High-speed cantilever multistage turbine vacuum pump

Abstract

The invention belongs to the technical field of vacuum pumps, and particularly relates to a high-speed cantilever multistage turbine vacuum pump which comprises a vacuum pump body and a driving motor arranged on one side of the vacuum pump body. The device further comprises a speed-increasing transmission mechanism, a lubrication filling mechanism, an automatic compensation clamping anti-shaking mechanism, a driving power regulation and control mechanism, a shaft side clamping force regulation and control mechanism, a lubrication action active starting mechanism, an emergency high-speed starting feedback mechanism and an emergency state duration confirmation mechanism. Clamping force can be provided on the outer side of the input shaft of the vacuum pump body, the clamping force can improve the stability of the input shaft, vibration caused by unbalance, airflow excitation and other factors is restrained, the shaking amplitude of the shaft is prevented from exceeding the allowable range, and the higher the rotating speed of the input shaft is, the larger the force of the clamping force is.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum pumps, and in particular relates to a high-speed cantilever multi-stage turbine vacuum pump. Background Art

[0002] The high-speed cantilever multi-stage turbine vacuum pump draws in gas through the air intake port, which is compressed by the high-speed rotating turbine rotor and then discharged. The exhaust speed can reach thousands of revolutions per minute, with high gas discharge efficiency. The vacuum suction effect is generated by forcing the gas to flow. The special structure of the turbine enables it to discharge more gas and improve the vacuum degree in the pump body. At the same time, advanced sealing technology reduces gas leakage and further improves the vacuum degree. It adopts a cantilever structure, with the impeller installed at one end of the shaft and the other end of the shaft supported by a bearing. This structure facilitates the installation, disassembly and maintenance of the impeller. The multi-stage impellers are connected in series, and the gas is gradually compressed through each stage of the impeller in turn to achieve a higher vacuum degree and exhaust efficiency.

[0003] Because the impeller of the turbine vacuum pump needs to rotate at high speed to achieve high pumping rate and high vacuum degree, and the speed of general industrial motors is relatively low. For example, the speed of common three-phase asynchronous motors is generally about 2950r / min or 1470r / min, while the operating speed of the turbine vacuum pump impeller is usually between 7000r / min and 30000r / min. Therefore, it is often necessary to increase the speed of the motor to the required operating speed of the impeller through a speed-increasing gear assembly, so that the vacuum pump can achieve good performance, such as a high-speed cantilever multi-stage turbine vacuum pump proposed in the patent announcement number CN102678582A.

[0004] However, the input shaft of the vacuum pump rotates at high speed. When running at high speed, even a small imbalance will cause large vibration, which will cause the input shaft of the vacuum pump to shake. The shaking will increase the friction between the shaft and bearings, seals and other components, accelerate the wear of these components, shorten their service life, increase maintenance costs and downtime, and long-term shaking will cause the input shaft of the vacuum pump to be subjected to alternating stress, easily cause fatigue cracks, reduce the strength and service life of the shaft, and in severe cases may even cause the shaft to break, causing equipment failure and production accidents. Summary of the invention

[0005] The object of the present invention is to provide a high-speed cantilever multi-stage turbine vacuum pump in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a high-speed cantilever multi-stage turbine vacuum pump, comprising a vacuum pump body and a drive motor installed on one side of the vacuum pump body, wherein an input shaft is installed at the input end of the vacuum pump body, and further comprising: A speed increasing transmission mechanism, arranged between the drive motor and the input shaft, for amplifying the output speed of the drive motor and transmitting it to the input shaft; A lubrication filling mechanism is installed on the speed increasing transmission mechanism; An automatic compensating clamping and anti-swaying mechanism is installed in the vacuum pump body and sleeved on the outside of the input shaft; A driving power regulating mechanism is arranged in the vacuum pump body and is electrically connected to the driving motor; The shaft side clamping force magnitude regulating mechanism is installed in the driving power regulating mechanism, is transmission-connected to the driving power regulating mechanism, and is electrically connected to the automatic compensation clamping anti-swaying mechanism; A lubrication action active starting mechanism is arranged on the lower inner side of the driving power regulating mechanism; An emergency high-speed start feedback mechanism is arranged inside the driving power regulating mechanism; The emergency state duration confirmation mechanism is fixedly mounted on the outer wall of the driving power regulating mechanism and is electrically connected to the emergency high-speed starting feedback mechanism.

[0007] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the speed increasing transmission mechanism includes a transmission housing, the output end of the driving motor is rotatably connected in the transmission housing, and the input shaft is also rotatably connected in the transmission housing. The output end of the driving motor is located in the transmission housing and is fixedly sleeved with a driving gear, and the input shaft is located in the shaft wall of the transmission housing and is fixedly sleeved with a driven gear. The driving gear and the driven gear are meshed, the driving gear is a large diameter gear, and the driven gear is a small diameter gear.

[0008] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the lubrication filling mechanism includes a lubrication cavity opened on the transmission housing corresponding to the output end of the drive motor and the outside of the input shaft, and the side wall of the lubrication cavity located at the input shaft is fixedly connected with a first lubrication pipe, and the first lubrication pipe is fixedly connected with a second lubrication pipe, the second lubrication pipe is connected with the lubrication cavity located at the output end of the drive motor, and the diameter of the first lubrication pipe is larger than the diameter of the second lubrication pipe, and a lubrication pump is also installed on the first lubrication pipe, and the lubrication pump is fixedly installed on the outer wall of the vacuum pump body.

[0009] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the automatic compensation clamping anti-shake mechanism includes a support column fixedly installed on the inner wall of the vacuum pump main body. The upper end of the support column is fixedly installed with a fixed cylinder sleeved outside the input shaft. A plurality of extrusion rollers distributed in a ring shape are evenly installed inside the fixed cylinder. Two guide rods are symmetrically and fixedly connected to the rear side of the extrusion roller. The end of the guide rod away from the extrusion roller penetrates the outer wall of the fixed cylinder and is fixedly connected with an anti-disengagement plate. Two holding springs sleeved outside the guide rod are fixedly connected between the fixed cylinder and the extrusion roller. A force-receiving permanent magnet plate is fixedly installed on the rear side of the extrusion roller, and a force-applying electromagnetic plate opposite to the force-receiving permanent magnet plate is fixedly installed on the inner wall of the fixed cylinder.

[0010] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the driving power regulation mechanism includes a regulation shell. A potentiometer is embedded at the upper end of the regulation shell. The potentiometer is connected in series in the power supply circuit of the driving motor. A reduction gearbox is also fixedly installed on the upper side of the inner wall of the regulation shell. The upper output end of the reduction gearbox is fixedly connected to the lower rotating end of the potentiometer. A transmission gear is also fixedly installed at the lower input end of the reduction gearbox. An adjustment screw rod is rotatably connected to the upper side of the inner wall of the regulation shell. An adjustment motor for driving the adjustment screw rod to rotate self is fixedly installed on the outer wall of the regulation shell. An adjustment plate is threadedly sleeved on the rod wall of the adjustment screw rod. A transmission rack meshing with the transmission gear is fixedly connected to the upper side wall of the adjustment plate.

[0011] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the shaft-side clamping force magnitude regulation mechanism includes a regulation resistance rod fixedly installed on the inner wall of the regulation shell. A sleeve hole sleeved outside the regulation resistance rod is formed on the side wall of the adjustment plate, and a regulation conductive contact piece in electrical contact with the regulation resistance rod is fixedly installed on the inner wall corresponding to the sleeve hole. The regulation conductive contact piece and the regulation resistance rod are connected in series in the power supply circuit of the force-applying electromagnetic plate.

[0012] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the lubrication action active start mechanism includes a reciprocating screw rod rotatably connected to the lower side of the inner wall of the regulation shell. An adjustment motor for driving the reciprocating screw rod to rotate self is fixedly installed on the outer wall of the regulation shell. An pressing plate is threadedly sleeved on the rod wall of the reciprocating screw rod. A start switch opposite to the pressing plate is fixedly installed on the lower side wall of the adjustment plate.

[0013] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the emergency high-speed start feedback mechanism includes a plurality of limiting slide rods movably inserted into the side wall of the regulation shell. One end of the plurality of limiting slide rods located inside the regulation shell is fixedly connected to the same feedback switch. A plurality of compensation springs sleeved outside the limiting slide rods are fixedly connected between the feedback switch and the opposite side of the regulation shell. The feedback switch is arranged opposite to the adjustment plate.

[0014] In the above-mentioned high-speed cantilever multi-stage turbine vacuum pump, the emergency state duration confirmation mechanism includes an installation circular shell. A rotating shaft is rotatably connected to the center of the inner wall of the installation circular shell. A rotating motor for driving the rotating shaft to rotate is fixedly installed on the outer wall of the installation circular shell. A confirmation switch is fixedly installed on one side of the inner wall of the installation circular shell. An arc-shaped trigger block corresponding to the position of the confirmation switch is fixedly connected to the shaft wall of the rotating shaft.

[0015] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By providing the vacuum pump main body, the speed increasing transmission mechanism, the driving motor, the input shaft, and the driving power regulation mechanism, the working power of the vacuum pump can be quickly adjusted based on actual needs, and the requirements for the driving equipment of the vacuum pump are lower. Through the speed increasing component, a low-speed motor can also meet the use requirements of the vacuum pump, with a wider applicability.

[0016] 2. By providing the lubrication filling mechanism, the driving power regulation mechanism, and the lubrication action active start mechanism, automatic lubrication operations can be performed on the rotating connection parts of the input end of the driving motor of the speed increasing transmission mechanism and the input shaft of the vacuum pump main body, ensuring transmission stability. Moreover, the rotation speeds of the output end of the driving motor and the input shaft of the vacuum pump main body can be confirmed according to the working power of the entire vacuum pump. The faster the rotation speed, the higher the lubricating oil filling frequency, ensuring the timeliness of lubricating oil filling and the stability of the entire vacuum pump during use.

[0017] 3. By providing the automatic compensation clamping anti-vibration mechanism, the driving power regulation mechanism, and the shaft side clamping force magnitude regulation mechanism, a clamping force can be provided outside the input shaft of the vacuum pump main body. The clamping force can increase the stability of the input shaft, suppress vibrations caused by factors such as imbalance and airflow excitation, prevent the swaying amplitude of the shaft from exceeding the allowable range, and the higher the rotation speed of the input shaft, the greater the magnitude of the clamping force. Because the higher the rotation speed of the input shaft, the greater the swaying degree of the input shaft and the greater the centrifugal force generated. By applying a reverse restraint force to the input shaft, the centrifugal force can be effectively balanced, reducing the swaying of the shaft and ensuring the stability of the entire vacuum pump during use.

[0018] 4. By setting up an emergency high-speed start feedback mechanism and an emergency state duration confirmation mechanism, when an accidental leak or other failures occur in the vacuum system, resulting in a decrease in vacuum degree and the need to quickly restore the vacuum state and then increase the working power of the vacuum pump to reach the threshold, the single emergency working state and duration of the vacuum pump can be confirmed. Once the duration of a single emergency state reaches the preset threshold, the system should give a timely feedback reminder so that the staff can carry out corresponding maintenance work in a timely manner. This is because when the duration of a single emergency state exceeds a certain limit, even if there is no obvious failure in the equipment at that time, it is very likely that potential damage has been caused to key components. For example, fatigue microcracks may occur in the input shaft material, and the tooth surface wear of the speed increasing gear assembly may exceed the normal range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the present invention; Figure 2 is a front cross-sectional structure schematic diagram of the present invention; Figure 3 is a cross-sectional structure schematic diagram of the lubrication filling mechanism of the present invention; Figure 4 is a cross-sectional structure schematic diagram of the automatic compensation clamping and anti-shake mechanism of the present invention; Figure 5 is a three-dimensional side cross-sectional structure schematic diagram of the driving power regulation mechanism of the present invention; Figure 6 is a side cross-sectional structure schematic diagram of the driving power regulation mechanism of the present invention; Figure 7 is a three-dimensional structure schematic diagram of the emergency high-speed start feedback mechanism of the present invention; Figure 8 is a three-dimensional cross-sectional structure schematic diagram of the emergency state duration confirmation mechanism of the present invention.

[0020] In the figure: 1 vacuum pump main body, 2 speed increasing transmission mechanism, 21 transmission housing, 22 driving gear, 23 driven gear, 3 lubrication filling mechanism, 31 lubrication cavity, 32 first lubrication pipe, 33 second lubrication pipe, 34 lubrication pump, 4 automatic compensation clamping and anti-shake mechanism, 41 support column, 42 fixed cylinder, 43 extrusion roller, 44 guide rod, 45 anti-disengagement plate, 46 retaining spring, 47 force-receiving permanent magnet plate, 48 force-applying electromagnetic plate, 5 driving power regulation mechanism, 51 regulation housing, 52 potentiometer, 53 reduction gearbox, 54 transmission gear, 55 adjusting screw, 56 adjusting motor, 57 adjusting plate, 58 transmission rack, 6 side clamping force magnitude regulation mechanism, 61 regulation resistance rod, 62 regulation conductive contact piece, 7 lubrication action active start mechanism, 71 reciprocating lead screw, 72 forward and reverse motor, 73 pressing plate, 74 start switch, 8 emergency high-speed start feedback mechanism, 81 limit slide bar, 82 feedback switch, 83 compensation spring, 9 emergency state duration confirmation mechanism, 91 mounting circular housing, 92 rotating shaft, 93 rotating motor, 94 confirmation switch, 95 arc-shaped trigger block, 10 driving motor, 11 input shaft. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] As Figure 1-Figure 8 shown, a high-speed cantilever multi-stage turbine vacuum pump includes a vacuum pump main body 1 and a driving motor 10 installed on one side of the vacuum pump main body 1. An input shaft 11 is installed at the input end of the vacuum pump main body 1. It further includes: A speed increasing transmission mechanism 2, installed between the driving motor 10 and the input shaft 11, for magnifying and transmitting the output speed of the driving motor 10 to the input shaft 11. The speed increasing transmission mechanism 2 includes a transmission housing 21. The output end of the driving motor 10 is rotatably connected inside the transmission housing 21, and the input shaft 11 is also rotatably connected inside the transmission housing 21. A driving gear 22 is fixedly sleeved on the output end of the driving motor 10 inside the transmission housing 21, and a driven gear 23 is fixedly sleeved on the shaft wall of the input shaft 11 inside the transmission housing 21. The driving gear 22 and the driven gear 23 are meshed. The driving gear 22 is a large-diameter gear, and the driven gear 23 is a small-diameter gear.

[0023] The lubricating and filling mechanism 3 is installed on the speed increasing transmission mechanism 2. The lubricating and filling mechanism 3 includes a lubricating cavity 31 formed in the transmission housing 21 corresponding to the output end of the driving motor 10 and outside the input shaft 11. A first lubricating pipe 32 is fixedly communicated with the side wall of the lubricating cavity 31 at the input shaft 11. A second lubricating pipe 33 is fixedly communicated with the first lubricating pipe 32. The second lubricating pipe 33 is communicated with the lubricating cavity 31 at the output end of the driving motor 10. And the diameter of the first lubricating pipe 32 is larger than that of the second lubricating pipe 33. A lubricating pump 34 is also installed on the first lubricating pipe 32. The lubricating pump 34 is fixedly installed on the outer wall of the vacuum pump main body 1.

[0024] The automatic compensation clamping and anti-shaking mechanism 4 is installed in the vacuum pump main body 1 and sleeved outside the input shaft 11. The automatic compensation clamping and anti-shaking mechanism 4 includes a support column 41 fixedly installed on the inner wall of the vacuum pump main body 1. A fixed cylinder 42 sleeved outside the input shaft 11 is fixedly installed at the upper end of the support column 41. A plurality of extrusion rollers 43 distributed in a ring shape are evenly installed on the inner side of the fixed cylinder 42. Two guide rods 44 are symmetrically and fixedly connected to the rear side of the extrusion roller 43. One end of the guide rod 44 away from the extrusion roller 43 penetrates through the outer wall of the fixed cylinder 42 and is fixedly connected with an anti-disengagement plate 45. Two holding springs 46 sleeved outside the guide rod 44 are fixedly connected between the fixed cylinder 42 and the extrusion roller 43. A force-receiving permanent magnet plate 47 is fixedly installed on the rear side of the extrusion roller 43. A force-applying electromagnetic plate 48 opposite to the force-receiving permanent magnet plate 47 is fixedly installed on the inner wall of the fixed cylinder 42.

[0025] The driving power regulating mechanism 5 is installed in the vacuum pump main body 1 and electrically connected to the driving motor 10. The driving power regulating mechanism 5 includes a regulating housing 51. A potentiometer 52 is embedded at the upper end of the regulating housing 51. The potentiometer 52 is connected in series in the power supply circuit of the driving motor 10. A reduction gearbox 53 is also fixedly installed on the upper side inner wall of the regulating housing 51. The upper output end of the reduction gearbox 53 is fixedly connected to the lower rotating end of the potentiometer 52. A transmission gear 54 is also fixedly installed at the lower input end of the reduction gearbox 53. An adjusting screw 55 is rotatably connected to the upper side inner wall of the regulating housing 51. An adjusting motor 56 for driving the adjusting screw 55 to rotate is fixedly installed on the outer wall of the regulating housing 51. An adjusting plate 57 is threadedly sleeved on the rod wall of the adjusting screw 55. A transmission rack 58 meshing with the transmission gear 54 is fixedly connected to the upper side wall of the adjusting plate 57.

[0026] The axial clamping force size regulating mechanism 6 is installed in the driving power regulating mechanism 5, and is transmission-connected to the driving power regulating mechanism 5, and is electrically connected to the automatic compensation clamping and anti-sway mechanism 4. The axial clamping force size regulating mechanism 6 includes a regulating resistor rod 61 fixedly installed on the inner wall of the regulating shell 51, and a sleeve hole is opened on the side wall of the adjustment plate 57 and is sleeved on the outside of the regulating resistor rod 61, and a regulating conductive contact 62 electrically contacting the regulating resistor rod 61 is fixedly installed on the inner wall of the corresponding sleeve hole, and the regulating conductive contact 62 and the regulating resistor rod 61 are connected in series to the power supply circuit of the force electromagnetic plate 48.

[0027] The lubrication action active starting mechanism 7 is installed on the lower side of the inner part of the driving power regulating mechanism 5. The lubrication action active starting mechanism 7 includes a reciprocating screw 71 rotatably connected to the lower side of the inner wall of the regulating shell 51. A forward and reverse motor 72 for driving the reciprocating screw 71 to rotate is fixedly installed on the outer wall of the regulating shell 51. A pressing plate 73 is threadedly sleeved on the rod wall of the reciprocating screw 71. A starting switch 74 arranged opposite to the pressing plate 73 is fixedly installed on the lower end side wall of the adjusting plate 57.

[0028] The emergency high-speed start-up feedback mechanism 8 is installed inside the driving power control mechanism 5. The emergency high-speed start-up feedback mechanism 8 includes multiple limit slide bars 81 that are movably inserted into the side wall of the control shell 51. One end of the multiple limit slide bars 81 located in the control shell 51 is fixedly connected to the same feedback switch 82. The feedback switch 82 and the control shell 51 are fixedly connected on the opposite side with multiple compensation springs 83 that are sleeved outside the limit slide bar 81. The feedback switch 82 is arranged opposite to the adjustment plate 57.

[0029] The emergency state duration confirmation mechanism 9 is fixedly mounted on the outer wall of the driving power control mechanism 5 and is electrically connected to the emergency high-speed starting feedback mechanism 8. The emergency state duration confirmation mechanism 9 includes a mounting circular shell 91, a rotating shaft 92 is rotatably connected at the center of the inner wall of the mounting circular shell 91, a rotating motor 93 for driving the rotating shaft 92 to rotate is fixedly mounted on the outer wall of the mounting circular shell 91, a confirmation switch 94 is fixedly mounted on one side of the inner wall of the mounting circular shell 91, and an arc-shaped trigger block 95 corresponding to the position of the confirmation switch 94 is fixedly connected to the shaft wall of the rotating shaft 92.

[0030] The operating principle of the present invention is described as follows: the output end of the driving motor 10 drives the driving gear 22 to rotate, and the input shaft 11 of the vacuum pump body 1 is driven to rotate through the meshing action of the driving gear 22 and the driven gear 23, thereby making the high-speed cantilever multi-stage turbine vacuum pump work, and because the driving gear 22 is a large-diameter gear and the driven gear 23 is a small-diameter gear, the speed output by the driving motor 10 can be amplified to the input shaft 11, thereby meeting the high-speed rotation requirement of the vacuum pump; According to actual use requirements, the action of the regulating motor 56 is controlled, and the regulating motor 56 drives the regulating screw 55 to rotate. The adjusting plate 57 drives the transmission rack 58 to move through the threaded sleeve effect of the regulating screw 55 and the regulating plate 57, and then the input end of the reduction gear box 53 is driven to rotate through the meshing action of the transmission rack 58 and the transmission gear 54, and then the rotating end of the potentiometer 52 is driven to rotate through the speed reduction of the reduction gear box 53, so that the access resistance of the potentiometer 52 is gradually reduced, and the potentiometer 52 is connected in series to the power supply circuit of the driving motor 10, so that the power supply current of the driving motor 10 is increased. The driving motor 10 is a DC motor, and when the power supply current is increased, the working power of the driving motor 10 is increased, so that the speed of the vacuum pump body 1 is increased, and the working power of the vacuum pump body 1 can be adjusted according to the use requirements; When the regulating plate 57 moves, it drives the regulating conductive contact 62 to slide on the regulating resistor rod 61, so that the access resistance of the regulating resistor rod 61 gradually becomes lower. Specifically, when the vacuum pump needs to work at a higher power, it is necessary to make the moving distance of the regulating plate 57 larger so that the driving motor 10 can meet the use requirements. At this time, the regulating conductive contact 62 will slide a larger distance on the regulating resistor rod 61, so that the access resistance of the regulating resistor rod 61 is relatively lower, and the regulating conductive contact 62 and the regulating resistor rod 61 are connected in series. In the power supply circuit of the force electromagnetic plate 48, the force electromagnetic plate 48 is energized to generate the same or greater magnetism as the force-bearing permanent magnet plate 47, thereby making the squeezing roller 43 have a greater clamping force on the outside of the input shaft 11, making the input shaft 11 more stable, because the higher the speed of the input shaft 11, the greater the centrifugal force generated by the rotating parts thereon, and the centrifugal force will cause the shaft to have a tendency to expand outward and shake. By providing a circumferential squeezing clamping force to the input shaft 11, a reverse restraining force can be applied to the input shaft 11 to balance the centrifugal force and reduce the shaking of the shaft. After the vacuum pump body 1 is put into operation, the forward and reverse motors 72 are synchronously controlled to work, and the forward and reverse motors 72 drive the reciprocating screw 71 to rotate. The threaded sleeve connection between the reciprocating screw 71 and the pressing plate 73 allows the pressing plate 73 to move in the control shell 51 until the pressing plate 73 presses on the start switch 74, indicating that the lubricating oil filling work needs to be started. At this time, the lubrication pump 34 is controlled to work, and the lubrication pump 34 cooperates with the first lubrication pipe 32 to draw the externally stored lubricating oil and transport it to the lubrication chamber 31 to automatically fill the lubricating oil. The diameter of the first lubrication pipe 32 is larger than that of the second lubrication pipe 33. According to the fluid mechanics, Poiseuille's law states that, under the same conditions, the flow rate of a fluid in a circular tube is proportional to the fourth power of the tube diameter, which means that a slight increase in the tube diameter will lead to a significant increase in the flow rate. Therefore, for a viscous fluid such as lubricating oil, when conditions such as pressure difference remain unchanged, a branch pipe with a thicker diameter can allow more lubricating oil to pass through, thereby enabling the first lubricating pipe 32 to transport more lubricating oil into the input shaft 11 of the vacuum pump body 1 for lubrication. Because after the speed change, the rotation speed of the input shaft 11 of the vacuum pump body 1 is greater than the rotation speed of the output end of the drive motor 10, and more lubricating oil needs to be added to ensure the use demand; When the vacuum pump body 1 needs to work at a higher power, the relative movement distance of the adjustment plate 57 is larger, so that the adjustment plate 57 drives the start switch 74 to move a larger distance, so that the start switch 74 is spaced from the pressing plate 73 by a smaller distance, so that the pressing plate 73 presses on the start switch 74 in a shorter time to control the operation of the lubricating filling mechanism 3, thereby automatically increasing the filling frequency of the lubricating oil, and every time the start switch 74 is pressed and triggered, the forward and reverse motor 72 drives the work in the reverse direction, thereby driving the pressing plate 73 to reset and move, until the next time the pressing plate 73 presses on the start switch 74; When an unexpected leak or other fault occurs in the vacuum system, causing the vacuum degree to drop, the vacuum state needs to be restored as soon as possible. At this time, the high-speed cantilever multi-stage turbine vacuum pump can quickly compensate for the leaked gas by running at high power for a short time, so that the system vacuum degree can be quickly restored to a normal level to avoid serious impact on the production process. Then, at this time, the moving distance of the adjustment plate 57 reaches the threshold, so that the adjustment plate 57 will press on the feedback switch 82, indicating that the entire vacuum pump will work at a high power in an emergency state. At this time, the feedback switch 82 controls the rotation motor 93 to move, and the rotation motor 93 drives the arc trigger block 95 to move in the mounting circular shell 91 until the arc trigger block 95 presses on the confirmation switch 94, indicating that the working time of the vacuum pump in the emergency state reaches the threshold, and the regulating conductive contact 62 and the regulating resistor rod 61 are connected in series to the power supply circuit of the rotating motor 93, and the rotating motor 93 is a DC motor. When the vacuum pump works at a higher power in an emergency state When the resistance value of the resistor rod 61 is adjusted to be smaller, the power supply current of the rotating motor 93 is larger, the speed of the rotating motor 93 is increased, and the interval time of the arc trigger block 95 pressing on the confirmation switch 94 is further shortened. Because in the emergency working state with higher power, the vacuum pump can withstand a shorter time. At this time, the vacuum pump sends a wireless signal to the receiving terminal of the staff to remind the staff and make corresponding maintenance processing. Because when the duration of a single emergency state exceeds a certain threshold, even if the equipment does not have an obvious fault at the time, it may have caused potential damage to key components. For example, fatigue microcracks may occur in the material of the input shaft 11, or the tooth surface wear of the speed increase gear assembly may exceed the normal range. By setting a single use time threshold, once the threshold is reached, timely measures need to be taken, such as stopping the equipment for inspection, or at least reducing the operating load of the equipment to avoid further damage.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed cantilever multi-stage turbine vacuum pump, comprising a vacuum pump body (1) and a drive motor (10) mounted on one side of the vacuum pump body (1), wherein an input shaft (11) is mounted at an input end of the vacuum pump body (1), characterized in that: Also includes: A speed increasing transmission mechanism (2) is arranged between the drive motor (10) and the input shaft (11) and is used to amplify the output speed of the drive motor (10) and transmit it to the input shaft (11); A lubrication filling mechanism (3) is mounted on the speed increasing transmission mechanism (2); An automatic compensating clamping and anti-swaying mechanism (4) is installed in the vacuum pump body (1) and sleeved on the outside of the input shaft (11); A driving power regulating mechanism (5) is arranged in the vacuum pump body (1) and is electrically connected to the driving motor (10); A shaft-side clamping force magnitude regulating mechanism (6) is disposed in the driving power regulating mechanism (5), is transmission-connected to the driving power regulating mechanism (5), and is electrically connected to the automatic compensating clamping anti-sway mechanism (4); A lubrication action active starting mechanism (7) is arranged on the lower inner side of the driving power regulating mechanism (5); An emergency high-speed start feedback mechanism (8) is arranged inside the driving power regulating mechanism (5); The emergency state duration confirmation mechanism (9) is fixedly mounted on the outer wall of the driving power regulating mechanism (5) and is electrically connected to the emergency high-speed start feedback mechanism (8).

2. A high-speed cantilever multi-stage turbine vacuum pump according to claim 1, characterized in that: The speed increasing transmission mechanism (2) comprises a transmission housing (21), the output end of the driving motor (10) is rotatably connected in the transmission housing (21), the input shaft (11) is also rotatably connected in the transmission housing (21), the output end of the driving motor (10) is located in the transmission housing (21) and is fixedly sleeved with a driving gear (22), the input shaft (11) is located in the transmission housing (21) and is fixedly sleeved with a driven gear (23), the driving gear (22) and the driven gear (23) are meshed, the driving gear (22) is a large diameter gear, and the driven gear (23) is a small diameter gear.

3. A high-speed cantilever multi-stage turbine vacuum pump according to claim 2, characterized in that: The lubrication filling mechanism (3) comprises a lubrication cavity (31) provided on the transmission housing (21) corresponding to the output end of the drive motor (10) and the outside of the input shaft (11); a first lubrication pipe (32) is fixedly connected to the side wall of the lubrication cavity (31) located at the input shaft (11); a second lubrication pipe (33) is fixedly connected to the first lubrication pipe (32); the second lubrication pipe (33) is connected to the lubrication cavity (31) located at the output end of the drive motor (10); the diameter of the first lubrication pipe (32) is larger than the diameter of the second lubrication pipe (33); a lubrication pump (34) is also installed on the first lubrication pipe (32); the lubrication pump (34) is fixedly installed on the outer wall of the vacuum pump body (1).

4. A high-speed cantilever multi-stage turbine vacuum pump according to claim 1, characterized in that: The automatic compensation clamping anti-sway mechanism (4) comprises a support column (41) fixedly mounted on the inner wall of the vacuum pump body (1); a fixed cylinder (42) sleeved outside the input shaft (11) is fixedly mounted on the upper end of the support column (41); a plurality of squeezing rollers (43) evenly mounted in an annular distribution on the inner side of the fixed cylinder (42); two guide rods (44) are symmetrically fixedly connected to the rear side of the squeezing roller (43); one end of the guide rod (44) away from the squeezing roller (43) passes through the outer wall of the fixed cylinder (42) and is fixedly connected to an anti-slip plate (45); two retaining springs (46) sleeved outside the guide rods (44) are fixedly connected between the fixed cylinder (42) and the squeezing roller (43); a force-bearing permanent magnetic plate (47) is fixedly mounted on the rear side of the squeezing roller (43); and a force-applying electromagnetic plate (48) arranged opposite to the force-bearing permanent magnetic plate (47) is fixedly mounted on the inner wall of the fixed cylinder (42).

5. A high-speed cantilever multi-stage turbine vacuum pump according to claim 4, characterized in that: The driving power regulating mechanism (5) comprises a regulating shell (51), a potentiometer (52) being embedded at the upper end of the regulating shell (51), the potentiometer (52) being connected in series to the power supply circuit of the driving motor (10), a reduction gear box (53) being fixedly mounted on the upper side of the inner wall of the regulating shell (51), an upper output end of the reduction gear box (53) being fixedly connected to a lower rotating end of the potentiometer (52), a transmission gear (54) being fixedly mounted on the lower input end of the reduction gear box (53), an adjusting screw (55) being rotatably connected to the upper side of the inner wall of the regulating shell (51), an adjusting motor (56) for driving the adjusting screw (55) to rotate being fixedly mounted on the outer wall of the regulating shell (51), an adjusting plate (57) being threadedly sleeved on the rod wall of the adjusting screw (55), and a transmission rack (58) meshing with the transmission gear (54) being fixedly connected to the upper side wall of the adjusting plate (57).

6. A high-speed cantilever multi-stage turbine vacuum pump according to claim 5, characterized in that: The axial clamping force size regulating mechanism (6) comprises a regulating resistor rod (61) fixedly mounted on the inner wall of the regulating shell (51); a sleeve hole sleeved on the outside of the regulating resistor rod (61) is formed on the side wall of the regulating plate (57); and a regulating conductive contact piece (62) electrically contacting the regulating resistor rod (61) is fixedly mounted on the inner wall of the corresponding sleeve hole; the regulating conductive contact piece (62) and the regulating resistor rod (61) are connected in series to the power supply circuit of the force electromagnetic plate (48).

7. A high-speed cantilever multi-stage turbine vacuum pump according to claim 5, characterized in that: The lubrication action active starting mechanism (7) comprises a reciprocating screw (71) rotatably connected to the lower side of the inner wall of the regulating housing (51); a forward and reverse motor (72) for driving the reciprocating screw (71) to rotate is fixedly mounted on the outer wall of the regulating housing (51); a pressing plate (73) is threadedly sleeved on the rod wall of the reciprocating screw (71); and a starting switch (74) arranged opposite to the pressing plate (73) is fixedly mounted on the lower side wall of the regulating plate (57).

8. A high-speed cantilever multi-stage turbine vacuum pump according to claim 5, characterized in that: The emergency high-speed start feedback mechanism (8) comprises a plurality of limit slide bars (81) movably inserted into the side wall of the regulating shell (51); one end of the plurality of limit slide bars (81) located inside the regulating shell (51) is fixedly connected to a same feedback switch (82); a plurality of compensation springs (83) sleeved outside the limit slide bars (81) are fixedly connected to the opposite side of the feedback switch (82) and the regulating shell (51); and the feedback switch (82) is arranged opposite to the regulating plate (57).

9. A high-speed cantilever multi-stage turbine vacuum pump according to claim 1, characterized in that: The emergency state duration confirmation mechanism (9) comprises a mounting round shell (91), a rotating shaft (92) is rotatably connected at the center of the inner wall of the mounting round shell (91), a rotating motor (93) for driving the rotating shaft (92) to rotate is fixedly mounted on the outer wall of the mounting round shell (91), a confirmation switch (94) is fixedly mounted on one side of the inner wall of the mounting round shell (91), and an arc-shaped trigger block (95) arranged corresponding to the position of the confirmation switch (94) is fixedly connected to the shaft wall of the rotating shaft (92).

Images