Four-shaft single-drive type multi-stage Roots dry vacuum pump

Abstract

The utility model relates to the technical field of roots pumps, and discloses a four-shaft single-drive type multistage roots dry vacuum pump. The pump body comprises a pump body shell, a first-stage rotor, a second-stage rotor, a synchronous transmission mechanism and a heat dissipation assembly, a first-stage cavity and a second-stage cavity are formed in one side of the pump body shell, and an air guide opening is formed in the middle of the pump body shell. The water storage tanks are fixedly arranged on the two sides of the pump body shell, the heat dissipation fins are evenly arranged on the two sides of the pump body shell, the heat dissipation fins increase the heat dissipation area of the outer side of the pump body shell, then heat dissipation of the pump body shell is improved, meanwhile, clean water is added into the water storage tanks, and heat dissipation efficiency is improved through the water guide lines fixedly arranged on the outer sides of the main fin plates. The capillary action is utilized, so that the outer side of the main fin plate is soaked with clear water for evaporation and heat absorption of water, the effect of a pump body shell is further improved, a rotor arranged in the roots pump is located at a proper working temperature, and the service life of the roots pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots pumps, in particular to a four-axis single-drive multi-stage Roots dry vacuum pump. Background Art

[0002] Roots pump is a centrifugal rotary exhaust pump, which consists of two intermeshing impellers. It sucks gas from the suction port through the rotation of the impeller, and then discharges the gas through the rotation of the impeller and the action of centrifugal force; it is suitable for conveying clean, dry, non-corrosive gas, and is widely used in chemical, pharmaceutical, food, environmental protection and other industries; the working principle of Roots pump is to generate gas compression and discharge through the rotation of the impeller, thereby realizing gas conveyance and discharge.

[0003] The existing Roots pump installation structure is relatively compact. When the Roots pump is working, a large amount of heat will be generated. Due to the compact structure of the Roots pump and the small heat dissipation area, the internal heat is not easy to discharge and accumulates in the shell, which will cause the temperature inside the shell to rise, thereby causing the rotor inside the Roots pump to be more easily damaged, resulting in a decrease in the service life of the Roots pump. At the same time, since most of the existing Roots pumps adopt a dual-rotor structure, the vacuum efficiency is low. Therefore, we propose a four-axis single-drive multi-stage Roots dry vacuum pump to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a four-axis single-drive multi-stage Roots dry vacuum pump, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model is a four-axis single-drive multi-stage Roots dry vacuum pump, comprising:

[0007] A pump housing, wherein a first-stage cavity and a second-stage cavity are formed on one side of the pump housing, and an air guide port is formed in the middle of the pump housing, and the first-stage cavity and the second-stage cavity are connected through the air guide port;

[0008] A first-stage rotor, the first-stage rotor is arranged inside the first-stage cavity, and the first-stage rotor is symmetrically arranged inside the first-stage cavity;

[0009] A second-stage rotor, the second-stage rotor is arranged inside the second-stage cavity, and the second-stage rotor is symmetrically arranged inside the second-stage cavity;

[0010] A synchronous transmission mechanism, the synchronous transmission mechanism is arranged on one side of the pump body shell, and the synchronous transmission mechanism is used to drive the first-stage rotor and the second-stage rotor to rotate;

[0011] as well as

[0012] A heat dissipation component is arranged on the outside of the pump body shell.

[0013] Furthermore, the heat dissipation component includes a water reservoir and heat dissipation fins, the water reservoir is fixedly arranged on the lower outer side of the pump body shell, the water reservoir is symmetrically distributed on the outer side of the pump body shell, the heat dissipation fins are evenly distributed on both sides of the pump body shell, the heat dissipation fins are fixedly arranged on the outer side of the pump body shell, and the lower end of the heat dissipation fin is embedded in the inner side of the water reservoir.

[0014] Furthermore, the cooling fins include a main fin, an auxiliary fin and a water guide, the main fin is fixedly arranged on the outside of the pump body shell, the auxiliary fins are evenly distributed on both sides of the main fin, the auxiliary fins are fixedly arranged on both sides of the main fin, the water guide is arranged between the auxiliary fins, and the water guide is fixedly installed on the outside of the main fin.

[0015] Furthermore, the synchronization mechanism includes a first-stage gear, a reversing gear and a second-stage gear, the first-stage gear is fixedly mounted on the outside of the first-stage rotor, the first-stage gears are meshed with each other, the second-stage gear is fixedly mounted on one end of the second-stage rotor, the reversing gear is meshed with the second-stage gear, and the reversing gear is meshed with the first-stage gear.

[0016] Furthermore, an isolation end cover is fixedly installed at one end of the pump body shell, the first-stage rotor is rotatably connected to the isolation end cover, and the first-stage rotor passes through the isolation end cover, and the second-stage rotor is rotatably connected to the isolation end cover, and the second-stage rotor passes through the isolation end cover.

[0017] Furthermore, the synchronous transmission mechanism is arranged on a side of the isolation end cover away from the pump body shell.

[0018] Furthermore, the reversing gear is rotatably connected to one side of the isolation end cover.

[0019] Furthermore, a second end cover is fixedly mounted on a side of the isolation end cover away from the pump body shell, and one of the first-stage rotors passes through the second end cover.

[0020] Furthermore, a first end cover is fixedly mounted on one end of the pump body shell, the first-stage rotor is rotatably connected to the first end cover, and the second-stage rotor is rotatably connected to the first end cover.

[0021] Furthermore, an air inlet is provided at the lower end of the pump shell, and an air outlet is provided at the upper end of the pump shell.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The utility model has water reservoirs fixedly arranged on both sides of the pump shell and heat dissipation fins evenly arranged on both sides of the pump shell. The heat dissipation fins increase the heat dissipation area of ​​the outer side of the pump shell, thereby improving the heat dissipation of the pump shell. At the same time, clean water is added to the water reservoir, and the outer side of the main fin is soaked with clean water through a water guide fixedly arranged on the outer side of the main fin plate by capillary action, which is used for evaporation and heat absorption of water, thereby further improving the effect of the pump shell, thereby making the rotor inside the Roots pump at a suitable working temperature, which is beneficial to improving the service life of the Roots pump.

[0024] 2. The utility model has a first-stage cavity and a second-stage cavity opened on one side of the pump body shell, a pair of first-stage rotors are arranged inside the first-stage cavity, and a pair of second-stage rotors are arranged inside the second-stage cavity, and the first-stage cavity is connected with the second-stage cavity through an air guide port, so that the Roots pump has two sets of rotors, and the synchronous transmission mechanism enables the Roots pump to improve the vacuum efficiency of the vacuum pump through two-stage vacuum action. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall assembly of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the pump housing of the utility model;

[0029] Figure 5 This is a schematic cross-sectional view of the pump housing of the utility model;

[0030] Figure 6 This is a schematic diagram of the second end cover structure of the utility model;

[0031] Figure 7 This is a schematic diagram of the synchronous transmission mechanism of the utility model;

[0032] Figure 8 This is a schematic diagram of the first-stage rotor structure of the utility model;

[0033] Fig. 9 For this utility model Figure 4 A partial enlarged schematic diagram in the middle.

[0034] In the figure: 1. pump body shell; 2. first end cover; 3. isolation end cover; 4. second end cover; 5. first-stage rotor; 6. first-stage gear; 7. reversing gear; 8. second-stage gear; 9. main fin; 10. water reservoir; 11. auxiliary fin; 12. water guide; 13. air inlet; 14. air outlet; 15. first-stage cavity; 16. second-stage cavity; 17. air guide port; 18. second-stage rotor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-9 A four-axis single-drive multi-stage Roots dry vacuum pump comprises a pump housing 1, a first-stage cavity 15 and a second-stage cavity 16 are provided on one side of the pump housing 1, the first-stage cavity 15 and the second-stage cavity 16 penetrate the pump housing 1, the cross section of the first-stage cavity 15 is two partially overlapping circles, the cross-sectional shapes of the first-stage cavity 15 and the second-stage cavity 16 are the same, and the cross-sectional area of ​​the second-stage cavity 16 is smaller than the cross-sectional area of ​​the first-stage cavity 15, an air guide port 17 is provided in the middle of the pump housing 1, the first-stage cavity 15 and the second-stage cavity 16 are connected through the air guide port 17, a first-stage rotor 5 is provided inside the first-stage cavity 15, and the first-stage rotor 5 is symmetrically arranged inside the first-stage cavity 15, the two first-stage rotors 5 are meshed with each other, and a second-stage rotor 5 is provided inside the second-stage cavity 16 The first-stage rotor 18 is symmetrically arranged inside the second-stage cavity 16, and the two second-stage rotors 18 are meshed with each other. A first end cover 2 is fixedly installed on one side of the pump body shell 1 by screws. The first end cover 2 is used to block the first-stage cavity 15 and the second-stage cavity 16 that pass through the pump body shell 1, and one end of the first-stage rotor 5 that passes through the first-stage cavity 15 is rotatably connected to the first end cover 2, and one end of the second-stage rotor 18 that passes through the second-stage cavity 16 is rotatably connected to the first end cover 2. An isolation end cover 3 is fixedly installed on the side of the pump body shell 1 away from the first end cover 2 by screws, the first-stage rotor 5 is rotatably connected to the isolation end cover 3, and the first-stage rotor 5 passes through the isolation end cover 3, the second-stage rotor 18 is rotatably connected to the isolation end cover 3, and the second-stage rotor 18 passes through the isolation end cover 3.

[0037] A synchronous transmission mechanism is arranged on the side of the isolation end cover 3 away from the pump body casing 1, and the synchronous transmission mechanism is composed of a first-stage gear 6, a reversing gear 7 and a second-stage gear 8. The first-stage gear 6 is sleeved on the outer side of the first-stage rotor 5, and the first-stage gear 6 is fixedly installed on the outer side of the first-stage rotor 5. The first-stage gears 6 fixed on the outer side of the first-stage rotor 5 are meshed with each other. When one of the first-stage rotors 5 rotates, the rotating first-stage rotor 5 drives the other first-stage rotor 5 to rotate through the first-stage gear 6 fixedly arranged on the outer side thereof and meshing with each other. The reversing gear 7 is rotationally connected to the side of the isolation end cover 3 away from the pump body casing 1, and the reversing gear 7 is symmetrically arranged on the side of the isolation end cover 3, and the reversing gear 7 is meshed with the first-stage gear 6. The second-stage gear 8 is sleeved on the outer side of the second-stage rotor 18, and the second-stage gear 8 is fixedly arranged on the outer side of the second-stage rotor 18. The first-stage rotor 5 is fixedly installed on the outer side of the second-stage rotor 18, and the second-stage gear 8 is meshed with the first-stage gear 6. When one of the first-stage rotors 5 rotates, the first-stage rotor 5 drives the first-stage gear 6 fixedly installed on the outer side thereof to rotate, the first-stage gear 6 drives the reversing gear 7 to rotate, the reversing gear 7 drives the second-stage gear 8 to rotate, and then drives the second-stage rotor 18 to rotate. By setting the reversing gear 7 rotatably connected to one side of the isolation end cover 3, the first-stage gear 6 and the second-stage gear 8 have the same direction of rotation, and then the first-stage rotor 5 and the second-stage gear 8 have the same rotation. At the same time, the rotating first-stage gear 6 drives the first-stage gear 6 meshed therewith to rotate in opposite directions, and the first-stage gear 6 on the right side drives the second-stage gear 8 on the right side to rotate through the reversing gear 7 on the right side, and then the second-stage rotor 18 on the right side rotates.

[0038] A second end cover 4 is fixedly mounted on the side of the isolation end cover 3 away from the pump body shell 1, and one of the longer first-stage rotors 5 passes through the second end cover 4. An air inlet 13 is provided at the lower end of the pump body shell 1, and an air outlet 14 is provided at the upper end of the pump body shell 1. When the four-axis single-drive multi-stage Roots dry vacuum pump is used, the output end of the motor is connected to the first-stage rotor 5, and the motor drives the left first-stage rotor 5 to rotate. The left first-stage rotor 5 drives the right first-stage rotor 5 to rotate in opposite directions through the mutually meshing first-stage gears 6. When the two first-stage rotors 5 rotate, gas is pumped in from the air inlet 13, and air is pumped from the inside of the first-stage cavity 15 into the second-stage cavity through the air guide port 17 opened in the middle of the pump body shell 1. Inside the cavity 16, the first-stage rotor 5 drives the two second-stage rotors 18 arranged on the inner side of the second-stage cavity 16 to rotate through a synchronous transmission mechanism composed of a first-stage gear 6, a reversing gear 7 and a second-stage gear 8. The two second-stage rotors 18 rotating in opposite directions pump the gas inside the second-stage cavity 16 out of the gas outlet 14, and perform preliminary vacuum through a first-stage vacuum component composed of two first-stage rotors 5, and then perform a second vacuum through a second-stage vacuum component composed of two second-stage rotors 18, so that the four-axis single-drive multi-stage Roots dry vacuum pump can improve the vacuum efficiency of the vacuum pump through the two-stage vacuum action, so that the vacuum of the four-axis single-drive multi-stage Roots dry vacuum pump is faster, more efficient and sufficient.

[0039] Water reservoirs 10 are fixedly arranged on both sides of the pump housing 1, and the water reservoirs 10 are arranged at the lower outer side of the pump housing 1. Heat dissipation fins are evenly arranged on both sides of the pump housing 1, and the heat dissipation fins are fixedly arranged on the outer side of the pump housing 1, and one end of the heat dissipation fin is embedded in the inner side of the water reservoir 10. The heat dissipation fins can increase the contact area between the pump housing 1 and the external connection, thereby improving the heat dissipation speed of the four-axis single-drive multi-stage Roots dry vacuum pump, and the heat dissipation fins are composed of a main fin plate 9, an auxiliary fin plate 11 and a water guide line 12. The main fin plate 9 is fixedly arranged on the outer side of the pump housing 1, and the auxiliary fin plates 11 are evenly distributed on both sides of the main fin plate 9. The plate 11 is fixedly arranged on both sides of the main fin plate 9, the water guide line 12 is arranged between the auxiliary fin plates 11, and the water guide line 12 is fixedly installed on the outer side of the main fin plate 9. The water guide line 12 is made of cotton thread. When using the four-axis single-drive multi-stage Roots dry vacuum pump, add clean water to the inside of the water reservoir 10, and use the capillary effect to soak the water guide line 12 with clean water, and soak the clean water on the entire cooling fin. Use the characteristics of water evaporation and heat absorption to accelerate the diffusion of heat, further improve the heat dissipation of the pump body shell 1, and then make the rotor set inside the pump body shell 1 at a suitable working temperature, which is beneficial to improve the service life of the Roots pump.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-axis single-drive multi-stage Roots dry vacuum pump, characterized in that: include: A pump housing (1) and a synchronization mechanism, wherein a first-stage cavity (15) and a second-stage cavity (16) are provided on one side of the pump housing (1), an air guide port (17) is provided in the middle of the pump housing (1), and the first-stage cavity (15) and the second-stage cavity (16) are connected via the air guide port (17); A first-stage rotor (5), the first-stage rotor (5) being arranged inside the first-stage cavity (15), and the first-stage rotor (5) being symmetrically arranged inside the first-stage cavity (15); A second-stage rotor (18), the second-stage rotor (18) being arranged inside the second-stage cavity (16), and the second-stage rotor (18) being symmetrically arranged inside the second-stage cavity (16); A synchronous transmission mechanism, the synchronous transmission mechanism being arranged on one side of the pump housing (1), the synchronous transmission mechanism being used to drive the first-stage rotor (5) and the second-stage rotor (18) to rotate; as well as A heat dissipation component is arranged on the outside of the pump body shell (1).

2. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 1, characterized in that: The heat dissipation component comprises a water reservoir (10) and heat dissipation fins, wherein the water reservoir (10) is fixedly arranged at the lower part of the outer side of the pump casing (1), the water reservoir (10) is symmetrically distributed on the outer side of the pump casing (1), the heat dissipation fins are evenly distributed on both sides of the pump casing (1), the heat dissipation fins are fixedly arranged on the outer side of the pump casing (1), and the lower ends of the heat dissipation fins are embedded in the inner side of the water reservoir (10).

3. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 2, characterized in that: The heat dissipation fin comprises a main fin plate (9), an auxiliary fin plate (11) and a water guide line (12); the main fin plate (9) is fixedly arranged on the outside of the pump body shell (1); the auxiliary fin plates (11) are evenly distributed on both sides of the main fin plate (9); the auxiliary fin plates (11) are fixedly arranged on both sides of the main fin plate (9); the water guide line (12) is arranged between the auxiliary fin plates (11); and the water guide line (12) is fixedly installed on the outside of the main fin plate (9).

4. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 1, characterized in that: The synchronization mechanism comprises a first-stage gear (6), a reversing gear (7) and a second-stage gear (8); the first-stage gear (6) is fixedly mounted on the outer side of the first-stage rotor (5); the first-stage gears (6) are meshed with each other; the second-stage gear (8) is fixedly mounted on one end of the second-stage rotor (18); the reversing gear (7) is meshed with the second-stage gear (8); and the reversing gear (7) is meshed with the first-stage gear (6).

5. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 4, characterized in that: An isolation end cover (3) is fixedly mounted on one end of the pump housing (1); the first-stage rotor (5) is rotatably connected to the isolation end cover (3), and the first-stage rotor (5) passes through the isolation end cover (3); the second-stage rotor (18) is rotatably connected to the isolation end cover (3), and the second-stage rotor (18) passes through the isolation end cover (3).

6. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 5, characterized in that: The synchronous transmission mechanism is arranged on a side of the isolation end cover (3) away from the pump body casing (1).

7. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 5, characterized in that: The reversing gear (7) is rotatably connected to one side of the isolation end cover (3).

8. The four-axis single-drive multi-stage Roots dry vacuum pump according to claim 5, characterized in that: A second end cover (4) is fixedly mounted on the side of the isolation end cover (3) away from the pump housing (1), wherein one of the first-stage rotors (5) passes through the second end cover (4).

9. A four-axis single-drive multi-stage Roots dry vacuum pump according to claim 1, characterized in that: A first end cover (2) is fixedly mounted on one end of the pump housing (1); the first-stage rotor (5) is rotatably connected to the first end cover (2); and the second-stage rotor (18) is rotatably connected to the first end cover (2).

10. The four-axis single-drive multi-stage Roots dry vacuum pump according to claim 1, characterized in that: An air inlet (13) is provided at the lower end of the pump housing (1), and an air outlet (14) is provided at the upper end of the pump housing (1).

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