A screw vacuum pump with a screw rotor cooling structure

Abstract

This utility model discloses a screw vacuum pump with a screw rotor cooling structure, including a pump body shell and a rotor movably installed inside the pump body shell. The rotor has heat exchange blind holes inside, and a cooling assembly located outside the pump body shell is movably installed at the end of the rotor. A noise reduction assembly is movably installed outside the pump body shell. In this screw vacuum pump with a screw rotor cooling structure, the cooling medium is injected from the inlet and then enters the heat exchange blind hole from the end of the inlet pipe. The heat generated by the rotor exchanges heat with the cooling medium. A flat heat pipe embedded in the rotor conducts heat to the cooling medium in the heat exchange blind hole for heat exchange. The cooling medium is discharged from the outlet, increasing the heat conduction area. Simultaneously, the cooling medium is injected into the hollow cavity from the inlet, flows along the helical blades within the hollow cavity, and then exits from the outlet. The cooling medium, through heat conduction by the shell, cools the pump body shell, thereby enhancing the cooling effect on the rotor.

Description

Technical Field

[0001] This utility model relates to the field of screw vacuum pump technology, specifically a screw vacuum pump with a screw rotor cooling structure. Background Technology

[0002] A screw vacuum pump is a vacuum device that uses a pair of screws to rotate synchronously in opposite directions inside the pump casing to pump and discharge gas. It belongs to the category of gas transfer pumps. Its working principle is that the rotation of the screws forms a sealed cavity inside the pump casing, which draws in gas from the inlet and pushes it to the outlet. It has the characteristics of fast pumping speed, high vacuum degree and stable operation.

[0003] The existing patent authorization announcement number CN216381864U discloses a screw rotor cooling structure and a vacuum pump. A blind hole suitable for containing coolant is opened at one end of the rotor body. A guide block is rotatably connected to the end of the rotor body. The guide block is connected to a guide pipe. The guide pipe extends into the blind hole. There is a gap between the guide pipe and the inner wall of the blind hole. The guide block has an inlet and an outlet. The coolant flows into the guide pipe through the inlet and then into the blind hole. The coolant flows continuously into the blind hole through the guide pipe. The coolant flows to the outlet through the gap between the guide pipe and the inner wall of the blind hole and flows out through the outlet. This makes the coolant circulate in the rotor body to cool the rotor body.

[0004] In the aforementioned patent, the rotor screw conducts heat to the blind hole position for heat exchange with the coolant for cooling. However, the blind hole is located inside the rotor shaft, which limits the heat exchange area. Furthermore, the pump casing cannot participate in heat dissipation, resulting in poor heat conduction and cooling effects. Additionally, the screw vacuum pump generates noise during operation, which cannot be reduced, thus affecting its performance. Utility Model Content

[0005] The purpose of this utility model is to provide a screw vacuum pump with a screw rotor cooling structure to solve the problems mentioned in the background art, such as the blind hole being set inside the rotor shaft, which has a limited heat exchange area and the pump casing not being able to participate in heat dissipation, resulting in poor heat conduction and cooling effect. At the same time, the screw vacuum pump generates a certain amount of noise during use, which cannot be reduced, thus affecting the performance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screw vacuum pump with a screw rotor cooling structure, comprising a pump body shell and a rotor movably installed inside the pump body shell. The rotor has a heat exchange blind hole inside. A cooling assembly located outside the pump body shell is movably installed at the end of the rotor. A noise reduction assembly is movably installed outside the pump body shell. A support leg is fixedly installed at the bottom of the pump body shell. The pump body shell includes a housing, inside which a hollow cavity is formed. Helical blades are equidistantly fixedly installed inside the hollow cavity. An inlet and an outlet communicating with the hollow cavity are fixedly installed at the top and bottom of the housing, respectively. The cooling assembly includes a connector movably sleeved on the outside of the rotor. An inlet and an outlet are formed inside the connector. An inlet pipe communicating with the inlet is fixedly installed inside the connector, extending into the heat exchange blind hole. Flat heat pipes are equidistantly embedded and fixedly installed inside the rotor.

[0007] Preferably, the evaporation section of the flat heat pipe is located on the outer side, and the condensation section of the flat heat pipe extends into the interior of the heat exchange blind hole.

[0008] Preferably, a cooling flow channel is provided between the heat exchange blind hole and the liquid inlet pipe.

[0009] Preferably, the upper and lower sides inside the housing are fixedly connected to an inner support plate.

[0010] Preferably, the noise reduction assembly includes a noise reduction shell one and a noise reduction shell two. The noise reduction shell one and the noise reduction shell two are respectively movably snapped onto the left and right sides of the pump body outer shell. Sound-absorbing pads are fixedly installed on the inner sides of both the noise reduction shell one and the noise reduction shell two. Card plates are fixedly connected to the upper and lower sides of the inner side of the noise reduction shell one. Card slots corresponding to the card plates are opened on the inner side of the noise reduction shell two. Fixing holes are opened inside both the noise reduction shell two and the card plates. Fixing bolts penetrating the fixing holes are movably installed on the outer side of the noise reduction shell two.

[0011] Preferably, the inner sides of both the noise reduction shell one and the noise reduction shell two are provided with misalignment grooves corresponding to the support legs.

[0012] Preferably, the interior of the noise reduction shell one and the noise reduction shell two are provided with slots corresponding to the positions of the inlet and outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The cooling medium is injected from the inlet and then enters the heat exchange blind hole from the end of the inlet pipe. The heat generated by the rotor exchanges heat with the cooling medium. The flat heat pipe embedded in the rotor conducts heat to the cooling medium in the heat exchange blind hole for heat exchange. The cooling medium is discharged from the outlet, which expands the heat conduction area. At the same time, the cooling medium is injected into the hollow cavity from the inlet, flows along the spiral blades in the hollow cavity, and is then discharged from the outlet. The cooling medium conducts heat through the shell, which cools the pump body shell, thereby enhancing the cooling effect on the rotor.

[0015] 2. Noise-reducing shell one and noise-reducing shell two are respectively snapped together from the left and right sides of the pump body shell. The snapping plate is inserted into the snapping slot, so that noise-reducing shell one and noise-reducing shell two cover the outside of the pump body shell. After the fixing holes on the snapping plate are aligned with the fixing holes on the noise-reducing shell two, the fixing bolts are screwed into the fixing holes to fix noise-reducing shell one and noise-reducing shell two to the outside of the pump body shell. The sound-absorbing pads inside noise-reducing shell one and noise-reducing shell two absorb and block the noise generated by the pump body shell, thereby reducing noise diffusion, reducing noise, and ensuring the user experience. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the support leg of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the pump body shell of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the heat exchange blind hole and cooling assembly of this utility model;

[0020] Figure 5 This is an exploded three-dimensional structural diagram of the noise reduction component of this utility model.

[0021] In the diagram: 1. Pump body shell; 11. Shell; 12. Hollow cavity; 13. Spiral blade; 14. Inlet; 15. Outlet; 16. Inner support plate; 2. Rotor; 3. Heat exchange blind hole; 4. Cooling assembly; 41. Connector; 42. Liquid inlet; 43. Liquid outlet; 44. Liquid inlet pipe; 46. Flat heat pipe; 5. Noise reduction assembly; 51. Noise reduction shell one; 52. Noise reduction shell two; 53. Sound-absorbing pad; 54. Clamping plate; 55. Clamping groove; 56. Fixing hole; 57. Fixing bolt; 6. Support leg. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a technical solution: a screw vacuum pump with a screw rotor cooling structure, including a pump body shell 1 and a rotor 2 movably installed inside the pump body shell 1. The rotor 2 has a heat exchange blind hole 3 inside. A cooling assembly 4 located outside the pump body shell 1 is movably installed at the end of the rotor 2. A noise reduction assembly 5 is movably installed on the outside of the pump body shell 1. A support leg 6 is fixedly installed at the bottom of the pump body shell 1. The pump body shell 1 includes a housing 11, with a hollow cavity 12 inside. Spiral blades 13 are equidistantly fixedly installed inside the hollow cavity 12. An inlet 14 and an outlet 15 communicating with the hollow cavity 12 are fixedly installed at the top and bottom of the housing 11, respectively. The cooling assembly 4 includes a connector 41, which is movably sleeved on the outside of the rotor 2. The connector 41 has an inlet 42 and an outlet 43. An inlet pipe 44 connected to the inlet 42 is fixedly installed inside the connector 41. The inlet pipe 44 extends into the heat exchange blind hole 3. Flat heat pipes 46 are fixedly embedded at equal intervals inside the rotor 2. The cooling medium is injected from the inlet 42 and then enters the heat exchange blind hole 3 from the end of the inlet pipe 44. The heat generated by the rotor 2 exchanges heat with the cooling medium. The flat heat pipes 46 embedded in the rotor 2 conduct heat to the cooling medium in the heat exchange blind hole 3 for heat exchange. The cooling medium is discharged from the outlet 43, which expands the heat conduction area. At the same time, the cooling medium is injected into the hollow cavity 12 from the inlet 14, flows along the spiral blades 13 in the hollow cavity 12, and then is discharged from the outlet 15. The cooling medium conducts heat through the shell 11 and cools the pump shell 1, thereby enhancing the cooling effect on the rotor 2.

[0024] The evaporation section of the flat heat pipe 46 is located on the outside, and the condensation section of the flat heat pipe 46 extends into the interior of the heat exchange blind hole 3. The flat heat pipe 46 can more efficiently conduct the heat generated outside the rotor 2 to the cooling medium inside the heat exchange blind hole 3, thereby improving the overall heat exchange efficiency. By setting the evaporation section on the outside, it can directly contact the high-temperature area of ​​friction on the surface of the rotor 2, while the condensation section extends into the heat exchange blind hole 3 to fully contact the cooling medium, ensuring that heat is quickly transferred and dissipated, optimizing the heat conduction path and enhancing the cooling effect.

[0025] A cooling channel is provided between the heat exchange blind hole 3 and the liquid inlet pipe 44. The design of the cooling channel can effectively guide the flow of the cooling medium and ensure that it forms a uniform distribution in the heat exchange blind hole 3.

[0026] The upper and lower sides of the housing 11 are fixedly connected to the inner support plate 16. The inner support plate 16 enhances the overall structural strength of the housing 11 and provides stable support for the internal components.

[0027] Please see Figure 1 and Figure 5 The noise reduction component 5 includes a noise reduction housing 1 51 and a noise reduction housing 2 52. The noise reduction housing 1 51 and the noise reduction housing 2 52 are respectively movably snapped onto the left and right sides of the pump body housing 1. Sound-absorbing pads 53 are fixedly installed on the inner sides of both the noise reduction housing 1 51 and the noise reduction housing 2 52. A retaining plate 54 is fixedly connected to the upper and lower sides of the inner side of the noise reduction housing 1 51. A retaining groove 55 corresponding to the retaining plate 54 is opened on the inner side of the noise reduction housing 2 52. Fixing holes 56 are opened inside both the noise reduction housing 2 52 and the retaining plate 54. Fixing bolts 57 penetrating the fixing holes 56 are movably installed on the outer side of the noise reduction housing 2 52. The noise reduction housing 1 51 and... Noise-reducing shell 2 52 is snapped together from the left and right sides of the pump body shell 1. The locking plate 54 is inserted into the locking groove 55, so that noise-reducing shell 1 51 and noise-reducing shell 2 52 cover the outside of the pump body shell 1. After the fixing hole 56 on the locking plate 54 is aligned with the fixing hole 56 on the noise-reducing shell 2 52, the fixing bolt 57 is screwed into the fixing hole 56 to fix noise-reducing shell 1 51 and noise-reducing shell 2 52 to the outside of the pump body shell 1. The sound-absorbing pad 53 inside the noise-reducing shell 1 51 and noise-reducing shell 2 52 absorbs and blocks the noise generated by the pump body shell 1, thereby reducing noise diffusion, reducing noise, and ensuring user experience.

[0028] The inner sides of both noise reduction shell 1 51 and noise reduction shell 2 52 are provided with misalignment grooves corresponding to the support leg 6. The support leg 6 can be stably embedded in the misalignment groove, thereby enhancing the connection stability between noise reduction shell 1 51 and noise reduction shell 2 52 and the pump body shell 1, and ensuring the tight fit between noise reduction shell 1 51 and noise reduction shell 2 52.

[0029] The interior of noise reduction housing 1 51 and noise reduction housing 2 52 is provided with slots corresponding to the positions of inlet 14 and outlet 15. The slots enable the noise reduction housing 1 51 and noise reduction housing 2 52 to be accurately positioned during installation, ensuring that inlet 14 and outlet 15 are not blocked, thereby ensuring the normal operation of the pump body.

[0030] Working principle: During use, cooling medium is injected into the inlet pipe 44 through the inlet port 42 and then into the heat exchange blind hole 3 at the end of the inlet pipe 44. The heat generated by the rotor 2 is conducted to the cooling medium located in the heat exchange blind hole 3 for heat exchange. At the same time, the outer evaporation section of the flat heat pipe 46 embedded in the rotor 2 absorbs heat and is cooled by the inner condensation section, which conducts heat to the cooling medium in the heat exchange blind hole 3 for heat exchange. The cooling medium in the heat exchange blind hole 3 is discharged from the outlet port 43. The cooling medium flows in the heat exchange blind hole 3 to cool the rotor 2. At the same time, cooling medium is injected into the hollow cavity 12 through the inlet port 14. The cooling medium flows in the hollow cavity 12 along the spiral blades 13 and is discharged from the outlet port 15. The cooling medium conducts heat through the shell 11 to cool the pump body shell 1, thereby improving the cooling effect on the rotor 2.

[0031] Noise-reducing shell 1 51 and noise-reducing shell 2 52 are respectively engaged from the left and right sides of the pump body shell 1, so that the retaining plate 54 is inserted into the retaining groove 55, thereby covering the outside of the pump body shell 1 with noise-reducing shell 1 51 and noise-reducing shell 2 52. The fixing holes 56 on the retaining plate 54 are aligned with the fixing holes 56 on the noise-reducing shell 2 52, and the fixing bolts 57 are screwed into the fixing holes 56 to fix the noise-reducing shell 1 51 and noise-reducing shell 2 52 to the outside of the pump body shell 1. The sound-absorbing pads 53 inside the noise-reducing shell 1 51 and noise-reducing shell 2 52 block and absorb the noise generated by the pump body shell 1, thereby reducing the spread of noise, reducing noise, and ensuring the user experience. The above is the working process of the entire device. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw vacuum pump with a screw rotor cooling structure, comprising a pump housing (1) and a rotor (2) movably installed inside the pump housing (1), characterized in that: The rotor (2) has a heat exchange blind hole (3) inside. A cooling component (4) located outside the pump body shell (1) is movably installed at the end of the rotor (2). A noise reduction component (5) is movably installed on the outside of the pump body shell (1). A support leg (6) is fixedly installed at the bottom of the pump body shell (1). The pump body housing (1) includes a housing (11), and a hollow cavity (12) is provided inside the housing (11). Spiral blades (13) are fixedly installed at equal intervals inside the hollow cavity (12). The spiral blades (13) are fixedly installed at equal intervals inside the hollow cavity (12). An inlet (14) and an outlet (15) communicating with the hollow cavity (12) are fixedly installed at the top and bottom of the housing (11), respectively. The cooling assembly (4) includes a connector (41) which is movably sleeved on the outside of the rotor (2). The connector (41) has an inlet (42) and an outlet (43) inside. An inlet pipe (44) communicating with the inlet (42) is fixedly installed inside the connector (41). The inlet pipe (44) extends into the heat exchange blind hole (3). Flat heat pipes (46) are fixedly embedded in the rotor (2) at equal intervals.

2. A screw vacuum pump with a screw rotor cooling structure according to claim 1, characterized in that: The evaporation section of the flat heat pipe (46) is located on the outside, and the condensation section of the flat heat pipe (46) extends into the interior of the heat exchange blind hole (3).

3. A screw vacuum pump with a screw rotor cooling structure according to claim 1, characterized in that: A cooling channel is provided between the heat exchange blind hole (3) and the liquid inlet pipe (44).

4. A screw vacuum pump with a screw rotor cooling structure according to claim 3, characterized in that: The upper and lower sides inside the housing (11) are fixedly connected to an inner support plate (16).

5. A screw vacuum pump with a screw rotor cooling structure according to claim 1, characterized in that: The noise reduction component (5) includes a noise reduction shell one (51) and a noise reduction shell two (52). The noise reduction shell one (51) and the noise reduction shell two (52) are respectively movably snapped onto the left and right sides of the pump body shell (1). The inner sides of the noise reduction shell one (51) and the noise reduction shell two (52) are fixedly installed with sound-absorbing pads (53). The upper and lower sides of the inner side of the noise reduction shell one (51) are fixedly connected with clamping plates (54). The inner side of the noise reduction shell two (52) is provided with a clamping groove (55) corresponding to the clamping plate (54). The inner sides of the noise reduction shell two (52) and the clamping plate (54) are provided with fixing holes (56). The outer side of the noise reduction shell two (52) is movably installed with fixing bolts (57) that penetrate the fixing holes (56).

6. A screw vacuum pump with a screw rotor cooling structure according to claim 5, characterized in that: The inner sides of both the noise reduction shell one (51) and the noise reduction shell two (52) are provided with misalignment grooves corresponding to the support leg (6).

7. A screw vacuum pump with a screw rotor cooling structure according to claim 5, characterized in that: The interior of the noise reduction shell one (51) and noise reduction shell two (52) is provided with slots corresponding to the positions of the inlet (14) and outlet (15).

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