CN215057598U

CN215057598U - Heat radiation structure is used in power plant steam turbine operation

Info

Publication number: CN215057598U
Application number: CN202120783366.6U
Authority: CN
Inventors: 任旭辉; 吕文明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-12-07
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a heat radiation structure is used in power plant steam turbine operation, including water-cooling heat transfer device, air-cooled heat abstractor, water-cooling heat abstractor and steam turbine body, water-cooling heat transfer device locates on the steam turbine body, air-cooled heat abstractor locates on the water-cooling heat transfer device, water-cooling heat abstractor locates on the water-cooling heat transfer device. The utility model belongs to the technical field of steam turbine auxiliary devices, in particular to a heat dissipation structure for the operation of a steam turbine in a power plant; the utility model discloses a water-cooling transfer device is with the heat transfer to the water tank on box surface, and in the external air of rethread fin diffusion, through the air-cooled device air flow in promoting the heat dissipation shell, prevent that the heat from piling up and forming the heat preservation, box temperature nonconformity about effectively having solved present steam turbine leads to the main shaft thermal energy inhomogeneous and takes place crooked problem.

Description

Heat radiation structure is used in power plant steam turbine operation

Technical Field

The utility model belongs to the technical field of the steam turbine auxiliary device, specifically indicate a heat radiation structure is used in power plant steam turbine operation.

Background

The steam turbine is the important part among the common power generation system of steam power plant, and its theory of operation promotes the main shaft rotation through high-pressure steam to generate electricity, but because the design defect of steam turbine itself, the heat-sinking capability of upper and lower box is different, and there is the difference in temperature in the box about leading to, and this kind of difference in temperature is one of the main reason that causes the steam turbine main shaft to be crooked, and upper and lower box produces the difference in temperature mainly because following several reason:

1. the upper box body and the lower box body have different weights and heat dissipation areas, the weight of the lower box body is larger than that of the upper box body, the lower box body is provided with a steam extraction pipeline, the heat dissipation area is large, and under the same heating or cooling condition, the lower box body dissipates heat quickly and heats slowly, so the temperature of the upper box body is higher than that of the lower box body;

2. in the box body, steam rises, and condensed water of the steam flows downwards to change the heating condition of the lower box body;

3. in the surrounding space, the temperature of the air above the operation platform is higher than that below the operation platform, and the airflow flows from bottom to top, so that the cooling conditions of the upper box body and the lower box body are different, and the temperature of the upper box body is higher than that of the lower box body;

4. when the opening sequence of the speed regulation valve is not proper, partial steam is introduced, and the temperature difference between the upper box body and the lower box body is increased;

5. in the starting process, the box body is not smooth in drainage, and cold steam cold water returns to the box body from the steam extraction pipeline after the machine is stopped, so that the temperature of the lower box body is reduced;

6. the lower box body has poor heat preservation, because the heat preservation of the lower box body is not easy to be tight as that of the upper box body, the lower box body is cooled by air from the surface;

7. after the machine is stopped, air convection is formed in the box body, air with high temperature is gathered in the upper box body, the air temperature in the lower box body is low, and the cooling conditions of the upper box body and the lower box body are different.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming prior art's defect, the utility model provides a heat radiation structure is used in power plant steam turbine operation, in the heat transfer to the water tank with the box surface through water-cooling transfer device, the rethread fin spreads to external air, promotes the air flow in the heat dissipation shell through the air cooling unit, prevents that the heat from piling up and forming the heat preservation, has effectively solved box temperature inconsistent about present steam turbine, leads to the main shaft thermal energy inhomogeneous and take place crooked problem.

The utility model adopts the following technical scheme: the utility model relates to a heat radiation structure for operation of a steam turbine in a power plant, which comprises a water-cooling heat transfer device, an air-cooling heat radiation device, a water-cooling heat radiation device and a steam turbine body, wherein the water-cooling heat transfer device is arranged on the steam turbine body; the water-cooling heat transfer device comprises a fan-shaped hollow heat dissipation shell, a turning joint, an arc-shaped water pipe and a straight water pipe, wherein the fan-shaped hollow heat dissipation shell is arranged on the steam turbine body, shell ventilation openings are symmetrically formed in the fan-shaped hollow heat dissipation shell, a motor installation round platform is arranged at one end of the fan-shaped hollow heat dissipation shell, water pipe installation holes are formed in two ends of the fan-shaped hollow heat dissipation shell respectively, the turning joint is arranged on the steam turbine body, the arc-shaped water pipe is arranged on the turning joint, and the straight water pipe is arranged on the turning joint.

Further, air-cooled heat abstractor includes forced air cooling driving motor and blast impeller, be equipped with motor mounting flange on the forced air cooling driving motor, forced air cooling driving motor passes through motor mounting flange and motor installation round platform bolted connection, be equipped with the motor output shaft on the forced air cooling driving motor, on the motor output shaft was located in the blast impeller block, the annular blade of taking a breath that has all laid on the blast impeller.

Further, water-cooling heat abstractor is including indulging putting water pipe, heat dissipation water tank, water tank support post and circulating water pump, circulating water pump locates on the straight water pipe, indulge putting on the water pipe locates circulating water pump, heat dissipation water tank locates on the indulging putting the water pipe, the last array of heat dissipation water tank is equipped with the water tank fin, water tank support post locates on the steam turbine body, heat dissipation water tank locates on the water tank support post.

Further, the steam turbine body comprises a main body bottom plate, a steam turbine lower box body, a steam turbine upper box body, a steam turbine bearing, a steam turbine main shaft and a bearing end cover, the lower box body of the steam turbine is arranged on the main body bottom plate, the water tank supporting upright post is arranged on the main body bottom plate, the upper box body of the steam turbine is arranged on the lower box body of the steam turbine, the bearing of the steam turbine is clamped in the lower box body of the steam turbine, the turbine bearing is clamped in the upper box body of the turbine, a bearing mounting shaft is arranged on the main shaft of the turbine, the turbine bearing is clamped on the bearing mounting shaft, the turbine main shaft is rotatably arranged in a gap formed by the turbine lower box body and the turbine upper box body, the bearing end cover is connected with a lower box body bolt of the steam turbine, the bearing end cover is connected with an upper box body bolt of the steam turbine, and the main shaft of the steam turbine is rotatably arranged in the bearing end cover.

Adopt above-mentioned structure the utility model discloses the beneficial effect who gains as follows: this scheme is heat radiation structure for power plant steam turbine operation, in the heat transfer water tank with the box surface through water-cooling transfer device, the rethread fin diffuses to external air, promotes the air flow in the heat dissipation shell through air cooling unit, prevents that the heat from piling up and forming the heat preservation, has effectively solved present steam turbine about the box temperature inconsistent, lead to the main shaft thermal energy inhomogeneous and take place crooked problem.

Drawings

Fig. 1 is a perspective view of a heat dissipation structure for operation of a steam turbine of a power plant according to the present invention;

fig. 2 is an exploded view of the heat dissipation structure for operation of a steam turbine of a power plant according to the present invention;

fig. 3 is a front view of the heat dissipation structure for operation of a steam turbine of a power plant according to the present invention;

fig. 4 is a top view of the heat dissipation structure for operation of a steam turbine of a power plant according to the present invention;

FIG. 5 is a cross-sectional view taken along section line A-A of FIG. 3;

fig. 6 is a partially enlarged view of a portion i in fig. 5.

The heat exchanger comprises a water-cooling heat transfer device 1, a water-cooling heat transfer device 2, an air-cooling heat dissipation device 3, a water-cooling heat dissipation device 4, a steam turbine body 5, a fan-shaped hollow heat dissipation shell 6, a turning joint 7, an arc-shaped water pipe 8, a straight water pipe 9, a shell ventilation opening 10, a motor mounting circular truncated cone 11, a water pipe mounting hole 12, an air-cooling driving motor 13, a blower impeller 14, a motor mounting flange 15, a motor output shaft 16, a ventilation blade 17, a longitudinal water pipe 18, a heat dissipation water tank 19, a water tank supporting upright post 20, a water tank cooling fin 21, a main body bottom plate 22, a steam turbine lower box 23, a steam turbine upper box 24, a steam turbine bearing 25, a steam turbine main shaft 26, a bearing mounting shaft 27, a bearing end cover 28 and a circulating water pump.

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

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 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.

As shown in fig. 1-6, the heat dissipation structure for operation of a steam turbine in a power plant of the present invention includes a water-cooling heat transfer device 1, an air-cooling heat dissipation device 2, a water-cooling heat dissipation device 3, and a steam turbine body 4, wherein the water-cooling heat transfer device 1 is disposed on the steam turbine body 4, the air-cooling heat dissipation device 2 is disposed on the water-cooling heat transfer device 1, and the water-cooling heat dissipation device 3 is disposed on the water-cooling heat transfer device 1; water-cooling heat transfer device 1 includes fan-shaped cavity heat dissipation shell 5, turn and connects 6, arc water pipe 7 and straight water pipe 8, fan-shaped cavity heat dissipation shell 5 is located on steam turbine body 4, the symmetry is equipped with shell vent 9 on the fan-shaped cavity heat dissipation shell 5, the one end of fan-shaped cavity heat dissipation shell 5 is equipped with motor installation round platform 10, the both ends of fan-shaped cavity heat dissipation shell 5 are equipped with water pipe mounting hole 11 respectively, turn connects 6 and locates on steam turbine body 4, arc water pipe 7 is located on turn connects 6, straight water pipe 8 is located on turn connects 6.

The air-cooled heat dissipation device 2 comprises an air-cooled driving motor 12 and a blower impeller 13, a motor mounting flange 14 is arranged on the air-cooled driving motor 12, the air-cooled driving motor 12 is connected with a motor mounting boss 10 through a bolt through the motor mounting flange 14, a motor output shaft 15 is arranged on the air-cooled driving motor 12, the blower impeller 13 is clamped on the motor output shaft 15, and air exchange blades 16 are uniformly distributed on the blower impeller 13 in an annular mode.

The water-cooling heat dissipation device 3 includes indulge water pipe 17, heat dissipation water tank 18, water tank support post 19 and circulating water pump 28, circulating water pump 28 locates on the straight water pipe 8, indulge water pipe 17 and locate on circulating water pump 28, heat dissipation water tank 18 locates on indulging water pipe 17, the array is equipped with water tank fin 20 on the heat dissipation water tank 18, water tank support post 19 is located on the steam turbine body 4, heat dissipation water tank 18 is located on water tank support post 19.

The steam turbine body 4 comprises a main body bottom plate 21, a steam turbine lower box body 22, a steam turbine upper box body 23, a steam turbine bearing 24, a steam turbine main shaft 25 and a bearing end cover 27, wherein the steam turbine lower box body 22 is arranged on the main body bottom plate 21, the water tank supporting upright column 19 is arranged on the main body bottom plate 21, the steam turbine upper box body 23 is arranged on the steam turbine lower box body 22, the steam turbine bearing 24 is clamped in the steam turbine upper box body 23, a bearing mounting shaft 26 is arranged on the steam turbine main shaft 25, the steam turbine bearing 24 is clamped in the bearing mounting shaft 26, the steam turbine main shaft 25 is rotatably arranged in a gap formed by the steam turbine lower box body 22 and the steam turbine upper box body 23, the bearing end cover 27 is in bolted connection with the steam turbine lower box body 22, and the bearing end cover 27 is in bolted connection with the steam turbine upper box body 23, the turbine main shaft 25 is rotatably disposed in a bearing end cap 27.

When the turbine box cover is used, due to the design reason of the turbine box cover, the temperature of the upper box body 23 of the turbine is lower than that of the lower box body 22 of the turbine in normal operation, at the moment, the circulating water pump 28 is started, the heat on the surface of the upper box body 23 of the turbine is conveyed to the radiating water tank 18 along the longitudinal water pipe 17 through the water flowing in the arc-shaped water pipe 7 and the straight water pipe 8, and then is radiated to the outside through the water tank radiating fins 20, in the process, the air in the fan-shaped hollow radiating shell 5 is heated to form a heat insulating layer to influence the radiating, if the fan-shaped hollow radiating shell 5 is directly cancelled, the arc-shaped water pipe 7 is in direct contact with the outside and is not beneficial to absorbing the heat on the upper box body 23 of the turbine, at the moment, the air cooling driving motor 12 is started to drive the blower impeller 13 to rotate through the motor output shaft 15, so that the air flows into the fan-shaped hollow radiating shell vent 5 from the shell vent 9 on the same side of the motor mounting circular platform 10, then flows out from the ventilation opening 9 of the shell at the other side, so that the utility model discloses holistic work flow, repeat this step when using next time can.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a heat radiation structure is used in power plant steam turbine operation which characterized in that: the steam turbine comprises a water-cooling heat transfer device, an air-cooling heat dissipation device, a water-cooling heat dissipation device and a steam turbine body, wherein the water-cooling heat transfer device is arranged on the steam turbine body; the water-cooling heat transfer device comprises a fan-shaped hollow heat dissipation shell, a turning joint, an arc-shaped water pipe and a straight water pipe, wherein the fan-shaped hollow heat dissipation shell is arranged on the steam turbine body, shell ventilation openings are symmetrically formed in the fan-shaped hollow heat dissipation shell, a motor installation round platform is arranged at one end of the fan-shaped hollow heat dissipation shell, water pipe installation holes are formed in two ends of the fan-shaped hollow heat dissipation shell respectively, the turning joint is arranged on the steam turbine body, the arc-shaped water pipe is arranged on the turning joint, and the straight water pipe is arranged on the turning joint.

2. The heat dissipating structure for use in operating a steam turbine of a power plant according to claim 1, wherein: the air-cooled heat dissipation device comprises an air-cooled driving motor and a blower impeller, a motor mounting flange is arranged on the air-cooled driving motor, the air-cooled driving motor is connected with a motor mounting round platform bolt through the motor mounting flange, a motor output shaft is arranged on the air-cooled driving motor, the blower impeller is clamped on the motor output shaft, and ventilation blades are annularly and uniformly distributed on the blower impeller.

3. The heat dissipating structure for use in operating a steam turbine of a power plant according to claim 2, wherein: the water-cooling heat dissipation device comprises a longitudinal water pipe, a heat dissipation water tank, a water tank supporting stand column and a circulating water pump, wherein the circulating water pump is arranged on the straight water pipe, the longitudinal water pipe is arranged on the circulating water pump, the heat dissipation water tank is arranged on the longitudinal water pipe, water tank cooling fins are arranged on the heat dissipation water tank in an array mode, the water tank supporting stand column is arranged on the steam turbine body, and the heat dissipation water tank is arranged on the water tank supporting stand column.

4. The heat dissipating structure for use in operating a steam turbine of a power plant according to claim 3, wherein: the steam turbine body includes main part bottom plate, steam turbine lower box, steam turbine upper box, steam turbine bearing, steam turbine main shaft and bearing end cover, the steam turbine lower box is located on the main part bottom plate, water tank support post locates on the main part bottom plate, the steam turbine upper box is located on the steam turbine lower box, steam turbine bearing block is located in the steam turbine upper box, be equipped with bearing installation axle on the steam turbine main shaft, steam turbine bearing block is located on the bearing installation axle, the steam turbine main shaft rotates and locates in the space that steam turbine lower box and steam turbine upper box are constituteed, bearing end cover and steam turbine lower box bolted connection, bearing end cover and steam turbine upper box bolted connection, the steam turbine main shaft rotates and locates in the bearing end cover.