Screw vacuum pump

Abstract

The utility model relates to a screw vacuum pump which comprises a driving structure and a box body structure, the driving structure is connected with the box body structure, a rotating structure capable of achieving heat dissipation and cooling is arranged in the box body structure, the rotating structure is connected with the driving structure, the rotating structure comprises screw rotating shafts symmetrically installed in the box body structure, and communicating holes are formed in the screw rotating shafts. The rotating structure further comprises communicating type high-pressure cavity plates installed at the right ends of the box bodies, the interior of each communicating type high-pressure cavity plate is of a cavity structure, U-shaped openings are formed in the two ends of two sets of screw rotating shafts of each communicating type high-pressure cavity plate, a liquid cooling self-adaptive pump is arranged on the right end face of each communicating type high-pressure cavity plate, and gears are connected to the right ends of the screw rotating shafts. The two sets of gears form gear transmission, a coronal medium outlet is formed in the connecting position of the right end of each gear and the screw rotating shaft, and a through opening is further formed in the right end of the screw rotating shaft located on the lower portion in the box body structure. The screw vacuum pump solves the problem that an existing screw vacuum pump is low in heat dissipation and cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling devices, in particular to a screw vacuum pump. Background Art

[0002] A screw vacuum pump achieves vacuum extraction by rotating and meshing two screws. However, in existing screw vacuum pumps, the rotation of the screw generates high temperatures, which can easily cause deformation of the screw and damage to internal structural parts over a long period of time, shortening the service life of the screw vacuum pump.

[0003] Therefore, in order to solve the above problems, Chinese patent CN219587775U, a screw vacuum pump points out that the cooling water flows in sequence along the cooling chamber three, the cooling chamber two and the cooling chamber one, which can stably cool the entire vacuum pump, and directly discharge the water from the water outlet of the front cover after the cooling is completed. Since the liquid inlet is arranged on the upper side wall and the liquid outlet is arranged on the lower side wall, the cooling liquid can smoothly cool the cooling chamber three, the cooling chamber two and the cooling chamber one in turn, and can rely on the principle of water flowing downwards, so that the water can flow out smoothly from the cooling chamber one, further improving the cooling efficiency of the screw vacuum pump. Although the above patent can improve the heat dissipation efficiency, it still has shortcomings. According to the patent appendix of the patent Figure 4 It can be seen that this patent performs cooling on the outside of the screw, and the high temperature is generated between the two threads. Therefore, although this patent can perform cooling, the cooling effect is not good and it is impossible to penetrate deep into the screw to perform direct cooling at the high temperature origin.

[0004] Therefore, in order to improve the heat dissipation efficiency, a screw vacuum pump is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a screw vacuum pump, which solves the problem of low heat dissipation and cooling effect of the existing screw vacuum pump.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screw vacuum pump, comprising a drive structure and a box structure, the drive structure being connected to the box structure, a rotating structure capable of heat dissipation and cooling being provided in the box structure, the rotating structure being connected to the drive structure, the rotating structure comprising a screw shaft symmetrically mounted in the box structure, and a connecting hole being provided inside the screw shaft, the connecting hole being horizontally penetrated, the rotating structure also comprising a connecting high-pressure cavity plate mounted on the box body, both having right ends, the interior of the connecting high-pressure cavity plate being a cavity structure, both ends of the two sets of screw shafts being provided with U-shaped openings, the right end surface of the connecting high-pressure cavity plate being provided with a liquid-cooled adaptive pump, the right end of the screw shaft being connected with a gear, and the two sets of gears forming a gear transmission, a crown-shaped medium outlet being provided at the connection between the right end of the gear and the screw shaft, the right end of the screw shaft located at the lower part of the box structure being also provided with a through-hole, and a connecting hole being provided in the box structure at the through-hole, the connecting hole being connected with a pipe, and the pipe being connected to the liquid-cooled adaptive pump.

[0007] Through the above technical solution, further, the box structure includes a gear box, a double-sided connecting plate, a pump body box, and an end mounting cover, wherein the gear box is installed on the left end face of the double-sided connecting plate, the right end face of the double-sided connecting plate is connected to and installed with the pump body box, the right end face of the pump body box is installed with an end mounting cover, and the screw shaft is horizontally installed in the gear box, the double-sided connecting plate, the pump body box, and the end mounting cover.

[0008] Furthermore, a second bearing seat is installed on the surface of the end mounting cover and the double-sided connecting plate, and the screw shaft is connected to the inner ring of the second bearing seat.

[0009] As a preferred technical solution, the driving structure includes a connecting seat installed on the left side of the gear box, and a servo motor is installed on the left end face of the connecting seat, and the output end of the servo motor is connected to the screw shaft through a coupling.

[0010] Furthermore, a first bearing seat is provided on the right side of the gear box, and a set of screw shafts pass through the inner ring of the first bearing seat and are connected thereto.

[0011] Compared with the prior art, the present invention provides a screw vacuum pump with the following features:

[0012] Beneficial effects:

[0013] 1. This screw vacuum pump mainly uses the action of a liquid-cooled adaptive pump to pump the cooling medium into the connected high-pressure cavity plate, and then enters the screw shaft through the connecting hole, so that the heat generated by the screw shaft is taken away and enters the gear box. The cooling medium in the gear box is then extracted through a pipe. At this time, the pipe located on the periphery of the vacuum pump will be immersed in water to cool it down, and then introduced into the liquid-cooled adaptive pump through the pipe. The reciprocating cycle is carried out in sequence to realize the cooling of the center of the screw shaft, and the origin of the heat source can be cooled. Compared with the existing cooling method, the cooling effect is greatly improved, thereby solving the problem of low heat dissipation and cooling effect of the existing screw vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a screw vacuum pump of the utility model;

[0015] Figure 2 This utility model is a screw vacuum pump Figure 1 A local enlarged structural diagram of point A;

[0016] Figure 3 This utility model is a screw vacuum pump Figure 1 A schematic diagram of the partially enlarged structure at point B;

[0017] Figure 4 This is a schematic diagram of a connecting hole of a screw vacuum pump of the present utility model;

[0018] Figure 5 This is a schematic diagram of the pump body box structure of a screw vacuum pump of the utility model;

[0019] Figure 6 This utility model is a screw vacuum pump Figure 5 A schematic diagram of the partially enlarged structure at point C;

[0020] Figure 7 This utility model is a screw vacuum pump Figure 5 Schematic diagram of the local enlarged structure at point D.

[0021] In the figure: 1. Servo motor; 2. Connecting seat; 3. Coupling; 4. Gear box; 5. Double-sided connecting plate; 6. Pump body box; 7. First bearing seat; 8. Second bearing seat; 9. Screw shaft; 10. Gear; 11. Crowned medium outlet; 12. End mounting cover; 13. Connecting high-pressure cavity plate; 14. Liquid-cooled adaptive pump; 15. Connecting hole; 16. Connecting hole; 17. Through-hole; 18. U-shaped opening. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example

[0024] See also Figure 1-7 The utility model provides the following technical solutions: a screw vacuum pump, including a driving structure and a box structure, the driving structure is connected to the box structure, and a rotating structure capable of achieving heat dissipation and cooling is provided in the box structure, and the rotating structure is connected to the driving structure. The rotating structure includes a screw shaft 9 symmetrically installed in the box structure, and a connecting hole 15 is provided inside the screw shaft 9, and the connecting hole 15 passes through horizontally. The rotating structure also includes a connecting high-pressure cavity plate 13 installed on the right end of the box. The interior of the connecting high-pressure cavity plate 13 is a cavity structure. Both ends of the two groups of screw shafts 9 are provided with U-shaped openings 18. The right end surface of the connecting high-pressure cavity plate 13 is provided with a liquid-cooled adaptive pump 14. The right end of the screw shaft 9 is connected with a gear 10, and the two groups of gears 10 constitute a gear transmission. A crown-shaped medium outlet 11 is installed at the connection between the right end of the gear 10 and the screw shaft 9. The purpose of the crown-shaped medium outlet 11 provided here is to be able to dissipate the cooling medium when the cooling medium is ejected from the through-hole. A spray shape is formed, which can prevent a certain part from being in contact with a high-temperature medium for a long time and causing local high-temperature deformation. A through-hole 17 is also provided at the right end of the screw shaft 9 located at the bottom of the box structure, and a connecting hole 16 is opened in the box structure at the through-hole 17. A pipe is connected to the connecting hole 16, and the pipe is connected to the liquid-cooled adaptive pump 14. It should also be noted that the lengths of the two groups of screw shafts 9 are different. The screw shaft 9 located in the box structure (that is, the pump box 6) is shorter than the lower screw shaft 9, and the opening positions of the two groups of screw shafts 9 are different. The opening of the upper group of screw shafts 9 is in the U-shaped opening 18, and the opening of the lower screw shaft 9 can not only leak out at the U-shaped opening 18, but also be left at the through-hole 17. The purpose of this setting is also to prevent excessive high-temperature medium from being concentrated in a certain place in the gear box 4, to prevent deformation of a certain part, and to make the temperature in the gear box 4 more balanced.

[0025] In this embodiment, the specific working principle is as follows: the screw vacuum pump mainly improves the cooling effect by cooling the center of the heat source. The cooling medium is pumped into the connected high-pressure cavity plate 13 through the liquid-cooled adaptive pump 14, and then enters the right end of the installation box through the connecting hole 15 in the screw shaft 9. During the movement of the cooling medium, the high temperature generated by the rotation of the two sets of screw shafts 9 is absorbed, and this absorption is carried out at the center of the screw shaft 9. This method can effectively control the temperature of the screw shaft 9, and its cooling effect is better. It can keep the overall temperature index inside the box structure within a certain range, and then the high-temperature cooling medium in the box structure is transmitted to the liquid-cooled adaptive pump 14 through the pipe, and then reciprocates. It should be noted that the pipe located outside the vacuum pump will be immersed in water to cool it down.

[0026] According to the above, the box structure can be found in Figure 1 、 Figure 2 、 Figure 3 It can be seen that the box structure includes a gear box 4, a double-sided connecting plate 5, a pump body box 6, and an end mounting cover 12. The gear box 4 is installed on the left end face of the double-sided connecting plate 5, the right end face of the double-sided connecting plate 5 is connected to the pump body box 6, and the right end face of the pump body box 6 is installed with the end mounting cover 12. The screw shaft 9 is horizontally installed in the gear box 4, the double-sided connecting plate 5, the pump body box 6, and the end mounting cover 12.

[0027] In order to facilitate the rotation of the screw shaft 9, please refer to Figure 2 and Figure 3 It can be seen that the second bearing seat 8 is installed on the surface of the end mounting cover 12 and the double-sided connecting plate 5, and its screw shaft 9 is connected to the inner ring of the second bearing seat 8.

[0028] According to the above drive structure, please refer to Figure 1 It can be seen that the driving structure includes a connecting base 2 installed on the left side of the gear box 4, and a servo motor 1 is installed on the left end face of the connecting base 2. The output end of the servo motor 1 is connected to the screw shaft 9 through a coupling 3.

[0029] According to the above, in order to facilitate the rotation of the screw shaft 9, please refer to Figure 2 It can be seen that a first bearing seat 7 is provided on the right side of the gear box 4, and a set of screw shafts 9 pass through the inner ring of the first bearing seat 7 and are connected to 3.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A screw vacuum pump, comprising a drive structure and a housing structure, wherein the drive structure is connected to the housing structure, and wherein: The box structure is provided with a rotating structure capable of achieving heat dissipation and cooling, and the rotating structure is connected to the driving structure. The rotating structure includes a screw shaft (9) symmetrically installed in the box structure, and a connecting hole (15) is provided inside the screw shaft (9), and the connecting hole (15) is horizontally penetrated. The rotating structure also includes a connecting high-pressure cavity plate (13) installed at the right end of the box, and the inside of the connecting high-pressure cavity plate (13) is a cavity structure. The ends of the two sets of screw shafts (9) are both provided with U-shaped openings (18). The connecting high-pressure cavity plate (13) is a hollow cavity structure. 3) A liquid-cooled adaptive pump (14) is provided on the right end face, and a gear (10) is connected to the right end of the screw shaft (9), and two sets of gears (10) constitute a gear transmission. A crown-shaped medium outlet (11) is installed at the connection between the right end of the gear (10) and the screw shaft (9). A through-hole (17) is also provided on the right end of the screw shaft (9) located at the bottom of the box structure, and a connecting hole (16) is opened in the box structure at the through-hole (17). A pipe is connected to the connecting hole (16), and the pipe is connected to the liquid-cooled adaptive pump (14).

2. A screw vacuum pump according to claim 1, characterized in that: The box structure comprises a gear box (4), a double-sided connecting plate (5), a pump box (6), and an end mounting cover (12); the gear box (4) is mounted on the left end face of the double-sided connecting plate (5); the pump box (6) is connected and mounted on the right end face of the double-sided connecting plate (5); the end mounting cover (12) is mounted on the right end face of the pump box (6); and the screw shaft (9) is transversely mounted inside the gear box (4), the double-sided connecting plate (5), the pump box (6), and the end mounting cover (12).

3. A screw vacuum pump according to claim 2, characterized in that: The end mounting cover (12) and the double-sided connecting plate (5) are mounted with a second bearing seat (8) on their surfaces, and the screw shaft (9) is connected to the inner ring of the second bearing seat (8).

4. A screw vacuum pump according to claim 1, characterized in that: The driving structure comprises a connecting seat (2) mounted on the left side of the gear box (4), and a servo motor (1) is mounted on the left end face of the connecting seat (2), and the output end of the servo motor (1) is connected to the screw shaft (9) via a coupling (3).

5. A screw vacuum pump according to claim 4, characterized in that: A first bearing seat (7) is provided on the right side of the gear box (4), and a set of screw shafts (9) pass through the inner ring of the first bearing seat (7) and are connected to (3).

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