Centrifugal pump with anti-abrasion function for ship

Abstract

The invention discloses a marine centrifugal pump with an anti-wear function, the centrifugal pump comprises a bottom plate, a first motor, a coupler, a first ring frame, a centrifugal mechanism, a second ring frame and a kinetic energy recovery mechanism, the first motor, the first ring frame, the second ring frame and the kinetic energy recovery mechanism are fixedly connected with the bottom plate, and the output end of the first motor is in transmission connection with the coupler; the coupler is fixedly connected with the first ring frame and is in transmission connection with the centrifugal mechanism, and the centrifugal mechanism is fixedly connected with the second ring frame and is in contact with the kinetic energy recovery mechanism; the invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump capable of screening part of large-size impurities in liquid, ensuring that parts in a pump body cannot be collided and abraded, offsetting axial impact kinetic energy generated by rotating high-speed liquid through polarization compensation, ensuring that components such as an impeller cannot be rapidly abraded, and improving the working efficiency. The rotating kinetic energy of part of liquid can be recovered through the braking belt ring, and the utilization efficiency of energy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with anti-wear function for ships. Background Art

[0002] Marine centrifugal pump is a centrifugal pump specially designed for use on ships. It is mainly used for extracting, conveying and pressurizing liquids, such as seawater, fresh water, fuel oil, etc. The basic structure of marine centrifugal pump includes impeller, pump shaft, pump casing, pump seat, shaft seal device, bearing seat and other main components. Among them, the impeller is the core component of the centrifugal pump. Relying on the high-speed rotation of the impeller, the fluid obtains greater kinetic energy, and relies on the change of the volute section at the flow channel to convert the kinetic energy of the fluid into pressure energy. The flow of water in the impeller is mainly affected by centrifugal force, thereby realizing the continuous delivery of liquid.

[0003] During the operation of the centrifugal pump, since the liquid enters the impeller at low pressure and flows out at high pressure, the pressures on both sides of the impeller are unequal, generating an axial thrust pointing toward the inlet, which will cause the rotor to move axially, resulting in wear and vibration; at the same time, since the pumped liquid is not filtered, some hard particles and impurities in the liquid are directly pumped into the centrifugal pump, causing wear on the components inside the pump; when the ship is on the ocean, it is necessary to reasonably allocate the use of energy, and the purpose of energy saving can be achieved by recovering part of the kinetic energy of the centrifugal pump. Summary of the invention

[0004] The object of the present invention is to provide a centrifugal pump with anti-wear function for ships to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A centrifugal pump with anti-wear function for ships comprises a base plate, a first motor, a coupling, a first ring frame, a centrifugal mechanism, a second ring frame and a kinetic energy recovery mechanism. The first motor, the first ring frame, the second ring frame and the kinetic energy recovery mechanism are all fixedly connected to the base plate, the output end of the first motor is transmission-connected to the coupling, the coupling is fixedly connected to the first ring frame, the coupling is transmission-connected to the centrifugal mechanism, the centrifugal mechanism is fixedly connected to the second ring frame, and the centrifugal mechanism is in contact with the kinetic energy recovery mechanism.

[0006] The present invention is an energy-saving centrifugal pump used on ships. The first motor outputs a fixed-axis torque to a coupling, and the coupling transmits the torque to a centrifugal mechanism. The wheel group inside the centrifugal mechanism receives the torque. Relying on the high-speed rotation of the wheel group, the fluid obtains greater kinetic energy, and the kinetic energy of the fluid is converted into pressure energy by relying on the change of the volute cross-section at the flow channel. The flow of water in the centrifugal mechanism is mainly affected by the centrifugal force, thereby realizing continuous transportation of the liquid. After the extraction and transportation of the fluid is completed, the kinetic energy recovery mechanism contacts the centrifugal mechanism, and a part of the kinetic energy of the torque output by the first motor is recovered through the kinetic energy recovery mechanism to generate electricity, thereby achieving the effect of energy saving.

[0007] Furthermore, the centrifugal mechanism includes a pump casing, a first bearing frame, a main shaft, a screening mechanism, an impeller mechanism, a passage mechanism, a volute tube and a belt ring. The pump casing is fixedly connected to the first bearing frame, the volute tube and the second ring frame. The pump casing is provided with a main hole, a water inlet and an annular groove. The main shaft is rotatably connected to the main hole and the first bearing frame. The main shaft is transmission-connected to the coupling. The impeller mechanism is fixedly connected to the main shaft. The screening mechanism is fixedly connected to the main shaft, the water inlet and the passage mechanism. The belt ring is slidably connected to the annular groove, and the belt ring is in contact with the kinetic energy recovery mechanism.

[0008] The coupling transmits torque to the main shaft, and the main shaft ensures the fixed axis rotation in the first bearing frame. The main shaft drives the screening mechanism to rotate, generating suction to draw external liquid in through the water inlet. The liquid rotates at high speed through the central flow channel of the screening mechanism and is thrown around. Large-volume impurities in the liquid are screened to avoid wear on the subsequent impeller mechanism. Since the liquid enters the screening mechanism under low pressure, after being thrown out of the side wall, high pressure is formed on the side of the screening mechanism away from the water inlet, so that the pressure on both sides of the screening mechanism is unequal, and an axial thrust pointing to the inlet is generated. The axial thrust is offset by the structure of the screening mechanism itself to avoid axial movement of the screening mechanism, causing wear and vibration of the main shaft. The fluid thrown out of the screening mechanism is subjected to increased centrifugal force under the action of the impeller mechanism, and the liquid is pumped out along the volute tube. At the same time, the high-speed rotating liquid drives the belt ring to rotate, and the belt ring contacts the kinetic energy recovery mechanism to recover part of the kinetic energy of the fluid. After the pumping is completed, the passage mechanism is switched to discharge the large-volume impurities filtered in the screening mechanism.

[0009] Furthermore, the screening mechanism includes an assembly pipe, a screening wheel, an assembly table, and a compensation mechanism. The assembly pipe is fixedly connected to the water inlet and the passage mechanism, the assembly pipe is rotatably connected to the screening wheel, the assembly table is fixedly connected to the screening wheel and the compensation mechanism, the compensation mechanism is fixedly connected to the main shaft, and the screening wheel is provided with a first through hole and fan blades. The first through holes and the fan blades are provided in several groups, and the several groups of first through holes are evenly distributed along the circumference of the side wall of the screening wheel, and the several groups of fan blades are evenly distributed along the circumference of the inner wall of the screening wheel.

[0010] The main shaft drives the screening wheel to rotate, and the screening wheel rotates clockwise at a high speed in the specified direction. Since the fan blades arranged clockwise on the inner wall of the screening wheel disturb the airflow to generate strong suction, the external liquid is drawn into the central flow channel of the screening wheel through the assembly pipe located at the water inlet, and the liquid is thrown from the central flow channel to the side wall of the screening wheel. The liquid is discharged from several first through holes evenly distributed around the circumference, and a large volume of liquid is retained in the screening wheel. After the pumping is completed, the passage mechanism is switched to discharge the large volume of impurities filtered in the screening wheel.

[0011] Furthermore, the compensation mechanism includes a connecting column, a rotating ball, a first torsion spring seat, a first-level cam, a second torsion spring seat, a second-level cam, a third torsion spring seat, a third-level cam and an umbrella cover. The connecting column is fixedly connected to the main shaft and the assembly table. The rotating ball, the first torsion spring seat, the second torsion spring seat and the third torsion spring seat are fixedly connected to the connecting column. The first-level cam is fixedly connected to the first torsion spring seat, the second-level cam is fixedly connected to the second torsion spring seat, and the third-level cam is fixedly connected to the third torsion spring seat. The first-level cam, the second-level cam and the third-level cam are all rotatably connected to the connecting column. The first-level cam, the second-level cam and the third-level cam are all in contact with the umbrella cover. The umbrella cover is provided with an arc opening, which is slidably connected to the rotating ball.

[0012] Since the liquid enters the screening wheel under low pressure and is thrown out from the first through hole through the high-speed rotation of the screening wheel, high pressure is formed on the side of the screening wheel away from the water inlet, so that the pressures on both sides of the screening wheel are unequal, and an axial thrust pointing to the inlet water inlet is generated. The rotating high-speed liquid generates high pressure to impact the umbrella cover in different vector directions, and the umbrella cover slides around the rotating ball in the opposite direction of the high-pressure vector. When the umbrella cover deviates in a certain direction, the inner surface of the umbrella cover contacts the edges of the first-stage cam, the second-stage cam, and the third-stage cam. The first-stage cam rotates to squeeze the first torsion spring seat. The second-stage cam is similar to the third-stage cam. The impact kinetic energy of the high-pressure vector is absorbed by the spring deformation in the first torsion spring seat, the second torsion spring seat, and the third torsion spring seat to avoid high pressure damaging the connecting column.

[0013] Furthermore, the impeller mechanism includes a bottom shell, a bearing chassis, a first spring, an arc surface disk and a spring arc plate. The bottom shell is provided with a second through hole, the second through hole is fixedly connected to the main shaft, the bearing chassis is rotatably connected to the main shaft, the bearing chassis is slidably connected to the bottom shell, the first spring is fixedly connected to the bearing chassis and the arc surface disk, and the spring arc plates are provided with several groups, and the several groups of spring arc plates are evenly distributed around the circumference of the bearing chassis.

[0014] The main shaft drives the bottom shell to rotate. As the bottom shell rotates, one end of the spring arc plate rotates away from the center of the bottom shell. Through the high-speed rotation of several spring arc plates evenly distributed along the circumference of the edge of the bottom shell, the liquid is driven to diffuse toward the accelerating pump shell and pumped out along the volute tube. The high-speed rotating fluid will also cause high pressure to form on the side of the bottom shell close to the main hole. The high-pressure rotation pushes the arc disk to squeeze the first spring. The high-pressure impact kinetic energy is absorbed by the first spring, and the rotation kinetic energy is converted into the rotation of the bearing chassis, thereby avoiding the high pressure on both sides of the bottom shell from causing wear on the main shaft.

[0015] Furthermore, the passage mechanism includes an outer shell, a water inlet pipe, a slag discharge pipe and a three-way pipe. The outer shell is fixedly connected to the assembly pipe, the water inlet pipe and the slag discharge pipe, and the three-way pipe is rotatably connected to the outer shell.

[0016] When pumping liquid, one end of the tee is blocked by the shell, and the other two ends are connected to the water inlet pipe and the assembly pipe. After pumping liquid, the tee rotates, one end of the tee is blocked by the shell, and the other two ends are connected to the assembly pipe and the slag discharge pipe.

[0017] Furthermore, the kinetic energy recovery mechanism includes a base frame, a second motor, a third bearing frame, a servo cylinder, a column tube and a brake disc mechanism. The base frame is fixedly connected to the bottom plate, the second motor, the third bearing frame, the servo cylinder and the brake disc mechanism are all fixedly connected to the base frame, the output end of the second motor is rotatably connected to the third bearing frame, the output end of the second motor is fixedly connected to the brake disc mechanism, the column tube is fixedly connected to the output end of the servo cylinder and the brake disc mechanism, and the brake disc mechanism is in contact with the belt ring.

[0018] The high-speed rotating liquid drives the belt ring to rotate, and the belt ring contacts the brake disc mechanism. As the belt ring rotates at high speed, the disc wheel in the brake disc mechanism rotates at high speed, and the brake disc mechanism drives the output end of the second motor to rotate, and the rotor of the second motor rotates. At this time, the output end of the servo cylinder pushes the column, and the disc wheel in the brake disc mechanism brakes suddenly. The rotor connected to the output end of the second motor is fixed, and the magnetic field of the rotor continues to rotate due to inertia. The magnetic field of the stator reverses to stop the magnetic field of the rotor, and the kinetic energy of braking is recovered for power generation.

[0019] Furthermore, the brake disc mechanism includes a top plate, an assembly column, a second spring, a drum brake disc, a belt pulley, and a third ring frame. The assembly column is fixedly connected to the top plate and the third ring frame, the second spring is fixedly connected to the top plate and the drum brake disc, the drum brake disc is fixedly connected to the column tube, the drum brake disc and the column tube are slidably connected to the assembly column, the belt pulley is fixedly connected to the output end of the second motor, and the belt pulley is in contact with the belt ring.

[0020] The belt ring rotates at high speed and contacts the belt pulley, which drives the output end of the second motor to rotate. The rotor of the second motor rotates, and the output end of the servo cylinder pushes the column tube. The column tube pushes the drum brake disc to move toward the top disc and squeeze the second spring. The drum brake disc contacts the belt pulley, causing the belt pulley to brake the output end of the second motor suddenly, and the second motor recovers the kinetic energy of braking to generate electricity.

[0021] Compared with the prior art, the invention has the following beneficial effects: the invention designs a screening mechanism, the first motor outputs a torque to drive the screening wheel to rotate at a high speed, the fan blades disturb the airflow to generate a strong suction force, the liquid is drawn into the central flow channel of the screening wheel, and is thrown to the first through hole of the side wall for discharge, large-volume impurities are retained, and wear inside the pump body is avoided. After the pumping is completed, the three-way pipe rotates, the first motor outputs a reverse torque, and the large-volume impurities in the screening wheel are sprayed out to the slag discharge pipe through the assembly pipe and the three-way pipe; the invention designs a compensation mechanism, the liquid enters the screening wheel under low pressure, is thrown out through the high-speed rotation of the screening wheel, and forms a high pressure on the side of the screening wheel away from the water inlet, so that the pressures on both sides of the screening wheel are unequal, and an axial thrust pointing to the water inlet is generated, and the rotating high-speed liquid generates high pressure to impact the umbrella cover in different vector directions, and the umbrella cover slides around the rotating ball in the opposite direction of the high-pressure vector. When the umbrella cover deviates in a certain direction, the edge of the cam inside the inner surface of the umbrella cover squeezes the spring in the torsion spring seat through the cam, The spring deformation absorbs the impact kinetic energy of the high-pressure vector to avoid high-pressure damage to the connecting column. The torsion spring absorbs the impact kinetic energy of the pressure difference formed by high-speed rotation on both sides of the impeller to avoid impeller wear. The present invention designs a kinetic energy recovery mechanism. The belt ring rotates at high speed to contact the belt pulley, and the rotor of the second motor rotates. The output end of the servo cylinder pushes the drum brake disc to move toward the top disc and squeeze the second spring. The drum brake disc contacts the belt pulley, causing the belt pulley to brake the output end of the second motor suddenly. The rotor connected to the output end of the second motor is fixed, and the magnetic field of the rotor continues to rotate due to inertia. The magnetic field of the stator reverses to stop the magnetic field of the rotor, and the braking kinetic energy is recovered for power generation. The present invention can screen out a part of large-volume impurities in the liquid to ensure that no bumps and wear are caused to the internal parts of the pump body, and can offset the axial impact kinetic energy generated by the rotating high-speed liquid through polarization compensation to ensure that the impeller and other components will not wear quickly. The present invention can recover part of the rotational kinetic energy of the liquid through the braking belt ring to improve the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the centrifugal mechanism structure of the present invention; Figure 3 for Figure 2 A local enlarged schematic diagram of area A; Figure 4 It is a schematic diagram of the structure of the screening mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the impeller mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the passage mechanism of the present invention; Figure 7 It is a structural schematic diagram of the kinetic energy recovery mechanism of the present invention; Figure 8 It is a schematic diagram of the brake disc mechanism structure of the present invention.

[0023] In the figure: 1, bottom plate; 2, first motor; 3, coupling; 4, first ring frame; 5, centrifugal mechanism; 51, pump housing; 511, main hole; 512, water inlet; 513, ring groove; 52, first bearing frame; 53, main shaft; 54, screening mechanism; 541, assembly pipe; 542, screening wheel; 5421, first through hole; 5422, fan blade; 543, assembly table; 544, compensation mechanism; 5441, connecting column; 5442, rotating ball; 5443, first torsion spring seat; 5444, first cam; 5445, second torsion spring seat; 5446, second cam; 5447, third torsion spring seat; 5448, third cam; 5449, umbrella cover; 5449 1. Arc mouth; 55. Impeller mechanism; 551. Bottom shell; 5511. Second through hole; 552. Bearing chassis; 553. First spring; 554. Arc disk; 555. Spring arc plate; 56. Passage mechanism; 561. Shell; 562. Water inlet pipe; 563. Slag discharge pipe; 564. Tee pipe; 57. Volute pipe; 58. Belt ring; 6. Second ring frame; 7. Kinetic energy recovery mechanism; 71. Base frame; 72. Second motor; 73. Third bearing frame; 74. Servo cylinder; 75. Column; 76. Brake disc mechanism; 761. Top plate; 762. Assembly column; 763. Second spring; 764. Drum brake disc; 765. Belt pulley; 766. Third ring frame. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1 As shown, the present invention provides a technical solution of a centrifugal pump with anti-wear function for ships, including a base plate 1, a first motor 2, a coupling 3, a first ring frame 4, a centrifugal mechanism 5, a second ring frame 6 and a kinetic energy recovery mechanism 7. The first motor 2, the first ring frame 4, the second ring frame 6 and the kinetic energy recovery mechanism 7 are all fixedly connected to the base plate 1, the output end of the first motor 2 is transmission-connected to the coupling 3, the coupling 3 is fixedly connected to the first ring frame 4, the coupling 3 is transmission-connected to the centrifugal mechanism 5, the centrifugal mechanism 5 is fixedly connected to the second ring frame 6, and the centrifugal mechanism 5 is in contact with the kinetic energy recovery mechanism 7.

[0026] The present invention is an energy-saving centrifugal pump used on ships. The first motor 2 outputs a fixed-axis torque to a coupling 3, and the coupling 3 transmits the torque to a centrifugal mechanism 5. The wheel group inside the centrifugal mechanism 5 receives the torque. Relying on the high-speed rotation of the wheel group, the fluid obtains greater kinetic energy, and the kinetic energy of the fluid is converted into pressure energy by relying on the change of the volute cross-section at the flow channel. The flow of water in the centrifugal mechanism 5 is mainly affected by the centrifugal force, thereby realizing continuous transportation of the liquid. After the extraction and transportation of the fluid is completed, the kinetic energy recovery mechanism 7 contacts the centrifugal mechanism 5, and a part of the kinetic energy of the torque output by the first motor 2 is recovered by the kinetic energy recovery mechanism 7 to generate electricity, thereby achieving the effect of energy saving.

[0027] like Figure 2 , Figure 3 As shown, the centrifugal mechanism 5 includes a pump casing 51, a first bearing frame 52, a main shaft 53, a screening mechanism 54, an impeller mechanism 55, a passage mechanism 56, a volute tube 57 and a belt ring 58. The pump casing 51 is fixedly connected to the first bearing frame 52, the volute tube 57 and the second ring frame 6. The pump casing 51 is provided with a main hole 511, a water inlet 512 and an annular groove 513. The main shaft 53 is rotatably connected to the main hole 511 and the first bearing frame 52. The main shaft 53 is transmission-connected to the coupling 3. The impeller mechanism 55 is fixedly connected to the main shaft 53. The screening mechanism 54 is fixedly connected to the main shaft 53, the water inlet 512 and the passage mechanism 56. The belt ring 58 is slidably connected to the annular groove 513, and the belt ring 58 is in contact with the kinetic energy recovery mechanism 7.

[0028] The coupling 3 transmits torque to the main shaft 53, and the main shaft 53 ensures the fixed axis rotation in the first bearing frame 52. The main shaft 53 drives the screening mechanism 54 to rotate, generating suction to draw external liquid in through the water inlet 512. The liquid rotates at high speed through the central flow channel of the screening mechanism 54 and is thrown around. Large volume impurities in the liquid are screened to avoid wear on the subsequent impeller mechanism 55. Since the liquid enters the screening mechanism 54 under low pressure and is thrown out of the side wall, high pressure is formed on the side of the screening mechanism 54 away from the water inlet 512, so that the pressure on both sides of the screening mechanism 54 is unequal, resulting in An axial thrust directed to the inlet water inlet 512 is generated, and the axial thrust is offset by the structure of the screening mechanism 54 itself, thereby preventing the screening mechanism 54 from axial movement and causing wear and vibration of the main shaft 53. The fluid thrown out by the screening mechanism 54 is subjected to increased centrifugal force under the action of the impeller mechanism 55, and the liquid is pumped out along the volute pipe 57. At the same time, the high-speed rotating liquid drives the belt ring 58 to rotate, and the belt ring 58 contacts the kinetic energy recovery mechanism 7 to recover part of the kinetic energy of the fluid. After the pumping is completed, the passage mechanism 56 is switched to discharge the large-volume impurities filtered in the screening mechanism 54.

[0029] like Figure 4As shown, the screening mechanism 54 includes an assembly pipe 541, a screening wheel 542, an assembly platform 543, and a compensation mechanism 544. The assembly pipe 541 is fixedly connected to the water inlet 512 and the passage mechanism 56. The assembly pipe 541 is rotatably connected to the screening wheel 542. The assembly platform 543 is fixedly connected to the screening wheel 542 and the compensation mechanism 544. The compensation mechanism 544 is fixedly connected to the main shaft 53. The screening wheel 542 is provided with a first through hole 5421 and a fan blade 5422. The first through hole 5421 and the fan blade 5422 are both provided with a plurality of groups. The plurality of groups of first through holes 5421 are evenly distributed along the circumference of the side wall of the screening wheel 542, and the plurality of groups of fan blades 5422 are evenly distributed along the circumference of the inner wall of the screening wheel 542.

[0030] The main shaft 53 drives the screening wheel 542 to rotate, and the screening wheel 542 rotates clockwise at a high speed in the specified direction. Since the fan blades 5422 arranged clockwise on the inner wall of the screening wheel 542 disturb the airflow to generate strong suction, the external liquid is drawn into the central flow channel of the screening wheel 542 through the assembly pipe 541 located at the water inlet 512, and the liquid is thrown from the central flow channel to the side wall of the screening wheel 542. The liquid is discharged from a plurality of first through holes 5421 evenly distributed around the circumference, and a large volume of liquid is retained in the screening wheel 542. After the pumping is completed, the passage mechanism 56 is switched to discharge the large volume of impurities filtered in the screening wheel 542.

[0031] like Figure 4 As shown, the compensation mechanism 544 includes a connecting column 5441, a rotating ball 5442, a first torsion spring seat 5443, a primary cam 5444, a second torsion spring seat 5445, a secondary cam 5446, a third torsion spring seat 5447, a third cam 5448 and an umbrella cover 5449. The connecting column 5441 is fixedly connected to the main shaft 53 and the assembly table 543. The rotating ball 5442, the first torsion spring seat 5443, the second torsion spring seat 5445 and the third torsion spring seat 5447 are fixedly connected to the connecting column 5441. The primary cam 5444 is fixedly connected to the main shaft 53 and the assembly table 543. The first torsion spring seat 5443 is fixedly connected, the secondary cam 5446 is fixedly connected to the second torsion spring seat 5445, the tertiary cam 5448 is fixedly connected to the third torsion spring seat 5447, the first cam 5444, the second cam 5446, and the tertiary cam 5448 are all rotatably connected to the connecting column 5441, the first cam 5444, the second cam 5446, and the tertiary cam 5448 are all in contact with the umbrella cover 5449, the umbrella cover 5449 is provided with an arc opening 54491, and the arc opening 54491 is slidably connected to the rotating ball 5442.

[0032] Since the liquid enters the screening wheel 542 under low pressure, it is thrown out from the first through hole 5421 through the high-speed rotation of the screening wheel 542, and high pressure is formed on the side of the screening wheel 542 away from the water inlet 512, so that the pressures on both sides of the screening wheel 542 are unequal, and an axial thrust pointing to the inlet water inlet 512 is generated. The rotating high-speed liquid generates high pressure to impact the umbrella cover 5449 in different vector directions, and the umbrella cover 5449 slides around the rotating ball 5442 in the opposite direction of the high-pressure vector. When the umbrella cover 5449 deviates in a certain direction, the inner surface of the umbrella cover 5449 contacts the edges of the first-stage cam 5444, the second-stage cam 5446, and the third-stage cam 5448. The first-stage cam 5444 rotates to squeeze the first torsion spring seat 5443. The second-stage cam 5446 is similar to the third-stage cam 5448. The impact kinetic energy of the high-pressure vector is absorbed by the spring deformation in the first torsion spring seat 5443, the second torsion spring seat 5445, and the third torsion spring seat 5447, so as to avoid the high pressure from damaging the connecting column 5441.

[0033] like Figure 5 As shown, the impeller mechanism 55 includes a bottom shell 551, a bearing chassis 552, a first spring 553, a cambered disk 554 and a spring arc plate 555. The bottom shell 551 is provided with a second through hole 5511, the second through hole 5511 is fixedly connected to the main shaft 53, the bearing chassis 552 is rotatably connected to the main shaft 53, the bearing chassis 552 is slidably connected to the bottom shell 551, the first spring 553 is fixedly connected to the bearing chassis 552 and the cambered disk 554, and the spring arc plates 555 are provided with a plurality of groups, and the plurality of groups of spring arc plates 555 are evenly distributed around the circumference of the bearing chassis 552.

[0034] The main shaft 53 drives the bottom shell 551 to rotate. As the bottom shell 551 rotates, one end of the spring arc plate 555 rotates away from the center of the bottom shell 551. Through the high-speed rotation of a number of spring arc plates 555 evenly distributed along the circumference of the edge of the bottom shell 551, the liquid is driven to rotate and diffuse toward the acceleration pump shell 51 and pumped out along the volute pipe 57. The high-speed rotating fluid will also cause high pressure to form on the side of the bottom shell 551 close to the main hole 511. The high-pressure rotation pushes the arc plate 554 to squeeze the first spring 553. The first spring 553 absorbs the high-pressure impact kinetic energy, and the rotational kinetic energy is converted into the rotation of the bearing chassis 552, thereby preventing the high pressure on both sides of the bottom shell 551 from causing wear to the main shaft 53.

[0035] like Figure 6 As shown, the passage mechanism 56 includes a shell 561 , a water inlet pipe 562 , a slag discharge pipe 563 and a three-way pipe 564 . The shell 561 is fixedly connected to the assembly pipe 541 , the water inlet pipe 562 , and the slag discharge pipe 563 , and the three-way pipe 564 is rotatably connected to the shell 561 .

[0036] When pumping liquid, one end of the three-way pipe 564 is blocked by the outer shell 561, and the other two ends are connected to the water inlet pipe 562 and the assembly pipe 541. After pumping liquid, the three-way pipe 564 rotates, one end of the three-way pipe 564 is blocked by the outer shell 561, and the other two ends are connected to the assembly pipe 541 and the slag discharge pipe 563. The first motor 2 outputs a reverse torque to spray large-volume impurities in the screening wheel 542 through the assembly pipe 541 and the three-way pipe 564 to the slag discharge pipe 563.

[0037] like Figure 7 As shown, the kinetic energy recovery mechanism 7 includes a base frame 71, a second motor 72, a third bearing frame 73, a servo cylinder 74, a column 75 and a brake disc mechanism 76. The base frame 71 is fixedly connected to the base plate 1, the second motor 72, the third bearing frame 73, the servo cylinder 74 and the brake disc mechanism 76 are all fixedly connected to the base frame 71, the output end of the second motor 72 is rotatably connected to the third bearing frame 73, the output end of the second motor 72 is fixedly connected to the brake disc mechanism 76, the column 75 is fixedly connected to the output end of the servo cylinder 74 and the brake disc mechanism 76, and the brake disc mechanism 76 is in contact with the belt ring 58.

[0038] The high-speed rotating liquid drives the belt ring 58 to rotate, and the belt ring 58 contacts the brake disc mechanism 76. As the belt ring 58 rotates at a high speed, the disc wheel in the brake disc mechanism 76 rotates at a high speed, and the brake disc mechanism 76 drives the output end of the second motor 72 to rotate, and the rotor of the second motor 72 rotates. At this time, the output end of the servo cylinder 74 pushes the column 75, and the disc wheel in the brake disc mechanism 76 brakes suddenly. The rotor connected to the output end of the second motor 72 is fixed, and the magnetic field of the rotor continues to rotate due to inertia. The magnetic field of the stator reverses to stop the magnetic field of the rotor, and the kinetic energy of braking is recovered for power generation.

[0039] like Figure 8 As shown, the brake disc mechanism 76 includes a top plate 761, an assembly column 762, a second spring 763, a drum brake disc 764, a belt pulley 765, and a third ring frame 766. The assembly column 762 is fixedly connected to the top plate 761 and the third ring frame 766. The second spring 763 is fixedly connected to the top plate 761 and the drum brake disc 764. The drum brake disc 764 is fixedly connected to the column tube 75. The drum brake disc 764 and the column tube 75 are slidably connected to the assembly column 762. The belt pulley 765 is fixedly connected to the output end of the second motor 72, and the belt pulley 765 is in contact with the belt ring 58.

[0040] The belt ring 58 rotates at high speed and contacts the belt pulley 765. The belt pulley 765 drives the output end of the second motor 72 to rotate. The rotor of the second motor 72 rotates. The output end of the servo cylinder 74 pushes the column 75. The column 75 pushes the drum brake disc 764 to move toward the top disc 761 and squeeze the second spring 763. The drum brake disc 764 contacts the belt pulley 765, causing the belt pulley 765 to brake the output end of the second motor 72 suddenly. The second motor 72 recovers the kinetic energy of braking to generate electricity.

[0041] The working principle of the present invention is as follows: the output torque of the first motor 2 is transmitted to the main shaft 53 through the coupling 3, driving the screening wheel 542 to rotate at a high speed, and the fan blades 5422 disturb the airflow to generate a strong suction force. The liquid is drawn into the central flow channel of the screening wheel 542 through the assembly pipe 541, and is thrown out to the first through hole 5421 on the side wall of the screening wheel 542 for discharge. Large volume impurities are retained in the screening wheel 542 to avoid wear on the subsequent impeller mechanism 55. The liquid enters the screening wheel 542 under low pressure, and is thrown out by the high-speed rotation of the screening wheel 542. When the screening wheel 542 is away from the water inlet 512, the liquid is discharged. High pressure is formed on the side, so that the pressure on both sides of the screening wheel 542 is unequal, and an axial thrust pointing to the inlet water inlet 512 is generated. The rotating high-speed liquid generates high pressure to impact the umbrella cover 5449 in different vector directions. The umbrella cover 5449 deviates and slides around the rotating ball 5442 in the opposite direction of the high-pressure vector. When the umbrella cover 5449 deviates in a certain direction, the inner surface of the umbrella cover 5449 contacts the edges of the primary cam 5444, the secondary cam 5446, and the tertiary cam 5448. The primary cam 5444 rotates to squeeze the first torsion spring seat 5443, and the secondary cam 544 Similar to the three-stage cam 5448, the impact kinetic energy of the high-pressure vector is absorbed by the spring deformation in the first torsion spring seat 5443, the second torsion spring seat 5445, and the third torsion spring seat 5447 to prevent the high pressure from damaging the connecting column 5441. The main shaft 53 drives the bottom shell 551 to rotate, and the plurality of spring arc plates 555 evenly distributed along the circumference of the edge of the bottom shell 551 rotate at high speed, driving the liquid to rotate and diffuse toward the acceleration pump shell 51 and pump out along the volute pipe 57. The high-speed rotating fluid will also cause the bottom shell 551 to form a high pressure on the side close to the main hole 511, and the high-pressure rotation pushes the arc surface The disk 554 squeezes the first spring 553, and the first spring 553 absorbs the high-pressure impact kinetic energy. The rotating kinetic energy vector is converted into the rotation of the bearing chassis 552, so as to avoid the high pressure on both sides of the bottom shell 551 from causing wear to the main shaft 53, and realize the continuous transportation of the liquid. After the extraction and transportation of the fluid is completed, the kinetic energy recovery mechanism 7 contacts the centrifugal mechanism 5, and a part of the kinetic energy of the output torque of the first motor 2 is recovered through the kinetic energy recovery mechanism 7 to generate electricity, so as to achieve the effect of energy saving. After the pumping is completed, the passage mechanism 56 is switched to discharge the large-volume impurities filtered in the screening wheel 542.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A centrifugal pump with anti-wear function for ships, characterized in that: The centrifugal pump comprises a base plate (1), a first motor (2), a coupling (3), a first ring frame (4), a centrifugal mechanism (5), a second ring frame (6) and a kinetic energy recovery mechanism (7); the first motor (2), the first ring frame (4), the second ring frame (6) and the kinetic energy recovery mechanism (7) are all fixedly connected to the base plate (1); an output end of the first motor (2) is drivingly connected to the coupling (3); the coupling (3) is fixedly connected to the first ring frame (4); the coupling (3) is drivingly connected to the centrifugal mechanism (5); the centrifugal mechanism (5) is fixedly connected to the second ring frame (6); and the centrifugal mechanism (5) is in contact with the kinetic energy recovery mechanism (7); The centrifugal mechanism (5) comprises a screening mechanism (54); The screening mechanism (54) comprises a compensation mechanism (544); The compensation mechanism (544) comprises a connecting column (5441), a rotating ball (5442), a first torsion spring seat (5443), a primary cam (5444), a second torsion spring seat (5445), a secondary cam (5446), a third torsion spring seat (5447), a third cam (5448) and an umbrella cover (5449); the rotating ball (5442), the first torsion spring seat (5443), the second torsion spring seat (5445) and the third torsion spring seat (5447) are all fixedly connected to the connecting column (5441); the primary cam (5444) is fixedly connected to the first torsion spring seat (5443); The secondary cam (5446) is fixedly connected to the second torsion spring seat (5445), the tertiary cam (5448) is fixedly connected to the third torsion spring seat (5447), the primary cam (5444), the secondary cam (5446), and the tertiary cam (5448) are all rotatably connected to the connecting column (5441), the primary cam (5444), the secondary cam (5446), and the tertiary cam (5448) are all in contact with the umbrella cover (5449), the umbrella cover (5449) is provided with an arc opening (54491), and the arc opening (54491) is slidably connected to the rotating ball (5442).

2. A centrifugal pump with anti-wear function for ships according to claim 1, characterized in that: The centrifugal mechanism (5) comprises a pump casing (51), a first bearing frame (52), a main shaft (53), an impeller mechanism (55), a passage mechanism (56), a volute tube (57) and a belt ring (58); the pump casing (51) is fixedly connected to the first bearing frame (52), the volute tube (57) and the second ring frame (6); the pump casing (51) is provided with a main hole (511), a water inlet (512) and an annular groove (513); the main shaft (53) is rotatably connected to the main hole (511) and the first bearing frame (52); the main shaft (53) is transmission-connected to a coupling (3); the impeller mechanism (55) is fixedly connected to the main shaft (53); the screening mechanism (54) is fixedly connected to the main shaft (53), the water inlet (512) and the passage mechanism (56); the belt ring (58) is slidably connected to the annular groove (513); and the belt ring (58) is in contact with a kinetic energy recovery mechanism (7).

3. A centrifugal pump with anti-wear function for ships according to claim 2, characterized in that: The screening mechanism (54) comprises an assembly pipe (541), a screening wheel (542), and an assembly platform (543); the assembly pipe (541) is fixedly connected to the water inlet (512) and the passage mechanism (56); the assembly pipe (541) is rotatably connected to the screening wheel (542); the assembly platform (543) is fixedly connected to the screening wheel (542) and the compensation mechanism (544); the compensation mechanism (544) is fixedly connected to the main shaft (53); the screening wheel (542) is provided with first through holes (5421) and fan blades (5422); the first through holes (5421) and the fan blades (5422) are provided in a plurality of groups; the plurality of groups of the first through holes (5421) are evenly distributed along the circumference of the side wall of the screening wheel (542); and the plurality of groups of the fan blades (5422) are evenly distributed along the circumference of the inner wall of the screening wheel (542).

4. A centrifugal pump with anti-wear function for ships according to claim 3, characterized in that: The connecting column (5441) is fixedly connected to the main shaft (53) and the assembly platform (543).

5. The centrifugal pump with anti-wear function for ships according to claim 2, characterized in that: The impeller mechanism (55) comprises a bottom shell (551), a bearing chassis (552), a first spring (553), a cambered disk (554) and a spring camber plate (555); the bottom shell (551) is provided with a second through hole (5511); the second through hole (5511) is fixedly connected to the main shaft (53); the bearing chassis (552) is rotatably connected to the main shaft (53); the bearing chassis (552) is slidably connected to the bottom shell (551); the first spring (553) is fixedly connected to the bearing chassis (552) and the cambered disk (554); and the spring camber plates (555) are provided in a plurality of groups; the plurality of groups of spring camber plates (555) are evenly distributed around the circumference of the bearing chassis (552).

6. The centrifugal pump with anti-wear function for ships according to claim 3, characterized in that: The passage mechanism (56) comprises an outer shell (561), a water inlet pipe (562), a slag discharge pipe (563) and a three-way pipe (564); the outer shell (561) is fixedly connected to the assembly pipe (541), the water inlet pipe (562) and the slag discharge pipe (563); and the three-way pipe (564) is rotatably connected to the outer shell (561).

7. A centrifugal pump with anti-wear function for ships according to claim 2, characterized in that: The kinetic energy recovery mechanism (7) comprises a base frame (71), a second motor (72), a third bearing frame (73), a servo cylinder (74), a column (75) and a brake disc mechanism (76); the base frame (71) is fixedly connected to the bottom plate (1); the second motor (72), the third bearing frame (73), the servo cylinder (74) and the brake disc mechanism (76) are all fixedly connected to the base frame (71); the output end of the second motor (72) is rotationally connected to the third bearing frame (73); the output end of the second motor (72) is fixedly connected to the brake disc mechanism (76); the column (75) is fixedly connected to the output end of the servo cylinder (74) and the brake disc mechanism (76); and the brake disc mechanism (76) is in contact with the belt ring (58).

8. A centrifugal pump with anti-wear function for ships according to claim 7, characterized in that: The brake disc mechanism (76) comprises a top disc (761), an assembly column (762), a second spring (763), a drum brake disc (764), a belt pulley (765), and a third ring frame (766); the assembly column (762) is fixedly connected to the top disc (761) and the third ring frame (766); the second spring (763) is fixedly connected to the top disc (761) and the drum brake disc (764); the drum brake disc (764) is fixedly connected to the column tube (75); the drum brake disc (764) and the column tube (75) are slidably connected to the assembly column (762); the belt pulley (765) is fixedly connected to the output end of the second motor (72); and the belt pulley (765) is in contact with the belt ring (58).

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