Double-body type pulse jet vacuum pump

Abstract

The invention belongs to the technical field of vacuum pumps, and discloses a double-body pulsed jet vacuum pump which comprises a pump body and a motor, and the pump body comprises a pump shell, a pump shaft, a suction chamber, a mixing chamber, a liquid guide-in device, a jet pipe and a diffusion pipe; an impeller cavity and two mixing chambers which are communicated with each other are arranged in the pump shell; the mixing chamber is communicated with an injection pipe, and the injection pipe is communicated with a diffusion pipe; the pump shaft is rotationally connected with the pump shell; the pump shaft is fixedly connected with two impellers, the impellers are in one-to-one correspondence with the mixing chambers, and nozzles are formed between adjacent blades of the impellers; an output shaft of the motor is connected with the pump shaft; the suction chamber comprises two outlets which are communicated with the mixing chamber; the liquid leading-in device is used for guiding liquid to the impeller. Through mutual cooperation of the impeller, the mixing chamber, the suction chamber, the distributor and the water segregator, the gas-liquid mixing efficiency and the gas suction capacity are improved, the requirements of high-load working conditions and space limitation are met, the problem that the length of the pump body is increased due to the fact that the air suction amount is increased is effectively solved, and the research and development period is remarkably shortened.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, in particular to a twin-body pulse jet vacuum pump. Background Art

[0002] Jet vacuum pumps use jet shear and turbulent diffusion to extract gas and transfer mass and energy. They have no moving parts and have the advantages of simple structure, high reliability, and low operation and maintenance costs. They are often used in power, chemical, tobacco, seawater desalination and other occasions that require vacuum. However, the efficiency of jet vacuum pumps is low, and the use of pulse jets instead of continuous jets can effectively improve the efficiency of jet vacuum pumps, that is, pulse jet vacuum pumps.

[0003] There are three main ways to generate pulse jets: one is to add a valve to the working water pipe and realize pulse jet by quickly opening and closing the valve, but the pulse frequency is low and the valve reliability is low; the other is to use a self-excited oscillation nozzle to generate pulse jets, which also has a low pulse frequency; both of these require that the high-pressure working water is converted into a high-speed jet through a nozzle, and the high-pressure working water is usually provided by a centrifugal pump. If the high-speed rotating impeller in the centrifugal pump is directly used as the nozzle of the jet vacuum pump, the conversion and transition links between the centrifugal pump and the jet vacuum pump can be eliminated, and a pulse jet effect can be generated, thereby greatly improving work efficiency. This is the third way to generate pulse jets, which has the advantages of compact structure, high pulse frequency and high efficiency.

[0004] At present, the third form of pulse jet generation is generally used. However, if the suction volume is to be doubled, it is often necessary to proportionally increase the volume of the pulse jet vacuum pump, especially the length of the pulse jet vacuum pump, so it is not suitable for occasions with high space restrictions. Summary of the invention

[0005] The present invention intends to provide a twin-body pulse jet vacuum pump, which improves the gas-liquid mixing efficiency and the gas suction capacity through the cooperation of the impeller, pump body, mixing chamber, suction chamber, distributor, and water separator, thereby meeting the actual needs of high-load conditions and space limitations. It not only effectively solves the problem of increasing the length of the pump body due to increasing the suction volume, but also significantly shortens the research and development cycle.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A twin-body pulse jet vacuum pump comprises a pump body and a motor, wherein the pump body comprises a pump casing, a pump shaft, a suction chamber, a mixing chamber, a liquid introduction device, an injection pipe and a diffusion pipe; an impeller cavity and two mixing chambers are arranged in the pump casing, and both the mixing chambers are connected to the impeller cavity; and the mixing chamber is connected to an injection pipe, and the injection pipe is connected to a diffusion pipe; the pump shaft is located in the impeller cavity, and the pump shaft is rotatably connected to the pump casing; the pump shaft is fastened to two impellers, and the impellers correspond to the mixing chambers one by one, and nozzles are formed between adjacent blades of the impellers for spraying high-pressure liquid; the output shaft of the motor is connected to the pump shaft; the suction chamber comprises two outlets, one of the outlets is connected to one of the mixing chambers, and the other of the outlets is connected to the other of the mixing chambers; the liquid introduction device is used to guide the liquid to the impeller.

[0008] Furthermore, the liquid introduction device includes a water distributor, the water distributor includes a straight pipe, the outlet of the straight pipe is connected to a first arc pipe and a second arc pipe, the first arc pipe and the second arc pipe are respectively connected to an impeller distributor, and the impeller distributor is used to evenly distribute the liquid transported by the water distributor to the impeller.

[0009] Furthermore, a plurality of first guide vanes are evenly spaced apart in the first arc-shaped tube and the second arc-shaped tube respectively; and a plurality of second guide vanes are evenly spaced apart in the impeller distributor.

[0010] Furthermore, the two impellers are symmetrically arranged about the water separator.

[0011] The principle and beneficial effects of the technical solution are:

[0012] 1. A twin-body pulse jet vacuum pump provided by the present invention comprises a pump body and a motor, wherein the pump body comprises a pump casing, a pump shaft, a suction chamber, a mixing chamber, a liquid introduction device, an injection pipe and a diffusion pipe, wherein the output shaft of the motor is connected to the pump shaft, the motor drives the pump shaft to rotate, and the pump shaft drives the impeller to rotate; an impeller cavity and two mixing chambers are arranged in the pump casing, both mixing chambers are connected to the impeller cavity, the impeller cavity is used to accommodate the pump shaft and the impeller, and the mixing chamber is used to mix gas and liquid; specifically, the pump shaft is located in the impeller cavity, and the pump shaft is rotatably connected to the pump casing, the pump shaft is fastened to two impellers, and the impellers correspond to the mixing chambers one by one, and nozzles are formed between adjacent blades of the impellers for injecting high-pressure liquid into the mixing chamber; the suction chamber comprises two outlets, one outlet is connected to one mixing chamber, and the other outlet is connected to the other mixing chamber, so that the gas sucked from the outside can enter the two mixing chambers respectively, that is, double gas can be sucked; the liquid introduction device is used to guide the liquid to the impeller to achieve uniform mixing of gas and liquid. The mixing chamber is connected with an injection pipe, and the injection pipe is connected with a diffusion pipe, so that the mixed fluid enters the diffusion pipe through the injection pipe, thereby reducing the flow rate of the gas-liquid mixture and increasing the pressure.

[0013] Specifically, the motor is started, the motor drives the pump shaft to rotate, the pump shaft drives the impeller to rotate, a nozzle is formed between adjacent blades of the impeller, the liquid introduction device guides the liquid to the impeller, the liquid is ejected through the nozzle, the ejected liquid is mixed with the gas sucked from the outside by the suction chamber in the mixing chamber, rectified by the injection tube, and then enters the diffusion tube and ejected from the outlet. While the ejected liquid is continuously ejected from the nozzle of the impeller, the liquid is continuously sucked in from the liquid introduction device, and the continuous discharge of the working liquid can continuously suck the gas to achieve the purpose of vacuum suction. In summary, the twin-body pulse jet vacuum pump of the present invention has a compact structure and high integration. It can process two fluids at the same time, improves the gas-liquid mixing and suction efficiency, and thus meets the actual needs of high-load working conditions and space restrictions; the modular design improves the convenience of disassembly and maintenance, stable operation, and has a wide range of industrial application potential. By integrating two impellers into one pump body, the twin-body pulse jet vacuum pump of the present invention realizes the combination of existing designs, avoids the cost investment required for separately designing and trial-producing larger models, and significantly improves the design and manufacturing efficiency.

[0014] 2. The present invention provides a twin-body pulse jet vacuum pump, wherein the liquid introduction device includes a water divider, the water divider includes a straight pipe, the outlet of the straight pipe is connected to a first arc tube and a second arc tube, the first arc tube and the second arc tube are respectively connected to an impeller distributor, and the function of the impeller distributor is to evenly distribute the liquid transported by the water divider to the impeller to ensure that a stable jet can be generated when the impeller rotates at high speed.

[0015] 3. The present invention provides a twin-body pulse jet vacuum pump, in which a plurality of first guide vanes are evenly spaced in the first arc tube and the second arc tube respectively; a plurality of second guide vanes are evenly spaced in the impeller distributor; such an arrangement reduces energy loss and enhances fluid guidance, so that the water divider can evenly introduce the driving liquid into the impeller distributors on both sides through these guide vanes; the two impellers are symmetrically arranged about the water divider, which can increase the stability of the device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a twin-body pulse jet vacuum pump of the present invention;

[0017] Figure 2 It is a transverse cross-sectional view of a twin-body pulse jet vacuum pump of the present invention;

[0018] Figure 3 It is a cross-sectional view of a water separator of a twin-body pulse jet vacuum pump of the present invention;

[0019] Figure 4 It is a cross-sectional view of an impeller distributor of a twin-body pulse jet vacuum pump of the present invention;

[0020] Figure 5 A longitudinal cross-sectional view of a twin-body pulse jet vacuum pump of the present invention;

[0021] Figure 6 A clockwise impeller of a twin-body pulse jet vacuum pump of the present invention;

[0022] Figure 7 for Figure 6 Sectional view of AA in the middle;

[0023] Figure 8 A counterclockwise impeller of a twin-body pulse jet vacuum pump of the present invention;

[0024] Fig. 9 for Figure 8 Partial cross-sectional view of BB.

[0025] The names of the corresponding marks in the accompanying drawings are:

[0026] 1. Pump casing; 2. Motor; 3. Impeller cavity; 4. Mixing chamber; 5. Pump shaft; 6. Impeller; 7. Suction chamber; 8. Injection pipe; 9. Diffuser; 10. Water distributor; 11. Impeller distributor; 12. First guide vane; 13. Second guide vane; 14. Coupling; 15. Blades; 16. Nozzle. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0028] like Figures 1 to 9As shown, a twin-body pulse jet vacuum pump comprises a pump body and a motor 2, wherein the pump body comprises a pump casing 1, a pump shaft 5, a suction chamber 7, a mixing chamber 4, a liquid introduction device, an injection pipe 8 and a diffusion pipe 9; an impeller cavity 3 and two mixing chambers 4 are arranged in the pump casing 1, and the two mixing chambers 4 are both connected to the impeller cavity 3; and the mixing chamber 4 is connected to the injection pipe 8, and the injection pipe 8 is connected to the diffusion pipe 9; the pump shaft 5 is located in the impeller cavity 3, and the pump shaft 5 is rotatably connected to the pump casing 1 through a bearing; the pump shaft 5 is fastened to two impellers 6, and the two impellers 6 are symmetrically arranged about the water divider 10, wherein the two impellers 6 are respectively a clockwise impeller 6 and a counterclockwise impeller 6, so that when the two impellers 6 are installed at both ends of the pump casing 1, the blades 15 of the two impellers 6 have the same rotation direction, thereby increasing stability; the impellers 6 correspond to the mixing chambers 4 one by one, and the impellers 6 adopt streamlines The impeller 6 has a blade 15 of a type, and a nozzle 16 is formed between adjacent blades 15 of the impeller 6 for spraying high-pressure liquid; the output shaft of the motor 2 is connected to the pump shaft 5 through a coupling 14; the suction chamber 7 includes two outlets, one outlet is connected to a mixing chamber 4, and the other outlet is connected to another mixing chamber 4; the liquid introduction device is used to guide the liquid to the impeller 6, and the liquid introduction device includes a water divider 10, the water divider 10 includes a straight pipe, the outlet of the straight pipe is connected to a first arc pipe and a second arc pipe, the first arc pipe and the second arc pipe are respectively connected to an impeller distributor 11, and the impeller distributor 11 is used to evenly distribute the liquid transported by the water divider 10 to the impeller 6; and a plurality of first guide vanes 12 are evenly spaced in the first arc pipe and the second arc pipe respectively; a plurality of second guide vanes 13 are evenly spaced in the impeller distributor 11.

[0029] The specific implementation process is as follows:

[0030] When using the twin-body pulse jet vacuum pump, start the motor 2, the motor 2 drives the pump shaft 5 to rotate, the pump shaft 5 drives the two impellers 6 to rotate, the rotation of the impeller 6 generates centrifugal force, the water separator 10 and the impeller distributor 11 guide the liquid to the impeller 6, and the liquid is sprayed from the nozzle 16 of the impeller 6 to the mixing chamber 4. At the same time, the external gas is sucked into the mixing chamber 4 from the suction chamber 7, and the mixing chamber 4 collects the gas and liquid jets to achieve uniform mixing of gas and liquid. The mixed fluid enters the diffusion pipe 9 through the injection pipe 8 and is discharged to the designated position.

[0031] In summary, the twin-body pulse jet vacuum pump of the present invention has a compact structure and high integration, can process two fluids at the same time, improves the gas-liquid mixing and suction efficiency, and thus meets the actual needs of high-load conditions and space limitations; the modular design improves the convenience of disassembly and maintenance, has stable operation, and has a wide range of industrial application potential. By integrating two impellers 6 into one pump body, the twin-body pulse jet vacuum pump of the present invention realizes the combination of existing designs, avoids the cost investment required for separately designing and trial-producing larger models, and significantly improves the design and manufacturing efficiency.

[0032] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A twin-body pulse jet vacuum pump, characterized in that: The invention comprises a pump body and a motor (2), wherein the pump body comprises a pump casing (1), a pump shaft (5), a suction chamber (7), a mixing chamber (4), a liquid introduction device, an injection pipe (8) and a diffusion pipe (9); an impeller cavity (3) and two mixing chambers (4) are arranged in the pump casing (1), and the two mixing chambers (4) are both connected to the impeller cavity (3); the mixing chamber (4) is connected to the injection pipe (8), and the injection pipe (8) is connected to the diffusion pipe (9); the pump shaft (5) is located in the impeller cavity (3), and the pump shaft (5) is connected to the pump casing. (1) rotatably connected; the pump shaft (5) is tightly connected to two impellers (6), the impellers (6) correspond to the mixing chambers (4) one by one, and nozzles (16) are formed between adjacent blades (15) of the impellers (6) for spraying high-pressure liquid; the output shaft of the motor (2) is connected to the pump shaft (5); the suction chamber (7) includes two outlets, one of the outlets is connected to one of the mixing chambers (4), and the other outlet is connected to the other mixing chamber (4); the liquid introduction device is used to guide the liquid to the impellers (6).

2. The twin-body pulse jet vacuum pump according to claim 1, characterized in that: The liquid introduction device comprises a water distributor (10), the water distributor (10) comprises a straight pipe, the outlet of the straight pipe is connected to a first arc-shaped pipe and a second arc-shaped pipe, the first arc-shaped pipe and the second arc-shaped pipe are respectively connected to an impeller distributor (11), and the impeller distributor (11) is used to evenly distribute the liquid transported by the water distributor (10) to the impeller (6).

3. The twin-body pulse jet vacuum pump according to claim 2, characterized in that: A plurality of first guide vanes (12) are evenly spaced apart in the first arc-shaped tube and the second arc-shaped tube, respectively; and a plurality of second guide vanes (13) are evenly spaced apart in the impeller distributor (11).

4. The twin-body pulse jet vacuum pump according to claim 2, characterized in that: The two impellers (6) are symmetrically arranged with respect to the water separator (10).

Images