Piston type water pump of intelligent star-shaped structure

Abstract

The invention provides an intelligent star-structured piston type water pump, which comprises a driving unit, a star-shaped pump body assembly, a sensor assembly, an intelligent control unit and an electric control hydraulic execution unit, and is characterized in that the driving unit comprises a motor and a main shaft coaxially connected with an output shaft of the motor; the star-shaped pump body assembly comprises a pump body shell and a plurality of cylinder sleeves which are evenly arranged in a star shape in the circumferential direction, a piston is arranged in each cylinder sleeve in a sliding fit mode, the axis of each cylinder sleeve points to the main shaft in the radial direction, an inner cavity of each cylinder sleeve forms a working cavity used for sucking in and pressing out media, and a cylinder cover is arranged at the end of each cylinder sleeve. By means of the piston pump, the problems that most existing piston pumps cannot obtain operation data such as single-cylinder-level pressure and temperature, the internal state of a pump cavity is invisible, and accurate control is difficult are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water pumps, in particular to an intelligent star structure piston water pump. BACKGROUND

[0002] In the traditional water supply and fluid conveying system, centrifugal pumps are widely used due to their simple structure and large flow rate, but in the working conditions of high pressure, small flow rate or requiring high volume efficiency, piston water pumps have more obvious advantages. The multi-cylinder piston pump with star structure can obtain larger output pressure and higher specific power in a smaller volume through the uniform arrangement of multiple cylinder sleeves in the circumferential direction, so it has application potential in the fields of high-pressure cleaning, test bench, seawater desalination pretreatment, etc.

[0003] The existing piston water pumps generally adopt crank or eccentric drive structure, the motor drives the main shaft through the shaft coupling, and the eccentric mechanism on the main shaft drives the piston to reciprocate in the cylinder sleeve through the connecting rod, so as to realize the water suction and water compression process.

[0004] Most of the existing piston pumps cannot obtain single-cylinder-level pressure, temperature and other operating data, the internal state of the pump cavity is not visible, and it is difficult to control accurately.

[0005] Therefore, it is necessary to provide a new intelligent star structure piston water pump to solve the above technical problems. SUMMARY

[0006] To solve the above technical problems, the present application provides an intelligent star structure piston water pump, which solves the problem that most of the existing piston pumps cannot obtain single-cylinder-level pressure, temperature and other operating data, the internal state of the pump cavity is not visible, and it is difficult to control accurately.

[0007] The intelligent star structure piston water pump provided by the present application comprises a driving unit, a star pump body assembly, a sensor assembly, an intelligent control unit and an electric control hydraulic execution unit, the driving unit comprises a motor and a main shaft coaxially connected with the output shaft of the motor; The star pump body assembly comprises a pump body shell and a plurality of cylinder sleeves arranged uniformly in a star shape in the circumferential direction, a piston is slidably fitted in each cylinder sleeve, the axis of each cylinder sleeve is radially directed to the main shaft, and the inner cavity of each cylinder sleeve forms a working chamber for sucking and discharging medium; The cylinder sleeve end is provided with a cylinder cover, the cylinder cover is provided with a suction valve communicated with the water inlet chamber and a discharge valve communicated with the water outlet chamber; The main shaft is provided with an eccentric drive mechanism, the sensor assembly at least comprises an in-cylinder pressure sensor arranged on each cylinder cover and a flow sensor arranged on the water outlet manifold, and the pressure measuring end of the in-cylinder pressure sensor is communicated with the corresponding working chamber through a pressure lead channel; The electric control hydraulic execution unit comprises bypass valves and unloading valves arranged in the water outlet main pipe or the discharge channels of the cylinders; The intelligent control unit is electrically connected with the sensor assembly, the motor driver and the electric control hydraulic execution unit respectively. According to the real-time signals of the in-cylinder pressure sensors and the flow sensors, the intelligent control unit comprehensively adjusts the motor rotating speed, the working state of the eccentric driving mechanism and the opening and closing state of the bypass valves and the unloading valves, so as to realize self-adaptive intelligent adjustment of the water pump output pressure and flow.

[0008] In a preferred embodiment, the in-cylinder pressure sensor is installed in a sensor installation cavity outside the cylinder cover, and a micro pressure lead hole extending from the working cavity to the sensor installation cavity is arranged in the cylinder cover; A liquid column is formed in the pressure lead hole to transmit the working cavity pressure to the sensitive surface of the in-cylinder pressure sensor. The in-cylinder pressure sensor is isolated from the working medium by a metal isolation diaphragm and is fixed by screwing or flange structure. The sensor installation cavity and the cable exit are provided with sealing rings and cable compression joints to realize high-pressure sealing and waterproof protection.

[0009] In a preferred embodiment, the sensor assembly further comprises a cylinder body temperature sensor installed on the outer surface of each cylinder sleeve and the outer surface of the pump body shell. An outlet water temperature sensor is arranged on the water outlet main pipe. The intelligent control unit is configured to evaluate the friction heat, cavitation risk and cooling condition according to the change trend of the cylinder body temperature and the outlet water temperature, and take the temperature parameter as a compensation amount for adjusting the motor rotating speed and the water pump load.

[0010] In a preferred embodiment, an electromagnetic bypass valve communicating with the water inlet cavity is arranged on the discharge channel of each cylinder; The intelligent control unit selectively controls the electromagnetic bypass valves of part of the cylinders to be opened according to the main pipe pressure, the main pipe flow and the pressure waveform characteristics of each cylinder, so that the discharge flow of the corresponding cylinder is returned to the water inlet cavity, and the cylinder is in an idle state without external power, so as to realize cylinder-level flow regulation control by changing the number of cylinders participating in work.

[0011] In a preferred embodiment, the intelligent control unit is pre-installed with a constant pressure water supply control program and a constant flow water supply control program. In the constant pressure mode, the outlet water main pipe pressure is taken as the main control amount, and the in-cylinder pressure waveform is taken as the auxiliary amount. Through a double closed loop or a feedforward-feedback composite algorithm, the motor rotating speed and the bypass valve opening degree are adjusted to stabilize the outlet pressure around the set value. In the constant flow mode, the flow signal output by the flow sensor is taken as the main control amount, and the in-cylinder pressure and the motor load current are combined. Through comprehensive scheduling of the displacement and the number of cylinders participating in work, the outlet flow is maintained at the target value, and the energy consumption is automatically optimized when the load changes.

[0012] In a preferred embodiment, the sensor assembly further comprises a vibration or acceleration sensor arranged on the pump body shell, and a motor current detection module arranged on the motor; The intelligent control unit has pre-stored a device health assessment and fault diagnosis program, which is configured to: Determine the abnormality of the suction valve, discharge valve or sealing assembly according to the peak value, rising slope, pressure drop rate and waveform symmetry of the pressure-time curve of each cylinder; Correlate and analyze the frequency spectrum characteristics of the vibration signal with the motor current and temperature change to identify faults such as bearing wear, misalignment or assembly looseness; When it is determined that there is a fault trend such as valve plate sticking, cavitation or sealing leakage, an alarm is issued and the corresponding cylinder load or the overall load of the water pump is automatically reduced to achieve predictive maintenance.

[0013] In a preferred embodiment, the intelligent control unit is provided with a communication module including an Ethernet interface, a serial bus interface and a wireless communication interface; The communication module is used for data interaction with the upper computer or remote monitoring platform, real-time uploading of operating parameters such as cylinder pressure, temperature, vibration, flow, motor current, and receiving of operating mode switching instructions, target pressure / flow setting values and software upgrade data issued remotely, and multiple intelligent star-shaped structure piston water pumps can be connected through the communication module to form a system and realize remote group control scheduling.

[0014] The beneficial effects of the present application are: 1. By arranging an in-cylinder pressure sensor on each cylinder head and a temperature sensor on the outer surface of the cylinder sleeve, the pressure and temperature changes of each working chamber during the entire suction and discharge strokes can be collected in real time, and combined with the outlet flow and pressure signals, multi-level operating state sensing from single cylinder to header can be realized.

[0015] 2. Without changing the basic mechanical structure, through motor speed regulation and cylinder-by-cylinder electromagnetic bypass valve control, both overall flow regulation and step-by-step regulation according to the number of cylinders can be realized, avoiding energy waste caused by simple throttling. In constant pressure or constant flow mode, the control strategy prioritizes the motor to operate in the high efficiency zone, significantly reducing system energy consumption.

[0016] 3. The intelligent control unit can optimize the bypass valve opening and closing time and the motor speed change curve according to the phase and amplitude of the pressure waveform of each cylinder, so that the output pressure of each cylinder is more evenly distributed in time, thereby reducing the total pipe pressure pulsation. When starting and stopping or the load changes suddenly, by gradually opening the bypass valve and unloading valve, the pressure change rate is limited to suppress water hammer.

[0017] 4. This invention comprehensively utilizes multiple signals such as cylinder pressure, temperature, vibration, and motor current to construct an equipment health assessment and fault diagnosis program. It can identify fault signs such as valve plate fatigue, seal leakage, cavitation, and bearing abnormalities online, issue early warnings in the early stages of faults, and automatically take load reduction measures, providing users with predictive maintenance basis and reducing unplanned downtime. Attached Figure Description

[0018] Figure 1 The main structure of the intelligent star-shaped piston water pump provided by this invention is shown in a stereoscopic view. Figure One ; Figure 2 The main structure of the intelligent star-shaped piston water pump provided by this invention is shown in a stereoscopic view. Figure Two ; Figure 3 This is a schematic diagram of the cylinder head structure provided by the present invention; Figure 4 The control system principle block diagram provided by the present invention; The following are the labels in the diagram: 1. Motor; 2. Main shaft; 3. Pump housing; 4. Cylinder liner; 5. Piston; 6. Cylinder head; 7. Eccentric drive mechanism; 8. In-cylinder pressure sensor; 9. Sensor mounting cavity; 10. Miniature pressure lead-out hole; 11. Main outlet pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1 , Figure 2 , Figure 3 as well as Figure 4 ,in Figure 1 The main structure of the intelligent star-shaped piston water pump provided by this invention is shown in a stereoscopic view. Figure One ; Figure 2 The main structure of the intelligent star-shaped piston water pump provided by this invention is shown in a stereoscopic view. Figure Two ; Figure 3 This is a schematic diagram of the cylinder head structure provided by the present invention; Figure 4 The control system principle block diagram provided by the present invention.

[0021] In the specific implementation process, such as Figures 1-4As shown, the device includes a drive unit, a star-shaped pump assembly, a sensor assembly, an intelligent control unit, and an electro-hydraulic actuator. The drive unit comprises a motor 1 and a main shaft 2 coaxially connected to the output shaft of the motor 1. The star-shaped pump assembly includes a pump housing 3 and several cylinder liners 4 evenly arranged in a star shape along the circumferential direction. A piston 5 is slidably fitted inside each cylinder 4, and the axis of each cylinder 4 radially points towards the main shaft 2. The inner cavity of each cylinder 4 forms a working chamber for sucking in and discharging media. A cylinder cover 6 is provided at the end of each cylinder 4, and the cylinder cover 6 contains a suction valve communicating with the inlet chamber and a discharge valve communicating with the outlet chamber. An eccentric drive mechanism 7 is provided on the main shaft 2. The sensor assembly includes at least one sensor assembly... The cylinder head 6 has an in-cylinder pressure sensor 8 and a flow sensor is arranged on the outlet manifold 11. The pressure measuring end of the in-cylinder pressure sensor 8 is connected to the corresponding working chamber through a pressure lead-out channel. The electro-hydraulic actuator includes a bypass valve and an unloading valve installed in the outlet manifold 11 or the discharge channel of each cylinder. The intelligent control unit is electrically connected to the sensor assembly, the motor driver and the electro-hydraulic actuator. The intelligent control unit adjusts the speed of the motor 1, the working state of the eccentric drive mechanism 7 and the opening and closing state of the bypass valve and the unloading valve in a comprehensive manner according to the real-time signals of the in-cylinder pressure sensor 8 and the flow sensor of each cylinder, so as to realize the adaptive intelligent adjustment of the pump output pressure and flow.

[0022] The cylinder pressure sensor 8 is installed in the sensor mounting cavity 9 on the outside of the cylinder head 6. The cylinder head 6 has a miniature pressure outlet hole 10 extending from the working cavity to the sensor mounting cavity 9. A liquid column is formed in the pressure outlet hole 10, which transmits the working cavity pressure to the sensitive surface of the cylinder pressure sensor 8. The cylinder pressure sensor 8 is isolated from the working medium by a metal isolation diaphragm and is fixed by a threaded or flanged structure. The sensor mounting cavity 9 and the cable outlet are equipped with sealing rings and cable clamping joints to achieve high-pressure sealing and waterproof protection. An electromagnetic bypass valve connected to the inlet cavity is installed on the discharge channel of each cylinder. The intelligent control unit selectively controls the opening of the electromagnetic bypass valves of some cylinders according to the main pipe pressure, main pipe flow rate and pressure waveform characteristics of each cylinder, so that the discharge flow of the corresponding cylinder flows back to the inlet cavity, thereby putting the cylinder in an unloaded state where it does not perform external work. This allows for cylinder-level flow regulation control by changing the number of cylinders participating in work.

[0023] The sensor assembly also includes a cylinder block temperature sensor, which is installed on the outer surface of each cylinder liner 4 and the outer surface of the pump housing 3. The outlet water temperature sensor is arranged on the outlet water main pipe 11. The intelligent control unit is configured to assess frictional heating, cavitation risk and cooling status based on the changing trends of cylinder block temperature and outlet water temperature, and use the temperature parameters as compensation for adjusting the speed of motor 1 and the load of water pump.

[0024] The intelligent control unit is pre-installed with constant pressure water supply control program and constant flow water supply control program. In constant pressure mode, the pressure of the main outlet pipe 11 is the main control variable, and the pressure waveform in the cylinder is the auxiliary variable. Through a dual closed loop or feedforward-feedback composite algorithm, the speed of motor 1 and the opening of the bypass valve are coordinated to keep the outlet pressure stable near the set value. In constant flow mode, the flow signal output by the flow sensor is the main control variable. Combined with the cylinder pressure and the load current of motor 1, the outlet flow is maintained at the target value through comprehensive scheduling of displacement and the number of cylinders participating in the work, and energy consumption is automatically optimized when the load changes.

[0025] The sensor assembly also includes a vibration or acceleration sensor mounted on the pump housing 3, and a motor current detection module mounted on the motor 1. The intelligent control unit 19 has a pre-stored equipment health assessment and fault diagnosis program, which is configured to: determine the abnormalities of the suction valve, discharge valve, or sealing assembly based on the peak value, rise slope, pressure drop rate, waveform symmetry, and other characteristics of the pressure-time curve of each cylinder; perform correlation analysis between the spectral characteristics of the vibration signal and the current and temperature changes of the motor 1 to identify faults such as bearing wear, alignment deviation, or assembly loosening; and issue an alarm and automatically reduce the load of the corresponding cylinder or reduce the overall load of the water pump when it is determined that there is a fault trend such as valve plate jamming, cavitation, or seal leakage, thereby achieving predictive maintenance.

[0026] The intelligent control unit is equipped with a communication module, which includes an Ethernet interface, a serial bus interface, and a wireless communication interface. The communication module is used to interact with the host computer or remote monitoring platform, upload operating parameters such as pressure, temperature, vibration, flow rate, and motor current of each cylinder in real time, and receive remotely issued operating mode switching commands, target pressure / flow rate setpoints, and software upgrade data. Multiple intelligent star-shaped piston pumps can be connected in parallel through the communication module to achieve remote group control and scheduling.

[0027] Example 1 Motor 1 drives main shaft 2 to rotate via coupling. An eccentric drive mechanism 7 is installed in the middle or at both ends of main shaft 2. The eccentric drive mechanism 7 is an eccentric wheel and connecting rod structure used to convert the rotational motion of the main shaft into the reciprocating motion of piston 5. Cylinder liners 4 are evenly arranged along the circumference, with their axes pointing towards the center of the main shaft, forming a star-shaped structure. A piston 5 is slidably fitted inside each cylinder liner 4. One end of the piston 5 is connected to the eccentric drive mechanism 7, and the other end extends into the working chamber of the cylinder liner.

[0028] A cylinder head 6 is located at the end of the cylinder liner 4 furthest from the eccentric drive mechanism. The cylinder head 6 contains an intake valve communicating with the water inlet chamber and a discharge valve communicating with the water outlet chamber. The water inlet chamber is connected to an external water inlet pipe, and the water outlet chamber is connected to the main water outlet pipe 9 via an internal channel. To achieve real-time pressure measurement of each working chamber, a miniature pressure lead-out hole 10 is machined at the eccentric position of the cylinder head 6. One end of the pressure lead-out hole 10 communicates with the working chamber, and the other end leads to the outside of the cylinder head 6, forming a sensor mounting cavity 9. The internal pressure sensor 8 is installed in this mounting cavity, with its sensitive surface facing the port of the pressure lead-out hole 10, and the pressure signal is transmitted through a liquid column. The internal pressure sensor 8 is isolated from the working medium by a metal diaphragm, and is installed using threaded or flanged clamping, with a sealing ring to achieve high-pressure sealing.

[0029] Cylinder temperature sensors are attached or embedded on the outer surface of each cylinder liner 4 or the outer surface of the pump housing 3 to monitor cylinder temperature changes. An outlet water temperature sensor and a flow sensor are installed on the main outlet pipe 9 to monitor the medium temperature and overall flow rate. Vibration or acceleration sensors are arranged on the outer surface of the pump housing 3, and a motor current detection module and temperature sensor are arranged on the motor windings or end caps. Sensor signals are led out to the intelligent control unit 19 inside the control cabinet via shielded cables.

[0030] While maintaining the high pressure and high specific power characteristics of the star-shaped multi-cylinder piston pump, the above structure enables real-time acquisition of multi-dimensional information such as single-cylinder pressure, temperature, equipment vibration, and motor load, providing a data foundation for subsequent intelligent control and fault diagnosis.

[0031] Example 2 The intelligent control unit 19 uses an industrial controller or embedded processor to control the motor 1 driver, the solenoid bypass valve, and the unloading valve. The control program has two preset operating modes: constant pressure and constant current, which users can select and switch between via a human-machine interface or host computer commands.

[0032] In constant pressure mode, the pressure signal from the main outlet pipe 9 is used as the main feedback quantity. The controller adopts a dual closed-loop structure: the outer loop is a pressure closed loop, and the inner loop is a motor speed closed loop. The outer loop calculates the target speed or speed correction amount based on the pressure deviation, and the inner loop adjusts the motor driver output based on the target speed to achieve fast and stable pressure control.

[0033] The single-cylinder pressure waveform provided by the in-cylinder pressure sensor 8 is used to assist in correcting control parameters. For example, when it is detected that the pressure peak of some cylinders during the discharge stroke is significantly higher than that of other cylinders, the controller can appropriately open the solenoid bypass valves of these cylinders, allowing part of their flow to flow back to the inlet chamber, thereby balancing the load of each cylinder and reducing pressure pulsation.

[0034] In constant flow mode, the flow signal output by the flow sensor is the primary control variable, while the pressure signal and motor current signal are auxiliary variables. The controller calculates the target motor speed based on the flow deviation and determines whether to reduce the number of cylinders involved in the work based on the pressure waveform of each cylinder and the motor load.

[0035] When the system load is light and the required flow rate is small, the controller can close the discharge channel of some cylinders and open their solenoid bypass valves while keeping the motor speed in the high-efficiency range, so that the cylinder is in an unloaded circulation state, thereby reducing energy consumption while reducing output flow rate.

[0036] During startup, the controller first keeps motor 1 running at a low speed and opens some bypass valves or unloading valves to allow the water pump to vent and fill under low pressure and low load conditions. After the cylinder pressure stabilizes, the bypass or unloading valves are gradually closed, and the speed of motor 1 is increased at a set slope to allow the system pressure to rise smoothly and avoid severe water hammer. The shutdown process follows the reverse steps to allow the pressure to drop slowly.

[0037] Through the above control strategy, this embodiment can achieve stable pressure and flow control under various operating conditions, while taking into account both energy utilization efficiency and equipment safety.

[0038] Example 3 Based on Examples 1 and 2, this example illustrates the device health assessment and remote monitoring functions in the intelligent control unit.

[0039] The control unit periodically extracts features from the pressure-time curves of each cylinder, including peak value, rise time, pressure drop rate, waveform symmetry, and periodic stability. Simultaneously, it statistically analyzes parameters such as cylinder temperature, outlet water temperature, vibration RMS value and spectrum, motor current waveform, and temperature. By comparing these parameters with the initial "health data" or historical data from long-term operation, the control unit automatically calculates the health indicators of each component.

[0040] When a cylinder experiences abnormally deep negative pressure, increased pressure oscillation frequency, or abnormally high temperature during the intake phase, the control unit determines that the cylinder may have a risk of air intake or cavitation, automatically reduces the motor speed, and prompts the user to check the inlet filter and liquid level. When a cylinder experiences a decrease in pressure peak value, a more pronounced curve tail, or a slower pressure recovery rate during the discharge phase, it is determined that there may be a leak in its discharge valve or seals, and the control unit may temporarily reduce the load on that cylinder or suggest maintenance.

[0041] All operational data, alarm records, and maintenance recommendations are uploaded to the host computer or remote monitoring platform via the communication module. Maintenance personnel can view the operating status of multiple water pumps at the monitoring center, switch modes, adjust parameters, and upgrade programs for single or multiple devices, achieving remote management and group control scheduling of the equipment.

[0042] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An intelligent star-shaped piston water pump, characterized in that, The device includes a drive unit, a star-shaped pump body assembly, a sensor assembly, an intelligent control unit, and an electro-hydraulic actuator. The drive unit includes a motor (1) and a main shaft (2) coaxially connected to the output shaft of the motor (1). The star-shaped pump assembly includes a pump housing (3) and several cylinder sleeves (4) arranged in a star shape along the circumferential direction. A piston (5) is slidably fitted inside each cylinder sleeve (4). The axis of each cylinder sleeve (4) points radially toward the main shaft (2). The inner cavity of each cylinder sleeve (4) forms a working chamber for sucking in and discharging media. The cylinder liner (4) is provided with a cylinder cover (6) at its end. The cylinder cover (6) is provided with an intake valve that communicates with the water inlet chamber and a discharge valve that communicates with the water outlet chamber. An eccentric drive mechanism (7) is provided on the main shaft (2). The sensor assembly includes at least an in-cylinder pressure sensor (8) arranged on each cylinder head (6) and a flow sensor arranged on the water outlet main pipe (11). The pressure measuring end of the in-cylinder pressure sensor (8) is connected to the corresponding working chamber through a pressure lead-out channel. The electro-hydraulic actuator includes a bypass valve and an unloading valve installed in the main outlet pipe (11) or the discharge channel of each cylinder; The intelligent control unit is electrically connected to the sensor assembly, the motor driver and the electro-hydraulic actuator respectively. The intelligent control unit comprehensively adjusts the speed of the motor (1), the working state of the eccentric drive mechanism (7) and the opening and closing state of the bypass valve and the unloading valve according to the real-time signals of the pressure sensor (8) and the flow sensor in each cylinder, so as to realize the adaptive intelligent adjustment of the output pressure and flow of the water pump.

2. The intelligent star-shaped piston water pump according to claim 1, characterized in that, The cylinder pressure sensor (8) is installed in the sensor mounting cavity (9) on the outside of the cylinder head (6), and the cylinder head (6) is provided with a miniature pressure lead-out hole (10) extending from the working cavity to the sensor mounting cavity (9). A liquid column is formed inside the pressure outlet hole (10), which transmits the working chamber pressure to the sensitive surface of the cylinder pressure sensor (8). The cylinder pressure sensor (8) is isolated from the working medium by a metal isolation diaphragm and is fixed by a threaded or flanged structure. The sensor mounting cavity (9) and cable outlet are equipped with sealing rings and cable clamping joints to achieve high-pressure sealing and waterproof protection.

3. The intelligent star-shaped piston water pump according to claim 2, characterized in that, The sensor assembly also includes a cylinder temperature sensor, which is installed on the outer surface of each cylinder liner (4) and the outer surface of the pump housing (3). The outlet water temperature sensor is arranged on the outlet main pipe (11). The intelligent control unit is configured to assess frictional heating, cavitation risk and cooling status based on the changing trends of cylinder temperature and outlet water temperature, and use the temperature parameters as compensation for adjusting the speed of the motor (1) and the load of the water pump.

4. The intelligent star-shaped piston water pump according to claim 3, characterized in that, An electromagnetic bypass valve connected to the water inlet chamber is installed on the discharge channel of each cylinder. The intelligent control unit selectively controls the opening of the electromagnetic bypass valves of some cylinders based on the main pipe pressure, main pipe flow rate and pressure waveform characteristics of each cylinder, so that the discharge flow of the corresponding cylinder flows back to the inlet chamber, thereby putting the cylinder in an unloaded state where it does not perform external work, so as to achieve cylinder-level flow regulation control by changing the number of cylinders participating in work.

5. The intelligent star-shaped piston water pump according to claim 4, characterized in that, The intelligent control unit is pre-set with constant pressure water supply control program and constant flow water supply control program. In constant pressure mode, the pressure of the main outlet pipe (11) is the main control quantity and the pressure waveform in the cylinder is the auxiliary quantity. Through double closed loop or feedforward-feedback composite algorithm, the speed of motor (1) and the opening of bypass valve are coordinated to stabilize the outlet pressure near the set value. In constant flow mode, the flow signal output by the flow sensor is the main control quantity. Combined with the cylinder pressure and the motor (1) load current, the outlet flow is maintained at the target value through comprehensive scheduling of displacement and the number of cylinders participating in power operation, and energy consumption is automatically optimized when the load changes.

6. The intelligent star-shaped piston water pump according to claim 5, characterized in that, The sensor assembly also includes a vibration or acceleration sensor arranged on the pump housing (3) and a motor current detection module arranged on the motor (1). The intelligent control unit (19) has a pre-stored equipment health assessment and fault diagnosis program, which is configured as follows: Based on the peak value, rise slope, pressure drop rate, and waveform symmetry of the pressure-time curves of each cylinder, abnormalities in the intake valve, discharge valve, or sealing components can be identified. The spectral characteristics of the vibration signal are correlated with the changes in motor current and temperature to identify faults such as bearing wear, misalignment or loose assembly. When a fault trend such as valve plate jamming, cavitation, or seal leakage is detected, an alarm is issued and the load on the corresponding cylinder or the overall load on the water pump is reduced, thus achieving predictive maintenance.

7. The intelligent star-shaped piston water pump according to claim 6, characterized in that, The intelligent control unit is equipped with a communication module, which includes an Ethernet interface, a serial bus interface and a wireless communication interface. The communication module is used to interact with the host computer or remote monitoring platform to upload operating parameters such as pressure, temperature, vibration, flow rate, and motor current of each cylinder in real time, and to receive remotely issued operating mode switching commands, target pressure / flow rate setpoints, and software upgrade data. Multiple intelligent star-shaped piston water pumps can be connected in parallel through the communication module to achieve remote group control and scheduling.

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