Electromechanical integration device of water feeding pump

Abstract

The utility model discloses a feed pump electromechanical integration device, and relates to the technical field of steam turbine generator units, the feed pump electromechanical integration device comprises a booster pump, a feed pump and a speed regulation assembly, the feed pump is coaxially connected with the booster pump; the speed regulation assembly is connected with a main shaft of the water feeding pump, is parallel to the main shaft at an interval and comprises at least one servo motor, and an output shaft of the servo motor is connected with the main shaft of the water feeding pump and can regulate the rotating speed of the main shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam turbine generator unit technical field, especially relate to a water pump electromechanical integration device. BACKGROUND

[0002] In steam turbine generator unit, pre pump and water pump bear important roles respectively, pre pump and water pump work cooperatively in steam turbine generator unit, pre pump prevents cavitation by improving the pressure of water pump entrance, ensures the stable operation of water pump, and water pump sends high pressure water to boiler, satisfies the water demand of boiler, and guarantees the efficient and safe operation of entire power generation system.

[0003] The existing steam turbine generator unit sets up electromechanical integration device by integrating pre pump and water pump, realizes the accurate control of the rotation speed, flow, pressure and other parameters of water pump by accurate control algorithm and efficient transmission mechanism, so as to improve the operation efficiency and reliability of system, and reduce maintenance cost and downtime. UTILITY MODEL CONTENT

[0004] The utility model discloses a water pump electromechanical integration device, aims at improving the compactness of pre pump and water pump installation, and reducing the space required for installation.

[0005] To realize the above-mentioned purpose, the water pump electromechanical integration device provided by the utility model comprises:

[0006] Pre pump;

[0007] Water pump, the water pump is coaxial with the pre pump Connection;

[0008] Speed regulation component, the speed regulation component connects the main shaft of water pump, and is arranged in parallel with the main shaft interval, the speed regulation component includes at least one servo motor, the output shaft of servo motor is connected with the main shaft of water pump, and the rotation speed of main shaft can be adjusted.

[0009] In an embodiment, the number of servo motors includes two, each servo motor is symmetrically arranged on both sides of the main shaft, and each servo motor is connected with the main shaft.

[0010] In an embodiment, the speed regulation component further comprises a planetary gear set, the planetary gear set comprises a sun gear and a plurality of planet gears, each planet gear is meshed and connected with the sun gear, the sun gear is sleeved on the main shaft of the water pump, and one planet gear is connected to the output end of one servo motor.

[0011] In an embodiment, the speed regulating assembly further comprises a transmission idler wheel, which is arranged between the sun gear and the planetary gear, and meshes with the sun gear and the planetary gear respectively to adjust the rotation direction of the main shaft.

[0012] In an embodiment, the servo motor is arranged above the transmission idler wheel.

[0013] In an embodiment, the planetary gear shaft, the servo motor and the transmission idler wheel shaft are all rolling bearings.

[0014] In an embodiment, the water supply pump electromechanical integrated device further comprises a housing, which is an integrated cast structure.

[0015] In an embodiment, the water supply pump electromechanical integrated device uses a diaphragm shaft coupling to connect the shafts.

[0016] In an embodiment, the power of the servo motor is 500kw.

[0017] The technical scheme of the utility model discloses a water supply pump electromechanical integrated device, and the core is that the water supply pump, the pre-pump and the speed regulating assembly are integrated together. The water supply pump and the pre-pump are coaxially connected, and this design can ensure that the water flow is smoothly transmitted between the two pumps, improving the overall efficiency of the pump set. The speed regulating assembly is connected to the main shaft of the water supply pump through the servo motor, and is arranged in parallel with the main shaft, and this layout enables the speed regulating assembly to flexibly adjust the rotation speed of the main shaft without interfering with the normal operation of the main shaft. The introduction of the servo motor provides accurate speed control capability for the operation of the pump, and can adjust the output flow and pressure of the pump in real time according to different working condition requirements, so that more efficient and energy-saving operation is realized. In addition, this electromechanical integrated design reduces the use of external transmission devices, reduces the complexity and failure rate of the system, and improves the reliability and maintenance convenience of the entire device. Through this integrated design, accurate control of the water supply pump can be realized, the response speed and operation efficiency of the system are improved, and maintenance cost and downtime are reduced. The water supply pump electromechanical integrated device is compactly integrated, reducing the overall installation space of the device, and facilitating sufficient space for installation and subsequent maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating creative labor.

[0019] Figure 1 A structure schematic view of one embodiment of the water pump electromechanical integrated device is provided in the utility model;

[0020] Figure 2 For Figure 1 The principle view of the water pump electromechanical integrated device is provided in the utility model;

[0021] Figure 3 For Figure 1 The structure schematic view of the speed regulating assembly is provided in the utility model;

[0022] Figure 4 For Figure 3 The principle view of the speed regulating assembly is provided in the utility model.

[0023] Explanation of the attached drawings:

[0024] 1000, water pump electromechanical integrated device, 1, front pump, 2, water pump, 3, speed regulating assembly, 31, servo motor, 32, planetary gear set, 321, sun gear, 322, planet wheel, 4, shell.

[0025] The utility model realizes the purpose, functional characteristics and advantages, which will be further described with reference to the attached drawings. Specific implementation

[0026] The technical scheme in the utility model embodiments will be clearly and completely described with reference to the attached drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] It should be noted that if the utility model embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0028] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0029] In the steam turbine generator set, the pre-pump and the feed pump each play an important role, the pre-pump and the feed pump work together in the steam turbine generator set, the pre-pump prevents cavitation by increasing the pressure at the inlet of the feed pump, and ensures the stable operation of the feed pump, and the feed pump delivers high-pressure feed water to the boiler to meet the water demand of the boiler and ensure the efficient and safe operation of the entire power generation system.

[0030] The existing steam turbine generator set integrates the pre-pump and the feed pump into a mechatronic device, which realizes accurate control of the speed, flow, pressure and other parameters of the feed pump through accurate control algorithm and efficient transmission mechanism, so as to improve the operation efficiency and reliability of the system, and reduce the maintenance cost and downtime. The existing integrated device is mainly realized by the transmission connection of the pre-pump and the feed pump through the fluid coupling, and the installation space required by the overall device is large, which is not convenient for installation and subsequent maintenance.

[0031] To solve the above problems, the utility model provides a kind of feed pump 2 mechatronic device 1000, including pre-pump 1, feed pump 2 and speed regulation component 3, feed pump 2 is coaxially connected with pre-pump 1;Speed regulation component 3 is connected with the main shaft of feed pump 2, and is arranged in parallel with the main shaft, and speed regulation component 3 includes at least one servo motor 31, the output shaft of servo motor 31 is connected with the main shaft of feed pump 2, and the speed of main shaft can be adjusted.

[0032] The utility model discloses a technical scheme puts forward a water supply pump 2 mechatronic device 1000, and its core lies in the integration of water supply pump 2, front pump 1 and speed regulation component 3. Water supply pump 2 is coaxially connected with front pump 1, and this design can ensure that water flow is smoothly transferred between the two pumps, and improves the overall efficiency of the pump set. Speed regulation component 3 is connected to the main shaft of water supply pump 2 through servo motor 31, and is arranged in parallel with the main shaft, and this layout makes speed regulation component 3 can flexibly adjust the speed of the main shaft without interfering with the normal operation of the main shaft. The introduction of servo motor 31 provides accurate speed control capability for the operation of the pump, and can adjust the output flow and pressure of the pump in real time according to different working condition requirements, so as to realize more efficient and energy-saving operation. In addition, this mechatronic design reduces the use of external transmission devices, reduces the complexity and failure rate of the system, and improves the reliability and maintenance convenience of the whole device. Through this integrated design, accurate control of water supply pump 2 can be realized, the response speed and operating efficiency of the system are improved, and maintenance cost and downtime are reduced. The whole water supply pump 2 mechatronic device 1000 is compact and integrated, which reduces the overall installation space of the device, and facilitates sufficient space for installation and subsequent maintenance.

[0033] In an optional embodiment, to facilitate the speed regulation of the main shaft of the feed water pump 2, the number of servo motors 31 includes two, each servo motor 31 is symmetrically arranged on both sides of the main shaft, and each servo motor 31 is connected with the main shaft. This symmetrical arrangement can ensure that the main shaft is more evenly stressed when driven by the two servo motors 31, thereby reducing the vibration and deflection of the main shaft during operation. Since the two servo motors 31 jointly undertake the task of regulating the speed of the main shaft, compared with a single servo motor 31, they can provide a larger torque output range and more precise speed regulation accuracy, so that the feed water pump 2 can operate stably under a wider range of working conditions. At the same time, the symmetrically arranged servo motors 31 are more compact in structure, which is conducive to the miniaturization and integration design of the entire device, saves installation space, and improves space utilization. In addition, when one of the servo motors 31 fails, the other servo motor 31 can still maintain basic operation function, providing a guarantee for emergency operation of the system and enhancing the redundancy and reliability of the device. Through this symmetrical design, the stability and reliability of the system can be improved, the downtime caused by single-point failure can be reduced, and the overall performance and efficiency of the system can be improved. Specifically, the servo motor 31 in the present embodiment is a 3000v, 500kw four-stage special motor. This high-voltage, high-power servo motor 31 has strong driving capability and can provide sufficient torque output for the main shaft of the feed water pump 2, meeting the operation requirements of large feed water pumps 2 under high-lift and large-flow working conditions. It has the advantages of small size and light weight, so it can be suitable for compact design. At the same time, the length of the servo motor 31 is greatly reduced, which is convenient for the arrangement of the cooling fan of the servo motor 31.

[0034] In an optional embodiment, the speed regulating assembly 3 further comprises a planetary gear set 32, which includes a sun gear 321 and a plurality of planet gears 322, each planet gear 322 being meshingly connected with the sun gear 321, the sun gear 321 being sleeved on the main shaft of the feed water pump 2, and one planet gear 322 being connected with the output end of a servo motor 31. The planetary gear set 32 provides an efficient transmission mode for the speed regulating system. Through the meshing transmission between the planet gears 322 and the sun gear 321, a wide range of speed regulation can be achieved, so that the main shaft of the feed water pump 2 can operate stably at different speeds to adapt to various complex working conditions. In addition, the planetary gear set 32 has high transmission efficiency, which can reduce energy loss while transmitting large torque, and improve the energy efficiency of the entire device. Moreover, the planetary gear set 32 has a compact structure, which can realize complex transmission functions in limited space, further optimizing the overall layout of the electromechanical integrated device 1000 of the feed water pump 2. At the same time, the multi-stage transmission characteristics of the planetary gear set 32 can also subdivide the output speed of the servo motor 31, achieving more accurate and smooth speed regulation, improving the performance and operation quality of the device. Through the design of the planetary gear set 32, a wider speed regulation range can be achieved, improving the energy efficiency and operation stability of the system, while optimizing the space layout and improving the overall performance. When regulating the speed, the torque of the servo motor 31 is input from the planet gear 322 and output from the sun gear 321, and the two servo motors 31 drive the planet gears 322 to rotate; when increasing the speed, the rotation direction of the servo motor 31 remains the same as that of the planet gear 322 to provide speed-up for it, thereby increasing the speed of the main shaft of the feed water pump 2, and when reducing the speed, the planet gears 322 increase the resistance (at this time, the servo motor 31 becomes a generator, and the generated power is input to the main motor after rectification), to achieve the purpose of regulating the speed of the feed water pump 2.

[0035] Further, the speed regulating assembly 3 also includes a transmission idler wheel, which is arranged between the sun gear 321 and the planet gear 322 and meshes with the sun gear 321 and the planet gear 322 respectively to adjust the steering of the main shaft. The transmission idler wheel can play a role of transition and adjustment between the sun gear 321 and the planet gear 322. On the one hand, the transmission idler wheel can change the direction of power transmission, so that the steering of the main shaft can be adjusted according to actual needs, increasing the flexibility and adaptability of the device. For example, in some special working conditions, it may be necessary to change the water outlet direction of the water supply pump 2 or adapt to different pipeline layouts, and the transmission idler wheel can achieve this purpose by changing the transmission direction. On the other hand, the transmission idler wheel can also buffer the impact and vibration between the sun gear 321 and the planet gear 322 to some extent, improving the transmission stability and service life of the gear set. In addition, the addition of the transmission idler wheel can also increase the transmission ratio range of the transmission system, so that the speed regulating assembly 3 can realize more extensive speed regulation, further improving the performance and application range of the water supply pump 2 electromechanical integrated device 1000. Through the design of the transmission idler wheel, more flexible steering control can be achieved, vibration and impact can be reduced, the transmission stability and service life of the system can be improved, and the speed regulation range can be expanded, enhancing the adaptability and performance of the system.

[0036] In an optional embodiment, in order to further reduce the installation space of the water supply pump 2 electromechanical integrated device 1000, the servo motor 31 is located above the transmission idler wheel. This upper and lower stacking layout has many advantages. First, from the perspective of structural stability, placing the servo motor 31 above the transmission idler wheel can make the center of gravity of the entire speed regulating assembly 3 more reasonable, reducing the risk of shaking and tilting of the device, especially in high-speed operation or under external impact, better stability can be maintained. Second, from the perspective of heat dissipation performance, the servo motor 31 will generate heat during operation, placing it above is beneficial to heat dissipation, avoiding overheating caused by heat accumulation at the bottom, thereby prolonging the service life of the servo motor 31 and improving the reliability of the system. Third, this layout facilitates the installation and maintenance of the servo motor 31, as the space above is relatively spacious, making it easier for operators to disassemble, replace and maintain the servo motor 31, reducing maintenance costs and time, and also reducing the overall installation space required by the water supply pump 2 electromechanical integrated device 1000. At the same time, the position above is also conducive to the connection of the servo motor 31 with the external control system, signal transmission is more stable, signal interference and transmission loss are reduced, and the control accuracy and response speed of the entire system are improved. Through this upper and lower stacking layout, the stability and heat dissipation performance of the system can be improved, maintenance and installation are facilitated, signal transmission is optimized, and the overall performance and reliability of the system are improved.

[0037] In an optional embodiment, to facilitate the connection between the shaft and the shaft in the electromechanical integrated device 1000 of the feed water pump 2, the planetary gear 322 shaft, the servo motor 31 and the transmission idler shaft all adopt rolling bearings. Rolling bearing is a high-efficiency bearing type, which is composed of rolling elements and retainers inside, and realizes the relative movement between the shaft and the shaft seat through rolling friction. The use of rolling bearings on the planetary gear 322 shaft, the servo motor 31 and the transmission idler shaft can significantly reduce the frictional resistance between the shaft and the bearing, thereby reducing energy loss, improving transmission efficiency, reducing lubrication of the gear shaft affected by gravity from the vertical direction. At the same time, the rolling bearing has good load-carrying capacity and fatigue resistance, and can maintain stable operation under high-speed operation and large load working conditions, prolonging the service life of the shaft and the bearing. In addition, the structure of the rolling bearing is compact, easy to install and remove, and can be quickly replaced and maintained, reducing downtime and improving equipment operation efficiency. Moreover, the precision of the rolling bearing is high, which can ensure the coaxiality and rotation accuracy of the shaft, making the whole transmission system run more smoothly, reducing vibration and noise, and improving the operation quality of the device and the comfort of the working environment. Through the design of rolling bearings, the transmission efficiency and operation stability of the system can be improved, the maintenance cost and downtime can be reduced, and the operation quality can be optimized, improving the overall performance.

[0038] In an optional embodiment, the electromechanical integrated device 1000 of the feed water pump 2 further comprises a shell 4, which is an integral cast structure. From the aspect of structural strength, integral casting can ensure the integrity and firmness of the shell 4, without joint gaps, so as to withstand greater external pressure and impact force, protecting the internal pump group and speed regulating assembly 3 from damage. The servo motor 31 is installed above the shell, and the integral shell provides a reliable and stable support foundation for the servo motor 31. The thickness of the shell is 20mm, which is higher in strength than the welded shell, improving the stability of the electromechanical integrated device 1000 of the feed water pump 2. Secondly, the sealing performance of the integral cast shell 4 is better, which can effectively prevent dust, moisture and other impurities from entering the inside of the device, and play a good protective role for the internal mechanical parts and electrical elements, prolonging the service life of the device. Thirdly, the production process of the integral cast shell 4 is relatively simple, with high forming precision, which can ensure the size and shape consistency of the shell 4, and is conducive to improving the assembly precision and quality stability of the device. At the same time, this shell 4 design is also convenient for surface treatment and corrosion prevention treatment, which can select appropriate coating materials according to different use environment requirements, enhance the corrosion resistance and weather resistance of the shell 4. In addition, the integral cast shell 4 has a more neat and beautiful appearance, improving the overall image and market competitiveness of the product. Through the design of the integral cast shell 4, the structural strength and sealing performance of the device can be improved, the production process can be simplified, the assembly precision and quality stability can be improved, and the appearance and protection performance can be optimized.

[0039] In an optional embodiment, a diaphragm coupling is used to connect the shafts in the water supply pump 2 electromechanical integrated device 1000. The diaphragm coupling is a high-performance flexible coupling that mainly relies on the elastic deformation of the metal diaphragm to compensate for the relative displacement between the two shafts. In the water supply pump 2 electromechanical integrated device 1000, there is a certain installation error and displacement caused by thermal expansion during operation between the shafts, and the diaphragm coupling can effectively absorb these displacements to ensure the stability of the connection between the shafts and the reliability of the transmission. At the same time, the diaphragm coupling has high torque transmission capacity and can work stably under large torque conditions to meet the operation requirements of the water supply pump 2 and the speed regulating assembly 3. In addition, the diaphragm coupling does not need to be lubricated, has low maintenance cost, and has good shock absorption performance, which can reduce the transmission of vibration between the shafts, reduce noise, and improve the running stability and comfort of the entire device. Moreover, the diaphragm coupling has a compact structure and is easy to install, which can realize effective connection between the shafts in a limited space, is conducive to the miniaturization and integration design of the device, and further optimizes the overall performance and layout of the water supply pump 2 electromechanical integrated device 1000. Through the design of the diaphragm coupling, the connection stability and transmission reliability of the system can be improved, the maintenance cost can be reduced, the running stability and space layout can be optimized, and the overall performance can be improved.

[0040] The above only describes the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application is included in the patent protection scope of the present application.

Claims

1. A water supply pump electromechanical integrated device characterized by, The utility model relates to a water supply pump electromechanical integration device, which comprises the following components: a front pump; a water supply pump coaxially connected with the front pump; a speed regulation assembly connected with a main shaft of the water supply pump and arranged in parallel with the main shaft at intervals, the speed regulation assembly comprising at least one servo motor, an output shaft of the servo motor being connected with the main shaft and capable of adjusting the rotating speed of the main shaft.

2. The water supply pump electromechanical integrated device according to claim 1, wherein The number of servo motors comprises two, each servo motor being symmetrically arranged on the two sides of the main shaft, and each servo motor being connected with the main shaft.

3. The water supply pump electromechanical integrated device according to claim 2, wherein The speed regulation assembly further comprises a planetary gear set, the planetary gear set comprising a sun gear and a plurality of planet gears, each planet gear being meshingly connected with the sun gear, the sun gear being sleeved on the main shaft of the water supply pump, and one planet gear being connected with the output end of one servo motor.

4. The water supply pump electromechanical integrated device according to claim 3, wherein The speed regulation assembly further comprises a transmission idler, the transmission idler being arranged between the sun gear and the planet gears and being meshed with the sun gear and the planet gears respectively to adjust the rotating direction of the main shaft.

5. The water supply pump electromechanical integrated device according to claim 4, wherein The servo motor is located above the transmission idler.

6. The water supply pump electromechanical integrated device according to claim 5, wherein Rolling bearings are adopted for the axes of the planet gears, the servo motors, and the transmission idler.

7. The water supply pump electromechanical integrated device according to any one of claims 1 to 6, characterized by The water supply pump electromechanical integration device further comprises an outer shell, the outer shell being of an integrated casting structure.

8. The water supply pump electromechanical integrated device according to claim 7, wherein Membrane shaft couplings are adopted for connecting the shafts in the water supply pump electromechanical integration device.

9. The water supply pump electromechanical integrated device according to claim 1, wherein The power of the servo motor is 500 kw.

Images