Double-oil tank roots vacuum pump

Abstract

The application provides a double-oil-tank Roots vacuum pump, which comprises a motor, a pump shell and rotors, center shafts one and two are arranged in the middle of the two rotors, a first oil tank, a control tank and a second oil tank are sequentially arranged at the side end of the pump shell, oil inlets and oil outlets are arranged on the first oil tank and the second oil tank, first gear sets and second gear sets are arranged in the first oil tank and the second oil tank respectively, first clutch assemblies are arranged between the first gear sets and the center shafts one and two, second clutch assemblies are arranged between the second gear sets and the center shafts one and two, the first clutch assemblies and the second clutch assemblies are used for controlling the on-off of the first gear sets and the second gear sets and the center shafts one and two, and the production efficiency is ensured without stopping and oiling.

Description

TECHNICAL FIELD

[0001] The present application relates to Roots vacuum pumps, in particular, to a double-oil-tank Roots vacuum pump. BACKGROUND

[0002] Roots vacuum pump refers to a variable volume vacuum pump with two counter-rotating lobed rotors inside the pump, and the rotors and the inner wall of the pump shell have small gaps and do not contact each other.

[0003] In some production lines in the chemical industry, some Roots vacuum pumps are needed for vacuumizing treatment. Such Roots vacuum pumps need to work for a long time, but the lubricating oil in the gear box needs to be replaced after the Roots vacuum pump works for a period of time, and the gear box needs to be cleaned to remove the oil sludge in the gear box to ensure the service life of the gear. However, the Roots vacuum pump needs to be stopped during the replacement of the lubricating oil and the cleaning of the gear box, otherwise the gear wear will be aggravated during the replacement and cleaning process. The whole production line needs to stop working after the Roots vacuum pump is stopped. SUMMARY

[0004] Therefore, the present application aims to provide a double-oil-tank Roots vacuum pump with the function of amplifying torque for smooth starting of the pump body.

[0005] In order to solve the above technical problems, the technical scheme of the present application is as follows: a double-oil-tank Roots vacuum pump, comprising a motor, a pump shell and a pair of rotors arranged in the pump shell, a center shaft one and a center shaft two are arranged between the two rotors, a first oil tank, a control box and a second oil tank are sequentially arranged at the side end of the pump shell, an oil inlet and an oil outlet are arranged on the first oil tank and the second oil tank, a first gear set and a second gear set are arranged in the first oil tank and the second oil tank respectively, a first clutch assembly is arranged between the first gear set and the center shaft one and the center shaft two, a second clutch assembly is arranged between the second gear set and the center shaft one and the center shaft two, the first clutch assembly and the second clutch assembly are respectively used to control the on-off of the first gear set and the second gear set with the center shaft one and the center shaft two, and a control assembly for controlling the clutch of the first clutch assembly and the second clutch assembly is arranged in the control box.

[0006] Through the above technical means, two oil tanks are arranged, and gear sets are arranged in both oil tanks, so that the clutch assembly is used to control the coaxial rotation of the center shaft and one pair of gears. When oil replacement is needed, the gears in one oil tank are engaged, and the gears in the other oil tank do not rotate, so that the production efficiency is ensured without stopping, and the service life of the pump is increased to a certain extent.

[0007] Preferably, the first oil tank is provided with a gear mounting frame one, the second oil tank is provided with a gear mounting frame two, the gear mounting frame two is provided with a center rod, the second gear set is arranged on the center rod, the gear mounting frame one is provided with a mounting ring, and the first gear set is arranged on the mounting ring.

[0008] Through the above technical means, the gear mounting frame one and the gear mounting frame two are arranged, so that the gear is not in contact with the center shaft while the installation of the gear is ensured.

[0009] Preferably, the first clutch assembly and the second clutch assembly are the same structure, the first clutch assembly comprises a resisting ring and a driven ring, the resisting ring is arranged on the center shaft one and the center shaft two in a sliding mode, a key is arranged between the resisting ring and the center shaft one and the center shaft two, the driven ring is fixedly arranged at the side end of the first gear set and the second gear set, and the control assembly controls the resisting ring to move towards the first gear set and the second gear set.

[0010] Through the above technical means, the center shaft one and the center shaft two drive the gear to rotate when the resisting ring and the driven ring are in contact through the cooperation between the resisting ring and the driven ring.

[0011] Preferably, the clutch assembly further comprises a pre-pressing ring, the pre-pressing ring is made of brass, the pre-pressing ring rotates with the resisting ring, the side end of the driven ring is provided with a mounting ring, the pre-pressing ring is arranged on the mounting ring in a sliding mode, the side end of the pre-pressing ring and the side end of the driven ring are both provided with an inclined surface one, a pressure spring is further arranged between the pre-pressing ring and the resisting ring, when the resisting ring approaches the driven ring, the pre-pressing ring first abuts against the driven ring through the inclined surface one, and the clutch assembly further comprises a toothed part.

[0012] Through the above technical means, the pre-pressing ring made of brass is arranged, so that the direct contact between the driven ring and the resisting ring is reduced, and the service life of the resisting ring and the driven ring is ensured.

[0013] Preferably, the toothed part comprises a tooth ring arranged on the resisting ring, the tooth ring is provided with internal teeth, the driven ring is provided with external teeth one, the pre-pressing ring is provided with external teeth two, the internal teeth are clamped into the external teeth two, the internal teeth gradually extend into the external teeth one after the resisting ring approaches the pre-pressing ring, the pre-pressing ring is further provided with a tooth groove, the external teeth two are arranged in the tooth groove, a compression spring is further arranged between the bottom surface of the tooth groove and the external teeth two, the top surface of the external teeth two and the outside of the internal teeth are both arranged in an inclined mode, and the external teeth one and the front end of the internal teeth are both provided with an inclined surface two.

[0014] Through the technical means, the gear ring, the outer tooth one and the outer tooth two are arranged, the driven ring is rotated by the pre-pressing ring, the driven ring starts to rotate with the gear ring when the gear ring is not matched with the outer tooth one, the gear ring can be matched with the outer tooth one more easily in the movement of the driven ring, the impact force between the outer tooth one and the gear ring is reduced, and the meshing is easier through the arrangement of the inclined abutting surface two.

[0015] Preferably, the control assembly comprises a pushing plate one, a pushing plate two, a rotating rod and a handle, the pushing plate one and the pushing plate two are slidably arranged on the central shaft one and the central shaft two, the pushing plate one is used for driving the first clutch assembly to move, the pushing plate two is used for driving the second clutch assembly to move, the inner side of the pushing plate one and the inner side of the pushing plate two are provided with protrusions, the protrusions abut against the rotating rod, the rotating rod is provided with a stroke groove, the protrusions abut against the surface of the rotating rod, the rotating rod penetrates through the pump shell and is exposed to the pump shell, and the handle is installed at the end of the rotating rod.

[0016] Through the technical means, the rotating rod is rotated through the handle, the protrusions are rotated on the rotating rod, the pushing plate one and the pushing plate two are driven to move through the groove arranged on the rotating rod, the clutch function is realized, the handle is arranged, the force arm is increased, and the rotation of the rotating rod is easier.

[0017] Preferably, the control assembly further comprises a large gear, a small gear and a limiting block, the small gear is fixedly arranged on the rotating rod, the large gear is arranged at the side end of the small gear and is meshed with the small gear, and the handle is fixedly arranged on the large gear and drives the large gear to rotate.

[0018] Through the technical means, the small gear is rotated through the large gear, and the rotation of the rotating rod is easier. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of an embodiment;

[0020] Figure 2 It is an internal schematic view of an embodiment;

[0021] Figure 3 It is Figure 2 A-A sectional view of the embodiment;

[0022] Figure 4 It is a sectional view of an embodiment;

[0023] Figure 5 It is Figure 4 A partial sectional view of the embodiment;

[0024] Figure 6 It is a structural schematic view of the first clutch assembly;

[0025] Figure 7 It is Figure 6Schematic diagram of Part B;

[0026] Figure 8 This is a schematic diagram of the handle.

[0027] Reference numerals: 1. Motor; 2. Pump casing; 3. Rotor; 4. Central shaft one; 5. Central shaft two; 6. First oil tank; 7. Second oil tank; 8. Control box; 9. Oil inlet; 10. Oil outlet; 11. First gear set; 12. Second gear set; 13. First clutch assembly; 14. Second clutch assembly; 15. Control assembly; 16. Gear mounting bracket one; 17. Gear mounting bracket two; 18. Central rod; 19. Mounting collar; 20. Abutment ring; 21. From 21. Moving ring; 22. Preload ring; 23. Gear clip; 24. Mounting ring; 25. Inclined abutment surface one; 26. Pressure spring; 27. Gear ring; 28. Internal gear; 29. ​​External gear one; 30. External gear two; 31. Gear groove; 32. Compression spring; 33. Inclined abutment surface two; 34. Pusher plate one; 35. Pusher plate two; 36. Rotating rod; 37. Handle; 38. Sealing ring; 39. Return spring; 40. Protrusion; 41. Stroke groove; 42. Large gear; 43. Small gear. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered.

[0029] The utility model provides a kind of double-oil tank roots vacuum pump, including motor 1, pump shell 2 and the pair of rotors 3 being arranged in pump shell 2, rotor 3 is leaf-shaped, and the hole for reducing weight is set in the center of rotor 3, and center shaft one 4 and center shaft two 5 are respectively arranged in the middle of two rotors 3, the spindle of motor 1 is fixed between center shaft one 4, and pump shell 2 side end is sequentially provided with first oil tank 6, control box 8 and second oil tank 7, and the oil inlet 9 and oil discharge port 10 are provided on first oil tank 6 and second oil tank 7, first gear set 11 and second gear set 12 are respectively provided in first oil tank 6 and second oil tank 7, first clutch assembly 13 is provided between first gear set 11 and center shaft one 4, center shaft two 5, second clutch assembly 14 is provided between second gear set 12 and center shaft one 4, center shaft two 5, and first clutch assembly 13 and second clutch assembly 14 are respectively used to control the on-off of first gear set 11, second gear set 12 and center shaft one 4, center shaft two 5, first gear set 11 and second gear set 12 are both composed of two mutually meshing gears, to control the rotation of two rotors 3, control box 8 is provided with control assembly 15 for controlling the clutching of first clutch assembly 13 and second clutch assembly 14, when oil change is needed, the coaxial rotation of first gear set 11 and center shaft one 4, center shaft two 5 is controlled by first clutch assembly 13, i.e. the lubricating oil in second oil tank 7 can be replaced, and vice versa, the coaxial rotation of second gear set and center shaft one 4, center shaft two 5 is controlled by second clutch assembly 14, i.e. the lubricating oil in first oil tank 6 can be replaced, and replacement of lubricating oil does not need to stop, to ensure production efficiency.

[0030] Gear mounting rack one 16 is provided in first oil tank 6, gear mounting rack two 17 is provided in second oil tank 7, center rod 18 is provided on gear mounting rack two 17, second gear set 12 is arranged on center rod 18, mounting sleeve ring 19 is provided on gear mounting rack one 16, first gear set 11 is arranged on mounting sleeve ring 19, by setting gear rack one and gear rack two, the installation of gear is ensured while gear does not contact with center shaft.

[0031] First clutch assembly 13 and second clutch assembly 14 are same in structure, first clutch assembly 13 includes abutment ring 20 and driven ring 21, abutment ring 20 is slidably arranged on center shaft one 4 and center shaft two 5, and flat key is arranged between abutment ring 20 and center shaft one 4, center shaft two 5, to ensure the coaxial rotation of abutment ring 20 and center shaft one 4, center shaft two 5, driven ring 21 is fixedly arranged on the side end of single gear of first gear set 11, second gear set 12 and integrally formed, control assembly 15 controls abutment ring 20 to move towards first gear set 11, second gear set 12.

[0032] The clutch assembly further comprises a pre-pressing ring 22 and a clamping tooth 23, the pre-pressing ring 22 is made of brass, the pre-pressing ring 22 rotates with the abutting ring 20 through the clamping tooth 23, the driven ring 21 is provided with a mounting ring 24 at the side end, the pre-pressing ring 22 is sleeved on the mounting ring 24, the side end of the pre-pressing ring 22 and the side end of the driven ring 21 are both provided with an inclined abutting surface 25, the pre-pressing ring 22 and the abutting ring 20 are both provided with a pressure spring 26, when the abutting ring 20 approaches the driven ring 21, the pressure spring 26 abuts against the pre-pressing ring 22 and moves, and first abuts against the driven ring 21 through the inclined abutting surface 25, so that the driven ring 21 is pre-rotated.

[0033] The clamping tooth 23 comprises a tooth ring 27 provided on the abutting ring 20, the tooth ring 27 is provided with an inner tooth 28, the driven ring 21 is provided with an outer tooth 29, the pre-pressing ring 22 is provided with an outer tooth 30, the inner tooth 28 is clamped into the outer tooth 30, so as to ensure that the pre-pressing ring 22 rotates with the abutting ring 20, when the abutting ring 20 gradually approaches the pre-pressing ring 22, the inner tooth 28 gradually extends into the outer tooth 29 from the outer tooth 30, during which the pre-pressing ring 22 presses the driven ring 21, so that the driven ring 21 rotates with the pre-pressing ring 22 and the rotating speed gradually becomes consistent, the pre-pressing ring 22 is further provided with a tooth groove 31, the outer tooth 30 is arranged in the tooth groove 31, the tooth groove 31 is further provided with a compression spring 32 between the bottom surface and the top surface of the outer tooth 30, the outer side of the inner tooth 28 and the top surface of the outer tooth 30 are both inclined, when the inner tooth 28 moves towards the outer tooth 29, the outer tooth 30 gradually retracts into the tooth groove 31, and provides a certain pressure for the pre-pressing ring 22 abutting against the driven ring 21, the outer tooth 29 and the inner tooth 28 are both provided with an inclined abutting surface 33, through the inclined abutting surface 33, the end surfaces of the outer tooth 29 and the inner tooth 28 are in a sharp angle state, so as to facilitate engagement, through the tooth ring 27, the outer tooth 29 and the outer tooth 30, the function of the pre-pressing ring 22 pre-driving the driven ring 21 to rotate is utilized, so that the driven ring 21 starts to rotate with the driven ring 21 when the tooth ring 27 does not cooperate with the outer tooth 29, and the tooth ring 27 can be more easily cooperated with the outer tooth 29 during the transverse movement of the abutting ring 20, and the impact force between the outer tooth 29 and the tooth ring 27 during engagement is reduced.

[0034] The control assembly 15 comprises a pushing plate 1 34, a pushing plate 2 35, a rotating rod 36 and a handle 37. The pushing plate 1 34 and the pushing plate 2 35 are both slidingly arranged on the central shaft 1 4 and the central shaft 2 5. The pushing plate 1 34 and the pushing plate 2 35 are provided with a sealing ring 38 between the pushing plate 1 34 and the pushing plate 2 35 and the partition of the control box 8. The sealing ring 38 is preferably a sliding mechanical seal, which can reduce the oil entering the control box 8. The pushing plate 1 34 is used to drive the first clutch assembly 1 3 to move. The pushing plate 2 35 is used to drive the second clutch assembly 1 4 to move. The pushing plate 1 34 and the pushing plate 2 35 are further provided with a return spring 39 between the pushing plate 1 34 and the pushing plate 2 35 and the inner wall of the control box 8. The inner side of the pushing plate 1 34 and the pushing plate 2 35 is provided with a lug 40, which abuts against the rotating rod 36. The rotating rod 36 is provided with a stroke groove 41. When the lug 40 abuts in the stroke groove 41, the return spring 39 drives the pushing plate 1 34 or the pushing plate 2 35 to move back, so that the clutch assembly is separated from the first gear set 1 1 or the second gear set 1 2. When the lug 40 does not abut in the stroke groove 41, the return spring 39 is compressed, and the clutch assembly is tightly abutted against the first gear set 1 1 or the second gear set 1 2. The rotating rod 36 penetrates through and exposes from the pump shell 2. The handle 37 is installed at the end of the rotating rod 36. The rotating rod 36 is rotated through the handle 37, so that the lug 40 is rotated on the rotating rod 36. The pushing plate 1 34 and the pushing plate 2 35 are moved through the groove arranged on the rotating rod 36, so that the clutch function is realized. The handle 37 is arranged, so that the force arm is increased, and the rotation of the rotating rod 36 is more easily.

[0035] The control assembly 15 further comprises a large gear 42, a small gear 43 and a limiting block. The small gear 43 is fixedly arranged on the rotating rod 36. The large gear 42 is arranged at the side end of the small gear 43 and is engaged with the small gear 43. The handle 37 is fixedly arranged on the large gear 42 and drives the large gear 42 to rotate. The small gear 43 is driven to rotate through the large gear 42, so that the rotation of the rotating rod 36 is more easily.

[0036] Of course, the above is only a typical example of the present application. In addition to this, the present application can have other various specific implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A dual-tank Roots vacuum pump, comprising a motor (1), a pump housing (2), and a pair of rotors (3) disposed within the pump housing (2), wherein a central shaft one (4) and a central shaft two (5) are respectively disposed between the two rotors (3), characterized in that: The pump housing (2) is provided with a first oil tank (6), a control box (8), and a second oil tank (7) in sequence on its side. The first oil tank (6) and the second oil tank (7) are provided with an oil inlet (9) and an oil outlet (10). The first oil tank (6) and the second oil tank (7) are respectively provided with a first gear set (11) and a second gear set (12). The first gear set (11) is provided with a first clutch assembly (13) between the first gear set (11) and the first central shaft (4) and the second central shaft (5). The second gear set (12) is provided with a second clutch assembly (14) between the second central shaft (4) and the second central shaft (5). The first clutch assembly (13) and the second clutch assembly (14) are respectively used to control the opening and closing of the first gear set (11) and the second gear set (12) with the first central shaft (4) and the second central shaft (5). The control box (8) is provided with a control assembly (15) for controlling the first clutch assembly (13) and the second clutch assembly (14) to engage and disengage.

2. The dual-tank Roots vacuum pump according to claim 1, characterized in that: The first oil tank (6) is provided with a gear mounting bracket one (16), the second oil tank (7) is provided with a gear mounting bracket two (17), the gear mounting bracket two (17) is provided with a center rod (18), the second gear set (12) is provided on the center rod (18), the gear mounting bracket one (16) is provided with a mounting collar (19), and the first gear set (11) is provided on the mounting collar (19).

3. A dual-tank Roots vacuum pump according to claim 1, characterized in that: The first clutch assembly (13) and the second clutch assembly (14) have the same structure. The first clutch assembly (13) includes a stop ring (20) and a driven ring (21). The stop ring (20) is slidably disposed on the first central shaft (4) and the second central shaft (5), and a flat key is disposed between the stop ring (20) and the first central shaft (4) and the second central shaft (5). The driven ring (21) is fixedly disposed on the side end of the first gear set (11) and the second gear set (12). The control assembly (15) controls the stop ring (20) to move toward the first gear set (11) and the second gear set (12).

4. A dual-tank Roots vacuum pump according to claim 3, characterized in that: The clutch assembly also includes a preload ring (22), which is made of brass. The preload ring (22) rotates with the abutment ring (20). The driven ring (21) has a mounting ring (24) on its side. The preload ring (22) is slidably sleeved on the mounting ring (24). Both the side of the preload ring (22) and the side of the driven ring (21) are provided with a first inclined abutment surface (25). A pressure spring (26) is also provided between the preload ring (22) and the abutment ring (20). When the abutment ring (20) approaches the driven ring (21), the preload ring (22) first abuts against the driven ring (21) through the first inclined abutment surface (25). The clutch assembly also includes a locking tooth (23).

5. A dual-tank Roots vacuum pump according to claim 4, characterized in that: The toothed component (23) includes a toothed ring (27) disposed on the abutment ring (20). The toothed ring (27) has an inner tooth (28). The driven ring (21) has an outer tooth (29). The preload ring (22) has an outer tooth (30). The inner tooth (28) is engaged in the outer tooth (30). After the abutment ring (20) approaches the preload ring (22), the inner tooth (28) gradually extends into the outer tooth (29). The preload ring (22) also has a tooth groove (31). The outer tooth (30) is disposed in the tooth groove (31). A compression spring (32) is disposed between the bottom surface of the tooth groove (31) and the outer tooth (30). The outer side of the inner tooth (28) and the top surface of the outer tooth (30) are both inclined. The front ends of the outer tooth (29) and the inner tooth (28) are both provided with a sloping abutment surface (33).

6. A dual-tank Roots vacuum pump according to claim 1, characterized in that: The control component (15) includes a pusher plate one (34), a pusher plate two (35), a rotating rod (36), and a handle (37). The pusher plate one (34) and the pusher plate two (35) are slidably mounted on the central shaft one (4) and the central shaft two (5). The pusher plate one (34) is used to drive the first clutch assembly (13) to move, and the pusher plate two (35) is used to drive the second clutch assembly (14) to move. The inner sides of the pusher plate one (34) and the pusher plate two (35) are provided with protrusions (40). The protrusions (40) abut against the rotating rod (36). The rotating rod (36) has a stroke groove (41). The protrusions (40) abut against the surface of the rotating rod (36). The rotating rod (36) passes through and protrudes from the pump housing (2). The handle (37) is installed at the end of the rotating rod (36).

7. A dual-tank Roots vacuum pump according to claim 6, characterized in that: The control component (15) also includes a large gear (42), a small gear (43) and a limiting block. The small gear (43) is fixedly mounted on the rotating rod (36). The large gear (42) is mounted on the side of the small gear (43) and meshes with the small gear (43). The handle (37) is fixedly mounted on the large gear (42) and drives the large gear (42) to rotate.

Images