Vacuum pump

Abstract

The utility model discloses a vacuum pump. The vacuum pump comprises a power source; a pump body is arranged in the machine shell, an inlet and an outlet are formed in the machine shell, the machine shell is connected with the power source, and the power source drives the pump body to achieve one-way flowing of fluid from the inlet to the outlet; the machine shell is provided with a pressure relief channel communicating the inside and the outside, the machine shell is movably connected with an adjusting part, and the through-flow area of the pressure relief channel is adjusted through the adjusting part. When the vacuum pump carries out suction operation, the through-flow area of the pressure relief channel can be adjusted by adjusting the position of the adjusting part, once the interior of the machine shell is communicated with the external environment through the pressure relief channel, suction force of the vacuum pump can be shared by the pressure relief channel, and therefore the suction force of the vacuum pump can be adjusted. Therefore, the suction force of the vacuum pump can be accurately controlled by adjusting the position of the adjusting part so as to replace an adjusting scheme for operating parameters of a power source in the prior art, and the purpose of noise reduction can be achieved through pressure division.

Description

Technical Field

[0001] The utility model relates to the technical field of positive displacement pumps, and particularly relates to a vacuum pump. Background Art

[0002] For the existing vacuum pumps, their negative pressure suction can only be adjusted by changing the operating parameters of the driving device, which requires a high control requirement for the driving device, and it is difficult to limit the pressure regulating range within a relatively narrow numerical range, making it inconvenient for fine adjustment. Summary of the Utility Model

[0003] The utility model aims to provide a vacuum pump with fine pressure regulation.

[0004] The vacuum pump according to the first aspect embodiment of the utility model includes:

[0005] A power source;

[0006] A housing, inside which a pump body is provided. The housing is provided with an inlet and an outlet, and the housing is connected to the power source. The power source drives the pump body to realize the one-way flow of fluid from the inlet to the outlet; the housing is provided with a pressure relief channel communicating with the inside and outside, and the housing is movably connected with an adjusting part, and the flow area of the pressure relief channel is adjusted by the adjusting part.

[0007] The vacuum pump according to the embodiment of the utility model has at least the following beneficial effects: Since the housing is provided with a pressure relief channel communicating with the inside and outside in addition to the inlet and the outlet, when the vacuum pump is performing a suction operation, the flow area of the pressure relief channel can be adjusted by adjusting the position of the adjusting part. Once the inside of the housing is conducted to the outside environment through the pressure relief channel, the suction force of the vacuum pump will be shared by the pressure relief channel. The larger the flow area of the pressure relief channel, the more suction force it shares, and vice versa. Therefore, the suction force of the vacuum pump can be accurately controlled by adjusting the position of the adjusting part, so as to replace the adjustment scheme of the operating parameters of the power source in the prior art, greatly reducing the cost of the power source, and achieving the purpose of noise reduction through pressure sharing.

[0008] According to some embodiments of the present utility model, due to the high adjustment precision of the thread, the adjustment part is threadedly connected to the pressure relief passage. When the adjustment part gradually moves away from the interior of the casing through threaded connection, since the number of mutually engaged thread teeth gradually decreases, the fluid inside the casing can more easily escape to the outside world. Therefore, the amount of fluid escaping per unit time increases, which means it plays a role in increasing the flow area of the pressure relief passage; when the adjustment part gradually approaches the interior of the casing through threaded connection, since the number of mutually engaged thread teeth gradually increases, the fluid inside the casing is more difficult to escape to the outside world. Therefore, the amount of fluid escaping per unit time decreases, which means it plays a role in reducing the flow area of the pressure relief passage.

[0009] According to some embodiments of the present utility model, in order to keep the outer surface of the casing flat, a groove is provided on the surface of the casing, and the pressure relief passage and the groove together form a counterbore. No matter how the adjustment part moves, it never exceeds the groove.

[0010] According to some embodiments of the present utility model, the casing is provided with a pressure relief hole communicating with the pressure relief passage, and the moving path of the adjustment part covers the pressure relief hole. Through the above settings, when the adjustment part gradually moves away from the interior of the casing through threaded connection, at this time the pressure relief hole is gradually opened to gradually increase the flow area of the pressure relief hole; when the adjustment part gradually approaches the interior of the casing through threaded connection, at this time the pressure relief hole is gradually closed to gradually reduce the flow area of the pressure relief hole.

[0011] According to some embodiments of the present utility model, a clearance groove is reserved between the casing and the power source, and the pressure relief hole communicates with the clearance groove to ensure the normal pressure relief of the fluid inside the casing.

[0012] According to some embodiments of the present utility model, the casing is detachably connected with a shielding part covering the groove. Since the pressure relief hole is more conducive to the pressure relief of the fluid relative to the pressure relief passage, the fluid inside the casing generally relieves pressure through the pressure relief hole. Therefore, the appearance beauty of the vacuum pump can be improved by setting the shielding part, and the adjustment part can be better protected.

[0013] According to some embodiments of the present utility model, both the inlet and the outlet are provided with connectors to facilitate docking with pipelines.

[0014] According to some embodiments of the present utility model, both the inlet and the outlet are located on the same side of the casing to meet specific assembly requirements.

[0015] According to some embodiments of the present utility model, the inlet and the outlet are located on different sides of the casing respectively to meet specific assembly requirements.

[0016] According to some embodiments of the present utility model, preferably, the power source is an electric motor.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0019] Figure 1 is a cross-sectional view of the vacuum pump according to the first embodiment of the present utility model;

[0020] Figure 2 is a cross-sectional view of the vacuum pump according to the second embodiment of the present utility model.

[0021] In the drawings: 100 - power source, 200 - housing, 300 - pump body, 110 - main shaft, 210 - inlet, 220 - outlet, 201 - connector, 400 - pressure relief passage, 500 - adjustment part, 410 - pressure relief hole, 420 - groove, 600 - shielding part, 411 - clearance groove. Detailed Description of the Embodiments

[0022] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0024] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or the sequence relationship of the indicated technical features.

[0025] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" shall be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0026] As Figure 1 shown, the vacuum pump according to the first aspect embodiment of the present utility model includes a power source 100, a housing 200, and a pump body 300. In this embodiment, the power source 100 can be selected as an electric motor, which is provided with a rotatable main shaft 110. The power source 100 is connected to the bottom surface of the housing 200 by screws, and its main shaft 110 extends into the interior of the housing 200. The housing 200 is assembled from multiple components, and is provided with an inlet 210 and an outlet 220, and both the inlet 210 and the outlet 220 are provided with connectors 201 to achieve quick insertion of pipelines.

[0027] The pump body 300 is installed inside the housing 200, and the pump body 300 is driven by the power source 100. The power source 100 drives the pump body 300 to achieve the unidirectional flow of fluid from the inlet 210 to the outlet 220. Although the pump body 300 is the core execution mechanism of the vacuum pump, since the present utility model does not improve its structure, the structure of the pump body 300 can follow that of "An Air Pump" with the publication number CN208534705U, "A Vacuum Air Pump" with the publication number CN208380811U, or "A Constant Flow Micro Pump" with the publication number CN215409125U. Therefore, the specific structure of the pump body 300 will not be described in detail here.

[0028] It can be understood that both the inlet 210 and the outlet 220 can be arranged on the same side of the housing 200, or can be respectively arranged on different sides of the housing 200. Users can select a vacuum pump with different inlet and outlet schemes according to the space assembly requirements of their products to optimize the pipeline layout of the products and facilitate the later maintenance and servicing of the products.

[0029] To achieve the purpose of regulating pressure, the casing 200 is provided with a pressure relief channel 400 that communicates with the inside and outside. That is to say, on the basis of the prior art, the present utility model adds a pressure relief station. Although this will reduce the internal pressure of the vacuum pump to a certain extent, it also makes the pressure of the vacuum pump adjustable. To adjust the flow area of the pressure relief channel 400, the casing 200 is movably connected with an adjustment part 500. Since the adjustment accuracy of the thread is relatively high and it has the advantage of stepless adjustment, in this embodiment, the adjustment part 500 can be selected as an adjustment screw, which is threadedly connected in the pressure relief channel 400. In addition, the casing 200 is provided with a pressure relief hole 410 that communicates with the pressure relief channel 400, and the pressure relief hole 410 communicates with the outside, and the moving path of the adjustment screw covers the pressure relief hole 410. When the adjustment part 500 gradually moves away from the inside of the casing 200 through threaded connection, at this time the pressure relief hole 410 is gradually opened to gradually increase the flow area of the pressure relief hole 410; when the adjustment part 500 gradually approaches the inside of the casing 200 through threaded connection, at this time the pressure relief hole 410 is gradually closed to gradually reduce the flow area of the pressure relief hole 410.

[0030] It should be noted that although both the pressure relief channel 400 and the pressure relief hole 410 communicate with the outside, since the adjustment part 500 is threadedly connected in the pressure relief channel 400, the adjustment part 500 hinders the process of fluid escaping from the pressure relief channel 400 to the outside, and the fluid instead escapes to the outside from the pressure relief hole 410. That is to say, in this embodiment, the pressure relief hole 410 replaces the pressure relief channel 400 as the main pressure relief port.

[0031] With the above structure, since in addition to the inlet 210 and the outlet 220, the housing 200 is also provided with a pressure relief channel 400 and a pressure relief hole 410 that communicate the inside and the outside, when the vacuum pump is performing a suction operation, the flow area of the pressure relief hole 410 can be adjusted by adjusting the position of the adjusting part 500. Once the inside of the housing 200 is communicated with the external environment through the pressure relief hole 410, the suction force of the vacuum pump will be shared by the pressure relief hole 410. The larger the flow area of the pressure relief hole 410, the more suction force it shares, and vice versa. Therefore, the suction force of the vacuum pump can be accurately controlled by adjusting the position of the adjusting part 500, so as to replace the adjustment scheme of the operating parameters of the motor in the prior art, greatly reduce the cost of the motor, and achieve the purpose of noise reduction through voltage division. If you want to adjust the operating parameters of the motor, a driver needs to be set and there are certain technical requirements for the motor. However, the present utility model adopts a more simple way to adjust the suction force of the vacuum pump. Not only is the accuracy of the screw adjustment high and it has the advantage of stepless adjustment, but also an ordinary motor can be used to reduce the production cost.

[0032] In some embodiments of the present utility model, in order to keep the outer surface of the housing 200 flat, a groove 420 is provided on the surface of the housing 200. The size of the groove 420 is larger than the size of the pressure relief channel 400, so that the groove 420 and the pressure relief channel 400 can jointly form a countersunk hole. No matter how the adjusting part 500 moves, it never exceeds the groove 420, avoiding scratching with other components in the product.

[0033] Furthermore, the housing 200 is detachably connected with a shielding part 600 covering the groove 420. The shielding part 600 can be selected as a rubber cover sheet. By setting the shielding part 600, the appearance beauty of the vacuum pump is improved, and the screw head of the adjusting part 500 is better protected.

[0034] In some embodiments of the present utility model, a clearance groove 411 is reserved between the housing 200 and the power source 100. The pressure relief hole 410 communicates with the clearance groove 411 to ensure the normal pressure relief of the fluid in the housing 200. Moreover, since the position of the clearance groove 411 is between the housing 200 and the power source 100, the pressure relief port can be hidden to reduce the influence of the fluid during pressure relief on other components of the product.

[0035] Such as Figure 2As shown, this is the second embodiment of the present utility model. The main difference from the previous embodiment is that the housing 200 no longer has the pressure relief hole 410 and the clearance groove 411. At this time, the countersunk hole becomes the main pressure relief port. When the adjusting part 500 gradually moves away from the inside of the housing 200 through threaded connection, since the number of engaged screw threads gradually decreases, the fluid inside the housing 200 can more easily escape to the outside. Therefore, the amount of fluid escaping per unit time increases, that is, it plays a role in increasing the flow area of the pressure relief passage 400; when the adjusting part 500 gradually approaches the inside of the housing 200 through threaded connection, since the number of engaged screw threads gradually increases, the fluid inside the housing 200 is more difficult to escape to the outside. Therefore, the amount of fluid escaping per unit time decreases, that is, it plays a role in reducing the flow area of the pressure relief passage 400.

[0036] It should be noted that since the countersunk hole becomes the main pressure relief port, the housing 200 cannot be connected with a shielding part 600 covering the groove 420 to avoid blockage. However, in some other embodiments, as long as the shielding part 600 has holes, it can also cover the groove 420.

[0037] Of course, the present utility model does not limit the specific structure of the pressure relief part of the vacuum pump. In addition to the above two embodiments, those skilled in the art can also select other different pressure relief structures according to the requirements of pressure relief. As long as the pressure relief structure has the function of adjusting the pressure of the vacuum pump, no matter what structure the pressure relief structure is, it belongs to the protection scope of the present utility model.

[0038] The embodiments of the present utility model have been described in detail above with reference to the drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. A vacuum pump, characterized in that include: Power Source (100); A casing (200) is provided with a pump body (300) therein; the casing (200) is provided with an inlet (210) and an outlet (220); the casing (200) is connected to the power source (100); the power source (100) drives the pump body (300) to achieve a unidirectional flow of fluid from the inlet (210) to the outlet (220); the casing (200) is provided with a pressure relief channel (400) communicating with the inside and outside; the casing (200) is movably connected with an adjustment portion (500); and the flow area of ​​the pressure relief channel (400) is adjusted by the adjustment portion (500).

2. The vacuum pump according to claim 1, characterized in that: The adjusting portion (500) is threadedly connected to the pressure relief channel (400).

3. The vacuum pump according to claim 2, characterized in that: A groove (420) is provided on the surface of the housing (200), and the pressure relief channel (400) and the groove (420) together form a countersunk hole.

4. The vacuum pump according to claim 3, characterized in that: The housing (200) is provided with a pressure relief hole (410) connected to the pressure relief channel (400), and the moving path of the adjustment part (500) covers the pressure relief hole (410).

5. The vacuum pump according to claim 4, characterized in that: An air avoidance groove (411) is reserved between the housing (200) and the power source (100), and the pressure relief hole (410) is connected to the air avoidance groove (411).

6. The vacuum pump according to claim 4, characterized in that: The housing (200) is detachably connected to a shielding portion (600) covering the groove (420).

7. The vacuum pump according to claim 1, characterized in that: The inlet (210) and the outlet (220) are both provided with a connector (201).

8. The vacuum pump according to claim 7, characterized in that: The inlet (210) and the outlet (220) are both located on the same side of the housing (200).

9. The vacuum pump according to claim 7, characterized in that: The inlet (210) and the outlet (220) are respectively located on different sides of the housing (200).

10. The vacuum pump according to claim 1, characterized in that: The power source (100) is an electric motor.

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