Roots vacuum pump lightweight three-blade rotor structure and vacuum pump

Abstract

The application discloses a Roots vacuum pump light-weight three-blade rotor structure and a vacuum pump, which comprises an outer shell, an inner shell fixedly connected inside the outer shell, an air inlet and an air outlet of the inner shell extending to the outside of the outer shell, a transmission rod movably connected inside the inner shell, a rotor shell and a reinforcing rib fixedly connected to the surface of the transmission rod, the reinforcing rib being located inside the rotor shell and fixedly connected with the inner wall of the rotor shell, a wear-resistant coating fixedly connected to the surface of the rotor shell, and a gear fixedly connected to the back of the transmission rod and extending to the outside of the inner shell. The rotor shell and the reinforcing rib are both made of polyphenylene sulfide, so that the weight of the rotor body is reduced, the radial excitation force amplitude borne by the transmission rod during rotation is reduced, the influence on the bearing and the sealing element is weakened, the Roots vacuum pump is rapidly cooled by a semiconductor refrigerating sheet and a fan, and the gear is automatically supplied with lubricating oil by an oil cup.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of Roots vacuum pump, in particular to a Roots vacuum pump light weight three-blade rotor structure and a vacuum pump. BACKGROUND

[0002] The Roots vacuum pump has been tested for a long time in the devices such as petroleum, chemical industry, plastic, pesticide, steam turbine rotor dynamic balance, aerospace space simulation, so it should be vigorously promoted and applied in China, and it is also widely used in petroleum, chemical industry, metallurgy, textile and other industries.

[0003] The three-blade rotor in the Roots vacuum pump is generally of solid structure, which makes the three-blade rotor heavy, and the heavy three-blade rotor bears a large radial excitation force during operation, and the heavy three-blade rotor also affects the service life of bearings, sealing elements and other parts.

[0004] Therefore, it is necessary to design and reform the three-blade rotor to effectively prevent the phenomenon of excessive weight. SUMMARY

[0005] To solve the problems in the background art, the present application provides a Roots vacuum pump light weight three-blade rotor structure and a vacuum pump, which has the advantage of reducing the weight of the three-blade rotor in the Roots vacuum pump, and solves the problem of excessive weight of the three-blade rotor in the existing Roots vacuum pump.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a Roots vacuum pump light weight three-blade rotor structure and a vacuum pump, comprising an outer shell;

[0007] The inner shell is fixedly connected inside the outer shell, the gas inlet and the gas outlet of the inner shell extend to the outside of the outer shell, the transmission rod is movably connected inside the inner shell, the surface of the transmission rod is fixedly connected with the rotor shell and the reinforcing rib, the reinforcing rib is located inside the rotor shell and is fixedly connected with the inner wall of the rotor shell, and the surface of the rotor shell is fixedly connected with the wear-resistant coating;

[0008] The back surface of the transmission rod extends to the outside of the inner shell and is fixedly connected with the gear, and the two gears are meshed with each other, the front surface of the outer shell is fixedly connected with the motor, the output end of the motor extends through the outer shell and the inner shell in sequence and is fixedly connected with the front surface of the transmission rod, the surface of the inner shell is fixedly connected with the semiconductor refrigerating fin, the top of the outer shell is provided with a ventilation opening, the bottom of the inner shell is fixedly connected with the fan, the bottom of the fan extends to the outside of the outer shell, the top of the outer shell is fixedly connected with the oil cup located at the back of the ventilation opening, and the output end of the oil cup extends to the inside of the outer shell.

[0009] The bottom of the shell is fixedly connected with connecting plates located on both sides of the fan, the bottom of the connecting plate is fixedly connected with a bottom plate, and the bottom of the bottom plate is fixedly connected with a shock absorber.

[0010] The top of the bottom plate is fixedly connected with sound-absorbing louvers located on the front and back of the fan respectively, and the outer sides of the sound-absorbing louvers are fixedly connected with the bottom of the shell and the inner side of the connecting plate respectively.

[0011] The bottom of the shell is fixedly connected with a temperature sensor located on the front of the fan, and the temperature sensor is electrically connected with the fan through a signal line.

[0012] The outer side of the motor is sleeved with a protective mesh cover, and the back of the protective mesh cover is fixedly connected with the front of the shell.

[0013] The surface of the semiconductor refrigerating sheet is fixedly connected with a heat-conducting plate, and the surface of the heat-conducting plate is fixedly connected with a cooling fin.

[0014] The inner wall of the shell is fixedly connected with sound-absorbing sponges, and the sound-absorbing sponges are located outside the inner shell, the ventilation opening and the fan respectively.

[0015] The inner side of the ventilation opening is fixedly connected with a dustproof mesh plate, and the bottom of the dustproof mesh plate extends to the inside of the shell.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The rotor shell and the reinforcing ribs are both made of polyphenylene sulfide, so that the weight of the rotor body is reduced, the radial excitation force amplitude borne by the transmission rod during rotation is reduced, the influence on the bearing and the sealing element is weakened, the semiconductor refrigerating sheet and the fan are used to rapidly cool the roots vacuum pump, and the oil cup is used to automatically deliver lubricating oil to the gear.

[0018] 2、The connecting plate and the bottom plate are used to support the roots vacuum pump, and the shock absorber is used to absorb the vibration generated by the roots vacuum pump during operation, so that the roots vacuum pump is damped and noise-reduced. DETAILED DESCRIPTION

[0019] Figure 1 It is a structural schematic view of the present application;

[0020] Figure 2 It is a front view and sectional view of the inner shell of the structure of the present application;

[0021] Figure 3 It is a right view and sectional view of the shell structure of the present application;

[0022] Figure 4 It is a schematic diagram of the front view of the structure of the shell of the application;

[0023] Figure 5 It is a schematic diagram of the front view of the structure of the rotor shell of the application;

[0024] Figure 6 It is a schematic diagram of the front view of the structure of the bottom plate of the application.

[0025] In the figure: 1, shell; 2, inner shell; 3, transmission rod; 4, rotor shell; 5, reinforcing rib; 6, wear-resistant coating; 7, gear; 8, motor; 9, semiconductor refrigerating sheet; 10, ventilation opening; 11, fan; 12, oil cup; 13, connecting plate; 14, bottom plate; 15, shock absorber; 16, soundproof louver; 17, temperature sensor; 18, protective mesh cover; 19, heat-conducting plate; 20, cooling fin; 21, sound-absorbing sponge; 22, dustproof mesh plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0027] As Figures 1 to 6 shown, the lightweight three-blade rotor structure of the Roots vacuum pump provided by the application and the vacuum pump, comprising a shell 1;

[0028] The inner shell 2 is fixedly connected inside the shell 1, the air inlet and air outlet of the inner shell 2 extend to the outside of the shell 1, the transmission rod 3 is movably connected inside the inner shell 2, the rotor shell 4 and the reinforcing rib 5 are fixedly connected to the surface of the transmission rod 3, the reinforcing rib 5 is located inside the rotor shell 4 and is fixedly connected to the inner wall of the rotor shell 4, and the wear-resistant coating 6 is fixedly connected to the surface of the rotor shell 4;

[0029] The back surface of the transmission rod 3 extends to the outside of the inner shell 2 and is fixedly connected with the gear 7, the two gears 7 are meshed with each other, the front surface of the shell 1 is fixedly connected with the motor 8, the output end of the motor 8 penetrates the shell 1 and the inner shell 2 in sequence and is fixedly connected to the front surface of the transmission rod 3, the semiconductor refrigerating sheet 9 is fixedly connected to the surface of the inner shell 2, the ventilation opening 10 is formed in the top of the shell 1, the fan 11 is fixedly connected to the bottom inside the shell 1, the bottom of the fan 11 extends to the outside of the shell 1, the oil cup 12 is fixedly connected to the back surface of the ventilation opening 10 in the top of the shell 1, and the output end of the oil cup 12 extends to the inside of the shell 1.

[0030] Reference Figure 6The bottom of the shell 1 is fixedly connected with the connecting plates 13 located on both sides of the fan 11, the bottom of the connecting plate 13 is fixedly connected with the bottom plate 14, and the bottom of the bottom plate 14 is fixedly connected with the shock absorber 15.

[0031] As a technical optimization scheme of the present application, the Roots vacuum pump is supported by the connecting plate 13 and the bottom plate 14, and the vibration generated during the operation of the Roots vacuum pump is absorbed by the shock absorber 15, thereby reducing the vibration and noise of the Roots vacuum pump.

[0032] Reference Figure 3 The top of the bottom plate 14 is fixedly connected with the sound-absorbing louvers 16 located on the front and back of the fan 11 respectively, and the outer sides of the sound-absorbing louvers 16 are fixedly connected with the bottom of the shell 1 and the inner side of the connecting plate 13 respectively.

[0033] As a technical optimization scheme of the present application, the sound-absorbing louvers 16 are arranged to absorb the noise generated during the operation of the fan 11, thereby weakening the influence of the noise on the workers and improving the noise reduction performance of the Roots vacuum pump.

[0034] Reference Figure 3 The bottom of the inside of the shell 1 is fixedly connected with the temperature sensor 17 located on the front of the fan 11, and the temperature sensor 17 is electrically connected with the fan 11 through a signal line.

[0035] As a technical optimization scheme of the present application, the temperature sensor 17 is arranged to control the fan 11, so that the fan 11 only needs to be started when the temperature in the Roots vacuum pump exceeds a specified value, thereby reducing the power consumption of the fan 11.

[0036] Reference Figure 3 The outer side of the motor 8 is sleeved with the protective mesh cover 18, and the back of the protective mesh cover 18 is fixedly connected with the front of the shell 1.

[0037] As a technical optimization scheme of the present application, the protective mesh cover 18 is arranged to protect the motor 8, so as to avoid the collision between the motor 8 and foreign matters during the transportation of the Roots vacuum pump, thereby preventing the damage of the motor 8.

[0038] Reference Figure 2 The surface of the semiconductor refrigeration sheet 9 is fixedly connected with the heat-conducting plate 19, and the surface of the heat-conducting plate 19 is fixedly connected with the heat sink 20.

[0039] As a technical optimization scheme of the present application, the heat-conducting plate 19 and the heat sink 20 are arranged to increase the contact area between the semiconductor refrigeration sheet 9 and the air, accelerate the heat transfer speed from the semiconductor refrigeration sheet 9 to the air, and improve the heat dissipation efficiency of the Roots vacuum pump.

[0040] Reference Figure 2The inner wall of the shell 1 is fixedly connected with sound-absorbing sponges 21, and the sound-absorbing sponges 21 are located outside the inner shell 2, the ventilation opening 10 and the fan 11.

[0041] As a technical optimization scheme of the present application, the sound-absorbing sponges 21 are arranged to absorb the noise generated by the Roots vacuum pump during operation, weaken the influence of the noise on the workers' physical and mental health, and improve the noise reduction performance of the Roots vacuum pump.

[0042] Reference Figure 4 The inside of the ventilation opening 10 is fixedly connected with a dust screen 22, and the bottom of the dust screen 22 extends to the inside of the shell 1.

[0043] As a technical optimization scheme of the present application, the dust screen 22 is arranged to filter the air entering the shell 1, avoid impurities such as dust from entering the shell 1 through the ventilation opening 10, and prevent pollution of the inside of the shell 1.

[0044] The working principle and use process of the present application are as follows: during use, the motor 8 is started first, the motor 8 drives the rotor shell 4 to rotate through the output end, the transmission rod 3 and the gear 7, the weight of the three-blade rotor of the Roots vacuum pump is reduced due to the fact that the rotor shell 4 and the reinforcing rib 5 are both made of polyphenylene sulfide, the semiconductor refrigerating sheet 9 absorbs the heat in the inner shell 2, and the heat is transferred to the air in the shell 1 through the heat-conducting plate 19 and the heat sink 20, then the fan 11 is used to draw out the air in the shell 1, the shell 1 uses the ventilation opening 10 to suck the external air, thereby ventilating and cooling the inside of the shell 1, and finally the oil cup 12 drips lubricating oil downward to lubricate the gear 7.

[0045] In summary: the lightweight three-blade rotor structure of the Roots vacuum pump and the vacuum pump, by arranging the rotor shell 4 and the reinforcing rib 5, the weight of the rotor body is reduced due to the fact that the rotor shell 4 and the reinforcing rib 5 are both made of polyphenylene sulfide, the radial excitation force amplitude borne by the transmission rod 3 during rotation is reduced, the influence on the bearing and the sealing element is weakened, the semiconductor refrigerating sheet 9 and the fan 11 are used to rapidly cool the inside of the Roots vacuum pump, and the oil cup 12 is used to automatically deliver lubricating oil to the gear 7.

[0046] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A lightweight three-bladed rotor structure for a Roots vacuum pump and a vacuum pump, characterized by, Including the outer casing (1); An inner shell (2) is fixedly connected inside the outer shell (1). The air inlet and outlet of the inner shell (2) extend to the outside of the outer shell (1). A transmission rod (3) is movably connected inside the inner shell (2). A rotor shell (4) and a reinforcing rib (5) are fixedly connected to the surface of the transmission rod (3). The reinforcing rib (5) is located inside the rotor shell (4) and fixedly connected to the inner wall of the rotor shell (4). A wear-resistant coating (6) is fixedly connected to the surface of the rotor shell (4). Both the rotor shell (4) and the reinforcing rib (5) are made of polyphenylene sulfide. The back of the transmission rod (3) extends to the outside of the inner shell (2) and is fixedly connected to a gear (7), and the two gears (7) mesh with each other. The front of the outer shell (1) is fixedly connected to a motor (8). The output end of the motor (8) passes through the outer shell (1) and the inner shell (2) in sequence and is fixedly connected to the front of the transmission rod (3). The surface of the inner shell (2) is fixedly connected to a semiconductor cooling chip (9). The top of the outer shell (1) is provided with a vent (10). The bottom of the inside of the outer shell (1) is fixedly connected to a fan (11). The bottom of the fan (11) extends to the outside of the outer shell (1). The top of the outer shell (1) is fixedly connected to an oil cup (12) located behind the vent (10). The output end of the oil cup (12) extends to the inside of the outer shell (1).

2. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: The bottom of the outer casing (1) is fixedly connected to a connecting plate (13) located on both sides of the fan (11), and the bottom of the connecting plate (13) is fixedly connected to a base plate (14), and the bottom of the base plate (14) is fixedly connected to a shock absorber (15).

3. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 2, characterized in that: The top of the base plate (14) is fixedly connected to the sound-absorbing louvers (16) located on the front and back of the fan (11), respectively. The outer side of the sound-absorbing louvers (16) is fixedly connected to the bottom of the outer shell (1) and the inner side of the connecting plate (13).

4. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: A temperature sensor (17) located on the front of the fan (11) is fixedly connected to the bottom inside the housing (1). The temperature sensor (17) is electrically connected to the fan (11) via a signal line.

5. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: The motor (8) is fitted with a protective mesh cover (18) on its outer side, and the back of the protective mesh cover (18) is fixedly connected to the front of the outer shell (1).

6. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: A heat-conducting plate (19) is fixedly connected to the surface of the semiconductor cooling chip (9), and a heat sink (20) is fixedly connected to the surface of the heat-conducting plate (19).

7. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: The inner wall of the outer shell (1) is fixedly connected with a sound-absorbing sponge (21), which is located outside the inner shell (2), the vent (10) and the fan (11).

8. The Roots vacuum pump lightweight three lobe rotor structure and vacuum pump according to claim 1, characterized in that: A dustproof mesh plate (22) is fixedly connected inside the vent (10), and the bottom of the dustproof mesh plate (22) extends into the interior of the outer shell (1).

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