Centrifugal pump for marine with active vibration and noise reduction function

Abstract

The application discloses a marine centrifugal pump with active vibration reduction and noise reduction functions, and relates to the field of centrifugal pumps.The centrifugal pump comprises a pump body, the pump body is rotationally connected with a pump shaft, a monitoring assembly for monitoring dynamic balance of the pump shaft is arranged on the pump shaft, a rotating frame is fixedly connected to the pump shaft, rotating boxes are arranged in an annular interval on the rotating frame, a balance assembly for correcting dynamic balance of the pump shaft is arranged in the rotating boxes, a fixing frame is coaxially arranged with the rotating frame, and an adjusting mechanism for increasing or decreasing the balance assembly in a target rotating box is arranged on the fixing frame in the direction of the rotating frame.The rotating frame is arranged on the pump shaft, the rotating boxes are arranged in an annular interval on the rotating frame, the dynamic balance of the pump body during continuous work is maintained by increasing or decreasing steel balls in the rotating boxes, thereby effectively reducing vibration and noise caused by rotation of a rotor component, real-time response to vibration characteristics under complex working conditions is realized, and vibration reduction and noise reduction effects are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of centrifugal pumps, in particular to a marine centrifugal pump with active vibration reduction and noise reduction function. BACKGROUND

[0002] The centrifugal pump is a key liquid conveying equipment in marine machinery. Its basic working principle is that liquid flows into the high-speed rotating impeller of the marine pump through the pipeline, so that the liquid is subjected to inertial centrifugal force and flies away from the impeller, and then enters the pipeline, thereby realizing the pressurized conveying of the liquid. It is mainly applied to ships with high acoustic stealth performance requirements, and provides power, fire fighting, cooling, drainage, life service and safety protection for ships, as well as water support for special systems such as ship balancing system and spraying system. The performance of the product directly affects the attitude balance and acoustic stealth performance of the ship.

[0003] During the operation of the traditional marine centrifugal pump, different degrees of vibration will be generated with the rotation of the rotor part, causing pressure pulsation of the water flow, leading to pipeline coupled vibration and inducing noise. Therefore, in the harsh marine environment such as sea waves, strong winds, and ship body tilting, the water supply system is more likely to cause component damage due to resonance, which will have a great impact on the ship navigation. At the same time, noise also seriously affects the living environment and health of the crew, not only affecting the stable operation of the ship equipment, but also adversely affecting the acoustic stealth performance of the ship.

[0004] In order to solve the above problems, passive vibration reduction and noise reduction measures are often used in the prior art, such as installing rubber damping pads between the pump body and the ship body or wrapping the pump body with sound insulation materials. Although these methods can reduce vibration and noise to some extent, they often fail to achieve the desired vibration reduction and noise reduction effect due to their inability to respond to complex and variable vibration characteristics in real time. In addition, the rubber damping pads are prone to aging and failure during long-term use, and the sound insulation materials may also have reduced performance due to changes in environmental humidity and temperature, further affecting the vibration stability.

[0005] In summary, the existing marine centrifugal pumps mostly use passive vibration reduction measures, which are difficult to meet the use requirements of the ship under complex working conditions. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a marine centrifugal pump with active vibration reduction and noise reduction function, to solve the technical problem that the existing marine centrifugal pumps mostly use passive vibration reduction measures, which are difficult to meet the use requirements of the ship under complex working conditions.

[0007] To achieve the above object, the present application provides the following technical scheme: a marine centrifugal pump with active vibration and noise reduction function, comprising a pump body, the pump body is rotationally connected with a pump shaft, and a monitoring assembly for monitoring dynamic balance of the pump shaft is installed on the pump shaft, further comprising a rotating frame, the rotating frame is fixedly connected to the pump shaft, and rotating boxes are annularly and spacedly installed, the rotating boxes contain balance assemblies for correcting dynamic balance of the pump shaft, further comprising a fixed frame, the fixed frame is coaxially arranged with the rotating frame, and the fixed frame is provided with an adjusting mechanism for increasing or decreasing the balance assemblies in the target rotating box in the direction of the rotating frame.

[0008] By adopting the above technical scheme, the rotating frame is installed on the pump shaft, and the rotating boxes are annularly and spacedly arranged on the rotating frame, the dynamic balance of the pump body during continuous operation is maintained by actively increasing or decreasing the steel balls in the rotating boxes, thereby effectively reducing the vibration and noise caused by rotation of the rotor part, realizing real-time response to vibration characteristics under complex working conditions, improving the vibration and noise reduction effect, prolonging the service life of the equipment, ensuring stable operation of the ship water supply system, improving the working and living environment of the crew, and improving the acoustic stealth performance of the ship.

[0009] The present application is further provided that the rotating boxes are provided with first channels and third channels at different heights along the radial direction of the pump shaft, one end of the first channels and the third channels close to the pump shaft is connected by a vertical second channel, and the other end is respectively provided with a first opening and a second opening, the first channel, the second channel and the third channel are used for moving the steel balls and can accommodate the steel balls.

[0010] As a preferred, the steel ball is used as the balance assembly, which is convenient to adjust the position of the steel ball in the rotating box, and the advantages of light weight and small inertia of the steel ball are used to make the balance adjustment more sensitive and efficient.

[0011] The present application is further provided that the fixed frame is provided with an annular part at the height corresponding to the first channel and the third channel, the rotating box is provided with a slot in the direction of the second channel towards the pump shaft, the width of the slot is smaller than the diameter of the steel ball, and a part of the steel ball can extend out of the rotating box through the slot when moving along the second channel, and the top end of the pump body is fixedly connected with an inclined table for moving the steel ball upward along the second channel.

[0012] As a preferred, the annular part of the fixed frame can prevent the steel ball in the rotating box from being thrown out, and the inclined table can contact the steel ball and push the steel ball to move upward along the corresponding second channel under the relative movement with the rotating frame.

[0013] The application is further provided with a rotating disc rotatably connected to the fixed frame on the annular portion corresponding to the third channel, the axis of the rotating disc is arranged along the radial direction of the pump shaft, and the height of the axis of the rotating disc is higher than the height of the third channel, the entering hole for the steel balls to enter the interior of the rotating disc is arranged on the direction of the third channel, the side wall of the rotating disc is provided with the discharging hole for discharging the steel balls, and the falling hole corresponding to the discharging hole is arranged on the fixed frame in the vertical direction.

[0014] Preferably, the entering hole is at the height of the third channel by adjusting the rotating angle of the rotating disc, and the second through hole of the rotating box is located in the third channel, so that the steel balls in the third channel can smoothly enter the rotating disc under the action of the centrifugal force when the rotating disc is rotated to align with the entering hole.

[0015] The application is further provided with a storage box fixedly installed on the fixed frame, the fourth through hole is arranged on the top end of the storage box in the direction of the falling hole, the third through hole is arranged at the height of the first through hole, the rotating ring is arranged on the rotating frame at the position corresponding to the third through hole, and the push column for pushing the steel balls into the rotating box is arranged on the bottom end of the storage box.

[0016] Preferably, the storage box is used for storing the steel balls to be added into the rotating box.

[0017] The application is further provided with the same width of the rotating disc and the diameter of the steel ball, the bottom end of the storage box is at the height of the first channel and only one steel ball exists at the same time, the stroke of the push column is the same as the diameter of the steel ball, when the first channel is filled with the steel balls, the steel balls close to the pump shaft will extend out of the rotating box through the slot, and when the push column pushes one steel ball into the first channel, the first channel is in the state of being filled with the steel balls.

[0018] Preferably, the single-time excessive steel balls are prevented from entering the rotating disc to cause blockage, and the weight of the single steel ball is adjusted to facilitate the accurate control of the overall weight of the rotating box.

[0019] The application is further provided with the hollow structure of the push column, the air hole is arranged on the first end of the push column in the direction of the steel ball, the air chamber is arranged on the bottom of the storage box close to the tail end of the push column, the air interface leading to the air chamber is arranged on the storage box, and the compression spring for resetting the push column is arranged between the tail end of the push column and the inner wall of the storage box.

[0020] Preferably, the extension of the push column is controlled by the pneumatic mode.

[0021] The application is further provided with the magnetic block arranged on the inclined surface of the inclined table for attracting the steel balls, and the magnetic block does not contact the steel balls.

[0022] Preferably, the stability of the rising process of the steel balls is further improved.

[0023] The pump body is mounted on a fixed table, and the edge of the fixed table is mounted on a support frame through a damping seat.

[0024] As preferred, the damping seat can further reduce the vibration generated by the operation of the pump body, and also prevent external vibration transmitted to the pump body by the support frame, thereby ensuring the stable operation and long service life of the equipment under complex working conditions.

[0025] The top end of the pump body is coaxially fixedly mounted with a protective cylinder, the fixed frame is fixedly connected to the inner wall of the protective cylinder, the height of the top end of the protective cylinder is higher than the top end of the rotating frame, and the top end of the protective cylinder is fixedly connected with a top cover.

[0026] As preferred, the protective cylinder is used to protect the rotating frame from external environmental interference during the operation of the pump body, and to prevent foreign matter from falling into the interior of the rotating frame to affect the operation of the equipment, and the setting of the top cover further enhances the sealing and stability of the overall structure.

[0027] In summary, the present application mainly has the following beneficial effects:

[0028] The present application installs a rotating frame on the pump shaft, and arranges rotating boxes in a ring shape on the rotating frame, and uses the method of actively increasing and decreasing the steel balls in the rotating boxes to maintain the dynamic balance of the pump body during continuous operation, thereby effectively reducing the vibration and noise caused by the rotation of the rotor parts, realizing real-time response to the vibration characteristics under complex working conditions, improving the vibration reduction and noise reduction effect, prolonging the service life of the equipment, ensuring the stable operation of the ship water supply system, improving the working and living environment of the crew, and improving the acoustic stealth performance of the ship.

[0029] The present application installs a rotating disc on the fixed frame, controls the intermittent rotation of the rotating disc, and realizes the discharge of the steel balls in the target rotating box by combining the centrifugal force received by the steel balls when the rotating frame rotates, thereby reducing the weight of the target rotating box to adjust the dynamic balance of the whole rotating frame.

[0030] The present application sets a push column mechanism at the bottom end of the storage box, and when the target rotating box is about to pass through the storage box, the steel ball is pushed to the rotating ring by the extension and retraction movement of the push column, and when the first through hole at the bottom end of the target rotating box is aligned with the steel ball, the steel ball is pushed into the rotating box, thereby achieving the feeding of the steel ball in the target rotating box, increasing the weight of the target rotating box, and adjusting the dynamic balance of the whole rotating frame.

[0031] The application sets a slot in vertical direction on the side of the rotating box close to the pump shaft, and sets a second channel for steel ball transfer in vertical direction in the rotating box, uses the rotating box to cooperate with the inclined table fixedly connected to the top end of the pump body, makes the inclined table push the steel ball extending out of the slot to move up to the height of the second channel, facilitates the steel ball to be discharged from the rotating box, and also makes the steel ball move to the position with larger rotating radius, so that the dynamic balance of the rotating frame is further adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a perspective view of the application;

[0033] Figure 2 It is a perspective view of the application with the top cover removed;

[0034] Figure 3 It is a sectional view of the fixed frame and the rotating frame, and a schematic view of the internal structure of the protective cylinder;

[0035] Figure 4 It is a perspective view of the application; Figure 3 It is an enlarged view of A in the application;

[0036] Figure 5 It is a sectional view of the fixed frame, the rotating frame and the storage box, and a schematic view of the internal structure of the protective cylinder;

[0037] Figure 6 It is a perspective view of the application; Figure 5 It is an enlarged view of B in the application;

[0038] Figure 7 It is a perspective view of the application; Figure 5 It is an enlarged view of C in the application;

[0039] Figure 8 It is a schematic view of the internal structure of the protective cylinder with the fixed frame removed;

[0040] Figure 9 It is a perspective view of the application; Figure 8 It is an enlarged view of D in the application;

[0041] Figure 10 It is a perspective view of the fixed frame;

[0042] Figure 11 It is a perspective view of the application; Figure 10 It is an enlarged view of E in the application;

[0043] Figure 12 It is a schematic view of the state that the inclined table pushes the steel ball in the rotating box;

[0044] Figure 13 It is a perspective view of the application; Figure 12 It is an enlarged view of F in the application;

[0045] Figure 14 Fig. 1 is a schematic diagram of the internal structure of the storage box of the present application;

[0046] Figure 15 Fig. 2 is a schematic diagram of the internal structure of the rotating disc of the present application.

[0047] Legend of reference signs:

[0048] 1, pump body; 2, pump shaft; 3, rotating frame; 301, rotating ring; 4, fixed frame; 401, falling hole; 5, mounting frame; 501, inductor; 6, inclined table; 601, magnetic block; 7, rotating box; 701, first channel; 702, second channel; 703, third channel; 704, slot; 705, first through hole; 706, second through hole; 8, rotating disc; 801, inlet hole; 802, outlet hole; 9, storage box; 901, air connection; 902, air chamber; 903, third through hole; 904, fourth through hole; 10, push column; 11, compression spring; 12, steel ball; 13, protective cylinder; 14, top cover; 15, fixed table; 16, damping seat; 17, support frame. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0050] The embodiments of the present application will be described below according to the overall structure of the present application.

[0051] First embodiment:

[0052] A marine centrifugal pump with active damping and noise reduction function, please refer to Figures 1-15 , comprising a pump body 1, the pump body 1 is a vertical centrifugal pump, the pump body 1 is rotatably connected with a vertical upward pump shaft 2, and a monitoring assembly for monitoring the dynamic balance of the pump shaft 2 is installed on the pump shaft 2, and the top end of the pump shaft 2 can be connected to a driving motor or other power source capable of driving the pump shaft 2 to rotate stably through a shaft coupling.

[0053] Specifically, in the present embodiment, the top end of the pump body 1 is fixedly connected with a mounting frame 5, and the center of the mounting frame 5 is installed with an inductor 501 coaxial with the pump shaft 2, which is used to monitor the vibration of the pump shaft 2 in real time, and the inductor 501 specifically adopts an acceleration sensing device in the dynamic balancing machine in the prior art, and the present application does not improve the inductor 501, and the working principle thereof will not be described here.

[0054] Further comprising a rotating frame 3, the rotating frame 3 is fixedly connected to the pump shaft 2, and the rotating frame 3 is annularly and spacedly provided with rotating boxes 7, specifically, the rotating boxes 7 are provided along the annular surface at equal intervals, after the rotating boxes 7 are installed on the rotating frame 3, the rotating boxes 7 need to be first detected for dynamic balance and qualified, and then can be connected to the pump shaft 2, the rotating boxes 7 contain balance assemblies for correcting the dynamic balance of the pump shaft 2, specifically, in the embodiment, the balance assemblies specifically adopt steel balls 12.

[0055] Further comprising a fixed frame 4, the fixed frame 4 is coaxially provided with the rotating frame 3, and the fixed frame 4 is provided with an adjusting mechanism for increasing or decreasing the balance assemblies in the target rotating box 7 in the direction towards the rotating frame 3.

[0056] Specifically, the fixed frame 4 is fixedly connected to the inner wall of the protective cylinder 13, the height of the top end of the protective cylinder 13 is higher than the top end of the rotating frame 3, the top end of the protective cylinder 13 is fixedly connected with a top cover 14, the protective cylinder 13 is used for protecting the rotating frame 3 from external environment interference when the pump body 1 works, and preventing sundries from falling into the rotating frame 3 to affect the equipment operation, and the setting of the top cover 14 further enhances the sealing performance and stability of the overall structure.

[0057] Further, the pump body 1 is installed on a fixed table 15, the edge of the fixed table 15 is installed on a support frame 17 through a damping seat 16, the damping seat 16 specifically adopts a damping spring damping seat, the damping seat 16 can further reduce the vibration generated by the pump body 1 working, and also can prevent external vibration transmitted to the pump body 1 from the support frame 17, so as to protect the stable operation and long service life of the equipment under complex working conditions, and the top end of the pump body 1 is coaxially and fixedly installed with the protective cylinder 13.

[0058] In the above embodiment, specifically, please refer to Figures 5-9 , the rotating box 7 is provided with a first channel 701 and a third channel 703 at different heights along the radial direction of the pump shaft 2, specifically, the height of the first channel 701 is lower than the height of the third channel 703, and the length is also shorter than the third channel 703, so as to facilitate the storage of the steel balls 12 in the third channel 703, one end of the first channel 701 and the third channel 703 is connected through a vertical second channel 702, and the other end is respectively provided with a first through port 705 and a second through port 706, the first through port 705 and the second through port 706 can smoothly pass the steel balls 12.

[0059] Specifically, the first channel 701, the second channel 702 and the third channel 703 are used for moving and accommodating the steel balls 12, and the steel balls 12 are used as the balance assemblies, which is convenient to adjust the position of the steel balls 12 in the rotating box 7, and the single weight of the steel balls 12 is light and the inertia is small, so that the balance adjustment is more sensitive and efficient.

[0060] In the above embodiment, specifically, please refer to Figures 5-11, the fixing frame 4 is provided with an annular portion corresponding to the height of the first channel 701 and the third channel 703, specifically, the fixing frame 4 does not contact the rotating frame 3, the rotating box 7 is provided with a slot 704 in the direction of the second channel 702 towards the pump shaft 2, the slot 704 is also in a vertical state, the width of the slot 704 is smaller than the diameter of the steel ball 12, so as to avoid the steel ball 12 directly leaving the rotating box 7 through the slot 704, and when the steel ball 12 moves along the second channel 702, a part of the steel ball 12 can extend out of the rotating box 7 through the slot 704.

[0061] Further, the top end of the pump body 1 is fixedly connected with an inclined table 6 for moving the steel ball 12 upwards along the second channel 702, specifically, the inclined table 6 is in a circular arc structure in the top view, and the radius is smaller than the minimum radius of the movement of the rotating box 7, so that the inclined table 6 does not collide with the rotating box 7 or the rotating frame 3, and the annular portion of the fixing frame 4 can prevent the steel ball 12 in the rotating box 7 from being thrown out, and under the relative movement of the inclined table 6 and the rotating frame 3, the inclined table 6 can contact the steel ball 12 and push the steel ball 12 to move upwards along the corresponding second channel 702.

[0062] Further, the inclined table 6 is installed near the storage box 9, after the steel ball 12 is supplemented into the rotating box 7, the steel ball 12 extending out of the slot 704 can quickly contact the inclined table 6, so that in the process of continuous rotation of the rotating frame 3, the steel ball 12 can slide along the surface of the inclined table 6 and be smoothly pushed to move upwards along the second channel 702.

[0063] In the above embodiment, specifically, please refer to Figures 5-7 , Figure 15 , the fixing frame 4 is rotatably connected with a rotating disc 8 on the annular portion corresponding to the third channel 703, the axis of the rotating disc 8 is arranged in the radial direction of the pump shaft 2, and the height of the axis of the rotating disc 8 is higher than the height of the third channel 703, the rotating disc 8 is provided with an entering hole 801 for the steel ball 12 to enter the inside of the rotating disc 8 in the direction of the third channel 703, and the side wall of the rotating disc 8 is provided with an outlet hole 802 for discharging the steel ball 12, specifically, the outlet hole 802 is arranged on the annular surface and spaced apart from the entering hole 801 by one hundred and eighty degrees, when the outlet hole 802 faces upward, the entering hole 801 is aligned with the height of the third channel 703.

[0064] Further, the fixing frame 4 is provided with a falling hole 401 corresponding to the outlet hole 802 in the vertical direction, by adjusting the rotation angle of the rotating disc 8 to make the entering hole 801 at the height of the third channel 703, and further make the second port 706 of the rotating box 7 located in the third channel 703, the steel ball 12 in the third channel 703 can smoothly enter the rotating disc 8 under the action of centrifugal force when the rotating box 7 is rotated to align with the entering hole 801.

[0065] In the above embodiment, specifically, please refer to Figures 5-7 ,Figure 14 The fixed frame 4 is fixedly provided with a storage box 9, the inside of the storage box 9 is provided with a slope for the steel ball 12 to roll to the bottom end of the storage box 9, the top end of the storage box 9 is provided with a fourth opening 904 facing the falling hole 401, and a third opening 903 is arranged at the height of the first opening 705.

[0066] Further, the rotating frame 3 is provided with a rotating ring 301 at the position corresponding to the third opening 903, specifically, the width of the rotating ring 301 is greater than the height of the third opening 903, so as to avoid the steel ball 12 in the storage box 9 from directly leaving the storage box 9 after rolling, and the bottom end of the storage box 9 is provided with a push column 10 for pushing the steel ball 12 into the rotating box 7, and the storage box 9 is used for storing the steel ball 12 to be added into the rotating box 7.

[0067] Second embodiment:

[0068] A marine centrifugal pump with active vibration and noise reduction function, please refer to Figures 1-15 On the basis of the first embodiment, the difference from the first embodiment is that the width of the rotating disc 8 is the same as the diameter of the steel ball 12, and after the steel ball 12 is thrown into the rotating disc 8 by the centrifugal force, it will block the subsequent steel ball 12 from entering, so as to ensure that only one steel ball 12 enters the rotating disc 8 each time, and facilitate accurate control of the number of steel balls 12 discharged from the rotating box 7.

[0069] Further, there is only one steel ball 12 at the height of the first channel 701 at the bottom end of the storage box 9, the stroke of the push column 10 is the same as the diameter of the steel ball 12, and when the first channel 701 is full of steel balls 12, the steel ball 12 close to the pump shaft 2 will extend out of the rotating box 7 through the slot 704, and when the push column 10 pushes one steel ball 12 into the first channel 701, the first channel 701 is in a state of being full of steel balls 12, avoiding too many steel balls 12 entering the rotating disc 8 at the same time, and adjusting the weight of one steel ball 12 at a time also facilitates accurate control of the overall weight of the rotating box 7.

[0070] Further, in order to make the steel balls in the third channel 703 be thrown into the corresponding entering hole 801 more smoothly, and then enter the rotating disc 8, the annular part of the fixed frame 4 is provided with a guide slope at the position close to the rotating disc 8, which can make the steel ball 12 roll more smoothly under the action of centrifugal force and accurately enter the rotating disc 8, effectively avoiding the situation that the second opening 706 and the entering hole 801 meet for a short time and cannot enter the rotating disc 8.

[0071] In the above embodiments, specifically, please refer to Figures 3-7 , Figure 14The push column 10 is a hollow structure, and a vent hole is arranged at the first end of the push column 10 and faces the steel ball 12. The bottom of the storage box 9 is provided with a gas chamber 902 close to the tail end of the push column 10, and the end of the push column 10 facing the gas chamber 902 is open. When the push column 10 is reset by the elastic force of the compression spring 11, the push column 10 and the gas in the gas chamber 902 are discharged through the vent hole, so that the push column 10 can be reset smoothly.

[0072] Further, the storage box 9 is provided with a gas interface 901 connected to the gas chamber 902, and a compression spring 11 is arranged between the tail end of the push column 10 and the inner wall of the storage box 9 to reset the push column 10. The extension of the push column 10 is controlled in a pneumatic manner. Specifically, the gas interface 901 is connected with a high-pressure gas source through a gas guide pipe.

[0073] Specifically, in the embodiment, the high-pressure gas source is a combination of a compressor and a gas storage tank. The high-pressure gas source is a common prior art in the prior art, and the application will not be described here. The high-pressure gas source is discharged when the push column 10 needs to extend. After the high-pressure gas enters the gas chamber 902, the push column 10 moves and further realizes the pushing of the steel ball 12 into the first channel 701 of the target rotating box 7. The push column 10 compresses the compression spring 11 during the extension, so that the spring 11 accumulates elastic potential energy, and does not interfere with the rotating frame 3. In other unpublished embodiments, other ways such as hydraulic driving can be used to control the movement of the push column 10, but the speed of the push column 10 may not be as fast as the pneumatic method.

[0074] In the above embodiment, specifically referring to Figures 5-7 、 Figures 12-13 The inclined table 6 is spaced apart along the inclined surface thereof and is provided with a magnetic block 601 for attracting the steel ball 12. The magnetic block 601 can attract the steel ball 12 by magnetic force. When the steel ball 12 is temporarily separated from the inclined table 6 due to the vibration of the pump shaft 2, the magnetic block 601 can ensure that the steel ball 12 continues to move smoothly along the second channel 702 by the magnetic attraction force, and the magnetic block 601 does not contact the steel ball 12 during the movement, so that the steel ball 12 does not collide with the magnetic block 601 and the magnetic block 601 is not knocked off, thereby further improving the stability of the steel ball 12 during the rising process.

[0075] When the application works:

[0076] The pump shaft 2 is driven by the driving motor to rotate, and the rotating frame 3 fixedly connected with the pump shaft 2 rotates synchronously. The steel balls 12 in the first channel 701 and the third channel 703 in the rotating box 7 slide away from the pump shaft 2 direction under the action of centrifugal force, and the steel balls 12 farthest from the pump shaft 2 contact the annular part of the fixed frame 4.

[0077] In the process of rotating the rotating frame 3, when the steel ball 12 in the third channel 703 passes the rotating disc 8, since the entry hole 801 of the rotating disc 8 is not rotated to the same height as the third channel 703, the steel ball 12 cannot enter the rotating disc 8 through the entry hole 801. When the steel ball 12 in the first channel 701 passes the bottom end position of the storage box 9, since there is a steel ball 12 at the same height position of the bottom end of the storage box 9 and the first channel 701, and the edge of the steel ball 12 is flush with the edge of the annular portion of the fixed frame 4, the steel ball 12 cannot enter the storage box 9 from the bottom end of the storage box 9.

[0078] The pump body 1 maintains operation, and the vibration generated by the pump shaft 2 is monitored by the inductor 501 to determine the position where the weight needs to be increased or decreased. The rotating encoder assembly located on the rotating frame 3 and the fixed frame 4 operates to increase or decrease the steel balls 12 in the rotating box 7 at the position.

[0079] Specifically, when the target rotating box 7 needs to be lightened, the rotating box 7 will be aligned with the rotating disc 8, the rotating disc 8 rotates half a circle to make the entry hole 801 at the same height as the third channel 703, the steel ball 12 in the third channel 703 in the rotating box 7 is affected by the centrifugal force, and when the second opening 706 is aligned with the entry hole 801, the steel ball 12 farthest from the pump shaft 2 enters the rotating disc 8, realizing the discharge of the balancing assembly in the rotating box 7, thereby reducing the weight of the rotating box 7. With the continuous rotation of the rotating frame 3, the target rotating box 7 is misaligned with the rotating disc 8, and at the same time, the rotating disc 8 rotates half a circle to reset, avoiding the entry of the steel balls 12 in other rotating boxes 7 into the rotating disc 8. After the rotating disc 8 is reset, the discharge hole 802 is directed towards the falling hole 401, and the steel ball 12 in the rotating disc 8 falls through the falling hole 401 under the action of its own gravity and enters the storage box 9.

[0080] When the target rotating box 7 needs to increase the weight, the to-be-rotating box 7 will be aligned with the bottom end of the storage box 9, the high-pressure gas source passes through the gas pipeline and the gas interface 901 to the gas chamber 902, pushes the push column 10 to extend, pushes the steel ball 12 at the bottom end of the storage box 9 to the rotating ring 301, so that it is in close contact with the surface of the rotating ring 301, and as the rotating frame 3 continues to rotate, when the first through port 705 of the target rotating box 7 is aligned with the steel ball 12, the steel ball 12 is pushed into the first channel 701 of the target rotating box 7, the steel balls 12 in the first channel 701 push each other, and the steel ball 12 closest to the pump shaft 2 is pushed to the state of extending out of the slot 704, because the rotating frame 3 is in a rotating state relative to the inclined table 6, the steel ball 12 extending out of the slot 704 can contact the edge portion of the inclined table 6 and move relative to the inclined table 6 in the process of rotating the rotating frame 3, so as to smoothly rise along the second channel 702 to the height of the third channel 703, when the steel ball 12 moves to the height position of the third channel 703, it can slide away from the pump shaft 2 along the third channel 703 under the action of centrifugal force, thereby achieving the weight increase of the target rotating box 7.

[0081] The number of steel balls 12 in the target rotating box 7 is increased or decreased to adjust the weight of each position of the rotating frame 3, so as to achieve the purpose of dynamic balance of the rotor part of the pump body 1, so that the rotating frame can actively adapt to the actual demand during operation, and ensure the stability and safety of the equipment operation.

[0082] Although the embodiments of the present application have been shown and described, the specific embodiments are only an explanation of the present application, and are not a limitation of the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A marine centrifugal pump having an active vibration and noise reduction function, characterized by, The utility model relates to a pump body (1) is provided with the pump shaft (2) of rotation connection, and the monitoring assembly for monitoring the dynamic balance of pump shaft (2) is installed on pump shaft (2), the utility model relates to a rotating frame (3) is fixedly connected to pump shaft (2), and the rotating box (7) of annular interval installation is arranged, and the balance assembly for correcting the dynamic balance of pump shaft (2) is contained in rotating box (7), the utility model relates to a fixed frame (4) is coaxially arranged with rotating frame (3), and the adjusting mechanism for increasing and reducing the balance assembly in target rotating box (7) is arranged to the direction of rotating frame (3) of fixed frame (4), and the first channel (701) and third channel (703) are arranged at different heights along the radial direction of pump shaft (2) in rotating box (7), one end of first channel (701) and third channel (703) is communicated through the vertical second channel (702) close to pump shaft (2), and the other end is provided with first pass (705) and second pass (706) respectively, first channel (701), second channel (702), third channel (703) are used for the movement of steel ball (12), and can accommodate steel ball (12), the annular part is arranged to the height of corresponding first channel (701) and third channel (703) of fixed frame (4), the slot (704) is opened to the direction of second channel (702) of rotating box (7) towards pump shaft (2), the width of slot (704) is less than the diameter of steel ball (12), when steel ball (12) moves along second channel (702), a part can be stretched out rotating box (7) through slot (704), the top of pump body (1) is fixedly connected with inclined table (6) for making steel ball (12) move upwards along second channel (702). The utility model relates to a rotating disc (8) of rotation connection on the annular part of corresponding third channel (703) of fixed frame (4), the axis of rotating disc (8) is arranged along the radial direction of pump shaft (2), and the height of the axis of rotating disc (8) is higher than the height of third channel (703), the entering hole (801) for entering steel ball (12) into the inside of rotating disc (8) is arranged to the direction of third channel (703) of rotating disc (8), the side wall of rotating disc (8) is provided with the discharge hole (802) for discharging steel ball (12), the falling hole (401) corresponding with discharge hole (802) can be arranged on the vertical direction of fixed frame (4). The utility model relates to a storage box (9) of fixed installation on fixed frame (4), the fourth pass (904) is arranged to the falling hole (401) of top of storage box (9), and the third pass (903) is arranged to the height of first pass (705), the rotating ring (301) is arranged to the position of corresponding third pass (903) of rotating frame (3), the push column (10) for pushing steel ball (12) into rotating box (7) is arranged to the bottom of storage box (9). ​ 2. The marine centrifugal pump with active vibration and noise reduction function according to claim 1, characterized in that: ​ 3. The marine centrifugal pump with active vibration and noise reduction function according to claim 2, characterized in that: ​ 4. The marine centrifugal pump with active vibration and noise reduction function according to claim 3, characterized in that: The width in the rotating disc (8) is same as the diameter of the steel ball (12), the bottom end of the storage box (9) is at the same height as the first channel (701) only exists a steel ball (12), the stroke of the push column (10) is same as the diameter of the steel ball (12), when the first channel (701) is full of the steel ball (12), the steel ball (12) near the pump shaft (2) will extend out of the rotating box (7) through the slot (704), when the push column (10) pushes a steel ball (12) into the first channel (701), the first channel (701) is full of the steel ball (12).

5. The marine centrifugal pump with active vibration and noise reduction function according to claim 3, characterized in that: The push column (10) is hollow structure, and the first end is provided with a vent hole towards the steel ball (12), the bottom of the storage box (9) is provided with an air chamber (902) near the tail end of the push column (10), the storage box (9) is provided with an air interface (901) leading to the air chamber (902), the tail end of the push column (10) and the inner wall of the storage box (9) are provided with a compression spring (11) for resetting the push column (10).

6. The marine centrifugal pump with active vibration and noise reduction function according to claim 1, characterized in that: The inclined table (6) is provided with a magnetic block (601) for attracting the steel ball (12) along the inclined surface.

7. The marine centrifugal pump with active vibration and noise reduction function according to claim 1, characterized in that: The pump body (1) is installed on the fixed table (15), the edge of the fixed table (15) is installed on the support frame (17) through the damping seat (16).

8. The marine centrifugal pump with active vibration and noise reduction function according to claim 1, characterized in that: The top end of the pump body (1) is coaxially fixedly installed with the protection cylinder (13), the fixed frame (4) is fixedly connected to the inner wall of the protection cylinder (13), the height of the top end of the protection cylinder (13) is higher than the top end of the rotating frame (3), the top end of the protection cylinder (13) is fixedly connected with the top cover (14).

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