Resonance control device and method for submersible mixer

Abstract

The invention discloses a resonance control device and method for a submersible mixer, and relates to the technical field of submersible mixers. The resonance control device comprises a shell, a tail plate fixed to one end of the shell and a stirring part movably installed at one end of the shell, a power motor is fixed in the shell, a power shaft is fixed to the output end of the power motor, a supporting rod is fixed to the power shaft, and the tail plate is fixed to the tail plate. One end of the supporting rod is fixed on the shell, the other end of the supporting rod is fixed on the stirring part, an adjusting assembly for adjusting vibration and a sealing assembly for enhancing sealing are arranged in the shell, and the adjusting assembly comprises a fixed seat which is fixed in the shell and is used for providing supporting force for the adjusting assembly; the servo motor is fixed on the fixed seat, a rotating shaft is fixed at the output end of the servo motor, an eccentric wheel is fixed at one end of the rotating shaft, and the eccentric wheel abuts against the power shaft to generate reverse rotating torque to counteract abnormal vibration of the main shaft, so that premature abrasion of equipment is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of submersible mixers, and in particular to a submersible mixer resonance control device and method. Background Art

[0002] Submersible mixers, also known as submersible thrusters, are suitable for the process flow of sewage treatment plants to propel and stir sewage containing suspended matter, slurry, industrial process liquids, etc. They are important equipment in the process flow of municipal and industrial sewage treatment. They are divided into mixed submersible mixers and low-speed submersible thrust mixers. The mixed mixing series products use multi-pole motors and adopt a direct-connected structure with low energy consumption and high efficiency. The impellers are formed by precision casting or stamping, with high precision, large thrust, beautiful and smooth appearance, and compact structure. The low-speed push flow series products use cycloid pinwheel reducers or gear reducers, equipped with low power, low speed, large impeller diameter, and wide service area. The impeller is cast from polyurethane and aluminum alloy (also made of fiberglass), with high strength and strong corrosion resistance. In addition to the stirring function, it can also push flow and create water flow.

[0003] During operation, the existing submersible mixers may cause the impeller of the submersible mixer to operate in a state of dynamic balance destruction due to changes in water quality and water flow, and the entanglement of debris, resulting in excessive vibration, and even resonance, causing the body structure to loosen, and the transmission bearing to abnormally impact, wear, and damage. The watertight device vibrates out of roundness, destroys the watertight function, and leaks and damages the motor and transmission system. For example, the submersible mixer disclosed in the publication number CN219502613U has the problem that although the overall vibration of the submersible mixer is weakened, the vibration still affects the power shaft itself, causing the body structure to loosen, and the transmission bearing to abnormally impact, wear, and damage.

[0004] Therefore, a submersible mixer resonance control device and method are proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a submersible mixer resonance control device and method, which solves the problem that the impeller of the submersible mixer runs in a state of dynamic balance destruction due to changes in water quality and water flow and entanglement of debris, resulting in excessive vibration and even resonance causing the body structure to loosen and the transmission bearing to suffer abnormal impact, wear and damage.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a submersible mixer resonance control device, comprising a shell, a tail plate fixed at one end of the shell, and a stirring part movably installed at one end of the shell, a power motor is fixed in the shell, a power shaft is fixed on the output end of the power motor, a support rod is fixed on the power shaft, and the other end of the support rod is fixed on the stirring part, an adjustment component for adjusting vibration and a sealing component for strengthening sealing are arranged in the shell, and the adjustment component includes:

[0007] A fixing seat, fixed in the housing, for providing support force to the adjustment assembly;

[0008] The servo motor is fixed on the fixing seat and is used to provide power to the adjusting component. A rotating shaft is fixed on the output end of the servo motor, and an eccentric wheel is fixed on one end of the rotating shaft.

[0009] Preferably, one end of the rotating shaft is inserted into a fixing seat, the rotating shaft and the fixing seat are movably connected, and a vibration sensor is fixed on a side wall of the fixing seat.

[0010] Preferably, a main cable is passed through the shell, and the main cable includes a branch cable 1 and a branch cable 2. The branch cable 1 is used to supply power to the power motor, and the branch cable 2 is used to supply power to the servo motor and the vibration sensor.

[0011] Preferably, a fixing plate included in the sealing assembly is fixed in the shell, an electric push rod is fixedly inserted in the fixing plate, a sealing plate is fixed to one end of the electric push rod, one side wall of the sealing plate abuts against the outer surface of the main cable, a power push rod is fixed on the side wall of the electric push rod, and one end of the power push rod is inclined.

[0012] Preferably, a driven push block is slidably abutted on one inclined end of the power push rod, a sliding rod is fixed to the side wall of the driven push block, a pressure plate is fixed to the bottom of the sliding rod, a spring is fixed to the top of the sliding rod, a fixed sleeve is fixed to the other end of the spring, one end of the fixed sleeve is fixed in the shell, and one end of the sliding rod is slidably inserted into the fixed sleeve.

[0013] Preferably, an airbag is abutted against the bottom of the pressure plate, and the airbag is connected to the sealing plate through a connecting tube. An air pipe is fixed to the top of the sealing plate, a reinforcing plate is fixed to one end of the air pipe, and the side wall of the reinforcing plate abuts against the main cable and the shell, and a positioning rod is fixed to the bottom of the reinforcing plate, and one end of the positioning rod is fixed to the top of the sealing plate.

[0014] The present invention also provides a method for adjusting a resonance control device for a submersible mixer, comprising the following steps:

[0015] S1. Put the shell into water and start the power motor to stir;

[0016] S2. detecting the vibration frequency and amplitude of the power shaft by adjusting the vibration sensor in the assembly;

[0017] S3, according to the detected vibration frequency and amplitude, the servo motor in the adjustment component drives the eccentric wheel to rotate to tighten or loosen the power shaft;

[0018] S4. Strengthen the sealing between the shell and the main cable through the sealing assembly.

[0019] Preferably, the rotation range of the eccentric wheel is between 0-90°.

[0020] The present invention provides a submersible mixer resonance control device and method. Compared with the prior art, it has the following beneficial effects:

[0021] (1) The submersible mixer resonance control device and method are provided with a shell, a stirring part, a tail plate, a fixing ring, a main cable, a branch cable 1, a branch cable 2, a power motor, a power shaft, and a support rod. Electricity is introduced into the shell through the main cable, and then the branch cables 1 and 2 are used to supply the power motor and other power components to ensure the normal operation of each power component. The shell provides support force for the stirring part, and the fixing ring strengthens the connection between the two shells. The power motor drives the power shaft to rotate, the power shaft drives the support rod to rotate, and the support rod drives the stirring part to rotate, thereby stirring the sewage or thin mud in the water, strengthening the stirring function, and preventing sludge precipitation.

[0022] (2) The submersible mixer resonance control device and method are provided with a vibration sensor, an eccentric wheel, a rotating shaft, a servo motor, and a fixed seat. The fixed seat provides a supporting force, and the vibration frequency and amplitude of the stirring part are detected by the vibration sensor. The speed of the power motor is adjusted by the speed electronic control system, thereby changing the speed of the stirring part to avoid the vibration peak area, reducing the vibration frequency and amplitude of the stirring part, and extending the service life of the equipment. At the same time, the operating state of the servo motor is adjusted according to the signal detected by the vibration sensor. The servo motor drives the rotating shaft, and the rotating shaft drives the eccentric wheel to rotate. The eccentric wheel presses against the power shaft to generate a reverse rotation torque to offset the abnormal vibration of the main shaft, thereby preventing premature wear of the equipment.

[0023] (3) The submersible mixer resonance control device and method are provided with an electric push rod, a fixed plate, a sealing plate, a power push rod, a driven push block, a sliding rod, a pressure plate, a spring, a fixed sleeve, an air bag, an air pipe, a reinforcing plate, and a positioning rod. The fixed plate provides a supporting force to the electric push rod through the shell, and the fixed plate provides a supporting force to the electric push rod. When the main cable is inserted into the shell, the electric push rod is started to drive the sealing plate to move, so that the two sealing plates are close to each other to clamp the main cable. At the same time, the reinforcing plate can also expand and press against the connection between the main cable and the shell, so that the connection between the main cable and the shell can be fully sealed, thereby improving the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention;

[0026] Figure 3 It is a side cross-sectional schematic diagram of the housing of the present invention;

[0027] Figure 4 It is a schematic diagram of the position of the servo motor of the present invention;

[0028] Figure 5 It is a schematic diagram of the overall state of the sealing assembly of the present invention;

[0029] Figure 6 It is a schematic diagram of the assembled state of the sealing assembly of the present invention;

[0030] Figure 7 It is a schematic diagram of the exploded state of the sealing component of the present invention.

[0031] In the figure: 1. Shell; 11. Stirring part; 12. Tail plate; 13. Fixed ring; 14. Main cable; 141. Branch cable 1; 142. Branch cable 2; 2. Power motor; 21. Power shaft; 22. Support rod; 23. Vibration sensor; 24. Eccentric wheel; 25. Rotating shaft; 26. Servo motor; 27. Fixed seat; 3. Electric push rod; 31. Fixed plate; 32. Sealing plate; 33. Power push rod; 34. Driven push block; 35. Sliding rod; 36. Pressure plate; 37. Spring; 38. Fixed sleeve; 39. Airbag; 310. Air pipe; 311. Reinforcement plate; 312. Positioning rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 7 , the present invention provides the following technical solutions:

[0034] Embodiment 1: A resonance control device for a submersible mixer comprises a shell 1, a tail plate 12 fixedly mounted on one end of the shell 1, a stirring portion 11 movably mounted on one end of the shell 1 through a bearing, a power motor 2 fixedly mounted in the shell 1, a power shaft 21 fixedly mounted on the output end of the power motor 2 through a coupling, three support rods 22 fixedly mounted on the power shaft 21, the other ends of the three support rods 22 are fixedly mounted on the inner wall of the stirring portion 11, a main cable 14 is slidably passed through the shell 1, the main cable 14 comprises a branch cable 1 141 and a branch cable 2 142, the branch cable 1 141 is used to supply power to the power motor 2, the number of branch cables 142 is two, and the two branch cables 142 are respectively used to supply power to a servo motor 26 and a vibration sensor 23.

[0035] When in use, electricity is introduced into the shell 1 through the main cable 14, and then the power motor 2 and other power components are powered by the branch cable 141 and the branch cable 2 142 to ensure the normal operation of each power component, provide support force for the stirring part 11 through the shell 1, and strengthen the connection between the two shells 1 through the fixing ring 13. The power motor 2 drives the power shaft 21 to rotate, the power shaft 21 drives the support rod 22 to rotate, and the support rod 22 drives the stirring part 11 to rotate.

[0036] Embodiment 2: A submersible mixer resonance control device comprises a housing 1, a tail plate 12 fixedly mounted at one end of the housing 1, a stirring part 11 movably mounted at one end of the housing 1 through a bearing, a power motor 2 fixedly mounted in the housing 1, a power shaft 21 fixedly mounted on the output end of the power motor 2 through a coupling, three support rods 22 fixedly mounted on the power shaft 21, the other ends of the three support rods 22 are fixedly mounted on the inner wall of the stirring part 11, and an adjustment component for adjusting vibration is arranged in the housing 1, and the adjustment component comprises:

[0037] One end of the fixing seat 27 is fixedly mounted on the inner wall of the housing 1 to provide support force for the adjustment assembly;

[0038] One end of the servo motor 26 is fixedly mounted on the outer surface of the fixed seat 27 to provide power to the adjustment component. A rotating shaft 25 is fixedly mounted on the output end of the servo motor 26 through a coupling. An eccentric wheel 24 is fixedly mounted on one end of the rotating shaft 25. One end of the rotating shaft 25 is inserted into the fixed seat 27. The rotating shaft 25 and the fixed seat 27 are movably connected through a bearing. A vibration sensor 23 is fixedly mounted on the side wall of the fixed seat 27.

[0039] A main cable 14 is slidably passed through the shell 1, and the main cable 14 includes a branch cable 1 141 and a branch cable 2 142. The branch cable 1 141 is used to supply power to the power motor 2, and there are two branch cables 142. The two branch cables 142 are used to supply power to the servo motor 26 and the vibration sensor 23 respectively.

[0040] When in use, the power is introduced into the housing 1 through the main cable 14, and then the power motor 2 and other power components are powered by the branch cable 141 and the branch cable 2 142 to ensure the normal operation of each power component, and the stirring part 11 is provided with supporting force through the housing 1, and the connection between the two housings 1 is strengthened through the fixing ring 13, and the power motor 2 drives the power shaft 21 to rotate, the power shaft 21 drives the support rod 22 to rotate, and the support rod 22 drives the stirring part 11 to rotate;

[0041] The supporting force is provided by the fixing seat 27, the vibration frequency and amplitude of the stirring part 11 are detected by the vibration sensor 23, and the speed of the power motor 2 is adjusted by the speed electronic control system, so as to change the speed of the stirring part 11 to avoid the vibration peak area, reduce the vibration frequency and amplitude of the stirring part 11, and extend the service life of the equipment. At the same time, the operating state of the servo motor 26 is adjusted by the signal detected by the vibration sensor 23, and the servo motor 26 drives the rotating shaft 25, and the rotating shaft 25 drives the eccentric wheel 24 to rotate, and the eccentric wheel 24 presses against the power shaft 21, thereby generating a reverse rotation torque to offset the abnormal vibration of the power shaft 21.

[0042] Embodiment 3, the technical solution of this embodiment is different from that of embodiment 2 in that: the main cable 14 also includes a branch cable 3 for supplying power to the electric push rod 3, a sealing assembly for strengthening the seal is provided in the housing 1, and the sealing assembly includes the electric push rod 3, a fixing plate 31, a sealing plate 32, a power push rod 33, a driven push block 34, a sliding rod 35, a pressing plate 36, a spring 37, a fixing sleeve 38, an air bag 39, an air pipe 310, a reinforcing plate 311, and a positioning rod 312, and the number of the sealing assemblies is two groups, and the two groups of sealing assemblies are symmetrically distributed on both sides of the main cable 14;

[0043] The connection relationship between the parts in a single set of sealing components is as follows:

[0044] A fixing plate 31 is fixedly installed on the inner wall of the shell 1, and an electric push rod 3 is fixedly installed in the fixing plate 31. A sealing plate 32 is fixedly installed at one end of the electric push rod 3. One side wall of the sealing plate 32 abuts against the outer surface of the main cable 14. A power push rod 33 is fixedly installed on the side wall of the electric push rod 3. One end of the power push rod 33 is tilted. One end of the power push rod 33 is slidably abutted against a driven push block 34. A sliding rod 35 is fixedly installed on the side wall of the driven push block 34. A pressing plate 36 is fixedly installed at the bottom of the sliding rod 35. A spring 37 is fixedly installed on the top of the sliding rod 35. The other end of the spring 37 is fixedly installed on the inner wall of a fixing sleeve 38. One end of the fixing sleeve 38 is fixedly installed in the shell 1, and one end of the sliding rod 35 is slidably inserted into the fixing sleeve 38.

[0045] The bottom of the pressure plate 36 abuts against an air bag 39, and the air bag 39 is connected to the sealing plate 32 through a connecting pipe. A positioning plate is fixedly installed on the side wall of the sealing plate 32, and the bottom of the air bag 39 is fixedly installed on the side wall of the positioning plate. An air pipe 310 is fixedly installed on the top of the sealing plate 32, and a reinforcing plate 311 is fixedly installed at one end of the air pipe 310. The reinforcing plate 311 is a hollow rubber bag, and the side wall of the reinforcing plate 311 abuts against the main cable 14 and the shell 1. Two positioning rods 312 are fixedly installed on the bottom of the reinforcing plate 311, and the other ends of the two positioning rods 312 are fixedly installed on the top of the sealing plate 32.

[0046] When in use, the housing 1 provides a supporting force to the fixing plate 31, and the fixing plate 31 provides a supporting force to the electric push rod 3. When the main cable 14 is inserted into the housing 1, the electric push rod 3 is started to drive the sealing plate 32 to move, so that the two sealing plates 32 are close to each other to clamp the main cable 14, and the electric push rod 3 simultaneously drives the power push rod 33 to move, and the power push rod 33 squeezes the driven push block 34 to move, and the driven push block 34 drives the sliding rod 35 to move to the side close to the airbag 39, and the sliding rod 35 and the fixing sleeve 38 are slidably matched, and the housing 1 provides a supporting force to the fixing sleeve 38, and the sliding rod 35 drives the pressing plate 36 to move, so that the pressing plate 36 squeezes the airbag 39, squeezes the gas in the airbag 39 into the inner cavity of the fixing plate 31, and is transported to the reinforcing plate 311 through the air pipe 310, so that the reinforcing plate 311 expands and presses against the connection between the main cable 14 and the housing 1, and the sealing plate 32 provides a supporting force to the positioning rod 312, and the positioning rod 312 provides a supporting force to the reinforcing plate 311;

[0047] When the main cable 14 needs to be removed, the electric push rod 3 drives the power push rod 33 and the sealing plate 32 to move away from the main cable 14, so that the power push rod 33 no longer applies a force to the driven push block 34, and the driven push block 34 no longer applies a force to the sliding rod 35. At this time, the sliding rod 35 will be reset to the side close to the fixing sleeve 38 under the action of the spring 37. At this time, the sealing plate 32 and the reinforcing plate 311 are separated from the main cable 14, and the main cable 14 can be taken out.

[0048] The present invention also provides a method for adjusting a resonance control device for a submersible mixer, comprising the following steps:

[0049] S1, putting the housing 1 into water and starting the power motor 2 to perform stirring operation;

[0050] S2, detecting the vibration frequency and amplitude of the power shaft 21 by adjusting the vibration sensor 23 in the assembly;

[0051] S3, according to the detected vibration frequency and amplitude, the servo motor 26 in the adjustment component drives the eccentric wheel 24 to rotate to tighten or loosen the power shaft 21;

[0052] S4. Strengthen the sealing between the housing 1 and the main cable 14 by using a sealing assembly.

[0053] The rotation range of the eccentric wheel 24 is between 0-90°.

[0054] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A submersible mixer resonance control device, comprising a housing (1), a tail plate (12) fixed to one end of the housing (1), and a stirring portion (11) movably mounted to one end of the housing (1), characterized in that: A power motor (2) is fixed in the housing (1), a power shaft (21) is fixed on the output end of the power motor (2), a support rod (22) is fixed on the power shaft (21), and the other end of the support rod (22) is fixed on the stirring part (11). An adjustment component for adjusting vibration and a sealing component for strengthening sealing are arranged in the housing (1), and the adjustment component includes: A fixing seat (27), fixed in the housing (1) and used to provide a supporting force for the adjustment component; A servo motor (26) is fixed on a fixing seat (27) and is used to provide power to the adjustment component. A rotating shaft (25) is fixed on the output end of the servo motor (26), and an eccentric wheel (24) is fixed on one end of the rotating shaft (25).

2. A submersible mixer resonance control device according to claim 1, characterized in that: One end of the rotating shaft (25) is inserted into the fixing seat (27), the rotating shaft (25) and the fixing seat (27) are movably connected, and a vibration sensor (23) is fixed on the side wall of the fixing seat (27).

3. A submersible mixer resonance control device according to claim 1, characterized in that: A main cable (14) is inserted into the housing (1), and the main cable (14) includes a first branch cable (141) and a second branch cable (142). The first branch cable (141) is used to supply power to the power motor (2), and the second branch cable (142) is used to supply power to the servo motor (26) and the vibration sensor (23).

4. A submersible mixer resonance control device according to claim 1, characterized in that: A fixing plate (31) included in a sealing assembly is fixed in the housing (1), an electric push rod (3) is fixedly inserted in the fixing plate (31), a sealing plate (32) is fixed to one end of the electric push rod (3), one side wall of the sealing plate (32) abuts against the outer surface of the main cable (14), a power push rod (33) is fixed on the side wall of the electric push rod (3), and one end of the power push rod (33) is inclined.

5. A submersible mixer resonance control device according to claim 4, characterized in that: A driven push block (34) is slidably abutted on one end of the power push rod (33) which is tilted, a sliding rod (35) is fixed to the side wall of the driven push block (34), a pressure plate (36) is fixed to the bottom of the sliding rod (35), a spring (37) is fixed to the top of the sliding rod (35), a fixing sleeve (38) is fixed to the other end of the spring (37), one end of the fixing sleeve (38) is fixed in the housing (1), and one end of the sliding rod (35) is slidably inserted into the fixing sleeve (38).

6. A submersible mixer resonance control device according to claim 5, characterized in that: The bottom of the pressure plate (36) is in contact with an air bag (39), and the air bag (39) is connected to the sealing plate (32) through a connecting pipe. An air pipe (310) is fixed to the top of the sealing plate (32), and a reinforcing plate (311) is fixed to one end of the air pipe (310). The side wall of the reinforcing plate (311) is in contact with the main cable (14) and the housing (1). A positioning rod (312) is fixed to the bottom of the reinforcing plate (311), and one end of the positioning rod (312) is fixed to the top of the sealing plate (32).

7. A method for adjusting a submersible mixer resonance control device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, placing the housing (1) into water and starting the power motor (2) to perform a stirring operation; S2, detecting the vibration frequency and amplitude of the power shaft (21) by means of a vibration sensor (23) in the adjustment component; S3, according to the detected vibration frequency and amplitude, using the servo motor (26) in the adjustment component to drive the eccentric wheel (24) to rotate and tighten or loosen the power shaft (21); S4. Strengthen the sealing between the housing (1) and the main cable (14) by using a sealing assembly.

8. The adjustment method of a submersible mixer resonance control device according to claim 7, characterized in that: The rotation range of the eccentric wheel (24) is between 0-90°.

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