CN215927794U - Energy-saving circulating water pump for thermal power generating unit - Google Patents
Energy-saving circulating water pump for thermal power generating unit Download PDFInfo
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- CN215927794U CN215927794U CN202121439526.1U CN202121439526U CN215927794U CN 215927794 U CN215927794 U CN 215927794U CN 202121439526 U CN202121439526 U CN 202121439526U CN 215927794 U CN215927794 U CN 215927794U
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Abstract
The utility model discloses an energy-saving circulating water pump for a thermal power generating unit, which comprises a suction flared tube and a pump body, wherein flow guide shells are fixedly arranged on two sides of the suction flared tube, a lower shaft sleeve is fixedly arranged at one end of the surface of the pump shaft through a set screw and a fixed key, a lower guide bearing is sleeved on the outer surface of the lower shaft sleeve, an upper shaft sleeve is fixedly arranged at the other end of the surface of the pump shaft, an upper guide bearing is sleeved on the surface of the upper shaft sleeve, a motor support is fixedly provided with a pump seat through an external flange, and a coupling component is fixedly arranged at the other end of the pump shaft. The utility model minimizes the loss of liquid flowing through the guide shell, reduces the volume loss, improves the pump efficiency, reduces the friction loss, improves the pump efficiency, reduces the pressure grade of a system valve, has wide high-efficiency area of the pump body, ensures that the high-speed and low-speed working conditions of the pump all run in the high-efficiency area, improves the running efficiency of a unit, improves the efficiency of the pump body, reduces the output power of the pump body, reduces the energy consumption and saves the electricity consumption.
Description
Technical Field
The utility model relates to the technical field of thermal power generating units, in particular to an energy-saving circulating water pump for a thermal power generating unit.
Background
The circulating water pump is an important device of a cold end system of the thermal power generating unit and is used as one of auxiliary machines with high power consumption in the thermal power plant, and the electric energy consumed by the circulating water pump accounts for 1% -1.5% of the total power generation of the plant, so that the online monitoring of the running efficiency of the circulating water pump is accurate, and the online monitoring of the running efficiency of the circulating water pump is of great significance to the economic running of the thermal power generating unit. Along with the rapid development of the national electric power industry and the requirements of economic construction, the energy conservation and consumption reduction of a power station are particularly important, a thermal power generating unit occupies a large proportion in China, a circulating water pump is used as an important auxiliary machine of a steam turbine, is key equipment for providing cooling water for a power station operation unit and a cooling device, and is characterized by large flow, high energy consumption and great influence on the operation economy of the unit.
Disclosure of Invention
The utility model aims to provide an energy-saving circulating water pump for a thermal power generating unit, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: an energy-saving circulating water pump for a thermal power generating unit comprises a suction bell-mouthed tube and a pump body, wherein the suction bell-mouthed tube is fixedly installed on one side of the pump body, the middle of the suction bell-mouthed tube is fixedly connected with one end of an impeller through an impeller locking nut, the middle of the impeller is fixedly connected with one end of a pump shaft through an impeller connecting key, guide shells are fixedly installed on two sides of the suction bell-mouthed tube respectively, an inner connecting tube is fixedly installed on one side of each guide shell, a lower shaft sleeve is fixedly installed on one end of the surface of the pump shaft through a set screw and a fixing key, a lower guide bearing is sleeved on the outer surface of each lower shaft sleeve, the other side of each guide shell is fixedly connected with one end of a protective tube, the other end of each protective tube is fixedly communicated with one end of the inner connecting tube, a discharge seat is fixedly installed on the top of one side of each guide shell, an outer connecting tube is fixedly connected with one side of the discharge seat, and an upper shaft sleeve is fixedly installed on the other end of the surface of the pump shaft, the utility model discloses a pump, including last axle sleeve, one side fixed mounting of inner union pipe has sealed letter body, the opposite side fixed mounting of the pump body has motor support, motor support has the pump seat through external flange fixed mounting, the pump shaft is equipped with the sealed packing layer with the junction of last axle sleeve, the other end fixed mounting of pump shaft has the shaft coupling part, one side fixed mounting of shaft coupling part has the connection key, the middle part fixed mounting of shaft coupling part has the adjustment pad.
As a preferable technical solution of the present invention, the impeller is a closed wheel, and the impeller is in a twisted blade shape, and the number of the blades is 5.
As a preferred technical scheme of the utility model, an impeller sealing ring is embedded in the surface of the impeller, a shell sealing ring is embedded in the surface of the guide shell, and the guide shell is in a bowl-shaped structure.
As a preferable technical scheme of the utility model, the impeller is a diagonal flow type single suction impeller, and the surface of the diagonal flow type single suction impeller is provided with a balance hole.
As a preferable technical scheme of the present invention, the impeller, the pump shaft and the guide shell are all withdrawable.
As a preferable technical scheme of the utility model, the lower guide bearing and the upper guide bearing both adopt sialon bearings.
Compared with the prior art, the utility model has the beneficial effects that:
the guide shell with the bowl-shaped structure is arranged, so that the loss of liquid flowing through the guide shell is minimized, the impeller sealing ring is embedded on the surface of the impeller, the volume loss can be reduced, the pump efficiency is improved, the upper guide bearing and the lower guide bearing are all dry-grinding-resistant sialon bearings with small friction coefficients, the friction loss can be reduced, the pump efficiency is improved, the characteristic curve of the pump body tends to stably rise from a guarantee point to a closing point, the pressure grade of a system valve is reduced, the high-efficiency area of the pump body is wide, the high-speed and low-speed working conditions of the pump are guaranteed to operate in the high-efficiency area, the operation efficiency of a unit is improved, the efficiency of the pump body is improved, the output power of the pump body is reduced, the energy consumption is reduced, and the power consumption is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
fig. 2 is a schematic structural view of the impeller of the present invention.
In the figure: 1. a suction flare; 2. an impeller lock nut; 3. an impeller; 4. an impeller connecting key; 5. a pump shaft; 6. a guide shell; 7. an impeller seal ring; 8. a housing seal ring; 9. a lower guide bearing; 10. a lower shaft sleeve; 11. protecting the pipe; 12. a discharge seat; 13. an inner connecting pipe; 14. an external connection pipe; 15. an upper guide bearing; 16. an upper shaft sleeve; 17. sealing the box body; 18. a pump mount; 19. sealing and filling; 20. a motor bracket; 21. a coupling component; 22. a connecting bond; 23. an adjustment pad; 24. and a pump body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the utility model provides an energy-saving circulating water pump for a thermal power generating unit, comprising a suction bell pipe 1 and a pump body 24, wherein one side of the pump body 24 is fixedly provided with the suction bell pipe 1, the middle part of the suction bell pipe 1 is fixedly connected with one end of an impeller 3 through an impeller locking nut 2, the middle part of the impeller 3 is fixedly connected with one end of a pump shaft 5 through an impeller connecting key 4, two sides of the suction bell pipe 1 are fixedly provided with a guide shell 6, one side of the guide shell 6 is fixedly provided with an inner connecting pipe 13, one end of the surface of the pump shaft 5 is fixedly provided with a lower shaft sleeve 10 through a fastening screw and a fixing key, the outer surface of the lower shaft sleeve 10 is sleeved with a lower guide bearing 9, the other side of the guide shell 6 is fixedly connected with one end of a protective pipe 11, the other end of the protective pipe 11 is fixedly communicated with one end of the inner connecting pipe 13, the top of one side of the guide shell 6 is fixedly provided with a spitting seat 12, one side fixedly connected with of spitting out seat 12 is external to take over 14, the other end fixed mounting on pump shaft 5 surface has last axle sleeve 16, the surface cover of going up axle sleeve 16 is equipped with guide bearing 15, one side fixed mounting of inner joint pipe 13 has sealed letter body 17, the opposite side fixed mounting of the pump body 24 has motor support 20, motor support 20 has pump seat 18 through external flange fixed mounting, the junction of pump shaft 5 and last axle sleeve 16 is equipped with sealed packing layer 19, the other end fixed mounting of pump shaft 5 has shaft coupling part 21, one side fixed mounting of shaft coupling part 21 has connect key 22, the middle part fixed mounting of shaft coupling part 21 has adjustment pad 23.
Preferably, the impeller 3 is a closed wheel, the impeller 3 is in a twisted blade shape, the number of the blades is 5, and the blades and the guide shell 6 are combined to form the high-efficiency hydraulic model.
Preferably, the surface of the impeller 3 is inlaid with an impeller sealing ring 7, the surface of the guide shell 6 is inlaid with a shell sealing ring 8, abrasion is prevented, the impeller sealing ring 7 and the shell sealing ring 8 are in reasonable clearance fit to reduce leakage loss of liquid, the guide shell 6 is in a bowl-shaped structure, and the radial size of the pump body 24 is reduced.
Preferably, the impeller 3 may also be a diagonal flow type single suction impeller, and a balancing hole is provided on the surface of the diagonal flow type single suction impeller, and the balancing hole improves the balancing capability of the impeller 3.
Preferably, the impeller 3, the pump shaft 5 and the guide shell 6 are all drawable, and the water pump does not need to be emptied into the water absorption pool for maintenance, so that the maintenance is convenient.
Preferably, the lower guide bearing 9 and the upper guide bearing 15 both adopt sialon bearings, bear radial force of a pump rotor, have small friction coefficient and are resistant to dry grinding, so that friction loss can be reduced, and pump efficiency is improved.
When the suction bell-mouthed pipe pump is used specifically, the suction bell-mouthed pipe 1 is installed on one side of the pump body 24, the impeller 3 is installed in the middle of the suction bell-mouthed pipe 1 through the impeller locking nut 2, the impeller sealing ring 7 is embedded on the surface of the impeller 3, the pump shaft 5 is installed in the middle of the impeller 3 through the impeller connecting key 4, the guide shell 6 is installed on two sides of the suction bell-mouthed pipe 1, the inner connecting pipe 13 is installed on one side of the guide shell 6, the shell sealing ring 8 is embedded on the surface of the guide shell 6, abrasion is prevented, and the impeller sealing ring is used for sealing ring7 and a shell sealing ring 8 reduce the leakage loss of liquid through reasonable clearance fit, the diversion shell 6 is in a bowl-shaped structure, the radial size of a pump body 24 is reduced, when the impeller 3 is a closed wheel and the number of blades of the impeller 3 is 5, the shape of the blades is a twisted shape, the blades are combined with the diversion shell 6 to form a high-efficiency hydraulic model, when the impeller 3 is a diagonal flow type single suction impeller which is provided with a balance hole and front and rear sealing rings, the efficiency of the pump shaft 5 can be improved, the impeller 3, the pump shaft 5 and the diversion shell 6 are all drawable, the water pump is overhauled without emptying a water suction pool, the overhaul is convenient, one end of the surface of the pump shaft 5 is provided with a lower shaft sleeve 10 through a set screw and a fixed key, the surface of the lower shaft sleeve 10 is provided with a lower guide bearing 9, the other side of the diversion shell 6 is connected with one end of a protection pipe 11, the protection pipe 11 is lost and communicated with a pipe 13, the top of one side of the diversion shell 6 is provided with an inner discharge seat 12, an external connecting pipe 14 is arranged on one side of a spitting seat 12, an upper shaft sleeve 16 is arranged on the other end of the surface of a pump shaft 5, an upper guide bearing 15 is sleeved on the surface of the upper shaft sleeve 16, a lower guide bearing 9 and the upper guide bearing 15 both adopt sialon bearings to bear the radial force of a pump rotor, the friction coefficient is small, dry abrasion is resistant, the friction loss can be reduced, the pump efficiency is improved, a sealing box body 17 is arranged on one side of an internal connecting pipe 13, a motor support 20 is arranged on the other side of a pump body 24, the motor support 20 is provided with a pump seat 18 through an external flange, a sealing filler layer 19 is arranged at the joint of the pump shaft 5 and the upper shaft sleeve 16, a coupling part 21 is arranged on the other end of the pump shaft 5, a connecting key 22 is arranged on one side of the coupling part 21, an adjusting pad 23 is arranged in the middle of the coupling part 21, and the operating parameters of the pump body 24 reach the design flow 19500m3The design lift is 21.5m, the design efficiency is more than or equal to 87 percent, the efficiency during low-speed operation is 85 percent and meets the requirement of the design specification, and the flow rate is not lower than 21650m when the operation lift of the pump body 24 is 18.5m3Flow rate is not lower than 18000m during low-speed operation3The characteristic curve of the pump body 24 tends to rise from the guarantee point to the closing point smoothly, the pressure grade of a system valve is reduced, the high-efficiency area of the pump body 24 is wide, the high-speed and low-speed working conditions of the pump body 24 are guaranteed to operate in the high-efficiency area, the performance curve of the circulating water pump with the structure is larger than the flow of the original circulating pump by 1000-2000 t/h at the same lift, the output of the pump body 24 is increased, the operating efficiency of a unit is improved, and the performance curve of the pump body 24 is larger than that of the original circulating pump by 1000-2000 t/hThe efficiency is improved to 87% from original 70%, seventeen percentage points are improved, the input power of the pump body 24 is reduced to 1312.3 KW from 1540.6 KW, the power is reduced to 228.3 KW, the energy consumption is reduced by 14.8%, two pump bodies 24 of one unit are calculated according to 8000 hours in one year, the electricity consumption can be saved at 3652800 degrees each year, eight pump bodies 24 of four units are provided in the project, 14611200 degrees of electricity can be saved each year, and the effects of energy conservation and emission reduction are achieved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (6)
1. The utility model provides an energy-saving circulating water pump for thermal power generating unit, includes inhales horn tube (1) and pump body (24), its characterized in that: a suction flared tube (1) is fixedly installed on one side of the pump body (24), the middle of the suction flared tube (1) is fixedly connected with one end of an impeller (3) through an impeller locking nut (2), the middle of the impeller (3) is fixedly connected with one end of a pump shaft (5) through an impeller connecting key (4), guide shells (6) are fixedly installed on both sides of the suction flared tube (1), an inner connecting tube (13) is fixedly installed on one side of each guide shell (6), a lower shaft sleeve (10) is fixedly installed on one end of the surface of the pump shaft (5) through a set screw and a fixing key, a lower guide bearing (9) is sleeved on the outer surface of the lower shaft sleeve (10), the other side of each guide shell (6) is fixedly connected with one end of a protective tube (11), the other end of the protective tube (11) is fixedly communicated with one end of the inner connecting tube (13), a spitting-out seat (12) is fixedly installed on the top of one side of each guide shell (6), the utility model discloses a pump shaft, including spit out one side fixedly connected with of seat (12) and take over (14), the other end fixed mounting on pump shaft (5) surface has last axle sleeve (16), the surface cover of going up axle sleeve (16) is equipped with guide bearing (15), one side fixed mounting of inner union coupling (13) has sealed letter body (17), the opposite side fixed mounting of the pump body (24) has motor support (20), motor support (20) have pump seat (18) through external flange fixed mounting, pump shaft (5) are equipped with sealing packing layer (19) with the junction of last axle sleeve (16), the other end fixed mounting of pump shaft (5) has shaft coupling part (21), one side fixed mounting of shaft coupling part (21) has connect key (22), the middle part fixed mounting of shaft coupling part (21) has adjustment pad (23).
2. The energy-saving circulating water pump for the thermal power generating unit as claimed in claim 1, wherein: the impeller (3) is a closed wheel, the impeller (3) is in a twisted blade shape, and the number of the blades is 5.
3. The energy-saving circulating water pump for the thermal power generating unit as claimed in claim 1, wherein: the surface of the impeller (3) is inlaid with an impeller sealing ring (7), the surface of the guide shell (6) is inlaid with a shell sealing ring (8), and the guide shell (6) is of a bowl-shaped structure.
4. The energy-saving circulating water pump for the thermal power generating unit as claimed in claim 3, wherein: the impeller (3) is a diagonal flow type single-suction impeller, and the surface of the diagonal flow type single-suction impeller is provided with a balance hole.
5. The energy-saving circulating water pump for the thermal power generating unit as claimed in claim 1, wherein: the impeller (3), the pump shaft (5) and the guide shell (6) are all in a draw-out type.
6. The energy-saving circulating water pump for the thermal power generating unit as claimed in claim 1, wherein: the lower guide bearing (9) and the upper guide bearing (15) both adopt sialon bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121439526.1U CN215927794U (en) | 2021-06-28 | 2021-06-28 | Energy-saving circulating water pump for thermal power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121439526.1U CN215927794U (en) | 2021-06-28 | 2021-06-28 | Energy-saving circulating water pump for thermal power generating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927794U true CN215927794U (en) | 2022-03-01 |
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ID=80400348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121439526.1U Active CN215927794U (en) | 2021-06-28 | 2021-06-28 | Energy-saving circulating water pump for thermal power generating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215927794U (en) |
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2021
- 2021-06-28 CN CN202121439526.1U patent/CN215927794U/en active Active
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