S-shaped fully-sealed roots pump

Abstract

The utility model discloses an S-shaped full-sealed roots pump, which comprises a pump body and a motor, a rotor assembly is rotatably connected in the pump body, an end cover for connecting the pump body and the motor is arranged at the joint of the pump body and the motor, two ends of the end cover are respectively connected with the motor and the pump body, one side of a shell of the motor is provided with a connecting part connected with the end cover, and the end cover is connected with the motor. A ring groove is formed in the side, facing the end cover, of the connecting part, an O-shaped ring matched with the ring groove is arranged at the position of the ring groove, one side of the O-shaped ring abuts against the end cover, an output shaft of the motor is connected with the rotor assembly through a coupler, and the coupler is located in the end cover. The end cover connection mode is adopted, and the coupler is located in the end cover, so that the connection position of the end cover and the motor is sealed through the O-shaped ring, the situation that oil leaks frequently at the outward-extending oil seal position of a conventional roots pump shaft is eradicated, and the sealing performance is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of Roots pumps, in particular to an S-type fully sealed Roots pump. Background Art

[0002] Roots pump, also known as Roots vacuum pump, refers to a variable displacement vacuum pump that has two leaf-shaped rotors rotating synchronously in opposite directions inside the pump, with a small gap between the rotors and between the rotors and the inner wall of the pump casing, and they do not contact each other.

[0003] After searching, the Chinese patent with announcement number CN219101579U discloses a Roots pump, including a pump body, in which rotating shaft 1 and rotating shaft 2 are rotatably installed, one end of rotating shaft 1 is connected to the motor, and the other end of rotating shaft 1 and the corresponding end of rotating shaft 2 are connected to gears through expansion sleeves, and the two gears are meshed with each other; rotors are installed on rotating shaft 1 and rotating shaft 2 located in the inner cavity; and a jacket-type water cooling mechanism for cooling the gears is also installed on the pump body. Fixing the rotating shaft and gears by expansion sleeves solves the problems of difficult processing, assembly and maintenance, and greatly improves production efficiency and product quality. The use of jacket-type cooling solves the problem of easy water leakage, improves cooling efficiency, saves materials and processing time, has a simple and beautiful appearance, and is easy to operate and maintain.

[0004] However, the output shaft of the motor is connected to the rotating shaft of the pump body through a connecting seat. In actual use, the pump shaft is prone to protruding and the oil seal is prone to oil leakage, resulting in insufficient sealing. Utility Model Content

[0005] In order to further improve the sealing performance, the present application provides an S-type fully sealed Roots pump.

[0006] The present application provides an S-type fully sealed Roots pump, which adopts the following technical solution:

[0007] An S-type fully sealed Roots pump comprises a pump body and a motor, wherein a rotor assembly is rotatably connected in the pump body, an end cover connecting the pump body and the motor is provided at the connection between the two, both ends of the end cover are respectively connected to the motor and the pump body, one side of the motor housing has a connecting portion connected to the end cover, the connecting portion has an annular groove on the side facing the end cover, an O-ring adapted thereto is provided at the annular groove, one side of the O-ring abuts against the end cover, the output shaft of the motor is connected to the rotor assembly via a coupling, and the coupling is located inside the end cover.

[0008] Optionally, the pump body is provided with an air inlet and an exhaust port, and the pump body is provided with a cover body corresponding to the air inlet and the exhaust port to seal them, the cover body is detachably connected to the pump body, and an O-ring is provided at the connection between the cover body and the pump body.

[0009] Optionally, the pump body includes a pump casing and side covers at both ends, the side covers are provided with bearings, the bearings are connected to the ends of the rotor assembly, and an oil-slinging pan is provided at the end of the coupling away from the motor.

[0010] Optionally, a cavity is formed inside the end cover, an oil storage cavity is formed at the bottom of the cavity, and an oil filling hole connected to the cavity is opened at the top of the side cover.

[0011] Optionally, a cooling water pipe is provided in the oil storage cavity, and both ends of the cooling water pipe pass through the bottom of the end cover to form a water inlet pipe and a water outlet pipe.

[0012] Optionally, the cooling water pipe is arranged horizontally and in a bent shape.

[0013] Optionally, an oil mirror for observing the oil level in the oil storage cavity is provided at the bottom of the end surface of the end cover.

[0014] Optionally, an operation opening is opened on two opposite side walls of the end cover, a detachable cover is provided at the operation opening, and the operation opening corresponds to the height position of the coupling.

[0015] Optionally, the bottom of the pump body has a base, and the base has an extension portion extending toward the motor, and the end of the extension portion is located below the motor and is provided with a mounting hole.

[0016] Optionally, the base is detachably connected to the pump body, the pump body is provided with a connecting seat connected to the base, the base includes a vertical support foot, the support foot has a hollow portion, and a screw connected to the connecting seat is arranged in the hollow portion.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. The original connection seat and sealing seat are cancelled, and the end cover connection method is adopted. The coupling is located inside the end cover, so that the connection between the end cover and the motor is sealed with an O-ring, which eliminates the frequent oil leakage at the extended oil seal of the conventional Roots pump shaft and effectively improves the sealing performance;

[0019] 2. When the Roots pump is not in use, the air inlet and outlet are sealed with the help of the O-ring on the cover, achieving a fully sealed state with better sealing performance;

[0020] 3. The oil at the bottom is pumped onto the bearings for lubrication through the rotation of the oil pan, which improves the smoothness of the rotor assembly rotation. The oil in the oil storage chamber is efficiently cooled by the cooling water pipe, so that the oil is in a good use state.

[0021] 4. The oil mirror on the end cover can accurately know the internal oil situation, so as to add oil in time. The operation port is convenient for adjusting the clearance at the coupling. When adjusting, there is no need to remove the motor and the end cover for operation, which makes the operation more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall structural diagram of an embodiment of the present application.

[0023] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 It is a schematic diagram of the internal structure of the end cover in the embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the external structure of the end cover in the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1. Motor; 2. Pump body; 4. Gearbox; 5. Air inlet; 6. Exhaust port; 7. Pump casing; 8. Side cover; 9. End cover; 10. Connection part; 11. Drive shaft; 12. Coupling; 13. Ring groove; 14. O-ring; 15. Cover body; 16. Bearing; 17. Cavity; 18. Oil storage cavity; 19. Oil throwing tray; 20. Cooling water pipe; 21. Water inlet pipe; 22. Water outlet pipe; 23. Oil mirror; 24. Oil filling hole; 25. Operation port; 26. Base; 27. Extension part; 28. Mounting hole; 29. ​​Hollow part; 30. Connecting seat; 31. Support foot. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The embodiment of the present application discloses an S-type fully sealed Roots pump.

[0031] An S-type fully sealed Roots pump, such as Figure 1 and Figure 2 As shown, it includes a motor 1 and a pump body 2. The motor 1 is connected to one end of the pump body 2. Two rotor assemblies are rotatably connected inside the pump body 2. A gear box 4 for transmitting the two is provided at the end of the rotor assembly away from the motor 1. An air inlet 5 and an exhaust port 6 are opened on the pump body 2. In actual process, the motor 1 drives the rotor assembly to rotate, and the gas enters from the air inlet 5 and is finally discharged from the exhaust port 6.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, the motor 1 adopts a sealed water-cooled motor, the pump body 2 includes a pump casing 7 and side covers 8 at both ends, the side cover 8 and the pump body 2 are detachably connected by screws, an end cover 9 connecting the two is arranged between the motor 1 and the side cover 8, one side of the end cover 9 is fixed to the side cover 8 by screws, the motor 1 has a connecting portion 10 connected to the end cover 9, the connecting portion 10 can specifically be a flange, connected to the end cover 9 through the flange and fixed by bolts, one of the rotor assemblies has a driving shaft 11, the driving shaft 11 extends into the end cover 9 and is connected to the output shaft of the motor 1 by means of a coupling 12 to realize power transmission, and the coupling 12 is located inside the end cover 9.

[0033] like Figure 2 and Figure 3 As shown, an annular groove 13 is provided on one side of the connecting portion 10 facing the end cover 9, and an O-ring 14 is arranged in the annular groove 13. One side of the O-ring 14 is pressed against the end cover 9 to achieve good sealing at the connection. In this way, the connecting seat and the sealing seat of the traditional Roots pump are eliminated, and the end cover 9 is connected and the coupling 12 is located inside the end cover 9, so that the connection between the end cover 9 and the motor 1 is sealed with the O-ring 14, which eliminates the frequent oil leakage at the extended oil seal of the conventional Roots pump shaft, and effectively improves the sealing performance.

[0034] like Figure 1 As shown, a cover body 15 for sealing the air inlet 5 and the air outlet 6 of the pump housing 7 is provided, and the cover body 15 is detachably connected to the pump housing 7 by screws, and an annular groove 13 and an O-ring 14 are also provided on the side of the cover body 15 facing the pump housing 7. The O-ring 14 is used to seal the connection between the cover body 15 and the pump housing 7. In this way, when the Roots pump is not in use, the cover body 15 can be used to seal the air inlet 5 and the air outlet 6 to achieve a fully sealed state, have better sealing performance, and reduce the situation where external impurities enter the interior.

[0035] like Figure 1-Figure 2 As shown, the side cover 8 is provided with a bearing 16 for connecting with the end of the rotor assembly. The end of the rotor assembly is supported by the bearing 16 to ensure stable and smooth rotation of the rotor assembly. The end of the end cover 9 is hollow and forms a cavity 17. The bottom of the cavity 17 serves as an oil storage chamber 18. An oil-slinging pan 19 is provided at the end of the coupling 12 away from the motor 1. The bottom of the oil-slinging pan 19 is located in the oil storage chamber 18. In this way, during actual use, the oil-slinging pan 19 will throw the oil in the oil storage chamber 18 onto the bearing 16, which can lubricate and cool it, avoid the situation where the bearing 16 is overheated and easily damaged during operation, and ensure that the bearing 16 is in good working condition.

[0036] like Figure 2 and Figure 4As shown, a cooling water pipe 20 is provided inside the end cover 9 at a position corresponding to the oil storage chamber 18. The cooling water pipe 20 is completely arranged horizontally. Both ends of the cooling water pipe 20 pass through the bottom of the end cover 9 to form an inlet pipe 21 and an outlet pipe 22. In actual use, cooling water enters from the inlet pipe 21, flows through the cooling water pipe 20 to cool the oil in the oil storage chamber 18, and is then discharged from the outlet pipe 22, thereby achieving good cooling of the oil in the oil storage chamber 18 and effectively reducing the temperature of the oil.

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, an oil mirror 23 is provided at the bottom of the end surface of the end cover 9 at a position corresponding to the oil storage cavity 18. The oil mirror 23 can be used to accurately observe the oil level in the internal oil storage cavity 18, and the staff can promptly know whether the internal oil is sufficient. In addition, an oil filling hole 24 connected to the cavity 17 is provided on the top of the side cover 8. When the internal oil is insufficient, it can be added in time through the oil filling hole 24 to ensure that the internal oil is always in a sufficient use state.

[0038] like Figure 2 and Figure 5 As shown, an operation port 25 is provided on two opposite side walls of the end cover 9, and a detachable cover is provided at the operation port 25, which can be detached by plugging or snapping. The height position of the operation port 25 is consistent with the internal coupling 12, so when it is necessary to fine-tune the clearance of the coupling 12, a screwdriver can be inserted into the operation port 25 to fine-tune the coupling 12, without removing the motor 1 and the end cover 9, and the operation is more convenient and quick.

[0039] like Figure 1 As shown, at the bottom of the pump body 2, there is a base 26 detachably connected thereto, and the base 26 has an extension portion 27 extending toward the direction of the motor 1. The end of the extension portion 27 is located below the motor 1 and is provided with a mounting hole 28. The provision of the extension portion 27 can effectively improve the overall stability of the Roots pump after the base 26 is installed, and avoid the situation where the motor 1 is heavier on one side and causes instability; the pump body 2 is provided with a connecting seat 30 connected to the base 26, the base 26 includes a vertical support leg 31 for connecting to the connecting seat 30, and the support leg 31 has a hollow portion 29, and a screw connected to the connecting portion 10 is provided in the hollow portion 29, and the screw is located in the hollow portion 29. The provision of the hollow portion 29 can reduce the overall weight of the base 26 on the one hand, and the screw is located in the hollow portion 29 to play a certain concealing role, so that the external integrity of the Roots pump is better.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An S-type fully sealed Roots pump, comprising a pump body (2) and a motor (1), wherein a rotor assembly is rotatably connected inside the pump body (2), characterized in that: An end cover (9) is provided at the connection between the pump body (2) and the motor (1) to connect the two. The two ends of the end cover (9) are respectively connected to the motor (1) and the pump body (2). One side of the housing of the motor (1) has a connecting portion (10) connected to the end cover (9). The connecting portion (10) has an annular groove (13) on the side facing the end cover (9). An O-ring (14) adapted to the annular groove (13) is provided. One side of the O-ring (14) abuts against the end cover (9). The output shaft of the motor (1) is connected to the rotor assembly via a coupling (12). The coupling (12) is located inside the end cover (9).

2. The S-type fully sealed Roots pump according to claim 1, characterized in that: The pump body (2) is provided with an air inlet (5) and an air outlet (6); the pump body (2) is provided with a cover body (15) corresponding to the air inlet (5) and the air outlet (6) for sealing the same; the cover body (15) and the pump body (2) are detachably connected; an O-ring (14) is provided at the connection between the cover body (15) and the pump body (2).

3. The S-type fully sealed Roots pump according to claim 1, characterized in that: The pump body (2) comprises a pump casing (7) and side covers (8) at both ends, the side covers (8) are provided with bearings (16), the bearings (16) are connected to the ends of the rotor assembly, and an oil-slinging pan (19) is provided at one end of the coupling (12) away from the motor (1).

4. The S-type fully sealed Roots pump according to claim 3, characterized in that: A cavity (17) is formed inside the end cover (9), an oil storage cavity (18) is formed at the bottom of the cavity (17), and an oil injection hole (24) communicating with the cavity (17) is formed at the top of the side cover (8).

5. The S-type fully sealed Roots pump according to claim 4, characterized in that: A cooling water pipe (20) is arranged in the oil storage cavity (18), and two ends of the cooling water pipe (20) pass through the bottom of the end cover (9) to form a water inlet pipe (21) and a water outlet pipe (22).

6. The S-type fully sealed Roots pump according to claim 5, characterized in that: The cooling water pipe (20) is arranged horizontally and in a bent shape.

7. The S-type fully sealed Roots pump according to claim 4, characterized in that: An oil mirror (23) for observing the oil level in the oil storage cavity (18) is provided at the bottom of the end surface of the end cover (9).

8. The S-type fully sealed Roots pump according to claim 1, characterized in that: An operating port (25) is provided on two opposite side walls of the end cover (9), a detachable cover is provided at the operating port (25), and the operating port (25) corresponds to the height position of the coupling (12).

9. The S-type fully sealed Roots pump according to claim 1, characterized in that: The bottom of the pump body (2) has a base (26), and the base (26) has an extension portion (27) extending in the direction of the motor (1). The end of the extension portion (27) is located below the motor (1) and is provided with a mounting hole (28).

10. The S-type fully sealed Roots pump according to claim 9, characterized in that: The base (26) is detachably connected to the pump body (2); the pump body (2) is provided with a connecting seat (30) connected to the base (26); the base (26) comprises a vertical support foot (31); the support foot (31) has a hollow portion (29); a screw connected to the connecting seat (30) is arranged in the hollow portion (29).

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