Vacuum pump rotating speed self-adaptive adjusting device

Abstract

The invention discloses a vacuum pump rotating speed self-adaption adjusting device, and relates to the technical field of vacuum pumps, the vacuum pump rotating speed self-adaption adjusting device comprises a water ring vacuum pump, a centrifugal assembly and a control assembly, the two ends of the water ring vacuum pump are provided with an air inlet and an air outlet, and the centrifugal assembly comprises a sliding sleeve fixedly connected with a shaft of the water ring vacuum pump; a sliding block is connected in the sliding sleeve in a sliding mode, a spring is arranged between the sliding sleeve and the sliding block, and one end of an adjusting line is fixedly connected to the sliding block; according to the device, through cooperative work of the centrifugal assembly and the control assembly, the device can automatically adjust the rotating speed of the water ring vacuum pump according to the real-time change of the pressure of a vacuum system, manual intervention is not needed, accurate and efficient pressure control is achieved, it is ensured that the system pressure is stabilized within a set range, and the reliability and stability of system operation are improved; and the device is not easily influenced by the environment, is simple in structure, low in cost, low in later maintenance difficulty and low in maintenance cost, and can be widely applied to small and medium-sized enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pumps, and particularly to a device for adaptively adjusting the rotational speed of a vacuum pump. Background Art

[0002] With its advantages such as simple structure and reliable operation, the water-ring vacuum pump undertakes key tasks such as vacuum pumping and gas transportation in many industrial fields such as chemical industry, pharmaceuticals, and food processing.

[0003] During the actual operation process, the pressure of the vacuum system will change dynamically due to factors such as process changes and gas load fluctuations. The rotational speed of the water-ring vacuum pump directly affects its pumping efficiency and the maintenance of vacuum degree. Therefore, it is crucial to accurately and timely adjust the rotational speed of the vacuum pump.

[0004] Currently, the traditional methods for adjusting the rotational speed of water-ring vacuum pumps mainly include manual adjustment and partial automation adjustment.

[0005] The manual adjustment method relies on operators to manually adjust parameters such as the opening degree of the intake valve and power supply according to experience and simple monitoring tools such as pressure gauges to change the rotational speed of the pump.

[0006] However, this adjustment method has obvious defects. Due to the limited reaction speed of manual operation, it is unable to respond to the instantaneous changes in system pressure in real time and quickly, easily leading to large fluctuations in the pressure of the vacuum system and being difficult to stabilize within the set range required by the process. This not only reduces production efficiency but also may affect product quality and the service life of equipment.

[0007] Some water-ring vacuum pump systems with automated adjustment usually form a closed-loop control system with the help of pressure sensors, controllers, and actuators.

[0008] Although this system can achieve a certain degree of automatic adjustment, the pressure sensor is easily interfered by factors such as environmental temperature, humidity, and corrosive gases, resulting in inaccurate measurement data; signal transmission and coordinated actions between the controller and the actuator may also have delays or deviations, making the rotational speed adjustment inaccurate.

[0009] In addition, such automated systems have complex structures, high costs, and high later maintenance difficulties and maintenance costs, restricting their wide application in small and medium-sized enterprises and cost-sensitive fields.

[0010] In view of this, the present application is specifically proposed. Summary of the Invention

[0011] The purpose of the present invention is to provide a device for adaptively adjusting the rotational speed of a vacuum pump to solve the problems raised in the above background art.

[0012] To solve the above technical problems, a device for adaptively adjusting the rotational speed of a vacuum pump provided by the present invention includes a water-ring vacuum pump. An air inlet and an air outlet are provided at both ends of the water-ring vacuum pump. The device further includes a centrifugal component and a control component. The centrifugal component includes a sliding sleeve fixedly connected to the shaft of the water-ring vacuum pump. A slider is slidably connected in the sliding sleeve. A spring is provided between the sliding sleeve and the slider. One end of an adjustment wire is fixedly connected to the slider. The control component includes a rotating rod rotatably connected to the air inlet. A baffle is fixedly connected to the rotating rod. A mounting plate is installed on the outer wall of the air inlet. An air-adjusting gear is rotatably connected to the mounting plate. The air-adjusting gear is fixedly connected to the rotating rod. A torsion spring is provided between the mounting plate and the air-adjusting gear. A speed reduction gear set is provided on the outer wall of the air inlet. The output end of the speed reduction gear set meshes with the air-adjusting gear. The input end of the speed reduction gear set is fixedly connected to a wire winding rod. The other end of the adjustment wire is wound around the wire winding rod.

[0013] Further, there are multiple rotating rods arranged in a linear array. Sprockets are fixedly connected to the rotating rods. A chain is arranged between the multiple sprockets. The mounting plate is fixedly connected to one of the sprockets.

[0014] Further, an adjustment component is further included. The adjustment component includes an adjustment sleeve. One end of the adjustment sleeve is fixedly connected to the water-ring vacuum pump. A through groove is provided on one side of the adjustment sleeve. An adjustment rack is slidably connected in the through groove. A wire winding column is fixedly connected to the adjustment rack. The adjustment wire spirally passes through the wire winding column. An adjustment gear is rotatably connected to one side of the adjustment sleeve. There are two through grooves. The adjustment gear meshes with the two adjustment racks at the same time.

[0015] Further, a knob is installed on the adjustment gear. A scale is provided on one side of the through groove. An indicating engraving adapted to the scale is provided on the adjustment rack.

[0016] Further, a limiting pulley is provided at the other end of the adjustment sleeve. The adjustment wire sequentially passes through the wire winding column and the limiting pulley.

[0017] Further, the water-ring vacuum pump includes two ends. The air inlet and the air outlet are both provided on the ends. A plurality of bolts are rotatably connected to the side walls of the ends. Flange plates corresponding to the bolts are provided at both ends of the water-ring vacuum pump.

[0018] Further, a sliding groove is provided in the sliding sleeve. The slider is slidably connected in the sliding groove. A connecting plate is installed in the sliding sleeve. The spring is installed between the slider and the connecting plate. Central holes and connecting holes are respectively provided on the sliding sleeve and the connecting plate. The adjustment wire sequentially passes through the connecting hole and the central hole.

[0019] Furthermore, a deep groove ball bearing with a sealing ring is provided at the connection between the sliding sleeve and the shaft of the water ring vacuum pump.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the present invention, through the collaborative work of the centrifugal component and the control component, the device can automatically adjust the rotational speed of the water ring vacuum pump according to the real-time change of the vacuum system pressure, without manual intervention, achieving precise and efficient pressure control, ensuring that the system pressure is stably within the set range, enhancing the reliability and stability of the system operation, being not easily affected by the environment, having a simple structure, low cost, and small later maintenance difficulty and low maintenance cost, which is conducive to the wide application in small and medium-sized enterprises.

[0022] In the present invention, by adjusting the rotational speed of the vacuum pump in real time, the rotational speed is reduced when the system pressure is low and the gas volume is small, reducing the consumption of the power medium; when the system pressure is high and the gas volume is large, the rotational speed is increased to avoid energy waste, effectively reducing the equipment operation cost, improving the energy utilization efficiency, avoiding the vacuum pump running at a high load or low efficiency for a long time, reducing mechanical wear caused by frequent start-stop or unreasonable rotational speed, reducing the probability of equipment failure, prolonging the service life of the water ring vacuum pump and related components, and reducing the maintenance cost and downtime.

[0023] In the present invention, by rotating the adjusting gear to change the adjustment range, the device can be precisely adjusted according to different working scenarios and system requirements. In some occasions with extremely high vacuum requirements and small system pressure fluctuations, the adjustment range can be narrowed to make the device more sensitive to pressure changes and achieve more refined rotational speed adjustment, improving the stability and accuracy of the vacuum system. While in some occasions with large pressure fluctuations, the adjustment range can be widened to ensure that the device can quickly respond to pressure changes and maintain the normal operation of the system. Description of the Drawings

[0024] Figure 1 is the overall structural schematic diagram of a rotational speed adaptive adjustment device for a vacuum pump;

[0025] Figure 2 is the sectional structural schematic diagram of a rotational speed adaptive adjustment device for a vacuum pump;

[0026] Figure 3 is Figure 2 the enlarged view at A in

[0027] Figure 4 is the side view of the control component of a rotational speed adaptive adjustment device for a vacuum pump;

[0028] Figure 5 is the other side view of the control component of a rotational speed adaptive adjustment device for a vacuum pump;

[0029] Figure 6 A side view of an adjustment component of a self - adaptive speed adjustment device for a vacuum pump;

[0030] Figure 7 The other side view of an adjustment component of a self - adaptive speed adjustment device for a vacuum pump.

[0031] In the figure: 1, water - ring vacuum pump; 11, air inlet; 12, air outlet; 2, centrifugal component; 21, sliding sleeve; 22, sliding groove; 23, slider; 24, connecting plate; 25, spring; 26, connecting hole; 27, central hole; 28, adjustment wire; 3, control component; 31, rotating rod; 32, baffle; 33, sprocket; 34, chain; 35, mounting plate; 36, air - regulating gear; 37, torsion spring; 38, reduction gear set; 39, wire - winding rod; 4, adjustment sleeve; 41, through - slot; 42, adjustment rack; 43, wire - winding post; 44, adjustment gear; 45, knob; 46, limit pulley; 47, scale; 48, indicating engraving. Specific embodiments

[0032] 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.

[0033] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0034] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0035] A self - adaptive speed adjustment device for a vacuum pump, including a water - ring vacuum pump 1. An air inlet 11 and an air outlet 12 are provided at both ends of the water - ring vacuum pump 1. It further includes a centrifugal component 2 and a control component 3. The centrifugal component 2 includes a sliding sleeve 21 fixedly connected to the shaft of the water - ring vacuum pump 1. A sliding groove 22 is provided in the sliding sleeve 21. A slider 23 is slidably connected in the sliding groove 22. A connecting plate 24 is installed in the sliding sleeve 21. A spring 25 is installed between the slider 23 and the connecting plate 24. Central holes 27 and connecting holes 26 are respectively provided in the sliding sleeve 21 and the connecting plate 24. An adjustment wire 28 passes through the connecting hole 26 and the central hole 27 in sequence. One end of the adjustment wire 28 is fixedly connected to the slider 23;

[0036] The control component 3 includes a rotating rod 31 rotatably connected to the air inlet 11. A baffle 32 is fixedly connected to the rotating rod 31. A mounting plate 35 is installed on the outer wall of the air inlet 11. An air-adjusting gear 36 is rotatably connected to the mounting plate 35. The air-adjusting gear 36 is fixedly connected to the rotating rod 31. A torsion spring 37 is arranged between the mounting plate 35 and the air-adjusting gear 36. A speed reduction gear set 38 is arranged on the outer wall of the air inlet 11. The output end of the speed reduction gear set 38 meshes with the air-adjusting gear 36. The input end of the speed reduction gear set 38 is fixedly connected to a winding rod 39. The other end of the adjusting wire 28 is wound around the winding rod 39.

[0037] The centrifugal component 2 is fixedly connected to the shaft of the water ring vacuum pump 1. When the water ring vacuum pump 1 operates, the shaft drives the sliding sleeve 21 to rotate, and the slider 23 moves along the sliding groove 22 under the action of centrifugal force.

[0038] A spring 25 is installed between the slider 23 and the connecting plate 24, playing a role in buffering and resetting.

[0039] One end of the adjusting wire 28 is fixedly connected to the slider 23, and the other end sequentially passes through the connecting hole 26 of the connecting plate 24 and the central hole 27 of the sliding sleeve 21, and is wound around the winding rod 39 of the control component 3.

[0040] In the control component 3, the rotating rod 31 is rotatably connected to the air inlet 11, and the baffle 32 fixed on the rotating rod 31 is used to adjust the opening degree of the air inlet 11;

[0041] The air-adjusting gear 36 is fixedly connected to the rotating rod 31. The torsion spring 37 between the mounting plate 35 and the air-adjusting gear 36 enables the air-adjusting gear 36 to maintain its initial position when not subjected to external forces;

[0042] The speed reduction gear set 38 connects the winding rod 39 and the air-adjusting gear 36, transmits and amplifies the rotation of the winding rod 39 to accurately control the rotation angle of the air-adjusting gear 36.

[0043] When the pressure of the vacuum system decreases, the amount of gas in the system decreases, the rotational speed of the water ring vacuum pump 1 decreases due to the reduction of centrifugal force, and the slider 23 contracts inward under the action of the spring 25, pulling the adjusting wire 28.

[0044] The adjusting wire 28 drives the winding rod 39 to rotate, and through the speed reduction gear set 38, the air-adjusting gear 36 rotates against the resistance of the torsion spring 37, and then drives the rotating rod 31 to rotate, so that the baffle 32 increases the opening degree of the air inlet 11, increases the supply of the power medium, increases the rotational speed of the vacuum pump, speeds up the pumping rate, and promotes the system pressure to rise back to the set range.

[0045] When the pressure of the vacuum system increases, the amount of gas in the system increases, the rotational speed of the vacuum pump rises resulting in an increase in centrifugal force, and the slider 23 slides outward against the elastic force of the spring 25, pushing the adjusting wire 28.

[0046] The adjusting wire 28 causes the wire winding rod 39 to rotate in the reverse direction, drives the air regulating gear 36 to rotate in the reverse direction through the reduction gear set 38, the rotating rod 31 rotates accordingly, the baffle 32 reduces the opening degree of the air inlet 11, reduces the supply of the power medium, reduces the rotational speed of the vacuum pump, and the air extraction rate drops, avoiding excessive reduction of the system pressure.

[0047] Through the coordinated operation of the centrifugal component 2 and the control component 3, the device can automatically adjust the rotational speed of the water ring vacuum pump 1 according to the real-time change of the vacuum system pressure, without manual intervention, realizing accurate and efficient pressure control, ensuring that the system pressure is stable within the set range, and enhancing the reliability and stability of the system operation.

[0048] By adjusting the rotational speed of the vacuum pump in real time, the rotational speed is reduced in the case of low system pressure and small gas volume to reduce the consumption of the power medium; the rotational speed is increased in the case of high system pressure and large gas volume to avoid energy waste, effectively reducing the equipment operation cost and improving the energy utilization efficiency.

[0049] By avoiding the long-term operation of the vacuum pump under high load or low efficiency conditions, reducing the mechanical wear caused by frequent start-stop or unreasonable rotational speed, reducing the probability of equipment failure, prolonging the service life of the water ring vacuum pump 1 and related components, and reducing the maintenance cost and downtime.

[0050] There are multiple rotating rods 31 arranged in a linear array. A sprocket 33 is fixedly connected to the rotating rod 31. A chain 34 is arranged between the multiple sprockets 33. The mounting plate 35 is fixedly connected to one of the sprockets 33.

[0051] The multiple rotating rods 31 are connected by the sprockets 33 and the chain 34, enabling them to rotate synchronously.

[0052] When the system pressure changes and the control component 3 needs to adjust the opening degree of the air inlet 11, the baffles 32 on each rotating rod 31 will rotate at the same angle and speed.

[0053] This ensures that the opening degree changes of different positions of the air inlet 11 are consistent, avoiding the unstable operation of the water ring vacuum pump 1 caused by uneven air intake.

[0054] In a large vacuum system, if the air intake is uneven, it may cause the imbalance of the water ring distribution inside the water ring vacuum pump 1, affecting the air extraction efficiency and the stability of the vacuum degree.

[0055] And this synchronous adjustment method can ensure the uniform distribution of the air intake volume of the entire air inlet 11, improving the working efficiency and stability of the water ring vacuum pump 1.

[0056] Synchronous adjustment can also reduce system fluctuations caused by untimely or inaccurate adjustment of individual rotating rods 31. Each rotating rod 31 can respond promptly to changes in system pressure, making the intake air adjustment more rapid and precise, which helps to quickly adjust the system pressure within the set range.

[0057] It further includes an adjustment assembly. The adjustment assembly includes an adjustment sleeve 4. One end of the adjustment sleeve 4 is fixedly connected to the water ring vacuum pump 1. A through groove 41 is provided on one side of the adjustment sleeve 4. An adjustment rack 42 is slidably connected in the through groove 41. A winding post 43 is fixedly connected to the adjustment rack 42. The adjustment wire 28 spirally passes through the winding post 43. An adjustment gear 44 is rotatably connected to one side of the adjustment sleeve 4. There are two through grooves 41, and the adjustment gear 44 meshes with the two adjustment racks 42 simultaneously.

[0058] One end of the adjustment sleeve 4 in the adjustment assembly is fixedly connected to the water ring vacuum pump 1, providing stable support for the adjustment action.

[0059] The through groove 41 provided on one side of the adjustment sleeve 4 is used for the sliding of the adjustment rack 42, and the winding post 43 on the adjustment rack 42 is used for the adjustment wire 28 to spirally pass through.

[0060] When the adjustment gear 44 is rotated, since the adjustment gear 44 meshes with the two adjustment racks 42 simultaneously, according to the gear transmission principle, the two adjustment racks 42 will perform linear motions in opposite directions in the through groove 41.

[0061] When the adjustment gear 44 rotates clockwise, the two adjustment racks 42 approach each other, and when rotated counterclockwise, the two adjustment racks 42 move away from each other.

[0062] The movement of the adjustment rack 42 will change the distance between the winding posts 43. Since the adjustment wire 28 spirally passes through the winding posts 43, the change in the distance between the winding posts 43 will cause a change in the effective length of the adjustment wire 28.

[0063] The change in the length of the adjustment wire 28 will affect the corresponding relationship between the position change of the slider 23 in the centrifugal assembly 2 and the adjustment of the air inlet 11 in the control assembly 3, thereby changing the adjustment range of the entire device.

[0064] When the distance between the winding posts 43 increases, the slider 23 moves the same distance under the same centrifugal force. The displacement change transmitted by the adjustment wire 28 to the control assembly 3 becomes relatively smaller, and the adjustment amplitude of the opening degree of the air inlet 11 will also decrease accordingly, that is, the adjustment range becomes narrower; conversely, when the distance between the winding posts 43 decreases, the adjustment range becomes wider.

[0065] By rotating the adjustment gear 44 to change the adjustment range, the device can be precisely adjusted according to different working scenarios and system requirements.

[0066] In some occasions where extremely high vacuum is required and the system pressure fluctuation is small, the adjustment range can be narrowed to make the device more sensitive to pressure changes, achieve finer rotational speed adjustment, and improve the stability and accuracy of the vacuum system.

[0067] In some occasions with large pressure fluctuations, the adjustment range can be widened to ensure that the device can quickly respond to pressure changes and maintain the normal operation of the system.

[0068] Different water ring vacuum pumps 1 have differences in performance and working requirements. Even for the same vacuum pump, different adjustment ranges may be required under different working conditions.

[0069] The addition of this adjustment component enables the device to adapt to various types of water ring vacuum pumps 1 and different working conditions, improving the versatility and compatibility of the device.

[0070] Users do not need to replace different adjustment devices for different vacuum pumps or working conditions, reducing equipment costs and maintenance difficulties.

[0071] During the installation and commissioning stage of the device, the operator can flexibly adjust the adjustment range by rotating the adjustment gear 44 according to the actual system operation conditions to make the device reach the best working state.

[0072] During the operation of the equipment, if it is found that the system pressure adjustment effect is not ideal, the adjustment range can also be adjusted at any time without large-scale disassembly and transformation of the device, greatly improving the efficiency of debugging and optimization.

[0073] By reasonably adjusting the adjustment range, the water ring vacuum pump 1 can operate within a more appropriate rotational speed range, avoiding excessive wear or fatigue damage of the equipment caused by improper rotational speed adjustment.

[0074] When the system pressure changes little, narrowing the adjustment range reduces the rotational speed fluctuation of the vacuum pump, reduces the mechanical impact and vibration of the equipment, and thus extends the service life of the equipment.

[0075] A knob 45 is installed on the adjustment gear 44. A scale table 47 is provided on one side of the through slot 41, and an indicating engraving 48 adapted to the scale table 47 is provided on the adjustment rack 42.

[0076] The knob 45 installed on the adjustment gear 44 provides an intuitive and easy-to-operate adjustment component for the operator. Compared with directly rotating the adjustment gear 44, the larger contact area and more ergonomic design of the knob 45 make the adjustment operation easy and labor-saving, greatly reducing the adjustment difficulty. Even in an environment with a relatively small space for the equipment, the adjustment operation can be carried out conveniently and quickly.

[0077] Meanwhile, the setting of the knob 45 makes the adjustment process smoother, reduces the adjustment error caused by uneven force application, and improves the adjustment efficiency.

[0078] The combined use of the scale 47 and the indicating mark 48 provides a quantitative reference for the adjustment process. When the operator rotates the knob 45 to adjust the position of the adjustment rack 42, they can clearly and intuitively understand the amplitude and degree of adjustment through the corresponding position of the indicating mark 48 on the scale 47, thereby achieving precise adjustment control.

[0079] This design avoids the uncertainty of previous adjustment based on experience, enables more accurate setting of the adjustment range, meets the stringent requirements for the pressure adjustment accuracy of the vacuum system under different working conditions, and further improves the adjustment performance and working reliability of the device.

[0080] At the other end of the adjusting sleeve 4, a limiting pulley 46 is provided, and the adjusting wire 28 passes through the winding post 43 and the limiting pulley 46 in sequence.

[0081] The limiting pulley 46 provided at the other end of the adjusting sleeve 4 provides stable guidance and support for the adjusting wire 28.

[0082] The adjusting wire 28 passes through the winding post 43 and the limiting pulley 46 in sequence. During the adjustment process, the limiting pulley 46 can effectively prevent problems such as offset and entanglement of the adjusting wire 28, ensuring that the adjusting wire 28 always stays on the correct running track.

[0083] This not only reduces the risk of damage to the adjusting wire 28 due to friction and wear, extends the service life of the adjusting wire 28, but also ensures the stability and accuracy of the adjustment signal transmission, makes the collaborative work between the centrifugal component 2 and the control component 3 more reliable, and improves the stability and safety of the operation of the entire device.

[0084] The water ring vacuum pump 1 includes two ends. Both the air inlet 11 and the air outlet 12 are provided on the ends. A plurality of bolts are rotatably connected to the side walls of the ends, and flange plates corresponding to the bolts are provided at both ends of the water ring vacuum pump 1.

[0085] Flange plates are provided at both ends of the water ring vacuum pump 1 and fastened by a plurality of bolts rotatably connected to the side walls of the ends. This design greatly improves the convenience of installation and maintenance.

[0086] During the installation process, the bolt connection method is simple to operate, can quickly and accurately connect the vacuum pump with other equipment or pipelines, and reduces the installation difficulty and installation time cost.

[0087] During maintenance, only by loosening the bolts, the vacuum pump can be easily disassembled, and the internal components can be repaired or replaced without a complex disassembly process.

[0088] In addition, the design with multiple bolts evenly distributed ensures the firmness and stability of the connection, enabling it to withstand the pressure and vibration generated during system operation, and guaranteeing the safe and reliable operation of the equipment.

[0089] A deep groove ball bearing with a sealing ring is provided at the connection between the sliding sleeve 21 and the shaft of the liquid ring vacuum pump 1.

[0090] The connection between the sliding sleeve 21 and the shaft of the liquid ring vacuum pump 1 adopts a deep groove ball bearing with a sealing ring, effectively enhancing the sealing performance of the device.

[0091] The sealing ring can closely fit the connection part of the shaft and the sliding sleeve 21, preventing the leakage of the working fluid (water) and gas, and preventing external air from entering the pump, ensuring the vacuum degree and working efficiency of the vacuum pump.

[0092] The deep groove ball bearing not only has good load-bearing capacity, can stably support the rotation of the sliding sleeve 21, but also can work together with the sealing ring to reduce the friction and wear between the shaft and the sliding sleeve 21, reduce the risk of equipment failure caused by leakage and wear, and extend the service life of the equipment.

[0093] At the same time, this sealing design helps to maintain the pressure stability in the system, avoid the interference of pressure fluctuations caused by leakage on the speed regulation of the vacuum pump, and ensure the reliability and stability of the operation of the entire device.

Claims

1. An adaptive speed regulation device for a vacuum pump, comprising a liquid ring vacuum pump (1), wherein an air inlet (11) and an air outlet (12) are arranged at two ends of the liquid ring vacuum pump (1), and it is characterized in that: It further includes a centrifugal assembly (2) and a control assembly (3). The centrifugal assembly (2) includes a sliding sleeve (21) fixedly connected to the shaft of the water-ring vacuum pump (1). A slider (23) is slidably connected in the sliding sleeve (21). A spring (25) is arranged between the sliding sleeve (21) and the slider (23). One end of an adjusting wire (28) is fixedly connected to the slider (23). The control assembly (3) includes a rotating rod (31) rotatably connected to the air inlet (11). A baffle (32) is fixedly connected to the rotating rod (31). A mounting plate (35) is installed on the outer wall of the air inlet (11). An air-adjusting gear (36) is rotatably connected to the mounting plate (35). The air-adjusting gear (36) is fixedly connected to the rotating rod (31). A torsion spring (37) is arranged between the mounting plate (35) and the air-adjusting gear (36). A speed-reducing gear set (38) is arranged on the outer wall of the air inlet (11). The output end of the speed-reducing gear set (38) meshes with the air-adjusting gear (36). The input end of the speed-reducing gear set (38) is fixedly connected to a wire-winding rod (39). The other end of the adjusting wire (28) is wound around the wire-winding rod (39).

2. The rotational speed adaptive adjustment device of a vacuum pump according to claim 1, wherein: There are multiple rotating rods (31) arranged in a linear array. A sprocket (33) is fixedly connected to the rotating rod (31). A chain (34) is arranged between multiple sprockets (33). The mounting plate (35) is fixedly connected to one of the sprockets (33).

3. The speed self - adaptive adjustment device of a vacuum pump according to claim 2, wherein: It further includes an adjusting assembly. The adjusting assembly includes an adjusting sleeve (4). One end of the adjusting sleeve (4) is fixedly connected to the water-ring vacuum pump (1). A through groove (41) is opened on one side of the adjusting sleeve (4). An adjusting rack (42) is slidably connected in the through groove (41). A wire-winding column (43) is fixedly connected to the adjusting rack (42). The adjusting wire (28) spirally passes through the wire-winding column (43). An adjusting gear (44) is rotatably connected to one side of the adjusting sleeve (4). There are two through grooves (41). The adjusting gear (44) meshes with two adjusting racks (42) simultaneously.

4. The self - adaptive speed regulation device of a vacuum pump according to claim 3, characterized in that: A knob (45) is installed on the adjusting gear (44). A scale (47) is opened on one side of the through groove (41). An indicating mark (48) adapted to the scale (47) is opened on the adjusting rack (42).

5. The rotational speed adaptive adjustment device of a vacuum pump according to claim 4, characterized in that: A limiting pulley (46) is arranged at the other end of the adjusting sleeve (4). The adjusting wire (28) passes through the wire-winding column (43) and the limiting pulley (46) in sequence.

6. The self - adaptive speed regulation device for a vacuum pump according to claim 5, wherein: The water-ring vacuum pump (1) includes two ends. The air inlet (11) and the air outlet (12) are both arranged on the ends. A plurality of bolts are rotatably connected to the side wall of the ends. Flange plates corresponding to the bolts are arranged at both ends of the water-ring vacuum pump (1).

7. The self - adaptive speed regulation device for a vacuum pump according to claim 6, characterized in that: A sliding groove (22) is provided in the sliding sleeve (21), the sliding block (23) is slidably connected in the sliding groove (22), a connecting plate (24) is installed in the sliding sleeve (21), and a spring (25) is installed between the sliding block (23) and the connecting plate (24). Central holes (27) and connection holes (26) are respectively provided in the sliding sleeve (21) and the connecting plate (24), and the adjusting wire (28) sequentially passes through the connection hole (26) and the central hole (27).

8. The self - adaptive speed regulation device for a vacuum pump according to claim 7, characterized in that: A deep groove ball bearing with a sealing ring is provided at the connection between the sliding sleeve (21) and the shaft of the water ring vacuum pump (1).

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