A bearing housing lubricating oil cooling system for a centrifugal pump

Abstract

This utility model discloses a lubricating oil cooling system for a centrifugal pump bearing housing, including a pump body, the pump body including a bearing housing, and a rotating shaft rotatably disposed in the bearing housing. The bearing housing is characterized by having a first liquid guiding chamber and a second liquid guiding chamber, with a spiral tube sleeved on the outer side of the bearing housing. A fan structure is fixedly disposed on the rotating shaft, blowing air towards the spiral tube. An intermediate impeller located in the second liquid guiding chamber is fixedly disposed on the outer surface of the rotating shaft. A circulation pipeline assembly connects the first liquid guiding chamber, the second liquid guiding chamber, and the spiral tube. During circulation, the fan's blowing action cools the lubricating oil in the spiral tube. Due to the structural design of the spiral tube, the contact area is increased while the oil passage length is extended, allowing the lubricating oil to remain for a longer time and improving the heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil cooling technology for centrifugal pump bearing housings, specifically a lubricating oil cooling system for centrifugal pump bearing housings. Background Technology

[0002] The lubrication and cooling system of the bearing housing is crucial during the operation of a centrifugal pump. Existing technologies have the following problems:

[0003] 1. The cooling structure design is unreasonable. Existing cooling systems mostly adopt simple air cooling methods, with limited cooling area and insufficiently optimized oil circuit design, which cannot meet the requirements of efficient heat dissipation.

[0004] 2. Cooling fans are easily disturbed by external debris during operation, which can damage or jam the fan blades, affecting the cooling effect and even causing safety accidents.

[0005] In summary, existing centrifugal pump bearing housing lubricating oil cooling systems have shortcomings in terms of heat dissipation efficiency, cooling structure, and fan protection. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a lubricating oil cooling system for bearing housings of centrifugal pumps that can improve heat dissipation efficiency, optimize cooling structure, enhance fan protection, and simplify circulation system, thereby solving the problems in the prior art.

[0007] This utility model is achieved through the following technical solution: A centrifugal pump bearing housing lubricating oil cooling system of this utility model includes a pump body, the pump body includes a bearing housing, and a rotating shaft is rotatably arranged in the bearing housing. The bearing housing is characterized in that a first liquid guiding chamber and a second liquid guiding chamber are arranged inside the bearing housing, a spiral tube is sleeved on the outside of the bearing housing, a fan structure that blows air toward the spiral tube is fixedly arranged on the rotating shaft, an intermediate impeller located in the second liquid guiding chamber is fixedly arranged on the outer surface of the rotating shaft, and a circulation pipeline assembly is connected between the first liquid guiding chamber, the second liquid guiding chamber and the spiral tube.

[0008] A further technical solution includes a fan structure, a connecting seat fixedly provided on the outer surface of the rotating shaft, the connecting seat being connected and fixed to the fan, the connecting seat being connected and fixed to the fan by means of fastener disassembly connection, and a cover assembly for protecting the fan being provided on the bearing housing.

[0009] A further technical solution is that the cover assembly includes two separate outer shells, one of which has a sleeve fixedly installed at its end, and the sleeve is fitted onto the outer surface of the bearing housing.

[0010] In a further technical solution, an inner ring is provided on the inner side of the outer shell, and multiple connecting rods are fixedly provided between the inner ring and the outer shell.

[0011] A further technical solution includes a circulation pipeline assembly comprising a second manual valve connected to the top of the first liquid guiding chamber, a three-way pipe connected to the top of the second manual valve, a first manual valve connected to one of the channels of the three-way pipe, and a fourth pipe connected to the other channel of the three-way pipe, the fourth pipe being connected to the second liquid guiding chamber.

[0012] In a further technical solution, the intermediate impeller is a centrifugal impeller, which pumps the lubricating oil in the second liquid guiding chamber toward the fourth pipe.

[0013] In a further technical solution, a first tube is connected to one end of the spiral tube, a third manual valve is connected to one side of the first tube, the third manual valve is connected to the bottom of the first liquid guiding chamber, a second tube is connected to the other end of the spiral tube, a third tube is connected to one side of the bottom of the second liquid guiding chamber, and the third tube is connected to the second tube.

[0014] In a further technical solution, a support frame is fixedly installed on the lower side of the bearing housing.

[0015] The beneficial effects of this utility model are as follows: First, the lubricating oil flows back into the second liquid guiding chamber after passing through the fourth pipe, the second manual valve, the first liquid guiding chamber, the third manual valve, the first pipe, the spiral pipe, the second pipe, and the third pipe, thus realizing the circulation of lubricating oil. After setting the first pipe and the second pipe at both ends of the spiral pipe respectively, the third manual valve is connected to the third pipe to form a complete lubricating oil circulation loop. The lubricating oil is a room temperature liquid lubricating oil. During circulation, the lubricating oil in the spiral pipe is cooled by the blowing of the fan. Due to the structural design of the spiral pipe, the contact area is increased and the length of the oil passage is extended, so that the lubricating oil stays for a longer time and the heat dissipation effect is improved.

[0016] Second, an outer casing was installed on the outside of the fan to cover it and prevent larger debris from entering the fan and causing it to malfunction. Attached Figure Description

[0017] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a bearing housing lubricating oil cooling system for a centrifugal pump according to the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the intermediate cooling system after removing the reference numerals;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the spiral tube, the first tube, and the second tube in the AA direction;

[0021] Figure 4 for Figure 2 A schematic diagram of the inner and outer shell in the B direction;

[0022] In the figure, the components are: pump casing 11, pump inlet 12, impeller 13, shaft 14, mechanical seal 15, bearing housing 16, third manual valve 17, first pipe 18, support frame 19, spiral pipe 21, second pipe 22, third pipe 23, intermediate impeller 24, connecting seat 25, fan 27, sleeve 28, connecting rod 29, outer shell 31, second liquid guiding chamber 32, fourth pipe 33, second manual valve 34, first manual valve 35, three-way pipe 36, first liquid guiding chamber 37, outlet 38, inner ring 39, and fixing plate 41. Detailed Implementation

[0023] like Figures 1-4 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The projection relationships of this utility model are consistent in the up, down, left, right, front, and back directions. A centrifugal pump bearing housing lubricating oil cooling system includes a pump body, which includes a bearing housing 16. A rotating shaft 14 is rotatably mounted in the bearing housing 16. A first liquid guiding chamber 37 and a second liquid guiding chamber 32 are provided inside the bearing housing 16. A spiral tube 21 is sleeved on the outside of the bearing housing 16. A fan structure is fixedly mounted on the rotating shaft 14. An intermediate impeller 24 located in the second liquid guiding chamber 32 is fixedly mounted on the outer surface of the rotating shaft 14. A circulation pipeline assembly is connected between the first liquid guiding chamber 37, the second liquid guiding chamber 32, and the spiral tube 21. The lubricating oil in the first liquid guiding chamber 37, the second liquid guiding chamber 32, and the spiral tube 21 is circulated through the circulation pipeline and blown and spread to the external space by the fan structure to achieve the lubricating oil cooling function. The spiral tube 21 has a spiral disc structure, with one end connected to the first liquid guiding chamber 37 and the other end connected to the second liquid guiding chamber 32.

[0024] Advantageously, the pump body also includes a pump casing 11, an output port 38 is provided inside the pump casing 11, a pump input port 12 is provided on the other side of the pump casing 11, and an impeller 13 is fixedly provided on the outer surface of the rotating shaft 14. The impeller 13 is located in the output port 38. By rotating the rotating shaft 14 and the impeller 13, the fluid introduced from the pump input port 12 is pumped upward from the output port 38.

[0025] Advantageously, the pump body also includes a fixing plate 41 that is connected and fixed to the pump casing 11. The fixing plate 41 is connected and fixed to the bearing housing 16. A mechanical seal 15 is provided on the outer surface of the rotating shaft 14. The mechanical seal 15 is connected and fixed to the fixing plate 41. The above connection and fixing can also be a fastener disassembly type connection.

[0026] Advantageously, the fan structure includes a fan 27, a connecting seat 25 is fixedly provided on the outer surface of the rotating shaft 14, the connecting seat 25 is connected and fixed to the fan 27, and the connecting seat 25 and the fan 27 can be connected by fastener disassembly, and a cover assembly for protecting the fan 27 is provided on the bearing housing 16.

[0027] Advantageously, the cover assembly includes two separate housings 31, which are connected and fixed together by fasteners. One of the housings 31 has a sleeve 28 fixedly installed at its end. The sleeve 28 is fitted onto the outer surface of the bearing housing 16 and is fixedly connected and fixed by fasteners. An inner ring 39 is provided on the inner side of the housing 31. Multiple connecting rods 29 are fixedly installed between the inner ring 39 and the housing 31. This structure is used to prevent large debris from entering the fan 27 and getting tangled in the fan 27.

[0028] Advantageously, the circulation pipeline assembly includes a second manual valve 34 connected to the top of the first liquid guiding chamber 37. A three-way pipe 36 is connected to the top of the second manual valve 34. One channel of the three-way pipe 36 is connected to the first manual valve 35, and the other channel of the three-way pipe 36 is connected to the fourth pipe 33. The fourth pipe 33 is connected to the second liquid guiding chamber 32. The intermediate impeller 24 is a centrifugal impeller that pumps the lubricating oil in the second liquid guiding chamber 32 toward the fourth pipe 33.

[0029] Advantageously, one end of the spiral tube 21 is connected to a first tube 18, a third manual valve 17 is connected to one side of the first tube 18, the third manual valve 17 is connected to the bottom of the first liquid guiding chamber 37, the other end of the spiral tube 21 is connected to a second tube 22, a third tube 23 is connected to one side of the bottom of the second liquid guiding chamber 32, and the third tube 23 is connected to the second tube 22.

[0030] Advantageously, a support frame 19 is fixedly installed on the lower side of the bearing housing 16, and the support frame 19 is connected and fixed to the pump base.

[0031] When the system is in operation, the first manual valve 35 is opened to allow lubricating oil to flow through it, so that the level of the lubricating oil is higher than that of the three-way pipe 36. This fills the three-way pipe 36, the first liquid guiding chamber 37, the first pipe 18, the spiral pipe 21, the third pipe 23, the second liquid guiding chamber 32, and the fourth pipe 33 with lubricating oil. Then the first manual valve 35 is closed.

[0032] When the pump is working, the rotating shaft 14 is driven to rotate by the motor, which drives the intermediate impeller 24 to rotate. This causes the lubricating oil in the second liquid guiding chamber 32 to be pumped from the third pipe 23 to the fourth pipe 33. After passing through the fourth pipe 33, the second manual valve 34, the first liquid guiding chamber 37, the third manual valve 17, the first pipe 18, the spiral pipe 21, the second pipe 22, and the third pipe 23, the lubricating oil flows back into the second liquid guiding chamber 32, thus realizing the circulation of lubricating oil.

[0033] During the rotation of the shaft 14, the connecting seat 25 is driven to rotate. Due to the structural design of the spiral tube 21, the contact area is increased. During the rotation of the connecting seat 25, air can be blown towards the spiral tube 21 to achieve air cooling of the spiral tube 21.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A bearing housing lubricating oil cooling system for a centrifugal pump, comprising a pump body, the pump body comprising a bearing housing (16) in which a rotating shaft (14) is arranged to rotate, characterised in that, The bearing housing (16) is provided with a first liquid guiding chamber (37) and a second liquid guiding chamber (32). A spiral tube (21) is sleeved on the outside of the bearing housing (16). A fan structure that blows air toward the spiral tube (21) is fixedly installed on the rotating shaft (14). An intermediate impeller (24) located in the second liquid guiding chamber (32) is fixedly installed on the outer surface of the rotating shaft (14). A circulation pipeline assembly is connected between the first liquid guiding chamber (37), the second liquid guiding chamber (32) and the spiral tube (21).

2. The bearing housing lubricating oil cooling system for a centrifugal pump according to claim 1, characterized in that: The fan structure includes a fan (27), and a connecting seat (25) is fixedly provided on the outer surface of the rotating shaft (14). The connecting seat (25) is connected and fixed to the fan (27). The connecting seat (25) and the fan (27) are connected and fixed by fastener disassembly. A cover assembly for protecting the fan (27) is provided on the bearing housing (16).

3. The bearing housing lubricating oil cooling system for a centrifugal pump according to claim 2, characterized in that: The cover assembly includes two separate housings (31), one of which has a sleeve (28) fixedly mounted at one end, the sleeve (28) being fitted onto the outer surface of the bearing housing (16).

4. The bearing housing lubricating oil cooling system for a centrifugal pump according to claim 3, characterized in that: An inner ring (39) is provided on the inner side of the outer shell (31), and a plurality of connecting rods (29) are fixedly provided between the inner ring (39) and the outer shell (31).

5. A lubricating oil cooling system for a bearing housing of a centrifugal pump according to any one of claims 1-4, characterized in that: The circulation pipeline assembly includes a second manual valve (34) communicating with the top of the first liquid guiding chamber (37). A three-way pipe (36) is connected to the top of the second manual valve (34). One channel of the three-way pipe (36) is connected to a first manual valve (35), and the other channel of the three-way pipe (36) is connected to a fourth pipe (33). The fourth pipe (33) is connected to the second liquid guiding chamber (32).

6. A centrifugal pump bearing housing lubricating oil cooling system according to claim 5, characterized in that: The intermediate impeller (24) is a centrifugal impeller that pumps the lubricating oil in the second liquid guiding chamber (32) toward the fourth pipe (33).

7. A centrifugal pump bearing housing lubricating oil cooling system according to claim 5, characterized in that: One end of the spiral tube (21) is connected to a first tube (18), and a third manual valve (17) is connected to one side of the first tube (18). The third manual valve (17) is connected to the bottom of the first liquid guiding chamber (37). The other end of the spiral tube (21) is connected to a second tube (22), and a third tube (23) is connected to one side of the bottom of the second liquid guiding chamber (32). The third tube (23) is connected to the second tube (22).

8. A lubricating oil cooling system for a bearing housing of a centrifugal pump according to claim 1, characterized in that: A support frame (19) is fixedly installed on the lower side of the bearing housing (16).

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