Heat dissipation mechanism of vortex vacuum pump

Abstract

The utility model provides a vortex vacuum pump heat dissipation mechanism which comprises an end cover, a rotating shaft, a first fan arranged on the rotating shaft, a ventilation groove formed in the surface of the end cover, a fan cover and a ventilation hole formed in the fan cover and opposite to the ventilation groove, and a second fan coaxial with the first fan is further arranged in the fan cover. A heat dissipation air channel is formed between the ventilation hole and the ventilation groove, fan blades of the second fan are located in the heat dissipation air channel, and a driving assembly capable of driving the second fan to rotate to drive airflow in the heat dissipation air channel to move towards the ventilation hole is further arranged in the fan cover. In this way, the second fan can be additionally arranged on the basis of heat dissipation of the first fan, the second fan drives air in the heat dissipation air channel to flow through the driving assembly, the flowing speed of the air in the heat dissipation air channel can be further increased, the heat dissipation effect on the pump body is improved, and the heat dissipation efficiency is higher through the double-fan system.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump equipment technology, and in particular to a heat dissipation mechanism for a vortex vacuum pump. Background Technology

[0002] Oil-free scroll vacuum pumps generate a large amount of heat during operation, causing the pump body temperature to rise sharply. Therefore, a cooling device is needed to cool and dissipate heat from the pump body. Currently, all oil-free scroll vacuum pumps on the market are equipped with a heat dissipation device, which generally includes a fan blade and a fan blade cover. The outer surface of the end cover of the oil-free scroll vacuum pump has circumferential heat dissipation ribs. The fan blade is connected to the shaft of the oil-free scroll vacuum pump that extends out of the end cover. The fan blade cover covers the fan blade and is fixed to the heat dissipation ribs.

[0003] Currently, Chinese Patent Publication No. CN206600272U discloses an oil-free vortex vacuum pump, including a fan blade, a fan blade cover, an end cover, a rotating shaft, and an annular guide shroud. The end cover is provided with multiple circumferential ribs, and a ventilation groove is formed between every two adjacent ribs. One end of the rotating shaft is connected to the fan blade. The fan blade cover covers the fan blade and is provided with multiple first ventilation holes. The annular guide shroud is located inside the fan blade cover, and the lower end of the annular guide shroud presses on the ribs, while its upper end abuts against the inner wall of the fan blade cover. The multiple first ventilation holes are all located on the inner side of the annular guide shroud. The outer side of the ventilation groove is in communication with the outside air, and the inner side of the ventilation groove is in communication with the inner cavity of the fan blade cover through the opening in the middle of the annular guide shroud.

[0004] While this oil-free vortex vacuum pump can improve heat dissipation efficiency through an annular shroud, the device only dissipates heat through a single fan blade, resulting in limited heat dissipation effect. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a vortex vacuum pump heat dissipation mechanism to solve the problem of limited heat dissipation effect of vacuum pumps in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a vortex vacuum pump heat dissipation mechanism, including an end cover, a rotating shaft, a first fan mounted on the rotating shaft, a ventilation groove mounted on the surface of the end cover, a fan shroud, and ventilation holes mounted on the fan shroud opposite to the ventilation groove. A second fan coaxially mounted with the first fan is also provided inside the fan shroud. A heat dissipation channel is formed between the ventilation holes and the ventilation groove. The blades of the second fan are located inside the heat dissipation channel. A drive component capable of driving the second fan to rotate and causing the airflow in the heat dissipation channel to move toward the ventilation holes is also provided inside the fan shroud.

[0007] By adopting the above technical solution, a second fan can be added on the basis of the first fan for heat dissipation, and the second fan can drive the air flow in the heat dissipation duct through the drive component, which can further accelerate the air flow speed in the heat dissipation duct, thereby improving the heat dissipation effect on the pump body. The dual-fan system makes its heat dissipation efficiency higher.

[0008] In one embodiment of the present invention, the first fan includes a base plate, a shaft hole disposed on the base plate and connected to a rotating shaft, and centrifugal blades disposed on the base plate. The second fan includes a connecting shaft connected to a drive assembly, a support rod disposed radially on the connecting shaft, a support ring disposed at the end of the support rod, and blades evenly distributed on the support ring around the axis of the connecting shaft. The support rod extends to the outside of the base plate, and the connecting shaft is rotatably connected to the fan cover and coaxially disposed with the rotating shaft.

[0009] By adopting the above technical solution, the blades of the second fan can be located outside the first fan. The centrifugal blades of the first fan cause the gas to flow outward and enter the heat dissipation duct. Then, the second fan drives the gas to move towards the ventilation hole, which can accelerate and guide the gas in the fan shroud, thereby improving the heat dissipation effect.

[0010] In one embodiment of the present invention, the end cap is provided with a plurality of protrusions along the radial direction of the end cap, the protrusions are arranged around the axis of the end cap, and ventilation grooves are formed between adjacent protrusions.

[0011] By adopting the above technical solution, the through groove formed by the convex strips facilitates the flow of gas inside the fan cover, thereby increasing the gas flow speed and improving the heat dissipation effect.

[0012] In one embodiment of the present invention, the drive assembly includes a drive motor disposed on the outside of the wind shield and connected to the connecting shaft.

[0013] By adopting the above technical solution, the second fan shaft can be directly driven by the drive motor, the speed of the second fan can be freely controlled, and the heat dissipation effect is better.

[0014] In one embodiment of the present invention, the drive assembly includes a coupling connecting the rotating shaft and the connecting shaft.

[0015] By adopting the above technical solution, no additional power source is required. The connecting shaft and the rotating shaft can be rotated synchronously through the coupling, so that the rotating shaft can drive the first fan and the second fan to rotate at the same time. The structure is simple and the cost is lower.

[0016] In one embodiment of this utility model, the ventilation hole is configured as an elongated strip, the ventilation hole is located on the outside of the wind cover, the through hole is arranged opposite to the protrusion, and multiple ventilation holes are arranged evenly around the center of the wind cover.

[0017] By adopting the above technical solution, the elongated ventilation holes facilitate air flow and improve heat dissipation.

[0018] As described above, the vortex vacuum pump heat dissipation mechanism of this utility model has the following beneficial effects: it can set up a second fan on the basis of the first fan heat dissipation, and drive the second fan to drive the gas flow in the heat dissipation channel through the drive component, which can further accelerate the gas flow speed in the heat dissipation channel, thereby improving the heat dissipation effect on the pump body. The use of a dual-fan system makes its heat dissipation efficiency higher. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the overall structure disclosed in Embodiment 1 of this utility model.

[0020] Figure 2 The diagram shows the internal structure of the wind shield disclosed in Embodiment 1 of this utility model;

[0021] Figure 3 The diagram shown is a structural schematic of the second fan disclosed in Embodiment 1 of this utility model.

[0022] Component designation explanation

[0023] 1. End cap; 2. Shaft; 3. First fan; 4. Ventilation groove; 5. Fan cover; 6. Ventilation hole; 7. Drive assembly; 8. Second fan;

[0024] 20. Base plate; 21. Shaft hole; 22. Centrifugal blades;

[0025] 30. Connecting shaft; 31. Support rod; 32. Blade; 33. Support ring;

[0026] 40. Drive motor; 41. Raised bar. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figures 1 to 3It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0029] Example 1:

[0030] like Figure 1 , Figure 2 As shown, this embodiment provides a vortex vacuum pump heat dissipation mechanism, including an end cover 1, a rotating shaft 2, a first fan 3 disposed on the rotating shaft 2, a ventilation groove 4 disposed on the surface of the end cover 1, a fan shroud 5, and a ventilation hole 6 disposed on the fan shroud 5 opposite to the ventilation groove 4. A heat dissipation air duct is formed between the ventilation hole 6 and the through groove.

[0031] like Figure 3 As shown, the first fan 3 includes a base plate 20, a shaft hole 21 on the base plate 20 connected to the rotating shaft 2, and centrifugal blades 22 on the base plate 20. The base plate 20 is located away from the end cover 1, so that the centrifugal blades 22 face the surface of the end cover 1. The rotating shaft 2 can drive the second fan 8 to rotate. The centrifugal force generated by the high-speed rotation of the centrifugal blades 22 drives the gas to flow outward, and together with the ventilation groove 4, it plays a role in heat dissipation.

[0032] The fan cover 5 is also equipped with a second fan 8 that is coaxially arranged with the first fan 3. The blades of the second fan 8 are located in the heat dissipation duct. The fan cover 5 is also equipped with a drive component 7 that can drive the second fan 8 to rotate and drive the airflow in the heat dissipation duct to move toward the ventilation hole 6.

[0033] The second fan 8 includes a connecting shaft 30 connected to the drive assembly 7, a support rod 31 radially disposed on the connecting shaft 30, a support ring 33 disposed at the end of the support rod 31, and blades 32 evenly distributed on the support ring 33 around the axis of the connecting shaft 30. The support rod 31 extends to the outside of the base plate 20 so that the blades 32 are located outside the base plate 20. The blades 32 are inclined and can drive the connecting shaft 30 to rotate through the drive assembly 7, thereby driving the blades 32 to rotate around the axis of the connecting shaft 30. By tilting the blades 32, they generate an axial force along the connecting shaft 30, causing the gas in the heat dissipation duct to leave through the vent under the action of this force. The connecting shaft 30 is rotatably connected to the fan cover 5 and is coaxially disposed with the rotating shaft 2.

[0034] The drive assembly 7 includes a drive motor 40 located on the outside of the fan shroud 5 and connected to the connecting shaft 30. The drive motor 40 is located on the outside of the fan shroud 5, and the drive motor 40's conveyor shaft extends into the fan shroud 5 and is coaxially connected to the connecting shaft 30. The drive motor 40 directly drives the second fan 8 to rotate, and can control the speed and direction of the second fan 8.

[0035] The end cap 1 has multiple protrusions 41 arranged radially along the end cap 1. The protrusions 41 are arranged around the axis of the end cap 1, and ventilation grooves 4 are formed between adjacent protrusions 41.

[0036] The ventilation hole 6 is elongated and located on the outside of the hood 5. The through hole is opposite to the protrusion 41. Multiple ventilation holes 6 are arranged evenly around the center of the hood 5.

[0037] The ventilation groove 4 is connected to the outside, and the protrusion 41 has mounting holes. The fan cover 5 is installed on the protrusion 41 by fasteners.

[0038] Example 2:

[0039] The difference between the vortex vacuum pump cooling mechanism provided in this embodiment and that in Embodiment 1 is that the drive component in this embodiment includes a coupling connecting the rotating shaft and the connecting shaft, and the blades of the second fan are installed at the required angle. Other specific structures are as described in Embodiment 1.

[0040] A coupling can connect the rotating shaft and the connecting shaft, allowing the rotating shaft to directly drive the connecting shaft to rotate without the need for an additional drive source.

[0041] In summary, this utility model can additionally set a second fan 8 on the basis of the first fan 3 for heat dissipation, and drive the second fan 8 to drive the air flow in the heat dissipation channel through the drive component 7, which can further accelerate the air flow speed in the heat dissipation channel, thereby improving the heat dissipation effect on the pump body. The use of a dual-fan system makes its heat dissipation efficiency higher.

[0042] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A vortex vacuum pump heat dissipation mechanism, comprising an end cover, a rotating shaft, a first fan disposed on the rotating shaft, a ventilation groove disposed on the surface of the end cover, a fan shroud, and ventilation holes disposed on the fan shroud opposite to the ventilation groove, characterized in that, The shroud also contains a second fan coaxially arranged with the first fan. A heat dissipation channel is formed between the ventilation hole and the ventilation groove. The blades of the second fan are located in the heat dissipation channel. The shroud also contains a drive component that can drive the second fan to rotate and move the airflow in the heat dissipation channel toward the ventilation hole.

2. The vortex vacuum pump heat dissipation mechanism according to claim 1, characterized in that: The first fan includes a base plate, a shaft hole on the base plate connected to a rotating shaft, and centrifugal blades on the base plate. The second fan includes a connecting shaft connected to a drive assembly, a support rod radially disposed on the connecting shaft, a support ring disposed at the end of the support rod, and blades evenly distributed on the support ring around the axis of the connecting shaft. The support rod extends to the outside of the base plate, and the connecting shaft is rotatably connected to the fan cover and coaxially disposed with the rotating shaft.

3. The vortex vacuum pump heat dissipation mechanism according to claim 1, characterized in that: The end cap has multiple raised strips arranged radially along the end cap, and the raised strips are arranged around the axis of the end cap, forming ventilation grooves between adjacent raised strips.

4. The vortex vacuum pump heat dissipation mechanism according to claim 1, characterized in that: The drive assembly includes a drive motor disposed on the outside of the windshield and connected to the connecting shaft.

5. The vortex vacuum pump heat dissipation mechanism according to claim 1, characterized in that: The drive assembly includes a coupling that connects the rotating shaft and the connecting shaft.

6. The vortex vacuum pump heat dissipation mechanism according to claim 1, characterized in that: The ventilation holes are elongated and located on the outside of the hood. The ventilation holes are positioned opposite to the raised strips, and there are multiple ventilation holes evenly arranged around the center of the hood.

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