CN211230837U - Oil return preventing mechanism for air inlet of vacuum pump - Google Patents
Oil return preventing mechanism for air inlet of vacuum pump Download PDFInfo
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- CN211230837U CN211230837U CN201922189258.1U CN201922189258U CN211230837U CN 211230837 U CN211230837 U CN 211230837U CN 201922189258 U CN201922189258 U CN 201922189258U CN 211230837 U CN211230837 U CN 211230837U
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- air inlet
- oil
- vacuum pump
- oil duct
- valve plate
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Abstract
The utility model discloses an anti-mechanism of returning oil of vacuum pump air inlet locates the air inlet department of vacuum pump, its characterized in that: including air inlet interface, prevent oil return valve plate, vertical oil duct, horizontal oil duct, seal assembly, horizontal oil duct and vertical oil duct intercommunication, seal assembly sets up in horizontal oil duct inboard, prevent that oil return valve plate includes the cylinder end of bottom and the disc end at top, is equipped with a circular shape recess around the upper surface of disc end, is equipped with first sealing washer in this recess, the air inlet department of vacuum pump is located to the air inlet interface, and the air inlet interface forms the chamber of admitting air with preventing between the oil return valve plate, the chamber of admitting air is equipped with inlet channel and pump chamber intercommunication, the utility model discloses simple structure, it is longe-lived, prevent that oil return is effectual.
Description
Technical Field
The utility model relates to a technical field of vacuum pump specifically is a mechanism is prevented returning oil by vacuum pump air inlet.
Background
The vacuum pump is a device or equipment for extracting air in a container to form vacuum, and compresses the air by utilizing high-speed rotation of a rotor in a pump body, so that the air in the container is extracted into the vacuum pump, the vacuum pump is the same as an engine, a lot of lubricating oil is arranged in the pump body in order to ensure normal work of the rotor, after the vacuum pump stops working, an oil return prevention mechanism is required to be arranged at an air inlet of the vacuum pump due to the fact that the oil return prevention mechanism can generate oil return phenomenon due to the change of internal pressure, the existing oil return prevention mechanism is realized by adopting an elastic component, the structure is complex, and after the vacuum pump is used for a long time, the elastic component is easy to age or the metal of a product is fatigued to reduce the.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art, the utility model provides a vacuum pump air inlet prevents oily mechanism of returning has solved the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides an anti-oil return mechanism of vacuum pump air inlet, locates the air inlet department of vacuum pump, includes air inlet interface, prevents oil return valve plate, vertical oil duct, horizontal oil duct, seal assembly, horizontal oil duct and vertical oil duct intercommunication, seal assembly set up in horizontal oil duct inboard, prevent that oil return valve plate includes the cylinder end of bottom and the disc end at top, is equipped with a circular shape recess around the upper surface of disc end, is equipped with first sealing washer in this recess, air inlet department of vacuum pump is located to the air inlet interface, forms the chamber of admitting air between air inlet interface and the anti-oil return valve plate, the chamber of admitting air is equipped with inlet channel and pump chamber intercommunication.
Preferably, the sealing assembly comprises a sealing piston, a piston spring and a piston top, the sealing piston is connected with the piston top and is arranged in the transverse oil duct, a spring clamping groove is formed in the periphery of the transverse oil duct, the piston spring is arranged in the spring clamping groove, and the outer end of the piston spring is connected with the piston top.
Preferably, an annular groove is formed in the inner end of the air inlet port, and a second sealing ring is arranged in the annular groove.
Preferably, the diameter of the sealing piston matches the transverse oil passage.
Preferably, when the anti-oil return valve plate rises to abut against the air inlet interface, the cylindrical end of the anti-oil return valve plate cannot fall out of the longitudinal oil passage.
Preferably, the diameter of the cylindrical end of the oil return prevention valve plate is matched with the longitudinal oil passage.
The utility model provides an oil return preventing mechanism is prevented to vacuum pump air inlet possesses following beneficial effect: through setting up the anti-oil valve board that prevents, prevent that the oil valve board descends when admitting air, the air gets into the chamber of admitting air from the air inlet interface, rethread admission passage gets into the pump intracavity, when the vacuum pump stop work, because the pressure resumes normally in the pump chamber, the piston spring bounces the piston top, the horizontal oil duct is deviate from to sealed piston, oil in the pump chamber gets into in the oil duct will prevent the oil valve board that prevents and push up, prevent that the oil valve board seals the air inlet interface, oil is also restricted in the oil duct, moreover, the steam generator is simple in structure, long service life, it is effectual to prevent oil.
Drawings
FIG. 1 is a schematic view of a vacuum pump;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in the figure, the utility model provides a technical scheme: an oil return preventing mechanism of an air inlet of a vacuum pump is arranged at an air inlet of a vacuum pump 1 and comprises an air inlet interface 3, an oil return preventing valve plate 4, a longitudinal oil duct 12, a transverse oil duct 11 and a sealing assembly, wherein the transverse oil duct 11 is communicated with the longitudinal oil duct 12, the sealing assembly is arranged on the inner side of the transverse oil duct 11, the oil return preventing valve plate 4 comprises a bottom cylindrical end 13 and a top disc end 14, a circular groove is arranged around the upper surface of the disc end 14, a first sealing ring 15 is arranged in the groove, the air inlet interface 3 is arranged at the air inlet of the vacuum pump 1, an air inlet cavity 16 is formed between the air inlet interface 3 and the oil return preventing valve plate 4, the air inlet cavity 16 is provided with an air inlet channel 5 communicated with a pump cavity 6, the sealing assembly comprises a sealing piston 10, a piston spring 9 and a piston top 7, the sealing piston 10 is connected with the piston top 7 and, the periphery of the transverse oil duct 11 is provided with a spring clamping groove 8, the piston spring 9 is arranged in the spring clamping groove 8, the outer end of the piston spring 9 is connected with a piston top 7, the inner end of the air inlet interface 3 is provided with an annular groove, a second sealing ring 17 is arranged in the annular groove, the diameter of the sealing piston 10 is matched with that of the transverse oil duct 11, when the anti-reverse oil valve plate 4 rises to abut against the air inlet interface 3, the cylindrical end 13 of the anti-reverse oil valve plate cannot be separated from the longitudinal oil duct 12, and the diameter of the cylindrical end 13 of the anti-reverse oil valve plate 4 is matched.
The utility model discloses a set up at the vacuum pump air inlet and prevent the oil return valve board, prevent the decline of oil return valve board when admitting air, the air gets into the chamber of admitting air from the air inlet interface, rethread admission passage gets into the pump intracavity, when the vacuum pump stop work, because the pressure resumes normally in the pump chamber, piston spring pops open the piston top, the horizontal oil duct is deviate from to sealed piston, will prevent the oil return valve board and push up in the oil entering oil duct in the pump chamber, it seals the air inlet interface to prevent the oil return valve board, oil is also restricted in the oil duct, moreover, the steam generator is simple in structure, long service life, it is effectual to prevent the oil return.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides an anti-oil return mechanism of vacuum pump air inlet, locates the air inlet department of vacuum pump, its characterized in that: including air inlet interface, anti-oil return valve plate, longitudinal oil duct, transverse oil duct, seal assembly, transverse oil duct and longitudinal oil duct intercommunication, seal assembly set up in the transverse oil duct inboard, the anti-oil return valve plate includes the cylinder end of bottom and the disc end at top, is equipped with a circular shape recess around the upper surface of disc end, is equipped with first sealing washer in this recess, the air inlet department of vacuum pump is located to the air inlet interface, forms the air inlet chamber between air inlet interface and the anti-oil return valve plate, the air inlet chamber is equipped with inlet channel and pump chamber intercommunication.
2. The vacuum pump air inlet anti-oil-return mechanism according to claim 1, characterized in that: the sealing assembly comprises a sealing piston, a piston spring and a piston top, the sealing piston is connected with the piston top and arranged in the transverse oil duct, a spring clamping groove is formed in the periphery of the transverse oil duct, the piston spring is arranged in the spring clamping groove, and the outer end of the piston spring is connected with the piston top.
3. The vacuum pump air inlet anti-oil-return mechanism according to claim 1, characterized in that: an annular groove is formed in the inner end of the air inlet connector, and a second sealing ring is arranged in the annular groove.
4. The vacuum pump air inlet anti-oil-return mechanism according to claim 2, characterized in that: the diameter of the sealing piston is matched with the transverse oil passage.
5. The vacuum pump air inlet anti-oil-return mechanism according to claim 1, characterized in that: when the anti-oil return valve plate rises to push against the air inlet interface, the cylindrical end of the anti-oil return valve plate cannot be separated from the longitudinal oil duct.
6. A vacuum pump air intake anti-oil-return mechanism according to claim 5, characterized in that: the diameter of the cylindrical end of the anti-oil return valve plate is matched with the longitudinal oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922189258.1U CN211230837U (en) | 2019-12-07 | 2019-12-07 | Oil return preventing mechanism for air inlet of vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922189258.1U CN211230837U (en) | 2019-12-07 | 2019-12-07 | Oil return preventing mechanism for air inlet of vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211230837U true CN211230837U (en) | 2020-08-11 |
Family
ID=71925041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922189258.1U Active CN211230837U (en) | 2019-12-07 | 2019-12-07 | Oil return preventing mechanism for air inlet of vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211230837U (en) |
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2019
- 2019-12-07 CN CN201922189258.1U patent/CN211230837U/en active Active
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