Noise reduction device for vacuum pump and using method of noise reduction device

Abstract

The noise reduction device for the vacuum pump comprises a pump shell and a motor, an output shaft of the motor movably penetrates through the pump shell and is fixedly connected with an impeller, and the pump shell is fixedly communicated with an air inlet pipe and an air outlet pipe. Gas in the annular cavity is extracted through equipment, the interior of the portion, outside the impeller, of the pump shell is in a vacuum state, so that the vacuum noise reduction effect on the impeller is achieved, the gas is guided through a second annular groove, the gas passes through a plurality of second noise reduction holes, noise of gas flowing sound of the gas inlet pipe is reduced, and on the contrary, the noise is reduced. The air outlet unit is used for reducing noise of air flowing sound of the air outlet pipe, lubricating oil is injected into the round box through the oil bag, the output shaft of the motor is lubricated and reduced in noise, the overall structure is matched with one another, the multi-targeted noise reduction effect of equipment is achieved, the noise influence in the use process of the equipment is greatly reduced, the injection amount of the lubricating oil can be controlled in a timing mode, and the service life of the equipment is prolonged. And the operation stability and the service life of equipment connection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pump noise reduction, and in particular to a vacuum pump noise reduction device and a use method thereof. Background Art

[0002] A vacuum pump is a device for obtaining a vacuum. It discharges the gas in a container through various means to reduce the pressure. It is widely used in the fields of electronics, chemical industry, medicine, etc. It can provide the required low-pressure environment for production and scientific research, ensure the smooth progress of the process, improve product quality and experimental accuracy, and is an indispensable and important tool in modern industry.

[0003] It is common for vacuum pumps to generate noise during use. The noise mainly comes from the operation of the motor, friction of internal mechanical parts and gas flow, etc. Excessive noise may affect the working environment and personnel health.

[0004] In the prior art, when using a vacuum pump, a shell is mostly provided on the outside of the vacuum pump to reduce the noise of the vacuum pump. However, when the vacuum pump is connected to an external device, the air inlet and outlet are both provided outside the shell, resulting in the flow of the inlet and outlet gases still generating noise, making the equipment lack a targeted noise reduction effect. At the same time, if the output shaft of the motor lacks lubrication during operation, the friction between the components will increase, thereby generating more friction noise. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above-mentioned existing noise reduction device for a vacuum pump and the use method thereof, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a noise reduction device for a vacuum pump and a method of using the same, in order to solve the problem that "when using a vacuum pump, most of the time a shell is set on the outside of the vacuum pump to perform noise reduction on the vacuum pump. However, when the vacuum pump is connected to an external device, the air inlet and outlet are both set outside the shell, resulting in the flow of inlet and outlet gases still generating noise, making the equipment lack targeted noise reduction effect. At the same time, if the output shaft of the motor lacks lubrication during operation, the friction between the components will increase, thereby generating more friction noise."

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: including:

[0009] The main unit comprises a pump housing and a motor, wherein the output shaft of the motor movably passes through the pump housing and is fixedly connected to an impeller, and the pump housing is respectively fixedly connected to an air inlet pipe and an air outlet pipe;

[0010] The air outlet unit comprises a first port block, the first port block is fixedly connected in the air outlet pipe, a first cross plate is fixedly connected in the first port block, a first elastic rope is fixedly connected to a side of the first cross plate away from the impeller, the other end of the first elastic rope is fixedly connected to a first movable block, the first movable block is movably arranged in the first port block, a first annular groove is provided in the first port block, and a first annular groove has a plurality of first noise reduction holes formed in an annular shape on an inner wall of one side thereof;

[0011] The air intake pipe is provided with an air intake component for reducing the noise of vacuum air intake, the air intake pipe is provided with a vacuum component for reducing the noise of impeller rotation, the pump housing is provided with an oil injection component for lubricating the motor output shaft, the pump housing is provided with a drive component for quantitative oil injection, and the pump housing is provided with an opening and closing component for opening and closing the oil injection channel.

[0012] As a preferred embodiment of the noise reduction device for a vacuum pump described in the present invention, the air intake assembly includes a second port block, the second port block is fixedly connected to the air intake pipe, a second cross plate is fixedly connected inside the second port block, a second elastic rope is fixedly connected to a side of the second cross plate close to the impeller, the other end of the second elastic rope is fixedly connected to a second movable block, the second movable block is movably arranged in the second port block, a second annular groove is opened in the second port block, and a plurality of second noise reduction holes are opened in a ring-shaped inner wall on one side of the second annular groove.

[0013] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, the vacuum component includes a conduit, which is fixedly connected to the air inlet pipe, an annular cavity is opened in the pump housing, and the other end of the conduit is connected to the annular cavity, the second movable block is fixedly connected to a vertical rod on one side close to the impeller, and the bottom end of the vertical rod is fixedly connected to a piston plate, the piston plate is movably arranged in the air inlet pipe, the second movable block is fixedly connected to an arc-shaped porous block on one side close to the impeller, and the outer ring surface of the arc-shaped porous block fits with the inner wall of the air inlet pipe.

[0014] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, the oil injection assembly includes a circular plate, which is rotatably connected to the pump casing, and a plurality of oil bags are fixedly connected in an annular shape on the circular plate, a leakage hole is opened on the pump casing, and a conical tube is movably arranged in the leakage hole, and the output shaft sleeve of the motor is provided with a circular box, which is fixedly connected to an inner wall of one side of the pump casing, and an oil pipe is fixedly connected to the circular box, and the oil pipe and the conical tube match each other, and a return pipe is fixedly connected to the circular box, and the other end of the return pipe movably passes through the circular plate.

[0015] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, the driving assembly includes a gear ring, which is rotatably connected to the pump housing and fixedly connected to the circular plate. The air inlet pipe and the second port block are jointly provided with a movable port, the second movable block is fixedly connected to a connecting plate, the inner walls on both sides of the connecting plate are jointly hinged with gear blocks, the gear blocks are meshed with the gear ring, and a stopper is fixedly connected to the inner wall of one side of the connecting plate.

[0016] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, the opening and closing component includes an arc-shaped plate, which is movably arranged in the annular cavity, and a long groove is opened on the inner wall of one side of the annular cavity, and an inclined hollow block is movably connected in the long groove, and the inclined hollow block is fixedly connected to the arc-shaped plate.

[0017] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, wherein: support plates are fixedly connected to the pump housing and the motor, and the bottom surfaces of the two support plates are arranged in a uniform horizontal plane.

[0018] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, a groove is provided on one side of the two support plates away from the pump casing, a damper is fixedly connected to the inner wall of one side of the two grooves, and a shock-absorbing suction cup is fixedly connected to the telescopic ends of the two dampers, and a spring is sleeved on the two dampers, and the two ends of the spring are respectively fixedly connected to the corresponding groove and the shock-absorbing suction cup.

[0019] As a preferred solution of the noise reduction device for a vacuum pump described in the present invention, an air inlet nozzle is fixedly connected to the pump housing, and an electromagnetic valve is arranged on the air inlet nozzle.

[0020] A method for using a noise reduction device for a vacuum pump, the method for using a noise reduction device for a vacuum pump is applicable to any of the above noise reduction devices for a vacuum pump, and the method for using a noise reduction device for a vacuum pump comprises the following steps:

[0021] Step 1: When using a vacuum pump to reduce noise, connect the vacuum pump to an external vacuum device through the air inlet pipe, and then use the motor to drive the impeller to rotate in the pump housing. First, draw the air in the annular cavity into the air inlet pipe through the conduit, so that the annular cavity is in a vacuum state, thereby reducing the noise of the impeller's rotation sound;

[0022] Step 2: The piston plate is pressed downward by the flow of gas in the annular cavity, so that the vertical rod pulls the second movable block to gradually separate from the second port block. At this time, the arc-shaped porous plate follows the movement of the second movable block to block one side of the conduit, so that the air intake pipe begins to evacuate the external device, and the gas is guided to the surroundings through the second annular groove through the obstruction of the second movable block, and then the noise of the diverted gas is reduced through a plurality of second noise reduction holes, thereby having a noise reduction effect on the intake sound of the air intake pipe;

[0023] Step 3: At the same time, the vacuum of the annular cavity is at low pressure, so that the high pressure in the long groove drives the inclined hollow block and the arc plate to move toward the annular cavity, so that the air pressure in the annular cavity and the long groove is gradually balanced, and the long groove space is smaller than the annular cavity, thereby avoiding affecting the vacuum noise reduction environment of the impeller. When the inclined hollow block moves away, the conical tube falls and connects with the oil pipe, so that the lubricating oil in the oil bag enters the round box, lubricates and reduces the noise of the output shaft of the motor, and the lubricating oil is recycled through the reflux pipe;

[0024] Step 4: The second movable block is pushed by the vacuum gas to make the tooth block on the connecting plate mesh with the gear ring, so that the circular plate drives multiple oil bags to deflect. When the vacuum pump is used for a certain number of times, one of the oil bags is in a vertical state, so that the output shaft of the motor can be lubricated and oiled, thereby reducing the noise of the motor output shaft. At the same time, when the second movable block is reset by the stopper, the rotation drive of the gear ring is not affected;

[0025] Step 5: Finally, the exhaust gas in the outlet pipe drives the first movable block to move upward, so that the gas is pumped to the outside of the pump housing through the first annular groove and the plurality of first noise reduction holes, thereby reducing the noise of the outlet sound of the outlet pipe.

[0026] The beneficial effects of the present invention are as follows: the gas in the annular cavity can be extracted through the equipment to make the inside of the pump casing outside the impeller in a vacuum state, thereby having a vacuum noise reduction effect on the impeller, and the gas is guided by the second annular groove to make the gas pass through multiple second noise reduction holes to reduce the noise of the gas flow sound of the inlet pipe. Conversely, the gas flow sound of the outlet pipe is reduced through the air outlet unit, and at the same time, lubricating oil is injected into the round box through the oil bag to lubricate and reduce the noise of the output shaft of the motor. The overall structures cooperate with each other to enable the equipment to achieve multiple targeted noise reduction effects, greatly reducing the noise impact during the use of the equipment, and can have a timed and controlled amount of lubricating oil injection, thereby improving the smooth operation and service life of the equipment connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 This is a schematic diagram of the overall front structure of a noise reduction device for a vacuum pump proposed by the present invention;

[0029] Figure 2 A schematic diagram of a partial cross-sectional structure of a noise reduction device for a vacuum pump proposed by the present invention;

[0030] Figure 3 A schematic diagram of the cross-sectional structure of the air outlet pipe proposed by the present invention;

[0031] Figure 4 A schematic diagram of the cross-sectional structure of the air intake pipe proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the top view of the air intake pipe proposed by the present invention;

[0033] Figure 6 This is a schematic diagram of the connection structure between the inclined hollow block and the pump casing proposed by the present invention;

[0034] Figure 7 A schematic diagram of the internal structure of a half-section of the pump casing proposed by the present invention;

[0035] Figure 8 This is a bottom-up overall structural schematic diagram of a noise reduction device for a vacuum pump proposed by the present invention;

[0036] Fig. 9 This is a schematic diagram of the cross-sectional structure of the support plate proposed in the present invention.

[0037] In the figure: 100, main unit; 101, pump housing; 102, motor; 103, impeller; 104, air inlet pipe; 105, air outlet pipe;

[0038] 200, air outlet unit; 201, first port block; 202, first cross plate; 203, first elastic rope; 204, first movable block; 205, first annular groove; 206, first noise reduction hole;

[0039] 207, air intake assembly; 207a, second port block; 207b, second cross plate; 207c, second elastic rope; 207d, second movable block; 207e, second annular groove; 207f, second noise reduction hole;

[0040] 208, vacuum assembly; 208a, conduit; 208b, annular cavity; 208c, vertical rod; 208d, piston plate; 208e, arc-shaped porous block;

[0041] 209, oil injection assembly; 209a, round plate; 209b, oil bag; 209c, leak hole; 209d, conical tube; 209e, round box; 209f, oil pipe; 209g, return pipe;

[0042] 210, driving assembly; 210a, gear ring; 210b, movable opening; 210c, connecting plate; 210d, gear block; 210e, stop block;

[0043] 211, opening and closing assembly; 211a, arc-shaped plate; 211b, long groove; 211c, inclined hollow block;

[0044] 212. Support plate; 213. Groove; 214. Damper; 215. Shock-absorbing suction cup; 216. Spring; 217. Air intake nozzle; 218. Solenoid valve. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0049] Reference Figure 1-9 The present invention provides a noise reduction device for a vacuum pump and a method for using the same, comprising:

[0050] The main unit 100 includes a pump housing 101 and a motor 102. The output shaft of the motor 102 movably passes through the pump housing 101 and is fixedly connected to an impeller 103. The pump housing 101 is respectively fixedly connected with an air inlet pipe 104 and an air outlet pipe 105. The impeller 103 can be driven by the motor 102 to rotate in the pump housing 101, and the gas in the vacuum pump is continuously discharged to reduce the internal pressure, so that the external gas is sucked into the pump under the action of the pressure difference and then discharged, thereby realizing the vacuuming function. The basic use function of the equipment is realized through the air inlet pipe 104 and the air outlet pipe 105;

[0051] The air outlet unit 200 includes a first port block 201, which is fixedly connected to the air outlet pipe 105. A first cross plate 202 is fixedly connected to the first port block 201. A first elastic rope 203 is fixedly connected to the first cross plate 202 on one side away from the impeller 103. The other end of the first elastic rope 203 is fixedly connected to a first movable block 204. The first movable block 204 is movably arranged in the first port block 201. A first annular groove 205 is provided in the first port block 201. A plurality of first noise reduction holes 206 are provided in an annular shape on one side inner wall of the first annular groove 205. The first movable block 204 can be driven upward by the gas discharged by the vacuum pump, so that the gas is pumped to the outside of the pump housing 101 through the diversion of the first annular groove 205 and the plurality of first noise reduction holes 206, thereby reducing the noise of the air outlet sound of the air outlet pipe 105.

[0052] The air intake pipe 104 is provided with an air intake component 207 for reducing the noise of vacuum air intake, the air intake pipe 104 is provided with a vacuum component 208 for reducing the noise of the impeller 103 rotation, the pump housing 101 is provided with an oil injection component 209 for lubricating the output shaft of the motor 102, the pump housing 101 is provided with a driving component 210 for quantitative oil injection, and the pump housing 101 is provided with an opening and closing component 211 for opening and closing the oil injection channel, which can achieve the effect of reducing the noise of the gas flow in the air intake pipe 104 through the air intake component 207, and through the vacuum The air component 208 realizes the noise reduction effect on the rotation noise of the impeller 103, the lubrication and noise reduction of the output shaft of the motor 102 is realized through the oil filling component 209, and the deflection drive of the oil bag 209b is realized through the driving component 210. When the equipment is used for a certain number of times, the deflected oil bag 209b on one side is made vertical, so as to perform secondary oil filling, so that the output shaft of the motor 102 is always in a lubricated effect, and the opening and closing operation of the oil filling component 209 is realized through the opening and closing component 211, so that the lubricating oil can flow vertically.

[0053] The air intake assembly 207 includes a second port block 207a, which is fixedly connected to the air intake pipe 104, a second cross plate 207b is fixedly connected inside the second port block 207a, a second elastic rope 207c is fixedly connected to a side of the second cross plate 207b close to the impeller 103, and a second movable block 207d is fixedly connected to the other end of the second elastic rope 207c, and the second movable block 207d is movably arranged in the second port block 207a, a second annular groove 207e is provided in the second port block 207a, and a plurality of second noise reduction holes 207f are provided on the inner wall of one side of the second annular groove 207e in a ring shape, which can exert pressure on the second movable block 207d to push to one side through the air flow in the vacuum. As a result, the second elastic rope 207c is extended, and the gas is guided to the surroundings through the second annular groove 207e, so that the gas enters the device through the multiple second noise reduction holes 207, and the noise generated by the intake is reduced, thereby achieving the effect of intake noise reduction. At the same time, when the device finishes extracting the vacuum, the second elastic rope 207c is contracted to connect the second movable block 207d with the second port block 207a, so as to avoid gas backflow and improve the vacuum degree of the vacuum extraction of the external device. Through the obstruction of the second movable block 207d, the gas is guided to the surroundings through the second annular groove 207e, and then the noise of the diverted gas is reduced through the multiple second noise reduction holes 207f, thereby having a noise reduction effect on the intake sound of the intake pipe 104.

[0054] Furthermore, the vacuum assembly 208 includes a conduit 208a, which is fixedly connected to the air inlet pipe 104, an annular cavity 208b is provided in the pump housing 101, and the other end of the conduit 208a is connected to the annular cavity 208b, a second movable block 207d is fixedly connected to a vertical rod 208c on one side close to the impeller 103, a piston plate 208d is fixedly connected to the bottom end of the vertical rod 208c, and the piston plate 208d is movably arranged in the air inlet pipe 104, a second movable block 207d is fixedly connected to an arc-shaped porous block 208e on one side close to the impeller 103, and the outer surface of the arc-shaped porous block 208e is fixedly connected to the impeller 103. The surface of the ring fits with the inner wall of the air inlet pipe 104, and the device can first evacuate the annular cavity 208b through the conduit 208a, so that the annular cavity 208b is in a vacuum state, thereby having a vacuum noise reduction effect around the impeller 103, greatly reducing the noise generated by the rotation of the impeller 103, and at the same time, by extracting the vacuum gas flow, the vertical rod 208c drives the second movable block 207d to move downward, so that the arc-shaped porous block 208e blocks one end of the conduit 208a to prevent gas from filling into the annular cavity 208b, and at the same time, the external device is evacuated to allow the gas to circulate.

[0055] Furthermore, the oil injection assembly 209 includes a circular plate 209a, which is rotatably connected to the pump housing 101, and the circular plate 209a is annularly fixed with multiple oil bags 209b, the pump housing 101 is provided with a leakage hole 209c, and a conical tube 209d is movably arranged in the leakage hole 209c, and the output shaft sleeve of the motor 102 is provided with a circular box 209e, and the circular box 209e is fixedly connected to the inner wall of one side of the pump housing 101, and the circular box 209e is fixedly connected with an oil pipe 209f, and the oil pipe 209f matches the conical tube 209d, and the circular box 209e is provided with a circular box 209e. A return pipe 209g is fixedly connected, and the other end of the return pipe 209g is movable through the circular plate 209a, and can correspond to the leakage hole 209c through the oil bag 209b, so that the lubricating oil flows into the oil pipe 209f through the tapered tube 209d, and finally enters the round box 209e, thereby lubricating the output shaft of the motor 102, reducing the noise caused by the friction of the output shaft, making the operation of the output shaft of the motor 102 more stable, reducing the vibration and noise caused by the uneven operation, and at the same time, the return pipe 209g has the effect of reflux and collection of the lubricating oil.

[0056] Furthermore, the driving assembly 210 includes a gear ring 210a, which is rotatably connected to the pump housing 101, and the gear ring 210a is fixedly connected to the circular plate 209a. The air inlet pipe 104 and the second port block 207a are jointly provided with a movable port 210b, and the second movable block 207d is fixedly connected to a connecting plate 210c, and the inner walls on both sides of the connecting plate 210c are jointly hinged with gear blocks 210d, and the gear blocks 210d are meshed with the gear ring 210a. A stopper 210e is fixedly connected to the inner wall of one side of the connecting plate 210c, which can be used by vacuuming the equipment so that the connecting plate 210c moves up and down following the second movable block 207d, and It is restricted by the movable opening 210b to prevent misalignment and displacement, and the opening space of the movable opening 210b is smaller than the second movable block 207d to avoid gas escape caused by vacuum extraction. When the connecting plate 210c moves downward, the tooth block 210d is engaged with the gear ring 210a, and the tooth block 210d is blocked by the stop block 210e during the engagement process to achieve the deflection of the gear ring 210a. When the connecting plate 210c moves upward and resets, the tooth block 210d is not restricted by the stop block 210e and rotates to prevent affecting the deflection effect of the gear ring 210a, thereby achieving quantitative injection of lubricating oil and avoiding excessive or insufficient injection of lubricating oil to affect the use of the equipment.

[0057] Furthermore, the opening and closing assembly 211 includes an arc plate 211a, which is movably arranged in the annular cavity 208b. A long groove 211b is provided on the inner wall of one side of the annular cavity 208b. A hollow bevel block 211c is movably connected in the long groove 211b. The hollow bevel block 211c is fixedly connected to the arc plate 211a, and the annular cavity 208b can be placed in a low pressure state by the vacuum effect on the annular cavity 208b, while the long groove 211b is placed in a high pressure state. , so that the inclined hollow block 211c drives the arc plate 211a to move toward the side of the annular cavity 208b, so that the air pressure in the annular cavity 208b and the long groove 211b tends to be balanced, and the opening space of the long groove 211b is smaller than the annular cavity 208b, thereby avoiding affecting the vacuum noise reduction effect on the impeller 103. When the inclined hollow block 211c gradually moves away from the long groove 211b, the conical tube 209d moves downward due to the fluidity of the lubricating oil and connects with the oil pipe 209f, thereby achieving the effect of oil passage.

[0058] Furthermore, support plates 212 are fixedly connected to the pump housing 101 and the motor 102 , and the bottom surfaces of the two support plates 212 are arranged in a uniform horizontal plane, so that the support plates 212 can assist in improving the placement stability of the equipment during use.

[0059] Furthermore, grooves 213 are provided on one side of the two support plates 212 away from the pump housing 101, and dampers 214 are fixedly connected to the inner walls of one side of the two grooves 213. The telescopic ends of the two dampers 214 are fixedly connected to shock-absorbing suction cups 215. Springs 216 are sleeved on the two dampers 214, and the two ends of the spring 216 are respectively fixedly connected to the corresponding grooves 213 and shock-absorbing suction cups 215. The shock-absorbing suction cups 215 can enhance the connectivity between the equipment and the corresponding ground to prevent the equipment from overturning due to external factors during the vacuuming process. At the same time, the damper 214 and the spring 216 cooperate with each other to reduce the vibration of the equipment during operation and enhance the firmness of the equipment.

[0060] Furthermore, an air inlet nozzle 217 is fixedly connected to the pump housing 101, and an electromagnetic valve 218 is provided on the air inlet nozzle 217. The opening and closing of the air inlet nozzle 217 can be controlled by the electromagnetic valve 218. When the device finishes vacuuming, gas is re-injected into the annular cavity 208b, and the device is adjusted to a vertical shape so that the arc plate 211a is affected by gravity to drive the inclined hollow block 211c to return to the long groove 211b, and one side of it is set as an inclined surface, thereby disconnecting the connection between the conical tube 209d and the oil pipe 209f, so that the device is restored to its initial state.

[0061] A method for using a noise reduction device for a vacuum pump, the method for using a noise reduction device for a vacuum pump is applicable to any of the above noise reduction devices for a vacuum pump, and the method for using a noise reduction device for a vacuum pump comprises the following steps:

[0062] Step 1: When the vacuum pump is used for noise reduction, the air inlet pipe 104 is connected to an external vacuum device, and then the motor 102 is used to drive the impeller 103 to rotate in the pump housing 101. The air in the annular cavity 208b is first sucked into the air inlet pipe 104 through the conduit 208a, so that the annular cavity 208b is in a vacuum state, thereby reducing the noise of the rotation sound of the impeller 103;

[0063] Step 2: The piston plate 208d is pressed downward by the flow of gas in the annular cavity 208b, so that the vertical rod 208c pulls the second movable block 207d to gradually separate from the second port block 207a. At this time, the arc-shaped porous plate 208e follows the movement of the second movable block 207d to block one side of the conduit 208a, so that the air intake pipe 104 starts to evacuate the external device, and through the obstruction of the second movable block 207d, the gas is guided to the surroundings through the second annular groove 207e, and then the noise of the diverted gas is reduced through the multiple second noise reduction holes 207f, thereby having a noise reduction effect on the intake sound of the air intake pipe 104;

[0064] Step 3: At the same time, the vacuum of the annular cavity 208b is at low pressure, so that the high pressure in the long groove 211b drives the inclined hollow block 211c and the arc plate 211a to move toward the annular cavity 208b, so that the air pressure in the annular cavity 208b and the long groove 211b is gradually balanced, and the space of the long groove 211b is smaller than the annular cavity 208b, thereby avoiding affecting the vacuum noise reduction environment of the impeller 103. When the inclined hollow block 211c moves away, the conical tube 209d falls and communicates with the oil pipe 209f, so that the lubricating oil in the oil bag 209b enters the round box 209e, lubricates and reduces the noise of the output shaft of the motor 102, and the lubricating oil is recycled through the return pipe 209g;

[0065] Step 4: The second movable block 207d is pushed by the vacuum gas to make the tooth block 210d on the connecting plate 210c mesh with the gear ring 210a, so that the circular plate 209a drives the multiple oil bags 209b to deflect. When the vacuum pump is used for a certain number of times, one of the oil bags 209b is in a vertical state, so that the output shaft of the motor 102 can be lubricated and oiled, thereby reducing the noise of the output shaft of the motor 102. At the same time, when the second movable block 207d is reset by the stopper 210e, the rotation drive of the gear ring 210a is not affected;

[0066] Step 5: Finally, the exhaust gas in the outlet pipe 105 drives the first movable block 204 to move upward, so that the gas is pumped to the outside of the pump housing 101 through the first annular groove 205 and the plurality of first noise reduction holes 206, thereby reducing the noise of the outlet sound of the outlet pipe 105.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A noise reduction device for a vacuum pump, characterized in that: include: The main unit (100) comprises a pump housing (101) and a motor (102); the output shaft of the motor (102) movably passes through the pump housing (101) and is fixedly connected to an impeller (103); and an air inlet pipe (104) and an air outlet pipe (105) are respectively fixedly connected to the pump housing (101); The air outlet unit (200) comprises a first port block (201), the first port block (201) being fixedly connected to the air outlet pipe (105), a first cross plate (202) being fixedly connected to the first port block (201), a first elastic rope (203) being fixedly connected to a surface of the first cross plate (202) away from the impeller (103), the other end of the first elastic rope (203) being fixedly connected to a first movable block (204), the first movable block (204) being movably arranged in the first port block (201), a first annular groove (205) being provided in the first port block (201), and a plurality of first noise reduction holes (206) being provided in an annular shape on an inner wall of one side of the first annular groove (205); An air intake assembly (207) for reducing vacuum air intake noise is arranged in the air intake pipe (104), a vacuum assembly (208) for reducing the noise of the impeller (103) rotation noise is arranged on the air intake pipe (104), an oil injection assembly (209) for lubricating the output shaft of the motor (102) is arranged on the pump housing (101), a driving assembly (210) for quantitative oil injection is arranged on the pump housing (101), and an opening and closing assembly (211) for opening and closing the oil injection channel is arranged in the pump housing (101).

2. A noise reduction device for a vacuum pump according to claim 1, characterized in that: The air intake assembly (207) comprises a second port block (207a), the second port block (207a) is fixedly connected to the air intake pipe (104), a second cross plate (207b) is fixedly connected inside the second port block (207a), a second elastic rope (207c) is fixedly connected to a surface of the second cross plate (207b) close to the impeller (103), the other end of the second elastic rope (207c) is fixedly connected to a second movable block (207d), the second movable block (207d) is movably arranged inside the second port block (207a), a second annular groove (207e) is provided inside the second port block (207a), and a plurality of second noise reduction holes (207f) are provided in an annular shape on an inner wall of one side of the second annular groove (207e).

3. A noise reduction device for a vacuum pump according to claim 2, characterized in that: The vacuum component (208) comprises a conduit (208a), which is fixedly connected to the air inlet pipe (104); an annular cavity (208b) is provided in the pump housing (101); the other end of the conduit (208a) is connected to the annular cavity (208b); a side of the second movable block (207d) close to the impeller (103) is fixedly connected to a vertical rod (208c); a bottom end of the vertical rod (208c) is fixedly connected to a piston plate (208d); the piston plate (208d) is movably arranged in the air inlet pipe (104); a side of the second movable block (207d) close to the impeller (103) is fixedly connected to an arc-shaped porous block (208e); an outer ring surface of the arc-shaped porous block (208e) is in contact with an inner wall of the air inlet pipe (104).

4. A noise reduction device for a vacuum pump according to claim 3, characterized in that: The oil injection assembly (209) comprises a circular plate (209a), which is rotatably connected to the pump housing (101); a plurality of oil bags (209b) are fixedly connected to the circular plate (209a) in an annular shape; a leakage hole (209c) is provided on the pump housing (101); a conical tube (209d) is movably arranged in the leakage hole (209c); an output shaft sleeve of the motor (102) is provided with a circular box (209e); the circular box (209e) is fixedly connected to an inner wall of one side of the pump housing (101); an oil pipe (209f) is fixedly connected to the circular box (209e); the oil pipe (209f) and the conical tube (209d) match each other; a return pipe (209g) is fixedly connected to the circular box (209e); the other end of the return pipe (209g) movably passes through the circular plate (209a).

5. A noise reduction device for a vacuum pump according to claim 4, characterized in that: The driving assembly (210) comprises a gear ring (210a), the gear ring (210a) is rotatably connected to the pump housing (101), the gear ring (210a) is fixedly connected to the circular plate (209a), the air inlet pipe (104) and the second port block (207a) are jointly provided with a movable port (210b), the second movable block (207d) is fixedly connected to a connecting plate (210c), the inner walls on both sides of the connecting plate (210c) are jointly hinged with gear blocks (210d), the gear blocks (210d) are meshed with the gear ring (210a), and a stopper (210e) is fixedly connected to the inner wall on one side of the connecting plate (210c).

6. A noise reduction device for a vacuum pump according to claim 5, characterized in that: The opening and closing assembly (211) comprises an arc-shaped plate (211a), the arc-shaped plate (211a) is movably arranged in the annular cavity (208b), a long groove (211b) is provided on the inner wall of one side of the annular cavity (208b), an inclined hollow block (211c) is movably connected in the long groove (211b), and the inclined hollow block (211c) is fixedly connected to the arc-shaped plate (211a).

7. A noise reduction device for a vacuum pump according to claim 6, characterized in that: The pump housing (101) and the motor (102) are both fixedly connected with support plates (212), and the bottom surfaces of the two support plates (212) are arranged in a uniform horizontal plane.

8. A noise reduction device for a vacuum pump according to claim 7, characterized in that: A groove (213) is provided on one side of the two support plates (212) away from the pump housing (101); a damper (214) is fixedly connected to the inner wall of one side of the two grooves (213); a shock-absorbing suction cup (215) is fixedly connected to the telescopic ends of the two dampers (214); a spring (216) is sleeved on the two dampers (214); and two ends of the spring (216) are fixedly connected to the corresponding groove (213) and the shock-absorbing suction cup (215), respectively.

9. A noise reduction device for a vacuum pump according to claim 8, characterized in that: An air inlet nozzle (217) is fixedly connected to the pump housing (101), and an electromagnetic valve (218) is arranged on the air inlet nozzle (217).

10. A method for using a noise reduction device for a vacuum pump, the method for using a noise reduction device for a vacuum pump being applicable to any one of the noise reduction devices for a vacuum pump in claims 1 to 9 above, characterized in that: The method for using the noise reduction device for a vacuum pump comprises the following steps: Step 1: When noise reduction is performed during the use of the vacuum pump, the air inlet pipe (104) is connected to an external vacuum pumping device, and then the motor (102) is used to drive the impeller (103) to rotate in the pump housing (101). The air in the annular cavity (208b) is first sucked into the air inlet pipe (104) through the conduit (208a), so that the annular cavity (208b) is in a vacuum state, thereby reducing the noise of the rotation sound of the impeller (103); Step 2: The piston plate (208d) is pressed downward by the flow of gas in the annular cavity (208b), so that the vertical rod (208c) pulls the second movable block (207d) to gradually separate from the second port block (207a). At this time, the arc-shaped porous plate (208e) follows the movement of the second movable block (207d) to block one side of the conduit (208a), so that the air intake pipe (104) begins to evacuate the external device, and through the obstruction of the second movable block (207d), the gas is guided to the surroundings through the second annular groove (207e), and then the noise of the diverted gas is reduced through the multiple second noise reduction holes (207f), thereby having a noise reduction effect on the intake sound of the air intake pipe (104); Step 3: At the same time, the vacuum of the annular cavity (208b) is at low pressure, so that the high pressure in the long groove (211b) drives the inclined hollow block (211c) and the arc plate (211a) to move toward the annular cavity (208b), so that the air pressure in the annular cavity (208b) and the long groove (211b) is gradually balanced, and the space of the long groove (211b) is smaller than that of the annular cavity (208b), thereby avoiding affecting the vacuum noise reduction environment of the impeller (103). When the inclined hollow block (211c) moves away, the conical tube (209d) falls and communicates with the oil pipe (209f), so that the lubricating oil in the oil bag (209b) enters the round box (209e), lubricates and reduces the noise of the output shaft of the motor (102), and the lubricating oil is recycled through the return pipe (209g); Step 4: The second movable block (207d) is pushed by the vacuum gas to mesh the tooth block (210d) on the connecting plate (210c) with the tooth ring (210a), so that the circular plate (209a) drives the multiple oil bags (209b) to deflect. When the vacuum pump is used a certain number of times, one of the oil bags (209b) is in a vertical state, so that the output shaft of the motor (102) can be lubricated and oiled, thereby reducing the noise of the output shaft of the motor (102). At the same time, when the second movable block (207d) is reset by the stopper (210e), the rotation drive of the tooth ring (210a) is not affected; Step 5: Finally, the exhaust gas in the outlet pipe (105) drives the first movable block (204) to move upward, so that the gas is guided by the first annular groove (205) and pumped to the outside of the pump housing (101) through the plurality of first noise reduction holes (206), thereby reducing the noise of the outlet sound of the outlet pipe (105).

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