CN220203980U

CN220203980U - Lubricating oil cooling device for steam turbine

Info

Publication number: CN220203980U
Application number: CN202321659453.6U
Authority: CN
Inventors: 郭帅; 李晓虹; 杨忠文; 毕扬
Original assignee: Baotou Second Thermal Power Plant North United Power Corp
Current assignee: Baotou Second Thermal Power Plant North United Power Corp
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2023-12-19
Anticipated expiration: 2033-06-28

Abstract

The utility model discloses a lubricating oil cooling device for a steam turbine. A turbine lube oil cooling unit comprising: the oil cooler comprises an oil cooler body, wherein an oil inlet, an oil outlet, a water inlet pipe and a water outlet pipe are arranged on the oil cooler body, and auxiliary cooling mechanisms are arranged on the oil inlet and the oil outlet; the auxiliary cooling mechanism comprises a cooling box, and flanges are installed at two ends of the cooling box. According to the turbine lubricating oil cooling device provided by the utility model, the two auxiliary cooling mechanisms are arranged on the oil cooler body, so that lubricating oil entering and exiting the oil cooler body can be cooled in an auxiliary manner, the original oil temperature exceeding the design requirement can be rapidly reduced to a safe range, the turbine can normally run, the running safety of the turbine is improved, the plurality of flow guiding sheets are arranged in the flow guiding holes in a staggered manner, the heat exchange between the lubricating oil and the flow guiding frame is more complete, and the cooling effect on the lubricating oil is improved.

Description

Lubricating oil cooling device for steam turbine

Technical Field

The utility model relates to the technical field of cooling devices, in particular to a lubricating oil cooling device for a steam turbine.

Background

The oil cooler is an oil cooling device commonly used in an electric power system, and two liquid media with a certain temperature difference can be used for realizing heat exchange by using the device, so that the oil temperature is reduced, and particularly the turbine oil is cooled, and the normal operation of equipment such as a steam turbine can be ensured. Lubricating oil of a turbine of a power plant is cooled by a cooling oil device.

The cooling water for the oil cooler used by the existing power plant steam turbine is generally cooled by a natural convection cooling tower, and the temperature of the cooling water is generally reduced to about 32 ℃ because the cooling water is influenced by the dry and wet bulb temperature. The temperature of the lubricating oil in the main oil tank of the steam turbine is generally about 60 ℃, the oil of 60 ℃ is cooled by using 32 ℃ of water through a traditional oil cooler, and the lubricating oil of the steam turbine is difficult to cool to the temperature range required by design due to the adverse factors such as scaling of a heat exchanger, blockage of a cooling channel and the like.

Accordingly, there is a need to provide a turbine lube oil cooling unit that addresses the above-identified issues.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the lubricating oil cooling device for the steam turbine, which can quickly reduce the oil temperature to be within a safe range.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a turbine lube oil cooling unit comprising: the utility model provides a cold oil ware body, cold oil ware body is tubular cold oil ware, and its inner structure is prior art, and it is unnecessary to describe here, install oil inlet, oil-out, inlet tube and outlet pipe on the cold oil ware body, inlet tube and outlet pipe are used for introducing and discharging the cooling water, the oil inlet with all install auxiliary cooling mechanism on the oil-out, auxiliary cooling mechanism includes the cooling tank, the ring flange of usefulness is installed at the both ends of cooling tank, is connected cooling tank and oil inlet or oil-out through the ring flange, the one end of cooling tank is connected with the lubricating oil circulation cooling line of steam turbine, should install a plurality of thermometers or temperature-detecting equipment on the lubricating oil circulation cooling line, and inflow and outflow temperature to the lubricating oil of steam turbine are monitored through thermometer or temperature-detecting equipment, install a plurality of semiconductor refrigeration boards around the cooling tank, and the refrigeration rate of semiconductor refrigeration board is fast, can cool down the cooling tank in the short time, and then make the lubricating oil through the cooling tank in the cooling tank fast, when the cooling tank's inflow temperature of lubricating oil can't make the turbine reach the design requirement for various reasons, accessible auxiliary cooling mechanism carries out cooling oil to the cooling down to the lubricating oil and stable operation requirement.

Preferably, the semiconductor refrigeration plate is provided with a heat dissipation plate, a plurality of heat dissipation fins are vertically arranged on the heat dissipation plate, and a heat dissipation fan is arranged at one end of the heat dissipation plate.

Preferably, a flow guide frame is arranged in the cooling box, a plurality of flow guide holes are formed in the flow guide frame, a plurality of heat conduction columns are arranged on the flow guide frame, the heat conduction columns are uniformly distributed, and the heat conduction columns penetrate through the shell of the cooling box.

Preferably, a plurality of drainage sheets are arranged in the drainage holes in a staggered manner, so that an S-shaped liquid flow path is formed in the drainage holes.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the utility model, the two auxiliary cooling mechanisms are arranged on the oil cooler body, so that lubricating oil entering and exiting the oil cooler body can be cooled in an auxiliary manner, the oil temperature which exceeds the design requirement originally can be rapidly reduced to be within a safe range, the steam turbine can normally run, and the running safety of the steam turbine is improved;

(2) According to the utility model, the cooling plate and the cooling fan are arranged on the semiconductor refrigeration plate, so that the cooling speed of the semiconductor refrigeration plate can be improved;

(3) According to the utility model, the flow guide frame, the flow guide holes and the heat conduction columns are arranged, so that lubricating oil passing through the cooling box can be guided, and the temperature difference of the lubricating oil in the cooling box in all directions can be reduced;

(4) According to the utility model, the plurality of drainage sheets are arranged in the drainage holes in a staggered manner, so that the heat exchange between the lubricating oil and the drainage frame is more sufficient, and the cooling effect on the lubricating oil is improved.

Drawings

FIG. 1 is a schematic diagram of a lubricating oil cooling device for a steam turbine according to the present utility model;

FIG. 2 is a schematic view of an auxiliary cooling mechanism in the turbine lubricating oil cooling apparatus shown in FIG. 1;

FIG. 3 is a schematic view of a cooling box of the turbine lubricating oil cooling apparatus shown in FIG. 1;

FIG. 4 is a schematic view of a flow guide frame of the lubricating oil cooling device of the steam turbine shown in FIG. 1;

FIG. 5 is a schematic view of a partial cross-sectional structure of a guide frame in the lubricating oil cooling apparatus of the steam turbine shown in FIG. 1.

Wherein, the names corresponding to the reference numerals are: the cooling device comprises a 1-oil cooler body, a 2-oil inlet, a 3-oil outlet, a 4-water inlet pipe, a 5-water outlet pipe, a 6-auxiliary cooling mechanism, a 7-cooling box, an 8-flange, a 9-semiconductor refrigerating plate, a 10-heat dissipation plate, an 11-heat dissipation fan, a 12-flow guide frame, a 13-flow guide hole, a 14-heat conduction column and a 15-flow guide sheet.

Detailed Description

The utility model will be further illustrated by the following description and examples, which include but are not limited to the following examples.

Example 1:

as shown in fig. 1 to 5, the lubricating oil cooling device for a steam turbine provided by the utility model comprises: the oil cooler body 1, the oil cooler body 1 is a tubular oil cooler, the internal structure of the oil cooler body is the prior art, and is not repeated herein, the oil cooler body 1 is provided with an oil inlet 2, an oil outlet 3, a water inlet pipe 4 and a water outlet pipe 5, the water inlet pipe 4 and the water outlet pipe 5 are used for introducing and discharging cooling water, the oil inlet 2 and the oil outlet 3 are provided with auxiliary cooling mechanisms 6, the auxiliary cooling mechanisms 6 comprise cooling boxes 7, two ends of the cooling boxes 7 are provided with flange plates 8 for connection, the cooling boxes 7 are connected with the oil inlet 2 or the oil outlet 3 through the flange plates 8, one end of the cooling boxes 7 is connected with a lubricating oil circulation cooling pipeline of a steam turbine, a plurality of thermometers or temperature detection devices are arranged on the lubricating oil circulation cooling pipeline, the lubricating oil inflow and outflow temperature of the steam turbine are monitored through the thermometers or the temperature detection devices, the cooling box 7 is provided with a plurality of semiconductor refrigeration plates 9 around, the refrigeration speed of the semiconductor refrigeration plates 9 is high, the cooling box 7 can be cooled in a short time, the lubricating oil passing through the cooling box 7 is cooled rapidly, when the inflow temperature of the lubricating oil of the turbine cannot reach the design requirement due to various reasons, the cooling oil can be cooled by the auxiliary cooling mechanism 6, so that the temperature of the lubricating oil reaches the design requirement, the turbine works stably, when the turbine works, the cooling water enters the oil cooler body 1 from the water inlet pipe 4, the lubricating oil entering the oil cooler 1 through the oil inlet 2 is cooled, the cooled lubricating oil flows into the lubricating part inlet of the turbine through the oil outlet 3, the turbine is lubricated, the temperature of the cooling water after heat exchange is raised, and the cooling water is discharged through the water outlet pipe 5, if the temperature of cooling water is too high, the heat exchanger is scaled, the cooling channel is blocked and other adverse factors lead to that the side oil temperature of the oil outlet 5 exceeds the design upper limit (generally the oil temperature is required to be between 35 and 45 ℃), the semiconductor refrigeration plate 9 is electrified, so that the temperature of one side of the semiconductor refrigeration plate, which is clung to the cooling box 7, is rapidly reduced, and then the cooling box 7 is cooled, so that the oil temperature of the oil outlet 2 and the oil port 3 is reduced, the oil temperature of lubricating oil flowing into the lubricating part of the steam turbine reaches the design requirement, and the device reforms the original cooling equipment by adding the auxiliary cooling mechanism 6 on the basis of the original oil cooler, so that the cooling capability of the lubricating oil turbine can be enhanced under the condition of lower cost, and the normal operation of the device is enabled.

Through setting up two supplementary cooling mechanism 6 of installation on the cold oily ware body 1, can be to the supplementary cooling of the lubricating oil of business turn over cold oily ware body 1, make originally surpass the oil temperature of design requirement and can reduce to within the safety range rapidly to make the normal operation of turbine can, improve the security of turbine operation.

Example 2:

as shown in fig. 2, the semiconductor refrigeration plate 9 is provided with a heat dissipation plate 10, a plurality of heat dissipation fins are vertically installed on the heat dissipation plate 10, a heat dissipation fan 11 is installed at one end of the heat dissipation plate 10, when the semiconductor refrigeration plate is used, heat generated at the top of the semiconductor refrigeration plate 9 is conducted to the heat dissipation plate 10, the heat dissipation plate 10 conducts heat to the heat dissipation fins, the heat dissipation fan 11 blows air to the heat dissipation plate and the heat dissipation fins, heat dissipation of the heat dissipation plate 10 is accelerated, the heat dissipation plate 10 can be cooled rapidly, and the semiconductor refrigeration plate 9 is cooled rapidly.

By mounting the heat radiation plate 10 and the heat radiation fan 11 on the semiconductor refrigeration panel 9, the cooling speed of the semiconductor refrigeration panel 9 can be increased.

Example 3:

as shown in fig. 3-4, a flow guiding frame 12 is installed in the cooling box 7, a plurality of flow guiding holes 13 are formed in the flow guiding frame 12, a plurality of heat guiding columns 14 are installed on the flow guiding frame 12, the heat guiding columns 14 are uniformly distributed, the heat guiding columns 14 penetrate through the shell of the cooling box 7 and are connected with the semiconductor refrigeration plate 9, when the cooling box is used, lubricating oil penetrates through the flow guiding frame 12 along the flow guiding holes 13 and exchanges heat with the flow guiding frame 12, so that the temperature of the flow guiding frame 12 is increased, heat of the flow guiding frame 12 is conducted to the semiconductor refrigeration plate 9 through the heat guiding columns 14, and therefore the semiconductor refrigeration plate 9 can cool lubricating oil deep inside the cooling box 7, and the oil temperature in all directions (up-down left-right directions on the same cross section) of the lubricating oil tends to be consistent.

By providing the guide frame 12, the guide holes 13 and the heat conduction column 14, the lubricating oil passing through the cooling box 7 can be guided, and the temperature difference of the lubricating oil in the cooling box 7 in all directions can be reduced.

Example 4:

as shown in fig. 5, the plurality of drainage sheets 15 are installed in the drainage holes 13 in a staggered manner, so that an S-shaped liquid flow path is formed in the drainage holes 13, and when in use, the lubricating oil flows along the S-shaped path, so that the contact area between the lubricating oil and the drainage frame 12 is increased, the heat exchange between the lubricating oil and the drainage frame 12 is more complete, and the cooling effect of the lubricating oil is improved.

By arranging the diversion holes 13, a plurality of diversion sheets 15 are installed in a staggered manner, so that the heat exchange between the lubricating oil and the diversion frame 12 is more sufficient, and the cooling effect on the lubricating oil is improved.

When the cooling device is used, cooling water enters the oil cooler body 1 from the water inlet pipe 4, lubricating oil of a steam turbine entering the oil cooler 1 through the oil inlet 2 is cooled, then the cooled lubricating oil flows into a lubricating part inlet of the steam turbine through the oil outlet 3, parts such as gears and bearings of the steam turbine are lubricated, the temperature of the cooling water after heat exchange is increased, the cooling water is discharged through the water outlet pipe 5, if the temperature of the cooling water is too high, scaling of a heat exchanger, blockage of a cooling channel and other adverse factors cause that the temperature of the side oil of the oil outlet 5 exceeds the design upper limit (the temperature is generally required to be between 35 and 45 ℃), the semiconductor refrigeration plate 9 is electrified, so that the temperature of one side of the cooling box 7 is tightly attached to the cooling plate is rapidly reduced, and the temperature of the cooling box 7 is further reduced, so that the temperature of the lubricating oil flowing into the lubricating part of the steam turbine reaches the design requirement.

The above embodiment is only one of the preferred embodiments of the present utility model, and should not be used to limit the scope of the present utility model, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present utility model are still consistent with the present utility model, and all the technical problems to be solved are included in the scope of the present utility model.

Claims

1. A turbine lube oil cooling unit comprising:

the oil cooler comprises an oil cooler body, wherein an oil inlet, an oil outlet, a water inlet pipe and a water outlet pipe are arranged on the oil cooler body, and auxiliary cooling mechanisms are arranged on the oil inlet and the oil outlet;

the auxiliary cooling mechanism comprises a cooling box, flange plates are arranged at two ends of the cooling box, and a plurality of semiconductor refrigerating plates are arranged around the cooling box.

2. The turbine lube oil cooling unit according to claim 1 wherein said semiconductor refrigeration plate is provided with a heat sink.

3. The lubricating oil cooling device for a steam turbine according to claim 2, wherein a radiator fan is installed at one end of the radiator plate.

4. The lubricating oil cooling device for a steam turbine according to claim 1, wherein a diversion frame is installed in the cooling box, and a plurality of diversion holes are formed in the diversion frame.

5. The lubricating oil cooling device for a steam turbine according to claim 4, wherein a plurality of heat conducting columns are mounted on the guide frame, and the heat conducting columns penetrate through the cooling box and are connected with the semiconductor refrigeration plate.

6. The lubricating oil cooling device for a steam turbine according to claim 4, wherein a plurality of flow guiding sheets are installed in the flow guiding holes in a staggered manner.