Three oil-spinning Roots blower

Abstract

The present invention provides a three-oil-slinging Roots blower, comprising a casing, a left wall panel, a right wall panel, an auxiliary oil tank, and a main oil tank. An active impeller shaft and a driven impeller shaft are installed inside a working chamber formed by the casing, the left wall panel, and the right wall panel. A left bearing is provided between the left end of the active impeller shaft and the left wall panel. A sealing seat is provided on the right side of the left bearing. An oil baffle and a sealing bushing are provided inside the sealing seat. A sealing ring is provided between the sealing bushing and the sealing seat. A locking inner sleeve is provided on the left side of the left bearing. An oil-slinging pan is installed on the locking inner sleeve. A third oil-slinging pan is installed on the left side of the oil-slinging pan. After adding an oil-slinging pan, the oil bath is more sufficient and the lubrication effect is better. The outer annular surface of the newly added third oil-slinging pan adopts a conical surface design, which forms a small conical gas surface under high-speed rotation, effectively avoiding contact with the skeleton oil seal, increasing the service life of the skeleton oil seal, and reducing the risk of oil leakage from the skeleton oil seal.

Description

Technical Field

[0001] The invention relates to the technical field of Roots blowers, in particular to a three-oil-spinning-pan Roots blower. Background Art

[0002] Existing Roots blowers typically have two oil-slinging plates that act as a splash oil bath. Because long-term operation can cause significant damage to the oil seals, leading to oil leakage, better control of oil leakage is essential. Traditional Roots blowers, on the other hand, only have two oil-slinging plates to create a splash oil bath, leaving only the oil seal at the shaft extension. For companies with stringent environmental requirements, prolonged operation of the blower cannot achieve both the desired splash oil bath and a leak-proof performance.

[0003] With the increasing efforts in environmental protection and the improvement of environmental quality requirements in industrial workshops, it is necessary to better avoid oil leakage of Roots blowers and improve oil bath capacity. To achieve the above two points, the present invention provides a design of a three-oil-spinning Roots blower. Summary of the Invention

[0004] In order to better avoid oil leakage of the Roots blower and improve the oil bath capacity, the present invention provides a three-oil-slinging pan Roots blower, which is improved from the original two-oil-slinging pan Roots blower to a three-oil-slinging pan Roots blower. After adding an oil-slinging pan, the oil bath is more sufficient and the lubrication effect is better; the outer annular surface of the newly added third oil-slinging pan adopts a conical surface design, and a small conical gas surface is formed under high-speed rotation, so that the lubricating oil splashed close to the skeleton oil seal is blocked by the formed conical gas surface, effectively avoiding contact with the skeleton oil seal, thereby increasing the service life of the skeleton oil seal and reducing the risk of oil leakage from the skeleton oil seal.

[0005] To this end, the technical solution of the present invention is a three-oil-spinning Roots blower, comprising a casing, a left wall panel, a right wall panel, an auxiliary oil tank and a main oil tank, wherein a driving impeller shaft and a driven impeller shaft are installed inside a working chamber formed by the casing, the left wall panel and the right wall panel;

[0006] The left end of the active impeller shaft passes through the auxiliary oil tank. A left bearing is provided between the left end of the active impeller shaft and the left wall plate. The active impeller shaft is rotatably connected to the left wall plate through the left bearing. A sealing seat is provided on the right side of the left bearing. An oil baffle and a sealing bushing are provided inside the sealing seat. An O-ring is provided between the sealing bushing and the active impeller shaft. A sealing ring is provided between the sealing bushing and the sealing seat. A locking inner sleeve is provided on the left side of the left bearing. The locking inner sleeve is fixedly connected to the active impeller shaft. An oil flinging pan is installed on the locking inner sleeve. A third oil flinging pan is installed on the left side of the oil flinging pan.

[0007] An oil seal sleeve is provided between the left end of the active impeller shaft and the auxiliary oil tank, a sealing ring is provided between the oil seal sleeve and the active impeller shaft, and a skeleton oil seal is provided between the oil seal sleeve and the auxiliary oil tank;

[0008] A right bearing is provided between the right end of the active impeller shaft and the right wall panel. The active impeller shaft is rotatably connected to the right wall panel through the right bearing. A sealing seat is provided on the left side of the right bearing. An oil baffle and a sealing bushing are provided inside the sealing seat. An O-ring is provided between the sealing bushing and the active impeller shaft. A sealing ring is provided between the sealing bushing and the sealing seat. A bearing gland is provided on the right side of the right bearing. The bearing gland is fixedly connected to the right wall panel by gland bolts. A driving gear is provided on the right side of the bearing gland. A gear washer is provided between the driving gear and the bearing gland, and a tightening sleeve is provided at the right end of the driving gear.

[0009] Preferably, a left bearing is provided between the left end of the driven impeller shaft and the left wall panel, and the driven impeller shaft is rotatably connected to the left wall panel through the left bearing. A sealing seat is provided on the right side of the left bearing, and an oil deflector and a sealing sleeve are provided inside the sealing seat. An O-ring is provided between the sealing sleeve and the driven impeller shaft, and a sealing ring is provided between the sealing sleeve and the sealing seat. A locking inner sleeve is provided on the left side of the left bearing, and the locking inner sleeve is fixedly connected to the active impeller shaft, and an oil flinger is installed on the locking inner sleeve.

[0010] Preferably, a right bearing is provided between the right end of the driven impeller shaft and the right wall panel, and the driven impeller shaft is rotatably connected to the right wall panel through the right bearing, a sealing seat is provided on the left side of the right bearing, an oil baffle and a sealing bushing are provided inside the sealing seat, an O-ring is provided between the sealing bushing and the driven impeller shaft, a sealing ring is provided between the sealing bushing and the sealing seat, a bearing pressure cover is provided on the right side of the right bearing, the bearing pressure cover is fixedly connected to the right wall panel by pressure cover bolts, a driven gear is provided on the right side of the bearing pressure cover, a gear washer is provided between the driven gear and the bearing pressure cover, and a tightening sleeve is provided at the right end of the driven gear.

[0011] Preferably, the third oil-spinning pan is circular in shape.

[0012] Preferably, the outer annular surface of the third oil-slinging pan is a conical surface.

[0013] Preferably, the third oil-slinging pan, the oil-slinging pan and the locking inner sleeve are fixedly connected by oil-slinging pan bolts.

[0014] Preferably, the left bearing is a single-row cylindrical roller bearing, and the right bearing is a spherical roller bearing.

[0015] Preferably, there are multiple sealing rings between the sealing bushing and the sealing seat.

[0016] The beneficial effect of the present invention is that the original two oil-slinging plates rotate together with the active impeller shaft and the driven impeller shaft in the auxiliary oil tank respectively, and can play the role of splashing oil bath lubrication of the lubricating oil in the auxiliary oil tank; the third oil-slinging plate and the oil-slinging plate on the active impeller shaft are fixed by the connection of the oil-slinging plate bolts, and the third oil-slinging plate and the oil-slinging plate on the active impeller shaft rotate together to play the role of splashing lubrication; after adding a third oil-slinging plate, the oil bath is more sufficient and the lubrication effect is better; the outer annular surface of the third oil-slinging plate adopts a conical surface design, and a small conical gas surface is formed under high-speed rotation, so that the lubricating oil splashed close to the skeleton oil seal is blocked by the formed conical gas surface, effectively avoiding contact with the skeleton oil seal, thereby increasing the service life of the skeleton oil seal and reducing the risk of oil leakage from the skeleton oil seal.

[0017] In order to make efficient use of the newly added third oil-slinging pan, the present invention adopts a coaxial bolt connection method with the original oil-slinging pan, making the connection and fixation more stable; the use of oil-slinging pan bolts to connect to the original oil-slinging pan avoids the risks of separate connection and better cooperates with the original oil-slinging pan; at the same time, this connection and fixation method is suitable for upgrading and modifying existing double-oil-slinging pan Roots blowers, and the modification is convenient and low-cost. Therefore, the three-oil-slinging pan Roots blower of the present invention can meet the use of industries with high environmental protection requirements for gas transmission, has good oil leakage prevention effect, increases the service life of the skeleton oil seal, and meets the requirements of low improvement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 yes Figure 1 An enlarged schematic diagram of the left half of ;

[0020] Figure 3 yes Figure 1 An enlarged schematic diagram of the right half of ;

[0021] Figure 4 It is a schematic diagram of the oil-slinging pan structure;

[0022] Figure 5 yes Figure 4 sectional view of

[0023] Figure 6 It is a structural diagram of the third oil-slinging pan;

[0024] Figure 7 yes Figure 6 Right view of .

[0025] Explanation of symbols in the figure:

[0026] 1. Auxiliary oil tank; 2. Oil-slinging pan; 3. Left bearing; 4. Locking inner sleeve; 5. Active impeller shaft; 6. Oil seal sleeve; 7. Skeleton oil seal; 8. Oil-slinging pan bolts; 9. Third oil-slinging pan; 10. Wall panel; 11. Casing; 12. Seal seat; 13. Bearing gland; 14. Gland bolts; 15. Main oil tank; 16. Expansion sleeve; 17. Oil deflector; 18. Active gear; 19. Driven gear; 20. Sealing bushing; 21. O-ring; 22. Driven impeller shaft; 23. Gear washer; 24. Right bearing; 25. Sealing ring; 26. Right wall panel. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the embodiments.

[0028] Figure 1-Figure 7 This is an embodiment of a three-oil-spinning Roots blower of the present invention, which includes a casing 11, a left wall panel 10, a right wall panel 26, an auxiliary oil tank 1 and a main oil tank 15. The left wall panel 10 is fixedly connected to the left end of the casing 11, the auxiliary oil tank 1 is fixedly connected to the left wall panel 10, the right wall panel 26 is fixedly connected to the right end of the casing 11, and the main oil tank 15 is fixedly connected to the right wall panel 26. An active impeller shaft 5 and a driven impeller shaft 22 are installed inside a working chamber formed by the casing 11, the left wall panel 10 and the right wall panel 26. An active impeller is installed on the active impeller shaft 5, and a driven impeller is installed on the driven impeller shaft 22.

[0029] The left end of the active impeller shaft 5 passes through the auxiliary oil tank 1, and a left bearing 3 is provided between the left end of the active impeller shaft 5 and the left wall panel 10. The active impeller shaft 5 is rotatably connected to the left wall panel 10 through the left bearing 3. A sealing seat 12 is provided on the right side of the left bearing 3, and an oil baffle 17 and a sealing sleeve 20 are provided inside the sealing seat 12. An O-ring 21 is provided between the sealing sleeve 20 and the active impeller shaft 5, and a sealing ring 25 is provided between the sealing sleeve 20 and the sealing seat 12. There are multiple sealing rings 25, and a locking inner sleeve 4 is provided on the left side of the left bearing 3. The locking inner sleeve 4 is fixedly connected to the active impeller shaft 5, and an oil throwing pan 2 is installed on the locking inner sleeve 4. A third oil throwing pan 9 is installed on the left side of the oil throwing pan 2, and the third oil throwing pan 9, the oil throwing pan 2 and the locking inner sleeve 4 are fixedly connected by oil throwing pan bolts 8.

[0030] An oil seal sleeve 6 is provided between the left end of the active impeller shaft 5 and the auxiliary oil tank 1 , a sealing ring is provided between the oil seal sleeve 6 and the active impeller shaft 5 , and a skeleton oil seal 7 is provided between the oil seal sleeve 6 and the auxiliary oil tank 1 .

[0031] A right bearing 24 is provided between the right end of the active impeller shaft 5 and the right wall panel 26. The active impeller shaft 5 is rotatably connected to the right wall panel 26 through the right bearing 24. A sealing seat 12 is provided on the left side of the right bearing 24. An oil baffle 17 and a sealing bushing 20 are provided inside the sealing seat 12. An O-ring 21 is provided between the sealing bushing 20 and the active impeller shaft 5. A sealing ring 25 is provided between the sealing bushing 20 and the sealing seat 12. There are multiple sealing rings 25. A bearing pressure cover 13 is provided on the right side of the right bearing 24. The bearing pressure cover 13 is fixedly connected to the right wall panel 26 by a pressure cover bolt 14. A driving gear 18 is provided on the right side of the bearing pressure cover 13. A gear washer 23 is provided between the driving gear 18 and the bearing pressure cover 13. A tightening sleeve 16 is provided at the right end of the driving gear 18.

[0032] The left end of the driven impeller shaft 22 is connected to the left wall panel 10 in the same manner as the left end of the driving impeller shaft 5 is connected to the left wall panel 10. A left bearing 3 is provided between the left end of the driven impeller shaft 22 and the left wall panel 10. The driven impeller shaft 22 is rotatably connected to the left wall panel 10 via the left bearing 3. A sealing seat 12 is provided on the right side of the left bearing 3. An oil deflector 17 and a sealing bushing 20 are provided inside the sealing seat 12. An O-ring 21 is provided between the sealing bushing 20 and the driven impeller shaft 22. A sealing ring 25 is provided between the sealing bushing 20 and the sealing seat 12. There are multiple sealing rings 25. A locking inner sleeve 4 is provided on the left side of the left bearing 3. The locking inner sleeve 4 is fixedly connected to the driving impeller shaft 5. The oil slinger 2 is mounted on the locking inner sleeve 4.

[0033] The connection method between the right end of the driven impeller shaft 22 and the right wall plate 26 is the same as the connection method between the right end of the driving impeller shaft 5 and the right wall plate 26. A right bearing 24 is provided between the right end of the driven impeller shaft 22 and the right wall plate 26. The driven impeller shaft 22 is rotatably connected to the right wall plate 26 through the right bearing 24. A sealing seat 12 is provided on the left side of the right bearing 24. An oil deflector 17 and a sealing bushing 20 are provided inside the sealing seat 12. An O-ring 21 is provided between the sealing bushing 20 and the driven impeller shaft 22. A sealing ring 25 is provided between the sealing bushing 20 and the sealing seat 12. There are multiple sealing rings 25. A bearing gland 13 is provided on the right side of the right bearing 24. The bearing gland 13 is fixedly connected to the right wall plate 26 by gland bolts 14. A driven gear 19 is provided on the right side of the bearing gland 13. A gear washer 23 is provided between the driven gear 19 and the bearing gland 13. A expansion sleeve 16 is provided on the right end of the driven gear 19.

[0034] The left wall panel 10 and the right wall panel 26 use an expansion ring seal through the sealing seat 12, the sealing bushing 20 and the sealing ring 25 to prevent gas leakage; at the same time, the lubricating oil is sealed under the joint action of the O-ring 21 and the oil baffle 17.

[0035] In one specific embodiment, the left bearing 3 is a single-row cylindrical roller bearing, and the right bearing 24 is a spherical roller bearing. The driving impeller shaft 5 and the driven impeller shaft 22 are mounted within the working chamber formed by the housing 11, the left wall panel 10, and the right wall panel 26. The driving impeller shaft 5 is mounted on the driving impeller shaft, and the driven impeller shaft 22 is mounted on the driven impeller shaft. The driving impeller shaft 5 and the driven impeller shaft 22 are connected by a driving gear 18 and a driven gear 19 disposed within the main oil tank 15. The left wall panel 10 cooperates with the single-row cylindrical roller bearing, and the right wall panel 26 cooperates with the spherical roller bearing, forming a reliable support structure for the driving impeller shaft 5 and the driven impeller shaft 22. The spherical roller bearings are axially fixed by the bearing gland 13 connected by gland bolts 14.

[0036] In a specific embodiment, the third oil-slinging plate 9 is circular in shape, and the outer annular surface of the third oil-slinging plate 9 is a conical surface. The two oil-slinging plates 2 rotate together with the active impeller shaft 5 and the driven impeller shaft 22 in the auxiliary oil tank 1, respectively, to play the role of splashing oil bath lubrication in the auxiliary oil tank. The third oil-slinging plate 9 is fixed to the oil-slinging plate 2 on the active impeller shaft 5 by the connection of the M8 oil-slinging plate bolt 8. The third oil-slinging plate 9 rotates together with the oil-slinging plate 2 on the active impeller shaft 5 to play the role of splashing lubrication. After adding a third oil-slinging plate 9, the oil bath is more sufficient and the lubrication effect is better. The outer annular surface of the third oil-slinging plate 9 adopts a conical surface design, which forms a small conical gas surface under high-speed rotation. The lubricating oil splashed near the skeleton oil seal 7 is blocked by the formed conical gas surface, effectively avoiding contact with the skeleton oil seal 7, thereby increasing the service life of the skeleton oil seal 7 and reducing the risk of oil leakage from the skeleton oil seal 7.

[0037] In order to make the newly added third oil-slinging plate 9 be used efficiently, the present invention adopts a method of connecting with the original oil-slinging plate 2 by coaxial bolts, so that the connection and fixation are more stable. The oil-slinging plate bolts 8 are used to connect with the original oil-slinging plate 2, which avoids the risk of a separate connection and is better used in conjunction with the original oil-slinging plate 2. At the same time, this connection and fixation method is suitable for upgrading and modifying the existing double-oil-slinging plate Roots blower, and the modification is convenient and low-cost. Therefore, the three-oil-slinging plate Roots blower of the present invention can meet the use of industries with high environmental protection requirements for gas transmission, has good oil leakage prevention effect, increases the service life of the skeleton oil seal, and meets the requirements of low improvement cost.

[0038] However, the above description is merely a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A three-oil-spinning Roots blower, comprising a casing, a left wall panel, a right wall panel, an auxiliary oil tank, and a main oil tank, wherein a driving impeller shaft and a driven impeller shaft are installed inside a working chamber formed by the casing, the left wall panel, and the right wall panel, wherein: The left end of the active impeller shaft passes through the auxiliary oil tank, and a left bearing is provided between the left end of the active impeller shaft and the left wall plate. The active impeller shaft is rotatably connected to the left wall plate through the left bearing. A sealing seat is provided on the right side of the left bearing, and an oil deflector and a sealing bushing are provided inside the sealing seat. An O-ring is provided between the sealing bushing and the active impeller shaft, and a sealing ring is provided between the sealing bushing and the sealing seat. A locking inner sleeve is provided on the left side of the left bearing, and the locking inner sleeve is fixedly connected to the active impeller shaft. An oil throwing pan is installed on the locking inner sleeve, and a third oil throwing pan is installed on the left side of the oil throwing pan. An oil seal sleeve is provided between the left end of the active impeller shaft and the auxiliary oil tank, a sealing ring is provided between the oil seal sleeve and the active impeller shaft, and a skeleton oil seal is provided between the oil seal sleeve and the auxiliary oil tank; A right bearing is provided between the right end of the active impeller shaft and the right wall plate, the active impeller shaft is rotatably connected to the right wall plate through the right bearing, a sealing seat is provided on the left side of the right bearing, an oil baffle and a sealing bushing are provided inside the sealing seat, an O-ring is provided between the sealing bushing and the active impeller shaft, a sealing ring is provided between the sealing bushing and the sealing seat, a bearing gland is provided on the right side of the right bearing, the bearing gland is fixedly connected to the right wall plate by gland bolts, a driving gear is provided on the right side of the bearing gland, a gear washer is provided between the driving gear and the bearing gland, and a expansion sleeve is provided on the right end of the driving gear; A left bearing is provided between the left end of the driven impeller shaft and the left wall plate, the driven impeller shaft is rotatably connected to the left wall plate through the left bearing, a sealing seat is provided on the right side of the left bearing, an oil baffle and a sealing bushing are provided inside the sealing seat, an O-ring is provided between the sealing bushing and the driven impeller shaft, a sealing ring is provided between the sealing bushing and the sealing seat, a locking inner sleeve is provided on the left side of the left bearing, the locking inner sleeve is fixedly connected to the active impeller shaft, and an oil slingering pan is installed on the locking inner sleeve; A right bearing is provided between the right end of the driven impeller shaft and the right wall plate, and the driven impeller shaft is rotatably connected to the right wall plate through the right bearing, a sealing seat is provided on the left side of the right bearing, an oil baffle and a sealing bushing are provided inside the sealing seat, an O-ring is provided between the sealing bushing and the driven impeller shaft, a sealing ring is provided between the sealing bushing and the sealing seat, a bearing gland is provided on the right side of the right bearing, the bearing gland is fixedly connected to the right wall plate by gland bolts, a driven gear is provided on the right side of the bearing gland, a gear washer is provided between the driven gear and the bearing gland, and a expansion sleeve is provided at the right end of the driven gear; The third oil-spinning pan is circular in shape; The outer annular surface of the third oil-slinging plate is a conical surface. When the active impeller shaft rotates at high speed, a conical gas surface is formed between the oil-slinging plate and the third oil-slinging plate. The conical gas surface effectively blocks the lubricating oil near the side of the skeleton oil seal, preventing the lubricating oil from leaking outward through the skeleton oil seal. The third oil-slinging pan, the oil-slinging pan and the locking inner sleeve are fixedly connected by oil-slinging pan bolts.

2. The three-oil-spinning Roots blower according to claim 1, characterized in that: The left bearing is a single-row cylindrical roller bearing, and the right bearing is a spherical roller bearing.

3. A three-oil-spinning Roots blower according to any one of claims 1 or 2, characterized in that: There are multiple sealing rings between the sealing bushing and the sealing seat.

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