Rotor assembly of anti-corrosion dry-type spiral vacuum pump

Abstract

The utility model relates to the technical field of vacuum pumps, and provides an anti-corrosion dry-type spiral vacuum pump rotor assembly which comprises two rotor bodies, spiral end faces are arranged on the outer surfaces of the rotor bodies, and the anti-corrosion dry-type spiral vacuum pump rotor assembly further comprises circular grooves formed in one sides of the rotor bodies. According to the device, a hexagon wrench is inserted into the hexagonal groove and rotates to drive the screw rod to rotate, and then under the matching of threaded connection of the screw rod and the movable sleeve, the movable sleeve can move towards one side along the outer surface of the screw rod, the hexagonal groove synchronously slides in the circular groove, and the fixed sleeve and the gear are synchronously driven to move towards one side; the two gears are aligned, so that when the length of the two rotor bodies has an error, the positions of the two gears can be properly adjusted, and the two gears are completely meshed, thereby preventing the acting force borne by the two gears during rotation from being increased, reducing the abrasion of the gears, and further prolonging the service life of the rotor assembly of the dry type spiral vacuum pump.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a corrosion-resistant dry spiral vacuum pump rotor assembly. Background Technology

[0002] A dry spiral vacuum pump is a high-tech vacuum pumping device. It utilizes a pair of helical blades (screws) rotating in opposite directions at high speed within the pump casing. The left and right screws, driven by gears and rotating synchronously in opposite directions without contact, rotate at high speed. The pump casing and the meshing helical grooves of the propellers divide the pump into multiple spaces, forming multiple stages. Gas is transported within these equal grooves without compression; only the helical structure at the very end of the screw compresses the gas, ultimately creating a vacuum. Dry spiral vacuum pumps are widely used in electronics, chemical engineering, biomedicine, and many other fields, becoming a key piece of equipment for the development of efficient, environmentally friendly, and intelligent manufacturing.

[0003] In the existing technology, during the manufacturing process of the rotor inside the dry spiral vacuum pump, there may be errors in the rotor length. This may cause misalignment between the two gears mounted on the two rotor shafts, resulting in incomplete meshing between the two gears. Consequently, when the rotor rotates, the force on the gears is easily increased, accelerating gear wear and reducing the service life of the dry spiral vacuum pump rotor assembly. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where the rotor length of the internal rotor of a dry spiral vacuum pump is incorrect during the manufacturing process. This error can cause misalignment between the two gears mounted on the two rotor shafts, resulting in incomplete meshing between the two gears. Consequently, when the rotor rotates, the force on the gears increases, accelerating gear wear and reducing the service life of the dry spiral vacuum pump rotor assembly.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a corrosion-resistant dry spiral vacuum pump rotor assembly, comprising: two rotor bodies, wherein the outer surface of each rotor body is provided with a spiral end face, and further comprising:

[0006] A circular groove is formed on one side of the rotor body. A threaded groove is formed on one side of the inner wall of the circular groove. A screw is rotatably connected to the inner wall of the threaded groove. A movable sleeve is slidably connected inside the circular groove. The movable sleeve is threadedly connected to the screw. A fixed sleeve is fixedly connected to the outer surface of the movable sleeve. Multiple sliding grooves are formed in a circumferential array on the outer surface of the fixed sleeve. Gears are provided on the outer surface of the fixed sleeve. Multiple guide rods are fixedly connected in a circumferential array on one side of the inner wall of the circular groove. Multiple guide grooves are formed in a circumferential array on one side of the movable sleeve. The outer surface of the guide rods is slidably connected to the inside of the guide grooves. A hexagonal groove is formed on one side of the screw.

[0007] Preferably, the gear is slidably connected to the fixed sleeve, and the inner wall of the gear is fixedly connected with multiple sliders in a circumferential array.

[0008] Preferably, the outer surface of the fixed sleeve is provided with a plurality of sliding grooves in a circumferential array, and the outer surface of the slider is slidably connected to the inside of the sliding grooves.

[0009] Preferably, a fixing ring is fixedly connected to one side of the gear, and multiple limiting rods are slidably connected to the outer surface of the fixing ring in a circumferential array. Multiple limiting holes are opened in a circumferential array on the outer surface of the fixing sleeve, and one end of the limiting rod is slidably connected to the inside of the limiting hole.

[0010] Preferably, the outer surface of the fixed ring is rotatably connected to a limiting sleeve, the inner wall of the limiting sleeve is fixedly connected with multiple magnet blocks in a circumferential array, the magnet blocks are provided with arc-shaped surfaces, and the limiting rod is made of metal.

[0011] Preferably, a torsion spring is provided on the outer surface of the limiting sleeve, and the torsion spring is fixedly connected to the limiting sleeve and the gear respectively.

[0012] Preferably, one end of one of the movable sleeves is detachably and fixedly connected to a drive shaft.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model utilizes a hexagonal wrench inserted into a hexagonal groove and rotated to drive the screw to rotate. Then, with the screw and movable sleeve connected by threads, and with the cooperation of the guide rod and guide groove, the movable sleeve can move to one side along the outer surface of the screw. Simultaneously, the hexagonal groove slides inside the circular groove, driving the fixed sleeve and gears to move to one side, aligning the two gears. This allows for appropriate adjustment of the gear positions when there is an error in the length of the two rotor bodies, ensuring complete meshing of the two gears. This prevents increased force on the gears during rotation, reduces gear wear, and ultimately improves the service life of the dry spiral vacuum pump rotor assembly.

[0015] 2. In this utility model, by manually rotating the fixing ring counterclockwise, the magnet block rotates counterclockwise, simultaneously causing the torsion spring to continue to rotate. At this time, the distance between the arc-shaped surface of the magnet block and the limiting rod gradually increases. Under the magnetic force of the magnet block, an attractive force is generated on the limiting rod, causing the limiting rod to slide outward and disengage from the inside of the limiting hole, thus releasing the limitation on the fixing ring and gear. At this time, the gear can be pushed outward, causing the slider to slide outward along the inside of the sliding groove, thereby completing the disassembly of the gear. Through the cooperation of the slider and the sliding groove, the gear can only slide along the outer surface of the fixing sleeve and cannot rotate. In this way, when the gear is damaged and needs to be replaced, the gear can be easily disassembled, thereby improving the efficiency of gear disassembly and replacement. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a corrosion-resistant dry spiral vacuum pump rotor assembly provided by this utility model;

[0017] Figure 2 A side view of the rotor assembly of a corrosion-resistant dry spiral vacuum pump provided by this utility model;

[0018] Figure 3 This utility model provides a corrosion-resistant dry spiral vacuum pump rotor assembly. Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a partial cross-sectional structural diagram of a corrosion-resistant dry spiral vacuum pump rotor assembly provided by this utility model.

[0020] Legend:

[0021] 1. Rotor body; 2. Helical end face; 3. Movable sleeve; 4. Fixed sleeve; 5. Gear; 6. Drive shaft; 7. Screw; 8. Hexagonal groove; 9. Guide groove; 10. Slide groove; 11. Fixed ring; 12. Limiting sleeve; 13. Magnet block; 14. Limiting rod; 15. Limiting hole; 16. Guide rod; 17. Circular groove; 18. Threaded groove; 19. Slider; 20. Torsion spring. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Examples, such as Figure 1-4 As shown, this utility model provides a corrosion-resistant dry spiral vacuum pump rotor assembly, including: two rotor bodies 1, the outer surface of the rotor body 1 is provided with a spiral end face 2, and also includes: a circular groove 17, which is opened on one side of the rotor body 1. A threaded groove 18 is opened on one side of the inner wall of the circular groove 17. A screw 7 is rotatably connected to the inner wall of the threaded groove 18. A movable sleeve 3 is slidably connected inside the circular groove 17. The movable sleeve 3 is threadedly connected to the screw 7. A fixed sleeve 4 is fixedly connected to the outer surface of the movable sleeve 3. Multiple sliding grooves 10 are opened in a circumferential array on the outer surface of the fixed sleeve 4. A gear 5 is provided on the outer surface of the fixed sleeve 4. Multiple guide rods 16 are fixedly connected in a circumferential array on one side of the inner wall of the circular groove 17. Multiple guide grooves 9 are opened in a circumferential array on one side of the movable sleeve 3. The outer surface of the guide rods 16 is slidably connected to the inside of the guide grooves 9. A hexagonal groove 8 is opened on one side of the screw 7.

[0025] Furthermore, such as Figure 1-4 As shown, gear 5 is slidably connected to fixed sleeve 4. Multiple sliders 19 are fixedly connected to the inner wall of gear 5 in a circumferential array. With the above arrangement, gear 5 can slide along the outer surface of fixed sleeve 4.

[0026] Furthermore, such as Figure 1-4 As shown, the outer surface of the fixed sleeve 4 is provided with multiple grooves 10 in a circumferential array. The outer surface of the slider 19 is slidably connected to the inside of the groove 10. Through the cooperation between the slider 19 and the groove 10, the gear 5 can only slide along the outer surface of the fixed sleeve 4 and cannot rotate, thus playing a certain guiding role.

[0027] Furthermore, such as Figure 1-4 As shown, a fixing ring 11 is fixedly connected to one side of the gear 5. Multiple limiting rods 14 are slidably connected to the outer surface of the fixing ring 11 in a circumferential array. Multiple limiting holes 15 are opened in a circumferential array on the outer surface of the fixing sleeve 4. One end of the limiting rod 14 is slidably connected to the inside of the limiting hole 15. By inserting the limiting rod 14 into the inside of the limiting hole 15, the fixing ring 11 and the gear 5 can be limited and fixed.

[0028] Furthermore, such as Figure 1-4As shown, a limiting sleeve 12 is rotatably connected to the outer surface of the fixed ring 11. Multiple magnet blocks 13 are fixedly connected in a circumferential array on the inner wall of the limiting sleeve 12. The magnet blocks 13 are provided with arc-shaped surfaces. The limiting rod 14 is made of metal. Under the magnetic action of the magnet blocks 13, a magnetic force can be generated on the limiting rod 14, causing the limiting rod 14 to slide outward and disengage from the inside of the limiting hole 15, thereby releasing the limiting of the fixed ring 11 and the gear 5.

[0029] Furthermore, such as Figure 1-4 As shown, a torsion spring 20 is provided on the outer surface of the limiting sleeve 12. The torsion spring 20 is fixedly connected to the limiting sleeve 12 and the gear 5 respectively. Under the reset force of the torsion spring 20, the limiting sleeve 12 can rotate around the fixed ring 11 at an appropriate angle.

[0030] Furthermore, such as Figure 1-4 As shown, one end of one of the movable sleeves 3 is detachably and fixedly connected to a drive shaft 6. With the above-mentioned arrangement, the drive shaft 6 and the movable sleeve 3 can be fixed by a snap-fit ​​structure or by bolts.

[0031] Working principle: In use, when there is an error in the length of the two rotor bodies 1, a hex wrench can be inserted into the hexagonal groove 8 and rotated to drive the screw 7 to rotate. Then, with the screw 7 and the movable sleeve 3 connected by threads, and with the cooperation of the guide rod 16 and the guide groove 9, the movable sleeve 3 can move to one side along the outer surface of the screw 7, simultaneously causing the hexagonal groove 8 to slide inside the circular groove 17. This simultaneously drives the fixed sleeve 4 and the gear 5 to move to one side, aligning the two gears 5. Thus, when there is an error in the length of the two rotor bodies 1, the position of the two gears 5 can be adjusted appropriately to align them. The gears 5 are fully engaged, thus preventing an increase in the force exerted on them during rotation, reducing wear, and extending the service life of the dry spiral vacuum pump rotor assembly. When gears 5 need replacement after a period of use, the drive shaft 6 is disassembled. The drive shaft 6 is connected to the movable sleeve 3 via a snap-fit ​​structure or bolts. The torsion spring 20 is in a torsional state. Under the restoring force of the torsion spring 20, the limiting sleeve 12 can rotate around the fixed ring 11 at an appropriate angle, simultaneously rotating the magnet block 13 at an appropriate angle, causing the magnet block 13 to press against the limiting rod 14. The limiting rod 14 is inserted into the limiting hole 15 to limit the fixing ring 11 and the gear 5. The restoring force of the torsion spring 20 is greater than the rotational force of the rotor body 1, so that the magnet 13 is always in a state of pressing against the limiting rod 14. This ensures that when the rotor body 1 rotates, the gear 5 can rotate synchronously without any positional deviation. By manually rotating the fixing ring 11 counterclockwise, it drives the magnet 13 to rotate counterclockwise, which in turn causes the torsion spring 20 to continue to rotate. At this time, the distance between the arc-shaped surface of the magnet 13 and the limiting rod 14 gradually increases. Under the magnetic action of the magnet 13, the limiting rod 14 can be pressed against the limiting rod 14. 4. A suction force is generated, which drives the limiting rod 14 to slide outward and disengage from the inside of the limiting hole 15, releasing the limiting of the fixing ring 11 and gear 5. At this time, the gear 5 can be pushed outward, so that the slider 19 slides outward along the inside of the slide groove 10, thus completing the disassembly of the gear 5. With the cooperation of the slider 19 and the slide groove 10, the gear 5 can only slide along the outer surface of the fixing sleeve 4 and cannot rotate. In this way, when the gear 5 is damaged and needs to be replaced, the gear 5 can be easily disassembled, thereby improving the efficiency of disassembly and replacement of the gear 5. The rotor assembly of the dry spiral vacuum pump has a certain anti-corrosion effect.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A corrosion-resistant dry spiral vacuum pump rotor assembly, comprising: Two rotor bodies (1), the outer surface of which is provided with a helical end face (2), characterized in that it further includes: A circular groove (17) is formed on one side of the rotor body (1). A threaded groove (18) is formed on one side of the inner wall of the circular groove (17). A screw (7) is rotatably connected to the inner wall of the threaded groove (18). A movable sleeve (3) is slidably connected inside the circular groove (17). The movable sleeve (3) is threadedly connected to the screw (7). A fixed sleeve (4) is fixedly connected to the outer surface of the movable sleeve (3). A plurality of sliding grooves (10) are formed in a circumferential array on the outer surface of the fixed sleeve (4). A gear (5) is provided on the outer surface of the fixed sleeve (4). A plurality of guide rods (16) are fixedly connected in a circumferential array on one side of the inner wall of the circular groove (17). A plurality of guide grooves (9) are formed in a circumferential array on one side of the movable sleeve (3). The outer surface of the guide rods (16) is slidably connected inside the guide grooves (9). A hexagonal groove (8) is formed on one side of the screw (7).

2. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 1, characterized in that: The gear (5) is slidably connected to the fixed sleeve (4), and the inner wall of the gear (5) is fixedly connected with multiple sliders (19) in a circumferential array.

3. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 2, characterized in that: The outer surface of the fixed sleeve (4) is provided with a plurality of grooves (10) arranged in a circumferential array, and the outer surface of the slider (19) is slidably connected to the inside of the grooves (10).

4. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 3, characterized in that: A fixing ring (11) is fixedly connected to one side of the gear (5). Multiple limiting rods (14) are slidably connected to the outer surface of the fixing ring (11) in a circumferential array. Multiple limiting holes (15) are opened in a circumferential array on the outer surface of the fixing sleeve (4). One end of the limiting rod (14) is slidably connected to the inside of the limiting hole (15).

5. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 4, characterized in that: The outer surface of the fixed ring (11) is rotatably connected to the limiting sleeve (12). The inner wall of the limiting sleeve (12) is fixedly connected with multiple magnet blocks (13) in a circumferential array. The magnet blocks (13) are provided with arc-shaped surfaces. The limiting rod (14) is made of metal.

6. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 5, characterized in that: The outer surface of the limiting sleeve (12) is provided with a torsion spring (20), which is fixedly connected to the limiting sleeve (12) and the gear (5) respectively.

7. The corrosion-resistant dry spiral vacuum pump rotor assembly according to claim 1, characterized in that: One end of one of the movable sleeves (3) is detachably and fixedly connected to a drive shaft (6).

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