A high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump

Abstract

The present invention relates to the technical field of spiral centrifugal pumps, and in particular to a high-efficiency, energy-saving, uniform-pitch intelligent spiral centrifugal pump, comprising: a delivery module for delivering a medium; a detection module connected to the delivery module, comprising a vibration sensor connected to the pump body for detecting the vibration intensity of the pump body, a noise meter connected to the one-way thrust ball bearing for detecting the noise intensity of the one-way thrust ball bearing, and a temperature sensor connected to the pump body for detecting the temperature of the spiral centrifugal pump; and a control module connected to the delivery module and the detection module, respectively, for determining the motor speed of the spiral centrifugal pump based on the vibration intensity of the pump body, or determining the lubricating oil supply rate based on the noise intensity of the one-way thrust ball bearing, and determining the proportion of the spiral centrifugal pump's operating time per unit time based on the temperature rise rate of the spiral centrifugal pump. The present invention improves the operational stability of the spiral centrifugal pump.

Description

Technical Field

[0001] The present invention relates to the technical field of spiral centrifugal pumps, and in particular to a high-efficiency, energy-saving, equal-pitch intelligent spiral centrifugal pump. Background Art

[0002] At present, the existing non-clogging pumps basically adopt dual-channel and single-channel impellers. When facing some easily entangled objects in the conveying medium, such as woven bags and cotton threads, the impeller is prone to entanglement and clogging, which will lead to poor conveying effect and low efficiency, and cause continuous accumulation of solid impurities, thus forming a vicious circle, resulting in a decrease in the flow rate of the non-clogging pump, an increase in load, and an increase in energy consumption, thereby destroying the normal operation of the non-clogging unit.

[0003] Chinese Patent Publication No.: CN114352542A discloses a high-pressure spiral centrifugal pump, comprising a shell, an output port is provided on the left side surface of the shell, the output port is connected to the material delivery pipeline, a feed port is provided on the lower surface of the shell, a transmission shaft is provided in the shell, a spiral centrifugal wheel is fixedly installed on one end of the transmission shaft, the other end of the transmission shaft passes through the right side surface of the shell and extends to the right side of the shell, a motor is provided on the right side of the shell, and the rotating shaft of the motor is connected to the transmission shaft through a coupling, characterized in that a cam is installed on the transmission shaft, the cam is located between the right side surface of the shell and the coupling, the feed port is connected to the upper end port of the high-pressure chamber, the lower end port of the high-pressure chamber is connected to the upper end port of the feed pipe, and a pressurizing device is installed on the feed pipe, the pressurizing device is located below the cam and is movably connected to the edge of the cam, and the cam drives the pressurizing device to pressurize the high-pressure chamber during rotation. It can be seen that the high-pressure spiral centrifugal pump has the problem that the blade edges of the impeller are eroded and worn during long-term contact with high-speed flowing liquid, resulting in changes in the shape and mass distribution of the blades, thereby reducing the operating stability of the spiral centrifugal pump. Summary of the Invention

[0004] To this end, the present invention provides a high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump to overcome the problem in the prior art that the blade edges of the impeller are eroded and worn during long-term contact with high-speed flowing liquid, resulting in changes in the shape and mass distribution of the blades and thus a decrease in the operating stability of the spiral centrifugal pump.

[0005] To achieve the above-mentioned object, the present invention provides a high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump, comprising: a delivery module for delivering a medium, comprising a pump body, an impeller arranged inside the pump body for providing energy to the medium, a motor coupling connected to the pump body for transmitting motor power, a pump coupling connected to the motor coupling for transmitting the motor power to the spiral centrifugal pump, a one-way thrust ball bearing arranged inside the pump body for bearing axial load, and an oil pump connected to the one-way thrust ball bearing for delivering lubricating oil; a detection module, which is connected to the delivery module, and comprises a detection module connected to the a vibration sensor connected to the pump body for detecting the vibration intensity of the pump body, a noise meter connected to the one-way thrust ball bearing for detecting the noise intensity of the one-way thrust ball bearing, and a temperature sensor connected to the pump body for detecting the temperature of the spiral centrifugal pump; a control module, which is respectively connected to the delivery module and the detection module, and is used to determine the motor speed of the spiral centrifugal pump according to the vibration intensity of the pump body in the spiral centrifugal pump, or to determine the supply rate of lubricating oil according to the noise intensity of the one-way thrust ball bearing, and to determine the proportion of working time of the spiral centrifugal pump per unit time according to the temperature rise rate of the spiral centrifugal pump.

[0006] Furthermore, the control module is used to determine whether the operating stability of the spiral centrifugal pump meets the requirements based on the vibration intensity of the pump body in the spiral centrifugal pump. If the vibration intensity of the pump body in the spiral centrifugal pump is greater than a preset first vibration intensity, it is determined that the operating stability of the spiral centrifugal pump does not meet the requirements.

[0007] Furthermore, when the vibration intensity of the pump body in the spiral centrifugal pump is greater than the preset first vibration intensity and less than or equal to the preset second vibration intensity, the control module preliminarily determines that the operating reliability of the spiral centrifugal pump does not meet the requirements, and determines whether the operating reliability of the spiral centrifugal pump meets the requirements based on the noise intensity of the one-way thrust ball bearing.

[0008] Furthermore, the control module reduces the motor speed of the spiral centrifugal pump when the vibration intensity of the pump body in the spiral centrifugal pump is greater than the preset second vibration intensity;

[0009] The reduction range of the motor speed of the spiral centrifugal pump is determined by the difference between the vibration intensity of the pump body in the spiral centrifugal pump and a preset second vibration intensity.

[0010] Furthermore, the control module is used to determine whether the operating reliability of the spiral centrifugal pump meets the requirements based on the noise intensity of the one-way thrust ball bearing. If the noise intensity of the one-way thrust ball bearing is greater than the preset first noise intensity, it is determined that the operating reliability of the spiral centrifugal pump does not meet the requirements.

[0011] Furthermore, when the noise intensity of the one-way thrust ball bearing is greater than a preset second noise intensity, the control module preliminarily determines that the environmental stability of the spiral centrifugal pump does not meet the requirements, and determines whether the environmental stability of the spiral centrifugal pump meets the requirements based on the temperature rise rate of the spiral centrifugal pump.

[0012] Furthermore, the control module increases the supply rate of lubricating oil when the noise intensity of the one-way thrust ball bearing is greater than the preset first noise intensity and less than or equal to the preset second noise intensity.

[0013] Furthermore, the increase range of the lubricating oil supply rate is determined by the difference between the noise intensity of the one-way thrust ball bearing and a preset first noise intensity.

[0014] Furthermore, the control module is used to determine whether the environmental stability of the spiral centrifugal pump meets the requirements based on the temperature rise rate of the spiral centrifugal pump. If the temperature rise rate of the spiral centrifugal pump is greater than the preset rise rate, it is determined that the environmental stability of the spiral centrifugal pump does not meet the requirements, and the proportion of the working time of the spiral centrifugal pump per unit time is reduced.

[0015] Furthermore, the reduction range of the operating time ratio of the spiral centrifugal pump per unit time is determined by the difference between the temperature increase rate of the spiral centrifugal pump and a preset temperature increase rate.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the spiral centrifugal pump of the present invention determines the motor speed of the spiral centrifugal pump according to the vibration intensity of the pump body in the spiral centrifugal pump by setting a delivery module, a detection module and a control module. During the operation of the spiral centrifugal pump, the blade edge of the impeller may be washed and worn during long-term contact with high-speed flowing liquid. This wear will change the shape and mass distribution of the blade, causing the center of mass position of the impeller to shift, thereby causing imbalance. By reducing the motor speed of the spiral centrifugal pump, the vibration caused by the unbalanced force and the additional load on the shaft system can be reduced, preventing the pump body and the shaft system from being damaged due to excessive vibration, and extending the service life of the equipment. The supply rate of the lubricating oil is determined according to the noise intensity of the one-way thrust ball bearing. Since there are leakage points in the lubricating oil pipeline, the lubricating oil The oil is continuously lost during the circulation process, resulting in the inability to maintain the oil film between the friction surfaces inside the bearing, which leads to direct metal contact and increased friction and wear. By increasing the supply rate of lubricating oil, the loss caused by leakage can be compensated so that there is enough lubricating oil in the bearing to re-form the oil film and improve the lubrication conditions inside the bearing. The working time ratio of the spiral centrifugal pump per unit time is determined according to the temperature rise rate of the spiral centrifugal pump. Since the motor runs at high load for a long time, the heat generated will accumulate, causing the motor temperature to rise, thereby affecting the temperature around the pump body. By reducing the working time ratio of the spiral centrifugal pump per unit time, the motor temperature rise can be reduced, the heat conduction to the pump body can be reduced, the temperature around the pump body can be kept relatively stable, the pump can work in a suitable temperature environment, and the operating stability of the spiral centrifugal pump is improved.

[0017] Furthermore, the spiral centrifugal pump described in the present invention determines the motor speed of the spiral centrifugal pump by setting a preset first vibration intensity and a preset second vibration intensity. During the operation of the spiral centrifugal pump, the blade edges of the impeller may be washed and worn during long-term contact with high-speed flowing liquid. This wear will change the shape and mass distribution of the blades, causing the center of mass position of the impeller to shift, thereby leading to imbalance. By reducing the motor speed of the spiral centrifugal pump, the vibration caused by the unbalanced force and the additional load on the shaft system can be reduced, preventing the pump body and the shaft system from being damaged due to excessive vibration, extending the service life of the equipment, and further improving the operating stability of the spiral centrifugal pump.

[0018] Furthermore, the spiral centrifugal pump described in the present invention determines the supply rate of lubricating oil by setting a preset first noise intensity and a preset second noise intensity. Due to the presence of leakage points in the lubricating oil pipeline, the lubricating oil is continuously lost during the circulation process, resulting in the inability to maintain the oil film between the friction surfaces inside the bearing, thereby causing direct metal contact, increased friction and wear. By increasing the supply rate of lubricating oil, the loss caused by leakage can be compensated, so that there can be sufficient lubricating oil in the bearing to re-form the oil film, improve the lubrication conditions inside the bearing, and further improve the operating stability of the spiral centrifugal pump.

[0019] Furthermore, the spiral centrifugal pump described in the present invention determines the proportion of the working time of the spiral centrifugal pump per unit time by setting a preset increase rate. Since the heat generated when the motor runs at high load for a long time will accumulate, the temperature of the motor will increase, and then affect the temperature around the pump body. By reducing the proportion of the working time of the spiral centrifugal pump per unit time, the amplitude of the motor temperature increase can be reduced, the heat conduction to the pump body can be reduced, the temperature around the pump body can be kept relatively stable, and the pump can operate in a suitable temperature environment, further improving the operating stability of the spiral centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency, energy-saving, equal-pitch intelligent spiral centrifugal pump according to an embodiment of the present invention;

[0021] Figure 2 This is a block diagram of the overall structure of a high-efficiency, energy-saving, equal-pitch intelligent spiral centrifugal pump according to an embodiment of the present invention;

[0022] Figure 3 This is a logic flow chart of the high-efficiency, energy-saving, equal-pitch intelligent spiral centrifugal pump according to an embodiment of the present invention;

[0023] Figure 4 This is a specific structural block diagram of a detection module for an energy-efficient and high-efficiency equal-pitch intelligent spiral centrifugal pump according to an embodiment of the present invention;

[0024] The figures are marked as follows: 1-connecting pipe, 2-front cover, 3-impeller, 4-pump body, 5-mechanical seal cover, 6-mechanical seal, 7-static ring seat, 8-rear cover bearing body, 9-bearing cover, 10-pump coupling, 11-motor coupling, 12-single row cylindrical roller bearing, 13-auxiliary support, 14-stop sleeve, 15-pump shaft, 16-thrust bearing sleeve, 17-one-way thrust ball bearing, 18-thrust bearing seat, 19-spherical roller bearing, 20-horizontal bracket. DETAILED DESCRIPTION

[0025] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] See also Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown in the figure, they are respectively the overall structural diagram, overall structural block diagram, logic flow chart and specific structural block diagram of the detection module of the embodiment of the present invention. The present invention is a high-efficiency and energy-saving equal pitch intelligent spiral centrifugal pump, comprising:

[0030] A conveying module for conveying a medium, comprising a pump body 4, an impeller 3 disposed inside the pump body 4 for providing energy to the medium, a motor coupling 11 connected to the pump body 4 for transmitting motor power, a pump coupling 10 connected to the motor coupling 11 for transmitting the motor power to the spiral centrifugal pump, a one-way thrust ball bearing 17 disposed inside the pump body 4 for bearing an axial load, and an oil pump connected to the one-way thrust ball bearing 17 for conveying lubricating oil;

[0031] a detection module connected to the delivery module, comprising a vibration sensor connected to the pump body 4 for detecting the vibration intensity of the pump body 4, a noise meter connected to the one-way thrust ball bearing 17 for detecting the noise intensity of the one-way thrust ball bearing 17, and a temperature sensor connected to the pump body 4 for detecting the temperature of the spiral centrifugal pump;

[0032] A control module is connected to the delivery module and the detection module respectively, and is used to determine the motor speed of the spiral centrifugal pump according to the vibration intensity of the pump body 4 in the spiral centrifugal pump, or to determine the supply rate of lubricating oil according to the noise intensity of the one-way thrust ball bearing 17, and to determine the proportion of the working time of the spiral centrifugal pump per unit time according to the temperature rise rate of the spiral centrifugal pump.

[0033] Specifically, the conveying module also includes:

[0034] A pipe 1 is connected to the pump body 4 and is used to introduce the medium into the pump body 4;

[0035] A front cover 2 connected to the pump body 4 for sealing the front end of the pump;

[0036] A mechanical seal 6 is provided inside the pump body 4 to prevent leakage of the medium in the pump;

[0037] a mechanical seal 6 cover 5 connected to the mechanical seal 6 to protect the mechanical seal 6;

[0038] a stationary ring seat 7 connected to the mechanical seal 6 for fixing the mechanical seal 6;

[0039] The rear cover bearing body 8 is connected to the one-way thrust ball bearing 17 and is used to support the one-way thrust ball bearing 17;

[0040] A bearing cover 9 connected to the one-way thrust ball bearing 17 to protect the one-way thrust ball bearing 17;

[0041] A pump shaft 15 is disposed inside the pump body 4 and is used to transmit centrifugal power;

[0042] a single-row cylindrical roller bearing 12 connected to the pump shaft 15 to bear radial loads;

[0043] an auxiliary support 13 connected to the pump shaft 15 for supporting the pump shaft 15;

[0044] a stopper sleeve 14 connected to the pump shaft 15 for axially positioning components on the pump shaft 15;

[0045] a thrust bearing sleeve 16 connected to the one-way thrust ball bearing 17 for positioning the one-way thrust ball bearing 17;

[0046] a thrust bearing seat 18 connected to the one-way thrust ball bearing 17 to support the one-way thrust ball bearing 17;

[0047] a spherical roller bearing 19 connected to the pump shaft 15 to bear both radial and axial loads;

[0048] The horizontal support 20 is connected to the pump body 4 and is used to support the entire pump body 4.

[0049] Specifically, the media include municipal drainage, chemical solutions, and industrial wastewater.

[0050] Specifically, the working time ratio of the spiral centrifugal pump is the ratio of the time that the spiral centrifugal pump is in working state per unit time to the entire unit time.

[0051] In practice, the spiral centrifugal pump of the present invention determines the motor speed of the spiral centrifugal pump according to the vibration intensity of the pump body 4 in the spiral centrifugal pump by setting a delivery module, a detection module and a control module. During the operation of the spiral centrifugal pump, the blade edge of the impeller 3 may be washed and worn during long-term contact with the high-speed flowing liquid. This wear will change the shape and mass distribution of the blade, causing the center of mass position of the impeller 3 to shift, thereby causing imbalance. By reducing the motor speed of the spiral centrifugal pump, the vibration caused by the unbalanced force and the additional load on the shaft system can be reduced, preventing the pump body 4 and the shaft system from being damaged due to excessive vibration, and extending the service life of the equipment. The supply rate of the lubricating oil is determined according to the noise intensity of the one-way thrust ball bearing 17. Since there is a leakage point in the lubricating oil pipeline, the lubricating oil is lost during the circulation process. Continuous loss causes the oil film between the friction surfaces inside the bearing to be unable to be maintained, resulting in direct metal contact, increased friction and wear. By increasing the supply rate of lubricating oil, the loss caused by leakage can be compensated, so that there is enough lubricating oil in the bearing to re-form the oil film, and the lubrication conditions inside the bearing are improved. The working time ratio of the spiral centrifugal pump per unit time is determined according to the temperature rise rate of the spiral centrifugal pump. Since the motor runs at high load for a long time, the heat generated will accumulate, causing the motor temperature to rise, and then affecting the temperature around the pump body 4. By reducing the working time ratio of the spiral centrifugal pump per unit time, the amplitude of the motor temperature rise can be reduced, and the heat conduction to the pump body 4 can be reduced, so that the temperature around the pump body 4 can be kept relatively stable, so that the pump can work in a suitable temperature environment, thereby improving the operating stability of the spiral centrifugal pump.

[0052] Specifically, the control module is used to obtain the vibration intensity of the pump body 4 in the spiral centrifugal pump. If the vibration intensity of the pump body 4 in the spiral centrifugal pump is greater than a preset first vibration intensity, it is determined that the operating stability of the spiral centrifugal pump does not meet the requirements.

[0053] Specifically, when the vibration intensity of the pump body 4 in the spiral centrifugal pump is greater than the preset first vibration intensity and less than or equal to the preset second vibration intensity, the control module preliminarily determines that the operating reliability of the spiral centrifugal pump does not meet the requirements, and determines whether the operating reliability of the spiral centrifugal pump meets the requirements based on the noise intensity of the one-way thrust ball bearing 17.

[0054] It can be understood that the three intervals corresponding to the preset first vibration intensity and the preset second vibration intensity correspond to three situations respectively:

[0055] The first interval is when the vibration intensity of the pump body 4 in the spiral centrifugal pump is less than or equal to the preset first vibration intensity, corresponding to the situation where the operating stability of the spiral centrifugal pump meets the requirements;

[0056] The second interval is when the vibration intensity of the pump body 4 in the spiral centrifugal pump is greater than the preset first vibration intensity and less than or equal to the preset second vibration intensity. This corresponds to a leak in the lubricating oil pipeline, causing the lubricating oil to continuously lose during the circulation process. This results in the inability to maintain the oil film between the friction surfaces inside the bearing, resulting in direct metal contact and increased friction and wear.

[0057] The third interval is when the vibration intensity of the pump body 4 in the spiral centrifugal pump is greater than the preset second vibration intensity. Correspondingly, during the operation of the spiral centrifugal pump, the blade edges of the impeller 3 may be washed and worn during long-term contact with high-speed flowing liquid. This wear will change the shape and mass distribution of the blades, causing the center of mass position of the impeller 3 to shift, thereby leading to an unbalanced situation.

[0058] In practice, the preset first vibration intensity is generally selected in the range of [6 mm / s, 8 mm / s], and the preset second vibration intensity is generally selected in the range of [9 mm / s, 11 mm / s].

[0059] Preferably, the preferred embodiment of the preset first vibration intensity is 7 mm / s, and the preferred embodiment of the preset second vibration intensity is 10 mm / s.

[0060] In implementation, the spiral centrifugal pump described in the present invention determines the operating stability of the spiral centrifugal pump by setting a preset first vibration intensity and a preset second vibration intensity, thereby reducing the impact of the reduced operating accuracy of the spiral centrifugal pump due to inaccurate determination of the operating stability of the spiral centrifugal pump, and further improving the operating stability of the spiral centrifugal pump.

[0061] Specifically, the control module reduces the motor speed of the spiral centrifugal pump when the vibration intensity of the pump body 4 in the spiral centrifugal pump is greater than the preset second vibration intensity;

[0062] The reduction range of the motor speed of the spiral centrifugal pump is determined by the difference between the vibration intensity of the pump body 4 in the spiral centrifugal pump and a preset second vibration intensity.

[0063] Specifically, when the difference between the vibration intensity of the pump body 4 in the spiral centrifugal pump and the preset second vibration intensity is within 3 mm / s, the motor speed of the spiral centrifugal pump is reduced to 0.92 times the original speed; when the difference between the vibration intensity of the pump body 4 in the spiral centrifugal pump and the preset second vibration intensity exceeds 3 mm / s, the motor speed of the spiral centrifugal pump is reduced by 100 r / min for every 1 mm / s that exceeds. For example, the difference between the vibration intensity of the pump body 4 in the spiral centrifugal pump and the preset second vibration intensity is 5 mm / s. The current motor speed of the spiral centrifugal pump is 2000 r / min. The reduced motor speed of the spiral centrifugal pump is 2000×0.92-100×2=1640 r / min.

[0064] In implementation, the spiral centrifugal pump described in the present invention determines the motor speed of the spiral centrifugal pump by setting a preset first vibration intensity and a preset second vibration intensity. During the operation of the spiral centrifugal pump, the blade edges of the impeller 3 may be washed and worn during long-term contact with high-speed flowing liquid. This wear will change the shape and mass distribution of the blades, causing the center of mass position of the impeller 3 to shift, thereby causing imbalance. By reducing the motor speed of the spiral centrifugal pump, the vibration caused by the unbalanced force and the additional load on the shaft system can be reduced, preventing the pump body 4 and the shaft system from being damaged due to excessive vibration, extending the service life of the equipment, and further improving the operating stability of the spiral centrifugal pump.

[0065] Specifically, the control module is used to obtain the noise intensity of the one-way thrust ball bearing 17. If the noise intensity of the one-way thrust ball bearing 17 is greater than a preset first noise intensity, it is determined that the operating reliability of the spiral centrifugal pump does not meet the requirements.

[0066] Specifically, when the noise intensity of the one-way thrust ball bearing 17 is greater than the preset second noise intensity, the control module preliminarily determines that the environmental stability of the spiral centrifugal pump does not meet the requirements, and determines whether the environmental stability of the spiral centrifugal pump meets the requirements based on the temperature rise rate of the spiral centrifugal pump.

[0067] It can be understood that the three intervals corresponding to the preset first noise intensity and the preset second noise intensity correspond to three situations respectively:

[0068] The first interval is when the noise intensity of the one-way thrust ball bearing 17 is less than or equal to the preset first noise intensity, corresponding to the situation where the operating reliability of the spiral centrifugal pump meets the requirements;

[0069] The second interval is when the noise intensity of the one-way thrust ball bearing 17 is greater than the preset first noise intensity and less than or equal to the second noise intensity. This corresponds to a leak in the lubricating oil pipeline, which causes the lubricating oil to continuously lose during the circulation process. As a result, the oil film between the friction surfaces inside the bearing cannot be maintained, resulting in direct metal contact and increased friction and wear.

[0070] The third interval is when the noise intensity of the one-way thrust ball bearing 17 is greater than the preset second noise intensity. This corresponds to the situation where when the motor runs at high load for a long time, the heat generated will accumulate, causing the motor temperature to rise, thereby affecting the temperature around the pump body 4.

[0071] In practice, the preset first noise intensity is generally selected from the range of [63dB, 67dB], and the preset second noise intensity is generally selected from the range of [68dB, 72dB].

[0072] Preferably, the preferred embodiment of the preset first noise intensity is 65 dB, and the preferred embodiment of the preset second noise intensity is 70 dB.

[0073] In implementation, the spiral centrifugal pump described in the present invention determines the operating reliability of the spiral centrifugal pump by setting a preset first noise intensity and a preset second noise intensity, thereby reducing the impact of the reduced operating stability of the spiral centrifugal pump due to inaccurate determination of the operating reliability of the spiral centrifugal pump, and further improving the operating stability of the spiral centrifugal pump.

[0074] Specifically, the control module increases the supply rate of the lubricating oil when the noise intensity of the one-way thrust ball bearing 17 is greater than the preset first noise intensity and less than or equal to the preset second noise intensity.

[0075] Specifically, the increase range of the lubricating oil supply rate is determined by the difference between the noise intensity of the one-way thrust ball bearing 17 and a preset first noise intensity.

[0076] Specifically, when the difference between the noise intensity of the one-way thrust ball bearing 17 and the preset first noise intensity is within 5dB, the lubricating oil supply rate is increased to 1.1 times the original; when the difference between the noise intensity of the one-way thrust ball bearing 17 and the preset first noise intensity exceeds 5dB, the lubricating oil supply rate increases by 0.2L / min for every 2dB exceeding. For example, the difference between the noise intensity of the one-way thrust ball bearing 17 and the preset first noise intensity is 9dB, the current lubricating oil supply rate is 2L / min, and the increased lubricating oil supply rate is 2×1.1+0.2×2=2.6L / min.

[0077] In implementation, the spiral centrifugal pump described in the present invention determines the supply rate of lubricating oil by setting a preset first noise intensity and a preset second noise intensity. Due to the presence of leakage points in the lubricating oil pipeline, the lubricating oil is continuously lost during the circulation process, resulting in the inability to maintain the oil film between the friction surfaces inside the bearing, thereby causing direct metal contact, increased friction and wear. By increasing the supply rate of lubricating oil, the loss caused by leakage can be compensated, so that there can be enough lubricating oil in the bearing to re-form the oil film, improve the lubrication conditions inside the bearing, and further improve the operating stability of the spiral centrifugal pump.

[0078] Specifically, the control module is used to obtain the temperature of the spiral centrifugal pump per unit time and calculate the temperature rise rate of the spiral centrifugal pump. If the temperature rise rate of the spiral centrifugal pump is greater than the preset rise rate, it is determined that the environmental stability of the spiral centrifugal pump does not meet the requirements, and the proportion of the working time of the spiral centrifugal pump per unit time is reduced.

[0079] It can be understood that the two intervals corresponding to the preset increase rate correspond to two situations:

[0080] The first interval is when the temperature rise rate of the spiral centrifugal pump is less than or equal to the preset rise rate, corresponding to the situation where the environmental stability of the spiral centrifugal pump meets the requirements;

[0081] The second interval is when the temperature rise rate of the spiral centrifugal pump is greater than the preset rise rate. This corresponds to the situation where the heat generated when the motor runs at high load for a long time will accumulate, causing the motor temperature to rise, thereby affecting the temperature around the pump body 4.

[0082] In practice, the preset temperature increase rate is generally selected in the range of [14°C / h, 16°C / h].

[0083] Preferably, the preset rising rate is preferably 15° C. / h.

[0084] Specifically, the temperature increase rate of the spiral centrifugal pump is the ratio of the difference between the temperature of the spiral centrifugal pump at the end time of the unit time and the temperature of the spiral centrifugal pump at the initial time of the unit time to the duration of the unit time.

[0085] In implementation, the spiral centrifugal pump described in the present invention determines the environmental stability of the spiral centrifugal pump by setting a preset rising rate, thereby reducing the impact of the reduced operating stability of the spiral centrifugal pump due to inaccurate determination of the environmental stability of the spiral centrifugal pump, and further improving the operating stability of the spiral centrifugal pump.

[0086] Specifically, the reduction range of the operating time ratio of the spiral centrifugal pump per unit time is determined by the difference between the temperature increase rate of the spiral centrifugal pump and a preset temperature increase rate.

[0087] Specifically, when the difference between the temperature rise rate of the spiral centrifugal pump and the preset rise rate is within 3°C / h, the proportion of the working time of the spiral centrifugal pump per unit time is reduced to 0.9 times the original; when the difference between the temperature rise rate of the spiral centrifugal pump and the preset rise rate exceeds 3°C / h, the proportion of the working time of the spiral centrifugal pump per unit time is reduced by 2% for every 1°C / h that exceeds. For example, the difference between the temperature rise rate of the spiral centrifugal pump and the preset rise rate is 5°C / h, the current proportion of the working time of the spiral centrifugal pump per unit time is 70%, and the proportion of the working time of the spiral centrifugal pump per unit time after the reduction is 70×0.9-2×2=59%.

[0088] During implementation, the spiral centrifugal pump described in the present invention determines the proportion of the working time of the spiral centrifugal pump per unit time by setting a preset increase rate. Since the heat generated when the motor runs at high load for a long time will accumulate, the temperature of the motor will increase, and then affect the temperature around the pump body 4. By reducing the proportion of the working time of the spiral centrifugal pump per unit time, the amplitude of the motor temperature increase can be reduced, the heat conduction to the pump body 4 can be reduced, and the temperature around the pump body 4 can be kept relatively stable, so that the pump can work in a suitable temperature environment, further improving the operating stability of the spiral centrifugal pump.

[0089] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump, characterized in that: include: A delivery module for delivering a medium, comprising a pump body, an impeller disposed inside the pump body for providing energy to the medium, a motor coupling connected to the pump body for transmitting motor power, a pump coupling connected to the motor coupling for transmitting the motor power to a spiral centrifugal pump, a one-way thrust ball bearing disposed inside the pump body for bearing an axial load, and an oil pump connected to the one-way thrust ball bearing for delivering lubricating oil; a detection module connected to the delivery module, comprising a vibration sensor connected to the pump body for detecting the vibration intensity of the pump body, a noise meter connected to the one-way thrust ball bearing for detecting the noise intensity of the one-way thrust ball bearing, and a temperature sensor connected to the pump body for detecting the temperature of the spiral centrifugal pump; a control module, connected to the delivery module and the detection module, respectively, for determining the motor speed of the spiral centrifugal pump according to the vibration intensity of the pump body of the spiral centrifugal pump, or determining the supply rate of lubricating oil according to the noise intensity of the one-way thrust ball bearing, and determining the proportion of the working time of the spiral centrifugal pump per unit time according to the temperature rise rate of the spiral centrifugal pump; The control module is used to determine whether the operating stability of the spiral centrifugal pump meets the requirements based on the vibration intensity of the pump body in the spiral centrifugal pump, and if the vibration intensity of the pump body in the spiral centrifugal pump is greater than a preset first vibration intensity, it is determined that the operating stability of the spiral centrifugal pump does not meet the requirements; The control module preliminarily determines that the operating reliability of the spiral centrifugal pump does not meet the requirements when the vibration intensity of the pump body in the spiral centrifugal pump is greater than the preset first vibration intensity and less than or equal to the preset second vibration intensity, and determines whether the operating reliability of the spiral centrifugal pump meets the requirements based on the noise intensity of the one-way thrust ball bearing; The control module reduces the motor speed of the spiral centrifugal pump when the vibration intensity of the pump body in the spiral centrifugal pump is greater than the preset second vibration intensity; The reduction range of the motor speed of the spiral centrifugal pump is determined by the difference between the vibration intensity of the pump body in the spiral centrifugal pump and a preset second vibration intensity.

2. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 1 is characterized in that: The control module is used to determine whether the operating reliability of the spiral centrifugal pump meets the requirements based on the noise intensity of the one-way thrust ball bearing. If the noise intensity of the one-way thrust ball bearing is greater than the preset first noise intensity, it is determined that the operating reliability of the spiral centrifugal pump does not meet the requirements.

3. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 2 is characterized in that: When the noise intensity of the one-way thrust ball bearing is greater than a preset second noise intensity, the control module preliminarily determines that the environmental stability of the spiral centrifugal pump does not meet the requirements, and determines whether the environmental stability of the spiral centrifugal pump meets the requirements based on the temperature rise rate of the spiral centrifugal pump.

4. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 3 is characterized in that: The control module increases the supply rate of lubricating oil when the noise intensity of the one-way thrust ball bearing is greater than the preset first noise intensity and less than or equal to the preset second noise intensity.

5. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 4 is characterized in that: The increase range of the lubricating oil supply rate is determined by the difference between the noise intensity of the one-way thrust ball bearing and a preset first noise intensity.

6. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 5 is characterized in that: The control module is used to determine whether the environmental stability of the spiral centrifugal pump meets the requirements based on the temperature rise rate of the spiral centrifugal pump. If the temperature rise rate of the spiral centrifugal pump is greater than the preset rise rate, it is determined that the environmental stability of the spiral centrifugal pump does not meet the requirements, and the proportion of the working time of the spiral centrifugal pump per unit time is reduced.

7. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 6 is characterized in that: The reduction range of the working time ratio of the spiral centrifugal pump per unit time is determined by the difference between the temperature increase rate of the spiral centrifugal pump and the preset temperature increase rate.

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