Novel efficient rotary pulse liquid-gas jet pump and working process of jet pump

Abstract

The invention relates to a novel efficient rotating pulse liquid-gas jet pump and a working process of the jet pump. The jet pump comprises an impeller, a rotating speed controller, a fixing shaft, a first shell, a nozzle, a second shell, a third shell, a suction chamber, a fixing support, a diffusion pipe, an annular sealing ring and a mechanical seal. The nozzle is connected to the second shell, the clamping plates of the first shell and the second shell are embedded into the clamping grooves of the impeller, and the three shells are connected through bolts. The third shell, the suction chamber and the diffusion pipe are connected through threads, and meanwhile a gap between the fixing shaft and the first shell is sealed through a mechanical seal. The speed reducing impeller is supported by the rotating speed controller, and the suction chamber and the diffusion pipe are supported by the support. The jet flow pulse function is achieved through passive rotation of the impeller, and the jet flow rotation characteristic is achieved through impeller outlet protrusions and impeller rotation. And the efficiency of the liquid-gas jet pump is improved under the combined action of jet pulse and jet rotation.

Description

Technical Field

[0001] The present invention relates to a jet pump and its working process, and particularly to a novel high-efficiency rotary pulsed liquid-gas jet pump that combines a nozzle with an impeller to intermittently provide a high-pressure rotary pulsed jet, while increasing the number of inlets of the suction chamber to improve the efficiency of the liquid-gas jet pump and save operating costs. Background Art

[0002] A liquid-gas jet pump is a fluid device that uses the turbulent diffusion effect of a high-speed water jet to suck, mix, and transport low-speed gas. Due to its simple structure, easy processing, stable operation, etc., it is widely used in industries such as agriculture, animal husbandry, fishery, hydropower, and environmental protection. However, due to the limitations of its special structure, the existing liquid-gas jet pump has a large energy loss when the high-speed fluid mixes with the sucked gas. In actual operation, the overall energy transfer efficiency of the liquid-gas jet pump is only about 15%-30%, which limits its further popularization and use.

[0003] Existing research shows that using pulsed jets can improve the efficiency of jet pumps. This is mainly because the jet head of each jet continuously passes through the suction chamber of the jet pump and enters the throat. There is a large low-pressure area near the jet head, which can minimize the vacuum degree of the suction chamber and increase the suction volume of the sucked gas. In addition, since the throat is the position with the lowest pressure in the jet pump, a large amount of sucked gas will accumulate there. When the jet passes through the throat intermittently, it will press the sucked gas into the diffuser tube to achieve a higher energy transfer.

[0004] In addition, existing research has also observed that if the jet ejected from the nozzle rotates, converting the conventional jet into a rotary jet, then this form of jet will be able to further enhance the entrainment and mixing effects of the jet compared to the non-rotating jet. Therefore, the rotary jet will also improve the efficiency of the liquid-gas jet pump. However, there is currently no jet pump that can make the jet simultaneously satisfy the pulsed and rotary effects. Summary of the Invention

[0005] In view of the above problems, the main object of the present invention is to provide a novel high-efficiency rotary pulsed liquid-gas jet pump that combines a nozzle with an impeller to intermittently provide a high-pressure rotary pulsed jet, while increasing the number of inlets of the suction chamber to improve the efficiency of the liquid-gas jet pump and save operating costs.

[0006] The present invention solves the above technical problems through the following solution: A novel high-efficiency rotary pulsed liquid-gas jet pump, the novel high-efficiency rotary pulsed liquid-gas jet pump includes: a pump body, a speed controller, a fixed shaft, a suction chamber, a fixed bracket, and a diffuser tube.

[0007] The pump body includes a first housing, a second housing, and a third housing. The second housing is a housing provided with an annular region and is located between the first housing and the third housing. The first housing, the second housing, and the third housing form a cavity for installing the impeller.

[0008] A nozzle for cooperating with the impeller is provided on the second housing, and the speed controller is fixed on the first housing.

[0009] The impeller is provided with an impeller inlet and an impeller outlet. When assembling the impeller, the first nozzle is aligned with a certain inlet of the impeller, and the high-pressure fluid ejected from the first nozzle can impact the convex surface of a certain inlet of the impeller, driving the impeller to rotate passively.

[0010] The speed controller supports the fixed shaft, and the fixed shaft passes through the first housing and enters the cavity. The fixed bracket supports the suction chamber and the diffuser pipe; the third housing is connected to one end of the suction chamber, and the diffuser pipe passes through the bracket and is connected to the other end of the suction chamber.

[0011] In a specific embodiment of the present invention, the impeller includes an impeller inlet, an impeller outlet, an impeller flow path, and an impeller outlet protrusion.

[0012] When the impeller inlet rotates to the cavity position, the high pressure in the cavity will cause the fluid in the cavity to accelerate into the impeller inlet and spray out at a high speed at the impeller outlet. In addition, the nozzle will continue to spray liquid until the impeller inlet rotates out of the position where the cavity is located again.

[0013] When neither of the impeller inlets rotates to the cavity position, the jet ejected from the nozzle will gather in the cavity, resulting in the pressure in the cavity being greater than the nozzle outlet pressure, and finally causing no jet to be ejected from the nozzle.

[0014] In the flow path near the impeller outlet, there is an impeller outlet protrusion; when the impeller rotates, the impeller outlet protrusion near the impeller outlet will provide a tangential force to the jet, driving the jet to rotate and playing a role in enhancing the jet entrainment and mixing.

[0015] The included angle θ of the impeller flow path is in the range of 120 - 150°, the impeller inlet angle α is in the range of 18 - 30°, and the impeller outlet angle β is in the range of 85 - 95°.

[0016] The ratio of the outlet area of the nozzle to the outlet area of the impeller is 1.5 - 2:1.

[0017] In a specific embodiment of the present invention, the first housing includes a first flange hole and a fixing ring; during installation, the fixed shaft passes through the fixing ring of the first housing and enters the cavity, and the first flange hole is cooperatively installed with the second housing and the third housing.

[0018] In a specific embodiment of the present invention, an external thread of the nozzle, a first sealing groove are provided on the nozzle, and an internal thread of the second housing, a second sealing groove are provided on the second housing; the internal thread of the second housing is engaged with the external thread of the nozzle on the nozzle, the second sealing groove is engaged with the nozzle sealing groove on the nozzle, and an annular sealing ring is provided between the second housing sealing groove and the nozzle sealing groove.

[0019] In a specific embodiment of the present invention, a concave end face of the third housing and a convex end face of the third housing are provided on the third housing, the concave end face of the third housing is engaged with the convex end face of the second housing on the side end face of the second housing, the roughness of the convex end face of the third housing and the side end face of the second housing shall not be greater than 1.6 μm, and the clearance between the convex end face of the third housing and the outer wall of the impeller is 0.05 - 0.1 mm.

[0020] In a specific embodiment of the present invention, the diffusion angle γ of the diffuser tube is in the range of 10 - 15°.

[0021] In a specific embodiment of the present invention, after the first housing and the second housing are assembled, a cavity including a certain inlet of the impeller will be formed, and the remaining inlets of the impeller are sealed by the first clamping plate and the third clamping plate of the first housing and the second housing after assembly; the clearance between the outer wall of the impeller and the first housing and the second housing is 0.05 - 0.1 mm.

[0022] In a specific embodiment of the present invention, there are 4 evenly distributed air inlet holes in the suction chamber, the flow channels of the air inlet holes are bent towards the throat position, and it is ensured that the extension line of the center line of each air inlet hole is at the center position of the throat.

[0023] In a specific embodiment of the present invention, the ratio of the outlet area of the nozzle to the outlet area of the impeller is 1.5 - 2:1.

[0024] The working process of a new type of high - efficiency rotary pulsed liquid - gas jet pump, the working process includes:

[0025] (1). During the assembly process, ensure that a certain inlet of the impeller is facing the nozzle, the high - pressure fluid enters the cavity formed by the first housing and the second housing through the nozzle, and then impacts on the convex surface flow channel of the impeller. The impeller is driven to rotate passively under the action of the jet impact force, and the subsequent jet will squeeze and impact the jet on the impeller flow channel, and squeeze the jet into the rotating impeller; since the outlet area of the impeller is smaller than its inlet area, the jet pressure energy will gradually be converted into velocity energy and be ejected at high speed from the impeller outlet.

[0026] (2) When the impeller inlet rotates past the cavity, the liquid ejected from the nozzle will accumulate in the cavity. As the amount of liquid accumulation increases, the pressure in the cavity will gradually rise until it is equivalent to the pressure at the nozzle outlet. At this time, the jet at the nozzle outlet is sealed by the pressure in the cavity and no longer ejects a jet; the impeller continues to rotate, and the adjacent impeller inlet gradually coincides with the cavity. The water flow in the cavity will, under the action of pressure, impact the impeller flow passage at high speed; during the process of impacting the impeller flow passage, the water flow will also enter the impeller flow passage due to the extrusion of the subsequent jet, thereby completing the high-pressure jet process.

[0027] (3) Since the pressure energy in the cavity is consumed and is not sufficient to seal the jet of the first nozzle, the jet in the first nozzle will continue to spray into the cavity; the above process repeats continuously, that is: when the impeller inlet rotates to the cavity position, high-speed jets will be ejected from the first nozzle and the impeller outlet, and when the impeller inlet does not rotate to the cavity position, no high-speed jets will be ejected from the first nozzle and the impeller outlet; in this way, a pulsed jet is formed.

[0028] The positive and progressive effects of the present invention are as follows: The novel and efficient rotary pulsed liquid-gas jet pump provided by the present invention has the following advantages:

[0029] (1) By utilizing the passive rotation of the impeller and the protrusion at the impeller outlet to provide a tangential force for the jet, the jet rotates circumferentially during the operation in the suction chamber, which can increase the ability to entrain and mix gas.

[0030] (2) By utilizing the cavity formed after the assembly of the nozzle, the passive rotation of the impeller, and the first housing and the second housing, pulsed jet can be spontaneously achieved without relying on a pulse signal or a piston pump.

[0031] (3) Due to the special design of the flow passage at the inlet of the suction chamber, the gas entering from the inlet of the suction chamber can directly reach the throat position.

[0032] (4) Since the present invention can achieve pulsed jet, a low-pressure area will be formed at the head of each jet, improving the effect of entraining gas. In addition, each jet has the function of a piston, and the gas that has not been entrained or mixed will be forcibly squeezed into the diffuser pipe under the extrusion of the liquid column of each jet until it is discharged from the jet pump. This method can greatly improve the gas suction efficiency of the jet pump. In addition, because the gas is squeezed by the jet liquid column, there is no need to consider the length of the throat, that is, there is no need to consider whether the gas is completely mixed. Brief Description of the Drawings

[0033] Figure 1 is the overall structural schematic diagram of the jet pump proposed by the present invention.

[0034] Figure 2 is Figure 1 the structural schematic diagram of the A-A direction cross-section of

[0035] Figure 3 is Figure 1 The structural schematic diagram of the B-B direction section view.

[0036] Figure 4 is the structural schematic diagram of the nozzle in the present invention.

[0037] Figure 5 is the structural schematic diagram of the first outer shell in the present invention.

[0038] Figure 6 is the structural schematic diagram of the second outer shell in the present invention.

[0039] Figure 7-1 is the structural schematic diagram of the third outer shell in the present invention.

[0040] Figure 7-2 is the partial sectional schematic diagram of the third outer shell in the present invention.

[0041] Figure 8-1 is the structural schematic diagram of the impeller in the present invention (external structure).

[0042] Figure 8-2 is the structural schematic diagram of the impeller in the present invention (internal structure).

[0043] Figure 9-1 is one of the structural schematic diagrams of the impeller flow passage in the present invention.

[0044] Figure 9-2 is the other structural schematic diagram of the impeller flow passage in the present invention.

[0045] Figure 10 is the structural schematic diagram of the suction chamber in the present invention.

[0046] Figure 11 is the structural schematic diagram of the diffuser in the present invention.

[0047] The following are the names corresponding to the reference numerals in the present invention:

[0048] Speed controller 2, fixed shaft 3, fixed bracket 9, annular sealing ring 11, mechanical seal 12;

[0049] Impeller 1, impeller inlet 101, impeller clamping grooves 102 and 103, impeller outlet 104, impeller internal thread 105, first flow channel 106, impeller outlet protrusion 107;

[0050] First outer shell 4, first clamping plate 401, second clamping plate 402, first flange hole 403, fixing ring 404;

[0051] Nozzle 5, first sealing groove 501, first nozzle external thread 502, second nozzle external thread 503;

[0052] The second housing 6, the third clamping plate 601, the internal thread 602 of the second housing, the second sealing groove 603; the second flange hole 604, the fourth clamping plate 605;

[0053] The third housing 7, the third flange hole 701, the external thread 702 of the third housing, the third sealing groove 703, the convex end face 704, the concave end face 705;

[0054] The suction chamber 8, the front-end sealing groove 801, the first internal thread 802 of the suction chamber, the second flow channel 803, the air inlet hole 804, the throat 805, the external thread 806 of the suction chamber, the rear-end sealing groove 807;

[0055] The diffuser 10, the internal thread 1001 of the diffuser, the fourth sealing groove 1002. Specific embodiments

[0056] The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0057] The present invention provides a new type of high-efficiency rotary pulsed liquid-gas jet pump. As shown in the above figure, the present invention includes an impeller 1, a speed controller 2, a fixed shaft 3, a first housing 4, a nozzle 5, a second housing 6, a third housing 7, a suction chamber 8, a fixed bracket 9, a diffuser 10, an annular sealing ring 11, and a mechanical seal 12. The nozzle 5 is connected to the internal thread 602 of the second housing 6 through the external thread 502 of the first nozzle. There are a second sealing groove 603 and a first sealing groove 501 between the second housing 6 and the nozzle 5. The annular sealing ring 11 is embedded in the second sealing groove 603 and the first sealing groove 501 to prevent liquid leakage. The second clamping plate 402 and the fourth clamping plate 605 of the first housing 4 and the second housing 6 are embedded in the impeller slot of the impeller 1 ( Figure 8-1 and 8-2Inside the first housing 4, the second housing 6, and the third housing 7 (102, 103), and the first housing 4, the second housing 6, and the third housing 7 are connected by bolts. The mechanical seal 12 is press-fitted onto the fixed shaft 3 and the first housing 4, and the impeller 1 is connected to one end of the fixed shaft 3 using the internal thread 105 of the impeller within the impeller 1. The other end of the fixed shaft 3 is connected inside the speed controller 2. The speed controller 2 is fixed within the fixing ring 404 of the first housing 4, serving to support and decelerate the impeller 1. The third housing 7 is connected to the suction chamber 8 through the external thread 702 of the third housing and the internal thread 802 of the suction chamber of the suction chamber 8. There is a third seal groove 703 and a front-end seal groove 801 between the third housing 7 and the suction chamber 8. The annular sealing ring 11 is embedded within the third seal groove 703 and the front-end seal groove 801 to prevent liquid leakage. The diffuser tube 10 passes through the support 9 and is connected to the suction chamber 8 through the internal thread 1001 of the diffuser tube 10 and the external thread 806 of the suction chamber of the suction chamber 8. There is a fourth seal groove 1002 and a rear-end seal groove 807 between the diffuser tube 10 and the suction chamber 8. The annular sealing ring 11 is embedded within the fourth seal groove 1002 and the rear-end seal groove 807 (see Figure 10 and Figure 2 ).

[0058] After the first housing 4 and the second housing 6 are assembled, only a cavity containing a certain inlet 101 of the impeller 1 will be formed, and the remaining impeller inlets 101 are sealed by the first clamping plate 401 and the third clamping plate 601 of the assembled first housing 4 and second housing 6. In addition, the gap between the outer wall of the impeller 1 and the first housing 4 and the second housing 6 is 0.05 - 0.1 mm.

[0059] The flange holes of the first housing 4, the second housing 6, and the third housing 7 shall not be less than 6, see Figure 3 , 5 , 7.

[0060] When assembling the impeller 1, ensure that the nozzle 5 is facing a certain impeller inlet 101 of the impeller 1, ensuring that the high-pressure fluid ejected from the nozzle 5 can impact the convex surface of a certain impeller inlet 101 of the impeller 1, driving the impeller to rotate passively.

[0061] Ensure that the flow area S1 of the impeller inlet is approximately 5 - 7 times the flow area S2 of the outlet (see Figure 9-2 ); at the same time, ensure that the volume of the liquid ejected from the nozzle 5 should be greater than 1.5 - 2 times the volume of the cavity formed after the first housing 4 and the second housing 6 are combined. Then, the maximum rotational speed of the impeller controlled by the speed controller 2 should satisfy:

[0062]

[0063] In the above formula, n is the rotational speed of the impeller, r / min; Q is the volume flow rate ejected from the first nozzle, m 3 / s; δ is the included angle between the connecting lines of the two farthest endpoints at a certain impeller inlet and the impeller center; V is the volume of the cavity, m 3 。

[0064] In the specific implementation process, the volume of water stored in the cavity of the present invention should be 2 - 3 times the volume of a single impeller flow channel, and the purpose is to provide greater jet velocity energy.

[0065] In the specific implementation process, when none of the impeller inlets 101 of the impeller 1 rotate to the cavity position in the present invention, the jets ejected from the nozzle 5 will gather in the cavity, resulting in the pressure in the cavity being greater than the outlet pressure of the nozzle 5, and finally causing the nozzle 5 to no longer eject jets.

[0066] In the specific implementation process, when the impeller inlet 101 of the impeller 1 rotates to the cavity position in the present invention, the high pressure in the cavity will cause the fluid in the cavity to accelerate into the impeller inlet 101 and be ejected at a high speed at the impeller outlet 104. In addition, the first nozzle 5 will continue to eject liquid until the impeller inlet 101 rotates out of the position where the cavity is located again.

[0067] In the specific implementation process, in the flow channel near the impeller outlet 104 of the present invention, there is an impeller outlet protrusion 107. When the impeller 1 rotates, the impeller outlet protrusion 107 near the impeller outlet 104 will provide a tangential force to the jet, drive the jet to rotate, and play a role in enhancing the jet entrainment and mixing.

[0068] In the specific implementation process, the included angle θ of the impeller flow channel 106 of the present invention should be in the range of 120 - 150°, the impeller inlet angle α should be in the range of 18 - 30°, and the impeller outlet angle β should be in the range of 85 - 95°. See Figure 9-2 。

[0069] In the specific implementation process, the ratio of the outlet area of the nozzle 5 to the outlet area of the impeller 1 of the present invention is 1.5 - 2:1, and the purpose is to increase the jet velocity injected into the suction chamber 8.

[0070] There is a mating surface between the concave end face 705 of the third housing 7 and the side end face of the second housing 6. The surface roughness of the convex end face 704 and the side end face of the second housing 6 shall not be greater than 1.6 μm. In addition, the gap between the convex end face 704 of the third housing 7 and the outer wall of the impeller 1 is 0.05 mm - 0.1 mm.

[0071] There are 4 evenly distributed air intake holes 804 in the suction chamber 8 of the present invention. The flow channels of the air intake holes 804 bend towards the throat 805, and it is ensured that the extension lines of the centerlines of each air intake hole 804 are at the center position of the throat 805.

[0072] In the specific implementation process, the diffusion angle γ of the diffuser 10 of the present invention is in the range of 10 - 15°. SeeFigure 11 。

[0073] In the specific implementation process, the sealing grooves formed after the combination of the two components in the jet pump of the present invention should be coaxial and of the same size.

[0074] The working principle of a novel high-efficiency rotary pulsed liquid-gas jet pump provided by the present invention is as follows: During the assembly process, ensure that a certain inlet of the impeller 1 is directly opposite to the first nozzle 5. The high-pressure fluid enters the cavity formed by the first housing 4 and the second housing 6 through the nozzle 5, and then impacts on the convex surface flow path of the impeller 1. The impeller 1 is driven to rotate passively under the action of the jet impact force, and the subsequent jet will squeeze and impact the jet on the impeller flow path and squeeze it into the rotating impeller. Since the outlet area of the impeller is smaller than its inlet area, the jet pressure energy will gradually be converted into velocity energy and be ejected at high speed from the impeller outlet.

[0075] When the impeller inlet rotates past the cavity, the liquid ejected from the first nozzle will accumulate in the cavity. As the liquid accumulation increases, the pressure in the cavity will gradually rise until it is equivalent to the nozzle outlet pressure. At this time, the jet at the nozzle outlet is sealed by the pressure in the cavity and no longer ejects the jet. The impeller continues to rotate, and the adjacent impeller inlets gradually coincide with the cavity. The water flow in the cavity will, under the action of pressure, impact the impeller flow path at high speed. During the process of impacting the impeller flow path, the water flow will also enter the impeller flow path due to the extrusion of the subsequent jet, and then complete the high-pressure jet process. Subsequently, since the pressure energy in the cavity is consumed and is not sufficient to seal the jet of the first nozzle, the jet in the first nozzle will continue to spray into the cavity. The above process is repeated continuously, that is: when the impeller inlet rotates to the cavity position, high-speed jets will be ejected from the first nozzle and the impeller outlet; when the impeller inlet does not rotate to the cavity position, no high-speed jets will be ejected from the first nozzle and the impeller outlet. In this way, pulsed jets are formed.

[0076] Due to the special inlet flow path of the suction chamber, a large amount of gas accumulates near the throat position. After the first pulsed jet is ejected from the impeller outlet, the pressure at the head of the jet is the lowest on the entire jet surface and there are large vortices around the head of the jet, resulting in more air being entrained by the jet under the premise of a constant pressure at the inlet of the suction chamber and entering the throat, while the air not entrained is squeezed into the throat under the action of the jet extrusion. This phenomenon occurs cyclically under the action of the pulsed jet.

[0077] When the impeller inlet rotates to the cavity position, during the process of the high-speed jet being ejected from the impeller outlet, due to the presence of a convex structure at the impeller outlet and the rotation of the impeller, the jet will be subjected to a tangential force and a jet rotation phenomenon will occur. The jet rotation phenomenon will further entrain the gas in the suction chamber.

[0078] Based on the above process, the efficiency of the liquid-gas jet pump will be greatly improved.

[0079] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A novel and efficient rotary pulsed liquid-gas jet pump, characterized in that: The novel high-efficiency rotary pulsed liquid-gas jet pump includes: a pump body, a rotational speed controller, a fixed shaft, a suction chamber, a fixed bracket, and a diffuser tube; The pump body includes a first outer shell, a second outer shell, and a third outer shell. The second outer shell is an outer shell provided with an annular region, and the second outer shell is located between the first outer shell and the third outer shell. The first outer shell, the second outer shell, and the third outer shell form a cavity for installing an impeller; A nozzle for cooperating with the impeller is provided on the second outer shell, and the rotational speed controller is fixed on the first outer shell; The impeller is provided with an impeller inlet and an impeller outlet. When assembling the impeller, a first nozzle is aligned with a certain inlet of the impeller, and the high-pressure fluid ejected from the first nozzle can impact the convex surface of a certain inlet of the impeller, driving the impeller to rotate passively; The rotational speed controller supports the fixed shaft. The fixed shaft passes through the first outer shell and enters the cavity. The fixed bracket supports the suction chamber and the diffuser tube; One end of the third outer shell is connected to the suction chamber, and the diffuser tube passes through the bracket and is connected to the other end of the suction chamber.

2. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 1, wherein: The impeller includes an impeller inlet, an impeller outlet, an impeller flow channel, and an impeller outlet protrusion; When the impeller inlet rotates to the cavity position, the high pressure in the cavity will cause the fluid in the cavity to accelerate into the impeller inlet and spray out at high speed at the impeller outlet. In addition, the nozzle will continue to spray liquid until the impeller inlet rotates out of the cavity position again; When the impeller inlets do not rotate to the cavity position, the jets ejected by the nozzle will gather in the cavity, resulting in the pressure in the cavity being greater than the nozzle outlet pressure, and finally causing no jets to be ejected from the nozzle; In the flow channel near the impeller outlet, there is an impeller outlet protrusion; When the impeller rotates, the impeller outlet protrusion near the impeller outlet will provide a tangential force to the jet, driving the jet to rotate, which plays a role in enhancing the jet entrainment and mixing; The included angle θ of the impeller flow channel is in the range of 120 - 150°, the impeller inlet angle α is in the range of 18 - 30°, and the impeller outlet angle β is in the range of 85 - 95°; The ratio of the outlet area of the nozzle to the outlet area of the impeller is 1.5 - 2:

1.

3. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 1, wherein: The first outer shell includes a first flange hole and a fixing ring; During installation, the fixed shaft passes through the fixing ring of the first outer shell and enters the cavity, and the first flange hole is cooperatively installed with the second outer shell and the third outer shell.

4. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 1, wherein: The nozzle is provided with an external nozzle thread and a first sealing groove. The second outer shell is provided with an internal second outer shell thread and a second sealing groove; The internal second outer shell thread cooperates with the external nozzle thread on the nozzle, and the second sealing groove cooperates with the nozzle sealing groove on the nozzle. An annular sealing ring is provided between the second outer shell sealing groove and the nozzle sealing groove.

5. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 2, wherein: The third outer shell is provided with a third outer shell concave end face and a third outer shell convex end face. The third outer shell concave end face cooperates with the second outer shell convex end face of the side end face of the second outer shell. The roughness of the third outer shell convex end face and the side end face of the second outer shell shall not be greater than 1.6 μm, and the gap between the third outer shell convex end face and the outer wall of the impeller is 0.05 - 0.1 mm.

6. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 2, wherein: The diffusion angle γ of the diffuser tube is in the range of 10 - 15°.

7. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 2, wherein: After the first housing and the second housing are assembled, a cavity containing a certain inlet of the impeller is formed, and the other inlets of the impeller are sealed by the first clamping plate and the third clamping plate of the first housing and the second housing after assembly; the gap between the outer wall of the impeller and the first housing and the second housing is 0.05 - 0.1 mm.

8. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 1, characterized in that: There are 4 evenly distributed air inlet holes in the suction chamber. The flow channels of the air inlet holes bend towards the throat position, and it is ensured that the extension line of the center line of each air inlet hole is at the center position of the throat.

9. The novel high-efficiency rotary pulsed liquid-gas jet pump according to claim 1, characterized in that: The ratio of the outlet area of the nozzle to the outlet area of the impeller is 1.5 - 2:

1.

10. The working process of a new type of high-efficiency rotary pulsed liquid-gas jet pump is characterized in that: The said working process includes: (1) During the assembly process, ensure that a certain inlet of the impeller is facing the nozzle. The high-pressure fluid enters the cavity formed by the first housing and the second housing through the nozzle, and then impacts on the convex flow channel of the impeller. The impeller is driven to rotate passively under the action of the jet impact force, and the subsequent jet will squeeze the jet impacting on the impeller flow channel and squeeze the jet into the rotating impeller; since the outlet area of the impeller is smaller than its inlet area, the jet pressure energy will gradually be converted into velocity energy and be ejected at high speed from the impeller outlet. (2) When the impeller inlet rotates past the cavity, the liquid ejected from the nozzle will accumulate in the cavity. As the liquid accumulation increases, the pressure in the cavity will gradually increase until it is equivalent to the nozzle outlet pressure. At this time, the jet at the nozzle outlet is sealed by the pressure in the cavity and no longer ejects the jet; the impeller continues to rotate, and the adjacent impeller inlets gradually coincide with the cavity. The water flow in the cavity will, under the action of pressure, impact the impeller flow channel at high speed; during the process of impacting the impeller flow channel, the water flow will also enter the impeller flow channel due to the extrusion of the subsequent jet, and then complete the high-pressure jet process. (3) Since the pressure energy in the cavity is consumed and is not sufficient to seal the jet of the first nozzle, the jet in the first nozzle will continue to spray into the cavity; the above process is repeated continuously, that is: when the impeller inlet rotates to the cavity position, high-speed jets will be ejected from the first nozzle and the impeller outlet, and when the impeller inlet does not rotate to the cavity position, no high-speed jets will be ejected from the first nozzle and the impeller outlet; thus, a pulsed jet is formed.

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