Fault detection system for hydroelectric generating set

Abstract

The utility model relates to the technical field of fault detection, and discloses a fault detection system for a hydroelectric generating set, a generator of the hydroelectric generating set comprises a shell, a stator and a rotor, the stator comprises a stator iron core and a stator coil, and the fault detection system for the hydroelectric generating set comprises a distance measuring module, a control module and an alarm module, the distance measuring module is arranged on the inner side of a shell of the generator and connected with the shell, a distance measuring light path in the axial direction of the rotor is formed on the distance measuring module, and the distance measuring light path is close to the stator coil and located on the lower side of the stator coil; the control module is arranged on the inner side of the shell and connected with the shell, and the control module is electrically connected with the distance measuring module and used for recording and comparing the actual distance measured by the distance measuring module with the preset distance. And the alarm module is arranged in the shell and is electrically connected with the control module so as to remind a worker to pay attention to bad conditions possibly causing faults in the generator and arrange maintenance time and a maintenance scheme in advance, the shutdown maintenance time is shortened, and the benefits of the hydroelectric generating set are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fault detection, in particular to a fault detection system for a hydroelectric generator set. Background Art

[0002] The hydroelectric generator set consists of a turbine, a generator, a speed governor, and a hydraulic control system. The generator is an important energy conversion device, which consists of a housing, a stator, and a rotor. The stator includes a stator core and a stator coil.

[0003] When a hydroelectric generator is in operation, it will generate a lot of heat, causing the inside of the generator to be in a high temperature state; the coils, slot wedges, gaskets, etc. that are in high temperature operation for a long time are prone to shrinkage and thus loosening. After loosening, the stator coil sinks due to gravity. After the stator coil sinks, it will cause the main insulation to wear, damage the coil and even cause a short circuit. The above structure is located inside the generator casing, which makes it difficult for management personnel to discover this situation in time, which can easily lead to serious consequences. Utility Model Content

[0004] The main purpose of the utility model is to provide a fault detection system for a hydroelectric generator set, aiming to realize early warning of loosening and sinking of a generator stator coil.

[0005] To achieve the above-mentioned purpose, the utility model proposes a hydraulic generator fault detection system, wherein the generator of the hydraulic generator set includes a housing, a stator and a rotor, the stator includes a stator core and a stator coil, and the hydraulic generator set fault detection system includes:

[0006] A distance measuring module, the distance measuring module is arranged inside the housing of the generator and connected to the housing, the distance measuring module forms a distance measuring optical path along the axial direction of the rotor, the distance measuring optical path is close to the stator coil and is located at the lower side of the stator coil;

[0007] a control module, the control module being disposed inside the housing and connected to the housing, the control module being electrically connected to the distance measuring module and being used to record and compare an actual distance measured by the distance measuring module with a preset distance; and

[0008] An alarm module is disposed in the housing and is electrically connected to the control module.

[0009] Optionally, the distance measuring module includes a first distance measuring device and a second distance measuring device provided on the housing;

[0010] The first rangefinder and the second rangefinder are arranged at intervals in the vertical direction, the first rangefinder emits a first rangefinder optical path along the axial direction of the rotor, the second rangefinder forms a second rangefinder optical path along the axial direction of the rotor, the first rangefinder optical path is close to the stator coil and located at the lower side of the stator coil, and the second rangefinder optical path is close to the first rangefinder optical path and located at the lower side of the first rangefinder optical path;

[0011] The first rangefinder and the second rangefinder are both electrically connected to the control module.

[0012] Optionally, a mounting hole is formed at at least one end of the shell in the axial direction of the rotor, and the ranging module is arranged in the mounting hole.

[0013] Optionally, the mounting hole is a waist-shaped hole, and the length direction of the waist-shaped hole is arranged along the up-down direction.

[0014] Optionally, the housing is formed with a mounting hole at two ends in the axial direction of the rotor, respectively, and the two mounting holes are at least partially staggered in the up-and-down direction.

[0015] Optionally, the generator set fault detection system further comprises a mounting seat, which is arranged at the mounting hole and is detachably connected to the housing;

[0016] The distance measuring module is arranged on the mounting seat.

[0017] Optionally, the housing is further formed with a first locking hole, and the mounting seat is formed with a second locking hole;

[0018] The first locking hole is arranged close to the mounting hole, and the second locking hole is directly opposite to the first locking hole, so that the mounting seat can be locked on the shell by bolts and nuts.

[0019] Optionally, one end of the rotor is an input end, and the other end of the rotor passes through the shell to the outside of the shell and is provided with a cooling fan, and the cooling fan forms a cooling air duct covering at least a portion of the shell.

[0020] Optionally, a protective shell is provided on the outer side of the shell, and the protective shell is formed with a porous structure and covers the heat dissipation fan.

[0021] Optionally, the hydroelectric generator set fault detection system further includes a display;

[0022] The display is electrically connected to the control module and is used to display the first distance and the safety distance.

[0023] In the technical solution of the utility model, a ranging optical path located at the lower side of the stator coil is formed by a ranging module. When the generator is fault-free, the distance measured by the ranging module is the distance between it and the inner wall at the other end of the shell. When the stator coil is loosened and sinks, it will block the ranging optical path. At this time, the distance measured by the ranging module changes, and this change is transmitted to the control module. The control module compares and obtains that the actual distance is less than the preset distance, and then controls the alarm module to alarm, so as to remind the staff to pay attention to the adverse conditions that may cause failures in the generator, arrange maintenance time and maintenance plan in advance, reduce the situation of sudden failures, reduce the time of downtime for maintenance, and improve the efficiency of the hydropower generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A structural schematic diagram of an embodiment of a fault detection system for a hydroelectric generator set provided by the utility model;

[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0027] Description of Figure Numbers:

[0028] Label name Label name 1000 dynamo 41 The first rangefinder 1 case 42 Second rangefinder 2 stator 5 Mounting Block 21 Stator core 6 Cooling fan 22 Stator coil 7 Protective case 3 Rotor 71 Porous structure 4 Distance measurement module

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The utility model proposes a fault detection system for a hydroelectric generator set. Figure 1 and Figure 2 This is an embodiment of the present utility model.

[0034] In the embodiment of the utility model, the fault detection system of the hydroelectric generator set is as follows: Figure 1 and Figure 2 As shown, the generator 1000 of the hydroelectric generator set includes a shell 1, a stator 2 and a rotor 3, the stator 2 includes a stator core 21 and a stator coil 22, and the fault detection system of the hydroelectric generator set includes a distance measuring module 4, a control module and an alarm module. The distance measuring module 4 is arranged on the inner side of the shell 1 of the generator 1000 and connected to the shell 1, and the distance measuring module 4 forms a distance measuring optical path along the axial direction of the rotor 3, and the distance measuring optical path is close to the stator coil 22 and is located at the lower side of the stator coil 22; the control module is arranged on the inner side of the shell 1 and connected to the shell 1, the control module is electrically connected to the distance measuring module 4 and is used to record and compare the actual distance measured by the distance measuring module 4 with the preset distance, and the alarm module is arranged in the shell 1, and the alarm module is electrically connected to the control module.

[0035] In the technical solution of the present utility model, a ranging optical path located at the lower side of the stator coil 22 is formed by the ranging module 4. When the generator 1000 is fault-free, the distance measured by the ranging module 4 is the distance between it and the inner wall at the other end of the shell 1. When the stator coil 22 is loosened and sinks, it will block the ranging optical path. At this time, the distance measured by the ranging module 4 changes, and this change is transmitted to the control module. The control module compares and obtains that the actual distance is less than the preset distance, and then controls the alarm module to alarm, so as to remind the staff to pay attention to the adverse conditions that may cause failures in the generator 1000, arrange maintenance time and maintenance plan in advance, reduce the situation of sudden failures, reduce the time of downtime for maintenance, and improve the efficiency of the hydropower generator set.

[0036] In order to distinguish the fault degree of the generator 1000, in one embodiment, the distance measuring module 4 includes a first distance measuring device 41 and a second distance measuring device 42 provided on the housing 1, the first distance measuring device 41 and the second distance measuring device 42 are arranged at intervals in the up and down directions, the first distance measuring device 41 emits a first distance measuring optical path along the axial direction of the rotor 3, the second distance measuring device 42 forms a second distance measuring optical path along the axial direction of the rotor 3, the first distance measuring optical path is close to the stator coil 22 and is located at the lower side of the stator coil 22, the second distance measuring optical path is close to the first distance measuring optical path and is located at the lower side of the first distance measuring optical path, the first distance measuring device 41 and the second distance measuring device 42 are both electrically connected to the control module, that is, the stator coil 22, the first distance measuring optical path and the second distance measuring optical path are electrically connected to the control module. The two ranging optical paths are arranged in sequence from top to bottom. When the stator coil 22 becomes loose and sinks, the first ranging optical path will be blocked first. After the control module receives this information, it can control the alarm module to issue a first-level alarm. When the first-level alarm occurs, it indicates that the stator coil 22 has begun to become loose and sink. When the stator coil 22 becomes loose and sinks to block the second ranging optical path, the control module receives this information and controls the alarm module to issue a second-level alarm. When the second-level alarm occurs, it indicates that the situation is already serious and the degree of looseness and sinking is high. It is necessary to immediately organize maintenance and replace the generator 1000 or parts of the generator 1000 such as the stator coil 22 to ensure smooth production and reduce the downtime required to deal with failures.

[0037] In order to realize the specific arrangement of the ranging module 4 on the shell 1, in one embodiment, the shell 1 is formed with a mounting hole at least at one end in the axial direction of the rotor 3, and the ranging module 4 is arranged in the mounting hole. Only when the ranging module 4 is installed at the end of the shell 1 in the axial direction of the rotor 3, can a ranging optical path covering each section of the stator coil 22 and located at the lower side of the stator coil 22 be formed. Therefore, no matter which part or the whole of the stator coil 22 is loosened and sunk, it can be detected by the ranging optical path.

[0038] In order to facilitate the adjustment of the distance between the ranging optical path and the stator coil 22 when the detection module is installed and determine a suitable spacing between the two, in one embodiment, the mounting hole is a waist-shaped hole, and the length direction of the waist-shaped hole is arranged along the up and down direction, that is, the position of the ranging module 4 in the up and down direction can be adjusted during installation to adjust the distance between the ranging optical path and the stator coil 22 in the up and down direction.

[0039] In order to prevent interference between the structures of the first rangefinder 41 and the second rangefinder 42, in one embodiment, the housing 1 is respectively formed with a mounting hole at both ends of the rotor 3 in the axial direction, and the two mounting holes are at least partially staggered in the up-down direction. The first rangefinder 41 and the second rangefinder 42 are respectively arranged at both ends of the housing 1 in the axial direction of the rotor 3 to prevent interference between the structures, and the two mounting holes are at least partially staggered in the up-down direction, which ensures that the first ranging optical path and the second ranging optical path formed by the first rangefinder 41 and the second rangefinder 42 are also staggered in the up-down direction to prevent interference between the optical paths.

[0040] In order to specifically implement the installation of the ranging module 4 in the mounting hole, in one embodiment, the generator set fault detection system also includes a mounting seat 5, and the ranging module 4 is arranged on the mounting seat 5, and the mounting seat 5 is arranged in the mounting hole and is detachably connected to the mounting hole. Since the ranging module 4 needs to ensure the installation accuracy during installation so that the ranging optical path does not tilt or only allows a very slight tilt, the ranging module 4 can be first installed on the mounting seat 5 outside the device to ensure the installation accuracy between the ranging module 4 and the mounting seat 5, and then the mounting seat 5 is installed in the mounting hole. Therefore, by adding the mounting seat 5, the specific installation of the ranging module 4 in the housing 1 can be achieved and the installation accuracy of the ranging module 4 can be guaranteed.

[0041] In order to specifically realize the detachable connection between the mounting base 5 and the shell 1, in one embodiment, the shell 1 is also formed with a first locking hole, and the mounting base 5 is formed with a second locking hole, the first locking hole is arranged close to the mounting hole, and the second locking hole is opposite to the first locking hole, so that the mounting base 5 can be locked on the shell 1 by bolts and nuts to realize the detachable connection between the mounting base 5 and the shell 1, and compared with detachable connection methods such as snap-fitting and magnetic attraction, the connection is more firm and reliable.

[0042] In order to enhance the heat dissipation effect of the generator 1000, in one embodiment, one end of the rotor 3 is the input end, and the other end of the rotor 3 passes through the shell 1 to the outside of the shell 1 and is provided with a cooling fan 6. The cooling fan 6 forms a cooling air duct covering at least a portion of the shell 1. When the rotor 3 rotates to generate electricity, it can also drive the cooling fan 6 to rotate and generate an airflow toward the shell 1 of the generator 1000 to enhance the heat dissipation effect of the generator 1000. There is no need to set other rotating shafts, and the structure is simpler.

[0043] In order to improve the safety performance of the generator 1000 and prevent the cooling fan 6 from being exposed and causing safety hazards, a protective shell 7 is provided on the outside of the shell 1, and the protective shell 7 is formed with a porous structure 71 and covers the cooling fan 6, that is, the cooling fan 6 is located between the shell 1 and the protective shell 7, and is protected by the shell 1 and the protective shell 7. The protective shell 7 is provided with the porous structure 71 to provide the cooling fan 6 with a flow of air that can enter between the shell 1 and the protective shell 7, thereby ensuring the heat dissipation effect of the cooling fan 6.

[0044] In order to facilitate the staff to grasp the fault condition of the generator 1000 of the hydroelectric generator set and to identify the specific location of the fault, in one embodiment, the fault detection system of the hydroelectric generator set further includes a display; the display is electrically connected to the control module and is used to display the actual distance and the preset distance. The specific location of the loosening and sinking of the stator coil 22 can be known through the actual distance, so that the staff can determine whether the loosening and sinking occurs as a whole or in a part. The display makes the loosening and sinking fault detection of the generator 1000 visualized, and the staff can more intuitively grasp the degree of the fault.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fault detection system for a hydroelectric generator set, wherein the generator of the hydroelectric generator set comprises a housing, a stator and a rotor, wherein the stator comprises a stator core and a stator coil, wherein: The hydraulic generator set fault detection system comprises: A distance measuring module, the distance measuring module is arranged inside the housing of the generator and connected to the housing, the distance measuring module forms a distance measuring optical path along the axial direction of the rotor, the distance measuring optical path is close to the stator coil and is located at the lower side of the stator coil; a control module, the control module being disposed inside the housing and connected to the housing, the control module being electrically connected to the distance measuring module and being used to record and compare an actual distance measured by the distance measuring module with a preset distance; and An alarm module is disposed in the housing and is electrically connected to the control module.

2. The fault detection system for a hydroelectric generator set according to claim 1, characterized in that: The distance measuring module comprises a first distance measuring device and a second distance measuring device provided in the housing; The first rangefinder and the second rangefinder are arranged at intervals in the vertical direction, the first rangefinder emits a first rangefinder optical path along the axial direction of the rotor, the second rangefinder forms a second rangefinder optical path along the axial direction of the rotor, the first rangefinder optical path is close to the stator coil and located at the lower side of the stator coil, and the second rangefinder optical path is close to the first rangefinder optical path and located at the lower side of the first rangefinder optical path; The first rangefinder and the second rangefinder are both electrically connected to the control module.

3. The fault detection system for a hydroelectric generator set according to claim 2, characterized in that: The housing is provided with a mounting hole at at least one end in the axial direction of the rotor, and the distance measuring module is arranged in the mounting hole.

4. The hydroelectric generator fault detection system according to claim 3, characterized in that: The mounting hole is a waist-shaped hole, and the length direction of the waist-shaped hole is arranged along the up-down direction.

5. The fault detection system for a hydroelectric generator set according to claim 3, characterized in that: The housing is respectively formed with a mounting hole at two ends in the axial direction of the rotor, and the two mounting holes are at least partially staggered in the up-down direction.

6. The hydroelectric generator fault detection system according to claim 3, characterized in that: The generator set fault detection system further comprises a mounting seat, which is arranged at the mounting hole and is detachably connected to the housing; The distance measuring module is arranged on the mounting seat.

7. The hydroelectric generator fault detection system according to claim 6, characterized in that: The housing is also formed with a first locking hole, and the mounting seat is formed with a second locking hole; The first locking hole is arranged close to the mounting hole, and the second locking hole is directly opposite to the first locking hole, so that the mounting seat can be locked on the shell by bolts and nuts.

8. The hydroelectric generator fault detection system according to claim 1, characterized in that: One end of the rotor is an input end, and the other end of the rotor passes through the shell to the outside of the shell and is provided with a cooling fan, wherein the cooling fan forms a cooling air duct covering at least a portion of the shell.

9. The hydroelectric generator fault detection system according to claim 8, characterized in that: A protective shell is disposed on the outer side of the housing, wherein the protective shell is formed with a porous structure and covers the heat dissipation fan.

10. The hydroelectric generator fault detection system according to claim 1, characterized in that: The hydroelectric generator set fault detection system also includes a display; The display is electrically connected to the control module and is used to display the actual distance and the preset distance.

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