Lubricating device for induced draft fan of power plant

Abstract

The utility model relates to the technical field of lubricating devices, in particular to a power plant induced draft fan lubricating device which comprises an induced draft fan body and an induced draft fan motor, a first bearing chamber is arranged in the induced draft fan body, a second bearing chamber is arranged in the induced draft fan motor, and the first bearing chamber is connected with a first lubricating oil station through a first circulating pipe. The second bearing chamber is connected with a second lubricating oil station through a second circulating pipe; the first circulating pipe and the second circulating pipe are connected through a connecting pipeline; a stop valve and a pressure reducing valve are arranged on the connecting pipeline; an isolating valve for isolating the second lubricating oil station is arranged on the second circulating pipe; by arranging the connecting pipeline and the pressure reducing valve, lubricating oil of the first lubricating oil station can be supplied to the induced draft fan body and the induced draft fan motor at the same time, the second lubricating oil station is used for standby application, and therefore stability of lubricating oil supply is guaranteed, and safe operation of a unit is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication devices, in particular to a lubrication device for an induced draft fan in a power plant. Background Art

[0002] The induced draft fan of a power plant consists of an induced draft fan body and an induced draft fan motor. The induced draft fan body and the induced draft fan motor are each equipped with a lubricating oil station. The lubricating oil station equipped with the induced draft fan motor has a small capacity and unstable performance. Failures often occur during use, causing the induced draft fan to be forced to shut down, seriously affecting the safe operation of the unit. Utility Model Content

[0003] The main purpose of the utility model is to provide a lubricating device for an induced draft fan of a power plant, so as to solve the problem in the prior art that the motor lubricating oil station often fails and seriously affects the safe operation of the unit.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a lubrication device for an induced draft fan in a power plant, comprising an induced draft fan body and an induced draft fan motor. A first bearing chamber is arranged in the induced draft fan body, a second bearing chamber is arranged in the induced draft fan motor, the first bearing chamber is connected to a first lubricating oil station via a first circulation pipe, the second bearing chamber is connected to a second lubricating oil station via a second circulation pipe, the first circulation pipe and the second circulation pipe are connected via a connecting pipe; a stop valve and a pressure reducing valve are arranged on the connecting pipe, and an isolation valve for isolating the second lubricating oil station is arranged on the second circulation pipe.

[0005] Furthermore, the first circulation pipe includes a first oil inlet pipe and a first oil return pipe, the second circulation pipe includes a second oil inlet pipe and a second oil return pipe, and the connecting pipeline includes a connecting oil inlet pipe and a connecting oil return pipe; the connecting oil inlet pipe connects the first oil inlet pipe and the second oil inlet pipe, and the connecting oil return pipe connects the first oil return pipe and the second oil return pipe; the connecting oil inlet pipe and the connecting oil return pipe are both provided with a shut-off valve, and the connecting oil inlet pipe is provided with a pressure reducing valve.

[0006] Furthermore, the second oil inlet pipe and the second oil return pipe are both provided with isolation valves, and the isolation valves are located between the connection point between the connecting pipeline and the second circulation pipe and the second lubricating oil station.

[0007] Furthermore, a first main shaft is provided in the induced draft fan body 1, a second main shaft is provided in the induced draft fan motor, the first main shaft and the second main shaft are connected via a coupling, the first bearing chamber is sleeved on the outside of the first main shaft, and the second bearing chamber is sleeved on the outside of the second main shaft.

[0008] The utility model provides a connecting pipeline and a pressure reducing valve, so that the lubricating oil of the first lubricating oil station can be used for the induced draft fan body and the induced draft fan motor at the same time, and the second lubricating oil station is used as a backup, thereby ensuring the stability of the lubricating oil supply and the safe operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0010] Figure 1 It is a structural schematic diagram of an embodiment;

[0011] In the figure: 1. induced draft fan body; 101. first bearing chamber; 102. first main shaft; 2. induced draft fan motor; 201. second bearing chamber; 202. second main shaft; 3. first lubricating oil station; 4. second lubricating oil station; 5. first circulation pipe; 501. first oil inlet pipe; 502. first oil return pipe; 6. second circulation pipe; 601. second oil inlet pipe; 602. second oil return pipe; 7. connecting pipeline; 701. connecting oil inlet pipe; 702. connecting oil return pipe; 8. stop valve; 9. pressure reducing valve; 10. isolation valve; 11. coupling; 12. fan blades. DETAILED DESCRIPTION

[0012] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0013] like Figure 1 As shown, according to an embodiment of the utility model, a lubrication device for an induced draft fan in a power plant is provided, comprising an induced draft fan body 1 and an induced draft fan motor 2. A first bearing chamber 101 is arranged in the induced draft fan body 1, and a plurality of second bearing chambers 201 are arranged inside the induced draft fan motor 2. The first bearing chamber 101 is connected to a first lubricating oil station 3 via a first circulation pipe 5, and the second bearing chamber 201 is connected to a second lubricating oil station 4 via a second circulation pipe 6; the first circulation pipe 5 and the second circulation pipe 6 are connected via a connecting pipe 7; a stop valve 8 and a pressure reducing valve 9 are arranged on the connecting pipe 7, and an isolation valve 10 for isolating the second lubricating oil station 4 is arranged on the second circulation pipe 6.

[0014] The first circulation pipe 5 includes a first oil inlet pipe 501 and a first oil return pipe 502, the second circulation pipe 6 includes a second oil inlet pipe 601 and a second oil return pipe 602, and the connecting pipe 7 includes a connecting oil inlet pipe 701 and a connecting oil return pipe 702; the connecting oil inlet pipe 701 connects the first oil inlet pipe 501 and the second oil inlet pipe 601, and the connecting oil return pipe 702 connects the first oil return pipe 502 and the second oil return pipe 602; the connecting oil inlet pipe 701 and the connecting oil return pipe 702 are both provided with a stop valve 8, and the connecting oil inlet pipe 701 is provided with a pressure reducing valve 9.

[0015] The second oil inlet pipe 601 and the second oil return pipe 602 are both provided with an isolation valve 10 , and the isolation valve 10 is located between the connection point of the connecting pipeline 7 and the second circulation pipe and the second lubricating oil station 4 .

[0016] A first main shaft 102 is provided in the induced draft fan body 1, and a fan blade 12 is installed on the first main shaft 102. A second main shaft 202 is provided in the induced draft fan motor 2. The first main shaft 102 and the second main shaft 202 are connected by a coupling 11. The first bearing chamber 101 is sleeved on the outside of the first main shaft 102, and the second bearing chamber 201 is sleeved on the outside of the second main shaft 202.

[0017] By providing the connecting pipe 7 and the pressure reducing valve 9, the present embodiment can supply the lubricating oil of the first lubricating oil station 3 to the induced draft fan body 1 and the induced draft fan motor 2 at the same time, and use the second lubricating oil station 4 as a backup, thereby ensuring the stability of the lubricating oil supply and the safe operation of the unit.

[0018] After using this embodiment, the lubrication state of the induced draft fan body 1 and the induced draft fan motor 2 is good, and the induced draft fan is no longer forced to stop operating.

[0019] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lubricating device for an induced draft fan in a power plant, comprising an induced draft fan body (1) and an induced draft fan motor (2), wherein the induced draft fan body (1) is provided with a first bearing chamber (101), the induced draft fan motor (2) is provided with a second bearing chamber (201), the first bearing chamber (101) is connected to a first lubricating oil station (3) via a first circulation pipe (5), and the second bearing chamber (201) is connected to a second lubricating oil station (4) via a second circulation pipe (6), characterized in that: The first circulation pipe (5) and the second circulation pipe (6) are connected via a connecting pipe (7); a stop valve (8) and a pressure reducing valve (9) are provided on the connecting pipe (7); and an isolation valve (10) for isolating the second lubricating oil station (4) is provided on the second circulation pipe (6).

2. The lubrication device for the induced draft fan of a power plant according to claim 1, characterized in that: The first circulation pipe (5) comprises a first oil inlet pipe (501) and a first oil return pipe (502); the second circulation pipe (6) comprises a second oil inlet pipe (601) and a second oil return pipe (602); the connecting pipe (7) comprises a connecting oil inlet pipe (701) and a connecting oil return pipe (702); the connecting oil inlet pipe (701) connects the first oil inlet pipe (501) and the second oil inlet pipe (601); the connecting oil return pipe (702) connects the first oil return pipe (502) and the second oil return pipe (602); both the connecting oil inlet pipe (701) and the connecting oil return pipe (702) are provided with a stop valve (8); and the connecting oil inlet pipe (701) is provided with a pressure reducing valve (9).

3. The lubrication device for the induced draft fan of a power plant according to claim 2, characterized in that: The second oil inlet pipe (601) and the second oil return pipe (602) are both provided with an isolation valve (10), and the isolation valve (10) is located between the connection point between the connecting pipe (7) and the second circulation pipe (6) and the second lubricating oil station (4).

4. The lubrication device for the induced draft fan of a power plant according to claim 1, characterized in that: A first main shaft (102) is provided in the induced draft fan body (1), and a second main shaft (202) is provided in the induced draft fan motor (2); the first main shaft (102) and the second main shaft (202) are connected via a coupling (11); the first bearing chamber (101) is sleeved on the outside of the first main shaft (102), and the second bearing chamber (201) is sleeved on the outside of the second main shaft (202).

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