Blower supporting and pushing bearing bush

Abstract

The utility model relates to an air blower supporting and pushing bearing bush which comprises a bearing bush body and a thrust plate vertically connected to the outer circumference of the bearing bush body, a plurality of oil guide grooves are formed in the surface of the thrust plate, the oil guide grooves extend in the radial direction of the thrust plate, and all the areas between the adjacent oil guide grooves serve as main thrust faces. An oil guide groove is formed in the center of the thrust plate, the top of the oil guide groove is flush with the main thrust surface, an oil passing hole is formed in the groove bottom of the oil guide groove, and an oil discharging groove is formed in the end, far away from the center of the thrust plate, of the oil guide groove. The stable operation of the phthalic anhydride blower is influenced, and the maintenance is frequent.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical parts technology, specifically relating to a blower support bearing. Background Technology

[0002] The process flow for phthalic anhydride involves mixing heated air with the feedstock o-xylene, vaporizing the air-mixed o-xylene, and then sending it to a reactor for catalytic reaction. The vapor phase at the reactor outlet is condensed to recover the phthalic anhydride; the tail gas enters a tail gas absorption tower for absorption, and the recovered tail gas is directly discharged; the condensed and recovered crude phthalic anhydride is processed by a pre-processor and then enters a distillation system to recover the light and heavy components. The distilled phthalic anhydride is output from the top of the heavy component tower. Currently, the phthalic anhydride vaporization and mixing method involves using a blower to send purified air into an air heater for heating, and then the heated air is piped to the reactor to mix with o-xylene. During blower operation, especially in high temperatures above 35°C and with an air volume of 100,000 Nm³, the process becomes particularly challenging. 3 Under high load conditions, the temperature of the main thrust surface of the low-speed shaft thrust bearing is high, with an operating temperature of around 100℃ and a seat temperature exceeding 105℃, far exceeding the normal operating temperature of 80℃ for the bearing. This poses a serious safety hazard to the blower operation, which can only maintain a low air volume. Utility Model Content

[0003] In view of the shortcomings of the existing technology, a blower support bearing is proposed to solve the technical problem that the actual operating temperature of the support bearing of the phthalic anhydride blower is higher than its normal operating temperature under high load conditions, which affects the stable operation of the phthalic anhydride blower and causes frequent maintenance.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A blower support bearing includes a bearing body and a thrust plate vertically connected to the outer circumference of the bearing body. The surface of the thrust plate is provided with a plurality of oil guide grooves, which extend radially along the thrust plate. The entire area between adjacent oil guide grooves serves as the main thrust surface. The top of the oil guide groove is flush with the main thrust surface. The bottom of the oil guide groove is provided with an oil passage hole. An oil discharge groove is provided at the end of the oil guide groove away from the center of the thrust plate.

[0006] The technical solution is further configured such that the oil guide groove includes a first end and a second end, the first end being close to the center of the thrust plate, and the first end having an opening.

[0007] The technical solution is further configured such that one end of the oil unloading groove is connected to the second end of the oil guide groove, and the other end of the oil unloading groove extends to the edge of the thrust plate.

[0008] The technical solution is further configured such that the top groove width of the oil guide groove is greater than its bottom groove width.

[0009] The technical solution is further configured such that the bearing body is provided with a connected oil inlet hole, a first oil groove and a second oil groove. The oil inlet hole is arranged radially along the bearing body, the first oil groove is arranged circumferentially along the bearing body, and the second oil groove is arranged axially along the bearing body. The second oil groove is arranged corresponding to the oil inlet hole, and the first oil groove is connected between adjacent second oil grooves.

[0010] The technical solution is further configured such that, along the axial direction of the bearing body, a plurality of the first oil grooves are provided at intervals.

[0011] The technical solution is further configured such that an oil-passing main channel is provided inside the bearing body and along its circumference, and the oil-passing main channel is connected to the oil-passing hole and the oil inlet hole through oil-passing branch channels respectively.

[0012] The technical solution is further configured such that a first guiding slope is provided at the junction of the oil passage hole and the oil guide groove, and a second guiding slope is provided at the junction of the oil passage hole and the oil passage branch channel.

[0013] The technical solution is further configured such that a nickel plating layer and a tin-copper plating layer are provided on the inner circumference of the bearing body, and the nickel plating layer is located between the inner circumference of the bearing body and the tin-copper plating layer.

[0014] The beneficial effects of this utility model are:

[0015] By setting up oil guide grooves, oil passage holes, and oil discharge grooves, the oil accumulated on the surface of the thrust bearing can be guided to the edge of the thrust bearing. Some of the oil serves as lubricant between the thrust bearing and the structure that fixes and positions it, while also reducing oil accumulation, preventing cavitation on the surface of the thrust bearing, and ensuring the service life of the thrust bearing. The entire area between adjacent oil guide grooves serves as the main thrust surface, increasing the contact area of ​​the main thrust surface of the thrust bearing. Under high load operation, its load-bearing capacity is enhanced, which can better offset the axial force of the blower rotor while reducing the unit compression of the contact area, thereby reducing the heat generation per unit area, lowering the actual operating temperature of the thrust bearing, ensuring the stable operation of the phthalic anhydride blower, and reducing the maintenance frequency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the blower support bearing in an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Partial schematic diagram at point A in the middle;

[0018] Figure 3 This is a cross-sectional view of the oil passage in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of another embodiment of the blower support bearing in this utility model.

[0020] In the attached diagram: 1. Bearing body; 2. Thrust plate; 3. Oil guide groove; 4. Oil passage hole; 5. Oil discharge groove; 6. Oil inlet hole; 7. First oil groove; 8. Second oil groove; 9. Main oil passage channel; 10. Supporting oil passage channel; 11. First guide slope; 12. Second guide slope; 13. Main thrust surface. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0023] According to an embodiment of this utility model, a blower support bearing is provided. Please refer to [link / reference]. Figures 1 to 3 It includes a bearing body 1 and a thrust plate 2 vertically connected to the outer circumference of the bearing body 1. The surface of the thrust plate 2 is provided with a plurality of oil guide grooves 3. The oil guide grooves 3 extend radially along the thrust plate 2. The entire area between adjacent oil guide grooves 3 serves as the main thrust surface 13. The top of the oil guide groove 3 is flush with the main thrust surface 13. The bottom of the oil guide groove 3 is provided with an oil passage hole 4. The end of the oil guide groove 3 away from the center of the thrust plate 2 is provided with an oil discharge groove 5.

[0024] It should be noted that by setting the oil guide groove 3, oil passage hole 4, and oil discharge groove 5, the oil accumulated on the surface of the thrust plate 2 can be guided to the edge of the thrust plate 2. Part of the oil serves as lubricant between the thrust plate 2 and the structure that fixes and positions it, which can reduce oil accumulation, prevent cavitation on the surface of the thrust plate 2, and ensure the service life of the thrust plate 2. The entire area between adjacent oil guide grooves 3 serves as the main thrust surface 13, which increases the contact area of ​​the main thrust surface of the thrust bearing. Under high load operation, its load-bearing capacity is enhanced, which can better offset the axial force of the blower rotor while reducing the unit pressure of the contact area, thereby reducing the heat generation per unit area, lowering the actual operating temperature of the thrust bearing, ensuring the stable operation of the phthalic anhydride blower, and reducing the maintenance frequency.

[0025] In actual use, the temperature is above 35℃ and the air volume is 100,000 Nm. 3 Under the highest load condition, the operating temperature of the main thrust surface of the blower support bearing is reduced to 70℃, achieving the goal of long-term stable operation of the phthalic anhydride blower and increasing production capacity.

[0026] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 The oil guide groove 3 includes a first end and a second end. The first end is close to the center of the thrust plate 2 and has an opening, while the second end is closed.

[0027] It should be noted that the oil enters the oil guide groove 3 through the opening, and part of the oil is stored inside the oil guide groove 3 as lubricant to reduce the wear of the thrust plate 2, while part of the oil flows back through the oil hole 4.

[0028] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 One end of the oil unloading groove 5 is connected to the second end of the oil guide groove 3, and the other end of the oil unloading groove 5 extends to the edge of the thrust plate 2.

[0029] It should be noted that excess oil inside the oil guide groove 3 is discharged through the oil discharge groove 5 to the thrust plate 2 to prevent oil accumulation. The oil discharged from the oil discharge groove 5 cannot be returned. To minimize oil waste, only a portion of the oil is discharged through the oil discharge groove 5 when excess oil is stored there. Therefore, the depth of the oil discharge groove 5 is less than the depth of the oil guide groove 3. Preferably, the depth of the oil discharge groove 5 is one-third the depth of the oil guide groove 3, and the top of the oil discharge groove 5 is also flush with the main thrust surface 13.

[0030] Specifically, the oil guide groove 3 and the oil unloading groove 5 are both elongated oval grooves, rectangular grooves or V-shaped grooves, and the diameter of the oil passage hole 4 is 2-3mm. Under the premise that the oil guide groove 3 stores oil, the circulation efficiency of the oil is maximized and the heat generation is reduced as much as possible.

[0031] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 The top width of the oil guide groove 3 is greater than its bottom width.

[0032] It should be noted that the inclined walls of the oil guide groove 3 guide the oil.

[0033] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 The bearing body 1 is provided with an oil inlet hole 6, a first oil groove 7 and a second oil groove 8 that are connected. The oil inlet hole 6 is arranged radially along the bearing body 1, the first oil groove 7 is arranged circumferentially along the bearing body 1, and the second oil groove 8 is arranged axially along the bearing body 1. The second oil groove 8 is arranged corresponding to the oil inlet hole 6, and the first oil groove 7 is connected between adjacent second oil grooves 8.

[0034] It should be noted that the oil is injected into the second oil groove 8 through the oil inlet 6. The second oil groove 8 is connected to the oil guide groove 3 through the transition ring groove. The first oil groove 7 is connected between adjacent second oil grooves 8, which can increase the conduction area of ​​the oil groove and facilitate the storage of oil, thus greatly improving the lubrication efficiency. The transition ring groove is set along the circumference of the thrust plate 2. The openings of several oil guide grooves 3 are all connected to the transition ring groove. At the same time, the transition ring groove is connected to the end of the second oil groove 8.

[0035] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 4 Along the axial direction of the bearing body 1, several first oil grooves 7 are arranged at intervals to further increase the oil storage capacity.

[0036] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 The bearing body 1 has an oil passage 9 inside and along its circumference. The oil passage 9 is connected to the oil passage hole 4 and the oil inlet hole 6 through the oil passage branch channel 10.

[0037] It should be noted that the oil in the oil guide groove 3 flows through the oil hole 4 and the oil branch channel 10 to the main oil channel 9. The oil in the main oil channel 9 then flows through the oil branch channel 10 to the oil inlet hole 6, and then enters the second oil groove 8 to achieve backflow.

[0038] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 A first guide slope 11 is provided at the junction of the oil passage 4 and the oil guide groove 3, and a second guide slope 12 is provided at the junction of the oil passage 4 and the oil passage branch channel 10.

[0039] It should be noted that both the first guide slope 11 and the second guide slope 12 guide the oil to accelerate its circulation.

[0040] In the blower thrust bearing of this embodiment, please refer to Figures 1 to 3 The inner circumference of the bearing body 1 is provided with a nickel plating layer and a tin-copper plating layer, and the nickel plating layer is located between the inner circumference of the bearing body 1 and the tin-copper plating layer.

[0041] It should be noted that the nickel plating acts between the inner circumference of the bearing body 1 and the tin-copper plating, making the tin-copper plating tightly bonded to the inner circumference of the bearing body 1. The use of tin-copper plating solves the problem of high load-bearing capacity affecting service life. At the same time, since tin is a soft metal, it further improves lubricity.

[0042] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A bushing for a blower propeller, characterized in that The bearing bush body and the thrust plate connected perpendicularly on the outer circumference of the bearing bush body, the surface of the thrust plate is provided with several oil guide grooves, the oil guide grooves extend radially along the thrust plate, the whole area between adjacent oil guide grooves is the main thrust surface, the top of the oil guide groove is flush with the main thrust surface, the bottom of the oil guide groove is provided with an oil passing hole, and the end of the oil guide groove away from the center of the thrust plate is provided with an oil discharging groove.

2. The air blower thrust bearing bushing of claim 1, wherein, The oil guide groove comprises a first end and a second end, the first end is close to the center of the thrust plate, and the first end is provided with an opening.

3. The blower thrust bearing of claim 2, wherein, One end of the oil discharging groove communicates with the second end of the oil guide groove, and the other end of the oil discharging groove extends to the edge of the thrust plate.

4. The air blower thrust bearing of claim 1, wherein, The top groove width of the oil guide groove is greater than the bottom groove width.

5. The air blower thrust bearing of claim 1, wherein, The bearing bush body is provided with an oil inlet hole, a first oil groove and a second oil groove in communication, the oil inlet hole is arranged along the radial direction of the bearing bush body, the first oil groove is arranged along the circumferential direction of the bearing bush body, and the second oil groove is arranged along the axial direction of the bearing bush body.

6. The air blower thrust bearing of claim 5, wherein, The first oil groove is arranged at intervals along the axial direction of the bearing bush body.

7. The air blower thrust bearing of claim 5, wherein, The inner part of the bearing bush body is provided with an oil passing main channel along the circumferential direction, and the oil passing main channel communicates with the oil passing hole and the oil inlet hole through oil passing branch channels.

8. The air blower thrust bearing of claim 7, wherein, The first guide slope is arranged at the joint of the oil passing hole and the oil guide groove, and the second guide slope is arranged at the joint of the oil passing hole and the oil passing branch channel.

9. The air blower thrust bearing of claim 1, wherein, The inner circumference of the bearing bush body is provided with a nickel plating layer and a tin copper plating layer, and the nickel plating layer is located between the inner circumference of the bearing bush body and the tin copper plating layer.

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