Emergency oil recharging device for jacking oil pump of steam turbine

Abstract

The utility model discloses a steam turbine top shaft oil pump emergency oil recharging device, which relates to the technical field of steam turbines, and comprises a main engine lubricating oil tank and an oil purification device, one side of the oil purification device is provided with one end of a shunting pipe fitting II, and the other end of the shunting pipe fitting II is connected with the main engine lubricating oil tank; one end of the main engine lubricating oil tank is connected with a backflow pipe fitting, the other side of the backflow pipe fitting is connected with the output end of an electromagnetic valve, a separation cavity is formed in the main engine lubricating oil tank, one side of the separation cavity is connected with one end of a second flow dividing pipe fitting in a penetrating mode, and a separation mechanism is arranged in the main engine lubricating oil tank. According to the optimization of the technical scheme, the cost of related equipment such as a newly-added top shaft electromagnetic pump, a motor, matched cables and electromagnetic pump accessories and the civil engineering cost are directly reduced, the cost is saved, meanwhile, the daily maintenance and overhaul workload of newly-added oil system equipment is reduced, the system is simplified, and the equipment reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to an emergency oil replenishing device for a top shaft oil pump of a steam turbine. Background Art

[0002] The oil source of the top shaft electromagnetic pump is supplied by the large AC and DC lubrication electromagnetic pump, which prevents low-speed grinding of the bearing during the shutdown and speed reduction of the steam turbine generator set. The pressure of the top shaft oil bag during operation represents the oil film pressure of the bearing at that point, which is one of the important parameters for monitoring the changes in the shaft system elevation and the distribution of bearing load.

[0003] The inlet pipes of the main machine top shaft electromagnetic pumps of the four units in our plant are all connected to the outlet pipes of the main machine AC and DC electromagnetic pumps. Taking the second phase as an example, the top shaft electromagnetic pumps of the #5 and #6 units are arranged 6.9 meters in the steam turbine room, which is higher than the main oil tank of the main machine. They can only operate after the main machine lubrication electromagnetic pump is started and the oil pressure is established at the inlet of the top shaft electromagnetic pump; if the main machine AC and DC electromagnetic pumps do not meet the starting conditions, the top shaft electromagnetic pump cannot be started, the equipment reliability is low, and the main shaft bending accident will occur. The existing oil storage tanks can often only temporarily transfer the oil-liquid mixture, but cannot perform preliminary separation of the oil and accumulated water, thereby extending the time period for subsequent recovery and treatment of the oil-liquid mixture. Summary of the Invention

[0004] The purpose of the utility model is to provide an emergency oil replenishing device for a top shaft oil pump of a steam turbine, so as to solve the above-mentioned defects caused by the prior art.

[0005] A steam turbine top shaft oil pump emergency oil replenishing device includes a main engine lubricating oil tank and an oil purification device, wherein one side of the oil purification device is provided with one end of a diverter pipe fitting 2, and the other end of the diverter pipe fitting 2 is connected to the main engine lubricating oil tank, one end of the main engine lubricating oil tank is connected to a return pipe fitting, and the other side of the return pipe fitting is connected to the output end of a solenoid valve, a partition chamber is installed inside the main engine lubricating oil tank, one side of the partition chamber is penetrated and connected with one end of the diverter pipe fitting 2, and a partition mechanism is provided inside the main engine lubricating oil tank, and the partition mechanism separates the internal oil of the main engine lubricating oil tank, thereby preventing the oil from mixing together, thereby causing the refluxed oil to contaminate the purified oil.

[0006] Preferably, the oil purification device is connected to the outside of the main engine lubricating oil tank through a diverter pipe.

[0007] Preferably, the partition mechanism includes a partition chamber, a frame, a slot, a fastening hole and an oil filter element. The interior of the partition chamber is symmetrically provided with a slot, the outer side of the slot is connected to the frame, the inner end of the frame is connected to the oil filter element, and the outer side of the frame is provided with fastening holes at equal intervals.

[0008] Preferably, a frame provided on the outer side of the oil filter element is connected to the outer side of the slot.

[0009] Preferably, the frame is connected to the partition chamber via fastening holes arranged at equal intervals.

[0010] Preferably, the diversion pipe is connected to the input end of the electromagnetic pump through a purification pipe provided on one side.

[0011] Preferably, the output end of the electromagnetic pump is connected to multiple groups of jacking oil pipelines.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The optimization of this technical solution directly reduces the cost of related equipment such as the newly added top shaft electromagnetic pump, motor and supporting cables, electromagnetic pump accessories, and civil engineering costs, saving costs. At the same time, it reduces the workload of daily maintenance and overhaul of the newly added oil system equipment, which simplifies the system and improves equipment reliability. It reduces the cost of related equipment including the newly added top shaft electromagnetic pump, motor and supporting cables, stainless steel pipelines, and civil engineering costs, and reduces the workload of daily maintenance and overhaul of the newly added equipment system.

[0014] 2. During use, the injected oil filter element is positioned through the slots arranged at equal intervals, which facilitates the rapid disassembly and replacement of multiple groups of oil filter elements and frames. The oil is separated by the separation chamber, thereby completing the preliminary separation of oil and impurities in the oil-liquid mixture. This not only facilitates the subsequent centralized treatment of oil and impurities, but also shortens the recovery and treatment cycle of the oil-liquid mixture and improves the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the main engine lubricating oil tank in the present utility model.

[0017] Figure 3 It is a structural schematic diagram of the oil filter element itself in the utility model.

[0018] Figure 4 This is a schematic structural diagram of the partition chamber itself in the present invention.

[0019] in:

[0020] 1. Main engine lubricating oil tank; 2. Oil purification device; 3. Purification pipe fittings; 4. Diverter pipe fitting 1; 5. Diverter pipe fitting 2; 6. Return pipe fittings; 7. Solenoid valve; 8. Solenoid pump; 9. Top shaft oil pipeline; 10. Separation mechanism; 11. Separation chamber; 12. Frame; 13. Slot; 14. Fastening hole; 15. Oil filter element. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 4 As shown, an emergency oil replenishment device for a steam turbine top shaft oil pump includes a main engine lubricating oil tank 1 and an oil purification device 2. One side of the oil purification device 2 is provided with one end of a diverter pipe 5, and the other end of the diverter pipe 5 is connected to the main engine lubricating oil tank 1. One end of the main engine lubricating oil tank 1 is connected to a return pipe 6, and the other side of the return pipe 6 is connected to the output end of a solenoid valve 7. A partition chamber 11 is installed inside the main engine lubricating oil tank 1, and one side of the partition chamber 11 is connected to one end of the diverter pipe 5;

[0023] In this embodiment, a separation mechanism 10 is provided inside the main engine lubricating oil tank 1, and the separation mechanism 10 separates the oil inside the main engine lubricating oil tank 1, thereby preventing the oil from mixing together, thereby causing the refluxed oil to contaminate the purified oil.

[0024] In this embodiment, the oil purification device 2 is connected to the outer side of the main engine lubricating oil tank 1 through a diverter pipe 4, and the oil purification device 2 is used to circulate and purify the oil.

[0025] The partition mechanism 10 includes a partition chamber 11, a frame 12, a slot 13, a fastening hole 14 and an oil filter element 15. The slots 13 are symmetrically opened inside the partition chamber 11, the outer side of the slot 13 is connected to the frame 12, the inner end of the frame 12 is connected to the oil filter element 15, and fastening holes 14 are opened at equal intervals on the outer side of the frame 12. The circulating oil is purified through the partition chamber 11 to avoid oil contamination.

[0026] In this embodiment, the frame 12 provided on the outer side of the oil filter 15 is connected to the outer side of the slot 13 , and the oil filter 15 is used to remove impurities from the circulating oil to prevent the oil from contaminating the new oil.

[0027] In this embodiment, the frame 12 is connected to the partition chamber 11 through fastening holes 14 arranged at equal intervals. The two sides of the frame 12 are positioned through the fastening holes 14 to facilitate quick disassembly of the frame 12.

[0028] In this embodiment, the diverter pipe 4 is connected to the input end of the electromagnetic pump 8 through the purification pipe 3 provided on one side, and the purified oil is directly returned to the interior of the main engine lubricating oil tank 1 through the diverter pipe 4.

[0029] In this embodiment, the output end of the electromagnetic pump 8 is connected to multiple groups of jacking oil pipelines 9.

[0030] The actual application of this steam turbine top shaft oil pump emergency oil replenishment device includes the following work contents:

[0031] Step 1: During use, first, the oil in the main engine lubricating oil tank 1 is directly injected into the interior of the electromagnetic pump 8 through the purification pipe 3, and the oil is directly injected into the interior of multiple groups of jacking oil pipelines 9 through the electromagnetic pump 8. The jacking oil pipeline 9 is used to control the return oil through the electromagnetic valve 7 set on one side. The electromagnetic valve 7 is used to return the excess oil directly to the interior of the partition chamber 11 set inside the main engine lubricating oil tank 1. When the oil is purified, it overflows and flows back to another part of the main engine lubricating oil tank 1;

[0032] Step 2: The operator installs the oil filter element 15 and the frame 12 inside the slot 13 according to the shape of the reflux, positions both sides of the frame 12 through the slot 13, and uses bolts inserted into the fastening holes 14 to lock the outer side of the frame 12. When the reflux liquid is directly purified by the oil filter element 15, it is discharged through the drain valve in the oil filter element 15;

[0033] Step 3: When the oil inside the main engine lubricating oil tank 1 needs to be purified by the oil purification device 2, the oil is injected into the oil purification device 2 through the diverter pipe 4 set on one side. After the impurities in the oil are fully processed by the oil purification device 2, the oil is injected into the main engine lubricating oil tank 1 through the diverter pipe 4 set on one side, and the oil is stored in the main engine lubricating oil tank 1.

[0034] Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An emergency oil replenishing device for a steam turbine top shaft oil pump, characterized in that: The invention comprises a main engine lubricating oil tank (1) and an oil purification device (2), wherein one end of a second diverter pipe (5) is provided on one side of the oil purification device (2), the other end of the second diverter pipe (5) is connected to the main engine lubricating oil tank (1), one end of the main engine lubricating oil tank (1) is connected to a return pipe (6), the other side of the return pipe (6) is connected to the output end of a solenoid valve (7), a partition chamber (11) is installed inside the main engine lubricating oil tank (1), and one side of the partition chamber (11) is connected to one end of the second diverter pipe (5); A separation mechanism (10) is provided inside the main engine lubricating oil tank (1), and the separation mechanism (10) separates the oil inside the main engine lubricating oil tank (1), thereby preventing the oil from mixing together, thereby preventing the refluxed oil from contaminating the purified oil.

2. The emergency oil replenishing device for a steam turbine top shaft oil pump according to claim 1, characterized in that: The oil purification device (2) is connected to the outside of the main engine lubricating oil tank (1) via a diverter pipe (4).

3. The emergency oil replenishing device for a steam turbine top shaft oil pump according to claim 1, characterized in that: The partition mechanism (10) comprises a partition chamber (11), a frame (12), a slot (13), a fastening hole (14) and an oil filter element (15); the slots (13) are symmetrically provided inside the partition chamber (11); the outer side of the slots (13) is connected to the frame (12); the inner end of the frame (12) is connected to the oil filter element (15); and the outer side of the frame (12) is provided with fastening holes (14) at equal intervals.

4. The emergency oil replenishing device for the top shaft oil pump of a steam turbine according to claim 3, characterized in that: The frame (12) arranged on the outer side of the oil filter element (15) is connected to the outer side of the slot (13).

5. The emergency oil replenishing device for the top shaft oil pump of a steam turbine according to claim 3, characterized in that: The frame (12) is connected to the partition chamber (11) via fastening holes (14) arranged at equal intervals.

6. The emergency oil replenishing device for the top shaft oil pump of a steam turbine according to claim 2, characterized in that: The diversion pipe piece (4) is connected to the input end of the electromagnetic pump (8) through a purification pipe piece (3) provided on one side.

7. The emergency oil replenishing device for the top shaft oil pump of a steam turbine according to claim 6, characterized in that: The output end of the electromagnetic pump (8) is connected to a plurality of groups of jacking oil pipelines (9).

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