Double-layer vibration isolation low-noise variable frequency speed-adjusting asynchronous motor

Abstract

This invention relates to the field of asynchronous motor technology, specifically to a double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor, comprising a vibration damping mechanism, a variable frequency speed regulation mechanism, and a stabilization mechanism. In this invention, a complete closed-loop control system is constructed: vibration acceleration sensors, force sensors, and displacement sensors perceive the system state in real time and feed it back to the controller. After algorithmic decision-making, the controller drives an electromagnetic loop to adjust the damping characteristics of the magnetorheological fluid, changing the resistance of the piston rod within the liquid tube. This resistance change directly affects the sliding characteristics of the slider along the guide rail, thereby altering the vibration response of the spring and the force transmission path of the transmission plate, ultimately feeding back to the vibration state of the motor body. Within the full speed range of the motor body, the system continuously performs closed-loop regulation of "perception-decision-execution-feedback," enabling the vibration isolation characteristics to adaptively change in real time with operating conditions, achieving wide-bandwidth, high-efficiency double-layer vibration isolation and low-noise operation.

Description

Technical Field

[0001] This invention relates to the field of asynchronous motor technology, specifically to a double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor. Background Technology

[0002] Variable frequency speed-regulating asynchronous motors are widely used in industrial drives, rail transportation, and ship propulsion due to their advantages such as wide speed range, high speed regulation accuracy, and fast dynamic response. However, while achieving wide speed regulation, the variable frequency power supply method also introduces a large number of harmonic components. In addition to the fundamental frequency, the stator current also contains integer multiples of harmonics of the fundamental frequency and sideband components resulting from the interaction between the carrier wave and the fundamental frequency, causing a significant increase in the order and amplitude of the electromagnetic force wave. Compared to sinusoidal power supply, the vibration velocity of the motor under variable frequency power supply conditions can increase by 1.08 to 131.4 times, and the sound pressure level increases by 2.6 to 42.6 dB, making vibration and noise problems particularly prominent.

[0003] To suppress the transmission of motor vibration to the mounting foundation, a single-layer vibration isolation scheme is commonly used in engineering, where vibration isolators are installed between the motor feet and the foundation. These are typically elastic elements such as rubber isolators, metal springs, or air springs. The transmission characteristics of this type of vibration isolation system are determined by its natural frequency—the isolator only enters the effective isolation zone when the excitation frequency is higher than √2 times the system's natural frequency. For vibration isolation systems with fixed stiffness and damping parameters, the effective isolation bandwidth is relatively narrow, only achieving good attenuation of vibration components within a specific frequency band.

[0004] However, the excitation frequency of a variable frequency drive (VFD) motor changes significantly with its speed, often operating within a wide speed range from tens to hundreds of hertz. Under these conditions, the natural frequency of a fixed-parameter vibration isolator cannot adaptively adjust to changes in the excitation frequency. When the motor's operating frequency is close to or lower than the natural frequency of the isolation system, the isolator not only fails to attenuate vibrations but may also induce resonance amplification. When the operating frequency deviates significantly from the natural frequency, although the system can enter the isolation zone, its high-frequency vibration attenuation capability is limited, resulting in a significant decrease in isolation efficiency. Consequently, traditional single-layer fixed-parameter vibration isolation systems struggle to maintain ideal vibration isolation performance across the entire speed range of a VFD motor, exhibiting significant technical drawbacks such as poor high-frequency isolation and a high risk of resonance in the low-frequency range. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows: A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor includes a vibration damping mechanism, a variable frequency speed-regulating mechanism, and a stabilization mechanism. The vibration damping mechanism includes a motor body, four support legs threaded to the bottom of the motor body, four assembly platforms threaded to the bottom of the four support legs, a base located at the bottom of the assembly platforms, four transmission plates rotatably connected between adjacent assembly platforms and the base, a sleeve rotatably connected to the bottom of the assembly platforms, a telescopic rod slidably passing through the bottom end of the sleeve, springs fixed at both ends to the top of the sleeve and the bottom of the telescopic rod respectively, a guide rail fixed to the top of the base, and a slider slidably sleeved on the top of the guide rail and rotatably connected to the bottom end of the telescopic rod. The spring body is movably sleeved on the outside of the sleeve and the telescopic rod body. The variable frequency speed-regulating mechanism... The mechanism includes a piston rod fixed to the outside of the slider, a liquid pipe interference-fitted to the outer end of the piston rod, a container fixedly fitted to the top of the liquid pipe, an electromagnetic ring fitted to the outside of the liquid pipe, a vibration acceleration sensor fixed to the top of the motor body, four force sensors fixed to the top of the four assembly platforms, four displacement sensors fixed to the four sliders, and a controller located on one side of the bottom of the motor body. The liquid pipe, container, and electromagnetic ring are all fixed to the top of the guide rail. The electromagnetic ring, vibration acceleration sensor, force sensor, and displacement sensor are all electrically connected to the controller. A stabilization mechanism is also included, comprising a collar fixedly fitted to the middle of the motor body, a pull rope fixed to the bottom of the collar, and a pipeline shock absorber fixed to the bottom end of the pull rope.

[0007] By adopting the above technical solutions, a complete closed-loop control system is formed: vibration acceleration sensors, force sensors, and displacement sensors perceive the system status in real time and feed it back to the controller. After algorithm decision-making, the controller drives the electromagnetic loop to adjust the damping characteristics of the magnetorheological fluid, changing the movement resistance of the piston rod in the liquid tube. This resistance change directly affects the sliding characteristics of the slider along the guide rail, thereby changing the vibration response of the spring and the force transmission path of the transmission plate, and finally feeding back to the vibration state of the motor body. Within the full speed range of the motor body, the system continuously performs closed-loop adjustment of "sensing-decision-execution-feedback", so that the vibration isolation characteristics adapt to the real-time changes of the operating conditions, realizing wide-bandwidth, high-efficiency double-layer vibration isolation and low-noise operation.

[0008] In a preferred embodiment, the present invention can be further configured such that: four support legs are equally spaced and arranged in a ring, and the support legs, assembly platform, and base are all made of rigid metal material.

[0009] In a preferred embodiment, the present invention can be further configured as follows: four transmission plates close to each other are arranged in pairs, the two groups of transmission plates are arranged vertically, and the two transmission plates in each group are vertically symmetrical about the sleeve.

[0010] In a preferred embodiment, the present invention can be further configured such that: the liquid tube is composed of an L-tube, a horizontal tube, and a throat tube, the throat tube is integrally formed between the L-tube and the horizontal tube, and the electromagnetic ring is located outside the throat tube.

[0011] In a preferred embodiment, the present invention can be further configured such that: a reinforcing component is provided at the bottom of the motor body, the reinforcing component includes a star-shaped plate movably sleeved on the outside of the pull rope, a table frame fixedly sleeved on the outside of the star-shaped plate, and a plurality of weights inserted into the top of the star-shaped plate, the bottom of the base being in contact with the top of the table frame.

[0012] In a preferred embodiment, the present invention can be further configured such that: the cross-shaped plate has a circular opening suitable for the pull rope to pass through, and the diameter of the circular opening is larger than the diameter of the pull rope.

[0013] In a preferred embodiment, the present invention can be further configured as follows: multiple weights are arranged in groups of three, forming six groups, with the six groups of weights evenly spaced and arranged in a ring around the outside of the circular opening, and the weights of the three weights in each group decreasing sequentially from the inside to the outside.

[0014] In a preferred embodiment, the present invention may be further configured such that: the bottom of the base is provided with a disassembly assembly, the disassembly assembly including two threaded rods slidably connected between the base and the star plate, and four nuts respectively screwed to the two ends of the two threaded rods, the four nuts being respectively interference fit against both sides of the base.

[0015] In a preferred embodiment, the present invention can be further configured such that: a noise-reducing shell is movably sleeved on the outer side of the motor body, and the bottom of the noise-reducing shell is fixedly connected to the top of the four support legs.

[0016] In a preferred embodiment, the present invention can be further configured such that: a sealing plug is interference-fitted to the outer side of the piston rod body, and the sealing plug is screwed to the bottom end of the liquid pipe.

[0017] In a preferred embodiment, the present invention can be further configured such that: two locking clamps are fixedly sleeved on the outer side of the liquid pipe body, and the bottom of both locking clamps is fixedly connected to the top of the guide rail.

[0018] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. In this invention, a complete closed-loop control system is constructed: vibration acceleration sensor, force sensor, and displacement sensor perceive the system status in real time and feed it back to the controller. After algorithm decision-making, the controller drives the electromagnetic loop to adjust the damping characteristics of the magnetorheological fluid, changing the movement resistance of the piston rod in the liquid tube. This resistance change directly affects the sliding characteristics of the slider along the guide rail, thereby changing the vibration response of the spring and the force transmission path of the transmission plate, and finally feeding back to the vibration state of the motor body. Within the full speed range of the motor body, the system continuously performs closed-loop adjustment of "sensing-decision-execution-feedback", so that the vibration isolation characteristics adapt to the real-time changes of the operating conditions, realizing wide-bandwidth, high-efficiency double-layer vibration isolation and low-noise operation.

[0019] 2. In this invention, the table frame provides an auxiliary support path for the motor body that is independent of the vibration damping mechanism through the cross plate, and multiple weights provide optional additional mass for the system. Without changing the original structure of the vibration damping mechanism, the overall natural frequency of the system can be coarsely adjusted and optimized by adjusting the mass and stiffness of the reinforcing components, thereby further widening the vibration isolation frequency band.

[0020] 3. In this invention, the base and the star plate are detachably fixedly connected by a threaded rod and a nut. When it is necessary to add or remove weights or to inspect and maintain the vibration damping mechanism, simply loosen the nut and pull out the threaded rod to separate the base, along with the vibration damping mechanism and the motor body, from the star plate. This enables quick disassembly and assembly of the vibration damping mechanism and the reinforcement components, significantly reducing the difficulty of maintenance operations and downtime. Attached Figure Description

[0021] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the vibration damping mechanism of the present invention. Figure 3 This is a schematic diagram showing the disassembled structure of the vibration damping mechanism of the present invention; Figure 4 This is a schematic diagram of the variable frequency speed control mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the liquid tube of the present invention; Figure 6 This is a schematic diagram showing the disassembly relationship between the liquid tube and the sealing plug of the present invention; Figure 7 This is a schematic diagram of the stabilization mechanism of the present invention; Figure 8 This is a schematic diagram showing the relationship between the reinforcement component and the disassembly / reassembly component of the present invention.

[0022] Figure label: 100. Vibration damping mechanism; 110. Motor body; 120. Support leg; 130. Assembly table; 140. Base; 150. Transmission plate; 160. Rod sleeve; 170. Telescopic rod; 180. Spring; 190. Guide rail; 191. Slider; 200. Variable frequency speed control mechanism; 210. Piston rod; 220. Liquid pipe; 221. L-tube; 222. Horizontal pipe; 223. Throat pipe; 230. Container; 240. Electromagnetic ring; 250. Vibration acceleration sensor; 260. Force sensor; 270. Displacement sensor; 280. Controller; 300. Stabilization mechanism; 310. Loop; 320. Pull rope; 330. Pipeline shock absorber; 400. Reinforcing components; 410. Table frame; 420. Cross-shaped plate; 430. Weights; 500. Assembly / disassembly components; 510. Threaded rod; 520. Nut; 600, noise-reducing shell; 700. Sealing plug; 800, Locking clamp. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0025] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor.

[0026] Example 1: Combining Figures 1-8As shown, the present invention provides a double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor, including a vibration damping mechanism 100, a variable frequency speed-regulating mechanism 200, and a stabilization mechanism 300. The vibration damping mechanism 100 includes a motor body 110, four support legs 120 threaded to the bottom of the motor body 110, four assembly platforms 130 respectively threaded to the bottom of the four support legs 120, a base 140 disposed at the bottom of the assembly platform 130, and four rotatably connected between adjacent assembly platforms 130 and base 140. The transmission plate 150, the sleeve 160 rotatably connected to the bottom of the assembly table 130, the telescopic rod 170 slidably passing through the bottom end of the sleeve 160, the spring 180 fixed at both ends to the top end of the sleeve 160 and the bottom end of the telescopic rod 170 respectively, the guide rail 190 fixedly connected to the top of the base 140, and the slider 191 slidably sleeved on the top of the guide rail 190 and rotatably connected to the bottom end of the telescopic rod 170, the spring body of the spring 180 is movably sleeved on the outside of the sleeve 160 and the telescopic rod 170; The variable frequency speed control mechanism 200 includes a piston rod 210 fixed to the outside of the slider 191, a liquid pipe 220 interference-fitted to the outer end of the piston rod 210, a container 230 fixedly sleeved to the top of the liquid pipe 220, an electromagnetic ring 240 sleeved to the outside of the liquid pipe 220, a vibration acceleration sensor 250 fixed to the top of the motor body 110, four force sensors 260 respectively fixed to the top of the four assembly tables 130, four displacement sensors 270 respectively fixed to the four sliders 191, and a controller 280 located on one side of the bottom of the motor body 110. The liquid pipe 220, container 230, and electromagnetic ring 240 are all fixed to the top of the guide rail 190, and the electromagnetic ring 240, vibration acceleration sensor 250, force sensor 260, and displacement sensor 270 are all electrically connected to the controller 280. The stabilization mechanism 300 includes a collar 310 fixedly sleeved in the middle of the motor body 110, a pull rope 320 fixedly connected to the bottom of the collar 310, and a pipeline shock absorber 330 fixedly connected to the bottom end of the pull rope 320.

[0027] Furthermore, the four support legs 120 are evenly spaced and arranged in a ring. The support legs 120, the assembly table 130, and the base 140 are all made of rigid metal materials. The layout design of the support legs 120, as well as the use of rigid metal materials for the assembly table 130 and the base 140, ensure the stability of the motor body 110 during operation.

[0028] Furthermore, the four transmission plates 150, which are close to each other, are arranged in pairs, with the two groups of transmission plates 150 arranged vertically. The two transmission plates 150 in each group are vertically symmetrical about the sleeve 160. The layout design of the transmission plates 150 provides conditions for the base 140 to stably support the assembly table 130.

[0029] Furthermore, the liquid pipe 220 is composed of an L-tube 221, a horizontal pipe 222, and a throat 223. The throat 223 is integrally formed between the L-tube 221 and the horizontal pipe 222. The electromagnetic ring 240 is located outside the throat 223. When the magnetorheological fluid passes through the throat 223, the abrupt change in the flow channel cross-section forces the liquid to accelerate through the contraction zone, resulting in a local pressure drop and a sharp increase in shear rate. Then, the position of the electromagnetic ring 240 makes it easier for the chain structure of the magnetorheological fluid to form and be arranged more orderly in the high-speed shear flow field, and the adjustable range and adjustment sensitivity of the damping force are significantly improved.

[0030] Furthermore, a noise reduction shell 600 is movably sleeved on the outer side of the motor body 110. The bottom of the noise reduction shell 600 is fixedly connected to the top of the four support legs 120. The noise reduction shell 600 can reduce the noise transmission when the motor body 110 is working.

[0031] Furthermore, a sealing plug 700 is interference-fitted to the outer side of the piston rod 210. The sealing plug 700 is screwed to the bottom end of the liquid pipe 220. The sealing plug 700 can prevent the magnetorheological fluid in the liquid pipe 220 from leaking out.

[0032] Furthermore, two locking clamps 800 are fixedly sleeved on the outer side of the liquid pipe 220. The bottom of both locking clamps 800 is fixedly connected to the top of the guide rail 190. The locking clamps 800 can improve the installation firmness of the liquid pipe 220.

[0033] Example 2: Combination Figure 1 and Figure 8 As shown, based on Embodiment 1, the motor body 110 is provided with a reinforcing component 400 at its bottom. The reinforcing component 400 includes a star-shaped plate 420 movably sleeved on the outside of the pull rope 320, a table frame 410 fixedly sleeved on the outside of the star-shaped plate 420, and multiple weights 430 inserted into the top of the star-shaped plate 420. The bottom of the base 140 is in contact with the top of the table frame 410. The table frame 410 provides an auxiliary support path for the motor body 110 independent of the vibration damping mechanism 100 through the star-shaped plate 420. The multiple weights 430 provide optional additional mass for the system. Without changing the original structure of the vibration damping mechanism 100, by adjusting the mass and stiffness of the reinforcing component 400, the overall natural frequency of the system can be coarsely adjusted and optimized, further widening the vibration isolation frequency band.

[0034] Furthermore, the star-shaped plate 420 has a circular opening suitable for the pull rope 320 to pass through. The diameter of the circular opening is larger than the diameter of the pull rope 320. A non-contact clearance fit is formed between the star-shaped plate 420 and the pull rope 320, ensuring that the pull rope 320 can swing freely during the vibration of the motor body 110 without friction or interference with the star-shaped plate 420. This avoids the risk of the pull rope 320 breaking due to contact wear and prevents the vibration of the star-shaped plate 420 from being transmitted back to the motor body 110 through the pull rope 320, thus ensuring vibration isolation between the vibration damping mechanism 100 and the reinforcement component 400.

[0035] Furthermore, the weights 430 are arranged in groups of three, forming six groups. The six groups of weights 430 are evenly spaced and arranged in a ring around the outer side of the circular opening. The weights of the three weights 430 in each group decrease sequentially from the inside to the outside. The six groups of weights 430 are evenly distributed around the circumference of the star-shaped plate 420, making the added mass symmetrical and balanced in the circumferential direction, avoiding tilting of the star-shaped plate 420 or shift of the system's center of gravity due to off-center loading. The gradient configuration of the weights 430 decreasing from the inside to the outside makes the mass distribution closer to a continuous and uniform surface density, which is beneficial for suppressing the high-order modal vibration of the star-shaped plate 420 itself. At the same time, users can flexibly insert and remove weights 430 at different positions according to actual vibration isolation requirements, realizing rapid and on-demand adjustment of the added mass.

[0036] Example 3: Combination Figure 1 and Figure 8 As shown in the above embodiment, the base 140 is provided with a disassembly and assembly component 500 at its bottom. The disassembly and assembly component 500 includes two threaded rods 510 slidably connected between the base 140 and the star plate 420, and four nuts 520 screwed to the two ends of the two threaded rods 510 respectively. The four nuts 520 are respectively press-fitted to both sides of the base 140. The base 140 and the star plate 420 are detachably fixedly connected by the threaded rods 510 and the nuts 520. When it is necessary to add or remove weights 430 or to inspect and maintain the vibration damping mechanism 100, it is only necessary to loosen the nuts 520 and pull out the threaded rods 510 to separate the base 140 together with the vibration damping mechanism 100 and the motor body 110 from the star plate 420, realizing quick disassembly and assembly of the vibration damping mechanism 100 and the reinforcement component 400, which significantly reduces the difficulty of maintenance operations and downtime.

[0037] Working principle and usage process of this invention: Before this device is put into actual use, the container 230 is filled with magnetorheological fluid.

[0038] Passive response of double-layer vibration isolation structure The vibration generated by the motor body 110 during operation is first transmitted to the four assembly tables 130 via the four support legs 120 connected by the bottom thread. The transmission plate 150, the sleeve 160, the telescopic rod 170 and the spring 180 between the assembly table 130 and the base 140 constitute the first layer of vibration isolation path: the two ends of the transmission plate 150 are rotatably connected to the assembly table 130 and the base 140 respectively, which converts the vertical vibration of the motor body 110 into relative sliding between the sleeve 160 and the telescopic rod 170. Then the guide rail 190 and the slider 191 cooperate to provide support. Then, the weakened vibration force is directly transmitted to the piston rod 210. The liquid pipe 220 and the container 230 form the second layer of vibration isolation path. That is, the magnetorheological fluid in the container 230, under the action of weight, contacts the inner end of the piston rod 210 through the liquid pipe 220. The piston rod 210 reciprocates to squeeze the magnetorheological fluid into the container 230, thus achieving the second layer of vibration reduction.

[0039] Real-time acquisition of multi-source signals During the operation of the motor body 110, the vibration acceleration sensor 250 installed on the top of the motor body 110 collects the vibration acceleration signal of the motor body 110 in real time; the four force sensors 260 installed on the top of the four assembly tables 130 collect the dynamic load transmitted by each support point; the four displacement sensors 270 installed on the four sliders 191 collect the displacement of each slider 191 sliding along the guide rail 190, which directly reflects the degree of compression / tension deformation of the second layer of vibration isolation springs 180; the above three types of sensors transmit the collected electrical signals to the controller 280 in real time; Intelligent regulation The controller 280 performs comprehensive processing and calculation on the signal through a built-in algorithm to determine the vibration intensity, load distribution, and deformation state of the vibration isolation element of the current motor body 110. Based on this, it outputs a control current to the electromagnetic ring 240 sleeved on the outside of the liquid pipe 220. The magnetorheological fluid inside the liquid pipe 220 flexibly changes its chain structure under a controllable magnetic field, thereby adjusting the damping force. When the vibration amplitude increases, the controller 280 increases the current, the magnetic field strengthens, the magnetorheological fluid tends to become almost solid, the damping force increases, and the energy dissipation and vibration reduction effect is enhanced. When the vibration amplitude decreases, the controller 280 decreases the current, the magnetic field weakens, the magnetorheological fluid restores its fluidity, the damping force decreases, and the system maintains a sensitive response to small vibrations. Assisted stability In the middle of the motor body 110, a fixed collar 310 is connected to the bottom pipeline vibration damper 330 via a pull rope 320. The pipeline vibration damper 330 is used to constrain and buffer the vibration amplitude of the motor body 110, further ensuring the working stability of the motor body 110.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor, characterized in that, include: The vibration damping mechanism (100) includes a motor body (110), four support legs (120) threaded to the bottom of the motor body (110), four assembly tables (130) threaded to the bottom of the four support legs (120) respectively, a base (140) disposed at the bottom of the assembly table (130), four transmission plates (150) rotatably connected between adjacent assembly tables (130) and bases (140), and a rod rotatably connected to the bottom of the assembly table (130). The sleeve (160), the telescopic rod (170) that slides through the bottom end of the sleeve (160), the spring (180) that is fixed at both ends to the top end of the sleeve (160) and the bottom end of the telescopic rod (170) respectively, the guide rail (190) that is fixed to the top of the base (140), and the slider (191) that is slidably sleeved on the top of the guide rail (190) and rotatably connected to the bottom end of the telescopic rod (170), wherein the spring body of the spring (180) is movably sleeved on the outside of the sleeve (160) and the telescopic rod (170); The variable frequency speed control mechanism (200) includes a piston rod (210) fixed to the outside of the slider (191), a liquid pipe (220) interference-fitted to the outer end of the piston rod (210), a container (230) fixedly fitted to the top of the liquid pipe (220), an electromagnetic ring (240) fitted to the outside of the liquid pipe (220), a vibration acceleration sensor (250) fixed to the top of the motor body (110), and four assembly tables (191, 20 ... 30) The four force sensors (260) at the top, the four displacement sensors (270) fixed to the four sliders (191) respectively, and the controller (280) located on one side of the bottom of the motor body (110), the liquid pipe (220), the container (230), and the electromagnetic ring (240) are all fixed to the top of the guide rail (190), and the electromagnetic ring (240), the vibration acceleration sensor (250), the force sensor (260), and the displacement sensor (270) are all electrically connected to the controller (280); The stabilization mechanism (300) includes a collar (310) fixedly sleeved in the middle of the motor body (110), a pull rope (320) fixedly connected to the bottom of the collar (310), and a pipeline shock absorber (330) fixedly connected to the bottom end of the pull rope (320).

2. The double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The four support legs (120) are evenly spaced and arranged in a ring. The support legs (120), the assembly table (130), and the base (140) are all made of rigid metal material.

3. The double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The four transmission plates (150) that are close to each other are arranged in pairs, and the two groups of transmission plates (150) are arranged vertically. The two transmission plates (150) in each group are vertically symmetrical about the sleeve (160).

4. The double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The liquid tube (220) is composed of an L-tube (221), a horizontal tube (222) and a throat tube (223). The throat tube (223) is integrally formed between the L-tube (221) and the horizontal tube (222). The electromagnetic ring (240) is located outside the throat tube (223).

5. The double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The motor body (110) is provided with a reinforcing component (400) at the bottom. The reinforcing component (400) includes a cross plate (420) movably sleeved on the outside of the pull rope (320), a table frame (410) fixedly sleeved on the outside of the cross plate (420), and multiple weights (430) inserted into the top of the cross plate (420). The bottom of the base (140) is in contact with the top of the table frame (410).

6. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 5, characterized in that, The cross-shaped plate (420) has a circular opening suitable for the pull rope (320) to pass through, and the diameter of the circular opening is larger than the diameter of the pull rope (320).

7. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 6, characterized in that, Multiple weights (430) are arranged in groups of three, forming six groups. The six groups of weights (430) are evenly spaced and arranged in a ring around the outside of the circular opening. The weights of the three weights (430) in each group decrease sequentially from the inside to the outside.

8. The double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The base (140) is provided with a disassembly assembly (500) at the bottom. The disassembly assembly (500) includes two threaded rods (510) slidably connected between the base (140) and the star plate (420), and four nuts (520) screwed to both ends of the two threaded rods (510) respectively. The four nuts (520) are respectively press-fitted to both sides of the base (140).

9. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The motor body (110) is movably fitted with a noise reduction shell (600) on the outside of the motor body, and the bottom of the noise reduction shell (600) is fixedly connected to the top of the four support legs (120).

10. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, The piston rod (210) has an interference fit on the outside of the rod body with a sealing plug (700), and the sealing plug (700) is screwed to the bottom end of the liquid pipe (220).

11. A double-layer vibration-isolated, low-noise variable frequency speed-regulating asynchronous motor according to claim 1, characterized in that, Two locking clamps (800) are fixedly sleeved on the outside of the liquid pipe (220), and the bottom of the two locking clamps (800) is fixedly connected to the top of the guide rail (190).

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