Bearing lubricating oil chamber structure for double suction pump

Abstract

The invention discloses a bearing lubricating oil chamber structure for a double suction pump, relates to the field of pumps, and abandons the situation that a traditional exhaust valve releases oil mist pressure, blades rotate to form a right high-pressure area when a customized bearing rotates, the bottom end of the customized bearing is locally immersed in oil, oil is uniformly carried during rotation and heat is increased, and air in a lubricating chamber is injected into an oil can through the pressure difference of the two sides of the blades; compared with a traditional mode, the lubricating device has the advantages that the uniformity is higher, repeated friction and atomization of the oil can be avoided, the oil enters the oil can along with airflow along with continuous adding of the oil in the lubricating chamber and rising of the liquid level, and the lubricating effect is better. And the oil is cooled and circulated in the return pipe after being filtered by the kettle cover, so that the oil can be continuously and circularly filtered, the reliability of the oil is ensured, the cooled oil can lubricate the bearing and take away heat, long-time high-speed use is met, the oil loss is small, the operation environment of the bearing is stable, and the overall maintenance period is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the field of pump machines, and particularly to a bearing lubricating oil chamber structure for a double-suction pump. Background Art

[0002] A double-suction pump is composed of components such as a pump body, an impeller, bearings, a casing, and seals. The internal space of the pump body is divided into two symmetric suction chambers and an outlet chamber. The impeller consists of blades and a disc, rotates driven by a motor, and the bearings support the rotation of the impeller. The double-suction pump is equivalent to two single-suction impellers with the same diameter working simultaneously. Under the same impeller outer diameter, the flow rate can be doubled. And due to the symmetric structure of the double-suction pump impeller, there is basically no axial force, or only a small amount of axial force is borne by the bearings at the coaxial end. The axial load of the bearings is relatively low, and it has high stability. However, based on its stable characteristics, the current double-suction pumps are often applied to be driven by motors with relatively large power, and rotate at high speed for liquid pumping. Heat accumulation occurs inside the bearings during high-speed rotation. The internal oil not only needs to lubricate but also needs to play the role of bearing heat dissipation. In the traditional structure, an exhaust valve hole is designed to remove the oil mist pressure in the bearing cavity, which also leads to accelerated oil loss and poor heat control effect. For long-term high-speed operation, the continuous accumulation of temperature affects the service life of the bearings, and the service life of the oil is reduced. The overall maintenance cycle is often short. If the oil is not replenished in time, it is extremely easy to be damaged. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of pump machines.

[0004] To achieve the above purpose, the present invention adopts the following technical scheme: A bearing lubricating oil chamber structure for a double-suction pump, including a mounting seat fixed to the double-suction pump and a lubricating chamber installed therein, and further including a rotating body rotatably penetrating through the lubricating chamber. The lubricating chamber includes an oil sump and an end cover sealingly cooperating with one side thereof. A circulation component is communicated with the oil sump, and an oil leveling groove for uniformly dispersing the oil after the injection of the oil by the circulation component is also opened therein. The circulation component includes an oil pot for measuring the oil, and a flow valve for controlling the oil circulation flow rate is arranged at the bottom end of the oil pot. The rotating body includes a rotating shaft and a shrink disc fixed thereon. A customized bearing and a number of blades are arranged on the shrink disc. The customized bearing includes a bearing outer ring. The bearing outer ring includes a ring body, a lubricating groove opened on its inner wall, and a number of shunt holes opened on the ring body and communicated with the lubricating groove.

[0005] As a further description of the above technical scheme: The mounting seat includes a pump arm integrally fixed to the double-suction pump. A clamp is fixed to the upper surface of the pump arm by screws, and the end cover is fixed by cooperating with the clamp.

[0006] As a further description of the above technical solution: The end cover includes a sealing body, and a clamping edge for cooperating with the clamping tool and fitting into the inner wall of the pump arm is provided on the surface of the sealing body. A left oil seal for fitting with the surface of the rotating body is provided on the inner wall of the end cover.

[0007] As a further description of the above technical solution: The oil sump includes a sump body, and an oil return nozzle and an oil outlet nozzle are communicated with the surface of the sump body. A right oil seal for fitting with the surface of the rotating shaft is provided on the right side of the sump body.

[0008] As a further description of the above technical solution: A water blocking ring is sleeved on the surface of the rotating shaft, and the water blocking ring slides while fitting on the inner wall of the left oil seal.

[0009] As a further description of the above technical solution: The customized bearing further includes a bearing inner ring and a plurality of bearing rollers provided between the bearing inner ring and the bearing outer ring.

[0010] As a further description of the above technical solution: The rotating shaft includes a shaft body and a card slot opened thereon. A snap ring for cooperating with the card slot to limit it is provided on one side of the expansion sleeve.

[0011] As a further description of the above technical solution: The circulation assembly further includes a kettle lid threadedly fitted on the top of the oil kettle and communicated with the oil outlet nozzle. A filter element for filtering oil is fitted on the inner wall of the kettle lid. A pressing member for filling filter cotton and pressing the filter element is threadedly fitted on the inner wall of the kettle lid. The other end of the flow valve is communicated with a return pipe communicated with the oil return nozzle.

[0012] As a further description of the above technical solution: The right side of the inner wall of the sump body forms a conical inclined surface to form a pressurizing cavity, and a plurality of blades are located in the pressurizing cavity.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: This solution adopts a relative sealing structure and does not set a traditional exhaust valve to release the oil mist pressure. During operation, as the customized bearing rotates, its bottom end is partially immersed in the oil. During rotation, the oil is evenly carried and rotated. At the same time, as the heat increases, the blades form a high-pressure area on the right side during rotation. The blades do not contact the oil deposited at the bottom, so that a pressure difference is formed on the left and right sides of the blades, keeping the air in the lubrication chamber injected into the oil kettle. The air pressure in the oil kettle increases, and the oil at the bottom of the oil kettle enters the oil equalizing groove through the return pipe and the oil return nozzle, and is evenly introduced into the lubrication groove under the diversion action of the three diversion holes in the oil equalizing groove, so as to realize the lubrication operation of the customized bearing during high-speed operation. Compared with the traditional lubrication method, the uniformity is higher, and the continuously replaced oil inside can effectively avoid the oil from being repeatedly rubbed and heated to stir and atomize; Moreover, oil is continuously added to the lubrication chamber, increasing the liquid level of the oil inside. Different from the above-mentioned air entering the oil pot, after the oil in the lubrication chamber increases, the oil also starts to enter the oil pot along with the air flow and is filtered when passing through the pot lid. After filtration, it slowly cools during the process of passing through the return pipe and circulates. This can achieve continuous circulation and filtration of the oil, ensure the reliability of the oil, and keep the circulated oil cool down to lubricate the customized bearing and carry away the heat inside it, meeting the long-term continuous use under high-speed conditions. This method has little oil loss, the bearing operating environment is stable and reliable, and the overall maintenance cycle is greatly extended.

[0014] Regarding the above innovative content, the further advantages of this solution are: In this solution, a conical inclined plane is formed in the pressurized cavity of the bin body, which can keep the liquid level of the oil retained inside at a constant height all the time. The excess oil is directly discharged into the oil pot through the oil outlet nozzle for storage, avoiding lubrication problems caused by too much or too little oil volume; By setting a flow valve, the speed of the oil circulation can be controlled, and the maximum flow rate of the oil can be limited according to needs. The power of the double-suction pump increases, the blade speed increases, the pressure in the pressurized cavity continues to rise, and the pressure in the oil pot continues to increase. The flow valve can prevent too much oil from entering the customized bearing and prevent the occurrence of oil churning phenomenon, which may cause the bearing temperature to rise; After this solution is used and left standing for a period of time, based on the fact that the amount of oil that can be stored in the bin body is constant, the excess oil will gradually drain into the oil pot. At this time, observing the oil level in the oil pot can understand the oil loss amount, which is convenient for regularly replenishing the oil according to needs; A small amount of oil mist generated during the high-speed operation of the customized bearing in this solution can be recycled during cooling, avoiding waste and environmental impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the present invention; Figure 2 is a three-dimensional schematic diagram of another perspective of the present invention; Figure 3 is a front cross-sectional schematic diagram of the present invention; Figure 4 is a three-dimensional sectional schematic diagram of the present invention; Figure 5 is a three-dimensional sectional schematic diagram of the lubrication chamber of the present invention; Figure 6 is a front cross-sectional schematic diagram of the lubrication chamber of the present invention; Figure 7 is an exploded schematic diagram of the customized bearing of the present invention; Figure 8 is an exploded schematic diagram of the cross-section of the rotating body and the lubrication chamber of the present invention.

[0016] Legend Explanation: 10. Mounting base; 11. Pump arm; 12. Clamp; 20. Lubrication chamber; 21. End cover; 211. Sealing body; 212. Clamping edge; 213. Left oil seal; 22. Oil sump; 221. Sump body; 222. Right oil seal; 223. Oil return nozzle; 224. Oil outlet nozzle; 225. Oil distribution groove; 30. Rotating body; 31. Rotating shaft; 311. Shaft body; 312. Card slot; 32. Customized bearing; 321. Bearing inner ring; 322. Bearing outer ring; 01. Ring body; 02. Lubrication groove; 03. Diverging hole; 323. Bearing roller; 33. Expansion sleeve; 34. Snap ring; 35. Water retaining ring; 36. Vane; 40. Circulation component; 41. Oil pot; 42. Pot cover; 43. Pressing part; 44. Filter disc; 45. Return pipe; 46. Flow valve. Specific Embodiment

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figure 1 - Figure 8 shown, the double-suction pump bearing lubrication chamber structure provided by the present invention includes a mounting base 10 fixed to the double-suction pump and a lubrication chamber 20 installed therein, and further includes a rotating body 30 rotatably penetrating through the lubrication chamber 20. The lubrication chamber 20 includes an oil sump 22 and an end cover 21 sealingly fitted on one side thereof. The oil sump 22 is communicated with a circulation component 40, and an oil distribution groove 225 for uniformly dispersing the oil liquid injected by the circulation component 40 is also provided therein; When this solution is in use, as the rotating body 30 rotates in the lubrication chamber 20, when it rotates at a low speed, first, the oil liquid accumulated and stored at the bottom of the lubrication chamber 20 keeps the bottom of the customized bearing 32 immersed for lubrication.

[0019] The circulation component 40 includes an oil pot 41 for measuring the oil liquid, and a flow valve 46 for controlling the circulation flow rate of the oil liquid is provided at the bottom end of the oil pot 41; When the rotational speed increases, the rotation of the blade 36 forms a pressure difference on the left and right in the lubrication chamber 20. The pressurized gas first enters the oil pot 41, causing the oil in the oil pot 41 to enter the oil return nozzle 223. As the oil in the lubrication chamber 20 increases, the oil enters the oil pot 41 for filtration and circulation, keeping the liquid level in the oil pot 41 basically constant after a partial decrease, and the oil is filtered and cooled during the circulation process to continuously lubricate the customized bearing 32, and this method reduces oil loss.

[0020] The rotating body 30 includes a rotating shaft 31 and a shrink disc 33 fixed thereon. The shrink disc 33 is provided with a customized bearing 32 and a number of blades 36. The customized bearing 32 includes a bearing outer ring 322, and the bearing outer ring 322 includes a ring body 01, a lubrication groove 02 opened on its inner wall, and a number of diversion holes 03 opened on the ring body 01 and communicating with the lubrication groove 02.

[0021] The shrink disc 33 can be fixed on the rotating shaft 31, while sleeving and pressing and fixing one side of the customized bearing 32. The circulating oil can enter the lubrication groove 02 of the customized bearing 32 for uniform lubrication operation.

[0022] By observing the height of the oil in the oil pot 41 after standing, the loss of the oil can be conveniently understood and replenished regularly.

[0023] Specifically, as Figure 1 shown, the mounting seat 10 includes a pump arm 11 integrally fixed with the double-suction pump. The upper surface of the pump arm 11 is fixed with a fixture 12 by screws, and the end cover 21 is fixed by cooperating with the fixture 12. The pump arm 11 is fixed on one side of the double-suction pump, and packing structures for sealing are provided on both sides of the pump casing of the double-suction pump to prevent internal water from leaking out. Therefore, the customized bearing 32 for supporting the rotating shaft 31 needs to be installed and supported in the axial position by the pump arm 11; The end cover 21 includes a sealing body 211, and a clamping edge 212 for cooperating with the fixture 12 and fitting into the inner wall of the pump arm 11 is provided on the surface of the sealing body 211. The fixture 12 on the pump arm 11 can cooperate to fix the end cover 21 during the process of being fixed to the pump arm 11 by screws. The clamping edge 212 is provided on the sealing body 211 of the end cover 21. When the fixture 12 clamps the pump arm 11, the clamping edge 212 can be fitted, so that the end cover 21 is fixed in a fixed direction. As Figure 4 shown, both sides of the clamping edge 212 are flat, which facilitates calibration in the vertical direction during the fitting process.

[0024] Specifically, as Figure 4 and Figure 5As shown in the figure, a left oil seal 213 that fits the surface of the rotating body 30 is provided on the inner wall of the end cap 21. A water retaining ring 35 is sleeved on the surface of the rotating shaft 31, and the water retaining ring 35 fits and slides on the inner wall of the left oil seal 213. When this solution is in use, as the rotating shaft 31 is driven to rotate, at this time the water retaining ring 35 rotates synchronously within the left oil seal 213. At this time, while the left oil seal 213 can maintain sealing, the water retaining ring 35 protects its outside to prevent external water bodies from impacting and passing through the left oil seal 213. At the same time, the right oil seal 222 directly fits the rotating shaft 31 to maintain the sealing of its surface.

[0025] Specifically, as Figure 6 shown, the oil sump 22 includes a sump body 221, and an oil return nozzle 223 and an oil outlet nozzle 224 are communicated with the surface of the sump body 221. A right oil seal 222 that fits the surface of the rotating shaft 31 is provided on the right side of the sump body 221. The oil return nozzle 223 and the oil outlet nozzle 224 can be conveniently docked and kept in communication. Among them, the oil return nozzle 223 is arranged at the top of the lubrication chamber 20, and can keep the oil fluid entering from the top. Combining with the flowing effect of the oil fluid under the action of gravity, and the rotation and stirring cooperation of the customized bearing 32, the oil fluid is evenly dispersed in the customized bearing 32, and the excess oil fluid is discharged during rotation. The discharged oil fluid increases the liquid level height of the oil fluid in the lubrication chamber 20, so that the excess oil fluid enters the oil pot 41 to supplement the oil fluid.

[0026] Specifically, as Figure 7 shown, the customized bearing 32 further includes a bearing inner ring 321 and a plurality of bearing rollers 323 arranged between the bearing inner ring 321 and the bearing outer ring 322. An annular lubrication groove 02 is opened in the rolling groove of the bearing roller 323 in the ring body 01 of the bearing outer ring 322 of the customized bearing 32. The oil fluid can be evenly dispersed in the lubrication groove 02, so that the bearing rollers 323 can have sufficient oil fluid supply at different positions to maintain lubrication. And the rolling groove fits with the customized rotor, and the excess oil fluid can be evenly discharged under the uniform dispersion of the lubrication groove 02, improving the overall stability.

[0027] Specifically, as Figure 8 shown, the rotating shaft 31 includes a shaft body 311 and a card slot 312 opened thereon. One side of the expansion sleeve 33 is provided with a snap ring 34 that cooperates with the card slot 312 to limit its position. With the setting of the card slot 312, after the rotating shaft 31 can be snapped into the card slot 312 through the snap ring 34, the expansion sleeve 33 can be limited to prevent axial displacement of the expansion sleeve 33, ensuring the pressing of the customized bearing 32 and meeting the stability requirements of the high-speed rotation environment.

[0028] Specifically, as Figure 3As shown, the circulation component 40 further includes a kettle lid 42 that is threadedly fitted to the top of the oil kettle 41 and communicates with the oil outlet nozzle 224. A filter sheet 44 for filtering oil is attached to the inner wall of the kettle lid 42. A pressing member 43 for filling filter cotton and pressing the filter sheet 44 is threadedly fitted to the inner wall of the kettle lid 42. The other end of the flow valve 46 communicates with a return pipe 45 that communicates with the oil return nozzle 223. The setting of the kettle lid 42 enables it to be separated from the oil kettle 41, facilitating the replacement and cleaning of the internal filter sheet 44 or filter cotton. At the same time, the filter sheet 44 in the kettle lid 42 can maintain a good filtering effect on the oil. The oil filtered by the filter sheet 44 can further filter out fine impurities during the further filtration of the filter cotton, facilitating the lubrication of the customized bearing 32 after the oil is filtered and preventing greater wear caused by the circulation of impurities. Among them, the pressing member 43 is fixedly threaded on the inner wall of the kettle lid 42, which can press the filter sheet 44 and is filled with filter cotton inside, and it can be unscrewed for replacement.

[0029] Specifically, as Figure 6 shown, the right side of the inner wall of the bin body 221 forms a conical inclined surface to form a pressurizing cavity, and several blades 36 are located in the pressurizing cavity. One side of the bin body 221 is provided with a conical inclined surface. This pressurizing cavity can keep part of the oil in the bin body 221 always retained and can discharge the excessive oil through the oil outlet nozzle 224. At the same time, the blades 36 rotate at this position, making a relative pressurized state formed on its right side, pressurizing the position of the oil outlet nozzle 224 to maintain the internal circulation.

[0030] In summary, this solution adopts a relatively sealed structure. While reducing the probability of internal oil leakage, it cancels the design of the traditional exhaust valve. During the rotation of the customized bearing 32, the bottom end is partially immersed in the oil. As it rotates, the oil is evenly carried and rotated. As the rotation speed increases, the heat of the customized bearing 32 increases, and the high-speed rotation of the blade 36 creates a pressure difference on both sides of the lubrication chamber 20. In the high-pressure area on the right side, the air in the lubrication chamber 20 is pressed into the oil pot 41. After the oil pot 41 is pressurized, the oil circulates through the return pipe 45. The oil flows back to the oil distribution groove 225 and, under the even distribution of a number of shunt holes 03, the oil flows into the lubrication groove 02 from multiple directions, ensuring that the customized bearing 32 is evenly lubricated. This method has a higher oil lubrication uniformity compared to the traditional lubrication method, effectively preventing the oil from being heated, stirred, or atomized due to repeated friction. As the oil continues to be added, the oil level in the lubrication chamber 20 rises, further strengthening the lubrication effect. And the excessive oil flowing out prevents the accumulation of too much oil. Through the filtration and return system, the oil can be continuously circulated, filtered, and cooled, improving the long-term stable operation ability of the customized bearing 32 at high speeds, reducing oil loss and extending the maintenance cycle. Moreover, the conical inclined surface design of the pressurization cavity ensures that the oil level in the lubrication chamber 20 is not too high, and the excess oil is discharged from the oil pot 41 through the oil outlet nozzle 224, avoiding lubrication problems caused by excessive or insufficient oil. During use, the opening and closing size of the flow control valve 46 can be controlled according to the power, further precisely controlling the oil circulation speed, preventing excessive oil from entering the customized bearing 32, and avoiding the phenomenon of oil churning, thereby maintaining a stable bearing temperature.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A bearing lubricating oil chamber structure for a double-suction pump, comprising a mounting seat (10) fixed to the double-suction pump and a lubricating chamber (20) mounted therein, and also comprising a rotating body (30) penetrating and rotating in the lubricating chamber (20), characterized in that: The lubrication chamber (20) comprises an oil bin (22) and an end cover (21) which is sealed on one side thereof; the oil bin (22) is connected to a circulation component (40) and is provided with an oil distribution groove (225) for evenly dispersing the oil of the circulation component (40) after injection; The circulation component (40) comprises an oil pot (41) for measuring oil, and a flow valve (46) for controlling the circulation flow of the oil is arranged at the bottom end of the oil pot (41); The rotating body (30) comprises a rotating shaft (31) and a tightening sleeve (33) fixed thereon, and a customized bearing (32) and a plurality of blades (36) are arranged on the tightening sleeve (33), the customized bearing (32) comprises a bearing outer ring (322), the bearing outer ring (322) comprises a ring body (01) and a lubrication groove (02) provided on the inner wall thereof, and a plurality of diversion holes (03) provided on the ring body (01) and connected to the lubrication groove (02).

2. The bearing lubricating oil chamber structure for a double-suction pump according to claim 1, characterized in that: The mounting seat (10) comprises a pump arm (11) fixed integrally with the double-suction pump, a clamp (12) being fixed to the upper surface of the pump arm (11) by means of screws, and the clamp (12) is fixed to the end cover (21) in cooperation with the end cover.

3. The bearing lubricating oil chamber structure for a double-suction pump according to claim 2, characterized in that: The end cover (21) comprises a sealing body (211), and a surface of the sealing body (211) is provided with a clamping edge (212) for fitting with the clamp (12) and the inner wall of the pump arm (11), and an inner wall of the end cover (21) is provided with a left oil seal (213) for fitting with the surface of the rotating body (30).

4. The bearing lubricating oil chamber structure for a double-suction pump according to claim 3, characterized in that: The oil bin (22) comprises a bin body (221), and the surface of the bin body (221) is connected to an oil return nozzle (223) and an oil outlet nozzle (224). The right side of the bin body (221) is provided with a right oil seal (222) that is in contact with the surface of the rotating shaft (31).

5. The bearing lubricating oil chamber structure for a double-suction pump according to claim 4, characterized in that: A water retaining ring (35) is sleeved on the surface of the rotating shaft (31), and the water retaining ring (35) slides on the inner wall of the left oil seal (213).

6. The bearing lubricating oil chamber structure for a double-suction pump according to claim 1, characterized in that: The customized bearing (32) further comprises a bearing inner ring (321) and a plurality of bearing rollers (323) arranged between the bearing inner ring (321) and the bearing outer ring (322).

7. The bearing lubricating oil chamber structure for a double-suction pump according to claim 1, characterized in that: The rotating shaft (31) comprises a shaft body (311) and a clamping groove (312) provided thereon, and a clamping ring (34) is provided on one side of the expansion sleeve (33) for cooperating with the clamping groove (312) to limit the position thereof.

8. The bearing lubricating oil chamber structure for a double-suction pump according to claim 4, characterized in that: The circulation assembly (40) further comprises a pot cover (42) threadedly engaged with the top of the oil pot (41) and connected to the oil outlet nozzle (224); a filter disc (44) for oil filtering is attached to the inner wall of the pot cover (42); a pressing piece (43) for filling filter cotton and pressing the filter disc (44) is threadedly engaged with the inner wall of the pot cover (42); and the other end of the flow valve (46) is connected to a return pipe (45) connected to the oil return nozzle (223).

9. The bearing lubricating oil chamber structure for a double-suction pump according to claim 8, characterized in that: The right side of the inner wall of the bin body (221) is formed into a conical inclined surface to form a pressurized cavity, and a plurality of blades (36) are located in the pressurized cavity.

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