Roots vacuum pump

Abstract

The utility model discloses a Roots vacuum pump, which belongs to the technical field of vacuum pump cooling and comprises a pump body, a plurality of radiating fins for radiating the pump body are uniformly arranged on the outer side surface of the pump body, and cavities for placing cooling liquid for cooling the radiating fins are formed in the radiating fins. The cooling fins are each provided with a liquid inlet used for allowing cooling liquid to enter the cavity, the side face of the same cooling fin is provided with a plurality of nozzles used for allowing the internal cooling liquid to be sprayed out to cool the pump body, the pump body is wrapped with a shell used for preventing the cooling liquid from splashing, and the shell is provided with a liquid outlet used for discharging the cooling liquid. And efficient heat dissipation of the pump body can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pump cooling, and more specifically to a Roots vacuum pump. Background Art

[0002] Roots vacuum pump (abbreviated as: Roots pump) refers to a variable displacement vacuum pump that is equipped with two leaf-shaped rotors rotating synchronously in opposite directions, 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] The rotor of the existing pump body will generate more heat when working. The existing pump body will dissipate heat by transferring the heat to the outer shell, and dissipating the heat through the contact between the outer shell and the air. This heat dissipation efficiency is low, and it is easy for the heat to be discharged untimely, which can easily cause damage to the pump body and affect the working effect. A solution is proposed below to the above problems. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a Roots vacuum pump which can achieve efficient heat dissipation of the pump body.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A Roots vacuum pump comprises a pump body, wherein a plurality of heat dissipation fins for dissipating heat from the pump body are evenly arranged on the outer side surface of the pump body, a plurality of the heat dissipation fins are provided with cavities inside for placing coolant to cool the heat dissipation fins, the heat dissipation fins are respectively provided with liquid inlets for coolant to enter the cavity, a plurality of nozzles for spraying internal coolant to cool the pump body are provided on the side surface of the same heat dissipation fin, the outside of the pump body is wrapped with a shell for preventing coolant from splashing, and the shell is provided with a liquid outlet for discharging coolant.

[0007] Preferably, a main pipe is passed through one end of the shell, a branch pipe is arranged on the main pipe, the branch pipe is connected with the main pipe, and the branch pipe corresponds to and is connected with the liquid inlet.

[0008] Preferably, an atomizing nozzle is installed inside the nozzle.

[0009] Preferably, the liquid inlet is located at the bottom of the heat dissipation fin, the nozzle is located at the top of the heat dissipation fin, and three nozzles are provided on the same heat dissipation fin.

[0010] Preferably, the axis of the nozzle located in the middle among the three nozzles on the same heat dissipation fin is in a vertical state, and the two nozzles located at both ends of the same heat dissipation fin are respectively inclined to the two sides of the heat dissipation fin and form an angle of 5 degrees with the nozzle in the middle.

[0011] Preferably, the inner bottom surface of the housing is provided with an inclined surface to prevent coolant from gathering.

[0012] Preferably, the heat dissipating fins and the pump body are integrally formed.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] 1. This solution adopts adding heat dissipation fins to increase the contact surface between the pump body and the air through the heat dissipation fins, thereby improving the heat dissipation effect. At the same time, the cooling of the heat dissipation fins can be accelerated by passing coolant into the cavity inside the heat dissipation fins.

[0015] 2. The coolant inside the heat sink fins will be sprayed out through the nozzle, and the sprayed coolant will contact the outer shell, and then dispersed and fell on the pump body and the heat sink fins, thereby cooling the pump body. The coolant flows out through the liquid outlet under the action of gravity for easy collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front-view stereoscopic structural schematic diagram of the utility model;

[0017] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the utility model;

[0018] Figure 3 It is a schematic diagram of a cross-sectional structure of the utility model from a side view;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model in a front view;

[0020] Figure 5 It is a schematic diagram of the enlarged structure of A of the present utility model.

[0021] Description of the numbers in the figure:

[0022] 1. Pump body; 2. Cooling fins; 3. Cavity; 4. Liquid inlet; 5. Nozzle; 6. Shell; 7. Liquid outlet; 8. Main pipe; 9. Branch pipe; 10. Atomizing nozzle; 11. Inclined surface. DETAILED DESCRIPTION

[0023] Embodiment 1:

[0024] See also Figure 1-5A Roots vacuum pump comprises a pump body 1, wherein a plurality of heat dissipating fins 2 for dissipating heat from the pump body 1 are evenly arranged on the outer side of the pump body 1, the heat dissipating fins 2 and the pump body 1 are integrally formed to improve the heat transfer efficiency, a plurality of heat dissipating fins 2 are provided with cavities 3 for placing coolant to cool the heat dissipating fins 2, and the heat dissipating fins 2 are respectively provided with liquid inlets 4 for coolant to enter the cavity 3, and the liquid inlet 4 is located at the bottom of the heat dissipating fins 2, a main pipe 8 is provided on one side of the pump body 1, one end of the main pipe 8 is open, and the other end is sealed, a branch pipe 9 is provided on the main pipe 8, the branch pipe 9 and the main pipe 8 are connected to each other, and the branch pipe 9 corresponds to and is connected to the liquid inlet 4.

[0025] The open end of the main pipe 8 is connected to the output end of an external water pipe or other coolant, and the cooling fins 2 are cooled by the flowing coolant to improve the cooling effect.

[0026] The side of the same heat dissipation fin 2 is provided with three nozzles 5 for spraying internal coolant to cool the pump body 1. The nozzle 5 is located at the top of the heat dissipation fin 2. The upwardly arranged nozzle 5 can make the coolant hit the outer shell 6 after being sprayed, thereby expanding the contact surface with the pump body 1. The axis of the nozzle 5 located in the middle of the three nozzles 5 on the same heat dissipation fin 2 is in a vertical state. The two nozzles 5 located at both ends of the same heat dissipation fin 2 are respectively inclined to the two sides of the heat dissipation fin 2 and form an angle of 5 degrees with the nozzle 5 in the middle. The staggered arrangement of the nozzles 5 can further expand the contact area. An atomizing nozzle 10 is installed inside the nozzle 5. The outside of the pump body 1 is wrapped with an outer shell 6 to prevent the coolant from splashing. The open end of the main pipe 8 passes through the outer shell 6. The inner bottom surface of the outer shell 6 is provided with an inclined surface 11 to prevent the coolant from gathering. The outer shell 6 is provided with an outlet 7 for discharging the coolant.

[0027] Working principle:

[0028] When in use, the pump body 1 generates heat which will be transferred to the heat dissipation fins 2, thereby accelerating the cooling of the pump body 1. At the same time, the open end of the main pipe 8 is connected to the external water pipe, and the water pipe will transfer the coolant through each branch pipe 9 into each cavity 3, thereby cooling the heat dissipation fins 2 through the coolant. The liquid inlet 4 is located at the bottom of the heat dissipation fins 2 to ensure that the cavity 3 is full of coolant, ensuring the contact area between the coolant and the heat dissipation fins 2. After the coolant fills the cavity 3, it will be sprayed out from the atomizing nozzle 10 on the nozzle 5. The coolant sprayed from the atomizing nozzle 10 will hit the inside of the shell 6 and fall on the surface of the pump body 1 and the heat dissipation fins 2 under the action of gravity, further cooling the pump body 1. After the coolant on the surface of the main body has accumulated for a certain period of time, it will flow to the inner bottom surface of the shell 6 under the action of its own gravity, and finally flow out through the liquid outlet 7 guided by the inclined surface 11, realizing the flow of the coolant and ensuring the cooling effect of the coolant on the pump body 1.

Claims

1. A Roots vacuum pump, characterized in that: The invention comprises a pump body (1), wherein a plurality of heat dissipation fins (2) for dissipating heat from the pump body (1) are evenly arranged on the outer side surface of the pump body (1), a plurality of the heat dissipation fins (2) are provided with cavities (3) for placing coolant to cool the heat dissipation fins (2), the heat dissipation fins (2) are respectively provided with liquid inlets (4) for the coolant to enter the cavity (3), and a plurality of nozzles (5) for spraying the internal coolant to cool the pump body (1) are provided on the side surface of the same heat dissipation fin (2), the outside of the pump body (1) is wrapped with a shell (6) for preventing the coolant from splashing, and the shell (6) is provided with a liquid outlet (7) for discharging the coolant.

2. A Roots vacuum pump according to claim 1, characterized in that: A main pipe (8) is passed through one end of the housing (6), a branch pipe (9) is provided on the main pipe (8), the branch pipe (9) and the main pipe (8) are connected to each other, and the branch pipe (9) corresponds to and is connected to the liquid inlet (4).

3. A Roots vacuum pump according to claim 1, characterized in that: An atomizing nozzle (10) is installed inside the nozzle (5).

4. A Roots vacuum pump according to claim 1, characterized in that: The liquid inlet (4) is located at the bottom of the heat dissipation fin (2), the nozzle (5) is located at the top of the heat dissipation fin (2), and three nozzles (5) are provided on the same heat dissipation fin (2).

5. A Roots vacuum pump according to claim 1, characterized in that: The axis of the nozzle (5) located in the middle of the three nozzles (5) on the same heat dissipation fin (2) is in a vertical state, and the two nozzles (5) located at the two ends of the same heat dissipation fin (2) are respectively inclined to the two sides of the heat dissipation fin (2) and form an angle of 5 degrees with the nozzle (5) in the middle.

6. A Roots vacuum pump according to claim 1, characterized in that: The inner bottom surface of the housing (6) is provided with an inclined surface (11) for preventing coolant from gathering.

7. A Roots vacuum pump according to claim 1, characterized in that: The heat dissipation fins (2) and the pump body (1) are integrally formed.

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