Efficient energy-saving equal-pitch intelligent spiral centrifugal pump

Abstract

The invention relates to the technical field of spiral centrifugal pumps, in particular to an efficient energy-saving equal-pitch intelligent spiral centrifugal pump which comprises a conveying module used for conveying a medium; the detection module is connected with the conveying module and comprises a vibration sensor which is connected with the pump body and used for detecting the vibration intensity of the pump body, a noise meter which is connected with the one-way thrust ball bearing and used for detecting the noise intensity of the one-way thrust ball bearing, and a temperature sensor which is connected with the pump body and used for detecting the temperature of the spiral centrifugal pump; the control module is connected with the conveying module and the detection module and used for determining the rotating speed of a motor of the spiral centrifugal pump according to the vibration intensity of a pump body in 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 controlling the supply rate of the lubricating oil according to the noise intensity of the one-way thrust ball bearing. And the working time proportion of the spiral centrifugal pump in unit time is determined according to the temperature rising speed of the spiral centrifugal pump. The operation stability of the spiral centrifugal pump is improved.

Description

Technical Field

[0001] The 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 faced with 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 feed 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 pipeline, a pressurizing device is installed on the feed pipeline, 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 edge of the impeller is washed and worn during long-term contact with high-speed flowing liquid, which changes the shape and mass distribution of the blades and thus causes the operating stability of the spiral centrifugal pump to decrease. 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, thereby reducing the operating stability of the spiral centrifugal pump.

[0005] To achieve the above-mentioned purpose, 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 delivery module, and ... 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] Further, 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] Further, 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] Further, the increase range of the supply rate of the lubricating oil 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 working time of the spiral centrifugal pump per unit time is reduced.

[0015] Furthermore, 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 a preset increase rate.

[0016] Compared with the prior art, the beneficial effect of the present invention lies in 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. Such wear will change the shape and mass distribution of the blades, 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, the pump body and the shaft system can be prevented from being damaged due to excessive vibration, and the service life of the equipment can be extended. 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, 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 amplitude of the motor temperature increase can be reduced, the heat conduction to the pump body can be reduced, and the temperature around the pump body 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.

[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 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, 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 the leakage can be compensated, so that there can be enough lubricating oil in the bearing to re-form the oil film, thereby improving the lubrication conditions inside the bearing, and further improving 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. 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. 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, the pump can work in a suitable temperature environment, and the operating stability of the spiral centrifugal pump is further improved. 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 an overall structural block diagram of a high-efficiency, energy-saving, equal-pitch intelligent spiral centrifugal pump according to an embodiment of the present invention;

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

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

[0024] The accompanying drawings 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 only used to explain the present invention and are not used 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 protection scope 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 drawings. This is merely 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] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively the overall structural schematic diagram, the overall structural block diagram, the logic flow chart and the specific structural block diagram of the detection module of the embodiment of the present invention. The present invention is an efficient 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 arranged 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 arranged 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, which is respectively connected to the delivery module and the detection module, 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 connected to the pump body 4 to introduce the medium into the pump body 4;

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

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

[0037] A mechanical seal 6 cover 5, which is connected to the mechanical seal 6 and is used to protect the mechanical seal 6;

[0038] A stationary ring seat 7, which is connected to the mechanical seal 6 and is used to fix the mechanical seal 6;

[0039] A rear cover bearing body 8, which 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, which is connected to the one-way thrust ball bearing 17 and is used to protect the one-way thrust ball bearing 17;

[0041] A pump shaft 15, which is arranged 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 load;

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

[0044] A stopper sleeve 14, which is connected to the pump shaft 15 and is used to axially position the components on the pump shaft 15;

[0045] A thrust bearing sleeve 16, which is connected to the one-way thrust ball bearing 17 and is used to position the one-way thrust ball bearing 17;

[0046] A thrust bearing seat 18, which is connected to the one-way thrust ball bearing 17 and is used to support the one-way thrust ball bearing 17;

[0047] A spherical roller bearing 19 connected to the pump shaft 15 to bear radial load and axial load at the same time;

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

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

[0050] Specifically, the working time proportion of the spiral centrifugal pump is the proportion 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. Such 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, and the pump body 4 and the shaft system can be prevented from being damaged due to excessive vibration, thereby 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 are leakage points in the lubricating oil pipeline, the lubricating oil will be 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 can be 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 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, 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, 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, and the corresponding lubricating oil pipeline has a leakage point, so that 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 and increasing 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. 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 blades, causing the center of mass position of the impeller 3 to shift, thereby causing 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 the 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 exceeding. 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, and 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 of 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 edge 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, and the corresponding lubricating oil pipeline has a leakage point, causing the lubricating oil to be 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 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, which corresponds to the situation that 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 in the range of [63dB, 67dB], and the preset second noise intensity is generally selected in 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 the 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 it. 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 of 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 leakage point 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 the 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 increase rate of the spiral centrifugal pump is less than or equal to the preset increase 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, which corresponds to the situation that 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.

[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 increasing 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 decreased 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 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.

[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 exceeding. For example, the difference between the temperature rise rate of the spiral centrifugal pump and the preset rise rate is 5°C / h, the 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] In 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. 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. 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, 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, further improving the operating stability of the spiral centrifugal pump.

[0089] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump, characterized in that: include: A conveying module, for conveying 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 conveying 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, which is connected to the delivery module and the detection module respectively, 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 working time proportion of the spiral centrifugal pump per unit time according to the temperature rise rate of the spiral centrifugal pump.

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 stability of the spiral centrifugal pump meets the requirements according to 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 the preset first vibration intensity, it is determined that the operating stability 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 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.

4. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 3 is characterized in that: 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.

5. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 3 is characterized in that: The control module is used to determine whether the operating reliability of the spiral centrifugal pump meets the requirements according to 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.

6. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 5 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.

7. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 6 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.

8. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 7 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.

9. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 8 is characterized in that: The control module is used to determine whether the environmental stability of the spiral centrifugal pump meets the requirements according to the temperature increase rate of the spiral centrifugal pump. If the temperature increase rate of the spiral centrifugal pump is greater than the preset increase 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.

10. The high-efficiency and energy-saving equal-pitch intelligent spiral centrifugal pump according to claim 9 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 increase rate.

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