Split type oil lubrication bearing box structure

Abstract

The utility model discloses a split type oil lubrication bearing box structure, which belongs to the field of oil lubrication bearing boxes, and comprises a left cavity and a right cavity, the left cavity and the right cavity are both provided with through holes for installing a pump shaft, and flange plates are welded on the opposite surfaces of the left cavity and the right cavity. A bracket matched with a bearing on a pump shaft is welded to one flange plate, and the two flange plates are attached to each other in a sealed mode and fixed through bolts. A heat exchanger is further installed in the right cavity. By optimizing the lubricating cooling and structural design, the temperature rise of the bearing can be obviously reduced, the maintenance is convenient, and the production cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of oil-lubricated bearing housings, and more specifically, relates to a split-type oil-lubricated bearing housing structure. Background Technology

[0002] Currently, multistage pump bearings generally use grease lubrication. However, under high-speed (e.g., >3000 rpm) conditions in vane-type screw mixed-transfer pumps, grease lubrication is prone to failure due to frictional temperature rise, leading to bearing wear or even seizure. To solve this problem, vane-type screw mixed-transfer pumps mostly use integral cast bearing housings. However, this method still has the following drawbacks: 1. Low heat dissipation efficiency: The uneven wall thickness of the cast structure results in poor heat conduction between the oil cavity and the bearing mounting area; 2. Inconvenient maintenance: Disassembling the bearing in an integral housing requires complete disassembly, which is time-consuming and affects sealing; 3. High cost: The casting process is complex, the production cycle is long, and it is difficult to adapt to customized needs; 4. Lack of monitoring: There is a lack of integrated bearing temperature and vibration monitoring interfaces.

[0003] To address the lubrication challenges of bearings in high-speed mixed-transfer pumps, there is an urgent need for a split-type oil-lubricated bearing housing structure that can significantly reduce bearing temperature rise and facilitate maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a split-type oil-lubricated bearing housing structure. By optimizing the lubrication and cooling and structural design, it can not only significantly reduce the bearing temperature rise, but also facilitate maintenance and reduce production costs.

[0005] To achieve the purpose of this utility model, the technical solution adopted is as follows: a split-type oil-lubricated bearing housing structure, including a left cavity and a right cavity, both the left cavity and the right cavity are provided with through holes for pump shaft installation, and flanges are welded to the opposite surfaces of the left cavity and the right cavity, one of the flanges is welded with a bracket that mates with the bearing on the pump shaft, the two flanges are sealed together and fixed by bolts; a heat exchanger is also installed inside the right cavity.

[0006] Furthermore, the bracket is cylindrical, with a positioning step on the inner wall of one end that mates with the bearing on the pump shaft, and a pressure ring that can press against the bearing on the pump shaft is installed at the extended end of the bracket.

[0007] Furthermore, a cover plate is also installed at the other end of the bracket, and the through hole for the pump shaft to pass through on the left cavity is located on the cover plate.

[0008] Furthermore, the bracket is also provided with radially penetrating oil holes.

[0009] Furthermore, an observation window is provided on the left cavity.

[0010] Furthermore, the bracket is also provided with a temperature measuring hole for installing a temperature sensor, and the temperature measuring hole corresponds to the bearing on the pump shaft.

[0011] Furthermore, the left or right cavity is provided with mounting holes for installing vibration sensors.

[0012] Furthermore, an oil inlet and an oil outlet are installed on the right cavity.

[0013] Furthermore, a sealing ring is installed between the mating surfaces of the two flanges.

[0014] Furthermore, both the left and right cavities are formed by welding.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model, by installing a heat exchanger in the right cavity, cools the lubricating oil in the right and left cavities, which can effectively improve the fluidity and heat dissipation efficiency of the oil. Through actual measurement, it is found that by adopting the bearing box structure provided by this utility model, the operating temperature of the bearing can be reduced by more than 40%, avoiding grease carbonization and bearing failure caused by high temperature.

[0017] 2. This utility model uses a right cavity and a left cavity to form the bearing housing, making the bearing housing a split design. This allows the oil chamber to be cleaned quickly without disassembling the entire bearing housing when cleaning is needed, reducing maintenance time by more than 30% and reducing downtime losses.

[0018] 3. The left and right cavities in this utility model are formed by welding steel plates, which eliminates mold costs compared to casting, increases material utilization by 20% to 30%, reduces production costs by more than 30%, shortens delivery time by 15 to 20 days, and meets customized needs. In addition, the bearing housing provided by this utility model can reduce weight by 15% to 20% compared to existing cast gearboxes, thus reducing energy consumption. At the same time, the design of the left and right cavities in this utility model can reduce the amount of lubricating oil used, and with the use of recyclable steel plate materials, it conforms to the concept of green manufacturing.

[0019] 4. By setting a temperature measuring hole and a mounting hole, the bearing housing can be equipped with a temperature sensor installed in the temperature measuring hole to monitor the bearing temperature in real time, and a vibration sensor installed in the mounting hole to monitor the vibration of the bearing housing in real time. This allows for early warning of abnormal temperature rise and mechanical vibration, avoids sudden failures, and extends the service life of the equipment. Attached Figure Description

[0020] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0021] Figure 1 This is a structural diagram of a split-type oil-lubricated bearing housing.

[0022] The attached diagram shows the markings and corresponding component names:

[0023] 1. Left cavity, 2. Right cavity, 3. Sealing ring, 4. Heat exchanger, 5. Bracket, 6. Pressure ring, 7. Cover plate, 8. Bearing, 9. Pump shaft, 10. Vibration sensor;

[0024] 101. Mounting hole; 102. Flange;

[0025] 201, oil inlet; 202, oil outlet;

[0026] 501, Temperature measuring hole; 502, Positioning step; 503, Oil hole. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0028] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, this utility model provides a split-type oil-lubricated bearing housing structure, including a left cavity 1 and a right cavity 2. Both the left cavity 1 and the right cavity 2 have through holes. The through holes on the left cavity 1 and the right cavity 2 are coaxially arranged. During installation, the pump shaft 9 passes through both the through holes on the left cavity 1 and the right cavity 2. After installation, the outer end of the pump shaft 9 is in a rotating sealing fit with the right cavity 2, preventing lubricating oil leakage through the gap between the pump shaft 9 and the right cavity 2. Flanges 102 are provided on the opposite surfaces of the left cavity 1 and the right cavity 2. The flanges 102 are fixed to the left cavity 1 and the right cavity 2 by welding. When the left cavity 1 and the right cavity 2 need to be closed together to form a bearing housing 8, the flanges 102 on the left cavity 1 and the flanges 102 on the right cavity 2 are fitted together and fixed with bolts.

[0030] To support the rotation of the pump shaft 9, a bracket 5 is welded onto the left cavity 1. The inner wall of the bracket 5 fixes the outer ring of the bearing 8 on the pump shaft 9. The bracket 5 fixes the outer ring of the bearing 8, and the right cavity 2 provides a rotational sealing fit for the pump shaft 9, thereby achieving rotational support for the pump shaft 9 and ensuring the stability of the pump shaft 9 during rotation.

[0031] A heat exchanger 4 is also installed in the right cavity 2. The heat exchanger 4 cools down the lubricating oil in the bearing 8 box, so that while lubricating the shaft, the lubricating oil can carry away the heat generated by the friction between the shaft and the bearing 8, thus preventing the lubricating oil from failing due to the friction heating of the shaft and the bearing 8 during rotation, and ensuring the lubrication effect of the shaft.

[0032] In this utility model, the heat exchanger 4 is a heat exchange tube arranged in a spiral or serpentine manner inside the right cavity 2. The inlet end and outlet end of the heat exchange tube extend outward through the right cavity 2 and are connected to the external pipeline through the pipeline system.

[0033] In this invention, to better fix the outer end of the bearing 8, the bracket 5 is cylindrical. The central axis of the bracket 5, the center of the through hole in the left cavity 1, and the center of the through hole in the right cavity 2 are on the same straight line. The outer ring of the bearing 8 is fixed on the inner circular surface of the bracket 5. To prevent the bearing 8 from axially displacing on the pump shaft 9, a positioning step 502 is provided on the inner wall of the bracket 5, making the inner wall of the bracket 5 stepped. When the bearing 8 on the pump shaft 9 is installed, the outer ring of the bearing 8 is inside the bracket 5 at the end with the larger inner diameter, and one side of the outer ring of the bearing 8 is pressed against the positioning step 502. At the same time, in order to press the other side of the outer ring of the bearing 8 against the bracket, a pressure ring 6 is installed at the end of the bracket 5 away from the left cavity 1 to press the outer ring of the bearing 8, and the pressure ring 6 is fixed to the bracket 5 by bolts.

[0034] In this invention, when there are two bearings 8 on the pump shaft 9, the two bearings 8 are pressed together on the pump shaft 9. At this time, the outer side of the outer ring of one bearing 8 abuts against the positioning step 502, and the outer side of the outer ring of the other bearing 8 abuts against the pressure ring 6. It should be noted here that the outer side of the outer ring of the bearing 8 refers to the side of the outer ring of the bearing 8 that is away from the outer ring of the other bearing 8. That is, when the two bearings 8 are pressed together, the side of the outer rings of the two bearings 8 that is pressed together is the inner side of the outer ring of the bearing 8, and the other side of the outer rings of the two bearings 8 is the outer side of the outer ring of the bearing 8.

[0035] In this utility model, a cover plate 7 is also installed at the end of the bracket 5 away from the bearing 8. The cover plate 7 is fixed to the bracket 5 with bolts. That is, the cover plate 7 and the pressure ring 6 are located at the two ends of the bracket 5 respectively. At this time, the through hole for the pump shaft 9 to pass through on the left cavity 1 is located on the cover plate 7.

[0036] In this utility model, after the bearing 8 on the pump shaft 9 is installed, the bearing 8 and the bracket 5 work together to divide the bearing housing into two independent chambers. In order to ensure the lubrication and cooling effect of the lubricating oil on the bearing 8, the bracket 5 is also provided with a radially penetrating oil hole 503. The oil hole 503 can connect the space inside the bracket 5 with the space outside the bracket 5. At the same time, in order to ensure the connection between the two chambers inside the bearing housing, the position of the oil hole 503 on the bracket 5 is offset from that of the bearing 8.

[0037] In this utility model, in order to facilitate observation of the lubricating oil in the bearing housing 8, an observation window is also provided on the left cavity 1. The observation window is installed on the left cavity 1 in an embedded manner, and the minimum oil level line and the maximum oil level line are marked on the observation window or the left cavity 1.

[0038] In this invention, to facilitate real-time temperature monitoring of the bearing 8 during use, a temperature sensing hole 501 is installed on the bracket 5. The position of the temperature sensing hole 501 corresponds to the position of the bearing 8, and the temperature sensing hole 501 is used to install a temperature sensor to detect the temperature of the bearing 8. By monitoring the temperature of the bearing 8 in real time through the temperature sensor, the operator can promptly detect any abnormal temperature rise in the bearing 8, thus preventing sudden malfunctions. Of course, the operator can decide whether to install a temperature sensor in the temperature sensing hole 501 according to usage requirements. When a temperature sensor is not installed in the temperature sensing hole 501, it will not affect the bearing 8 or the lubrication effect of the lubricating oil on the bearing 8.

[0039] In this invention, to facilitate monitoring of abnormal vibrations in the bearing housing 8, a mounting hole 101 for installing a vibration sensor 10 is provided on the left cavity 1. The mounting hole 101 is a countersunk hole and does not penetrate the interior of the left cavity 1. The vibration sensor 10 installed in the mounting hole 101 can detect the mechanical vibration of the bearing housing 8 in real time, allowing staff to promptly detect abnormal vibrations and prevent sudden malfunctions. Of course, staff can decide whether to install the vibration sensor 10 in the mounting hole 101 based on usage requirements. When the vibration sensor 10 is not installed in the mounting hole 101, it will not affect the sealing performance of the bearing housing 8.

[0040] In this utility model, in order to facilitate the replenishment of lubricating oil in the bearing housing 8, an oil inlet 201 communicating with its interior is also installed on the right cavity 2; in order to facilitate the replacement of lubricating oil in the bearing housing 8, an oil outlet 202 communicating with its interior is also installed on the right cavity 2.

[0041] In this utility model, in order to ensure the sealing of the bearing housing 8, a sealing ring 3 is installed between the mating surfaces of the two flanges 102. The sealing ring 3 is an O-ring. When the two flanges 102 are tightly fitted, the sealing ring 3 is gradually flattened and sealed to the two flanges 102 respectively, so that the gap between the two flanges 102 is sealed and the lubricating oil in the bearing housing 8 is prevented from leaking from the gap between the two flanges 102.

[0042] In this invention, both the left cavity 1 and the right cavity 2 are formed by laser cutting and welding of steel plates. The welds are subjected to stress-relief annealing treatment, which replaces the traditional casting process and reduces the processing cycle and material costs.

[0043] In this invention, the bracket 5 can also be welded and fixed to the right cavity 2. In this case, only the pressure ring 6 needs to be fixed at the end of the bracket 5 near the left cavity 1, and the end of the bracket 5 near the right cavity 2 is open, meaning that the cover plate 7 does not need to be installed on the bracket 5. At the same time, the mounting hole 101 can also be opened on the right cavity 2, the observation window can be set on the left cavity 1, and the heat exchanger 4 can also be installed in the left cavity 1. That is, in this invention, the welding and fixing positions of the observation window, the heat exchanger 4, and the bracket 5 can all be adjusted according to the actual situation.

[0044] In use, the pump shaft 9 is first inserted through the through hole on the cover plate 7 and the bracket 5. Then, the bearing 8 is installed on the pump shaft 9, and the outer ring of the bearing 8 is clamped at the end of the bracket 5 with the smaller inner diameter. The pressure ring 6 is fixed on the bracket 5 with bolts, so that the two sides of the outer ring of the bearing 8 are respectively abutted against the positioning step 502 and the pressure ring 6. Next, the temperature sensor is installed in the temperature measuring hole 501, the heat exchanger 4 is installed in the right cavity 2, and after the outer end of the pump shaft 9 is installed on the left cavity 1, the flange 102 on the left cavity 1 and the flange 102 on the right cavity 2 are fixed with bolts. Finally, the vibration sensor 10 is installed in the mounting hole 101.

[0045] Lubricating oil is injected into the bearing housing 8 through the oil inlet 503. During the injection process, the oil level in the bearing housing 8 is observed through the observation window. Then, the oil inlet 201 is closed, and the heat exchanger 4 is started when the pump shaft 9 rotates. The heat exchanger 4 cools the lubricating oil in the bearing housing 8, so that the lubricating oil cools the bearing 8 while lubricating it.

[0046] When the lubricating oil in bearing housing 8 needs to be replaced, open the oil inlet 201 and the oil outlet 202. The lubricating oil in bearing housing 8 will be discharged through the oil outlet 202. After all the lubricating oil in bearing housing 8 has been discharged, seal the oil outlet 202 and inject new lubricating oil into bearing housing 8 through the oil inlet.

[0047] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A split-type oil-lubricated bearing housing structure, characterized in that, It includes a left cavity (1) and a right cavity (2). Both the left cavity (1) and the right cavity (2) are provided with through holes for the installation of the pump shaft (9). The opposite surfaces of the left cavity (1) and the right cavity (2) are welded with flanges (102). One of the flanges (102) is welded with a bracket (5) that mates with the bearing (8) on the pump shaft (9). The two flanges (102) are sealed together and fixed with bolts. A heat exchanger (4) is also installed inside the right cavity (2).

2. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, The bracket (5) is cylindrical. The inner wall of one end of the bracket (5) is provided with a positioning step (502) that cooperates with the bearing (8) on the pump shaft (9). The extended end of the bracket (5) is also equipped with a pressure ring (6) that can press the bearing (8) on the pump shaft (9).

3. The split-type oil-lubricated bearing housing structure according to claim 1 or 2, characterized in that, The other end of the bracket (5) is also equipped with a cover plate (7), and the through hole on the left cavity (1) through which the pump shaft (9) passes is located on the cover plate (7).

4. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, The bracket (5) is also provided with a radially penetrating oil hole (503).

5. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, An observation window is provided on the left cavity (1).

6. The split-type oil-lubricated bearing housing structure according to claim 1 or 2, characterized in that, The bracket (5) is also provided with a temperature measuring hole (501) for installing a temperature sensor, and the temperature measuring hole (501) corresponds to the bearing (8) on the pump shaft (9).

7. The split-type oil-lubricated bearing housing structure according to claim 1 or 2, characterized in that, The left cavity (1) or the right cavity (2) is also provided with mounting holes (101) for mounting vibration sensors (10).

8. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, The right cavity (2) is equipped with an oil inlet (201) and an oil outlet (202).

9. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, A sealing ring (3) is also installed between the mating surfaces of the two flanges.

10. The split-type oil-lubricated bearing housing structure according to claim 1, characterized in that, Both the left cavity (1) and the right cavity (2) are formed by welding.

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