WO2020220693A1 - Gas pulser - Google Patents

Abstract

Disclosed is a gas pulser, comprising: a motor as well as a control system, a support frame (4), a housing, an air inlet end cover (8), an air inlet, an air outlet end cover (11), and an air outlet; an elastic connection system; and a rotor pair, which comprises a rotor provided with gas discharge holes and a solid lubrication rotor sleeve also provided with gas discharge holes, and has the function of blocking or allowing passage of gas. The solid lubrication rotor sleeve is fixed and statically mounted in the housing, the rotor is driven to rotate in the solid lubrication rotor sleeve by the motor by means of connection of the elastic connection system, the high-pressure gas pulse frequency is controlled by controlling the rotating speed of the rotor, and the intensity of a gas pulse is controlled by setting the pressure and flow of incoming gas. The gas pulser can successfully avoid the gluing failure problem of a high-speed large-diameter bimetal solid lubricating bearing and effectively reduce the wear failure problem, and can make a high-pressure gas jet generate strong intermittent pulses, thereby obtaining strong sound waves having an adjustable frequency.

Description

Gas pulser

cross reference

This application claims the priority of the Chinese application filed on April 28, 2019, the application number is 201910350944.4, the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to a gas pulser, in particular to a gas pulser applied to the field of strong acoustic waves.

Background technique

In the prior art, gas pulsers (gas pulse generators) have a wide range of applications, and many researches have been done. For example, a method for obtaining gas pulses by high-speed control of the high-pressure gas source switch by a solenoid valve is proposed, and a mechanical rotary pulse gas generator is also proposed.

For the method of obtaining gas pulses through solenoid valves, it is generally believed that there are disadvantages such as unreliable sealing and leakage, limited frequency of solenoid valve high-frequency switching, narrow application range, short life and poor working reliability.

For mechanical rotary pulse gas generators, generally speaking, the structure of the prior art is relatively complicated.

References: Patent documents CN107402194A, CN102966643A

In the prior art, the inventor noticed that there are solid inlaid lubricated bearings, but all solid inlaid lubricated bearings do not have the function of high-pressure gas pulse switching; there are gas pulse switches, but pulse switches cannot simultaneously have excellent sealing performance The bearing function. The applicant has studied the application of bimetal solid lubrication bearings in gas pulsers.

When the gas pulse generator emits high-pressure pulse airflow, the pulse generator rotor is in asymmetrical force state. The high-pressure gas dozens of times the standard atmospheric pressure makes the bearing bear a great radial force, which will also cause excessive wear of the sliding bearing. When the bearing sliding speed level is high and the radial load is also large, the PV value that controls the heat generation of the bearing is also at a high level, and the bearing is very prone to overheating and bonding problems. That is, the application of bimetallic solid lubrication bearings in gas pulsers faces the problems of wear failure and bonding failure at the same time.

Moreover, in the field of strong acoustic wave application technology, especially strong acoustic precipitation enhancement technology, a gas pulse generator with simple structure, reliable and safe performance, and capable of quickly generating powerful continuous gas pulses is required.

Summary of the invention

This application is proposed in view of the above problems, and its purpose is to provide a gas pulser, which can successfully avoid the gluing failure problem of high-speed large-diameter bimetal solid lubricating bearings through clever design, and effectively reduce the wear failure problem.

Another object of the present application is to provide a gas pulser, which can effectively reduce the calorific value of the bimetal oil-free bearing.

The purpose of the present application is also to provide a gas pulser, which can provide strong gas pulse intensity and strong intermittent pulse strong sound waves.

In order to achieve the above objective, a gas pulser according to the present application includes a motor and a control system, a support frame, a housing, an air inlet end cover, an air inlet, an air outlet end cover and an air outlet, and is characterized in that it further includes: An elastic connection system; and a rotor pair, which includes a rotor with a vent hole and a solid lubrication rotor sleeve with the same vent hole, which has a gas stop switch function, and the solid lubrication rotor sleeve is fixed and statically installed in the In the housing, the rotor is driven to rotate in the solid lubrication rotor sleeve by the motor through the elastic connection system, and the high-pressure gas pulse frequency is controlled by controlling the rotation speed of the rotor. Pressure and flow to control the intensity of gas pulse.

According to the gas pulser of the present application, preferably, the rotor adopts a multi-action working mode, that is, a plurality of exhaust holes are opened on the rotor one circle, so that a plurality of gas pulses are generated during the rotation of the rotor one circle.

According to the gas pulser of the present application, preferably, the solid lubrication rotor sleeve adopts a multi-channel parallel operation mode, that is, the solid lubrication rotor sleeve is provided with a plurality of exhaust holes, and one of the exhaust holes faces the outlet The air port is installed, the distribution phase of the multiple exhaust holes on the solid lubrication rotor sleeve in the circumferential direction is the same as the distribution phase of the multiple exhaust holes on the rotor, so that when the rotor is rotating, the multiple pairs The exhaust holes on the rotor and the solid lubrication rotor sleeve are opened at the same time or closed at the same time to realize multi-channel parallel operation and increase the intensity of gas pulse. After the gas is discharged from the multiple exhaust holes of the solid lubrication rotor sleeve , Passing through the air passage between the solid lubrication rotor sleeve and the housing, converging to the air outlet in parallel, and ejecting from the air outlet to form a pulse jet.

According to the gas pulser of the present application, preferably, a one-way thrust ball bearing is installed between the shaft end of the rotor and the housing, so that the rotor can bear the action of high-pressure gas internally, and externally interact with the solid body. The lubricated rotor sleeves only leave a very small gap to produce low resistance torque.

According to the gas pulser of the present application, preferably, the shaft ring of the one-way thrust ball bearing and the shaft end of the rotor adopt an interference fit, and the seat ring of the one-way thrust ball bearing and the housing Use clearance fit.

According to the gas pulser of the present application, preferably, the connection form of the one-way thrust ball bearing with the housing and the rotor shaft enables the shaft ring and the seat ring of the one-way thrust ball bearing to be automatically aligned through balls. To ensure that the bearing is free from radial forces.

According to the gas pulser of the present application, preferably, the plurality of exhaust holes on the rotor and the solid lubrication rotor sleeve are all square holes, and the square holes are evenly distributed in the circumferential direction, and the long sides of the square holes are The axial direction of the rotor and the solid-lubricated rotor sleeve, the length of the square holes on the rotor and the solid-lubricated rotor sleeve are equal, or may not be equal, the short sides of the square holes are along the length of the rotor and the solid-lubricated rotor sleeve In the circumferential direction, the length of the short side of the rotor is smaller than the length of the short side of the solid lubrication rotor sleeve, and the reasonable selection of the length of the short side determines the time ratio between the opening process and the closing process of the high-pressure gas exhaust.

According to the gas pulser of the present application, preferably, the time ratio between the opening process and the closing process of the high-pressure gas exhaust is greater than or equal to 1.

According to the gas pulser of the present application, preferably, a lubricating oil channel is provided on the housing, and the opening of the lubricating oil channel is located directly above the gas pulser housing, so that the rotor shaft end and the housing are installed between The one-way thrust ball bearing can run smoothly for a long time.

According to the gas pulser of the present application, preferably, the elastic connection system includes:

Torque is transmitted between the motor shaft and the rotor through the motor shaft connecting sleeve and the rotor connecting plate, using a cross elastic connection form,

The connecting plate is integrally embedded in the recess of the connecting end of the rotor, and the end of the motor shaft and sleeve is embedded in the inner hole of the connecting plate. A large clearance fit is adopted in a pair of vertical directions, and a large clearance fit is adopted in the other pair of vertical directions. Use small clearance fit to realize cross elastic connection,

The four inner corners of the connecting plate are rounded to relieve stress and increase the fatigue life of the connecting plate.

The connecting plate material is 65Mn spring steel, and the thickness of the connecting plate ranges from 6 to 8 mm.

According to the gas pulser described in the present application, preferably, the motor shaft and the shaft sleeve adopt an integral molding design, the coupling sleeve and the flat key adopt an interference fit, the flat key and the motor shaft adopt a clearance fit, and the motor shaft connects When the shaft sleeve is machined and formed, first use a milling cutter to mill out the U-shaped groove, and then use a broach to pull out the keyway. The motor shaft and sleeve are not designed as blind holes. If you have to design as blind holes, you can cut off the sleeve. , It is designed as two parts, and the two parts are fitted together by interference pressure.

Technical effect:

According to the gas pulser of the present application, since a rotor pair composed of a rotor with exhaust holes and a solid lubrication rotor sleeve with the same exhaust holes is adopted, the rotor adopts a multi-action working mode, and the solid lubrication rotor sleeve adopts multi-channel parallel connection Working mode, therefore, the structure of the present application has both the bearing function with excellent sealing performance and the high-pressure gas pulse switch function, which can successfully avoid the gluing failure problem of the high-speed large-diameter bimetal solid lubricating bearing and effectively reduce the wear failure problem. It can effectively reduce the calorific value of the bimetal oil-free bearing, can cause the high-pressure gas jet to generate strong intermittent pulses, cause strong oscillations in the air near the pulser outlet, and cause the technical effect of strong sound waves with adjustable frequency. It can be used but not It is limited to fields such as rain enhancement, fog elimination and dust removal by strong sound waves.

From the following description of the embodiments in conjunction with the accompanying drawings, the above and/or other aspects of the present application will become clearer and easier to understand.

Description of the drawings

Fig. 1 is a schematic structural diagram of a gas pulser according to the present application.

Fig. 2 is a schematic diagram for explaining the concept of multi-action design according to the present application.

Fig. 3 is a schematic diagram for explaining the concept of multi-channel parallel design according to the present application.

Fig. 4 shows a schematic cross-sectional view of a four-acting, four-channel parallel structure of an embodiment of a gas pulser according to the present application.

Fig. 5 shows a schematic diagram of the realization of the cross elastic connection structure according to the present application.

Fig. 6 shows a schematic diagram of the structure of the motor shaft connecting sleeve according to the present application.

Fig. 7 shows a design example diagram of the gas pulser according to the present application.

Detailed ways

The specific embodiments of the present application are described below in conjunction with the drawings, but the scope of the present application is not limited to the specific embodiments described.

Fig. 1 is a schematic structural diagram of a gas pulser according to the present application. As shown in Figure 1, the structure of the gas pulser of the present application includes: motor assembly 1; fastening bolts 2; housing fastening bolts 3; bracket 4; rotor connecting plate 5; rotor assembly 6; Paper pad 7; inlet end cover 8; housing assembly 9; outlet end cover grease-resistant paper pad 10; outlet end cover 11, etc.

The motor assembly 1 may include a DC servo motor for driving the rotor in the housing of the gas pulse generator of the gas pulser to rotate. The housing fastening bolt 3 is used to fasten the housing of the gas pulse generator of the gas pulser to the bracket (or support frame) 4. The bracket (or support frame) 4 is used to firmly support the motor assembly 1 and the gas pulse generator of the gas pulser. The rotor connecting plate 5 is used to transmit torque between the motor shaft of the motor assembly 1 and the rotor in the gas pulse generator housing of the gas pulse generator through the motor shaft coupling sleeve. The rotor assembly 6 includes a rotor pair, which is composed of a rotor with vent holes and a solid lubrication rotor sleeve also with vent holes, which is located inside the housing of the gas pulse generator of the gas pulser.

Fig. 7 shows a design example diagram of the gas pulser according to the present application. The gas pulser includes an air inlet end cover, an air inlet, an air outlet end cover, an air outlet, a shell, a support frame, and a DC servo motor. In this specification, the inlet end cover, the inlet port, the outlet end cover, the gas outlet, the casing and the components inside the casing are assumed to be the gas pulse generator of the gas pulse generator.

1 and 7, the working principle of the gas pulser of the present application is: continuous high-pressure gas is blown in from the air inlet of the gas pulser, the constant pressure is continuously compressed air, and the motor is driven by a motor to turn on and off. The vented rotor and the vented rotor that are in a static state open and close regularly to form a pulse jet. When there is overlap between the gas pulser rotor opening and the rotor sleeve opening, high-pressure gas forms a pulse jet from the gas pulser through the rotor pair; when the gas pulser rotor opening and the rotor sleeve opening are misaligned, the high-pressure gas is sealed in Inside the gas pulser, jet discontinuities are formed; jets and discontinuities appear repeatedly to form gas pulse jets. The gas pulse is emitted from the gas outlet of the gas pulser.

The gas pulser according to the present application includes a pulser rotor pair, an elastic connection system, a motor, and a control system (not shown). The pulse generation principle is based on a pair of pulser rotor pairs with gas stop switches. The pair is composed of a rotor with a vent hole and a solid lubrication rotor sleeve with the same vent hole. According to the present application, the high-pressure gas pulse frequency can be controlled by controlling the rotating speed of the gas pulser rotor; the intensity of the gas pulse can be controlled by setting the pressure and flow rate of the gas flowing through the pulser. The gas pulser can generate strong intermittent pulses from the high-pressure gas jet, causing strong oscillations in the air near the exit of the pulser, thereby causing strong sound waves.

According to the gas pulser of the present application, the pulser rotor adopts a multi-action working mode. Fig. 2 shows a schematic diagram for explaining the concept of multi-action design according to the present application. As a preferred embodiment, in Fig. 2, the rotor is provided with 3 vents on a circle, so that when the rotor rotates one circle in the direction of the rotation arrow in the housing, 3 gas pulses are generated in the direction of the air flow in the figure. Compared with the single-acting design with only one vent hole on the rotor, the technical effect of this multi-acting design is that the linear velocity of the large-diameter rotor is reduced under a certain pulse frequency, that is, when a certain pulse frequency is obtained When the gas pulses, the rotor only needs to work at a lower speed level, thereby effectively reducing the heat generation of the bimetal oil-free bearing. Generally, when the gas pulse frequency is mHz, the rotor working speed is m/n*60rpm, and n can be designed to be 2, 3, 4, etc. In Figure 2 of this example, n is designed to be 3.

According to the gas pulser of the present application, the solid-lubricated rotor sleeve of the pulser adopts a multi-channel parallel working mode. Fig. 3 shows a schematic diagram for explaining the concept of multi-channel parallel design according to the present application. As shown in Figure 3, the solid lubrication rotor sleeve is fixedly installed in the housing. The rotor rotates in the rotor sleeve according to the rotor rotation direction shown in the figure. There is only a very small gap between the rotor and the solid lubrication rotor sleeve. The rotor sleeve and the housing There are airways between the bodies. As a preferred embodiment, in Figure 3, there are 3 exhaust ports on the rotor sleeve, and 3 exhaust ports on the rotor. The distribution phase of the three exhaust ports on the rotor sleeve in the circumferential direction is the same as that of the rotor. The three exhaust ports on the upper side have the same distribution phase. Among them, the rotor sleeve is fixed and statically installed in the housing, and one of the upper exhaust ports must be installed directly opposite to the gas pulser. When the rotor is rotating in the rotor sleeve, the three pairs of rotors and the exhaust ports on the rotor sleeve will be opened or closed at the same time. After the gas is discharged from the three exhaust ports of the rotor sleeve, it will pass between the rotor sleeve and the shell. The air passages are connected in parallel to the outlet of the pulser, and are ejected from the outlet along the direction of the airflow to form a pulse jet. The technical effect of this multi-channel parallel structure design is: under the same pulsed air flow intensity, the diameter of the rotor can be reduced, that is, when the rotor is rotating, the n pairs of the exhaust ports on the rotor and the rotor sleeve are opened or simultaneously Closed to realize multi-channel parallel operation, thereby increasing the gas pulse intensity. After the gas is discharged from the n exhaust ports of the rotor sleeve, it passes through the air passage between the rotor sleeve and the casing, and is collected in parallel to the pulser outlet, and ejected from the outlet to form a pulse jet. According to this application, n can be designed as 2, 3, 4, etc. In Figure 3 of this example, n is designed to be 3.

FIG. 4 shows a specific embodiment of the gas pulser according to the present application, which is a schematic cross-sectional view of the gas pulse generating part of the gas pulser along the radial direction, and adopts a four-function, four-channel parallel structure. As shown in Figure 4, there are 4 exhaust holes on the rotor sleeve and 4 exhaust holes on the rotor. The distribution phase of the 4 exhaust holes on the rotor sleeve in the circumferential direction is the same as that of the 4 exhaust holes on the rotor. Similarly, the rotor is driven by the motor to rotate around the center of rotation in the solid-lubricated rotor sleeve in the direction of the rotation arrow. Only a very small gap remains between the rotor and the solid-lubricated rotor sleeve. The rotor sleeve is statically fixed in the housing of the gas pulser. An exhaust hole of the sleeve is installed facing the gas outlet of the gas pulser, and an air passage is provided between the rotor sleeve and the casing. When the rotor rotates in the rotor sleeve, the four pairs of exhaust holes on the rotor and the rotor sleeve will be opened or closed at the same time. After the gas is discharged from the four exhaust holes of the rotor sleeve, it will pass between the rotor sleeve and the shell. The air passages are connected in parallel to the outlet of the gas pulser, and ejected from the outlet to form a pulse jet.

According to the present application, both the rotor of the gas pulser and the solid lubrication rotor sleeve are provided with n exhaust holes (ports), n being 2, 3, 4, etc. According to the present application, preferably, all the n exhaust holes (ports) should be designed as square holes, and the square holes are evenly distributed along the circumferential direction. This is because the applicant found that the square hole is the opening method with the highest opening efficiency of the exhaust valve.

According to the present application, the long sides of the square holes are along the axial direction of the rotor and the rotor sleeve. The lengths of the square holes on the rotor and the rotor sleeve are equal or unequal (if unequal will reduce the exhaust efficiency), the longer the better , The longer the length, the greater the opening and closing speed of the exhaust valve, the stronger the discontinuity of the airflow, and the extreme length is limited by the strength and rigidity of the rotor and rotor sleeve. The short side of the square hole is along the circumference of the rotor and the rotor sleeve. Preferably, the length of the short side on the rotor is smaller than the length of the short side on the rotor sleeve. The reasonable choice of the short side length determines the time ratio between the opening process and the closing process of the high-pressure gas exhaust. Reasonable selection of the length ratio of the short side, that is, the length ratio of the short side of the rotor opening to the short side of the rotor sleeve opening, can achieve a good balance between the high-pressure air displacement and the gas pulse intermittent strength.

According to the gas pulser of the present application, preferably, the time ratio between the opening process and the closing process of the high-pressure gas exhaust is greater than or equal to 1. The exhaust valve opening process is defined as the process from the exhaust valve begins to open, to fully open, to begin to close, and finally to fully close. The exhaust valve closing process is defined as the exhaust valve fully closed state. In the design example of the present inventor, when the number of circumferential openings is n=3, the setting range of the exhaust valve opening process angle is 60°～80°, and the setting range of the exhaust valve closing process angle is 60°～40°; When the number of holes n=4, the setting range of the exhaust valve opening process angle is 45°～55°, and the setting range of the exhaust valve closing process angle is 45°～35°.

In the gas pulser of the present application, in order to make the rotor bear the action of high-pressure gas inside, and produce a low resistance torque with only a very small gap between the outside and the solid lubrication rotor sleeve, the rotor shaft end and the housing Install one-way thrust ball bearings. The shaft ring of the one-way thrust ball bearing adopts an interference fit with the rotor shaft end, and the seat ring of the one-way thrust ball bearing adopts a clearance fit between the housing and the housing. The connection form of the one-way thrust ball bearing with the housing and the rotor shaft enables the shaft and seat ring of the one-way thrust ball bearing to realize automatic centering through the balls, ensuring that the bearing is not subjected to radial forces.

The driving torque of the one-way thrust ball bearing is calculated. The calculation method is

Among them, D is the diameter of the bearing, P is the axial pressure of the bearing, and μ is the friction coefficient of the ball bearing. In the design example of this application, with specific values, the calculated driving torque is about 1N·m. This will provide a reference for the selection of the drive motor.

In order to ensure that the one-way thrust ball bearing installed between the rotor shaft end and the housing can run smoothly for a long time, a lubricating oil channel is provided on the pulse transmitter housing, and the lubricating oil channel opening is located in the housing of the pulse generating part of the gas pulser Right above (not shown).

Since the one-way thrust ball bearing itself is a known structure to those skilled in the art, it will not be repeated here.

According to the gas pulser of the present application, the torque is transmitted between the motor shaft and the rotor through the motor shaft connecting sleeve and the rotor connecting plate, and a cross elastic connection is adopted. Fig. 5 shows a schematic diagram of the realization of the cross elastic connection structure according to the present application. As shown in Figure 5, it shows the connection relationship between the motor shaft, the motor shaft sleeve, the flat key, the rotor and the cross elastic plate. For the understanding of the following description, it also shows a large clearance fit in the horizontal direction and a large vertical direction. The meaning of clearance fit.

As shown in Figure 5, the connecting plate is embedded in the recess of the connecting end of the rotor, and the end of the motor shaft and sleeve is embedded in the inner hole of the connecting plate. Large clearance fit is adopted in a pair of vertical directions. A pair of vertical direction adopts small clearance fit to realize cross elastic connection.

In order to increase the fatigue life of the connecting plate, according to the application, the four inner corners of the connecting plate are rounded to relieve stress.

According to this application, the connecting plate material needs to have good elasticity, 65Mn spring steel is selected, and the connecting plate needs to have sufficient strength, so the thickness needs to be greater than 5mm. In the design example of this application, the thickness of the connecting plate ranges from 6 to 8mm .

As shown in Figure 5, the motor shaft and shaft sleeve adopts a one-piece design, and an interference fit is adopted between the shaft sleeve and the flat key. The design effect is that the flat key will not move along the motor shaft. If it moves, it will be affected both front and rear. Restriction: Clearance fit is adopted between the flat key and the motor shaft. The design effect is that the motor shaft is not subject to other forces in a stationary state, which is convenient for replacing the motor.

Fig. 6 shows a schematic diagram of the structure of the motor shaft connecting sleeve according to the present application. Refer to Fig. 6, the U-shaped groove can be milled out with a milling cutter first, and then the key groove can be pulled out with a broach during machining and forming of the motor shaft and sleeve. Considering the processing technology, the coupling sleeve cannot be designed as a blind hole. If you have to design a blind hole, you can also cut off the sleeve and design it into two parts, which are fitted together by interference pressure.

The application is described above with reference to specific embodiments, and it should be understood that the application is not limited to the disclosed specific embodiments. The application can be improved to make changes, substitutions or equivalent configurations, but it is equivalent to the spirit and scope of the application. Therefore, the scope of this application should not be seen as limited by the foregoing description.

Claims (11)

A gas pulser, comprising a motor and a control system, a support frame, a casing, an air inlet end cover, an air inlet, an air outlet end cover and an air outlet, is characterized in that it further includes: Flexible connection system; and The rotor pair, which includes a rotor with vent holes and a solid lubrication rotor sleeve with vent holes, has the function of a gas stop switch, The solid lubrication rotor sleeve is fixedly and statically installed in the housing, and the rotor is driven to rotate in the solid lubrication rotor sleeve by the motor through the elastic connection system, and The high-pressure gas pulse frequency is controlled by controlling the rotation speed of the rotor, and the gas pulse intensity is controlled by setting the pressure and flow rate of the inflowing gas. The gas pulser according to claim 1, characterized in that the rotor adopts a multi-action working mode, that is, a plurality of exhaust holes are opened on a circle of the rotor, so that a plurality of exhaust holes are generated during a rotation of the rotor. Gas pulse. The gas pulser according to claim 2, wherein the solid lubrication rotor sleeve adopts a multi-channel parallel operation mode, that is, the solid lubrication rotor sleeve has a plurality of exhaust holes, one of which is positive For the air outlet installation, the distribution phase of the multiple vent holes on the solid lubrication rotor sleeve in the circumferential direction is the same as that of the multiple vent holes on the rotor, so that when the rotor is rotating In this, multiple pairs of exhaust holes on the rotor and the solid lubrication rotor sleeve are opened or closed at the same time to realize multi-channel parallel operation and increase the intensity of gas pulse. After the air holes are discharged, they pass through the air passage between the solid lubrication rotor sleeve and the housing, and are collected in parallel to the air outlet, and ejected from the air outlet to form a pulse jet. The gas pulser according to claim 1, wherein a one-way thrust ball bearing is installed between the shaft end of the rotor and the housing to make the rotor bear the action of high pressure gas inside and outside Only a very small gap between the solid lubrication rotor sleeve and the solid lubrication rotor sleeve produces a lower resistance torque. The gas pulser of claim 4, wherein the shaft ring of the one-way thrust ball bearing and the shaft end of the rotor adopt an interference fit, and the seat ring of the one-way thrust ball bearing and the A clearance fit is adopted between the shells. The gas pulser according to claim 5, characterized in that the connection form of the one-way thrust ball bearing with the housing and the rotor shaft enables the shaft ring and seat ring of the one-way thrust ball bearing to pass The balls realize automatic centering to ensure that the bearing is not subjected to radial forces. The gas pulser according to claim 3, wherein the plurality of exhaust holes on the rotor and the solid lubrication rotor sleeve are all square holes, and the square holes are evenly distributed along the circumferential direction. The long sides of the square holes are along the axial direction of the rotor and the solid-lubricated rotor sleeve, and the lengths of the square holes on the rotor and the solid-lubricated rotor sleeve are equal or may be different, The short side of the square hole is along the circumference of the rotor and the solid lubrication rotor sleeve. The length of the short side on the rotor is less than the length of the short side on the solid lubrication rotor sleeve. The reasonable choice of the short side length determines the high-pressure gas exhaust. The time ratio between the gas opening process and the closing process. The gas pulser according to claim 7, wherein the time ratio of the opening process and the closing process of the high-pressure gas exhaust is greater than or equal to 1. The gas pulser according to claim 4, wherein a lubricating oil channel is provided on the housing, and the opening of the lubricating oil channel is located directly above the gas pulser housing so that the rotor shaft end and the housing The one-way thrust ball bearing installed between the bodies can run smoothly for a long time. The gas pulser according to claim 1, wherein the elastic connection system comprises: Torque is transmitted between the motor shaft and the rotor through the motor shaft connecting sleeve and the rotor connecting plate, using a cross elastic connection form, The connecting plate is integrally embedded in the recess of the connecting end of the rotor, and the end of the motor shaft and sleeve is embedded in the inner hole of the connecting plate. A large clearance fit is adopted in a pair of vertical directions, and a large clearance fit is adopted in the other pair of vertical directions. Use small clearance fit to realize cross elastic connection, The four inner corners of the connecting plate are rounded to relieve stress and increase the fatigue life of the connecting plate. The connecting plate material is 65Mn spring steel, and the thickness of the connecting plate ranges from 6 to 8 mm. The gas pulser according to claim 10, wherein the motor shaft and the shaft sleeve adopt an integral molding design, the coupling sleeve and the flat key adopt an interference fit, and the flat key and the motor shaft adopt a clearance fit. When machining the motor shaft and bushing, first use a milling cutter to mill out the U-shaped groove, and then use a broach to pull out the keyway. The motor shaft and bushing are not designed as blind holes. If you must design a blind hole, you can The sleeve is cut off from it and designed into two parts, which are fitted together by interference pressure.

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