Vacuum pump structure with integrated blades

Abstract

The utility model discloses a blade integrated vacuum pump structure which comprises a pump shell, an air inlet is formed in one side of the pump shell, a plurality of air outlets are formed in the other side of the pump shell, an installation opening is formed in one side of the pump shell, a rotor is rotationally connected in the installation opening, guide grooves are formed in the two sides of the rotor, and a composite blade assembly is connected between the two guide grooves in a sliding mode. The composite blade assembly comprises a blade body, the blade body slides between the two guide grooves, connecting sleeves are arranged at the two ends of the blade body in a laser cladding mode, wear-resistant layers are arranged on the outer walls of the connecting sleeves, and protruding blocks are integrally formed at the two ends of each connecting sleeve. Titanium alloy powder is cladded at the two ends of the aluminum alloy blade body to form the gradient metallurgical bonding layers to manufacture the connecting sleeve, so that high-speed particle erosive wear is effectively resisted, the service life of the end of the blade body is prolonged, the connecting sleeve and the blade body can be connected more firmly in the mode, and the connecting sleeve is prevented from loosening.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a vacuum pump structure with integrated blades. Background Technology

[0002] Currently, vacuum pumps consist of a pump casing, pump cover, rotor, blades, and other structures. Since the blade tips constantly rub against the inner wall of the pump casing during rotation, wear-resistant structures are installed at the ends to extend the service life of the vacuum pump blades.

[0003] In existing vacuum pumps, the blades and the wear-resistant structures at both ends are connected by snap-fit, which makes the blades and the wear-resistant structures prone to loosening after long-term use, affecting the pump's pumping function. Therefore, in order to better ensure the service life of vacuum pump blades, promote technological progress in the industry, and improve core technology competitiveness, this application proposes a new implementation scheme that differs from the existing vacuum pump blade structure and application method. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the blades and wear-resistant structures of existing vacuum pumps are prone to loosening after a long period of time, and to propose a vacuum pump structure with integrated blades.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vacuum pump structure with an integrated blade includes a pump housing. One side of the pump housing has an air inlet, and the other side has multiple air outlets. One side of the pump housing has an mounting port, within which a rotor is rotatably connected. Both sides of the rotor have guide grooves, and a composite blade assembly is slidably connected between the two guide grooves. The composite blade assembly includes a blade body that slides between the two guide grooves. Both ends of the blade body are laser-clad with connecting sleeves. The outer wall of the connecting sleeves has a wear-resistant layer, and both ends of the connecting sleeves have integrally formed protrusions. Both ends of the blade body have grooves, with the protrusions engaging with the grooves. Both sides of the blade body have multiple side grooves.

[0007] Furthermore, a pump cover is fixedly connected to one end of the pump casing.

[0008] Furthermore, a first sealing ring is snapped onto one end of the pump housing, and the first sealing ring contacts the pump cover.

[0009] Furthermore, the top of the pump casing is provided with a connection port, which is connected to the air inlet, and an air inlet pipe is internally threaded into the connection port.

[0010] Furthermore, a second sealing ring is fitted onto the outer circumferential wall of the air intake pipe, and the second sealing ring contacts the inner wall of the connection port.

[0011] Furthermore, the bottom end of the inner circumference of the intake pipe is provided with an installation groove, and a one-way sealing component is provided in the installation groove. The one-way sealing component includes a support base, which is locked at the bottom end of the intake pipe. The top of the support base is provided with multiple air vents, and a sealing plug is slidably connected inside the support base. A spring is sleeved on the outer wall of the sealing plug.

[0012] Furthermore, the top end of the air intake pipe is threaded with a sealing cap, and the top of the sealing cap is integrally formed with a cross seat.

[0013] Furthermore, the wear-resistant layer is either a titanium aluminum nitride coating or a titanium silicon nitride coating.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. A connecting sleeve is made by cladding titanium alloy powder at both ends of the aluminum alloy blade body to form a gradient metallurgical bonding layer, thereby effectively resisting high-speed particle erosion and wear, extending the life of the blade body end, and this method can make the connection between the connecting sleeve and the blade body more secure, thereby preventing the connecting sleeve from loosening.

[0016] 2. By using either titanium nitride aluminum coating or titanium nitride silicon coating as the wear-resistant layer, it has high hardness, good wear resistance, effectively resists high-speed particle erosion, and has a low dry friction coefficient, which can reduce sliding wear at the blade tip. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a vacuum pump structure with an integrated blade proposed in this utility model;

[0018] Figure 2 This is a front view of the pump casing of a vacuum pump structure with an integrated blade, as proposed in this utility model.

[0019] Figure 3 This is a cross-sectional side view of a vacuum pump structure with an integrated blade, as proposed in this utility model.

[0020] Figure 4 This is a front cross-sectional view of a vacuum pump structure with an integrated blade, as proposed in this utility model.

[0021] Figure 5 This is a partial three-dimensional structural diagram of a vacuum pump structure with an integrated blade proposed in this utility model;

[0022] Figure 6 This is a schematic diagram of the front view of the end section of a composite blade assembly of a vacuum pump structure with integrated blades, as proposed in this utility model.

[0023] Figure 7This is a top view of the cross-sectional structure of a composite blade assembly for a vacuum pump with an integrated blade, as proposed in this utility model.

[0024] Figure 8 This is a partial cross-sectional front view schematic diagram of a vacuum pump structure with an integrated blade proposed in this utility model.

[0025] In the diagram: 1. Pump casing; 2. Air inlet; 3. Air outlet; 4. Mounting port; 5. Rotor; 6. Guide groove; 7. Composite blade assembly; 701. Blade body; 702. Connecting sleeve; 703. Wear-resistant layer; 704. Protrusion; 705. Groove; 706. Side groove; 8. Pump cover; 9. First sealing ring; 10. Connecting port; 11. Air inlet pipe; 12. Second sealing ring; 13. Mounting groove; 14. One-way sealing assembly; 1401. Support base; 1402. Vent; 1403. Sealing plug; 1404. Spring; 15. Sealing cover; 16. Cross seat. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figures 1-8 A vacuum pump structure with integrated blades includes a pump housing 1, an air inlet 2 on one side of the pump housing 1, multiple air outlets 3 on the other side of the pump housing 1, an installation port 4 on one side of the pump housing 1, a rotor 5 rotatably connected in the installation port 4, guide grooves 6 on both sides of the rotor 5, a composite blade assembly 7 slidably connected between the two guide grooves 6, the composite blade assembly 7 includes a blade body 701, the blade body 701 slides between the two guide grooves 6, and connecting sleeves 702 are laser-clad at both ends of the blade body 701. The connecting sleeves 702 are formed by cladding titanium alloy powder at both ends of the aluminum alloy blade body 701 to form a gradient metallurgical bonding layer, thereby effectively resisting high-speed particle erosion and wear and extending the end life of the blade body 701.

[0028] The outer wall of the connecting sleeve 702 is provided with a wear-resistant layer 703, thereby improving the wear resistance of the connecting sleeve 702;

[0029] Both ends of the connecting sleeve 702 are integrally formed with protrusions 704, and both ends of the blade body 701 are provided with grooves 705. The protrusions 704 and the grooves 705 are engaged, thereby improving the firmness of the connection between the blade body 701 and the connecting sleeve 702. Both sides of the blade body 701 are provided with multiple side grooves 706. The side grooves 706 on the blade body 701 reduce the weight of the blade body 701, thereby meeting the lightweight requirement of the blade body 701.

[0030] One end of the pump housing 1 is fixed with a pump cover 8 by bolts, and a first sealing ring 9 is snapped into one end of the pump housing 1. The first sealing ring 9 contacts the pump cover 8, thereby sealing the pump housing 1 and the pump cover 8 to prevent air leakage.

[0031] The pump housing 1 has a connection port 10 at its top, which communicates with the air inlet 2. An air inlet pipe 11 is threaded into the connection port 10. A second sealing ring 12 is fitted around the outer circumference of the air inlet pipe 11, and the second sealing ring 12 contacts the inner wall of the connection port 10. A mounting groove 13 is provided at the bottom end of the inner circumference of the air inlet pipe 11. A one-way sealing assembly 14 is provided in the mounting groove 13. The one-way sealing assembly 14 includes a support base 1401, which is snapped into the bottom end of the air inlet pipe 11. The top of the support base 1401 has multiple air vents 1402. Sealing plugs 140 are slidably connected up and down inside the support base 1401. 3. Under the rotation of the rotor 5, the gas enters from the inlet pipe 11. Under the impact of the gas, the sealing plug 1403 moves downward, thereby connecting the inlet pipe 11 with the inlet port 2. Then, the gas is input into the pump housing 1 from the inlet port 2. When the gas enters the pump housing 1, it pushes the rotor 5 to rotate, thereby pushing the gas in the pump housing 1 into the inlet and outlet ports 3, and then discharging it from the outlet port 3, thereby realizing the operation of the vacuum pump. The outer wall of the sealing plug 1403 is fitted with a spring 1404. Under the elastic action of the spring 1404, the sealing plug 1403 is reset, thereby blocking the connection channel between the inlet pipe 11 and the inlet port 2.

[0032] The top of the intake pipe 11 is threaded with a sealing cap 15. The top of the sealing cap 15 is integrally formed with a cross seat 16. Tightening the cross seat 16 causes the sealing cap 15 to rotate, which facilitates the tightening and disassembly of the sealing cap 15. The wear-resistant layer 703 is one of titanium nitride aluminum coating or titanium nitride silicon coating. It has high hardness, good wear resistance, effectively resists high-speed particle erosion, and has a low dry friction coefficient, which can reduce the sliding wear at the blade tip.

[0033] The working principle of this embodiment is as follows: When working, the sealing cover 15 is unscrewed. Then, under the rotation of the rotor 5, the gas enters from the inlet pipe 11. Under the impact of the gas, the sealing plug 1403 moves downward, thereby connecting the inlet pipe 11 with the inlet port 2. Then, the gas is input into the pump housing 1 from the inlet port 2. When the gas enters the pump housing 1, it pushes the rotor 5 to rotate, thereby pushing the gas in the pump housing 1 into the inlet and outlet ports 3, and then discharging it from the outlet port 3. The vacuum pump works according to the above cycle process.

[0034] Then, titanium alloy powder is fused onto both ends of the aluminum alloy blade body 701 to form a gradient metallurgical bonding layer to make a connecting sleeve 702, thereby effectively resisting high-speed particle erosion and wear, extending the end life of the blade body 701, and improving the corrosion resistance of the blade body 701, while also being lightweight. Next, a side groove 706 is provided on the blade body 701 to reduce the weight of the blade body 701, thereby achieving the lightweight requirement of the blade body 701.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum pump structure with integrated blades, comprising a pump casing (1), characterized in that, The pump housing (1) has an air inlet (2) on one side and multiple air outlets (3) on the other side. The pump housing (1) has an installation port (4) on one side. A rotor (5) is rotatably connected in the installation port (4). Guide grooves (6) are provided on both sides of the rotor (5). A composite blade assembly (7) is slidably connected between the two guide grooves (6). The composite blade assembly (7) includes a blade body (701). The blade body (701) slides between the two guide grooves (6). The two ends of the blade body (701) are laser-clad with connecting sleeves (702). The outer wall of the connecting sleeve (702) is provided with a wear-resistant layer (703). Both ends of the connecting sleeve (702) are integrally formed with protrusions (704). Both ends of the blade body (701) are provided with grooves (705). The protrusions (704) and grooves (705) are engaged. Both sides of the blade body (701) are provided with multiple side grooves (706).

2. The vacuum pump structure with integrated blades according to claim 1, characterized in that, A pump cover (8) is fixedly connected to one end of the pump casing (1).

3. The vacuum pump structure with integrated blades according to claim 1, characterized in that, One end of the pump housing (1) is fitted with a first sealing ring (9), which is in contact with the pump cover (8).

4. The vacuum pump structure with integrated blades according to claim 1, characterized in that, The top of the pump housing (1) is provided with a connection port (10), which is connected to the air inlet (2). An air inlet pipe (11) is threaded into the connection port (10).

5. The vacuum pump structure with integrated blades according to claim 4, characterized in that, The outer circumferential wall of the air intake pipe (11) is fitted with a second sealing ring (12), and the second sealing ring (12) contacts the inner wall of the connection port (10).

6. The vacuum pump structure with integrated blades according to claim 5, characterized in that, The bottom end of the inner circumference of the air intake pipe (11) is provided with an installation groove (13), and a one-way sealing assembly (14) is provided in the installation groove (13). The one-way sealing assembly (14) includes a support seat (1401), which is locked at the bottom end of the air intake pipe (11). The top of the support seat (1401) is provided with multiple air vents (1402). A sealing plug (1403) is slidably connected inside the support seat (1401), and a spring (1404) is sleeved on the outer wall of the sealing plug (1403).

7. The vacuum pump structure with integrated blades according to claim 4, characterized in that, The top end of the air intake pipe (11) is threaded with a sealing cap (15), and the top of the sealing cap (15) is integrally formed with a cross seat (16).

8. The vacuum pump structure with integrated blades according to claim 1, characterized in that, The wear-resistant layer (703) is either a titanium aluminum nitride coating or a titanium silicon nitride coating.

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