CN217080860U - High-efficient cooling structure of leading pump bearing room of feedwater of thermal power plant - Google Patents

Abstract

High-efficient cooling structure of leading pump bearing chamber of thermal power plant feedwater. Bearing room gusset divides into two cavities of size inequality with the bearing room, and the cooling device of design is located the bearing below, and the cavity that the oil slinger belongs to does not have cooling device, and the space utilization is insufficient causes lubricating oil cooling efficiency to be lower simultaneously. The utility model discloses the constitution includes: the cooling device comprises a bearing chamber (4), wherein a cooling device is fixed below an oil slinger (5) positioned at the end part (7) of the shaft diameter in the bearing chamber; the cooling device comprises a cooling pipe (2), a water inlet pipe (1) and a water outlet pipe (3) which are positioned in the bearing chamber, wherein one end of the cooling pipe is fixed with the water inlet pipe, and the other end of the cooling pipe is fixed with the water outlet pipe. The utility model is used for the high-efficient cooling of the leading pump bearing room of feedwater of thermal power plant.

Description

High-efficient cooling structure of leading pump bearing room of feedwater of thermal power plant

Technical Field

The utility model relates to a high-efficient cooling structure of leading pump bearing room of feedwater of thermal power plant.

Background

The water supply pre-pump is an important power output of working medium circulation of a thermal power generation enterprise, the water supply pre-pump is generally a horizontal single-stage double-suction single volute pump, the water pump has the advantages of simple structure, compact arrangement and stable output, but after being applied by more power plants, the water pump has a common and common problem of higher temperature of a bearing at the free end, the bearing is a rolling bearing, a pair of single-row angular contact ball bearings is designed to be installed back to back, axial thrust is balanced by the pair of thrust bearings, inherent high-temperature hidden danger exists, a single-inlet single-outlet spiral cooling pipe is adopted for cooling, the operating temperature is 70-80 ℃ under normal conditions, the temperature reaches 80-90 ℃ under summer environment, the safe operating temperature of the rolling bearing is seriously exceeded, most power plants are forced to adopt an external axial flow fan for cooling or are forced to reduce power generation load to solve the hidden danger, but still can not solve the problem of high temperature fundamentally and cause the equipment to break down due to frequent bearing burning loss, thus causing huge loss on power generation. The reason is that the analysis of the main reasons for the high temperature includes the following points: (1) the bearing chamber is divided into two chambers with uneven sizes by the bearing chamber rib plate, the designed cooling device is positioned below the bearing, and the chamber where the oil slinger is positioned has no cooling device, so that the lubricating oil cooling efficiency is low while the space utilization is insufficient; (2) the bearing seat is directly connected with the pump body, the temperature of the pump body is up to more than 100 ℃, and the temperature of the bearing chamber is increased through heat conduction.

Disclosure of Invention

The utility model aims at providing a high-efficient cooling structure of leading pump bearing chamber of feedwater of thermal power plant to solve above-mentioned existing problem.

The above purpose is realized by the following technical scheme:

the utility model provides a high-efficient cooling structure of leading pump bearing chamber of feedwater of thermal power plant, its constitution includes: the cooling device is fixed below an oil slinger positioned at the end part of the shaft diameter in the bearing chamber;

the cooling device comprises a cooling pipe, a water inlet pipe and a water outlet pipe which are positioned in the bearing chamber, wherein the water inlet pipe is fixed at one end of the cooling pipe, and the water outlet pipe is fixed at the other end of the cooling pipe.

The high-efficiency cooling structure for the bearing chamber of the water supply pre-pump of the thermal power plant is characterized in that the cooling pipe is a spiral cooling pipe.

Has the advantages that:

1. the utility model discloses at free end bearing room bottom cooling device of the newly-increased same kind, cooling device arranges under the axle diameter tip oil slinger, under the oil slinger effect, and here lubricating oil is in the mobile state just, improves its cooling effect.

2. The utility model discloses the major structure of bearing room does not make big change, make full use of current cooling water source and pipeline, only add the spiral cooling tube to bearing room below trompil, greatly reduced thoroughly reform transform required cost.

3. The utility model discloses behind installing cooling device additional, bearing cooling efficiency improves by a wide margin, and under the extremely high temperature environment in summer, the bearing temperature descends to within 60 ℃ from original 80-90 ℃, thoroughly eliminates the equipment trouble hidden danger that the bearing scaling loss leads to.

Description of the drawings:

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

in the figure: 1. a water inlet pipe; 2. a cooling tube; 3. a water outlet pipe; 4. a bearing chamber; 5. an oil slinger; 6. a bearing; 7. the shaft diameter end part.

The specific implementation mode is as follows:

example 1:

the utility model provides a high-efficient cooling structure of leading pump bearing chamber of feedwater of thermal power plant, its constitution includes: a bearing chamber 4, in which a cooling device is fixed below an oil slinger 5 positioned at a shaft diameter end part 7;

the cooling device comprises a cooling pipe 2, a water inlet pipe 1 and a water outlet pipe 3 which are positioned in the bearing chamber, wherein one end of the cooling pipe is fixed with the water inlet pipe, and the other end of the cooling pipe is fixed with the water outlet pipe.

Example 2:

according to the efficient cooling structure for the bearing chamber of the feedwater front pump in the thermal power plant in the embodiment 1, the cooling pipe is a spiral cooling pipe.

On the basis that the structure does not change the main structure of the original bearing chamber, the cooling device is newly added at the bottom of the free end bearing chamber, the newly added cooling device and the original cooling device are arranged in parallel, the source and the destination of cooling water are consistent with those of the original existing system, the newly added cooling device is arranged under an oil slinger at the end part of the shaft diameter, lubricating oil is just in a flowing state under the action of the oil slinger, and the cooling effect is better after the newly added cooling device is arranged at the position.

Claims (2)

1. The utility model provides a high-efficient cooling structure of leading pump bearing chamber of feedwater of thermal power plant, its constitution includes: bearing room, characterized by: a cooling device is fixed below an oil slinger positioned at the end part of the shaft diameter in the bearing chamber;

the cooling device comprises a cooling pipe, a water inlet pipe and a water outlet pipe which are positioned in the bearing chamber, wherein the water inlet pipe is fixed at one end of the cooling pipe, and the water outlet pipe is fixed at the other end of the cooling pipe.

2. The efficient cooling structure for the bearing chamber of the feedwater front pump of the thermal power plant as claimed in claim 1, wherein: the cooling pipe is a spiral cooling pipe.

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