Bearing chamber structure

Abstract

The utility model discloses a bearing chamber structure, which relates to the technical field of centrifugal pumps and comprises a bearing chamber main body and a bearing seat for mounting a bearing, one end of the bearing chamber main body is provided with a mounting cavity, the other end of the bearing chamber main body is provided with a connecting port communicated with the mounting cavity, and the bearing seat is arranged in the mounting cavity. A lubricating oil cavity is formed between one end of the bearing seat and the mounting cavity, a lubricating oil inlet and a lubricating oil outlet which are communicated with the lubricating oil cavity are formed in the bearing chamber main body, a cooling gas cavity is formed between the other end of the bearing seat and the inner side wall of the mounting cavity, and a cooling gas inlet and a cooling gas outlet which are communicated with the cooling gas cavity are formed in the bearing chamber main body; a first sealing cover structure used for sealing the connecting port is arranged at the connecting port, a second sealing cover structure used for sealing the cooling gas cavity is arranged in the mounting cavity, and the problems that when a bearing chamber of an existing multi-stage centrifugal pump is used, the heat dissipation effect is poor, bearing abrasion is prone to being intensified, lubricating performance is degraded, and even bearing faults are caused are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump technical field especially is related to a bearing chamber structure. BACKGROUND

[0002] In the complex process of oilfield exploitation, multistage centrifugal pumps play a very critical role. From the oil extraction link to the long-distance transportation of oil and gas mixture, to water injection and other fluid injection operations, multistage centrifugal pumps support the efficient and uninterrupted operation of the oilfield production system with their unique design. The reliability of their performance directly affects the overall productivity and economic benefits of oilfield operations.

[0003] The bearing chamber, as the core component of the multistage centrifugal pump, houses the bearings that support the rotation of the pump shaft. During operation, the bearings rotate at high speed and bear heavy loads, generating a large amount of heat in the process. If the heat accumulated in the bearing chamber cannot be effectively dissipated in time, the bearing temperature will continue to rise. In a high-temperature environment, the bearings face a series of problems such as accelerated wear and tear, deteriorating lubrication performance, and even bearing failure.

[0004] Therefore, improving the heat dissipation effect of the traditional multistage centrifugal pump bearing chamber has become a key problem that needs to be solved urgently in the oilfield industry. SUMMARY

[0005] To solve the above problems, the utility model provides a bearing chamber structure, which solves the problem of poor heat dissipation effect of the bearing chamber of the current multistage centrifugal pump, which can cause accelerated wear and tear of the bearings, deteriorating lubrication performance, and even bearing failure.

[0006] The technical scheme of the utility model is as follows:

[0007] A bearing chamber structure includes a bearing chamber main body and a bearing seat for installing bearings. One end of the bearing chamber main body is provided with an installation cavity, and the other end is provided with a connecting port communicating with the installation cavity. The bearing seat is arranged in the installation cavity and fixedly connected with the installation cavity. The bearing seat is provided with an installation port for installing bearings, and the bearings can be installed in the installation port.

[0008] A lubricating oil cavity is provided between one end of the bearing seat and the installation cavity. The lubricating oil cavity is located at one end of the installation cavity close to the connecting port and communicates with the connecting port. The bearing chamber main body is provided with a lubricating oil inlet and a lubricating oil outlet communicating with the lubricating oil cavity. A cooling gas cavity is provided between the other end of the bearing seat and the inner side wall of the installation cavity. The bearing chamber main body is provided with a cooling gas inlet and a cooling gas outlet communicating with the cooling gas cavity.

[0009] The first cover structure is detachably connected with one end of the bearing chamber body, and the second cover structure is detachably connected with one end of the bearing seat.

[0010] Preferably, the first cover structure comprises a first cover plate and a plug-in ring, one end of the plug-in ring is fixedly connected with one end of the first cover plate, the other end of the plug-in ring is plugged into the connecting port, the plug-in ring is in sliding connection with the connecting port, and the first cover plate is detachably connected with the bearing chamber body through bolts.

[0011] Preferably, a first sealing ring is arranged at the connection between the plug-in ring and the connecting port, a first sealing groove is arranged on the outer side of the plug-in ring for mounting the first sealing ring, the first sealing ring is fixedly arranged in the first sealing groove, and the outer side of the first sealing ring is in sliding connection with the inner side wall of the connecting port.

[0012] Preferably, one end of the plug-in ring extends into the lubricating oil cavity, the end of the plug-in ring can form a positioning part with the mounting port on the bearing seat, the positioning part is used for positioning the outer ring of the bearing during bearing installation, and a plurality of lubricating oil through ports are arranged on the end of the plug-in ring in the lubricating oil cavity, the lubricating oil through ports penetrate the plug-in ring, and the lubricating oil through ports are used for connecting the mounting port and the lubricating oil cavity.

[0013] Preferably, the second cover structure comprises a second cover plate and a sealing ring body, one end of the sealing ring body is fixedly connected with one end of the second cover plate, the other end of the sealing ring body can be plugged into the cooling gas cavity, and the sealing ring body is in sliding connection with the bearing seat and the mounting cavity, and the second cover plate is detachably connected with the bearing seat through bolts.

[0014] Preferably, a second sealing groove is arranged at the end of the sealing ring body connected with the bearing seat, a second sealing ring is arranged in the second sealing groove, the second sealing ring is fixedly arranged in the second sealing groove, and the second sealing ring is in sliding connection with the bearing seat.

[0015] Preferably, a third sealing groove is arranged at the end of the sealing ring body connected with the mounting cavity, a third sealing ring is arranged in the third sealing groove, the third sealing ring is fixedly arranged in the third sealing groove, and the mounting cavity is in sliding connection with the inner side wall.

[0016] Preferably, first connecting pipes are fixedly arranged at the lubricating oil inlet and the lubricating oil outlet, second connecting pipes are arranged at one end of the first connecting pipes, the second connecting pipes are plugged into the first connecting pipes and are in threaded connection with the first connecting pipes, and the other ends of the second connecting pipes are connected with a lubricating oil source through external pipelines.

[0017] Preferably, first gas pipes are fixedly arranged at the cooling gas inlet and the cooling gas outlet, second gas pipes are arranged at one end of the first gas pipes, the second gas pipes are plugged into the first gas pipes and are in threaded connection with the first gas pipes, and the other ends of the second gas pipes are connected with a cooling gas source through external pipelines.

[0018] Preferably, the end of the first gas pipe is provided with a first sealing ring, the second gas pipe is provided with a second sealing ring matched with the first sealing ring, a sealing washer is arranged between the first sealing ring and the second sealing ring, one end of the sealing washer is fixedly connected with the first sealing ring, and the other end of the sealing washer can be in contact with the second sealing ring to form a seal.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The utility model discloses a lubricating oil cavity and cooling gas cavity are set up, realize the double -effect heat dissipation of bearing. When using, the heat generated in the operation of bearing not only can be taken away through lubricating oil, can also take away through cooling gas simultaneously, and then realize the double -effect heat dissipation of bearing, greatly improve the heat dissipation effect of bearing chamber. The heat dissipation effect of the bearing chamber of the multistage centrifugal pump is not good in use at present, and the problems of aggravating bearing wear, deteriorating lubricating performance and even bearing failure are solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a bearing chamber structure's section structure schematic diagram that the utility model embodiment is described;

[0022] Figure 2 It is a bearing chamber structure's partial section structure schematic diagram that the utility model embodiment is described;

[0023] Figure 3 It is the structure schematic diagram of first cover structure that the utility model embodiment is described;

[0024] Figure 4 It is the structure schematic diagram of second cover structure that the utility model embodiment is described;

[0025] Figure 5 It is the structure schematic diagram of bearing chamber structure that the utility model embodiment is described Figure 2 The local amplification structure schematic diagram of A place in;

[0026] Figure 6 It is the structure schematic diagram of bearing chamber structure that the utility model embodiment is described;

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 10-bearing chamber body, 100-mounting cavity, 101-connection port, 102-lubricating oil inlet, 103-lubricating oil outlet, 104-cooling gas inlet, 105-cooling gas outlet, 106-first connecting pipe, 107-second connecting pipe, 108-first gas pipe, 109-second gas pipe, 110-first sealing ring, 111-second sealing ring, 112-sealing washer, 113-window, 20-bearing seat, 200-mounting port, 30-lubricating oil cavity, 40-cooling gas cavity, 50-first cover structure, 500-first cover plate, 501-plug ring, 502-first sealing ring, 503-first sealing groove, 504-positioning portion, 505-lubricating oil passing port, 60-second cover structure, 600-second cover plate, 601-sealing ring body, 602-second sealing groove, 603-second sealing ring, 604-third sealing groove, 605-third sealing ring. DETAILED DESCRIPTION

[0029] The embodiments of the utility model will be described below in detail in combination with the drawings.

[0030] Embodiment:

[0031] As Figures 1 to 2 shown, in order to solve the above problems, the embodiment discloses a bearing chamber structure, comprising a bearing chamber body 10 and a bearing seat 20 for mounting a bearing, one end of the bearing chamber body 10 is provided with a mounting cavity 100, the other end is provided with a connection port 101 which is communicated with the mounting cavity 100, the bearing seat 20 is arranged in the mounting cavity 100 and is fixedly connected with the mounting cavity 100, the bearing seat 20 is provided with a mounting port 200 for mounting a bearing, and the bearing can be mounted in the mounting port 200.

[0032] The bearing seat 20 is provided with a lubricating oil cavity 30 between one end and the mounting cavity 100, the lubricating oil cavity 30 is located at one end of the mounting cavity 100 close to the connection port 101 and is communicated with the connection port 101, the bearing chamber body 10 is provided with a lubricating oil inlet 102 and a lubricating oil outlet 103 which are communicated with the lubricating oil cavity 30, the bearing seat 20 is provided with a cooling gas cavity 40 between the other end and the inner wall of the mounting cavity 100, and the bearing chamber body 10 is provided with a cooling gas inlet 104 and a cooling gas outlet 105 which are communicated with the cooling gas cavity 40.

[0033] The connection port 101 is provided with a first cover structure 50 for closing the connection port 101, the first cover structure 50 is detachably connected with one end of the bearing chamber body 10, and the mounting cavity 100 is provided with a second cover structure 60 for closing the cooling gas cavity 40, and the second cover structure 60 is detachably connected with one end of the bearing seat 20.

[0034] The utility model discloses a bearing chamber of multistage centrifugal pump, which belongs to the technical field of pump, and relates to a bearing chamber of multistage centrifugal pump, comprising a bearing chamber main body 10, a bearing 20 and a bearing cover 50, wherein the bearing 20 is arranged in the bearing chamber main body 10, and the bearing cover 50 is arranged on the bearing chamber main body 10 and covers the bearing 20, the bearing cover 50 comprises a lubricating oil cavity 30 and a cooling gas cavity 40, the lubricating oil cavity 30 is arranged on one side of the bearing cover 50, and the cooling gas cavity 40 is arranged on the other side of the bearing cover 50.

[0035] As shown in the figure, Figure 3 In order to facilitate the sealing connection of the connecting port 101, the first cover structure 50 comprises a first cover plate 500 and a plug-in ring 501, one end of the plug-in ring 501 is fixedly connected with one end of the first cover plate 500, the other end of the plug-in ring 501 is plugged into the connecting port 101, the plug-in ring 501 is in sliding connection with the connecting port 101, and the first cover plate 500 is detachably connected with the bearing chamber main body 10 through bolts.

[0036] The connecting position of the plug-in ring 501 and the connecting port 101 is provided with a first sealing ring 502, the outer side of the plug-in ring 501 is provided with a first sealing groove 503 for mounting the first sealing ring 502, the first sealing ring 502 is fixedly mounted in the first sealing groove 503, and the outer side of the first sealing ring 502 is in sliding connection with the inner side wall of the connecting port 101.

[0037] In use, the connecting port 101 and the first cover structure 50 are arranged, the first cover structure 50 is detachably connected with the bearing chamber main body 10 through bolts, the lubricating oil cavity 30 can be conveniently cleaned, and the bearing chamber can be conveniently maintained. Meanwhile, the first sealing ring 502 and the plug-in ring 501 are arranged, the sealing connection of the first cover structure 50 and the connecting port 101 can be conveniently achieved, the lubricating oil flowing out of the connecting port 101 is reduced, and the sealing performance of the connecting port 101 is improved.

[0038] As shown in the figure, Figure 1 In order to facilitate the installation of the bearing, the plug-in ring 501 extends into the lubricating oil cavity 30, the end of the plug-in ring 501 can form a positioning part 504 with the mounting port 200 on the bearing seat 20, the positioning part 504 is used for positioning the outer ring of the bearing during installation of the bearing, a plurality of lubricating oil passing ports 505 are arranged on the end of the plug-in ring 501 in the lubricating oil cavity 30, the lubricating oil passing ports 505 penetrate through the plug-in ring 501, and the lubricating oil passing ports 505 are used for connecting the mounting port 200 and the lubricating oil cavity 30.

[0039] In use, the end of the plug-in ring 501 can form a positioning part 504 with the mounting port 200 on the bearing seat 20, so that when the bearing is installed, the outer ring of the bearing can be quickly positioned, thereby facilitating the installation of the bearing. Meanwhile, the setting of the several lubricating oil passing ports 505 can facilitate the contact of the lubricating oil in the lubricating oil cavity 30 with the bearing, thereby taking away the heat generated by the bearing during operation.

[0040] It should be noted that the bearing is in communication with the lubricating oil cavity 30 at one end and needs to be sealed between the other end and the bearing seat 20 to avoid the flow of lubricating oil from the bearing to the other side of the bearing seat 20. The structure here can use the prior art, and the present utility model does not involve improvement and protection of this structure, so it is not described in detail here.

[0041] As shown in Figure 4 In order to facilitate the sealing of the cooling gas cavity 40, the second cover structure 60 includes a second cover plate 600 and a sealing ring body 601, one end of the sealing ring body 601 is fixedly connected with one end of the second cover plate 600, the other end of the sealing ring body 601 can be plugged into the cooling gas cavity 40 and is in sliding connection with the bearing seat 20 and the mounting cavity 100, and the second cover plate 600 is in detachable connection with the bearing seat 20 through bolts.

[0042] The end of the sealing ring body 601 connected with the bearing seat 20 is provided with a second sealing groove 602, and the second sealing groove 602 is provided with a second sealing ring 603, which is fixedly installed in the second sealing groove 602 and is in sliding connection with the bearing seat 20.

[0043] The end of the sealing ring body 601 connected with the mounting cavity 100 is provided with a third sealing groove 604, and the third sealing groove 604 is provided with a third sealing ring 605, which is fixedly installed in the third sealing groove 604 and is in sliding connection with the inner side wall of the mounting cavity 100.

[0044] In use, the second sealing ring 603 and the third sealing ring 605 can realize the sealing of the cooling gas cavity 40, reduce the outflow of gas in the cooling gas cavity 40 from the connection between the second cover structure 60 and the bearing seat 20, and improve the sealing performance of the cooling gas cavity 40.

[0045] As shown in Figure 5As shown, in order to facilitate the lubricating oil into the bearing chamber body 10, the lubricating oil in the bearing chamber body 10 outflow, and facilitate the bearing chamber maintenance, the embodiment is based on the above embodiment on the basis of the change, different from the above embodiment, the lubricating oil inlet 102 and the lubricating oil outlet 103 are fixedly provided with the first connecting pipe 106, one end of the first connecting pipe 106 is provided with the second connecting pipe 107, one end of the second connecting pipe 107 can be inserted into the first connecting pipe 106, and the first connecting pipe 106 is threadedly connected, the other end of the second connecting pipe 107 can be connected with the lubricating oil source through the external pipeline.

[0046] Wherein, the cooling gas inlet 104 and the cooling gas outlet 105 are fixedly provided with the first gas pipe 108, one end of the first gas pipe 108 is provided with the second gas pipe 109, one end of the second gas pipe 109 can be inserted into the first gas pipe 108, and the first gas pipe 108 is threadedly connected, the other end of the second gas pipe 109 can be connected with the cooling gas source through the external pipeline.

[0047] In use, the first connecting pipe 106 and the second connecting pipe 107 are threadedly connected, the first gas pipe 108 and the second gas pipe 109 are threadedly connected, which can facilitate the bearing chamber body 10 installation and disassembly. When the bearing chamber body 10 needs to be maintained, only the second connecting pipe 107 and the second gas pipe 109 can be disassembled.

[0048] Wherein, it should be noted that the second connecting pipe 107 is connected with the lubricating oil source through the external pipeline, and the external pipeline and the second connecting pipe 107 can be fixedly connected, thereby improving the sealing between the external pipeline and the second connecting pipe 107. The lubricating oil source can adopt the lubricating oil storage device in the prior art. Similarly, the second gas pipe 109 and the external pipeline can be fixedly connected, thereby improving the sealing between the second gas pipe 109 and the external pipeline. The cooling gas source can adopt the cooling gas storage device or the air supply device in the prior art.

[0049] In order to enhance the sealing between the first gas pipe 108 and the second gas pipe 109, the embodiment is based on the above embodiment on the basis of the change, different from the above embodiment, the end of the first gas pipe 108 is provided with the first sealing ring 110, the second gas pipe 109 is provided with the second sealing ring 111 matched with the first sealing ring 110, the first sealing ring 110 and the second sealing ring 111 are provided with the sealing washer 112, one end of the sealing washer 112 is fixedly connected with the first sealing ring 110, and the other end can be in contact with the second sealing ring 111 to form a seal.

[0050] The sealing gasket 112 is arranged, so that the sealing performance of the connection between the first gas pipe 108 and the second gas pipe 109 is effectively improved, and the outflow of cooling gas from the connection between the first gas pipe 108 and the second gas pipe 109 is reduced.

[0051] It should be noted that, when the first gas pipe 108 and the second gas pipe 109 are connected, and the first connecting pipe 106 and the second connecting pipe 107 are connected, sealing glue is needed to be filled, so as to further improve the sealing performance of the connection.

[0052] As shown in Figure 6 It is further preferred that the bearing chamber body 10 is provided with a window 113 on one side, and the window 113 is communicated with the mounting cavity 100. The window 113 is arranged, so that the weight of the bearing chamber body 10 is effectively reduced.

[0053] Working principle of the utility model:

[0054] The utility model discloses a lubricating oil cavity 30 and cooling gas cavity 40 are set up, realize the double -effect heat dissipation of bearing. When using, the heat generated in the operation of bearing can not only be taken away through lubricating oil, but also can be taken away through cooling gas, and then realize the double -effect heat dissipation of bearing, greatly improve the heat dissipation effect of bearing chamber.

[0055] The above-mentioned embodiment only expresses the specific implementation mode of the utility model, and the description is more specific and detailed, but can not be understood as the limitation of the patent range of the utility model. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the concept of the utility model, a plurality of deformation and improvement can be made, and these all belong to the protection scope of the utility model.

Claims

1. A bearing chamber structure characterized by, The bearing chamber body (10) is provided with a mounting cavity (100) at one end and a connecting port (101) in communication with the mounting cavity (100) at the other end, the bearing seat (20) is arranged in the mounting cavity (100) and fixedly connected with the mounting cavity (100), and the bearing seat (20) is provided with a mounting port (200) for mounting the bearing, and the bearing can be mounted in the mounting port (200); The bearing seat (20) is provided with a lubricating oil cavity (30) between one end and the mounting cavity (100), the lubricating oil cavity (30) is located at one end of the mounting cavity (100) close to the connecting port (101) and in communication with the connecting port (101), the bearing chamber body (10) is provided with a lubricating oil inlet (102) and a lubricating oil outlet (103) in communication with the lubricating oil cavity (30), and the bearing seat (20) is provided with a cooling gas cavity (40) between the other end and the inner side wall of the mounting cavity (100), and the bearing chamber body (10) is provided with a cooling gas inlet (104) and a cooling gas outlet (105) in communication with the cooling gas cavity (40); The connecting port (101) is provided with a first cover structure (50) for closing the connecting port (101), the first cover structure (50) is detachably connected with one end of the bearing chamber body (10), and the mounting cavity (100) is provided with a second cover structure (60) for closing the cooling gas cavity (40), the second cover structure (60) is detachably connected with one end of the bearing seat (20).

2. A bearing chamber structure according to claim 1, wherein The first cover structure (50) comprises a first cover plate (500) and a plug-in ring (501), one end of the plug-in ring (501) is fixedly connected with one end of the first cover plate (500), the other end of the plug-in ring (501) is plugged into the connecting port (101), the plug-in ring (501) is slidably connected with the connecting port (101), and the first cover plate (500) is detachably connected with the bearing chamber body (10) through bolts.

3. A bearing chamber structure according to claim 2, wherein The connecting part of the plug-in ring (501) and the connecting port (101) is provided with a first sealing ring (502), the outer side of the plug-in ring (501) is provided with a first sealing groove (503) for mounting the first sealing ring (502), the first sealing ring (502) is fixedly mounted in the first sealing groove (503), and the outer side of the first sealing ring (502) is slidably connected with the inner side wall of the connecting port (101).

4. A bearing chamber structure according to claim 3, wherein One end of the plug-in ring (501) extends into the lubricating oil cavity (30), and the end of the plug-in ring (501) can form a positioning part (504) with the mounting port (200) on the bearing seat (20), for positioning the outer ring of the bearing during mounting, and a plurality of lubricating oil through ports (505) are arranged on one end of the plug-in ring (501) in the lubricating oil cavity (30), the lubricating oil through ports (505) penetrate the plug-in ring (501) and are used for communicating the mounting port (200) with the lubricating oil cavity (30).

5. A bearing chamber structure according to claim 4, wherein The second cover structure (60) comprises a second cover plate (600) and a sealing ring body (601), one end of the sealing ring body (601) is fixedly connected with one end of the second cover plate (600), the other end of the sealing ring body (601) is insertable into the cooling gas cavity (40) and is in sliding connection with the bearing seat (20) and the mounting cavity (100), and the second cover plate (600) is detachably connected with the bearing seat (20) through bolts.

6. A bearing chamber structure according to claim 5, wherein The end of the sealing ring body (601) connected with the bearing seat (20) is provided with a second sealing groove (602), and the second sealing groove (602) is provided with a second sealing ring (603), the second sealing ring (603) is fixedly installed in the second sealing groove (602) and is in sliding connection with the bearing seat (20).

7. A bearing chamber structure according to claim 6, wherein The end of the sealing ring body (601) connected with the mounting cavity (100) is provided with a third sealing groove (604), and the third sealing groove (604) is provided with a third sealing ring (605), the third sealing ring (605) is fixedly arranged in the third sealing groove (604) and is in sliding connection with the inner side wall of the mounting cavity (100).

8. A bearing chamber structure according to claim 1 or 7, wherein The lubricating oil inlet (102) and the lubricating oil outlet (103) are fixedly provided with first connecting pipes (106), one end of the first connecting pipe (106) is provided with a second connecting pipe (107), one end of the second connecting pipe (107) is insertable into the first connecting pipe (106) and is in threaded connection with the first connecting pipe (106), and the other end of the second connecting pipe (107) is connectable with a lubricating oil source through an external pipeline.

9. A bearing chamber structure according to claim 8, wherein The cooling gas inlet (104) and the cooling gas outlet (105) are fixedly provided with first gas pipes (108), one end of the first gas pipe (108) is provided with a second gas pipe (109), one end of the second gas pipe (109) is insertable into the first gas pipe (108) and is in threaded connection with the first gas pipe (108), and the other end of the second gas pipe (109) is connectable with a cooling gas source through an external pipeline.

10. A bearing chamber structure according to claim 9, wherein The end of the first gas pipe (108) is provided with a first sealing ring (110), the second gas pipe (109) is provided with a second sealing ring (111) matched with the first sealing ring (110), and the first sealing ring (110) and the second sealing ring (111) are in contact A sealing washer (112) is arranged between the first sealing ring (110) and the second sealing ring (111), and the other end of the sealing washer (112) is in contact with the second sealing ring (111) to form a seal.

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