Hydropower unit upper and lower guide bearing oil cooling device

Abstract

The utility model discloses a kind of upper and lower guide bearing oil cooling devices of hydropower station unit, it is related to the cooling technical field of hydroelectric equipment, including upper end plate, lower end plate, cooler pipe shell, multiple cooling pipes, upper end cover and lower end cover, the inside of upper end cover is separated into upper seepage chamber and water outlet chamber by upper partition, the inside of lower end cover is separated into lower seepage chamber and water inlet bin by lower partition, and water inlet bin is formed with water inlet chamber one and water inlet chamber two by partition plate;The bottom end of lower end cover is provided with water inlet pipe one and water inlet pipe two, water drain pipe one is installed on upper end cover, water drain pipe two is also branched on water drain pipe one, the cooler pipe shell of the design adopts double-pipeline parallel structure and shortens process, selects big pipe diameter red copper pipe, reduces deposition area, with good heat conduction performance, increase the contact area of cooling medium and oil, improve cooling efficiency, can also effectively reduce dirt deposition simultaneously, in addition, realize reverse flushing by switching valve flow direction, realize automatic dirt cleaning.

Description

Technical Field

[0001] This utility model relates to the field of hydropower equipment cooling, and in particular to an oil cooling device for the upper and lower guide bearings of a hydropower station unit. Background Technology

[0002] Existing bearing oil coolers in hydropower stations generally adopt a single-tube coiled or multi-tube expansion joint structure, which presents the following key problems:

[0003] First, the cooling water pipes are long and thin (about 20m) with a small diameter (Φ17mm). When the river water contains silt or microorganisms, scale is easily deposited and formed inside the pipes, resulting in a decrease in flow rate and a sharp reduction in cooling efficiency, requiring frequent shutdowns for flushing (3-4 times per year).

[0004] Secondly, on the one hand, defects in the expansion joint process are difficult to detect, and long-term vibration can easily cause the cooling pipe and the baffle to separate; on the other hand, the cooling water pressure is higher than the oil pressure, and when there is a leak, the cooling water will seep into the oil tank, causing the lubricating oil to emulsify, and even leading to a bearing failure (such as a power plant unit that once burned its bearing due to a leak).

[0005] Furthermore, the single-tube coil structure cannot thoroughly clean the adhered dirt, which may eventually lead to the failure of the cooler.

[0006] To address the aforementioned problems, this utility model provides an oil cooling device for the upper and lower guide bearings of a hydropower station unit. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides an oil cooling device for the upper and lower guide bearings of hydropower station units, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a cooling device for upper and lower guide bearing oil of a hydropower station unit, comprising an upper end plate and a lower end plate, wherein a cooler shell is connected between the upper end plate and the lower end plate, and multiple cooling pipes are evenly distributed within the cooler shell between the upper end plate and the lower end plate, wherein the cooling pipes are a dual-pipe parallel structure;

[0009] The upper end plate is equipped with an upper end cover, and the interior of the upper end cover is divided into an upper seepage chamber and an outlet chamber by an upper partition plate.

[0010] The bottom end of the lower end plate is provided with a lower end cover. The interior of the lower end cover is divided into a lower seepage chamber and a water inlet chamber by a lower partition. The water inlet chamber is further divided into a water inlet chamber one and a water inlet chamber two by a partition.

[0011] The bottom end of the lower end cover is provided with a water inlet pipe 1 and a water inlet pipe 2. The upper end cover is equipped with a drain pipe 1. The other end of the drain pipe 1 is connected to the water inlet pipe 2. The drain pipe 1 also branches off to the drain pipe 2.

[0012] As a further technical solution of this utility model, an oil inlet pipe and an oil outlet pipe are respectively installed at the upper and lower ends of the cooler shell.

[0013] The cooler shell is composed of a semi-circular tube one and a semi-circular tube two. The two end faces of the semi-circular tube one are provided with slots, and the two end faces of the semi-circular tube two are provided with blocks. The semi-circular tube one and the semi-circular tube two are locked together by the slots and blocks. When locked together, a cooling chamber is formed between the semi-circular tube one and the semi-circular tube two. One end of the oil inlet pipe and the oil outlet pipe are connected to the cooling chamber.

[0014] As a further technical solution of this utility model, both ends of the first and second semicircular tubes are welded with semicircular flanges, and the surface edges of the upper and lower end plates are provided with multiple screw holes in a circular shape. The two ends of the first and second semicircular tubes are fixed to the upper and lower end plates by semicircular flanges and bolts.

[0015] As a further technical solution of this utility model, the top end of the cooling pipe passes through the upper seepage cavity and is connected to the inside of the water outlet cavity, and the bottom end of the cooling pipe passes through the lower partition and is connected to the water inlet chamber.

[0016] As a further technical solution of this utility model, the cooling pipe is a Φ20mm copper pipe.

[0017] As a further technical solution of this utility model, control valves are installed on the first and second water inlet pipes, as well as the first and second drain pipes. One end of the first drain pipe is connected to the water outlet chamber, one end of the first water inlet pipe is connected to the first water inlet chamber, and one end of the second water inlet pipe is connected to the second water inlet chamber.

[0018] As a further technical solution of this utility model, both the upper and lower seepage cavities are provided with transparent windows, and both the upper and lower seepage cavities are provided with observation holes and external overflow pipes.

[0019] This utility model provides an oil cooling device for the upper and lower guide bearings of a hydropower station unit, which has the following advantages compared with the prior art:

[0020] 1. This design is a cooling device for the upper and lower guide bearing oil of a hydropower station unit. The cooler shell adopts a split structure in which semi-circular tube one and semi-circular tube two are sealed by clamping grooves and clamping blocks, and are fixed to the upper and lower end plates by semi-circular flanges and bolts, which facilitates disassembly and maintenance. When internal components malfunction, they can be quickly disassembled for repair.

[0021] 2. This design is a cooling device for the upper and lower guide bearing oil of a hydropower station unit. The cooling pipe adopts a dual-pipe parallel structure and shortens the flow path. At the same time, large-diameter copper pipes are selected to reduce the deposition area. Copper pipes have good thermal conductivity. The dual-pipe parallel design increases the contact area between the cooling medium and the oil, improves the cooling efficiency, and can also effectively reduce dirt deposition. In addition, reverse flushing is achieved by switching the valve flow direction to realize automatic dirt removal.

[0022] 3. The oil cooling device for the upper and lower guide bearings of a hydropower station unit designed in this paper constructs a double-layer baffle seepage monitoring chamber by setting an upper baffle in the upper end cover to form an upper seepage chamber and setting a lower baffle in the lower end cover to form a lower seepage chamber; once the expansion joint leaks, oil or water will seep into the seepage chamber and flow out from the observation hole, realizing early warning and avoiding systemic oil-water mixing. Attached Figure Description

[0023] Figure 1 A first structural view of an oil cooling device for the upper and lower guide bearings of a hydropower station unit.

[0024] Figure 2 This is a second structural view of an oil cooling device for the upper and lower guide bearings of a hydropower station unit.

[0025] Figure 3 This is a disassembly diagram of the cooler tube shell in the upper and lower guide bearing oil cooling device of a hydropower station unit.

[0026] Figure 4 This is a schematic diagram of the installation of cooling pipes in an oil cooling device for the upper and lower guide bearings of a hydropower station unit.

[0027] Figure 5 for Figure 4 Side view;

[0028] Figure 6 This is a schematic diagram of the cooling pipe structure in the oil cooling device for the upper and lower guide bearings of a hydropower station unit.

[0029] In the diagram: 1. Cooler shell; 11. Semicircular tube one; 12. Semicircular tube two; 2. Oil inlet pipe; 21. Oil outlet pipe; 3. Upper end plate; 31. Lower end plate; 4. Upper end cover; 41. Upper partition plate; 42. Upper seepage chamber; 43. Water outlet chamber; 5. Cooling pipe; 6. Lower end cover; 61. Lower partition plate; 62. Water inlet chamber one; 63. Water inlet chamber two; 64. Lower seepage chamber; 65. Partition plate; 7. Water inlet pipe one; 8. Water inlet pipe two; 81. Drain pipe one; 82. Drain pipe two; 9. Control valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-6 This utility model provides a technical solution for a cooling device for the upper and lower guide bearing oil of a hydropower station unit: A cooling device for the upper and lower guide bearing oil of a hydropower station unit includes an upper end plate 3 and a lower end plate 31. A cooler shell 1 is connected between the upper end plate 3 and the lower end plate 31. An oil inlet pipe 2 and an oil outlet pipe 21 are respectively installed at the upper and lower ends of the cooler shell 1 to facilitate the entry of the upper and lower guide bearing oil and facilitate its cooling.

[0032] The cooler shell 1 is composed of a semi-circular tube 11 and a semi-circular tube 2 12. The two end faces of the semi-circular tube 11 are provided with slots, and the two end faces of the semi-circular tube 2 12 are provided with blocks. The semi-circular tube 11 and the semi-circular tube 2 12 are locked together by the slots and blocks. When locked together, a cooling chamber is formed between the semi-circular tube 11 and the semi-circular tube 2 12. One end of the oil inlet pipe 2 and the oil outlet pipe 21 are connected to the cooling chamber. The cooler shell 1 is improved from the traditional one-piece type to a splicing type of two semi-circular tubes. The splicing is fixed by the locking blocks and slots. With the help of the sealing strip, a seal can be achieved after locking together to prevent oil leakage.

[0033] Both ends of the semicircular tube 11 and the semicircular tube 2 are welded with semicircular flanges. The upper end plate 3 and the lower end plate 31 have multiple screw holes in a circular shape on their surface edges. The two ends of the semicircular tube 11 and the semicircular tube 2 are fixed to the upper end plate 3 and the lower end plate 31 by the semicircular flanges and bolts. The use of the semicircular flanges at both ends can facilitate the disassembly and assembly of the cooler tube shell 1, realize modular disassembly, and facilitate the disassembly and cleaning of stubborn dirt inside the tube.

[0034] Multiple cooling pipes 5 are evenly distributed between the upper end plate 3 and the lower end plate 31 inside the cooler shell 1. The cooling pipes 5 are a dual-pipe parallel structure. The cooling pipes 5 are Φ20mm copper pipes. The top end of the cooling pipe 5 passes through the upper seepage cavity 42 and is connected to the inside of the water outlet cavity 43. The bottom end of the cooling pipe 5 passes through the lower partition 61 and is connected to the water inlet chamber. The upper end plate 3 is equipped with an upper end cover 4. The inside of the upper end cover 4 is divided into the upper seepage cavity 42 and the water outlet cavity 43 by the upper partition 41.

[0035] The bottom end of the lower end plate 31 is provided with a lower end cover 6. The interior of the lower end cover 6 is divided into a lower seepage chamber 64 and a water inlet chamber by a lower partition 61. The water inlet chamber is further divided into a first water inlet chamber 62 and a second water inlet chamber 63 by a partition 65. Both the upper seepage chamber 42 and the lower seepage chamber 64 are provided with transparent windows and observation holes. Both are connected to an overflow pipe. Once the expansion joint leaks, oil / water seeps into the chamber and flows out from the observation hole, thus achieving early warning.

[0036] The bottom end of the lower cover 6 is provided with a water inlet pipe 7 and a water inlet pipe 8. The upper cover 4 is equipped with a drain pipe 81. The other end of the drain pipe 81 is connected to the water inlet pipe 8. A drain pipe 82 is also branched from the drain pipe 81. Control valves 9 are installed on the water inlet pipe 7, the water inlet pipe 8, the drain pipe 81, and the drain pipe 82. One end of the drain pipe 81 is connected to the water outlet chamber 43. One end of the water inlet pipe 7 is connected to the water inlet chamber 62. One end of the water inlet pipe 8 is connected to the water inlet chamber 63. It should be noted that, as shown in the attached figure, the drain pipe 82 is located between the control valve 9 on the drain pipe 81 and the upper cover 4.

[0037] The working principle of this utility model is as follows:

[0038] During normal operation: Open the control valves 9 on the inlet pipe 7, the inlet pipe 8, and the drain pipe 82, and close the control valve 9 on the drain pipe 81. Cooling water enters the inlet chamber 62 through the inlet pipe 7, enters the inlet chamber 63 through the inlet pipe 8, and then enters the cooling pipe 5. The cooling water flows in the cooling pipe 5, exchanges heat with the lubricating oil in the cooling chamber, absorbs heat, flows upward to the outlet chamber 43, and then enters the drain pipe 82 through the drain pipe 81 and is discharged from the drain pipe 82.

[0039] During backwashing: When cleaning is required, the control valve 9 on drain pipe 81 and inlet pipe 7 is opened by the external PLC controller, and the control valve 9 on inlet pipe 8 and drain pipe 82 is closed, so that high-pressure water enters drain pipe 81 from inlet pipe 82, then flows back into outlet chamber 43, and then flows down through cooling pipe 5 to rinse. The dirt is discharged from inlet chamber 62 and inlet pipe 7 with the water flow, realizing automatic backwashing without stopping the machine.

[0040] Alternatively, the control valve 9 on drain pipe 1 81 and inlet pipe 1 7 can be closed, while the control valve 9 on drain pipe 2 82 and inlet pipe 2 8 can be opened, allowing high-pressure water to enter from drain pipe 2 82. The dirt will then enter the outlet chamber 43 with the water flow, be flushed downwards through the cooling pipe 5, enter the inlet chamber 2 63, and finally be discharged from inlet pipe 2 8, thus achieving the backwashing function.

[0041] It can also control the opening of the control valve 9 on the first water inlet pipe 7 and the second water inlet pipe 8, and close the control valve 9 on the first drain pipe 81, so that high-pressure water enters from the second drain pipe 82, and the dirt enters the outlet chamber 43 with the water flow, is flushed downward through the cooling pipe 5, enters the second water inlet chamber 63 and the first water inlet chamber 62, and is finally discharged through the first water inlet pipe 7 and the second water inlet pipe 8, thus realizing the backwashing function;

[0042] Furthermore, during use, the transparent windows and observation holes on the upper seepage chamber 42 and the lower seepage chamber 64 allow for real-time observation of whether oil or water has seeped in; if a leak occurs, the fluid in the seepage chamber can be discharged through an external overflow pipe, providing timely warning.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A cooling device for the upper and lower guide bearing oil of a hydropower station unit, characterized in that, It includes an upper end plate (3) and a lower end plate (31), and a cooler shell (1) is connected between the upper end plate (3) and the lower end plate (31). Multiple cooling pipes (5) are evenly distributed between the upper end plate (3) and the lower end plate (31) inside the cooler shell (1). The cooling pipes (5) are a dual-pipe parallel structure. The upper end plate (3) is equipped with an upper end cover (4), and the interior of the upper end cover (4) is divided into an upper seepage chamber (42) and an outlet chamber (43) by an upper partition (41). The bottom end of the lower end plate (31) is provided with a lower end cover (6). The interior of the lower end cover (6) is divided into a lower seepage chamber (64) and a water inlet chamber by a lower partition (61). The water inlet chamber is further divided into a water inlet chamber one (62) and a water inlet chamber two (63) by a partition (65). The bottom end of the lower end cover (6) is provided with a water inlet pipe 1 (7) and a water inlet pipe 2 (8). The upper end cover (4) is equipped with a drain pipe 1 (81). The other end of the drain pipe 1 (81) is connected to the water inlet pipe 2 (8). The drain pipe 1 (81) is also branched with a drain pipe 2 (82).

2. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 1, characterized in that, The upper and lower ends of the cooler shell (1) are respectively equipped with an oil inlet pipe (2) and an oil outlet pipe (21). The cooler shell (1) is composed of a semi-circular tube one (11) and a semi-circular tube two (12). The two end faces of the semi-circular tube one (11) are provided with slots, and the two end faces of the semi-circular tube two (12) are provided with blocks. The semi-circular tube one (11) and the semi-circular tube two (12) are locked together by the slots and blocks. When locked together, a cooling chamber is formed between the semi-circular tube one (11) and the semi-circular tube two (12). One end of the oil inlet pipe (2) and the oil outlet pipe (21) are connected to the cooling chamber.

3. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 2, characterized in that, Both ends of the first semicircular tube (11) and the second semicircular tube (12) are welded with semicircular flanges. The upper end plate (3) and the lower end plate (31) have multiple screw holes in a circular shape on their surface edges. The two ends of the first semicircular tube (11) and the second semicircular tube (12) are fixed to the upper end plate (3) and the lower end plate (31) by semicircular flanges and bolts.

4. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 1, characterized in that, The top end of the cooling pipe (5) passes through the upper seepage cavity (42) and is connected to the inside of the water outlet cavity (43), and the bottom end of the cooling pipe (5) passes through the lower partition (61) and is connected to the water inlet chamber.

5. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 1, characterized in that, The cooling pipe (5) is a Φ20mm copper pipe.

6. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 1, characterized in that, Control valves (9) are installed on the first water inlet pipe (7) and the second water inlet pipe (8), as well as the first drain pipe (81) and the second drain pipe (82). One end of the first drain pipe (81) is connected to the outlet chamber (43), one end of the first water inlet pipe (7) is connected to the first water inlet chamber (62), and one end of the second water inlet pipe (8) is connected to the second water inlet chamber (63).

7. The oil cooling device for upper and lower guide bearings of a hydropower station unit according to claim 1, characterized in that, Both the upper seepage cavity (42) and the lower seepage cavity (64) are provided with transparent windows, and both the upper seepage cavity (42) and the lower seepage cavity (64) are provided with observation holes and external overflow pipes.

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