 1.1, a housing bottom sealing cover plate 1.2, a travel rod 1.3, a magnetic ring 1.4, a return spring 1.5, a brake release position hall sensor 1.6, a brake position hall sensor 1.7 and an encoder module 1.8, wherein a travel cavity 1.9 is arranged in the sensor housing 1.1, a through hole 1.10 communicated with the travel cavity 1.9 is arranged at the top of the sensor housing 1.1, the bottom end of the travel rod 1.3 passes through the through hole 1.10 and is positioned in the travel cavity 1.9, the magnetic ring 1.4 is arranged on the bottom side surface of the travel rod 1.3, the bottom sealing cover plate 1.2 of the shell is arranged at the bottom of the sensor shell 1.1 and covers the travel cavity 1.9 (a sealing ring is arranged between the edge of the bottom sealing cover plate 1.2 of the shell and the inner side of the travel cavity 1.9), the bottom end of the return spring 1.5 is connected with the bottom sealing cover plate 1.2 of the shell, the top end of the return spring 1.5 props against the bottom end of the travel rod 1.3, two parallel sensor mounting slide ways 1.11 are arranged on the outer side surface of the sensor shell 1.1 along the length direction of the sensor shell 1.1, a brake release position Hall sensor 1.6 and a brake braking position Hall sensor 1.7 are respectively arranged on the two sensor mounting slide ways 1.11 (the mounting positions of the brake release position Hall sensor 1.6 and the brake braking position Hall sensor 1.7 can be finely adjusted on the sensor mounting slide ways and fixed at a preset position), when the magnetic ring 1.4 of the travel rod 1.3 moves to the corresponding position of the brake release position Hall sensor 1.6 or the brake position Hall sensor 1.7, the corresponding brake release position Hall sensor 1.6 or brake position Hall sensor 1.7 can be triggered, the sensor shell 1.1 is provided with an encoder module 1.8, a gear cavity 1.12 is formed in the sensor shell 1.1, an encoder gear 1.13 of the encoder module 1.8 is positioned in the gear cavity 1.12, a part of the travel rod 1.3 positioned in the travel cavity 1.9 is provided with a rack 1.14 matched with the encoder gear 1.13, and the rack 1.14 is processed by a machining technology of high-precision low-speed wire cutting;
the sensor shell 1.1 of each brake displacement detection sensor 1 is fixed on the base 4.1 of the corresponding hydroelectric generating set brake 4, and the top of the travel rod 1.3 of each brake displacement detection sensor 1 is used for directly supporting the brake block 4.2 of the hydroelectric generating set brake 4 through the supporting bar 5;
the signal output ends of the brake release position Hall sensor 1.6 and the brake position Hall sensor 1.7 of each brake displacement detection sensor 1 are respectively connected with the brake on-off signal input ends of the hydroelectric generating set corresponding to the programmable logic controller 2, and the signal communication end of the encoder module 1.8 of each brake displacement detection sensor 1 is sequentially connected with the signal communication end of the hydroelectric generating set brake displacement corresponding to the programmable logic controller 2 in a hand-in-hand manner according to the arrangement sequence.
In the above technical scheme, the remote control system further comprises a remote control terminal 3 of the hydro-generator set, wherein the release signal output end of each hydro-generator set brake and the brake signal output end of each hydro-generator set brake of the programmable logic controller 2 are respectively connected with the corresponding state signal feedback end of the hydro-generator set brake of the remote control terminal 3 of the hydro-generator set.
In the above technical solution, the encoder module 1.8 includes an encoder housing 1.15, an encoder gear 1.13, a rotary shaft coupling 1.16, a contactless rotary encoder 1.17 and a rotary bipolar magnet 1.18, where the encoder housing 1.15 is mounted on the sensor housing 1.1, the encoder gear 1.13 is mounted at one end of the rotary shaft coupling 1.16, the rotary bipolar magnet 1.18 is mounted at the other end of the rotary shaft coupling 1.16, the contactless rotary encoder 1.17 is mounted in the encoder housing 1.15 and matched with the rotary bipolar magnet 1.18, the rotary shaft coupling 1.16 is mounted in the encoder housing 1.15 through a bearing 1.19 (high-speed micro bearing), the encoder gear 1.13 is located in the gear chamber 1.12, and the signal communication end of the contactless rotary encoder 1.17 is used for outputting displacement data corresponding to the hydraulic generator set brake. The contactless rotary encoder 1.17 uses the information of the angle between the contactless rotary encoder 1.17 and the rotary dipole magnet 1.18 in 12-bit absolute gray code data format and the 6-bit status bit of the chip. I.e. 18 bits in length data form. The encoder module 1.8 and the programmable logic controller 2 are transmitted through a MODBUS RTU communication protocol, and data transmission is realized through a half-duplex RS-485/RS-422 transceiver and a double-channel digital isolator.
In the technical scheme, a dustproof sealing ring 1.20 is arranged between the through hole 1.10 and the travel rod 1.3, and the dustproof sealing ring 1.20 is fixed on the inner wall of the through hole 1.10.
Among the above-mentioned technical scheme, it still includes sensor parcel formula installing support 1.21, the base 4.1 of the corresponding hydroelectric set stopper 4 of bottom fixed connection of sensor parcel formula installing support 1.21, sensor casing 1.1 installs on sensor parcel formula installing support 1.21, and sensor casing 1.1 has 20 mm's upper and lower movable range in sensor parcel formula installing support 1.21 side to can fix in good time in this movable range. The design can enable the brake displacement detection sensor 1 to adapt to various types and sizes of hydraulic generator set brakes 4.
In the above technical scheme, the top end of the travel bar 1.3 is a hemispherical measuring head. The hemispherical measuring head is in point contact with the measured object, so that the influence of lateral force can be eliminated, and only axial force is received.
In the above technical scheme, the fault signal output end of the programmable logic controller or the brake displacement detection sensor of the programmable logic controller 2 is connected with the fault signal input signal end of the remote control terminal 3 of the hydroelectric generating set.
In the above technical solution, the brake displacement detection sensors 1 do not need to manually calibrate zero points, and the displacement after the system is installed for the first time is used as the initial brake release limit position value and the brake limit position value of the hydraulic generator set brake 4 respectively, and the initial difference value of the initial brake release limit position value and the brake limit position value is used as the initial full stroke value of the brake displacement detection sensors 1. The difference between the actual measurement value and the initial brake release limit position value is displayed as the displacement amount of the brake displacement detection sensor 1.
In the above technical scheme, the system can measure the wear of the brake, and the wear of the brake Δx=x1-X0 is ideal if the initial full stroke is X0mm and the actual full stroke is X1 mm. And calculating the full stroke of the brake after each jacking time by a program, calculating the abrasion loss, storing and displaying the abrasion loss, and checking the abrasion loss through a trend chart.
In addition, in order to analyze the wear condition of each brake displacement detection sensor 1, the system records the brake that is braked first in the action process of each brake displacement detection sensor 1, and counts the number of times that each brake displacement detection sensor 1 is jacked up first, and the counted number of times is used as a reference data for analyzing the friction condition of the brake.
In the above technical solution, the installation position of the hall sensor 1.6 on the left sensor installation slideway 1.11 corresponds to the release position of the brake block of the hydro-generator set, and the installation position of the hall sensor 1.7 on the right sensor installation slideway 1.11 corresponds to the brake position of the brake block of the hydro-generator set (can also be defined by oneself according to the actual situation).
The automatic detection method for the displacement of the unit brake of the system comprises the following steps:
step 1: each hydraulic generator set brake 4 on the hydraulic generator carries out synchronous brake release or brake action under the control of the hydraulic generator set remote control terminal 3;
step 2: the brake release position hall sensor 1.6 of each hydroelectric generating set brake 4 respectively senses a brake release in-place signal of the corresponding hydroelectric generating set brake 4 and sends the brake release in-place signal to the programmable logic controller 2, and the brake position hall sensor 1.7 of each hydroelectric generating set brake 4 respectively senses a brake in-place signal of the corresponding hydroelectric generating set brake 4 and sends the brake in-place signal to the programmable logic controller 2;
meanwhile, the encoder module 1.8 of each hydroelectric generating set brake 4 senses a real-time travel signal of a brake block of each hydroelectric generating set brake 4 and sends the real-time travel signal of the brake block to the programmable logic controller 2;
step 3: the programmable logic controller 2 makes the following judgment according to the received signal:
when the hall sensor 1.6 at the brake release position of the hydro-generator set brake 4 outputs a brake release in-place signal or the real-time brake block travel signal output by the encoder module 1.8 of the hydro-generator set brake 4 is 0-5% of the full brake block travel, the current hydro-generator set brake 4 is judged to be released (if only the hall switch element signal is likely to appear, because the travel is not completely in place and the hall element is not communicated, the judgment of whether the brake is released or not cannot be made, and the automatic starting-up flow of the mechanism cannot be carried out);
when the brake position Hall sensor 1.7 of the hydroelectric generating set brake 4 outputs a brake in-place signal and the real-time travel signal of the brake block output by the encoder module 1.8 of the hydroelectric generating set brake 4 is 100% of the full travel of the brake block, judging that the current hydroelectric generating set brake 4 brakes (providing a criterion for the brake of the brake);
the programmable logic controller 2 transmits the working state signals of the hydraulic generator set brakes 4 to the hydraulic generator set remote control terminal 3;
step 4: the remote control terminal 3 of the hydroelectric generating set performs the following judgment according to the received signals:
when all the working states of the hydraulic generator set brakes 4 are released, confirming that the hydraulic generator set is in a brake release state, and when the working state of one hydraulic generator set brake 4 is in a brake state, confirming that the hydraulic generator set is in a brake state;
and 5, the remote control terminal 3 of the hydroelectric generating set receives the working state signals of the brakes 4 of the hydroelectric generating set and the corresponding serial number information of the brakes of the hydroelectric generating set, and when the working state of the brakes 4 of the hydroelectric generating set is inconsistent with the control command sent by the remote control terminal 3 of the hydroelectric generating set in the step 1, the brakes 4 of the hydroelectric generating set have fault risks, and the remote control terminal 3 of the hydroelectric generating set determines the brakes 4 of the hydroelectric generating set with fault risks by inquiring the serial number information of the corresponding brakes of the hydroelectric generating set.
In step 3 of the above technical solution, the programmable logic controller 2 monitors the displacement data range of the output signal of each brake displacement detection sensor 1, when there is a displacement data range of the output signal of a certain brake displacement detection sensor 1 that is not within the preset displacement data range in which the sensor normally works, the programmable logic controller 2 sends a signal of the failure of the brake displacement detection sensor 1 to the remote control terminal 3 of the hydro-turbo generator set, and meanwhile, if there is a system failure inside the programmable logic controller 2, the programmable logic controller 2 also sends a signal of the failure of the programmable logic controller to the remote control terminal 3 of the hydro-turbo generator set.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (9)
1. An automatic detection system for unit brake displacement is characterized in that: the device comprises a programmable logic controller (2) and a plurality of brake displacement detection sensors (1), wherein each brake displacement detection sensor (1) comprises a sensor shell (1.1), a shell bottom sealing cover plate (1.2), a stroke rod (1.3), a magnetic ring (1.4), a reset spring (1.5), a brake release position Hall sensor (1.6), a brake position Hall sensor (1.7) and an encoder module (1.8), a stroke cavity (1.9) is arranged in the sensor shell (1.1), a through hole (1.10) communicated with the stroke cavity (1.9) is formed in the top of the sensor shell (1.1), the bottom end of the stroke rod (1.3) penetrates through the through hole (1.10) and is positioned in the stroke cavity (1.9), the bottom side surface of the stroke rod (1.3) is provided with the magnetic ring (1.4), the shell bottom sealing cover plate (1.2) is arranged at the bottom of the sensor shell (1.1) and covers the bottom of the stroke cavity (1.1) and the bottom of the sensor shell (1.9), the bottom end of the reset spring (1.1.3) is connected with the top end of the sensor shell (1.1.1) along the direction of the top of the two parallel to the top of the shell (1.1), the two sensor mounting slides (1.11) are respectively provided with a brake release position Hall sensor (1.6) and a brake braking position Hall sensor (1.7), a magnetic ring (1.4) of a travel rod (1.3) moves to the corresponding position of the brake release position Hall sensor (1.6) or the brake braking position Hall sensor (1.7) to trigger the corresponding brake release position Hall sensor (1.6) or the brake braking position Hall sensor (1.7), an encoder module (1.8) is arranged on a sensor shell (1.1), a gear cavity (1.12) is formed in the sensor shell (1.1), an encoder gear (1.13) of the encoder module (1.8) is positioned in the gear cavity (1.12), and a rack (1.14) matched with the encoder gear (1.13) is arranged on the part of the travel rod (1.3) positioned in the travel cavity (1.9);
the sensor shell (1.1) of each brake displacement detection sensor (1) is fixed on the base (4.1) of the corresponding hydroelectric generating set brake (4), and the top of the travel rod (1.3) of each brake displacement detection sensor (1) is used for directly supporting the brake block (4.2) of the hydroelectric generating set brake (4);
the signal output ends of a brake release position Hall sensor (1.6) and a brake braking position Hall sensor (1.7) of each brake displacement detection sensor (1) are respectively connected with a hydro-generator set brake switching signal input end corresponding to a programmable logic controller (2), and the signal communication end of an encoder module (1.8) of each brake displacement detection sensor (1) is sequentially connected with the hydro-generator set brake displacement signal communication end corresponding to the programmable logic controller (2) in a pulling way according to the arrangement sequence;
the encoder module (1.8) comprises an encoder housing (1.15), an encoder gear (1.13), a rotary coupling (1.16), a non-contact rotary encoder (1.17) and a rotary bipolar magnet (1.18), wherein the encoder housing (1.15) is arranged on the sensor housing (1.1), the encoder gear (1.13) is arranged at one end of the rotary coupling (1.16), the rotary bipolar magnet (1.18) is arranged at the other end of the rotary coupling (1.16), the non-contact rotary encoder (1.17) is arranged in the encoder housing (1.15) and matched with the rotary bipolar magnet (1.18), the rotary coupling (1.16) is arranged in the encoder housing (1.15) through a bearing (1.19), the encoder gear (1.13) is arranged in a gear chamber (1.12), and a signal communication end of the non-contact rotary encoder (1.17) is used for outputting corresponding hydroelectric generating set brake displacement data.
2. The unit brake displacement automatic detection system according to claim 1, wherein: the hydraulic generator set remote control system is characterized by further comprising a hydraulic generator set remote control terminal (3), wherein the hydraulic generator set brake release signal output end and the hydraulic generator set brake signal output end of the programmable logic controller (2) are respectively connected with the corresponding hydraulic generator set brake state signal feedback end of the hydraulic generator set remote control terminal (3).
3. The unit brake displacement automatic detection system according to claim 1, wherein: a dustproof sealing ring (1.20) is arranged between the through hole (1.10) and the travel rod (1.3), and the dustproof sealing ring (1.20) is fixed on the inner wall of the through hole (1.10).
4. The unit brake displacement automatic detection system according to claim 1, wherein: the hydraulic generator brake system further comprises a sensor package type mounting bracket (1.21), wherein the bottom end of the sensor package type mounting bracket (1.21) is fixedly connected with a base (4.1) corresponding to the hydraulic generator set brake (4), a sensor shell (1.1) is mounted on the sensor package type mounting bracket (1.21), and the sensor shell (1.1) has an up-and-down movement range of 20mm on the side surface of the sensor package type mounting bracket (1.21) and can be timely fixed in the movement range.
5. The unit brake displacement automatic detection system according to claim 1, wherein: the top end of the travel rod (1.3) is a hemispherical measuring head.
6. The unit brake displacement automatic detection system according to claim 2, wherein: the programmable logic controller or the brake displacement detection sensor fault signal communication end of the programmable logic controller (2) is connected with the fault signal communication end of the remote control terminal (3) of the hydroelectric generating set.
7. A method for automatically detecting the displacement of a unit brake in a system according to claim 1, comprising the steps of:
step 1: each hydraulic generator set brake (4) on the hydraulic generator performs synchronous brake release or brake action under the control of a hydraulic generator set remote control terminal (3);
step 2: the brake release position Hall sensor (1.6) of each hydroelectric generating set brake (4) respectively senses a brake release in-place signal of the corresponding hydroelectric generating set brake (4) and sends the brake release in-place signal to the programmable logic controller (2), and the brake position Hall sensor (1.7) of each hydroelectric generating set brake (4) respectively senses a brake in-place signal of the corresponding hydroelectric generating set brake (4) and sends the brake in-place signal to the programmable logic controller (2);
meanwhile, an encoder module (1.8) of each hydroelectric generating set brake (4) senses a real-time travel signal of a brake block of each hydroelectric generating set brake (4) and sends the real-time travel signal of the brake block to a programmable logic controller (2);
step 3: the programmable logic controller (2) makes the following judgment according to the received signals:
when a brake release position Hall sensor (1.6) of the hydroelectric generating set brake (4) outputs a brake release in-place signal or a brake block real-time travel signal output by an encoder module (1.8) of the hydroelectric generating set brake (4) is 0-5% of a brake block full travel, judging that the current hydroelectric generating set brake (4) is released;
when a brake position Hall sensor (1.7) of a hydraulic generator set brake (4) outputs a brake in-place signal and a brake block real-time travel signal output by an encoder module (1.8) of the hydraulic generator set brake (4) is 100% of a brake block full travel, judging that the current hydraulic generator set brake (4) brakes;
the programmable logic controller (2) transmits the working state signals of the hydraulic generator set brakes (4) to the hydraulic generator set remote control terminal (3);
step 4: the remote control terminal (3) of the hydroelectric generating set judges according to the received signals as follows:
when all the working states of the hydraulic generator set brakes (4) are released, the hydraulic generator set is confirmed to be in a brake release state, and when one working state of the hydraulic generator set brake (4) is braked, the hydraulic generator set is confirmed to be in a brake state.
8. The automatic detection method for unit brake displacement according to claim 7, wherein: the step 4 is followed by a step 5, the hydraulic generator set remote control terminal (3) receives the working state signals of the hydraulic generator set brakes (4) and corresponding hydraulic generator set brake number information, and when the working state of the hydraulic generator set brakes (4) is inconsistent with the control command sent by the hydraulic generator set remote control terminal (3) in the step 1, the hydraulic generator set brakes (4) have fault risks, and the hydraulic generator set remote control terminal (3) determines the hydraulic generator set brakes (4) with fault risks by inquiring the corresponding hydraulic generator set brake number information.
9. The automatic detection method for unit brake displacement according to claim 7, wherein: in the step 3, the programmable logic controller (2) monitors the displacement data range of the output signal of each brake displacement detection sensor (1), when a certain displacement data range of the output signal of the brake displacement detection sensor (1) is not in the preset displacement data range of the normal operation of the sensor, the programmable logic controller (2) sends a signal of the fault of the brake displacement detection sensor (1) to the remote control terminal (3) of the hydroelectric generating set, and meanwhile, if a system fault inside the programmable logic controller (2) exists, the programmable logic controller (2) also sends a signal of the fault of the programmable logic controller to the remote control terminal (3) of the hydroelectric generating set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069773.XA CN109269389B (en) | 2018-09-13 | 2018-09-13 | Automatic detection system for unit brake displacement and braking control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069773.XA CN109269389B (en) | 2018-09-13 | 2018-09-13 | Automatic detection system for unit brake displacement and braking control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109269389A CN109269389A (en) | 2019-01-25 |
| CN109269389B true CN109269389B (en) | 2023-05-02 |
Family
ID=65188604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811069773.XA Active CN109269389B (en) | 2018-09-13 | 2018-09-13 | Automatic detection system for unit brake displacement and braking control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109269389B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550323B (en) * | 2020-11-27 | 2022-05-27 | 株洲旭阳机电科技开发有限公司 | Intelligent railway wagon system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012202404B4 (en) * | 2012-02-16 | 2018-04-05 | Infineon Technologies Ag | Angle of rotation sensor for absolute rotation angle determination even with multiple revolutions |
| CN204381074U (en) * | 2014-12-19 | 2015-06-10 | 本钢板材股份有限公司 | A kind of rolling mill screwdown position sensor |
| CN105221511B (en) * | 2015-11-20 | 2017-06-06 | 广东水利电力职业技术学院 | A kind of pneumatic step-by-step impulse stroke valve |
| CN206095139U (en) * | 2016-10-24 | 2017-04-12 | 贵州北盘江电力股份有限公司董箐发电厂 | Stopper displacement detects sensor |
-
2018
- 2018-09-13 CN CN201811069773.XA patent/CN109269389B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109269389A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111638051A (en) | On-line monitoring and fault pre-judging method for state of disconnecting link | |
| CN109269389B (en) | Automatic detection system for unit brake displacement and braking control method | |
| CN105627086B (en) | SF6 electrical equipment automatic on-line making-up air devices | |
| CN102788570B (en) | On-line monitor for deformation of coal mine shaft guide | |
| CN109579641B (en) | Calandria effect detection device | |
| CN102943790A (en) | Intelligent hydraulic cylinder system | |
| CN208671908U (en) | Brake of hydroelectric generating set is displaced automatic detection sensor | |
| CN101793572B (en) | Method and device for multi-point on-line detection of digital hydraulic machine column stress | |
| CN201508419U (en) | Detecting device | |
| CN103470663A (en) | Wear sensor for friction plate of fan yaw brake | |
| CN106643607A (en) | Lathe cylindrical shell circular run-out detection device and circular run-out detection method | |
| CN202609745U (en) | Monitoring device of brake control system of mine hoist | |
| CN202427729U (en) | Screwdown inspection and detection device for hydraulic rolling mill | |
| CN204714363U (en) | Drilling machine platform crown block anti-collision and mud superpressure warning device | |
| CN107063674B (en) | Mine head sheave deflection and vibration performance detection device | |
| CN106286651A (en) | Wind power brake friction disc wear state detector | |
| CN105414247A (en) | Die wear detecting device of numerical control turret punch press | |
| CN215338246U (en) | Novel vacuum machine shaft displacement device | |
| CN219641946U (en) | Cable descending in-place detection device of hoist | |
| CN220511096U (en) | Proximity switch straight rod type trigger | |
| CN204666300U (en) | A kind of driving axis braking moment experiment table | |
| CN220869564U (en) | Hydraulic generator brake position feedback device based on machine vision technology | |
| CN204983832U (en) | Stereo garage terminal mounting structure | |
| CN203472197U (en) | Automatic mold sticking protection device for powder forming machine | |
| CN203364692U (en) | Composite detection mechanism for installing holes of control arm of rotary type rear subframe |
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 |