CN217270492U

CN217270492U - #2 bearing oil return pipe sealing structure for PG9171E type gas turbine

Info

Publication number: CN217270492U
Application number: CN202220625784.7U
Authority: CN
Inventors: 谢恒祥; 王胜; 潘福; 李飞; 厉福源; 朱海涛
Original assignee: Wuxi Blue Sky Gas Turbine Cogeneration Co ltd
Current assignee: Wuxi Blue Sky Gas Turbine Cogeneration Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-23
Anticipated expiration: 2032-03-22

Abstract

The embodiment of the utility model provides a #2 bearing oil return pipe seal structure for PG9171E type gas turbine, including the #2 bearing oil return pipe of the PG9171E type gas turbine who passes the burning support cylinder base, oil return pipe top meets gas turbine's #2 bearing, the lower extreme passes the burning support cylinder base, the position that oil return pipe and burning support cylinder base are connected, outside parcel has corrugated steel pipe, corrugated steel pipe bottom and burning support cylinder base welding, corrugated steel pipe top closing cap has the steel sheet, steel sheet inner circle and oil return pipe outer wall welding, outer lane and corrugated steel pipe top welding.

Description

#2 bearing oil return pipe sealing structure for PG9171E type gas turbine

Technical Field

The utility model relates to a #2 bearing returns oil pipe seal structure for PG9171E type gas turbine.

Background

The air leakage between a bearing oil return pipe and a combustion supporting cylinder of a newly-built unit #2 of the PG9171E type gas turbine is large, and when the temperature is high at 40 ℃ in summer, the space temperature between turbines can reach 100 ℃, so that the safe operation of the unit is seriously threatened. Under such a severe environment, the insulating joint of the surge-proof valve limit switch can be aged, so that direct-current ground faults are caused; the dangerous gas probe is unstable in operation, frequently gives out 'faults and high-concentration alarms', can cause protection misoperation, and is inconvenient to operate and monitor. Each power plant basically adopts the method of adding packing or beating high-temperature glue, the effect cannot be continuous, and the hidden trouble cannot be fundamentally solved.

Disclosure of Invention

The embodiment of the application provides a #2 bearing (meaning of No. 2 bearing, the same below) return oil pipe seal structure for PG9171E type gas turbine, has effectually prevented high-temperature gas leakage, has built a good operational environment for the turbine room.

The utility model provides a #2 bearing returns oil pipe seal structure for PG9171E type gas turbine, including the #2 bearing that passes the PG9171E type gas turbine of burning support cylinder base returns oil pipe, return oil pipe top and connect the #2 bearing of gas turbine, the lower extreme passes burning support cylinder base, a serial communication port, the position that returns oil pipe and burning support cylinder base are connected, the outside parcel has corrugated steel pipe, corrugated steel pipe bottom and burning support cylinder base welding, corrugated steel pipe top closing cap has the steel sheet, steel sheet inner circle and the welding of returning oil pipe outer wall, outer lane and the welding of corrugated steel pipe top.

Furthermore, a flange plate is arranged on the base of the combustion supporting cylinder, the oil return pipe is welded on the flange plate, and the bottom of the steel corrugated pipe is also welded on the flange plate.

Furthermore, the two ends of the steel corrugated pipe are provided with flanges, and the middle of the flanges is provided with a pull rod (standard part).

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

the #2 bearing of the PG9171E type gas turbine is positioned in the combustion supporting cylinder, and a leakage point is generated between the joint surface of the #2 bearing oil return pipe and the bottom of the combustion supporting cylinder. After the unit is started, the bottom of the combustion supporting cylinder can contract under the influence of expansion with heat and contraction with cold, and the relative positions of the oil return pipe and the combustion supporting cylinder can change. And a corrugated steel pipe is additionally arranged on the joint surface of the #2 bearing oil return pipe and the combustion supporting cylinder and is welded with the oil return pipe and the combustion supporting cylinder. Because the steel corrugated pipe has elasticity, the sealing with the oil return pipe is ensured, and meanwhile, the expansion of the cylinder is not influenced.

After the unit is started, under the same working condition, the space temperature between the turbines is reduced by 20 ℃, the safe operation of the unit is effectively guaranteed, and the unit can be conveniently and regularly patrolled by personnel.

Drawings

FIG. 1 is a schematic view of the system of the present invention;

Detailed Description

Example 1:

a #2 bearing oil return pipe sealing structure for a PG9171E type gas turbine comprises a #2 bearing 2 oil return pipe 5 of a PG9171E type gas turbine penetrating through a base of a combustion supporting cylinder 1, wherein the top end of the oil return pipe 5 is connected with the #2 bearing 2 of the gas turbine, the lower end of the oil return pipe penetrates through the base of the combustion supporting cylinder 1, a leakage point 4 is generated at the part where the oil return pipe 5 is connected with the base of the combustion supporting cylinder 1, a steel corrugated pipe 3 is wrapped outside the leakage point 4, the bottom of the steel corrugated pipe 3 is welded with a flange (not shown in the figure) on the base of the combustion supporting cylinder 1, a steel plate ((not shown in the figure)) is sealed and covered at the top of the steel corrugated pipe 3, an inner ring of the steel plate is welded with the outer wall of the oil return pipe 5, and an outer ring is welded with the top of the steel corrugated pipe 3.

Example 2:

the pull rod (which is a standard component) is arranged in the middle of the flange plates at the two ends of the steel corrugated pipe 2, the base of the combustion supporting cylinder 1 does not need to be provided with a flange at the moment, and the top of the steel corrugated pipe 3 does not need to be provided with a steel plate.

Claims

1. The utility model provides a #2 bearing returns oil pipe seal structure for PG9171E type gas turbine, including the #2 bearing that passes the PG9171E type gas turbine of burning support cylinder base returns oil pipe, return oil pipe top and connect the #2 bearing of gas turbine, the lower extreme passes burning support cylinder base, a serial communication port, the position that returns oil pipe and burning support cylinder base are connected, the outside parcel has corrugated steel pipe, corrugated steel pipe bottom and burning support cylinder base welding, corrugated steel pipe top closing cap has the steel sheet, steel sheet inner circle and the welding of returning oil pipe outer wall, outer lane and the welding of corrugated steel pipe top.

2. The #2 bearing oil return pipe sealing structure for a PG9171E gas turbine engine according to claim 1, wherein the combustion supporting cylinder base is provided with a flange plate, the oil return pipe is welded to the flange plate, and the bottom of the corrugated steel pipe is also welded to the flange plate.

3. The #2 bearing oil return pipe sealing structure for the PG9171E type gas turbine according to claim 2, wherein the two ends of the corrugated steel pipe are provided with flanges and a pull rod in the middle, and the bottom of the combustion supporting cylinder is not provided with flanges, and the top of the corrugated steel pipe is not provided with a steel plate.