A pipeline-type silent intelligent booster water pump

Abstract

This invention discloses a pipeline-type silent intelligent booster water pump, comprising an inlet and an outlet pipe at both ends of a pipeline sleeve; an impeller assembly disposed inside the pipeline sleeve and facing the inlet; a water pump motor disposed inside the pipeline sleeve to drive the impeller assembly to rotate; a rotor cavity of the water pump motor communicating with the outlet of the impeller assembly; and a motor heat dissipation structure for simultaneously dissipating heat from the outside of the motor stator, the inside of the motor stator, and the motor rotor. This invention can increase the heat dissipation effect of the motor.

Description

Technical Field

[0001] This invention relates to a booster pump, and more particularly to a pipe-type silent intelligent booster pump for household pipeline pressurization. Background Technology

[0002] With the development of modern society, more and more families are using household variable frequency booster water pumps.

[0003] Current household variable frequency booster pumps have the following characteristics: The motor and pump require a mechanical seal to isolate the motor from water ingress. The motor needs ball bearings for support, generating rolling friction noise and wear on the balls during rotation. High-speed rotating impellers throw water out, impacting the pump body wall and causing noise from cavitation and rupture. Without shielding these sounds, the user experience will be negatively affected. Traditional induction motors have relatively low power density and efficiency, resulting in a larger volume than permanent magnet motors for the same power output, consuming significant amounts of steel, copper, and aluminum. The separate design of the inverter, induction motor, pump, and cooling fan contributes to the overall bulky size. Most traditional self-priming electric pumps are vortex pumps. The spur-tooth copper impeller in a vortex pump has a very small clearance with the pump body, leading to severe friction noise between the impeller and the pump body at high pressures.

[0004] Existing household variable frequency booster pumps have the following technical problems: 1. Water vapor isolation between the motor and pump requires a friction-sealed mechanical seal, which results in mechanical seal friction loss and reduces overall efficiency. This structure is complex, and the mechanical seal is a consumable component, prone to failure and leakage, requiring regular replacement. 2. Most traditional self-priming electric pumps are vortex pumps, which generate significant noise at high water pressure. 3. Induction motors have low power density and efficiency, are large in size, and waste materials. 4. Traditional multi-stage centrifugal pumps and unshielded electric pumps generate noise due to high-speed water flow impacting the pump walls, cavitation, and rupture. 5. The ball bearings supporting the motor shaft have poor dust and water resistance; high-speed rotation causes rolling friction wear on the balls, leading to bearing noise. 6. Traditional self-priming centrifugal pumps are large in size, with the inlet at the front and the outlet at the top, making pipe installation complex. Multiple multi-directional pipe connections are required for installation, resulting in a large installation area and material waste.

[0005] In addition, existing household variable frequency booster water pumps typically cool or dissipate heat on the stator side of the motor, but the cooling or heat dissipation effect is not good. Summary of the Invention

[0006] The purpose of this invention is to provide a pipeline-type silent intelligent booster water pump, which is mainly used to solve the technical problem of poor motor stator cooling or heat dissipation in the prior art.

[0007] The present invention provides a pipeline-type silent intelligent booster water pump comprising:

[0008] The inlet and outlet pipes are installed at both ends of the pipe sleeve;

[0009] An impeller assembly installed inside a pipe sleeve and facing the water inlet;

[0010] A water pump motor is installed inside the pipe sleeve to drive the impeller assembly to rotate.

[0011] The rotor chamber of the water pump motor is connected to the outlet of the impeller assembly; and

[0012] A motor cooling structure used to simultaneously dissipate heat from the outside of the motor stator, the inside of the motor stator, and the motor rotor.

[0013] Preferably, the motor heat dissipation structure includes:

[0014] A shielding sleeve assembly installed between the rotor and the inner side of the stator of a water pump motor to prevent water from entering the stator;

[0015] The shielding sleeve assembly is made of a non-magnetic heat dissipation material that can form an internal water flow channel, and is used to dissipate heat on the inside of the motor stator and the motor rotor by using the water flow pumped in from the outlet of the impeller assembly.

[0016] Preferably, the shielding sleeve assembly consists of a stator shielding sleeve and a rotor shielding sleeve, and there is a gap between the stator shielding sleeve and the rotor shielding sleeve to form the internal water flow channel.

[0017] Preferably, the motor heat dissipation structure further includes: an external water flow channel formed between the motor housing and the pipe sleeve, used to dissipate heat from the outside of the motor stator by water flowing from the impeller assembly to the outlet pipe through the motor housing.

[0018] Preferably, one end of the shielding sleeve assembly is connected to the external water passage, and the other end of the shielding sleeve assembly is connected to the rotor cavity.

[0019] The pipeline-type silent intelligent booster water pump of the present invention further includes: an inverter assembly disposed within the pipeline sleeve for providing frequency conversion power to the water pump motor; and a one-way valve assembly disposed in the outlet pipe, the one-way valve assembly having an automatic water pump shutdown control device for stopping the inverter assembly from supplying power to the water pump motor when the one-way valve assembly performs a closing operation.

[0020] Preferably, the one-way valve assembly includes: a one-way valve seat mounted on the outlet pipe; a plunger seal mounted on the one-way valve seat; and a one-way valve plunger for moving and contacting the plunger seal when the one-way valve assembly performs a closing operation, and moving away from the plunger seal when the one-way valve assembly performs an opening operation.

[0021] Preferably, the automatic pump shutdown control device includes: a magnetic induction switch installed on the outside of the water pipe; and a magnet installed on the one-way valve plunger, used to approach the magnetic induction switch when the one-way valve assembly performs a closing operation, thereby cutting off the power supply circuit of the magnetic induction switch by magnetic force.

[0022] Preferably, the rotor cavity of the water pump motor is connected to the outlet of the impeller assembly, and is equipped with a ceramic shaft serving as the water pump motor shaft, a ceramic bearing supporting the ceramic shaft, and a rotor assembly mounted on the ceramic shaft.

[0023] Preferably, the ceramic bearing includes a front ceramic bearing for supporting the front end of the ceramic shaft facing the impeller assembly, and a rear ceramic bearing for supporting the rear end of the ceramic shaft.

[0024] Preferably, a front bearing bracket for supporting the front ceramic bearing is installed between the front ceramic bearing and the front cover of the water pump motor. The front bearing bracket has an inlet hole and an outlet hole for the water flow channel of the rotor cavity.

[0025] Preferably, the front ceramic bearing and the rear ceramic bearing have gaps between themselves and the ceramic shaft to allow a small amount of water to flow through the rotor cavity. This gap is used to form a water film between the front ceramic bearing and the ceramic shaft and between the rear ceramic bearing and the ceramic shaft when the shaft rotates at high speed, thereby reducing bearing noise.

[0026] Preferably, the impeller shaft is a stainless steel shaft that is fitted onto the ceramic shaft by a hot pressing process.

[0027] Preferably, the impeller assembly includes at least one impeller unit, each impeller unit consisting of an impeller and a guide plate, the impeller being movably sleeved on the impeller shaft, and the guide plate being fixedly connected to the pipe sleeve.

[0028] The main technical effects of this invention are: 1) The rotor and stator of the motor are shielded and isolated using non-magnetic and heat-dissipating stainless steel. The magnetic field generated by the stator can pass through the stainless steel and act on the permanent magnet rotor, achieving water vapor isolation without mechanical sealant; 2) By shielding and isolating the rotor and stator of the motor, the inner sides of the rotor cavity and stator cavity of the water pump motor are formed, and a shielding sleeve made of non-magnetic stainless steel is formed between the inner sides of the rotor cavity and the stator cavity of the water pump motor to prevent water from entering the stator cavity and to dissipate heat from the inner side of the stator cavity using the water flow pumped into the rotor cavity from the outlet of the impeller assembly; 3) A pumping channel from the impeller assembly to the outlet pipe is formed between the motor housing and the pipe sleeve on the outside of the stator cavity, and the water flow in the pumping channel is used to cool the outside of the stator cavity; 4) When the one-way valve is closed, the plunger drives the magnet to reset. The magnet reset can be sensed by the magnetic sensing element outside the outlet pipe, realizing the automatic shutdown of the electric pump.

[0029] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0030] Figure 1 This is an external view of the pipeline-type silent intelligent booster water pump of the present invention;

[0031] Figure 2 yes Figure 1 The image shows a front view of the outlet side of a pipeline-type silent intelligent booster water pump.

[0032] Figure 3 yes Figure 2 AA section view;

[0033] Figure 4 yes Figure 2 BB section view;

[0034] Figure 5 yes Figure 3 Enlarged view of section C;

[0035] Figure 6 yes Figure 4 Enlarged view of section E in the middle;

[0036] Figure 7 This is an exploded view of an impeller unit of the impeller assembly of the present invention;

[0037] Figure 8 yes Figure 4 CC section view.

[0038] Explanation of reference numerals in the attached drawings: Pipe sleeve 100, pump front cover 101, screw 102, lead pipe 103, pump rear cover 104, water inlet 105, cylindrical pin 106, T-pin 107, countersunk screw 108, screw 109; Motor bracket 200, motor front cover 201, motor housing 202, stator cavity 203, stator core 2031, motor rear cover 204, rear ceramic bearing 205, ceramic sliding bearing 2051, limiting sliding assembly 2052, ceramic shaft 206, shaft cavity 2061, shaft water inlet 2062, rotor cavity 207, rotor magnet 2071, rotor core 2072, rotor ball end cover 2073, front ceramic bearing 208, ceramic sliding bearing 2081, limiting sliding assembly 2082, silicon carbide. Circular ring 20820, stainless steel housing 20821, stainless steel positioning key 20822, limiting component 2083, limiting copper sleeve 20830, limiting copper sleeve positioning groove 20831, shielding sleeve assembly 209, stator shielding sleeve 2091, rotor shielding sleeve 2092, front bearing bracket 210, front bearing bracket end 211; guide plate 300, impeller 301, stainless steel shaft 302, hub 303, stainless steel cover plate 304; water outlet pipe 400, one-way valve assembly 401, magnetic induction element 402, pressure sensor 403, venting nail 404, magnetic block 405, return spring 406, one-way valve bracket 407, one-way valve seat 408, plunger seal 409, one-way valve sealing ring 410; inverter 500; external water flow to 600. Detailed Implementation

[0039] This invention is a kind of Figure 1 The pipeline-type silent intelligent booster water pump shown includes Figure 2 The diagram shows an inlet 105 and an outlet pipe 400 at both ends of the pipe sleeve 100; an impeller assembly disposed inside the pipe sleeve 100 and facing the inlet 105; a water pump motor disposed inside the pipe sleeve 100 for driving the impeller assembly to rotate; a rotor cavity 207 of the water pump motor communicating with the outlet of the impeller assembly; and a motor heat dissipation structure for simultaneously dissipating heat from the outside of the stator in the motor stator cavity 203, the inside of the stator in the motor stator cavity 203, and the stator in the motor rotor cavity 207.

[0040] Since the present invention can simultaneously cool or dissipate heat on the outer side of the motor stator, the inner side of the motor stator, and the motor rotor cavity, it can improve the cooling or heat dissipation effect of the water pump motor.

[0041] See Figure 3The motor heat dissipation structure of the present invention includes: a shielding sleeve assembly 209 installed between the inner sides of the rotor cavity 207 and the stator cavity 203 of the water pump motor to prevent water from entering the stator; the shielding sleeve assembly 209 is made of a non-magnetic heat dissipation material that can form an internal water flow channel, and is used to dissipate heat from the inner side of the stator in the stator cavity 203 and the rotor in the rotor cavity of the motor by means of water flow pumped in from the outlet of the impeller assembly.

[0042] See Figure 6 The shielding sleeve assembly 209 is composed of a stator shielding sleeve 2091 and a rotor shielding sleeve 2092, with a gap between the stator shielding sleeve 2091 and the rotor shielding sleeve 2092 forming an internal water flow channel. The stator cavity 203 is enclosed by the stator shielding sleeve 2091 and the motor housing 202. The rotor cavity 207 is defined by the rotor shielding sleeve 2092.

[0043] The motor heat dissipation structure of the present invention also includes an external water flow channel formed between the motor housing 202 and the pipe sleeve 100, which is used to dissipate heat from the outside of the stator in the motor stator cavity 203 by the water flow from the impeller assembly to the outlet pipe through the motor housing 202.

[0044] like Figure 3 and Figure 4 As shown, one end of the shielding sleeve assembly 209 is located at the inlet of the external water flow channel, and the other end of the shielding sleeve assembly is located at the rear end of the rotor cavity 207.

[0045] The pipeline-type silent intelligent booster water pump of the present invention further includes: an inverter assembly 500 disposed within the pipeline sleeve 100 for providing frequency conversion power to the water pump motor; and a one-way valve assembly disposed in the outlet pipe 400, the one-way valve assembly having an automatic water pump shutdown control device for stopping the inverter assembly 500 from supplying power to the water pump motor when the one-way valve assembly performs a closing operation, thereby realizing the function of automatically shutting down the water pump when the water pressure in the outlet pipe is higher than a predetermined value.

[0046] The present invention can also include a pressure sensor 403 for detecting the water pressure in the outlet pipe 400. The inverter assembly operates based on the water pressure detected by the pressure sensor 403. When the water pressure detected by the pressure sensor 403 exceeds a threshold, it stops supplying power to the water pump motor, thus automatically stopping the water pump. The present invention achieves the automatic water pump shutdown function by using both the pressure sensor 403 and the automatic water pump shutdown control device, thereby increasing the reliability of the automatic shutdown.

[0047] See Figure 5The one-way valve assembly of the booster water pump of the present invention includes: a one-way valve seat 408 installed on the outlet pipe 400; a plunger seal 409 installed on the one-way valve seat 408; and a one-way valve plunger 401, which is used to move and contact the plunger seal 409 when the one-way valve assembly performs a closing operation, and to move away from the plunger seal 409 when the one-way valve assembly performs an opening operation.

[0048] If the water pressure at the outlet is greater than the pressure of the water pumped in by the impeller assembly, backflow will occur. This happens when the water consumption in the direction of the booster pump's outlet is less than a certain value (e.g., no user is using water). The one-way valve assembly prevents this backflow. Specifically, if the water pressure at the outlet reaches a predetermined value, the one-way valve plunger 401, under the action of the return spring 406, will contact the plunger seal 409, closing the water flow channel. One feature of this invention is the inclusion of a linked automatic pump shutdown control device in the one-way valve assembly. When the one-way valve plunger 401 moves away from the plunger seal 409, the automatic pump shutdown control device activates the pump motor; when the one-way valve plunger 401 contacts the plunger seal 409, the automatic pump shutdown control device stops the pump motor.

[0049] See Figure 5 The automatic pump shutdown control device includes: a magnetic induction switch 402 installed on the outside of the water pipe 400; and a magnet 405 installed on the one-way valve plunger 401, which is used to approach the magnetic induction switch 402 when the one-way valve assembly performs a closing operation, and cut off the power supply circuit of the magnetic induction switch 402 by magnetic force.

[0050] The performance of a water pump depends to some extent on the heat dissipation capacity of its motor. During operation, the pump motor generates a significant amount of heat. If this heat cannot be dissipated in time, it can damage the pump, such as causing the motor to burn out or high-power components of the inverter to fail. This invention addresses this by establishing a water channel from the impeller assembly to the outlet pipe 400 between the motor rear cover 204 (where the inverter assembly is installed) and the motor housing 202 (where the pump motor is installed) and the pipe sleeve 100. This channel utilizes flowing water to cool the inverter assembly and the pump motor.

[0051] The rotor cavity 207 of the water pump motor of the present invention is connected to the outlet of the impeller assembly and is equipped with a ceramic shaft 206 serving as the motor shaft, a ceramic bearing 205 supporting the ceramic shaft, and a rotor assembly fitted onto the ceramic shaft. The rotor cavity 207 contains a rotor core fitted onto the motor shaft and magnetic tiles fixed to the rotor core. See [reference needed]. Figure 6 The stator cavity 203 contains the stator core and stator coils, which are used to generate the magnetic field that drives the rotor to rotate.

[0052] This invention involves installing a shielding sleeve 209 between the rotor cavity 207 and the stator cavity 203 of a water pump motor to prevent water from entering the stator cavity 203. The shielding sleeve 209 is made of a non-magnetic heat-dissipating material such as stainless steel. On the one hand, it allows the magnetic field generated by the stator to pass through the shielding sleeve and act on the permanent magnet rotor. On the other hand, the metal shielding sleeve 209 carries the heat generated by the stator outside the pump body through the water flow, thus achieving the effect of heat dissipation for the stator.

[0053] See Figure 6 The shielding sleeve assembly 209 of the present invention is composed of a stator shielding sleeve 2091 for forming a stator cavity and a rotor shielding sleeve 2092. There is a gap between the stator shielding sleeve 2091 and the rotor shielding sleeve 2092 for forming a water flow channel in the rotor cavity, which can carry away the heat generated by the stator and realize heat dissipation of the stator.

[0054] See Figure 3 The ceramic bearing of the present invention includes a front ceramic bearing 208 for supporting the front end of a ceramic shaft facing the impeller assembly, and a rear ceramic bearing 205 for supporting the rear end of the ceramic shaft. The front and rear ceramic bearings 208 and 205 have gaps between themselves and the ceramic shaft 206 to allow a small amount of water to flow through the rotor cavity. This gap helps form a water film between the front and rear ceramic bearings 208 and the ceramic shaft, and between the rear and rear ceramic bearings 205, when the shaft rotates at high speed, thereby reducing bearing noise. Furthermore, the ceramic shaft 206 and the ceramic bearings are resistant to deformation at high temperatures and have low frictional loss, which not only increases the pump's lifespan but also improves efficiency.

[0055] Figure 3 The front ceramic bearing 208 shown is a thrust bearing. Figure 3 As shown, the rear ceramic bearing 205 has the same structure as the front ceramic bearing 208 and is also a thrust bearing.

[0056] See Figure 4 The present invention also includes a front bearing bracket 210 for supporting the front ceramic bearing installed between the front ceramic bearing and the front cover 201 of the water pump motor. The front bearing bracket 210 has a water inlet hole for the rotor cavity water flow channel. The ceramic shaft 206 has a shaft water channel 2061 located at the shaft center and leading to the water inlet of the impeller assembly and a shaft water inlet hole 2062 connecting the shaft water channel 2061, so that the water pumped out by the impeller assembly enters and exits the rotor cavity, forming a small amount of circulating water flow in the rotor cavity.

[0057] The inlet of the impeller assembly is a negative pressure zone. After the liquid is accelerated by the impeller, it becomes pressurized, making the rear end of the impeller assembly a high-pressure zone. When the pump is working, the impeller is located between the high and low pressure zones. Under the influence of the pressure difference, it generates an axial thrust from the high-pressure zone to the negative pressure zone. This axial thrust acts on the ceramic shaft, causing the ceramic shaft 206 to move axially. Because ceramic bearings have low tensile strength, this axial movement of the ceramic shaft will cause damage to it.

[0058] The present invention uses a thrust bearing to prevent the ceramic shaft 206 from moving axially under axial thrust, thereby extending the service life of the ceramic shaft 206.

[0059] See Figure 4 The front ceramic bearing 208 includes a ceramic sliding bearing 2081 that supports the ceramic rotating shaft 206, a limiting member 2083 that is fixedly installed on the ceramic rotating shaft 206, and a limiting sliding assembly 2082 installed between the ceramic sliding bearing 2081 and the limiting member 2083.

[0060] One end of the limiting sliding assembly 2082 is fixedly connected to the limiting member 2083, and the other end is in sliding contact with the ceramic sliding bearing 2081. The outer side of the ceramic sliding bearing 2081 is fixedly connected to the annular end 211 of the front bearing bracket 210. The thrust bearing 208 of this invention utilizes the limiting effect of the annular end 211 of the front bearing bracket 210 and the limiting member 8083 to prevent the ceramic shaft 206 from moving towards the negative pressure area, that is, to prevent the ceramic bearing 206 from... Figure 4 The ceramic bearing 206 moves to the right from the left. That is, when the ceramic bearing 206 moves to the right under the action of axial thrust, the limiting member 2083 fixed on the ceramic bearing 206 contacts the ceramic sliding bearing 2081 through the limiting sliding assembly 2082. Since the ceramic sliding bearing 2081 cannot move under the support of the front bearing bracket 210, it prevents the ceramic shaft 206 from moving to the right.

[0061] because Figure 4 The rear ceramic bearing 205 shown also has the same structure as the front ceramic bearing 208, but in the opposite direction, thus preventing the ceramic shaft 206 from moving to the left.

[0062] Figure 4 The limiting component 2083 shown can be a rubber limiting component, and the limiting sliding component 2082 can be a graphite ring.

[0063] The impeller shaft 302 is a stainless steel shaft that is fitted onto the ceramic shaft 206 via a hot-pressing process. The impeller assembly includes at least two impeller units.

[0064] See Figure 7Each impeller unit consists of an impeller 301 and a guide plate 300. The impeller 301 is movably fitted onto the impeller shaft 302, and the guide plate 300 is fixedly connected to the pipe sleeve 100. The impeller shaft 302 of this invention is a hexagonal stainless steel shaft. The diameter of the central hole of the guide plate 300 is larger than the outer diameter of the impeller shaft 302, and therefore it does not rotate with the rotation of the impeller shaft. The impeller 301 of this invention is a component with an internal spiral water flow channel and has a shape adapted to the hexagonal stainless steel shaft, thus it can rotate with the rotation of the impeller shaft. Simultaneously, there is a gap between the impeller 301 and the impeller shaft 302, allowing it to move axially. This design of the present invention can reduce the axial force exerted by the impeller 301 on the impeller shaft and can also avoid the tolerance fit of fixing the impeller 301 to the impeller shaft. See also Figure 7 The rear end of the impeller 301 and the guide vanes of the guide plate 300 together form a guide vane cavity, which is used to rectify the water flow with different directions formed after the impeller rotates, so that the water flow output by each impeller unit tends to be consistent.

[0065] The inverter assembly 104 of the present invention, used for controlling the operation of a motor, enables the motor rotor to gradually increase from low speed to high speed, achieving a soft start for the ceramic shaft 20 and avoiding start-up breakage due to the weak shock resistance of the ceramic shaft 20. The inverter assembly 104 of the present invention is a power supply device that converts direct current into alternating current with a variable frequency. To avoid the technical problem of start-up breakage due to the weak shock resistance of the ceramic shaft 20, the present invention achieves this by gradually changing the inverter frequency from low to high, thus transitioning the ceramic shaft 20 from low-speed to high-speed rotation.

[0066] Figure 4 The diagram shows the water flow direction of the silent booster water pump of the present invention. The water flow from the water pump inlet 105 is pressurized by the impeller assembly, and then passes through the heat dissipation channel between the stainless steel sleeve 100 and the motor housing 202 or the external water flow channel 600 to reach the outlet pipe 400.

[0067] Figure 8 The diagram shows an outer water flow channel 600 formed between the stainless steel sleeve 100 and the motor housing 202, and an inner water flow channel formed between the stator shielding sleeve 2091 and the rotor shielding sleeve 2092. The outer water flow channel 600 is used to cool the outer side of the motor stator, and the inner water flow channel is used to cool the inner side of the motor stator and the rotor. This invention can greatly improve heat dissipation efficiency by cooling the inner and outer sides of the motor stator and the motor rotor.

[0068] The entire rotor of this invention is placed in a liquid using two sliding bearings, one at the front and one at the rear. The liquid flows from the high-pressure zone of the impeller outer diameter of the front cover through the gap between the stator and rotor shielding sleeves, cooling the inner diameter of the stator. Then, the liquid enters the central hole of the rotor shaft through the rear ceramic bearing and circulates to the negative pressure zone of the impeller inlet ring, forming a cycle. This cyclical cooling of the rotor in the liquid and the stator tightly attached to the stainless steel rotor shielding sleeve rapidly removes the heat generated by the stator and rotor under load. Another external stator cooling channel involves liquid from the pump inlet being pressurized by the impeller and flowing through the stator housing before exiting from the pump outlet, carrying away the heat generated by the stator under load. In this way, the heat generated by the stator and rotor is rapidly removed by the liquid flowing through both internal and external channels, achieving optimal cooling. The temperature of this motor remains essentially the same as the liquid temperature. The electromagnetic wire density and stator lamination magnetic density of this motor are three times higher than those of ordinary external cooling channels, saving two-thirds of the effective material, and twice as high as those of internal stator cooling channels, saving half of the effective material.

[0069] In summary, the pipeline-type silent intelligent booster pump of this invention also has the following technical features: 1. It uses low DC voltage to power the inverter, so that even if the motor submerged in the pipeline leaks electricity, it will not endanger personal safety. 2. It adopts a stainless steel shielding design for the motor stator and rotor to eliminate mechanical seals and reduce maintenance costs. 3. The motor uses a ceramic shaft with ceramic sliding bearings. When the shaft rotates at high speed, a water film forms between the ground ceramic shaft and the ceramic sliding bearing, reducing bearing noise. 4. The inverter controls the rotor's soft start followed by acceleration, solving the problem of ceramic shaft breakage during startup due to its weak impact resistance, and achieving stable high load and high speed of the ceramic shaft. 5. The pump shaft adopts a hot-pressing nesting process of ceramic shaft and stainless steel shaft. The ceramic round shaft serves as the motor rotor shaft, and the stainless steel shaft uses a hexagonal shaft to fit with the impeller shaft hole, solving the problem of not being able to fit the impeller shaft hole by machining the ceramic shaft. 6. A clearance fit design between the hexagonal stainless steel shaft and the impeller shaft hole is adopted, allowing the impeller to move freely axially. The axial movement range of the impeller is limited by the ceramic washer on the guide plate and the 304 stainless steel cover plate. When the rotor rotates, it will not be subjected to axial force caused by the pressure difference before and after the impeller, and only radial torque is provided to the impeller. 7. The motor stator and inverter are completely enclosed in a stainless steel shielding sleeve, allowing the motor to be installed inside the pipeline. Water flows through the outside of the motor, achieving overall heat dissipation for the motor and controller, improving the motor power density, and reducing the motor size. 8. A single-phase valve with an integrated magnet is used and installed in the outlet pipe. When the one-way valve is closed, the plunger drives the magnet to reset. The magnet reset can be sensed by a magnetic sensing element outside the outlet pipe, realizing automatic shutdown of the electric pump. 9. This patent highly integrates the permanent magnet motor, pump, sensor, and inverter into a single "pipeline". It is small in size, and the inlet and outlet are on the same horizontal line. It can be directly installed along the water supply pipeline without the need for adapter fittings, saving space, and achieving intelligent constant pressure control.

[0070] Although the present invention has been described in detail above, it is not limited thereto, and those skilled in the art can make various modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood to fall within the protection scope of the present invention.

Claims

1. A pipeline-type silent intelligent booster water pump, comprising: The inlet and outlet pipes are installed at both ends of the pipe sleeve; An impeller assembly installed inside a pipe sleeve and facing the water inlet; A water pump motor is installed inside the pipe sleeve to drive the impeller assembly to rotate. The rotor chamber of the water pump motor is connected to the outlet of the impeller assembly; as well as A motor cooling structure used to simultaneously dissipate heat from the outside of the motor stator, the inside of the motor stator, and the motor rotor.

2. The pipeline-type silent intelligent booster water pump according to claim 1, wherein, The motor heat dissipation structure includes: A shielding sleeve assembly installed between the rotor and the inner side of the stator of a water pump motor to prevent water from entering the stator; The shielding sleeve assembly is made of a non-magnetic heat dissipation material that can form an internal water flow channel, and is used to dissipate heat on the inside of the motor stator and the motor rotor by using the water flow pumped in from the outlet of the impeller assembly.

3. The pipeline-type silent intelligent booster water pump according to claim 2, wherein, The shielding sleeve assembly consists of a stator shielding sleeve and a rotor shielding sleeve, and there is a gap between the stator shielding sleeve and the rotor shielding sleeve to form the internal water passage. The stator shielding sleeve and the motor housing enclose the stator cavity, and the rotor shielding sleeve encloses the rotor cavity.

4. The pipeline-type silent intelligent booster water pump according to claim 2 or 3, wherein, The motor heat dissipation structure also includes: The external water flow channel formed between the motor housing and the pipe sleeve is used to dissipate heat from the outside of the motor stator by the water flow from the impeller assembly to the outlet pipe through the motor housing.

5. The pipeline-type silent intelligent booster water pump according to claim 2, wherein, One end of the shielding sleeve assembly is connected to the external water passage, and the other end of the shielding sleeve assembly is connected to the rotor cavity.

6. The pipeline-type silent intelligent booster water pump according to claim 1, The feature is that it also includes: An inverter assembly for providing variable frequency power to the water pump motor is installed inside the pipe sleeve. A one-way valve assembly installed in the outlet pipe has an automatic pump shutdown control device for stopping the inverter assembly from supplying power to the pump motor when the one-way valve assembly performs a closing operation.

7. The pipeline-type silent intelligent booster water pump according to claim 1, wherein, The rotor cavity of the water pump motor is equipped with: Ceramic shaft used as a water pump motor shaft; The ceramic bearing supporting the ceramic shaft; and Rotor assembly mounted on the ceramic shaft.

8. The pipeline-type silent intelligent booster water pump according to claim 7, wherein, The ceramic bearing includes a front ceramic bearing and a rear ceramic bearing, and a front bearing bracket for supporting the front ceramic bearing is installed between the front ceramic bearing and the front cover of the water pump motor.

9. The pipeline-type silent intelligent booster water pump according to claim 8, wherein, The front and rear ceramic bearings have gaps between themselves and the ceramic shaft to allow a small amount of water to flow through the rotor cavity. This gap is used to form a water film between the front and rear ceramic bearings and the ceramic shaft when the shaft rotates at high speed, thereby reducing bearing noise.

10. The pipeline-type silent intelligent booster water pump according to claim 1, wherein, The impeller assembly includes at least one impeller unit, each impeller unit consisting of an impeller and a guide plate, the impeller being movably sleeved on the impeller shaft, and the guide plate being fixedly connected to the pipe sleeve.

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