A steam turbine generator top shaft device oil supply system

Abstract

The application belongs to the technical field of steam turbine generators, and particularly relates to a steam turbine generator top shaft device oil supply system. The system comprises a first oil supply circuit, a second oil supply circuit, a standby oil pump, a first flow measuring device and a second flow measuring device. The standby oil inlet ends of the standby oil pump are respectively connected to the oil inlet ports of the first oil supply circuit and the second oil supply circuit in an on-off manner. The standby oil supply ends of the standby oil pump are respectively connected to the oil supply ports of the first oil supply circuit and the second oil supply circuit in an on-off manner. The first flow measuring device is arranged on the first oil supply circuit. The second flow measuring device is arranged on the second oil supply circuit. The system of the application combines and arranges the top shaft oil supply systems of two adjacent units, thereby reducing the number of standby oil pumps and lowering the equipment investment cost. In addition, the flow measuring devices are arranged, so that the standby oil pump can be switched in time when the working oil pump fails.

Description

Technical Field

[0001] This application belongs to the field of steam turbine generator technology, specifically relating to an oil supply system for a steam turbine generator jacking device. Background Technology

[0002] The main function of the turbine generator jacking device is to inject high-pressure oil into the clearance between the journal and the bearing during turbine and generator startup, shutdown, and low-speed operation. This lifts the shaft to form an oil film, preventing dry friction, reducing starting torque, and protecting equipment safety. The jacking device ensures a smooth transition of the rotor from standstill to operating speed or from high speed to standstill, preventing low-speed bearing wear (damage to the bearing surface). It provides stable low-speed rotation conditions for maintenance or commissioning, prevents accumulated bearing wear, and ensures the safe operation of the turbine generator.

[0003] The oil supply system for the jacking shaft assembly of steam turbine generators typically uses a single-unit busbar system, requiring one working oil pump and one standby oil pump for each unit. When multiple units are located in the same turbine hall, the number of standby oil pumps is also significant, occupying considerable space and increasing equipment costs. Furthermore, in current technology, operators cannot provide early warnings of working oil pump failures; the standby pump can only be activated after a failure is confirmed, thus affecting the uninterrupted operation of the steam turbine generator and potentially causing equipment damage. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies, namely, the high cost of backup oil pumps and the inability to predict the failure of working oil pumps.

[0005] In view of this, the present invention provides an oil supply system for a turbine generator jacking device. This system can reduce the number of standby oil pumps used and can determine whether the working oil pump is malfunctioning by the change in oil flow, thereby switching the standby oil pump in a timely manner.

[0006] Specifically, the following technical solutions are included:

[0007] According to an embodiment of this application, a steam turbine generator jacking assembly oil supply system is provided, including a first oil supply circuit, a second oil supply circuit, a standby oil pump, a first flow measurement device, and a second flow measurement device; the standby oil pump's standby oil inlet is respectively connected to the oil inlet ports of the first oil supply circuit and the second oil supply circuit; the standby oil pump's standby oil supply end is respectively connected to the oil supply ports of the first oil supply circuit and the second oil supply circuit; the first flow measurement device is disposed on the first oil supply circuit; and the second flow measurement device is disposed on the second oil supply circuit.

[0008] Furthermore, the backup oil inlet is connected to the first oil inlet pipe of the first oil supply circuit via a first valve, and to the second oil inlet pipe of the second oil supply circuit via a second valve; the backup oil supply is connected to the first oil supply pipe of the first oil supply circuit via a third valve, and to the second oil supply pipe of the second oil supply circuit via a fourth valve.

[0009] Furthermore, the first oil supply circuit includes a first oil pump; the first oil inlet end of the first oil pump is connected to the first oil inlet pipeline, and the first valve is located on the flow path between the first oil inlet end and the backup oil inlet end; the first oil supply end of the first oil pump is connected to the first oil supply pipeline, and the third valve is located on the flow path between the first oil supply end and the backup oil supply end.

[0010] Furthermore, the second oil supply circuit includes a second oil pump; the second oil inlet of the second oil pump is connected to the second oil inlet pipeline, and the second valve is located on the flow path between the second oil inlet and the standby oil inlet; the second oil supply end of the second oil pump is connected to the second oil supply pipeline, and the fourth valve is located on the flow path between the second oil supply end and the standby oil supply end.

[0011] Furthermore, the first oil inlet pipe is connected to the outlet of the first oil tank, the first oil inlet end, and the backup oil inlet end; the first oil supply pipe is connected to the first oil supply end, the backup oil supply end, and the inlet of the first jacking device; the outlet of the first jacking device is connected to the inlet of the first oil tank through the first return oil pipe.

[0012] Furthermore, the second oil inlet pipe is connected to the outlet of the second oil tank, the second oil inlet end, and the backup oil inlet end; the second oil supply pipe is connected to the second oil supply end, the backup oil supply end, and the inlet of the second jacking device; the outlet of the second jacking device is connected to the inlet of the second oil tank through the second return oil pipe.

[0013] Furthermore, the first valve, the second valve, the third valve, and the fourth valve are all electric valves.

[0014] Furthermore, the first valve, the second valve, the third valve, and the fourth valve are all initially in a shut-off state.

[0015] Furthermore, when the backup oil pump supplies oil to the first oil supply circuit, the first valve and the third valve are in a connected state; when the backup oil pump supplies oil to the second oil supply circuit, the second valve and the fourth valve are in a connected state.

[0016] Furthermore, the first flow measuring device controls the opening and closing of the first valve and the third valve; the second flow measuring device controls the opening and closing of the second valve and the fourth valve.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The system of this application reduces the number of standby oil pumps by merging the top shaft oil supply systems of two adjacent units, thereby reducing equipment investment costs; and by setting up a flow measurement device, it can switch to the standby oil pump in a timely manner when the working oil pump fails. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0021] The reference numerals in the attached figures are as follows:

[0022] 1-First oil supply circuit; 11-First oil inlet pipe; 12-First oil supply pipe; 13-First oil return pipe; 2-Second oil supply circuit; 21-Second oil inlet pipe; 22-Second oil supply pipe; 23-Second oil return pipe; 3-Standby oil pump; 31-Standby oil inlet end; 32-Standby oil supply end; 41-First valve; 42-Second valve; 43-Third valve; 44-Fourth valve; 5-First oil pump; 51-First oil inlet end; 52-First oil supply end; 6-Second oil pump; 61-Second oil inlet end; 62-Second oil supply end; 71-First oil tank; 72-Second oil tank; 81-First jacking device; 82-Second jacking device; 91-First flow measurement device; 92-Second flow measurement device. Detailed Implementation

[0023] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0024] In view of this, an oil supply system for a turbine generator jacking assembly is provided according to an embodiment of this application, such as... Figure 1As shown, it includes a first oil supply circuit 1, a second oil supply circuit 2, a standby oil pump 3, a first flow measurement device 91, and a second flow measurement device 92; the standby oil pump 3's standby oil inlet 31 is configurably connected to the oil inlet ports of the first oil supply circuit 1 and the second oil supply circuit 2; the standby oil pump 3's standby oil supply end 32 is configurably connected to the oil supply ports of the first oil supply circuit 1 and the second oil supply circuit 2; the first flow measurement device 91 is mounted on the first oil supply circuit 1; and the second flow measurement device 92 is mounted on the second oil supply circuit 2.

[0025] Furthermore, in one embodiment, the backup oil inlet 31 is connected to the first oil inlet pipe 11 of the first oil supply circuit 1 via a first valve 41, and is connected to the second oil inlet pipe 21 of the second oil supply circuit 2 via a second valve 42; the backup oil supply end 32 is connected to the first oil supply pipe 12 of the first oil supply circuit 1 via a third valve 43, and is connected to the second oil supply pipe 22 of the second oil supply circuit 2 via a fourth valve 44.

[0026] Specifically, the backup oil pump 3 serves as a backup pump for both the first oil supply circuit 1 and the second oil supply circuit 2. The first flow measurement device 91 and the second flow measurement device 92 are respectively used to detect the oil flow rate of the first oil supply circuit 1 and the second oil supply circuit 2. When the first flow measurement device 91 detects an abnormal oil flow rate in the first oil supply circuit 1, the backup oil pump 3 is activated to supply oil to the first oil supply circuit 1; when the second flow measurement device 92 detects an abnormal oil flow rate in the second oil supply circuit 2, the backup oil pump 3 is activated to supply oil to the second oil supply circuit 2. The first valve 41, the second valve 42, the third valve 43, and the fourth valve 44 are respectively used to control the connection or disconnection between the backup oil inlet end 31 and the backup oil supply end 32 and the first oil supply circuit 1 and the second oil supply circuit 2.

[0027] Furthermore, in one embodiment, the first oil supply circuit 1 includes a first oil pump 5; the first oil inlet 51 of the first oil pump 5 is connected to the first oil inlet pipeline 11, and the first valve 41 is located in the flow path between the first oil inlet 51 and the backup oil inlet 31; the first oil supply 52 of the first oil pump 5 is connected to the first oil supply pipeline 12, and the third valve 43 is located in the flow path between the first oil supply 52 and the backup oil supply 32.

[0028] Furthermore, in one embodiment, the second oil supply circuit 2 includes a second oil pump 6; the second oil inlet 61 of the second oil pump 6 is connected to the second oil inlet pipeline 21, and the second valve 42 is located in the flow path between the second oil inlet 61 and the standby oil inlet 31; the second oil supply end 62 of the second oil pump 6 is connected to the second oil supply pipeline 22, and the fourth valve 44 is located in the flow path between the second oil supply end 62 and the standby oil supply end 32.

[0029] Specifically, the first oil pump 5 is the normal operating oil pump on the first oil supply circuit 1, and the second oil pump 6 is the normal operating oil pump on the second oil supply circuit 2.

[0030] Furthermore, in one embodiment, the first oil inlet pipe 11 is connected to the outlet of the first oil tank 71, the first oil inlet end 51 and the backup oil inlet end 31; the first oil supply pipe 12 is connected to the first oil supply end 52, the backup oil supply end 32 and the inlet of the first jacking device 81; the outlet of the first jacking device 81 is connected to the inlet of the first oil tank 71 through the first return oil pipe 13.

[0031] Furthermore, in one embodiment, the second oil inlet pipe 21 is connected to the outlet of the second oil tank 72, the second oil inlet end 61, and the backup oil inlet end 31; the second oil supply pipe 22 is connected to the second oil supply end 62, the backup oil supply end 32, and the inlet of the second jacking device 82; the outlet of the second jacking device 82 is connected to the inlet of the second oil tank 72 through the second return oil pipe 23.

[0032] Specifically, the first oil pump 5, the first oil inlet pipe 11, the first oil supply pipe 12, the first oil return pipe 13, the first oil tank 71, and the first jacking device 81 form the first oil supply circuit 1; the second oil pump 6, the second oil inlet pipe 21, the second oil supply pipe 22, the second oil return pipe 23, the second oil tank 72, and the second jacking device 82 form the second oil supply circuit 2.

[0033] Furthermore, in one embodiment, the first valve 41, the second valve 42, the third valve 43, and the fourth valve 44 are all electric valves.

[0034] Furthermore, in one embodiment, the first valve 41, the second valve 42, the third valve 43, and the fourth valve 44 are all initially in a cut-off state.

[0035] Furthermore, in one embodiment, when the backup oil pump 3 supplies oil to the first oil supply circuit 1, the first valve 41 and the third valve 43 are in a connected state; when the backup oil pump 3 supplies oil to the second oil supply circuit 2, the second valve 42 and the fourth valve 44 are in a connected state.

[0036] Specifically, when both the first oil supply circuit 1 and the second oil supply circuit 2 are working normally, the first oil pump 5 supplies oil to the first oil supply circuit 1; the second oil pump 6 supplies oil to the second oil supply circuit 2; the first valve 41, the second valve 42, the third valve 43 and the fourth valve 44 are all in the off state; the standby oil pump 3 is disconnected from both the first oil supply circuit 1 and the second oil supply circuit 2 and does not participate in the oil supply work. When the first flow measuring device 91 detects an abnormal flow in the first oil supply circuit 1, the first valve 41 and the third valve 43 are connected, connecting the backup oil pump 3 to the first oil supply circuit 1, and the backup oil pump 3 supplies oil to the first oil supply circuit 1, while the backup oil pump 3 remains disconnected from the second oil supply circuit 2; when the second flow measuring device 92 detects an abnormal flow in the second oil supply circuit 2, the second valve 42 and the fourth valve 44 are connected, connecting the backup oil pump 3 to the second oil supply circuit 2, and the backup oil pump 3 supplies oil to the second oil supply circuit 2, while the backup oil pump 3 remains disconnected from the first oil supply circuit 1.

[0037] Furthermore, in one embodiment, the first flow measuring device 91 controls the opening and closing of the first valve 41 and the third valve 43; the second flow measuring device 92 controls the opening and closing of the second valve 42 and the fourth valve 44.

[0038] Specifically, a control system is provided on the first flow measurement device 91 and the second flow measurement device 92. When the first flow measurement device 91 detects an abnormal flow in the first oil supply circuit 1, it automatically controls the first valve 41 and the third valve 43 to connect, and the backup oil pump 3 is started; when the second flow measurement device 92 detects an abnormal flow in the second oil supply circuit 2, it automatically controls the second valve 42 and the fourth valve 44 to connect, and the backup oil pump 3 is started.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oil supply system for a turbine generator jacking assembly, characterized in that, It includes a first oil supply circuit (1), a second oil supply circuit (2), a standby oil pump (3), a first flow measurement device (91), and a second flow measurement device (92); The standby oil pump (3) has a standby oil inlet (31) that can be switched on and off to connect to the oil inlet ports of the first oil supply circuit (1) and the second oil supply circuit (2); The standby oil pump (3) has a standby oil supply terminal (32) that can be switched on and off to connect to the oil supply ports of the first oil supply circuit (1) and the second oil supply circuit (2); The first flow measurement device (91) is installed on the first oil supply circuit (1); The second flow measurement device (92) is installed on the second oil supply circuit (2).

2. The oil supply system for the turbine generator jacking assembly according to claim 1, characterized in that, The backup oil inlet (31) is connected to the first oil inlet pipe (11) of the first oil supply circuit (1) through the first valve (41), and is connected to the second oil inlet pipe (21) of the second oil supply circuit (2) through the second valve (42); The backup oil supply terminal (32) is connected to the first oil supply line (12) of the first oil supply circuit (1) through the third valve (43), and is connected to the second oil supply line (22) of the second oil supply circuit (2) through the fourth valve (44).

3. The oil supply system for the turbine generator jacking assembly according to claim 2, characterized in that, The first oil supply circuit (1) includes a first oil pump (5); The first oil pump (5)’s first oil inlet end (51) is connected to the first oil inlet pipeline (11), and the first valve (41) is located in the flow path between the first oil inlet end (51) and the backup oil inlet end (31); The first oil pump (5) has a first oil supply end (52) connected to the first oil supply pipeline (12), and the third valve (43) is located in the flow path between the first oil supply end (52) and the backup oil supply end (32).

4. The oil supply system for the turbine generator jacking assembly according to claim 2, characterized in that, The second oil supply circuit (2) includes a second oil pump (6); The second oil pump (6) has its second oil inlet end (61) connected to the second oil inlet pipeline (21), and the second valve (42) is located in the flow path between the second oil inlet end (61) and the standby oil inlet end (31); The second oil pump (6) has a second oil supply end (62) connected to the second oil supply pipeline (22), and the fourth valve (44) is located in the flow path between the second oil supply end (62) and the standby oil supply end (32).

5. The oil supply system for the turbine generator jacking assembly according to claim 3, characterized in that, The first oil inlet pipe (11) is connected to the outlet of the first oil tank (71), the first oil inlet end (51) and the backup oil inlet end (31); The first oil supply line (12) is connected to the first oil supply end (52), the backup oil supply end (32) and the inlet of the first top shaft device (81); The outlet of the first top shaft device (81) is connected to the inlet of the first oil tank (71) through the first return oil pipeline (13).

6. The oil supply system for the turbine generator jacking assembly according to claim 4, characterized in that, The second oil inlet pipe (21) is connected to the outlet of the second oil tank (72), the second oil inlet end (61) and the spare oil inlet end (31); The second oil supply line (22) is connected to the second oil supply end (62), the backup oil supply end (32), and the inlet of the second top shaft device (82); The outlet of the second top shaft device (82) is connected to the inlet of the second oil tank (72) through the second return oil line (23).

7. The oil supply system for the turbine generator jacking assembly according to claim 2, characterized in that, The first valve (41), the second valve (42), the third valve (43) and the fourth valve (44) are all electric valves.

8. The oil supply system for the turbine generator jacking assembly according to claim 2, characterized in that, The first valve (41), the second valve (42), the third valve (43) and the fourth valve (44) are all initially in the off state.

9. The oil supply system for the turbine generator jacking assembly according to claim 8, characterized in that, When the backup oil pump (3) supplies oil to the first oil supply circuit (1), the first valve (41) and the third valve (43) are in a connected state; When the backup oil pump (3) supplies oil to the second oil supply circuit (2), the second valve (42) and the fourth valve (44) are in a connected state.

10. The oil supply system for the turbine generator jacking assembly according to claim 8, characterized in that, The first flow measurement device (91) controls the opening and closing of the first valve (41) and the third valve (43); The second flow measurement device (92) controls the opening and closing of the second valve (42) and the fourth valve (44).

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