CN210927342U - Converter connection structure among power consumption system of power plant - Google Patents

Abstract

The utility model relates to a converter connection structure among power consumption system of power plant belongs to the technical field of energy-conserving transformation, and its scheme includes: the fan comprises a motor shaft, a fan shaft, a diaphragm coupling and a protective cover which is independently supported in the air through a supporting piece and covers the motor shaft, the fan shaft and the diaphragm coupling, wherein a hub at the motor end of the diaphragm coupling is connected with the motor shaft, a hub at the fan end of the diaphragm coupling is connected with the fan shaft, and a shaft vibration sensor and a sound sensor are arranged inside the protective cover. The utility model discloses after demolising the liquid coupling, through the direct hookup of diaphragm coupling with fan axle and motor shaft, do not add bearing support and axle sleeve, the eccentric problem that the artificial led to the fact when reducible maintenance, fan axle, motor shaft and diaphragm coupling pass through the protection casing cover and establish to detect fan axle, motor shaft and the diaphragm coupling in the operation through vibration and the sound sensor that set up in the protection casing, thereby in time discover the trouble from the ability, guarantee the safety of operation equipment.

Description

Converter connection structure among power consumption system of power plant

Technical Field

The utility model belongs to the technical field of the energy-conserving transformation of frequency conversion and specifically relates to a converter connection structure among power consumption system of power plant is related to.

Background

At present, a backward hydraulic coupler (hereinafter referred to as a liquid coupler) which is connected with a speed regulation device is still used for high-voltage motors of fans and water pumps in a plurality of power plants, and the liquid coupler belongs to a low-efficiency speed regulation device and has the defects of poor reliability, incapability of realizing automatic control and the like. The frequency conversion adjustment of the high-voltage motor is realized through the frequency converter, and the energy-saving modification of the traditional liquid coupling speed regulation is realized.

For example, in the frequency conversion and energy saving modification of the fan, the fluid coupling needs to be disassembled, and the fan shaft and the motor shaft are directly connected. Under actual working conditions, if the motor moves forwards and is directly connected with the fan, the motor foundation generally needs to be made again, the construction period is long, about 30 days is generally needed, and the existing overhaul opportunity of a power plant is difficult to be utilized for transformation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a converter connection structure among power consumption system of power plant, after demolising the liquid coupling, through the direct hookup of diaphragm coupling with fan axle and motor shaft, fan axle, motor shaft and diaphragm coupling are established through the protection casing cover to detect fan axle, motor shaft and the diaphragm coupling in the operation through vibration and the sound sensor that set up in the protection casing, thereby in time discover the trouble from the ability, guarantee the safety of operation equipment.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides a converter connection structure among power consumption system of power plant, includes motor shaft, fan axle, diaphragm coupling to and independently support aloft through support piece, and cover and establish motor shaft, fan axle and diaphragm coupling's protection casing, the motor end wheel hub and the motor shaft hookup of diaphragm coupling, the fan end wheel hub and the fan axle hookup of diaphragm coupling, the inside of protection casing is provided with axle vibration sensor and sound sensor.

By adopting the technical scheme, the motor shaft and the fan shaft are connected through the diaphragm coupling, additional bearing supports and shaft sleeves are not required to be added, and the eccentric problem caused by human factors during maintenance can be reduced; can protect the motor shaft through the protection casing that increases, fan axle and diaphragm coupling, reduce dust, debris and personnel's counter shaft safe operation's influence, the protection casing independently supports, can not contact each other with fan and motor, vibration sensor and sound transducer through inside setting, can detect the motor shaft respectively, fan axle and diaphragm coupling in service vibration condition and unusual sound, thereby can carry out the analysis according to the data that the sensor detected, judge whether vibration condition and unusual sound belong to normal operating, if not, then can in time discover the trouble, and overhaul the processing to establishing otherwise, reliability and security when guaranteeing motor and fan equipment operation.

The utility model discloses further set up to: the shaft vibration sensor is a non-contact shaft vibration sensor, and the sensing part of the shaft vibration sensor is close to the motor shaft and/or the fan shaft and/or the motor end hub and/or the fan end hub along the radial direction.

By adopting the technical scheme, the non-contact shaft vibration sensor can respectively carry out vibration conditions, mainly amplitude, on the motor shaft, the fan shaft, the motor end hub and the fan end hub, so that whether the motor shaft, the fan shaft and the diaphragm coupling stably operate or not can be judged.

The utility model discloses further set up to: the vibration sensor is an eddy current type displacement sensor.

The utility model discloses further set up to: the protection casing includes the cover body, axle vibration sensor and sound sensor set up in on the inner wall of cover body.

By adopting the technical scheme, the shaft vibration sensor is arranged on the cover body, and the cover body is independently supported, so that the vibration generated when the motor side and the fan side run cannot cause great influence on the cover body, the interference of external vibration on the detection of the shaft vibration sensor can be reduced, the vibration condition results of the fan shaft, the motor shaft and the like detected by the shaft vibration sensor are more accurate, and the results are easy to analyze.

The utility model discloses further set up to: the protective cover further comprises an access hole formed in one side of the cover body, an access cover which is turned outwards relative to the cover body to open the access hole is arranged on the access hole, and the shaft vibration sensor is arranged on the inner wall of the access cover.

Through adopting above-mentioned technical scheme, set up the access hole, can make things convenient for power plant's operation personnel to patrol the key position of motor shaft, fan axle and diaphragm coupling to can make things convenient for the maintainer to overhaul, maintain counter shaft vibration sensor, guarantee the accuracy and the stability of the detection of sensor.

The utility model discloses further set up to: the cover body is provided with a vertical shaft along the side edge of the access hole, and the access cover is rotatably connected to the cover body through the vertical shaft.

Through adopting above-mentioned technical scheme, the access cover conveniently opens the access hole through vertical shaft rotation to the maintainer of being convenient for maintains maintenance and maintenance to the sensor, is favorable to quick troubleshooting, improves the security of equipment operation.

The utility model discloses further set up to: the cover body is provided with a horizontal shaft at the lower edge of the access opening, and the access cover is rotatably connected to the cover body through the horizontal shaft.

Through adopting above-mentioned technical scheme, the access cover passes through the horizontal axis and rotates, opens the access hole after the upset, and the axle vibration sensor on the access cover directly exposes before the maintainer eyes, makes things convenient for the maintainer to maintain it and overhaul, is favorable to quick discharge failure, has improved the security of operation equipment.

The utility model discloses further set up to: the free end of the access cover is connected with the cover body in a buckling mode.

Through adopting above-mentioned technical scheme, through the mode that the buckle is connected, can make the access cover lid close the access hole and lock, avoid the maloperation or avoid debris to enter into the protection casing inside.

The utility model discloses further set up to: the support piece comprises a plurality of support legs, one ends of the support legs are connected to the lower end of the cover body, and the other ends of the support legs are supported on the horizontal ground.

The utility model discloses further set up to: the top of cover body is provided with the fault indicator for send out the warning when detecting that axle abnormal vibration and/or axle operation sound are unusual.

Through adopting above-mentioned technical scheme, the fault indicator can send direct warning when detecting all abnormal vibration or axle operation sound unusual to can remind operation personnel or maintainer to confirm fast and overhaul the trouble.

To sum up, the utility model discloses a beneficial technological effect does:

1. the utility model discloses demolish the liquid coupling to couple fan shaft and motor shaft through the diaphragm coupling, do not add bearing support and axle sleeve, the eccentric problem that the manpower caused when reducible overhauls, speed governing efficiency greatly increased before comparing after the energy-conserving transformation, energy-conserving effect is showing; in addition, the vibration condition and abnormal sound of the motor shaft, the fan shaft and the diaphragm coupling in the running process can be respectively detected through the shaft vibration sensor and the sound sensor; therefore, the vibration detection device can analyze data detected by the sensor and judge whether the vibration condition and the abnormal sound belong to normal operation or not; the additionally arranged independently supported protective cover can reduce the influence of vibration on the detection precision of the sensor when the motor and the fan run, improve the detection accuracy and facilitate the safe and stable operation of equipment;

2. the vibration sensor and the sound sensor are arranged on the inner wall of the access cover, so that the sensor equipment can be conveniently maintained and overhauled; meanwhile, the structural arrangement is favorable for rapidly removing faults when the sensor fails.

Drawings

Fig. 1 is a schematic structural diagram of a frequency converter connection structure in an electric system of a power plant of the present invention.

Fig. 2 is a structural side view of the frequency converter connection structure in the power consumption system of the power plant of the present invention.

Fig. 3 is a schematic view showing the state that the access cover of the present invention is turned outward and opened.

Fig. 4 is a schematic structural view of the mounting assembly of the present invention.

Fig. 5 is a schematic plan view of an access cover in an example of the invention flipped over with a horizontal axis.

Fig. 6 is a schematic plan view of an access cover in another example of the invention, flipped about a vertical axis.

Reference numerals: 1. a motor shaft; 2. a fan shaft; 3. a diaphragm coupling; 31. a fan-end hub; 32. a motor-end hub; 4. a protective cover; 41. a cover body; 42. an access cover; 43. an access hole; 5. supporting legs; 51. the supporting legs 51; 6. a shaft vibration sensor; 7. a sound sensor; 8. mounting the component; 81. a support plate; 82. a connecting plate; 821. bolt holes; 83. a fixing plate; 831. mounting holes; 9. a horizontal axis; 10. a vertical axis; 11. a hook plate; 12. a retaining ring; 13. and a fault indicator lamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a converter connection structure among power consumption system of power plant, as shown in fig. 1, including motor shaft 1, fan axle 2 and diaphragm coupling 3, diaphragm coupling 3 includes motor end wheel hub 32 and motor end wheel hub 31, and motor shaft 1 couples with motor end wheel hub 32, and fan axle 2 couples with fan end wheel hub 31.

After the liquid coupling is detached, the motor shaft 1 and the fan shaft 2 are directly connected together through the diaphragm coupling 3 without a bearing support and a shaft sleeve, the eccentric problem caused by human factors during maintenance can be reduced, and the rotating speed of the fan is high, so that dynamic balance needs to be carried out, and the dynamic balance grade is G6.

As shown in fig. 2, a protective cover 4 is arranged between the head of the fan shaft 2 and the head of the motor shaft 1, and the protective cover 4 is mainly used for covering the fan shaft 2, the motor shaft 1 and the diaphragm coupling 3 which are arranged below. The protection casing 4 includes cover body 41, and cover body 41 formula structure as an organic whole, top are the curved plate, and two long curb plates along the axis direction are for straight panel, and the lower extreme of two long curb plates is inwards constructed relatively and is formed with the mounting panel, are fixed with support piece on the mounting panel, and support piece includes vertical supporting leg 5 and the supporting legs 51 of supporting leg 5 bottom. The cover body 41 is supported in the air by the support legs 5 and is not connected to the base of the fan end and the motor end, so that the protective cover 4 does not cause large vibration when the motor or the fan operates. The basic function of the protective cover 4 is to separate the shaft from the contact of personnel and simultaneously prevent dust and sundries from falling on the shaft and the shaft coupling to influence the safe operation of the equipment.

A shaft vibration sensor 6 for detecting the radial amplitude of the shaft and a sound sensor 7 for detecting the abnormal sound generated by the shaft and the diaphragm coupling 3 during operation are arranged on the inner wall of the cover body 41. The shaft vibration sensor 6 is arranged on the cover body 41, so that the stability can be kept stronger, and the interference caused by the vibration of the motor or the fan is very small, so that the accuracy of the detection result of the vibration sensor can be ensured.

The shaft vibration sensor 6 is selected from a non-contact vibration sensor, preferably an eddy current type displacement sensor. The eddy current type displacement sensor is a relative non-contact type sensor, and measures the vibration displacement or amplitude of an object by the change of the distance between a sensing part at the end of the sensor and the object to be measured. The eddy current sensor has the advantages of wide frequency range (0-10 kHZ), large linear working range, high sensitivity, non-contact measurement and the like, and is very suitable for vibration measurement of a monitoring rotating shaft in rotary machinery.

The data of the shaft vibration sensor 6 and the sound sensor 7 can be collected through a data collector, the data are connected into a DCS system through a communication cable, the collected data are analyzed through data analysis software, and the running condition of the modified equipment can be monitored in real time.

When the device is installed, due to the limitation of construction quality and installation means, more problems can exist, for example, due to later-stage transformation, after long-time operation, vibration between a fan and a motor can cause certain abrasion on a fan shaft 2, a motor shaft 1 and a diaphragm coupler 3, eccentric abrasion and diaphragm fracture can happen to a coupler bolt hole, and the like can be caused frequently, and further, after liquid coupling is removed, the distance between the fan shaft head and the motor shaft head is longer, so that a middle shaft of the diaphragm coupler 3 is longer, polarization can be caused during high-speed operation, long-time operation can be realized, great abrasion can be easily caused, the vibration is difficult to find at ordinary times, because the vibration can be shielded by a protective cover 4, and operating personnel can judge whether great abnormal sound exists only through ears during patrol, and the problem is difficult to find. As such, the shaft vibration sensor 6 and the sound sensor 7 are disposed at positions mainly concentrated at the motor shaft 1, the fan shaft 2, the fan end hub 31 and the motor end hub 32 of the diaphragm coupling 3, and the shaft vibration sensor 6 can be as close to the shaft surface as possible at the time of mounting.

In order to be able to conveniently maintain counter shaft vibration sensor 6 and sound sensor 7, maintenance and maintenance, corresponding motor shaft 1, fan shaft 2, the maintenance mouth 43 of one-to-one is seted up to the side of the cover body 41 that the fan end wheel hub 31 and the motor end wheel hub 32 of diaphragm coupling 3 correspond, it is connected with access cover 42 to rotate on access cover 43, access cover 42 outwards overturns for cover body 41 through the pivot in order to open access cover 43, the corresponding axle vibration sensor 6 and the sound sensor 7 that detect the position all install on access cover 42's inner face.

As shown in fig. 4, the sensors are connected by a mounting assembly 8, the mounting assembly 8 includes a supporting plate 81, the supporting plate 81 is a horizontal plate, a connecting plate 82 perpendicular to the supporting plate 81 is integrally formed on one end surface of the supporting plate 81, two fixing plates 83 parallel to each other and perpendicular to the bottom surface of the supporting plate 81 are disposed on the upper surface of the supporting plate 8, and a mounting hole 831 is formed on the fixing plate 83 for mounting the shaft vibration sensor 6; the acoustic sensor 7 is also mounted on the upper surface of the support plate 81. The connecting plate 82 is provided with a bolt hole 821 through which the connecting plate 82 can be locked to the inner surface of the access cover 42.

As shown in fig. 3 and 5, in one example, the rotation shaft is a horizontal shaft 9, the horizontal shaft 9 is disposed at the lower edge of the access opening 43, the access cover 42 is turned outward with respect to the cover body 41 by the horizontal shaft 9, the access opening 43 is opened, and maintenance and inspection of the sensor on the inner face of the access cover 42 are performed.

As shown in fig. 6, in another example, the rotating shaft is a vertical shaft 10, the vertical shaft 10 is disposed at a side edge of the access opening 43, and the access cover 42 is turned outward relative to the cover body 41 by the vertical shaft 10.

As shown in fig. 2 and 3, the access cover 42 and the cover body 41 are connected by a snap-fit connection, which may be realized by a conventional snap lock, a snap lock, or the like. The installation positions of the hook plate 11 and the retaining ring 12 are reasonably arranged according to the opening and closing mode of the access opening 43 by the lock catch, the hook plate 11 can be fixedly installed on the cover body 41 on one side of the access opening 43 far away from the rotating shaft, and the retaining ring is correspondingly and fixedly installed on the access cover 42.

As shown in fig. 2 and 3, when the access cover 42 is turned outward to open the access opening 43, the sensor can be turned normally, and when the access cover 42 is turned inward to close the access opening 43, the sensing portion of the end of the shaft vibration sensor 6 can be close to the fan shaft 2, the motor shaft 1, the fan end hub 31 and the motor end hub 32.

A fault indicator lamp 13 is mounted on the top of the cover body 41 for warning when abnormal vibration of the shaft and/or abnormal operation sound of the shaft is detected. The fault indicator lamp 13 can be selected to flash for alarming; also can set up a plurality of fault indicator 13 to according to the warning threshold value of predetermined vibration, abnormal sound, light different colours, thereby can let the operation personnel of patrolling and examining, the personnel on the spot know the trouble fast, and make quick response.

The embodiment of the utility model is an energy-saving reconstruction of the traditional power plant liquid coupling speed regulation mode, the liquid coupling is dismantled, and the fan shaft and the motor shaft are directly connected through the diaphragm coupling, without adding a bearing support and a shaft sleeve, thereby reducing the eccentric problem caused by human factors during maintenance, greatly increasing the speed regulation efficiency after the energy-saving reconstruction compared with the prior art, and having obvious energy-saving effect; the vibration condition and abnormal sound of the motor shaft, the fan shaft and the diaphragm coupling in the running process can be respectively detected through the shaft vibration sensor and the sound sensor; therefore, data analysis can be carried out according to the data detected by the sensor, and whether the vibration condition and the abnormal sound belong to normal operation or not is judged; through setting up the access cover on the safety cover to combine sensor and access cover together, can conveniently maintain the sensor and overhaul, not only convenient but also practical compares in traditional rely on patrolling and examining personnel ear to listen, the hand touches and judges unusually, more can improve the accuracy that detects, is favorable to equipment long-term safety, steady operation.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a converter connection structure among power consumption system of power plant, its characterized in that, includes motor shaft (1), fan axle (2), diaphragm coupling (3) to and support in the sky independently through support piece, and cover and establish motor shaft (1), fan axle (2) and diaphragm coupling (3) protection casing (4), motor end wheel hub (32) and motor shaft (1) hookup of diaphragm coupling (3), fan end wheel hub (31) and fan axle (2) hookup of diaphragm coupling (3), the inside of protection casing (4) is provided with axle vibration sensor (6) and sound sensor (7).

2. The structure for connecting a frequency converter in an electric system for a power plant according to claim 1, characterized in that: the shaft vibration sensor (6) is a non-contact shaft vibration sensor (6), and the sensing part of the shaft vibration sensor (6) is close to the motor shaft (1) and/or the fan shaft (2) and/or the motor end hub (32) and/or the fan end hub (31) along the radial direction.

3. The structure for connecting a frequency converter in an electric system for a power plant according to claim 2, characterized in that: the vibration sensor is an eddy current type displacement sensor.

4. The structure for connecting a frequency converter in an electric system for a power plant according to claim 3, wherein: the protection casing (4) includes cover body (41), axle vibration sensor (6) and sound sensor (7) set up in on the inner wall of cover body (41).

5. The structure for connecting a frequency converter in an electric system for a power plant according to claim 4, wherein: the protection casing (4) still include in access hole (43) that one side of cover body (41) was seted up, be provided with on access hole (43) for cover body (41) outside upset in order to open access hole (43) access cover (42), axle vibration sensor (6) set up in on the inner wall of access cover (42).

6. The structure for connecting a frequency converter in an electric system for a power plant according to claim 5, wherein: the side edge of the access hole (43) on the cover body (41) is provided with a vertical shaft (10), and the access cover (42) is rotatably connected to the cover body (41) through the vertical shaft (10).

7. The structure for connecting a frequency converter in an electric system for a power plant according to claim 5, wherein: a horizontal shaft (9) is arranged on the cover body (41) along the lower edge of the access opening (43), and the access cover (42) is rotatably connected to the cover body (41) through the horizontal shaft (9).

8. The connection structure of frequency converters in power consumption systems of power plants according to claim 6 or 7, characterized in that: the free end of the access cover (42) is in snap connection with the cover body (41).

9. The structure for connecting a frequency converter in an electric system for a power plant according to claim 4, wherein: the supporting piece comprises a plurality of supporting legs (5), one ends of the supporting legs (5) are connected to the lower end of the cover body (41), and the other ends of the supporting legs are supported on the horizontal ground.

10. The structure for connecting a frequency converter in an electric system for a power plant according to claim 5, wherein: and a fault indicator lamp (13) is arranged at the top of the cover body (41) and is used for giving out a warning when abnormal vibration of the shaft and/or abnormal operation sound of the shaft are detected.

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