High-performance clean water submersible pump and control method thereof

Abstract

The application discloses a high-performance clear water submersible pump and a control method thereof, and relates to the technical field of submersible pumps. The control method of the high-performance clear water submersible pump comprises the following steps: acquiring a current extrusion value between a dynamic ring and a static ring; determining whether the current extrusion value between the dynamic ring and the static ring is less than or equal to a preset pressure value; controlling a lubricating driving assembly to drive lubricating liquid in a containing cavity to enter a sealing groove; acquiring a current pressure value of the lubricating liquid in the sealing groove; determining whether the current pressure value is greater than or equal to a preset pressure value; and controlling the lubricating driving assembly to stop driving the lubricating liquid, so that part of the lubricating liquid returns to the containing cavity under the pressure between the dynamic ring and the static ring. The technical scheme of the application is beneficial to the lubrication of the dynamic ring and the static ring, and improves the service life of the dynamic ring and the static ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submersible pump sealing, in particular to a high-performance clean water submersible pump and a control method thereof. BACKGROUND

[0002] The submersible pump is used for pumping water, and is usually arranged underwater during operation.

[0003] The pump body of the submersible pump has a pumping cavity and a motor cavity, and the pumping cavity is in communication with the motor cavity, so that the rotating shaft of the motor can extend into the pumping cavity from the motor cavity. In order to prevent water in the pumping cavity from entering the motor cavity, a dynamic ring is usually fixedly arranged on the rotating shaft, and a static ring is arranged on the pump body, and the static ring and the dynamic ring are sealed to prevent water in the pumping cavity from entering the motor cavity. However, the existing sealing structure cannot lubricate the static ring and the dynamic ring, and the dynamic ring and the static ring cannot be lubricated under the high-speed rotation of the dynamic ring with the rotating shaft, which causes the service life of the dynamic ring and the static ring to be reduced. SUMMARY

[0004] The main purpose of the present application is to provide a control method of a high-performance clean water submersible pump, which aims to solve the technical problem that the dynamic ring and the static ring cannot be lubricated during sealing.

[0005] To achieve the above-mentioned purpose, the control method of the high-performance clean water submersible pump comprises:

[0006] The pump body and the pumping assembly, the pump body has a motor cavity and a pumping cavity in communication with each other, the pumping cavity is configured to pump water, the pumping assembly comprises a pumping motor arranged in the motor cavity, and a rotating shaft connected to the pumping motor, one end of the rotating shaft is arranged in the pumping cavity away from the pumping motor;

[0007] The sealing assembly comprises a dynamic ring and a static ring, the dynamic ring comprises a connecting barrel, a dynamic ring body and a first sealing ring, the connecting barrel is fixedly connected with the rotating shaft, the dynamic ring body is fixedly connected with the connecting barrel, the dynamic ring body has elasticity, and the first sealing ring is arranged on one side of the dynamic ring body; the static ring is sleeved on the rotating shaft corresponding to the first sealing ring, and the static ring covers the position where the motor cavity and the pumping cavity are in communication, the static ring has a sealing groove and a containing cavity in communication with each other, the sealing groove corresponds to the first sealing ring, and the sealing groove is arranged in a ring shape, the sealing groove and the first sealing ring are in sealing cooperation, so that the dynamic ring and the static ring seal the motor cavity and the pumping cavity, and the motor cavity and the pumping cavity are independent of each other, and the containing cavity is configured to contain lubricating liquid;

[0008] A pressure sensor is arranged in the sealing groove and corresponds to a side of the first sealing ring away from the dynamic ring body, and the pressure sensor is used to measure the pressure of the first sealing ring pressed towards the dynamic ring; a lubrication driving assembly is arranged in the containing cavity to drive the lubricating liquid in the containing cavity to enter the sealing groove to lubricate the first sealing ring and the sealing groove;

[0009] The control method of the high-performance clear water submersible pump comprises:

[0010] A current pressing value between the dynamic ring and the static ring is obtained; and it is determined that the current pressing value between the dynamic ring and the static ring is less than or equal to a preset pressure value.

[0011] The lubrication driving assembly is controlled to drive the lubricating liquid in the containing cavity to enter the sealing groove.

[0012] A current pressure value of the lubricating liquid in the sealing groove is obtained; it is determined that the current pressure value is greater than or equal to a preset pressure value; and the lubrication driving assembly is controlled to stop driving the lubricating liquid.

[0013] Optionally, before the step of obtaining the current pressing value between the dynamic ring and the static ring, the method further comprises: obtaining a working state of the pumping motor, and determining that the pumping motor is in a shutdown state; and / or,

[0014] Before the step of obtaining the current pressure value of the lubricating liquid in the sealing groove, the method further comprises: obtaining a working state of the pumping motor, determining that the pumping motor is in a shutdown state, controlling the lubrication driving assembly to continuously drive the lubricating liquid in the containing cavity to enter the sealing groove, determining that the pumping motor is started, and closing the lubrication driving assembly.

[0015] Optionally, the static ring has a communication port communicating the sealing groove and the containing cavity, and the static ring further has a pressure balance hole communicating the containing cavity and an external space, and the pressure balance hole is arranged on a side of the static ring away from the communication port.

[0016] The lubrication driving assembly comprises a linear stepper motor and a push ring, the push ring is movably arranged in the sealing groove, and the push ring is located between the pressure balance hole and the communication port, and the push ring is used to push the lubricating liquid to flow towards the communication port; the linear stepper motor is arranged in the sealing groove, and the linear stepper motor is connected with the push ring, so that the linear stepper motor can drive the push ring to push the lubricating liquid to flow towards the communication port.

[0017] Optionally, the static ring comprises a static ring body, and a second sealing ring arranged on a side of the static ring body facing the dynamic ring, the second sealing ring wraps the circumferential wall of the dynamic ring body, and the inner side surface of the second sealing ring is in surface contact with the circumferential wall surface of the static ring body to seal the gap between the static ring and the dynamic ring.

[0018] Optionally, the first sealing ring is a trapezoidal ring, the bottom of the trapezoidal ring is connected with the dynamic ring body, and the sealing groove is arranged in an inverted trapezoidal shape, so that when the first sealing ring moves towards the static ring, the side surface of the first sealing ring is in surface contact with the wall surface of the sealing groove.

[0019] Optionally, the control method of the high-performance clean water submersible pump further comprises a limiting cover connected with the second sealing ring, and a side of the limiting cover facing the static ring corresponds to the dynamic ring body, so that when the dynamic ring body deforms, the limiting cover can limit the deformation amplitude of the dynamic ring body to limit the separation of the inner side surface and the circumferential wall surface.

[0020] Optionally, the number of the first sealing rings is multiple, and the multiple first sealing rings are arranged at intervals along the radial direction of the dynamic ring body.

[0021] The number of the sealing grooves is multiple, and the multiple sealing grooves are arranged at intervals along the radial direction of the static ring.

[0022] Optionally, the static ring has a fluid channel, one end of the fluid channel communicates with the containing cavity, and the other end communicates with the sealing groove, so that the lubricating liquid can enter and exit the containing cavity through the fluid channel.

[0023] Optionally, the static ring further has a pressure relief groove, the pressure relief groove is annular, and the sealing groove communicates with the pressure relief groove.

[0024] The control method of the high-performance clean water submersible pump further comprises an elastic ring arranged in the pressure relief groove, so that the lubricating liquid in the sealing groove can enter the pressure relief groove to compress the elastic ring to release the hydraulic pressure of the lubricating liquid in the sealing groove.

[0025] To achieve the above-mentioned purpose, the application further provides a high-performance clean water submersible pump, which comprises a memory, a processor, and a control method for realizing the high-performance clean water submersible pump stored in the memory, the memory is used for storing the program for realizing the control method of the high-performance clean water submersible pump, and the processor is used for executing the program for realizing the control method of the high-performance clean water submersible pump to realize the steps of the control method of the high-performance clean water submersible pump.

[0026] The control method of the high-performance clean water submersible pump has the following advantages. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without any creative effort.

[0028] Figure 1 It is an internal structure diagram of the pump body of the control method of the high-performance clean water submersible pump.

[0029] Figure 2 It is an assembly structure diagram from one perspective of the control method of the high-performance clean water submersible pump.

[0030] Figure 3 It is an explosion structure diagram of the control method of the high-performance clean water submersible pump.

[0031] Figure 4 It is another assembly structure diagram from another perspective of the control method of the high-performance clean water submersible pump.

[0032] Figure 5 It is a sectional structure diagram at A-A in the control method of the high-performance clean water submersible pump. Figure 4

[0033] It is a local enlarged view at I in the control method of the high-performance clean water submersible pump. Figure 6 Figure 5

[0034] Figure 7 Figure 5 ​​​Enlarged view of a section at point II;

[0035] Figure 8 This is a schematic diagram of the static ring structure of the control method for the high-performance submersible water pump of the present invention;

[0036] Figure 9 This is a schematic diagram of the dynamic ring structure of the control method for the high-performance submersible water pump of the present invention.

[0037] Explanation of icon numbers:

[0038]

[0039]

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] This invention mainly proposes a control method for a high-performance submersible pump for clean water, which is primarily applied to the sealed motor cavity and pumping cavity.

[0045] The following will mainly describe the specific structure of the high-performance submersible water pump.

[0046] Reference Figures 1 to 9 In this embodiment of the invention, the high-performance submersible water pump includes:

[0047] Pump body 4, the pump body 4 having a motor cavity 41 and a water pumping cavity 42 that are interconnected, the water pumping cavity 42 being configured for pumping water;

[0048] A water pumping assembly, the water pumping assembly including a water pumping motor 43 disposed in the motor cavity 41, and a rotating shaft 3 connected at one end to the water pumping motor 43, the end of the rotating shaft 3 away from the water pumping motor 43 being disposed in the water pumping cavity 42;

[0049] A sealing assembly 1 includes a rotating ring 11 and a stationary ring 12. The rotating ring 11 includes a connecting cylinder 113, a rotating ring body 111, and a first sealing ring 112. The connecting cylinder 113 is fixedly connected to the rotating shaft 3, and the rotating ring body 111 is fixedly connected to the connecting cylinder 113. The rotating ring body 111 is elastic. The stationary ring 12 has a sealing groove 121 and a receiving cavity 122 that are interconnected. The sealing groove 121 corresponds to the first sealing ring 112 and is arranged in an annular shape. The sealing groove 121 and the first sealing ring 112 are sealed together so that the rotating ring and the stationary ring seal the motor cavity and the pumping cavity, making the motor cavity and the pumping cavity independent of each other. The receiving cavity 122 is configured to contain lubricating fluid.

[0050] Pressure sensor 5 is disposed in the sealing groove 121 and corresponds to the side of the first sealing ring 112 away from the moving ring body 111. The pressure sensor 5 is used to measure the pressure of the first sealing ring 112 pressing against the moving ring 11.

[0051] A lubrication drive assembly is disposed in the receiving cavity 122 to drive the lubricating fluid in the receiving cavity 122 into the sealing groove 121 to lubricate the first sealing ring 112 and the sealing groove 121.

[0052] The control method for the high-performance submersible water pump includes:

[0053] Obtain the current compression value between the moving ring 11 and the stationary ring 12;

[0054] The current compression value between the moving ring 11 and the stationary ring 12 is determined to be less than or equal to a preset pressure value;

[0055] The lubrication drive assembly is controlled to drive the lubricating fluid in the receiving cavity 122 into the sealing groove 121;

[0056] Obtain the current pressure value of the lubricant in the sealing groove 121;

[0057] The current pressure value is determined to be greater than or equal to the preset pressure value;

[0058] Control the lubrication drive assembly to stop driving the lubricating fluid.

[0059] Specifically, in this embodiment, the submersible pump can take many forms. Taking the pump body 4, pumping assembly, sealing assembly 1, pressure sensor 5 and lubrication drive assembly as an example, the following description will be provided.

[0060] The pump body 4 has a rectangular parallelepiped shape and contains a motor chamber 41 and a pumping chamber 42 that are interconnected. The motor chamber 41 is used to install the pumping motor 43, and the pumping chamber 42 is used to install the impeller of the pump, so that the impeller can rotate in the pumping chamber to draw water. The pump body 4 also has an inlet and an outlet that connect to the pumping chamber 42. The inlet supplies water into the pumping chamber 42, and the outlet discharges the water drawn into the pumping chamber 42. The pumping assembly includes a pumping motor 43 disposed in the motor chamber 41, and a rotating shaft 3 with one end connected to the pumping motor 43 and the other end extending into the pumping chamber 42 and connected to the impeller, so that the pumping motor 43 can drive the impeller to rotate through the rotating shaft 3 to pump water.

[0061] The sealing assembly 1 includes a rotating ring 11 and a stationary ring 12. The rotating ring 11 is fixedly mounted on the rotating shaft 3, allowing it to rotate with the shaft 3. The rotating ring 11 can be located in the pumping chamber 42 or the motor chamber 41, etc. This embodiment is described using the position where the motor chamber 41 and the pumping chamber 42 are connected as an example. The rotating ring 11 includes a connecting cylinder 113, a rotating ring body 111, and a first sealing ring 112. The connecting cylinder 113 is fixedly connected to the rotating shaft 3. The rotating ring body 111 is sleeved on the connecting cylinder 113 and fixedly connected to the connecting cylinder, which is located at the position where the motor chamber 41 and the pumping chamber 42 are connected. The rotating ring body 111 is elastic, allowing it to deform elastically. The material of the rotating ring body 111 is rubber. The first sealing ring 112 is located on the side of the rotating ring body 111 facing the motor chamber 41.

[0062] A stationary ring 12 is fitted onto the rotating shaft 3 and spaced apart from it. The stationary ring 12 is located on the side of the rotating ring 11 facing the motor cavity 41, and it covers the area where the motor cavity 41 and the pumping cavity 42 connect. The stationary ring 12 abuts against the rotating ring 11, allowing them to separate the motor cavity 41 and the pumping cavity 42, thus sealing both and preventing water from entering the motor cavity 41. To further improve the sealing performance of the motor cavity 41 and the pumping cavity 42, the stationary ring 12 has a sealing groove 121 corresponding to the first sealing ring 112. The sealing groove 121 is annular, and its size is approximately equal to that of the first sealing ring 112. This allows the rotating ring 11 to increase its contact area with the stationary ring 12 after the first sealing ring 112 is positioned in the sealing groove 121, thereby improving the sealing effect. To ensure lubrication between the rotating ring 11 and the stationary ring 12 during sealing, the stationary ring 12 is provided with a receiving cavity 122 for accommodating lubricating fluid. The receiving cavity 122 communicates with the sealing groove 121, allowing lubricating fluid to enter the sealing groove 121 from the receiving cavity 122 and lubricate the first sealing ring 112. The communication between the receiving cavity 122 and the sealing groove 121 can be direct or indirect, etc., and no specific limitation is made here. In this embodiment, the lubricating fluid is lubricating oil.

[0063] A lubrication drive assembly is disposed in the receiving cavity 122 to drive the lubricating fluid from the receiving cavity 122 into the sealing groove 121. The lubrication drive assembly can be a cylinder and a piston, with some lubricating fluid disposed in the cylinder. When it is necessary to drive the lubricating fluid into the sealing groove 121, the piston forces the lubricating fluid out of the cylinder, thus allowing the lubricating fluid to enter the sealing groove 121 under the pressure of the receiving cavity 122. The lubrication drive assembly can also be a cylinder and a push ring 21. The output shaft of the cylinder is connected to the push ring 21, and an air inlet is provided on the stationary ring 12. The air inlet is located on the side of the stationary ring 12 away from the sealing groove 121 and the receiving cavity 122. Thus, when the cylinder pushes the lubricating fluid toward the side of the sealing groove 121 and the receiving cavity 122, external air or liquid can enter the receiving cavity 122 to balance the pressure of the receiving cavity 122, allowing the cylinder to push the lubricating fluid into the sealing groove 121.

[0064] To facilitate the measurement of the compressive force between the first sealing ring 112 and the sealing groove 121, a pressure sensor 5 is provided in the sealing groove 121. The pressure sensor 5 corresponds to the side of the first sealing ring 112 away from the moving ring body 111. Thus, when the first sealing ring 112 is pressed against the stationary ring 12, the compressive value between the first sealing ring 112 and the stationary ring 12 can be measured by the pressure sensor 5.

[0065] When lubricating the first sealing ring 112 and the sealing groove 121, the current compression value between the first sealing ring 112 and the sealing groove 121 is first obtained to prevent excessive pressure between the moving ring 11 and the stationary ring 12 from preventing the lubrication drive assembly from driving the lubricant into the sealing groove 121. There are several ways to obtain the current compression value. For example, a pressure sensor 5 can be installed between the moving ring 11 and the stationary ring 12, or a position sensor can be installed on the first sealing ring 112 to calculate the current compression value by measuring the distance the first sealing ring 112 moves relative to the stationary ring 12. After obtaining the current compression value, it is compared with a preset pressure value. If the current compression value is greater than the preset pressure value, the lubrication drive assembly does not drive the lubricant for lubrication. When the current compression value is greater than the preset pressure value, the current compression value can be obtained periodically until it is less than or equal to the preset pressure value, at which point the lubrication drive assembly is controlled to drive the lubricant into the sealing groove 121 for lubrication. After the lubrication drive assembly drives the lubricating fluid into the sealing groove 121, the current pressure value of the sealing groove 121 is acquired. If the current pressure value is less than a preset pressure value, the lubrication drive assembly continues to drive the lubricating fluid into the sealing groove 121 until the current pressure value is greater than or equal to the preset pressure value. This causes the lubricating fluid to retreat into the sealing groove 121 under pressure, thus completing the lubrication of the first sealing ring 112 and the sealing groove 121. There are several ways to acquire the current pressure value; it can be acquired in real time or at regular intervals. The current pressure value can be acquired through the pressure sensor 5.

[0066] The present invention discloses a control method for a high-performance submersible water pump. A connecting cylinder 113 is fixedly mounted on a rotating shaft 3. A rotating ring body 111 is mounted on the connecting cylinder, and a first sealing ring 112 is mounted on one side of the rotating ring body 111. A stationary ring 12 covers the area where the motor cavity 41 and the pumping cavity 42 communicate, and the stationary ring 12 is sleeved on the rotating shaft 3. Simultaneously, the rotating ring 11 and the stationary ring 12 abut against each other, allowing the motor cavity 41 and the pumping cavity 42 to be sealed by the stationary ring 12 and the rotating ring 11. The stationary ring 12 also has a mutually communicating sealing groove 121 and a receiving cavity 122. The receiving cavity 122 is used to hold lubricating fluid, and the sealing groove 121 is sealed to the first sealing ring 112. A lubrication drive assembly is disposed in the receiving cavity 122, allowing the lubricating drive assembly to drive the lubricating fluid in the receiving cavity 122 into the sealing groove 121, lubricating the first sealing ring 112 and the sealing groove 121. During lubrication, the current pressure value between the stationary ring 12 and the rotating ring 11 is first acquired. When the current pressure value is less than or equal to a preset pressure value, the lubrication drive assembly is controlled to perform lubrication. Then, the current pressure value of the lubricating fluid in the sealing groove 121 is acquired. When the current pressure value is greater than a preset pressure value, the lubrication drive assembly is controlled to stop working. In this way, the high-performance clean water submersible pump can be lubricated once after each shutdown, avoiding wear caused by the lack of lubrication between the rotating ring 11 and the stationary ring 12.

[0067] In some examples, before obtaining the current compression value between the moving ring 11 and the stationary ring 12, the method further includes: obtaining the operating status of the pumping motor 43; and determining that the pumping motor 43 is in a stopped state.

[0068] Before obtaining the current compression value between the moving ring 11 and the stationary ring 12, to prevent excessive pressure between the moving ring 11 and the stationary ring 12 due to water pressure in the pumping chamber 42 during operation of the high-performance submersible water pump, which would prevent lubrication of the first sealing ring 112 and the sealing groove 121, it is necessary to first obtain the operating status of the pumping motor 43. When the pumping motor 43 is operating, its operating status can be obtained periodically or in real time. The operating status of the pumping motor 43 can be obtained through a rotation sensor or a position sensor. For example, when using a rotation sensor, it can be connected to the rotating shaft 3, and the operating status of the pumping motor 43 can be obtained through the rotation of the rotating shaft 3. When obtaining the operating status of the pumping motor 43 through a position sensor, the position sensor can be set on the rotating shaft 3, and the position sensor detects whether the rotating shaft 3 is rotating to determine whether the pumping motor 43 is in an operating state. After confirming that the pumping motor 43 is in a stopped state, the pressure between the moving ring 11 and the stationary ring 12 is obtained to prevent the lubrication drive assembly from being unable to smoothly drive the lubricant into the sealing groove 121 when the pumping motor 43 has just stopped and there is a large water pressure in the pumping chamber 42.

[0069] In some examples, before obtaining the current pressure value of the lubricant in the sealing groove 121, the method further includes: obtaining the operating state of the pumping motor 43; determining that the pumping motor 43 is in a powered-off state; controlling the lubrication drive assembly to continuously drive the lubricant in the receiving cavity 122 into the sealing groove 121; determining that the pumping motor 43 is turned on, and turning off the lubrication drive assembly, so that a portion of the lubricant in the sealing groove 121 is returned to the receiving cavity 122 under the pressure between the moving ring 11 and the stationary ring 12.

[0070] Before obtaining the current pressure value of the lubricating fluid in the sealing groove 121, to prevent the pumping motor 43 from starting while the lubrication drive assembly is working, the operating status of the pumping motor 43 can be obtained in real time or periodically. This embodiment uses real-time acquisition of the operating status of the pumping motor 43 as an example. When it is obtained that the pumping motor 43 is in the off state, the lubrication drive assembly continues to operate until the operation of the pumping motor 43 is obtained, or the current pressure value of the lubricating fluid in the sealing groove 121 is obtained to be greater than the preset pressure value, thus preventing the lubrication drive assembly from excessively driving the lubricating fluid into the sealing groove 121.

[0071] In some examples, such asFigures 4 to 6 As shown, the stationary ring 12 has a communication port connecting the sealing groove 121 and the receiving cavity 122. The stationary ring 12 also has a pressure balance hole 123 connecting the receiving cavity 122 and the external space. The pressure balance hole 123 is opened on the side of the stationary ring 12 away from the communication port.

[0072] The lubrication drive assembly includes a linear stepper motor 22 and a push ring 21. The push ring 21 is movably disposed in the sealing groove 121 and is located between the pressure balance hole 123 and the communication port. The push ring 21 is used to push the lubricant to flow towards the communication port. The linear stepper motor 22 is disposed in the sealing groove 121 and is connected to the push ring 21 so that the linear stepper motor 22 can drive the push ring 21 to push the lubricant to flow towards the communication port.

[0073] The stationary ring 12 has a connecting port and a pressure balancing hole 123. The connecting port connects the sealing groove 121 and the receiving cavity 122, allowing lubricating fluid to enter and exit the receiving cavity 122. The connecting port is located at one end of the receiving cavity 122. The pressure balancing hole 123 is used to balance the pressure in the receiving cavity 122, allowing external gas or liquid to enter the receiving cavity 122. The pressure balancing hole 123 is located at the end of the stationary ring 12 away from the connecting port.

[0074] The lubrication drive assembly includes a linear stepper motor 22 and a push ring 21. The push ring 21 is positioned between the connecting port and the pressure balance hole 123, and its peripheral wall fits against the inner wall of the receiving cavity 122 to provide efficient lubricant propulsion. The linear stepper motor 22 is a stepper screw motor. To reduce complexity, a through-shaft stepper screw motor is used, meaning the stepper screw motor can drive the output shaft to perform telescopic motion. For example, model 28N34-100-0.5 from Shenzhen Siboshuai Automation Equipment Co., Ltd. The linear stepper motor 22 is positioned on the side of the receiving cavity 122 near the pressure balance hole 123 to facilitate pushing the push ring 21 towards the connecting port. To better propel the push ring 21 within the receiving cavity 122, at least three linear stepper motors 22 are used, spaced apart along the extension direction of the receiving cavity 122. In addition, in order to make full use of the space of the receiving cavity 122, the stationary ring 12 is provided with a mounting slot for installing the linear stepper motor 22, so as to reduce the space occupied by the linear stepper motor 22 in the receiving cavity 122.

[0075] In some examples, such as Figures 4 to 7As shown, the stationary ring 12 includes a stationary ring body 124 and a second sealing ring 125 disposed on the side of the stationary ring body 124 facing the rotating ring 11. The second sealing ring 125 wraps around the peripheral wall of the rotating ring body 111, and the inner side 1251 of the second sealing ring 125 fits against the peripheral wall surface of the stationary ring body 124 to seal the gap between the stationary ring 12 and the rotating ring 11.

[0076] The stationary ring 12 includes a stationary ring body 124 and a second sealing ring 125 disposed on the side of the stationary ring body 124 facing the rotating ring 11. The second sealing ring 125 is adjacent to the edge of the stationary ring body 124 and faces the pumping chamber 42. To improve the sealing performance of the motor cavity 41 and the pumping chamber 42, the stationary ring body 124 is disposed at the position where the motor cavity 41 and the pumping chamber 42 communicate, so that the position where the motor cavity 41 and the pumping chamber 42 communicate is blocked by the stationary ring body 124. After the stationary ring body 124 is disposed at the position where the motor cavity 41 and the pumping chamber 42 communicate, it can be tightly fitted or sealed with glue, etc. The second sealing ring 125 has an inner side surface 1251 facing the middle of the stationary ring 12. The circumferential surface of the rotating ring body 111 has a circumferential wall surface. When the first sealing ring 112 is sealed and engaged with the sealing groove 121, the inner side surface 1251 is in contact with the circumferential wall surface, so that the gap between the rotating ring 11 and the stationary ring 12 can be sealed. When the lubricating fluid in the lubrication drive assembly drives the receiving cavity 122 into the sealing groove 121, the inner side 1251 and the peripheral wall surface cooperate to prevent water from entering the sealing groove 121 through the inner side 1251 and the peripheral wall surface.

[0077] It should be noted that the stationary ring 12 also includes a mounting ring 128. The mounting ring 128 is disposed on the stationary ring body 124, and the outer peripheral wall of the mounting ring 128 protrudes from the outer peripheral wall of the stationary ring body 124. Thus, when the stationary ring 12 is disposed on the pump body 4, the mounting ring 128 covers the position where the motor cavity 41 and the pumping cavity 42 are connected. At the same time, the mounting ring 128 is fixedly connected to the pump body 4.

[0078] In some examples, such as Figure 5 As shown, the first sealing ring 112 is a trapezoidal ring, the bottom of which is connected to the moving ring body 111. The sealing groove 121 is arranged in an inverted trapezoidal shape so that when the first sealing ring 112 moves toward the stationary ring 12, the side of the first sealing ring 112 fits against the wall of the sealing groove 121.

[0079] To better seal the rotating ring 11 and the stationary ring 12, the first sealing ring 112 is a trapezoidal ring, with its bottom connected to the rotating ring body 111. The sealing groove 121 is rectangular, corresponding to the first sealing ring 112. Thus, when the lubrication drive assembly drives the lubricant into the sealing groove 121, the lubricant can fully contact the first sealing ring 112 after the rotating ring 11 moves away from the stationary ring 12, improving the lubrication effect. Because the inner surface 1251 of the second sealing ring 125 is in contact with the peripheral wall of the rotating ring body 111, water can be prevented from entering the sealing groove 121 from the inner surface 1251 and the peripheral wall when the rotating ring 11 moves away from the stationary ring 12. In addition, after the lubricant comes into contact with part of the inner surface 1251, the lubricant can be transferred to the peripheral wall surface through the inner surface 1251. When both the inner surface 1251 and the peripheral wall surface are covered with lubricant, since the viscosity of the lubricant is higher than that of water, the sealing effect between the inner surface 1251 and the peripheral wall surface can be improved.

[0080] In some examples, such as Figure 5 As shown, the control method of the high-performance submersible water pump also includes a limiting cover 6, which is connected to the second sealing ring 125. The side of the limiting cover 6 facing the stationary ring 12 corresponds to the moving ring body 111, so that when the moving ring body 111 deforms, the limiting cover 6 can limit the deformation range of the moving ring body 111, thereby limiting the separation of the inner side surface 1251 from the peripheral wall surface.

[0081] To prevent excessive deformation of the rotating ring body 111 during lubrication of the first sealing ring 112 and the sealing groove 121, which could cause the inner surface 1251 of the second sealing ring 125 to separate from the peripheral wall of the rotating ring body 111, the control method for the high-performance submersible water pump also includes a limiting cover 6. The limiting cover 6 is connected to the second sealing ring 125, and after the limiting cover 6 is connected to the second sealing ring 125, there is a gap between the limiting cover 6 and the rotating ring body 111 when the first sealing ring 112 and the sealing groove 121 are not lubricated. This prevents the rotating ring body 111 from failing to deform when the first sealing ring 112 and the sealing groove 121 are lubricated.

[0082] In some examples, such as Figures 4 to 7 As shown, there are multiple first sealing rings 112, which are arranged radially at intervals along the moving ring body 111; there are multiple sealing grooves 121, which are arranged radially at intervals along the stationary ring 12.

[0083] To further improve the sealing effect, there are multiple first sealing rings 112, which are arranged radially at intervals along the moving ring body 111. Similarly, the number of sealing grooves 121 corresponds to the number of first sealing rings 112, and the positions of the sealing grooves 121 correspond to the positions of the first sealing rings 112, so as to facilitate the sealing fit between the first sealing rings 112 and the sealing grooves 121.

[0084] In some examples, such as Figure 5 As shown, the stationary ring 12 has a fluid channel 126, one end of which is connected to the receiving cavity 122 and the other end is connected to the sealing groove 121, so that the lubricating fluid can enter and exit the receiving cavity 122 through the fluid channel 126.

[0085] For better lubrication, the stationary ring 12 is provided with a fluid channel 126, which connects the receiving cavity 122 and the sealing groove 121. The fluid channel 126 includes a main flow section and a branch flow section. The main flow section includes an L-shaped first section and a second section. The inlet of the main flow section is connected to the end of the receiving cavity 122 facing the moving ring 11. One end of the branch flow section is connected to the main flow section, and the other end is connected to the receiving groove, so that the lubricant in the receiving cavity 122 can enter the sealing groove 121 through the main flow section and the branch flow section.

[0086] In some examples, such as Figure 5 As shown, the stationary ring 12 is also provided with a pressure relief groove, which is annular, and the sealing groove 121 is connected to the sealing groove 121;

[0087] The control method of the high-performance submersible water pump also includes an elastic ring, which is disposed in the pressure relief groove so that the lubricating fluid in the sealing groove 121 can enter the pressure relief groove to compress the elastic ring and relieve the hydraulic pressure of the lubricating fluid in the sealing groove 121.

[0088] The stationary ring 12 also has a ring-shaped pressure relief groove, which communicates with the sealing groove 121 and is located at the bottom of the sealing groove 121. The control method for the high-performance submersible water pump also includes an elastic ring made of silicone, which is positioned within the pressure relief groove. When the lubricating fluid pressure in the sealing groove 121 is high, the lubricating fluid can enter the pressure relief groove and compress the elastic ring to release pressure. When the pressure in the sealing groove 121 is low, the elastic ring drives the lubricating fluid back into the sealing groove 121.

[0089] This invention also proposes a high-performance submersible pump for clean water, which includes a memory, a processor, and a control method stored in the memory for implementing the high-performance submersible pump. The control method for the high-performance submersible pump refers to the above embodiments. Since this high-performance submersible pump adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. The memory is used to store a program for implementing the control method for the high-performance submersible pump; the processor is used to execute the program for implementing the control method for the high-performance submersible pump, thereby implementing the steps of the control method for the high-performance submersible pump.

[0090] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control method for a high-performance submersible water pump, characterized in that, The high-performance submersible water pump includes: The pump body and the pumping assembly are provided. The pump body has a motor cavity and a pumping cavity that are interconnected. The pumping cavity is configured to pump water. The pumping assembly includes a pumping motor disposed in the motor cavity and a rotating shaft connected at one end to the pumping motor. The end of the rotating shaft away from the pumping motor is disposed in the pumping cavity. A sealing assembly includes a rotating ring and a stationary ring. The rotating ring includes a connecting cylinder, a rotating ring body, and a first sealing ring. The connecting cylinder is fixedly connected to the rotating shaft, and the rotating ring body is fixedly connected to the connecting cylinder. The rotating ring body is elastic, and the first sealing ring is disposed on one side of the rotating ring body. The stationary ring is sleeved on the rotating shaft corresponding to the first sealing ring, and the stationary ring covers the position where the motor cavity and the pumping cavity communicate. The stationary ring has a sealing groove and a receiving cavity that communicate with each other. The sealing groove corresponds to the first sealing ring and is annularly arranged. The sealing groove and the first sealing ring are sealed together so that the rotating ring and the stationary ring seal the motor cavity and the pumping cavity, making the motor cavity and the pumping cavity independent of each other. The receiving cavity is configured to contain lubricating fluid. The system includes a pressure sensor and a lubrication drive assembly. The pressure sensor is disposed in the sealing groove and corresponds to the side of the first sealing ring away from the moving ring body. The pressure sensor is used to measure the pressure of the first sealing ring pressing against the moving ring. The lubrication drive assembly is disposed in the receiving cavity and is used to drive the lubricating fluid in the receiving cavity into the sealing groove to lubricate the first sealing ring and the sealing groove. The control method for the high-performance submersible water pump includes: Obtain the current compression value between the moving ring and the stationary ring; determine that the current compression value between the moving ring and the stationary ring is less than or equal to a preset pressure value; The lubrication drive assembly is controlled to drive the lubricating fluid in the receiving cavity into the sealing groove; Obtain the current pressure value of the lubricating fluid in the sealing groove; determine that the current pressure value is greater than or equal to a preset pressure value; control the lubrication drive component to stop driving the lubricating fluid.

2. The control method for the high-performance submersible water pump as described in claim 1, characterized in that, Before the step of obtaining the current compression value between the moving ring and the stationary ring, the method further includes: obtaining the operating status of the pumping motor, and determining that the pumping motor is in a stopped state; and / or, Before the step of obtaining the current pressure value of the lubricating fluid in the sealing groove, the method further includes: obtaining the working status of the pumping motor, determining that the pumping motor is in the off state, controlling the lubrication drive assembly to continuously drive the lubricating fluid in the receiving cavity into the sealing groove, determining that the pumping motor is turned on, and turning off the lubrication drive assembly.

3. The control method for the high-performance submersible water pump as described in claim 1, characterized in that, The stationary ring has a communication port connecting the sealing groove and the receiving cavity, and the stationary ring also has a pressure balance hole connecting the receiving cavity and the external space, the pressure balance hole being opened on the side of the stationary ring away from the communication port; The lubrication drive assembly includes a linear stepper motor and a push ring. The push ring housing is movably disposed in the sealing groove, and the push ring is located between the pressure balance hole and the communication port. The push ring is used to push the lubricant to flow toward the communication port. The linear stepper motor is disposed in the sealing groove and connected to the push ring so that the linear stepper motor can drive the push ring to push the lubricant to flow toward the communication port.

4. The control method for the high-performance submersible water pump as described in claim 1, characterized in that, The stationary ring includes a stationary ring body and a second sealing ring disposed on the side of the stationary ring body facing the rotating ring. The second sealing ring wraps around the peripheral wall of the rotating ring body, and the inner side of the second sealing ring is in contact with the peripheral wall of the stationary ring body to seal the gap between the stationary ring and the rotating ring.

5. The control method for the high-performance submersible water pump as described in claim 4, characterized in that, The first sealing ring is a trapezoidal ring, the bottom of which is connected to the moving ring body. The sealing groove is arranged in an inverted trapezoidal shape so that when the first sealing ring moves toward the stationary ring, the side of the first sealing ring fits against the wall of the sealing groove.

6. The control method for the high-performance submersible water pump as described in claim 4, characterized in that, The control method of the high-performance submersible water pump also includes a limiting cover, which is connected to the second sealing ring. The side of the limiting cover facing the stationary ring corresponds to the moving ring body, so that when the moving ring body deforms, the limiting cover can limit the deformation range of the moving ring body, thereby limiting the separation of the inner side surface from the peripheral wall surface.

7. The control method for the high-performance submersible water pump as described in claim 1, characterized in that, There are multiple first sealing rings, and the multiple first sealing rings are arranged at radial intervals along the moving ring body; There are multiple sealing grooves, and the multiple sealing grooves are arranged at radial intervals along the stationary ring.

8. The control method for the high-performance submersible water pump as described in claim 6, characterized in that, The stationary ring has a fluid channel, one end of which is connected to the receiving cavity and the other end of which is connected to the sealing groove, so that lubricating fluid can enter and exit the receiving cavity through the fluid channel.

9. The control method for the high-performance submersible water pump as described in claim 6, characterized in that, The stationary ring is also provided with a pressure relief groove, which is annular, and the sealing groove is connected to the sealing groove. The control method of the high-performance submersible water pump also includes an elastic ring, which is disposed in the pressure relief groove so that the lubricating fluid in the sealing groove can enter the pressure relief groove and compress the elastic ring to relieve the hydraulic pressure of the lubricating fluid in the sealing groove.

10. A high-performance submersible pump for clean water, characterized in that, The high-performance submersible pump includes a memory, a processor, and a control method for implementing the high-performance submersible pump stored in the memory. The memory is used to store a program for implementing the control method of the high-performance submersible pump. The processor is used to execute the program for implementing the control method of the high-performance submersible pump to implement the steps of the control method of the high-performance submersible pump as described in any one of claims 1 to 9.

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