Drum-shaped filter screen driving device for nuclear power plant
By adopting a drive device with a horizontal reducer and three motors, the vibration and weight unevenness problems of the drum filter drive mechanism are solved, better vibration resistance and equipment redundancy are achieved, the risk of single point failure is reduced, and the stability and reliability of the equipment are improved.
Patent Information
- Application Number
- CN202422837271.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The existing drum filter drive mechanism has problems such as large equipment vibration, uneven weight distribution, and unstable overall center of gravity, which easily cause vibration and wear, and requires the introduction of a commutator to change the direction of torque transmission.
The drive device adopts a horizontal reducer and three motors. The horizontal reducer has three input shafts. The motors are connected to the input shafts one by one. The central axis is consistent with the central axis of the drum filter, eliminating the commutator, reducing parts, lowering the center of gravity and vibration risks.
It achieves better anti-vibration performance, meets equipment redundancy requirements, reduces the vertical size and center of gravity of the device, reduces the risk of single point failure, and improves the stability and reliability of the equipment.
Smart Images
Figure CN223416868U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power plant drum filter screen drive technical field especially relates to a nuclear power plant drum filter screen drive device. BACKGROUND
[0002] The drum filter screen of nuclear power plant is composed of a rotating cylindrical framework structure. Filter screen sheets are installed in the circumferential direction of the framework. Water flows into the drum filter screen from both sides of the end face, and after being filtered through the mesh holes on the screen sheets, it flows to the outside of the drum filter screen. When the drum filter screen rotates, the garbage collected in the garbage bucket and the mesh surface is lifted above the operation platform, and the backwash water sprayed from the outside of the screen sheets is flushed into the drain groove for discharge. The drum filter screen drive mechanism, as the power source of the drum filter screen of the nuclear power plant, indirectly undertakes the important functions of ensuring the heat export of the reactor and the integrity of the core, and is a key equipment in the safety and nuclear safety guarantee link of the cold source of the nuclear power plant.
[0003] The existing drum filter screen drive mechanism generally adopts a vertical worm gear reducer. The vertical reducer is a conventional double-shaft input reducer (with two input shafts). The reducer is installed in a vertical cantilever manner. The drum filter screen drive mechanism has the advantage of small installation area, but the vertical reducer has the problem of poor anti-vibration ability in design. At the same time, the two primary speed reduction mechanisms of the reducer are configured with three motors, which are structurally asymmetric, unevenly distributed in weight, and have unstable overall gravity center, which can further induce problems such as large vibration, abnormal sound, wear, and oil leakage. In summary, the existing drum filter screen drive mechanism has the problem of large equipment vibration, which is not conducive to the long-term stable operation of the drum filter screen. In addition, the existing drum filter screen drive mechanism usually needs to introduce a commutator to change the transmission direction of the torque. SUMMARY
[0004] The technical problem to be solved by the utility model is to provide an improved nuclear power plant drum filter screen drive device.
[0005] The utility model adopts the technical scheme to solve the technical problem: provide a nuclear power plant drum filter screen drive device, it includes horizontal speed reducer, first motor, second motor, third motor, transmission shaft and gear,
[0006] The horizontal speed reducer includes an output shaft, a first input shaft, a second input shaft, and a third input shaft. The first motor is in transmission connection with the first input shaft, the second motor is in transmission connection with the second input shaft, and the third motor is in transmission connection with the third input shaft.
[0007] One end of the transmission shaft is in transmission connection with the output shaft, and the other end of the transmission shaft is connected with the gear. The gear is in meshing connection with the large gear ring on the drum filter screen.
[0008] The central axis directions of the output shaft, the first input shaft, the second input shaft and the third input shaft are all consistent with the central axis direction of the drum filter.
[0009] In some embodiments, the horizontal reducer also includes a housing and a four-stage gear transmission structure arranged in the space defined by the housing; the output shaft, the first input shaft, the second input shaft and the third input shaft are respectively at least partially arranged in the space defined by the housing; the four-stage gear transmission structure is respectively connected to the output shaft, the first input shaft, the second input shaft and the third input shaft.
[0010] In some embodiments, the first motor and the second motor are low-speed motors, and the third motor is a medium-high-speed motor.
[0011] In some embodiments, the first motor and the second motor are symmetrically arranged on opposite sides of the horizontal reducer; the third motor and the first motor are arranged on the same side of the horizontal reducer; or the third motor and the second motor are arranged on the same side of the horizontal reducer.
[0012] In some embodiments, the drum filter driving device of a nuclear power plant further includes a vibration measuring unit at least partially disposed on the horizontal reducer.
[0013] In some embodiments, the vibration measurement unit includes a vibration sensor, a data collector, and a terminal device. The vibration sensor is disposed on the horizontal reducer, and the data collector is connected between the vibration sensor and the terminal device.
[0014] In some embodiments, the vibration sensor is a magnetic vibration sensor.
[0015] In some embodiments, the horizontal reducer further includes a housing, and the output shaft, the first input shaft, the second input shaft, and the third input shaft are respectively at least partially disposed in a space defined by the housing; and the vibration sensor is disposed on the housing.
[0016] In some embodiments, the nuclear power plant drum filter drive device also includes a first coupling connected between the first motor and the first input shaft; and / or, the nuclear power plant drum filter drive device also includes a second coupling connected between the second motor and the second input shaft; and / or, the nuclear power plant drum filter drive device also includes a third coupling connected between the third motor and the third input shaft.
[0017] In some embodiments, the nuclear power plant drum filter driving device further includes a fourth coupling connected between the transmission shaft and the output shaft.
[0018] The present invention has at least the following beneficial effects: a horizontal reducer with three input shafts can meet the requirements for redundancy of nuclear power plant equipment. In addition, the central axis directions of the output shaft, the first input shaft, the second input shaft, and the third input shaft of the horizontal reducer are all consistent with the Y direction of the central axis of the drum filter, which is conducive to reducing its vertical size, thereby lowering the center of gravity of the device and having better anti-vibration performance. Since the central axis direction of the output shaft of the horizontal reducer is consistent with the central axis direction of the drum filter, there is no need to introduce a commutator between the output shaft of the horizontal reducer and the drum filter; and the three motors are directly connected to the three input shafts in a one-to-one correspondence, and there is no need to introduce a commutator between the motor and the input shaft of the horizontal reducer. As a result, the entire drive device can be provided without a commutator, saving components and reducing the risk of single-point failure of the drive device. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments, in which:
[0020] Figure 1 It is a structural schematic diagram of a drum filter driving device for a nuclear power plant in some embodiments of the present invention;
[0021] Figure 2 yes Figure 1 The diagram shows a partially enlarged structural diagram of a drum filter drive device in a nuclear power plant. DETAILED DESCRIPTION
[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that when an element is referred to as being "on" another element, the element can be "directly" or "indirectly" located on the other element, or there may also be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0023] like Figure 1 and Figure 2 As shown, the nuclear power plant drum filter driving device (hereinafter referred to as the driving device) in some embodiments of the present invention includes at least a horizontal reducer 1, a first motor 21, a second motor 22, a third motor 23, a transmission shaft 3 and a gear 4.
[0024] The horizontal speed reducer 1 comprises an output shaft 10, a first input shaft 11, a second input shaft 12 and a third input shaft 13. The first motor 21 is in driving connection with the first input shaft 11, the second motor 22 is in driving connection with the second input shaft 12, and the third motor 23 is in driving connection with the third input shaft 13. That is, the horizontal speed reducer 1 has three input shafts, and three motors as power sources are connected with the three input shafts respectively. The three input shafts can provide multiple power input points for the horizontal speed reducer 1, allowing multiple motors or power sources to drive the horizontal speed reducer 1 simultaneously, so that a lower rotating speed and a higher torque can be obtained at the output shaft 10. However, one of the three motors can also be a backup motor. The horizontal speed reducer 1 with three input shafts can meet the requirement of redundancy of equipment in a nuclear power plant.
[0025] The central axis directions of the output shaft 10, the first input shaft 11, the second input shaft 12 and the third input shaft 13 of the horizontal speed reducer 1 are consistent with the central axis Y direction of the drum screen 6. Thus, compared with a driving device using a worm and gear vertical speed reducer, the driving device using the horizontal speed reducer 1 is beneficial to reduce the vertical dimension of the driving device, thereby reducing the gravity center of the device and having better anti-vibration performance. Moreover, after the horizontal speed reducer 1 is used, the central axis direction of the output shaft 10 of the horizontal speed reducer 1 can be consistent with the central axis Y direction of the drum screen 6, so that a commutator between the speed reducer and the drum screen 6 can be omitted. Moreover, the three motors are directly connected with the three input shafts one by one, and a commutator between the motors and the input shafts is also not needed. Thus, the entire driving device can be free of commutators, thereby saving parts and reducing the risk of single-point failure of the driving device.
[0026] In addition, support structures can be arranged between the horizontal speed reducer 1 and the placement surface, between the first motor 21 and the placement surface, between the second motor 22 and the placement surface, and between the third motor 23 and the placement surface, so as to further reduce the vibration of the horizontal speed reducer 1 and the motors.
[0027] One end of the transmission shaft 3 is in driving connection with the output shaft 10, and the other end of the transmission shaft 3 is connected with the gear 4. The drum screen 6 is provided with a large gear ring 5 extending along the circumferential direction of the drum screen 6. The gear 4 is in meshing connection with the large gear ring 5 on the drum screen 6. Thus, the three motors can be used to input torque to the horizontal speed reducer 1 through the three input shafts respectively, the horizontal speed reducer 1 can reduce the rotating speed through the internal speed reduction mechanism, increase the torque, and output the torque to the transmission shaft 3 through the output shaft 10, the transmission shaft 3 drives the gear 4 to rotate, and the gear 4 drives the drum screen 6 to rotate.
[0028] In summary, the horizontal reducer 1 with three input shafts can meet the redundancy requirements of nuclear power plant equipment. Furthermore, the central axis directions of the output shaft 10, first input shaft 11, second input shaft 12, and third input shaft 13 of the horizontal reducer 1 are all aligned with the central axis Y of the drum filter 6, which helps reduce its vertical dimensions, thereby lowering the center of gravity of the device and providing better vibration resistance. Because the central axis direction of the output shaft 10 of the horizontal reducer 1 is aligned with the central axis Y of the drum filter 6, there is no need for a commutator between the output shaft 10 of the horizontal reducer 1 and the drum filter 6. Furthermore, the three motors are directly connected to the three input shafts in a one-to-one correspondence, eliminating the need for a commutator between the motors and the input shafts of the horizontal reducer 1. As a result, the entire drive device can be commutated, saving components and reducing the risk of single-point failures in the drive device.
[0029] like Figure 2 As shown, in some embodiments, the horizontal reducer 1 further includes a housing 14 and a four-stage gear transmission structure (not shown) disposed within the space defined by the housing 14. The output shaft 10, the first input shaft 11, the second input shaft 12, and the third input shaft 13 are each at least partially disposed within the space defined by the housing 14. For example, the output shaft 10 may be entirely disposed within the space defined by the housing 14; alternatively, the output shaft 10 may be partially disposed within the space defined by the housing 14, with a portion extending outside the housing 14. The same principle applies when the output shaft 10 is replaced with the first input shaft 11, the second input shaft 12, or the third input shaft 13.
[0030] The four-stage gear transmission structure is respectively connected to the output shaft 10, the first input shaft 11, the second input shaft 12 and the third input shaft 13. Specifically, the four-stage gear transmission structure includes at least four gear 4 pairs. Each gear 4 pair includes a pair (i.e., two) of meshing reduction gears, and corresponds to a reduction stage. The four meshing gear 4 pairs can realize four independent reduction stages. The output shaft 10, the first input shaft 11, the second input shaft 12 and the third input shaft 13 are respectively connected to a reduction gear. The number of reduction gears can vary according to the specific design of the reducer and the arrangement of the gears 4, and is not limited here. In this embodiment, the horizontal reducer 1 is a three-axis input, four-stage transmission reducer, which can obtain a lower speed and higher torque at the output shaft 10, and is suitable for driving large equipment such as the drum filter 6.
[0031] In some embodiments, the first motor 21 and the second motor 22 are low-speed motors, and the third motor 23 is a medium-high-speed motor. The first motor 21 and the second motor 22 are symmetrically arranged on opposite sides of the horizontal reducer 1. The third motor 23 and the first motor 21 are arranged on the same side of the horizontal reducer 1. Alternatively, in other embodiments, the third motor 23 and the second motor 22 can be arranged on the same side of the horizontal reducer 1. Among them, one of the first motor 21 and the second motor 22 can serve as a backup motor. The first motor 21, the second motor 22, and the third motor 23 can all work simultaneously, or only two or one of them can work.
[0032] like Figure 1 and Figure 2 As shown, in some embodiments, the drive device further includes a vibration measurement unit at least partially mounted on the horizontal reducer 1. The vibration measurement unit includes a vibration sensor 71, a data collector 72, and a terminal device 73. The vibration sensor 71 is mounted on the horizontal reducer 1, and the data collector 72 is connected between the vibration sensor 71 and the terminal device 73. Specifically, the data collector 72 and the vibration sensor 71 can be connected via a cable, where the vibration sensor 71 collects vibration data from the reducer and transmits it to the data collector 72. The data collector 72 and the terminal device 73 can also be connected via a cable or wirelessly. For example, a wireless router can be provided between the data collector 72 and the terminal device 73 to facilitate data transmission. The terminal device 73 can be an electronic device such as a computer or mobile phone, equipped with corresponding software for receiving the vibration data collected by the data collector 72. In other embodiments, the vibration measurement unit can also include a vibrometer mounted on the horizontal reducer 1. The vibration measurement unit can monitor the vibration of the horizontal reducer 1 in real time, providing objective data support for the operating status of the horizontal reducer 1 and thus visualizing the operating status of the drive device.
[0033] Furthermore, in some embodiments, the vibration sensor 71 is a magnetic vibration sensor. The magnetic vibration sensor can be directly adsorbed on the housing 14 of the horizontal reducer 1, and its position on the horizontal reducer 1 can be easily moved. Of course, the vibration sensor 71 is not limited to a magnetic vibration sensor. In other embodiments, the vibration sensor 71 can also be a patch vibration sensor 71 or other forms of vibration sensor 71.
[0034] like Figure 1 and Figure 2As shown, in some embodiments, the apparatus further includes a first coupling 81 connected between the first motor 21 and the first input shaft 11, a second coupling 82 connected between the second motor 22 and the second input shaft 12, a third coupling 83 connected between the third motor 23 and the third input shaft 13, and a fourth coupling 84 connected between the transmission shaft 3 and the output shaft 10. These couplings are used to transmit torque between the motors and the input shafts, or between the transmission shaft 3 and the output shaft 10, and facilitate the disassembly and assembly of the motors and the transmission shaft 3, thereby facilitating equipment maintenance.
[0035] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.
Claims
1. A drum filter driving device for a nuclear power plant, characterized in that: It comprises a horizontal reducer (1), a first motor (21), a second motor (22), a third motor (23), a transmission shaft (3) and a gear (4); The horizontal reducer (1) comprises an output shaft (10), a first input shaft (11), a second input shaft (12) and a third input shaft (13); the first motor (21) is transmission-connected to the first input shaft (11), the second motor (22) is transmission-connected to the second input shaft (12), and the third motor (23) is transmission-connected to the third input shaft (13); One end of the transmission shaft (3) is in transmission connection with the output shaft (10), and the other end of the transmission shaft (3) is connected to the gear (4), and the gear (4) is meshed with the large gear ring (5) on the drum filter; The central axis directions of the output shaft (10), the first input shaft (11), the second input shaft (12) and the third input shaft (13) are all consistent with the central axis (Y) direction of the drum filter.
2. The drum filter driving device for a nuclear power plant according to claim 1, characterized in that: The horizontal reducer (1) further includes a housing (14) and a four-stage gear transmission structure arranged in a space defined by the housing (14); The output shaft (10), the first input shaft (11), the second input shaft (12), and the third input shaft (13) are respectively at least partially disposed in a space defined by the housing (14); The four-stage gear transmission structure is respectively connected to the output shaft (10), the first input shaft (11), the second input shaft (12) and the third input shaft (13).
3. The drum filter driving device for a nuclear power plant according to claim 1, characterized in that: The first motor (21) and the second motor (22) are low-speed motors, and the third motor (23) is a medium-high-speed motor.
4. The drum filter driving device for a nuclear power plant according to claim 3, characterized in that: The first motor (21) and the second motor (22) are symmetrically arranged on opposite sides of the horizontal reducer (1); The third motor (23) and the first motor (21) are arranged on the same side of the horizontal reducer (1); or the third motor (23) and the second motor (22) are arranged on the same side of the horizontal reducer (1).
5. The drum filter driving device for a nuclear power plant according to claim 1, characterized in that: The nuclear power plant drum filter driving device further comprises a vibration measuring unit which is at least partially arranged on the horizontal reducer (1).
6. The drum filter driving device for a nuclear power plant according to claim 5, characterized in that: The vibration measuring unit comprises a vibration sensor (71), a data collector (72) and a terminal device (73); the vibration sensor (71) is arranged on the horizontal reducer (1); and the data collector (72) is connected between the vibration sensor (71) and the terminal device (73).
7. The drum filter driving device for a nuclear power plant according to claim 6, characterized in that: The vibration sensor (71) is a magnetic vibration sensor.
8. The drum filter driving device for a nuclear power plant according to claim 6, characterized in that: The horizontal reducer (1) further comprises a housing (14), wherein the output shaft (10), the first input shaft (11), the second input shaft (12), and the third input shaft (13) are respectively at least partially arranged in a space defined by the housing (14); The vibration sensor (71) is arranged on the housing (14).
9. The drum filter driving device for a nuclear power plant according to claim 1, characterized in that: The nuclear power plant drum filter driving device further includes a first coupling (81) connected between the first motor (21) and the first input shaft (11); And / or, the nuclear power plant drum filter driving device further comprises a second coupling (82) connected between the second motor (22) and the second input shaft (12); And / or, the nuclear power plant drum filter driving device further comprises a third coupling (83) connected between the third motor (23) and the third input shaft (13).
10. The drum filter driving device for a nuclear power plant according to claim 1, characterized in that: The nuclear power plant drum filter driving device further comprises a fourth coupling (84) connected between the transmission shaft (3) and the output shaft (10).