Self-lubricating vacuum pump main machine

Abstract

The utility model relates to a self-lubricating vacuum pump main machine which comprises a pump main machine shell and a rotor assembly arranged in the pump main machine shell, the rotor assembly comprises a driving rotor and a driven rotor, the axes of the driving rotor and the driven rotor are arranged in parallel, and a main oil tank cover is further installed on the outer side of a first end cover of the pump main machine shell. One end of the driving rotor shaft penetrates out of the main oil tank cover, and an oil flinger is installed on the section, located in the main oil tank, of the driving rotor shaft. And a plurality of oil storage concave parts communicated with the main oil tank are formed on the outer wall of the first end cover. By adopting the structure, the length and the volume of the main machine can be reduced on the premise of not influencing the lubricating oil storage space and the size of the main shell; the fluidity of the lubricating oil can be enhanced through the oil flinger, so that the lubricating oil fully participates in lubrication, the heat dissipation effect can be enhanced, the service life of the lubricating oil can be prolonged, and the equipment maintenance frequency and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pump equipment, in particular to a self-lubricating vacuum pump host. Background Art

[0002] The outer side of the two end walls of the screw vacuum pump main unit is equipped with bearings for mounting the rotor shaft, and the tail end is also connected to intermeshing gears. Therefore, oil tank caps are required on both sides of the end walls to store lubricating oil. In the prior art, in order to ensure a certain amount of oil storage space, the oil tank caps are often designed to be relatively wide along the axial direction. That is, the inner depth of each oil tank cap is 5-7cm, and the axial length is often more than 6cm, making the overall length of the main unit longer. On the other hand, the lubricating oil in the oil tank of the prior art has poor fluidity, making it difficult to fully participate in lubrication, thereby shortening the service life of the lubricating oil and reducing the lubrication effect. In addition, too much lubricating oil should not be too much, as it can easily lead to problems such as untimely heat dissipation. Untimely heat dissipation can easily lead to a series of problems such as reduced equipment power, increased energy consumption, accelerated coil aging, and thus increased equipment maintenance costs. Utility Model Content

[0003] The utility model aims to solve the above problems and provide a self-lubricating vacuum pump host.

[0004] The utility model is realized through the following technical solutions: a self-lubricating vacuum pump main unit, comprising a pump main unit housing and a rotor assembly arranged in the pump main unit housing, the rotor assembly comprising an active rotor and a driven rotor whose axes are arranged in parallel, both ends of the active rotor shaft and the driven rotor shaft are respectively mounted on the two end covers of the pump main unit housing through bearings, and the bearings are both located on the outer sides of the end covers, the ends of the active rotor shaft and the driven rotor shaft respectively pass through the end covers and engage through gears, a main oil tank cover is also installed on the outer side of the first end cover of the pump main unit housing, and an auxiliary oil tank cover is installed on the outer side of the second end cover; a main oil tank is formed between the main oil tank cover and the first end cover, and an auxiliary oil tank is formed between the auxiliary oil tank cover and the second end cover; one end of the active rotor shaft passes through the main oil tank cover, and an oil-slinging pan is installed on a section of the active rotor shaft located in the main oil tank; a plurality of oil storage recesses connected to the main oil tank are formed on the outer wall of the first end cover.

[0005] The axial inner depth of the main fuel tank cover is 2-3 cm, and the axial width of the main fuel tank cover is 3-4.5 cm.

[0006] Bearing temperature sensors for measuring bearing temperature are respectively installed on both sides of the first end cover; an oil temperature sensor for measuring oil temperature is also provided at the bottom of the first end cover.

[0007] The ends of the driving rotor shaft and the driven rotor shaft located in the auxiliary oil tank are respectively connected to helical gears, and the two helical gears are meshed with each other.

[0008] The self-lubricating vacuum pump main unit of the present invention adopts the above-mentioned structure. On the one hand, it can reduce the length and volume of the main unit without affecting the lubricating oil storage space and the size of the main housing; on the other hand, the fluidity of the lubricating oil can be enhanced through the oil-slinging plate, so that the lubricating oil can fully participate in lubrication and enhance the heat dissipation effect, thereby extending the service life of the lubricating oil and reducing the frequency and cost of equipment maintenance; at the same time, oil temperature and bearing temperature sensors are also provided to protect the equipment from overtemperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a three-dimensional diagram of the main pump of the utility model;

[0010] Figure 2 It is a schematic diagram of the plane structure of the utility model;

[0011] Figure 3 、 Figure 4 They are Figure 2 AA and BB cross-sectional views. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to specific examples and accompanying drawings.

[0013] like Figure 1-Figure 4 As shown, the self-lubricating vacuum pump main unit of the present invention includes a pump main unit housing 1 and a rotor assembly 2 disposed within the pump main unit housing 1. The rotor assembly 2 includes a driving rotor 21 and a driven rotor 22 whose axes are arranged in parallel. Both ends of the driving rotor shaft 210 and the driven rotor shaft 220 are respectively mounted on the end covers of the pump main unit housing 1 through bearings 3, and the bearings 3 are both located on the outer side of the end covers. The ends of the driving rotor shaft 210 and the driven rotor shaft 220 respectively pass through the end covers and are engaged by gears (helical gears 4 in this embodiment). A main oil tank cover 5 is also mounted on the outer side of the first end cover 11 of the pump main unit housing 1, and an auxiliary oil tank cover 6 is mounted on the outer side of the second end cover 12. ; A main oil tank 50 is formed between the main oil tank cover 5 and the first end cover 11, and an auxiliary oil tank 60 is formed between the auxiliary oil tank cover 6 and the second end cover 12; the bearings of the active rotor shaft 210 and the driven rotor shaft 220 are respectively located at positions communicating with the main oil tank 50 and the auxiliary oil tank 60, that is, the lubricating oil in the main oil tank 50 and the auxiliary oil tank 60 can directly contact the bearing 3; one end of the active rotor shaft 210 passes through the main oil tank cover 5 to be connected to the rotor of the drive motor, and an oil-slinging pan 211 is installed on a section of the active rotor shaft 210 located in the main oil tank 50; a plurality of oil storage recesses 111 communicating with the main oil tank 50 are formed on the outer wall of the first end cover 11.

[0014] Through the design of the oil storage recess 111, the axial width of the main oil tank cover 5 can be reduced, and the length of the main engine can be reduced without reducing the oil storage space; through the oil-slinging plate 211, when the active rotor shaft 210 is driven to rotate by the external motor, no additional power is required, and the lubricating oil in the inner corners of the main oil tank 50 and the oil storage recess 111 of the first end cover 11 can flow under the disturbance of the oil-slinging plate 211, and participate as fully as possible in the dynamic lubrication process, so as to avoid uneven temperature of the lubricating oil in the main oil tank, which can not only improve the lubrication effect and heat dissipation effect, but also extend the service life of the lubricating oil and reduce the equipment maintenance cost.

[0015] The oil-slinging plate 211 is formed with slightly raised disturbance blades on the side facing the end cover, which has a better disturbance effect, so that the lubricating oil accumulated in the recessed part 111 of the end cover can flow better to participate in lubrication and heat exchange, thereby improving the lubrication and heat dissipation effect of the main oil tank.

[0016] The axial inner depth of the main oil tank cover 5 is 2-3 cm, and the axial width of the main oil tank cover 5 is 3-4.5 cm. Compared with the oil tank cover of more than 6 cm in the prior art, the length and volume of the pump host are reduced while ensuring sufficient oil storage space.

[0017] Bearing temperature sensors 112 for measuring the bearing temperature are also installed on both sides of the first end cover 11; an oil temperature sensor 113 for measuring the oil temperature is also provided at the bottom of the first end cover 11; the bearing temperature sensor 112 can instantly detect the temperature of the bearing 3, and the oil temperature sensor 113 can instantly detect the oil temperature in the main oil tank 50. When the temperature is too high, the load can be reduced, the power can be lowered, or the machine can be automatically shut down to protect the equipment.

[0018] The ends of the driving rotor shaft 210 and the driven rotor shaft 220 located in the auxiliary oil tank 60 are respectively connected to helical gears 4 and the two helical gears 4 are meshed with each other. The meshing of the helical gears 4 increases the transmission torque and reduces the noise.

[0019] Another oil temperature sensor is provided at the lower part of the auxiliary fuel tank cover 6 to detect the oil temperature in the auxiliary fuel tank 60. The lower part of the auxiliary fuel tank cover 6 is also connected to an oil unloading valve 61. Another oil unloading valve is also connected to the lower part of the first end cover 11. When necessary, the oil unloading valve is opened to discharge the waste oil in the auxiliary fuel tank and the main fuel tank respectively.

[0020] The self-lubricating vacuum pump main unit of the present invention adopts the above-mentioned structure. On the one hand, it can reduce the length and volume of the main unit without affecting the lubricating oil storage space and the size of the main housing; on the other hand, the fluidity of the lubricating oil can be enhanced through the oil-slinging plate, so that the lubricating oil can fully participate in lubrication and enhance the heat dissipation effect, thereby extending the service life of the lubricating oil and reducing the frequency and cost of equipment maintenance; at the same time, oil temperature and bearing temperature sensors are also provided to protect the equipment from overtemperature.

[0021] Of course, the present invention is also provided with various oil seals, sealing rings and other components, which are common technical means and will not be described in detail here.

[0022] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A self-lubricating vacuum pump main unit, comprising a pump main unit housing and a rotor assembly disposed within the pump main unit housing, the rotor assembly comprising a driving rotor and a driven rotor whose axes are arranged in parallel, the driving rotor shaft and the driven rotor shaft both having bearings mounted on end caps of the pump main unit housing, with the bearings being located on the outer sides of the end caps, the distal ends of the driving rotor shaft and the driven rotor shaft respectively passing through the end caps and meshing with gears, characterized in that: A main oil tank cover is also installed on the outside of the first end cover of the pump main body housing, and an auxiliary oil tank cover is installed on the outside of the second end cover; a main oil tank is formed between the main oil tank cover and the first end cover, and an auxiliary oil tank is formed between the auxiliary oil tank cover and the second end cover; one end of the active rotor shaft passes through the main oil tank cover, and an oil slingering pan is installed on a section of the active rotor shaft located in the main oil tank; a plurality of oil storage recesses connected to the main oil tank are formed on the outer wall of the first end cover.

2. The self-lubricating vacuum pump main unit according to claim 1, characterized in that: The axial inner depth of the main fuel tank cover is 2-3 cm, and the axial width of the main fuel tank cover is 3-4.5 cm.

3. The self-lubricating vacuum pump main unit according to claim 1, characterized in that: Bearing temperature sensors for measuring bearing temperature are respectively installed on both sides of the first end cover; an oil temperature sensor for measuring oil temperature is also provided at the bottom of the first end cover.

4. The self-lubricating vacuum pump main unit according to claim 1, characterized in that: The ends of the driving rotor shaft and the driven rotor shaft located in the auxiliary oil tank are respectively connected to helical gears, and the two helical gears are meshed with each other.

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