Annular water guide oil cooler
By using stainless steel press plates and flange joints in the annular water oil conductor cooler, combined with bolted connections and flange joints with higher hardness, the problem of insufficient durability and reliability at the connections of the existing annular water oil conductor cooler is solved, and higher durability and reliability are achieved, ensuring the stable operation of the turbine unit.
Patent Information
- Application Number
- CN202422044868.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The existing annular water oil conductor coolers are insufficient in durability and reliability at the connection, which is prone to cracking due to the concentration of stresses of different metal welded joints. The welding difficulty is high and the quality is difficult to ensure, which affects the operating stability and reliability of the turbine unit.
The pressure plate and flange joint of stainless steel material are bolted to connect adjacent arc oil coolers. The pressure plate covers all areas of flange one, forming a structure that supports and fixes flange one, avoids the flange being deformed all the time, and connects external pipes through flange joints with higher hardness, improving the connection strength and pressure bearing capacity.
It improves the durability and reliability of long-term use at the joints of arc-shaped oil coolers, avoids the stress concentration problem caused by different metal welding, ensures the cooling effect, and ensures the operating stability and reliability of the turbine unit.
Smart Images
Figure CN222924540U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hydro-generator units, and particularly relates to an annular water guide oil cooler. Background Art
[0002] In a water turbine of a hydropower station, an annular water guide oil cooler is used to cool lubricating oil in a guide bearing to ensure the normal operation of a water guide shoe and a water turbine. The annular water guide oil cooler is generally formed by connecting more than two arc-shaped oil coolers end to end. For the convenience of assembly and maintenance, the ends of the pipe bodies of more than two arc-shaped oil coolers are generally connected by a flange connection method, and the whole is also flange-connected to an external pipeline. Since the pipe body material of such an oil cooler is copper, compared with a stainless steel plate, copper is more likely to deform, which easily affects the durability of the flange connection and the reliability of long-term use. If the method of welding a stainless steel flange or pipe body at the end of the pipe orifice of each arc-shaped oil cooler and then connecting through the stainless steel flange or pipe body is adopted, although the durability of the flange connection and the reliability of long-term use can be improved, since copper and stainless steel are dissimilar metals with a large difference in thermal expansion coefficient, the welding joint is prone to stress concentration and cracking, the welding difficulty is high and the welding quality is difficult to guarantee, and the weld may have defects such as pores and cracks. Once a problem occurs at the welding place, the repair and replacement are complex and costly. These problems not only affect the reliability of the water guide cooling system, but also may cause leakage of the annular water guide oil cooler, affect the cooling effect, and further affect the operation stability and reliability of the water turbine unit. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide an annular water guide oil cooler that improves the durability and reliability of the connection of arc-shaped oil coolers.
[0004] The content of the utility model includes more than two arc-shaped oil coolers. Flange one is provided at the water inlet and outlet of more than two arc-shaped oil coolers. In a single arc-shaped oil cooler, a pressing plate is arranged on the side of the flange one facing away from the flange one of another arc-shaped oil cooler. The pressing plate is sleeved on the arc-shaped oil cooler, and the material hardness of the pressing plate is greater than that of the flange one on its corresponding arc-shaped oil cooler. Adjacent two arc-shaped oil coolers are connected by a bolt one passing through the pressing plate and the flange one.
[0005] Furthermore, it also includes two flange joints. The material hardness of the two flange joints is greater than that of the flange one. One flange joint is arranged on the arc-shaped oil cooler at the water inlet end among more than two arc-shaped oil coolers for connecting an external water inlet pipeline, and the other flange joint is arranged on the arc-shaped oil cooler at the water outlet end among more than two arc-shaped oil coolers for connecting an external water return pipeline.
[0006] Furthermore, the flange joint includes a joint pipe body, a second flange provided at one end of the joint pipe body, and a third flange provided at the other end of the joint pipe body. The second flange of one flange joint is connected to the first flange and the pressing plate at the water inlet of the arc-shaped oil cooler at the water inlet end by a second bolt. The second flange of the other flange joint is connected to the first flange and the pressing plate at the water outlet of the arc-shaped oil cooler at the water outlet end by a second bolt. The third flanges of the two flange joints are used to correspondingly connect the external water inlet pipe and the external water return pipe.
[0007] Furthermore, the third flange includes a fixed disk and a movable disk. The fixed disk is fixedly provided on the joint pipe body. The movable disk is rotatably provided outside the fixed disk and / or the joint pipe body, and an installation hole is provided on the movable disk for a third bolt for connecting the external water inlet pipe or the external water return pipe to pass through.
[0008] Furthermore, the movable disk is sleeved outside the fixed disk and / or the joint pipe body. When the third bolt passes through the installation hole and is connected to the external water inlet pipe or the external water return pipe, the movable disk abuts against the fixed disk.
[0009] Furthermore, a first annular step is provided on one side of the fixed disk close to the side wall of the joint pipe body, and a second annular step matching the first annular step is provided on the inner side of one side of the movable disk facing the fixed disk.
[0010] Furthermore, the pressing plate and the flange joint are both made of stainless steel.
[0011] Furthermore, a single arc-shaped oil cooler includes a plurality of cooling pipes. The plurality of cooling pipes are arranged along their radial directions. The first flange is provided at the ends of the plurality of cooling pipes. The pressing plate is sleeved on the plurality of cooling pipes. The joint pipe body includes a manifold pipe and a plurality of branch pipes connected to the manifold pipe. The second flange is provided on the plurality of branch pipes, and the third flange is provided on the manifold pipe.
[0012] Furthermore, a single arc-shaped oil cooler further includes a fixing frame for fixing the plurality of cooling pipes.
[0013] Furthermore, a sealing ring is provided inside the first flange.
[0014] The beneficial effects of the present utility model are as follows. When the outer contour of the pressing plate is the same size as the outer contour of the first flange, the pressing plate can basically completely cover all areas of this surface of the first flange. After the first bolt is connected and locked, the pressing plate can form a structure to support and fix the first flange at the rear side of the first flange. When the material of the first flange is the same as the material of the upper tube body of the arc oil cooler, it can prevent the first flange from being directly stressed and deformed, improve the durability of the connection part of the arc oil cooler and the reliability of long-term use, and avoid problems such as stress concentration at the dissimilar metal welded joints, high welding difficulty and difficult-to-guarantee welding quality when welding other material flanges at the end of the tube body of the arc oil cooler. It also avoids leakage of the annular water-guided oil cooler caused by dissimilar metal welding quality problems, ensures the cooling effect, and thus ensures the operation stability and reliability of the water turbine unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 FIG. is a schematic structural diagram of the annular water-guided oil cooler of the present utility model.
[0016] Figure 2 FIG. is a schematic structural diagram of the first flange and the pressing plate of the present utility model.
[0017] Figure 3 For the present utility model Figure 1 Partial bottom view under a perspective view.
[0018] Figure 4 FIG. is a schematic structural diagram of the third flange of the present utility model.
[0019] In the figure: 1. Arc oil cooler; 11. Cooling tube; 12. First flange; 13. Pressing plate; 14. Sealing ring; 15. Fixed frame; 2. Flange joint; 21. Joint tube body; 22. Second flange; 23. Third flange; 231. Fixed disk; 232. Movable disk; 233. Mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] Such as Figures 1-4As shown in the figure, the present utility model provides an annular water-guided oil cooler, which includes more than two arc-shaped oil coolers 1. Flanges 12 are provided at the water inlet and outlet of more than two arc-shaped oil coolers 1. The material of the flange 12 is the same as that of the pipe body on the arc-shaped oil cooler 1 where it is located. In a single arc-shaped oil cooler 1, a pressing plate 13 is provided on the side of the flange 12 facing away from the flange 12 of another arc-shaped oil cooler 1. The pressing plate 13 is sleeved on the arc-shaped oil cooler 1, and the material hardness of the pressing plate 13 is greater than that of the flange 12 on the arc-shaped oil cooler 1 where it is located, that is, the material of the pressing plate 13 has a higher hardness than that of the flange 12. Adjacent two arc-shaped oil coolers 1 are connected by bolts 1 passing through the pressing plate 13 and the flange 12. Specifically, in two adjacent arc-shaped oil coolers 1, the bolt 1 passes through the pressing plate 13 and the flange 12 of one arc-shaped oil cooler 1, and passes through the pressing plate 13 and the flange 12 of the other arc-shaped oil cooler 1, and the end of the bolt 1 is locked by a nut, forming a structure as shown in Figure 1 and Figure 3 shown in the figure, so as to connect two adjacent arc-shaped oil coolers 1. After all arc-shaped oil coolers 1 are connected, an annular water-guided oil cooler as shown in Figure 1 is formed. Among them, in the present utility model, the bolts connecting two adjacent arc-shaped oil coolers 1 are all called bolts 1, and the number of bolts 1 is multiple, which is specifically determined according to actual connection requirements.
[0021] For the annular water-guided oil cooler provided by the present utility model, since the pressing plate 13 is sleeved on the arc-shaped oil cooler 1 and is located on the side of the flange 12 facing away from the flange 12 of another arc-shaped oil cooler 1, when the outer contour of the pressing plate 13 is the same as that of the flange 12, the pressing plate 13 can basically completely cover all areas of this surface of the flange 12. When the bolt 1 is connected and locked, the pressing plate 13 can form a structure to support and fix the flange 12 on this surface (rear side) of the flange 12, which can prevent the flange 12 from being directly stressed and deformed when the material of the flange 12 is the same as that of the pipe body on the arc-shaped oil cooler 1, improve the durability of the connection part of the arc-shaped oil cooler 1 and the reliability of long-term use, and avoid problems such as stress concentration at the dissimilar metal welded joints, high welding difficulty and difficult to guarantee welding quality when welding flanges 12 of other materials at the ends of the pipe bodies of the arc-shaped oil coolers 1, avoid leakage of the annular water-guided oil cooler due to dissimilar metal welding quality problems, ensure the cooling effect, and thus ensure the operation stability and reliability of the water turbine unit.
[0022] The arc-shaped oil cooler 1 located at the water inlet end of the annular water-guided oil cooler is the arc-shaped oil cooler 1 among two or more arc-shaped oil coolers 1 located at the water inlet end, and the arc-shaped oil cooler 1 located at the water outlet end of the annular water-guided oil cooler is the arc-shaped oil cooler 1 among two or more arc-shaped oil coolers 1 located at the water outlet end. In an embodiment of the present invention, the flange 12 and the pressing plate 13 of the water inlet of the arc-shaped oil cooler 1 located at the water inlet end are connected to the flange of the external water inlet pipe through corresponding bolts, and the flange 12 and the pressing plate 13 of the water inlet of the arc-shaped oil cooler 1 located at the water outlet end are connected to the flange of the external water outlet pipe through corresponding bolts.
[0023] In another embodiment of the present invention, different from the foregoing embodiment, the present invention further includes two flange joints 2. The material hardness of the two flange joints 2 is greater than the material hardness of the flange 12, that is, the material of the flange joint 2 has a higher hardness than the material of the flange 12. One of the flange joints 2 is arranged on the arc-shaped oil cooler 1 located at the water inlet end among two or more arc-shaped oil coolers 1 for connecting the external water inlet pipe, and the other flange joint 2 is arranged on the arc-shaped oil cooler 1 located at the water outlet end among two or more arc-shaped oil coolers 1 for connecting the external return water pipe. Since the water pressure at the water inlet end and the water outlet end of the annular water-guided oil cooler is relatively large due to the confluence reason, in this embodiment, the flange joint 2 with a higher hardness is used to correspondingly connect the external water inlet pipe and the external return water pipe, so that the connection strength at the water inlet end and the water outlet end of the annular water-guided oil cooler is higher, the pressure-bearing capacity is better, and the operation stability is higher.
[0024] In the above embodiment with two flange joints 2, the flange joint 2 includes a joint pipe body 21, a flange 22 arranged at one end of the joint pipe body 21, and a flange 23 arranged at the other end of the joint pipe body 21. The flange 22 of one of the flange joints 2 is connected to the flange 12 and the pressing plate 13 of the water inlet of the arc-shaped oil cooler 1 at the water inlet end through bolt 2. The flange 23 of this flange structure is used to connect the external water inlet pipe, and the flange 22 of the other flange joint 2 is connected to the flange 12 and the pressing plate 13 of the water outlet of the arc-shaped oil cooler 1 at the water outlet end through bolt 2. The flange 23 of this flange joint 2 is used for the external return water pipe. On the basis of using the flange joint 2 with a higher hardness to correspondingly connect the external water inlet pipe and the external return water pipe, this setting method makes the connection reliability between the flange joint 2 and the flange 12 higher, and also avoids the problems brought by dissimilar metal welding. Among them, the bolts connecting the flange joint 2 and the arc-shaped oil cooler 1 are all called bolt 2, and the number of bolt 2 is multiple, which is specifically determined according to the actual connection requirements.
[0025] The flange three 23 includes a fixed disk 231 and a movable disk 232. The fixed disk 231 is fixedly arranged on the joint pipe body 21. The movable disk 232 is rotatably arranged outside the fixed disk 231 and / or the joint pipe body 21, and an installation hole 233 is arranged on the movable disk 232 for a bolt three for connecting an external water inlet pipe or an external water return pipe to pass through. Among them, the bolts connecting the flange three 23 and the external water inlet pipe or connecting the flange three 23 and the external water return pipe are both called bolt three, and the number of bolt three is multiple, which is specifically determined according to actual connection requirements. Based on this setting method, during the overhaul and assembly process, the movable disk 232 can be rotated by a specific angle to be connected to the external water inlet pipe or the external water return pipe according to actual needs, which is convenient for installation and maintenance.
[0026] Specifically, the movable disk 232 is sleeved outside the fixed disk 231 and / or the joint pipe body 21. When the bolt three passes through the installation hole 233 and is connected to the external water inlet pipe or the external water return pipe, the movable disk 232 abuts against the fixed disk 231. With this setting method, the movable disk 232 does not need a complex rotational connection structure to axially fix with the fixed disk 231 and / or the joint pipe body 21. After the bolt three is connected and locked, the movable disk 232 abuts against the fixed disk 231 to achieve axial limit fixation.
[0027] As Figure 4 shown, a circular step one is arranged on one side of the fixed disk 231 close to the side wall of the joint pipe body 21, and a circular step two matching the circular step one is arranged on the inner side of one side of the movable disk 232 facing the fixed disk 231. Based on this setting, after the movable disk 232 abuts against the fixed disk 231, the axial dimension difference between the end faces of the movable disk 232 and the fixed disk 231 is smaller, so as to ensure meeting the connection requirements.
[0028] In the present utility model, in order to ensure the cooling effect, it is preferred that the tube material of the arc oil cooler 1 is copper. It is preferred that the materials of the pressing plate 13 and the flange joint 2 are both stainless steel, and their strength and hardness are higher than those of copper, and their durability and corrosion resistance are both good, meeting the aforementioned requirements.
[0029] In the present utility model, as Figure 2 and Figure 3 shown, a single arc oil cooler 1 includes a plurality of cooling tubes 11. The plurality of cooling tubes 11 are arranged along their own radial directions. A flange one 12 is arranged at the ends of the plurality of cooling tubes 11, and a pressing plate 13 is sleeved on the plurality of cooling tubes 11. The joint pipe body 21 includes a manifold and a plurality of branch pipes connected to the manifold. A flange two 22 is arranged on the plurality of branch pipes, and a flange three 23 is arranged on the manifold, meeting the confluence requirements of the plurality of cooling tubes 11.
[0030] Each of the arc-shaped oil coolers 1 further includes a fixing bracket 15 for fixing a plurality of cooling pipes 11 so as to keep the plurality of cooling pipes 11 in a single arc-shaped oil cooler 1 fixed. The fixing bracket 15 can be a structure such as a hoop. A partition can be arranged between each layer of cooling pipes 11 to keep a spacing, and the partition is fixed to the fixing bracket 15.
[0031] The side of the first flange 12 facing away from the pressing plate 13 is the inner side of the first flange 12. In the present utility model, a sealing ring 14 is arranged on the inner side of the first flange 12 to improve the sealing performance of the connection surface and avoid leakage.
[0032] In the present utility model, when the number of arc-shaped oil coolers 1 is two, the arc of each arc-shaped oil cooler 1 is approximately semi-circular, and the connection method can be: one of the flange joints 2 is connected to the water inlet of one of the arc-shaped oil coolers 1, the water outlet of this arc-shaped oil cooler 1 is connected to the water inlet of the other arc-shaped oil cooler 1, and the other flange joint 2 is connected to the water outlet of the other arc-shaped oil cooler 1. The connection method can also be as Figure 1 shown, each arc-shaped oil cooler 1 is in a bent shape, and its water inlet and water outlet are on the same side, and the remaining connection method is the same as the previous connection method.
[0033] When the number of arc-shaped oil coolers 1 is at least three, the water inlets and water outlets of all arc-shaped oil coolers 1 are connected in sequence. One of the flange joints 2 is connected to the water inlet of the arc-shaped oil cooler 1 at the water inlet end among all arc-shaped oil coolers 1, and the other flange joint 2 is connected to the water outlet of the arc-shaped oil cooler 1 at the water outlet end among all arc-shaped oil coolers 1.
[0034] Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; under the idea of this application, the technical features between the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.
[0035] One or more embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application shall be included within the scope of protection of this application.
Claims
1. An annular water-conducting oil cooler, characterized in that: The invention comprises two or more arc-shaped oil coolers (1), the water inlets and water outlets of the two or more arc-shaped oil coolers (1) are both provided with flanges 1 (12), and in a single arc-shaped oil cooler (1), a pressure plate (13) is provided on the side of the flange 1 (12) facing away from the flange 1 (12) of another arc-shaped oil cooler (1), the pressure plate (13) is sleeved on the arc-shaped oil cooler (1), and the material hardness of the pressure plate (13) is greater than the material hardness of the flange 1 (12) on the arc-shaped oil cooler (1), and the two adjacent arc-shaped oil coolers (1) are connected by bolts 1 passing through the pressure plate (13) and the flange 1 (12).
2. The annular water-conducting oil cooler according to claim 1 is characterized in that: It also includes two flange joints (2), the material hardness of the two flange joints (2) is greater than the material hardness of flange 1 (12), one flange joint (2) is arranged on the arc-shaped oil cooler (1) located at the water inlet end among the two or more arc-shaped oil coolers (1), and is used to connect to an external water inlet pipe, and the other flange joint (2) is arranged on the arc-shaped oil cooler (1) located at the water outlet end among the two or more arc-shaped oil coolers (1), and is used to connect to an external water return pipe.
3. The annular water-conducting oil cooler according to claim 2, characterized in that: The flange joint (2) comprises a joint body (21), a second flange (22) arranged at one end of the joint body (21), and a third flange (23) arranged at the other end of the joint body (21), wherein the second flange (22) of one flange joint (2) is connected to the first flange (12) and the pressure plate (13) of the water inlet of the arc-shaped oil cooler (1) at the water inlet end by means of two bolts, and the second flange (22) of the other flange joint (2) is connected to the first flange (12) and the pressure plate (13) of the water outlet of the arc-shaped oil cooler (1) at the water outlet end by means of two bolts, and the third flanges (23) of the two flange joints (2) are used to connect to an external water inlet pipe and an external water return pipe respectively.
4. The annular water-conducting oil cooler according to claim 3 is characterized in that: The flange three (23) comprises a fixed disk (231) and a movable disk (232), wherein the fixed disk (231) is fixedly arranged on the joint pipe body (21), and the movable disk (232) is rotatably arranged on the outside of the fixed disk (231) and / or the joint pipe body (21), and a mounting hole (233) is arranged on the movable disk (232) for allowing a bolt three for connecting an external water inlet pipe or an external water return pipe to pass through.
5. The annular water-conducting oil cooler according to claim 4 is characterized in that: The movable plate (232) is sleeved on the outside of the fixed plate (231) and / or the joint pipe body (21), and when the bolts pass through the mounting holes (233) to connect with the external water inlet pipe or the external water return pipe, the movable plate (232) abuts against the fixed plate (231).
6. The annular water-conducting oil cooler according to claim 5, characterized in that: A first annular step is provided on one side of the fixed disk (231) close to the side wall of the joint tube body (21), and a second annular step matching the first annular step is provided on the inner side of one side of the movable disk (232) facing the fixed disk (231).
7. The annular water-conducting oil cooler according to any one of claims 3 to 6, characterized in that: The pressing plate (13) and the flange joint (2) are both made of stainless steel.
8. The annular water-conducting oil cooler according to claim 7 is characterized in that: The single arc-shaped oil cooler (1) comprises a plurality of cooling tubes (11), the plurality of cooling tubes (11) are arranged along their own radial direction, flange one (12) is arranged at the ends of the plurality of cooling tubes (11), a pressure plate (13) is sleeved on the plurality of cooling tubes (11), the joint pipe body (21) comprises a manifold and a plurality of branch pipes connected to the manifold, flange two (22) is arranged on the plurality of branch pipes, and flange three (23) is arranged on the manifold.
9. The annular water-conducting oil cooler according to claim 8, characterized in that: Each of the arc-shaped oil coolers (1) further comprises a fixing frame (15) for fixing a plurality of cooling pipes (11).
10. The annular water-conducting oil cooler according to any one of claims 1 to 6, 8 and 9, characterized in that: A sealing ring (14) is arranged on the inner side of the flange 1 (12).