4404 results about "Centrifugal pump" patented technology

Disclosed is a centrifugal pump rotor fault diagnosis method employing CWGAN-GP and two-stream CNN models. The method comprises: first, collecting vibration displacement signals, carrying out reconstruction and then obtaining new vibration displacement signals, and forming a CWGAN-GP model training set; inputting the training set and label information corresponding to various faults into a CWGAN-GP model and performing training, then inputting random noise and the label information corresponding to various faults into the trained CWGAN-GP model, generating data corresponding to fault types, adding the generated data to vibration displacement signal sets for rotor imbalance faults and rotor misalignment faults, and obtaining an equalized data set; and training a two-stream CNN model by using the equalized data set, and then inputting vibration displacement signals and two-dimensional time frequency image data into the trained two-stream CNN model, so as to classify different types of faults of a centrifugal pump rotor. The present invention improves the efficiency and accuracy of fault diagnosis for a centrifugal pump rotor.

The invention relates to the technical field of industrial equipment health monitoring and fault diagnosis, and discloses a centrifugal pump intelligent detection method and system based on multi-source data. The centrifugal pump intelligent detection method based on the multi-source data comprises the steps that centrifugal pump multi-source heterogeneous data are collected and preprocessed; extracting multi-scale features and constructing an optimal feature subset through hierarchical feature selection; constructing a multi-level dynamic Bayesian network to establish a probabilistic reasoning framework; calculating a feature credibility weight based on the signal quality, the feature stability and the diagnosis correlation; executing multi-source evidence fusion and Bayesian state reasoning; confidence self-calibration and parameter self-adaptive adjustment are realized through historical diagnosis result feedback; the method can effectively cope with the complex and changeable environment of an industrial site, can still keep stable diagnosis performance under the condition that the sensor part loses efficacy or the data quality is uneven, improves the accuracy and reliability of fault diagnosis, and provides powerful technical support for predictive maintenance of industrial equipment.

An integrated electric motor drive. The motor drive having rotatable parts with a drive shaft and a rotor, wherein the drive shaft extends along a rotor axis and the rotor is mechanically coupled to the drive shaft; and static parts having a stator and power electronics for controlling an electric current through the stator. The integrated electric motor drive has a liquid cooling system with a closed liquid cooling circuit and a liquid coolant agitator. The closed liquid cooling circuit is filled with liquid coolant being in thermal contact with the stator and / or the power electronics. The liquid coolant agitator is arranged and configured to circulate the liquid coolant along the closed liquid cooling circuit. The liquid coolant agitator is mounted within the closed liquid cooling circuit to be rotatable about the rotor axis, and the liquid coolant agitator is magnetically coupled to the movable parts.

The invention belongs to the technical field of multi-stage centrifugal pump production, and particularly relates to an automatic production line for assembling a pump cover of a multi-stage centrifugal pump, which mainly comprises a lifting type turnover assembly, a first extrusion assembly, a second extrusion assembly, a strake pushing manipulator and an inner supporting piece feeding assembly, for a reinforced pump cover composed of a pump cover piece, an inner supporting piece and an outer hoop piece, a pump cover blank is adsorbed through a lifting type overturning assembly and is driven to overturn around the axis of the pump cover blank, and a first extrusion assembly and a second extrusion assembly are jointly used for sequentially extruding, forming and machining the pump cover blank into a pump cover semi-finished product and the pump cover piece; the second extrusion assembly is matched with the strake pushing mechanical arm to additionally install multiple circles of outer strake pieces on the outer side of the pump cover piece, the inner supporting piece feeding assembly is used for additionally installing an inner supporting piece on the inner side of the pump cover piece which moves to the second station, in this way, automatic assembling of the reinforced pump cover can be achieved, the reinforced pump cover keeps the advantage of light weight, and meanwhile the assembling efficiency is improved. The compressive strength and the overall rigidity are qualitatively improved.

The embodiment of the invention discloses a centrifugal pump set fault identification method and equipment, and the method comprises the steps: carrying out the operation simulation of a centrifugal pump set comprising a plurality of parts under different working conditions, and enabling the different working conditions to comprise a multi-source domain corresponding to a marked known working condition and a target domain corresponding to an unmarked target working condition; obtaining multi-source domain operation data and target domain operation data; processing the multi-source domain operation data and the target domain operation data respectively to generate a multi-source domain feature time sequence and a target domain feature time sequence; the multi-source domain feature time sequence and the target domain feature time sequence are input into a multi-source domain adaptive network model for training, a centrifugal pump set fault recognition model is obtained, the centrifugal pump set fault recognition model achieves extraction of public global fault features from long sequences of a multi-source domain and a target domain, and global time sequence association between the features is established; and carrying out fault identification on the target domain through the centrifugal pump set fault identification model.

The invention belongs to the technical field of energy conservation and environmental protection in the coking industry, and particularly relates to an energy-saving and environment-friendly tar residue separation system and a method thereof. The energy-saving and environment-friendly tar residue separation system comprises a gas-liquid separator, a tar residue pre-separator and a tar and ammonia water separation tank, an outlet of the tar residue pre-separator is connected with an inlet of a tar and ammonia water separation tank through a pipeline, and a bottom outlet of the tar and ammonia water separation tank is pumped to a tar centrifugal machine through a tar middle pump. And a rotary-cut crusher and an open impeller centrifugal pump are sequentially arranged on the circulating crushing pipeline in the material flow direction. The device has the beneficial effects that a tar squeezing pump is canceled and replaced by the rotary-cut crusher and the open impeller centrifugal pump, so that the equipment investment is saved, the operation cost of an enterprise is reduced, and meanwhile, the problems that the tar squeezing pump is high in failure rate and difficult to maintain are solved.

The invention provides a centrifugal pump fault diagnosis method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the feature extraction of a vibration signal of a to-be-diagnosed centrifugal pump, and obtaining a vibration feature; the vibration characteristics comprise time domain characteristics, frequency domain characteristics and time-frequency domain characteristics; inputting the vibration characteristics into a fault diagnosis model to obtain a fault diagnosis result output by the fault diagnosis model; wherein the fault diagnosis model is obtained through training based on sample vibration characteristics and fault labels corresponding to the sample vibration characteristics, the fault diagnosis model is obtained through construction based on a bidirectional long short-term memory network BiLSTM, and weight vectors in a forward propagation layer and a reverse propagation layer of the fault diagnosis model are decoupled into parameter vectors and parameter scalar quantities. According to the centrifugal pump fault diagnosis method and device, the electronic equipment and the storage medium, the prediction precision of the fault diagnosis model can be improved, and then the fault diagnosis result can be accurately obtained.

The invention discloses a centrifugal pump cavitation state recognition method based on multi-source sensor signals, which comprises the following steps: collecting the multi-source sensor signals of a centrifugal pump at different water temperatures and power frequencies to obtain multi-modal data with cavitation state labels; resampling the multi-modal signal data by using a linear interpolation method, and synchronizing and aligning the signals in a time domain; performing time-frequency analysis on multi-sensor signals by using short-time Fourier transform, performing dimensionality reduction on features through principal component analysis, and extracting one-dimensional features and two-dimensional features; a one-dimensional convolutional neural network and a two-dimensional convolutional neural network are used to carry out deep learning on signal features of different modes, and feature layer fusion is carried out on multi-dimensional features through a feature fusion strategy; classifying the fused feature vectors by using time sequence characteristics in a mode of gating a circulation unit; and adopting a weighted fusion strategy, setting a weight coefficient of each signal source according to the classification accuracy of each signal source in fault diagnosis, and inputting weighted data into a classification identification model support vector machine to obtain a final cavitation state identification result. According to the method, through the synergistic effect of the signals of the multi-source sensor, the recognition precision and robustness of the cavitation state are comprehensively improved, and the method has important economical efficiency and technical popularization value.

The invention relates to a gas recovery well downhole multistage gas flow self-adaption cyclone separation device which comprises a degassing structure and a deposition reinjection structure, the degassing structure comprises a first-stage gas-liquid separation module, and the first-stage gas-liquid separation module comprises a gas-liquid inlet outer pipe, an upper gas pipe, a gas return spiral flow channel, a vent pipe, an upper liquid gathering conical pipe and a gas return liquid conveying conical pipe; an upper air guide pipe is arranged on the upper portion of the air return spiral flow channel, an air return conical cavity is formed in the air return spiral flow channel, the upper air guide pipe is communicated with the air return conical cavity, a lower port of the air return conical cavity is in butt joint with an air return infusion conical pipe, and the upper air pipe penetrates out of the upper air guide pipe. An annular space between the vent pipe and the upper air pipe and an annular space between the upper air guide pipe and the upper air pipe form an upper air channel; the upper liquid gathering conical pipe surrounds the outside of the air returning and liquid conveying conical pipe; the deposition reinjection structure comprises a lower spiral flow channel, a lower liquid gathering conical pipe, an inverted cone and a centrifugal pump. The coalescence reinjection technology and the rotational flow technology are combined, the efficiency is high, and the service life is long.

The invention belongs to the technical field of multi-stage centrifugal pump production, and particularly relates to an automatic punching system and method for a pump cover of a multi-stage centrifugal pump, all assemblies cooperate with one another, and a clamping assembly is used for clamping a pump cover body and driving the pump cover body to rotate in the horizontal circumferential direction and rotate around the axis of the pump cover body; an H-shaped groove is formed in the pump cover body in a punching mode along the cylindrical spiral line through a notching assembly; the inner spiral supporting body and the outer spiral supporting body are correspondingly conveyed to preset positions on the inner side and the outer side of the pump cover body through the supporting body feeding assembly; the locking assembly is used for bending the protruding pieces defined by the H-shaped grooves towards the inner side or the outer side in a staggered mode, and then an inner locking piece used for locking the inner spiral supporting body and an outer locking piece used for locking the outer spiral supporting body are formed. In this way, the requirements for automatic punching and assembling of the reinforced pump cover are met, the reliability of connection between the pump cover body and the inner spiral supporting body and between the pump cover body and the outer spiral supporting body is high, connection is achieved without additional tedious procedures, and the manufacturing cost is reduced.

The invention belongs to the field of water pump runner blade design, and particularly relates to a centrifugal pump runner blade parameterization modeling and optimizing method and system.The method comprises the steps that firstly, a runner three-dimensional initial model is built according to parameters such as the inlet diameter and the outlet diameter of a runner in combination with a traditional unary theory design method; secondly, flow paths of an inlet, an outlet and front and rear cover plates of the section of a runner shaft are extracted, multiple streamlines on the runner blades are extracted at equal intervals, multiple control curves of the front and rear cover plates of the runner, blade bone lines, thickness and the like are expressed through a Bezier fitting line method, and a parameterized model of the runner blades is constructed; establishing a numerical model, and performing analog calculation to obtain multiple groups of runner external characteristics; and finally, performing iterative optimization in combination with a multi-target genetic algorithm to obtain an optimal solution. According to the method, the hydraulic optimization process of the rotating wheel is accelerated, and technical reference is provided for external characteristic optimization of the centrifugal pump.

The invention provides a centrifugal pump performance optimization method and device, computer equipment and a storage medium, and belongs to the field of centrifugal pump design. The method comprises the steps that a parameterized model of a centrifugal pump impeller is established to define the geometrical shape of the centrifugal pump impeller, a design space is determined, and a plurality of sample points are generated; for each sample point, performing computational fluid dynamics simulation, adjusting inlet pressure, monitoring a ratio of simulation lift to rated lift, determining critical cavitation pressure corresponding to the sample point, and storing flow field data to construct a data set; training an agent model by using the data set; the lift, the efficiency and the critical cavitation pressure serve as targets, design variables serve as optimization variables, performance is evaluated through an agent model, global optimization is conducted through a multi-target optimization algorithm, and a target design scheme is selected from a Pareto solution set obtained through optimization. Therefore, the centrifugal pump performance under different design variables can be quickly and accurately predicted, multiple targets are effectively balanced, and a comprehensive optimization solution is provided.

The invention discloses a curve determination method for a centrifugal pump point-by-point integration method, and belongs to the technical field of centrifugal pumps. The curve determination method of the centrifugal pump point-by-point integration method is a parameterized modeling method based on an Euler equation and momentum conservation, the inlet and outlet boundaries of a vur curve are calculated according to design requirements, after a smooth transition curve is constructed in combination with runner geometry and attack angle constraint, the curve is constructed through nonlinear interpolation according to the dynamic correlation streamline arc length, and the curve is determined. The relation between the streamline arc length and the curve is established; according to the method, when the centrifugal pump blade molded line is designed, the curve can be quickly obtained through a parameterization method according to the given design condition and the streamline arc length s.

The invention relates to the field of mechanical oil extraction of oil fields, and discloses an energy consumption braking anti-reverse device and method for an electric submersible centrifugal pump directly driven by a permanent magnet motor. The control cabinet is arranged on the ground, is connected with the permanent magnet synchronous motor in the submersible permanent magnet motor direct-drive electric submersible centrifugal pump oil extraction system through a cable, and can monitor and respond to the working state of the permanent magnet synchronous motor in real time, so that the permanent magnet synchronous motor drives the electric submersible centrifugal pump to work; an energy consumption braking circuit and a motor monitoring protection circuit are arranged in the control cabinet; the motor monitoring protection circuit is used for monitoring and responding to the working state of the permanent magnet synchronous motor in real time; the energy consumption braking circuit is used for being connected when the permanent magnet synchronous motor loses power and consuming reverse electric energy generated by the permanent magnet synchronous motor in time when the permanent magnet synchronous motor rotates reversely. The problem that the service life of the motor is shortened due to the fact that electric energy generated by reverse rotation of the permanent magnet motor under the power-off condition is converted into heat energy to be consumed in the motor can be effectively prevented.

The invention provides a centrifugal pump operation monitoring method and system, and the method comprises the following steps: collecting the operation parameters of a centrifugal pump in real time through a plurality of sensors, including inlet flow, inlet and outlet pressure and pressure difference, a main shaft vibration signal, a main shaft rotation speed, and the temperature of a pump body and a medium; denoising, abnormal value elimination and normalization preprocessing are carried out on the collected data; establishing a centrifugal pump spindle radial hydraulic exciting force model; calculating the alternating stress of the main shaft according to the hydraulic exciting force and predicting the fatigue life; and a fault early warning mechanism is designed based on the fatigue life prediction result, and real-time monitoring and fault early warning of the running state of the centrifugal pump are achieved. Through combination of data acquisition and processing, life prediction and a fault early warning mechanism, real-time monitoring of the running state of the centrifugal pump spindle and residual life prediction are achieved, and the running reliability and safety of equipment are improved.

A parallel pump set energy efficiency optimization method based on an improved grey wolf-sparrow algorithm comprises the steps that target pipe network basic data are obtained through a centrifugal pump hydraulic performance test; establishing flow-lift and flow-power polynomial fitting equations of the centrifugal pump at different rotating speeds; constructing an objective function of the parallel pump set optimization model according to requirements; constructing and considering constraint conditions of the parallel pump set optimization model; and solving by using an improved grey wolf-sparrow algorithm to obtain a parallel pump set optimization model control scheme. According to the parallel pump set optimization control scheme, optimization solution is carried out through start-stop, frequency conversion and valve adjustment, the calculation efficiency and precision are improved through an improved algorithm, the total energy consumption of the system is reduced, and meanwhile the expected life of the pump system is prolonged.

The invention relates to the technical field of pumps, in particular to a centrifugal pump with adjustable heat dissipation capability, which comprises a motor, a pump shell, a water storage cover and the like, a pump shell is arranged in front of the motor; a water storage cover used for cooling the motor is arranged on the outer side of the motor, and the water storage cover and the outer side of the motor jointly form a water-cooling heat dissipation space. According to the invention, water transmitted in the pump shell is directly contacted with the motor shell and the heat dissipation fins, which is different from the prior art, so that the problem that the original heat dissipation effect of the heat dissipation fins is reduced because the heat dissipation fins are blocked by a cooling water pipe because the cooling water pipe is wound on the motor shell and the contact area between the heat dissipation fins and the outside is reduced is solved; and moreover, an existing heat dissipation mode that water transmitted in the pump shell is in direct contact with the motor shell and the heat dissipation fins is adopted is different, water does not circulate in the cooling water pipe to exchange heat dissipated by the heat dissipation fins, and the heat dissipation effect on the motor is enhanced.

The invention relates to the technical field of centrifugal pump accessory positioning and machining, in particular to a centrifugal pump accessory positioning and machining device which is characterized in that a lifting mechanism and a rotating mechanism are arranged on the front side of a lifting console up and down, a positioning mechanism is arranged on the lifting mechanism, and a welding mechanism is arranged on the positioning mechanism; through cooperation of the positioning mechanism and the welding mechanism, the blades can be rapidly put, discharged and precisely guided and positioned, and the discharged and positioned blades can be rapidly connected to be fastened and abutted tightly and synchronously welded at the inner end and the outer end; according to the invention, through cooperation of the slewing mechanism and the lifting mechanism, not only can rapid transposition adjustment be carried out on a flat cover plate which completes blade welding and a flat cover plate which is not welded with a blade, but also blade positioning welding processing can be carried out on the flat cover plate which is not welded with the blade at the same time; and the arc-shaped cover plate on the flat cover plate subjected to blade welding is pressed and positioned so as to be matched with external welding equipment for welding machining.

The invention discloses a centrifugal pump rotor curved surface profile tolerance detection device and method, and relates to the technical field of curved surface profile tolerance detection. The device comprises a base, four conveying belt wheel supports are fixedly installed on the base, two conveying belt wheels arranged in parallel are rotationally installed on the four conveying belt wheel supports, the two conveying belt wheels are in transmission connection through two conveying belts arranged in parallel, and a gap is formed between the two conveying belts; a supporting sliding plate is arranged in the middle of the conveying belt, and the upper surface of the supporting sliding plate is in sliding fit with the conveying belt for supporting the conveying belt; an arch-shaped frame is further fixedly installed on the base, a top clamping electric cylinder and a bottom clamping electric cylinder which are symmetrically arranged are rotationally installed on the arch-shaped frame, and an external expansion extrusion clamping head and an extrusion conical head are fixedly installed at the end of a telescopic rod of the top clamping electric cylinder and the end of a telescopic rod of the bottom clamping electric cylinder correspondingly in a convenient-to-disassemble mode; a three-dimensional laser measuring and scanning assembly used for detecting the curved surface contour of the centrifugal pump rotor is further movably installed on the arch-shaped frame.

The invention relates to a high-rotating-speed multi-stage centrifugal pump supported by an air film. Efficient liquid conveying is achieved through unique design. A motor in the driving mechanism is powered on, power is stably transmitted to a pump shaft through a coupler, and a multi-stage impeller is driven to rotate at a high speed. Liquid flows in from the water inlet in the bottom of the pump body, obtains speed energy under the centrifugal force of the impeller and is converted into pressure energy through the multi-stage guide vanes, and efficient conveying is achieved. Gas is stored in a gas chamber in a stator of the air bearing and forms an air film through a multi-stage shrinkage nozzle to support a pump shaft, friction resistance is reduced, and high rotating speed is adapted. The rubidium magnet in the rotor shaft sleeve interacts with the magnetic fluid cavity, so that sealing is enhanced, and adjustment is assisted. The mechanical seal and the oil seal prevent liquid leakage and protect the air bearing. An overflow cavity and an overflow groove adjust pressure in the pump, a water inlet filter screen intercepts impurities, and a pull rod stabilizing structure is reinforced. The centrifugal pump effectively solves the problem of a traditional centrifugal pump at a high rotating speed and has the advantages of high efficiency, stability, long service life and the like.

The invention relates to the technical field of multi-stage centrifugal pumps, and discloses an axial balance assembly which comprises a balance shaft sleeve, a pump shaft and a high-pressure throttling ring connected to a water inlet and outlet section, the balance shaft sleeve is connected to the pump shaft and arranged on the periphery of the pump shaft in a sleeving mode, and the high-pressure throttling ring is arranged on the periphery of the balance shaft sleeve in a sleeving mode. The high-pressure throttling ring and the periphery of the balance shaft sleeve are limited to form a flow blocking cavity, the flow blocking cavity is provided with a high-pressure flow blocking inlet and a high-pressure flow blocking outlet, the high-pressure flow blocking inlet and the high-pressure flow blocking outlet are oppositely arranged at the two ends of the flow blocking cavity in the axial direction of the balance shaft sleeve, and the high-pressure throttling ring is provided with a high-pressure ring end face. The balance shaft sleeve is provided with a high-pressure shaft end face, and the high-pressure choke flow inlet is located between the high-pressure ring end face and the high-pressure shaft end face. According to the axial balance assembly, generation of residual axial force from the high-pressure section to the low-pressure section is reduced, the service life of the water pump is prolonged, and the operation reliability of the water pump is improved.

The invention relates to the field of centrifugal pumps, and particularly discloses an intelligent cleaning and back flushing multi-stage centrifugal pump which comprises a multi-stage centrifugal pump body, a water inlet formed in the side face of one end of the multi-stage centrifugal pump body and a water outlet formed in the top of one end of the multi-stage centrifugal pump body. A hollow switching shell is arranged on the side face of the water inlet in a communicating mode, an inner cavity of the switching shell is cylindrical, a filtering switching assembly is arranged on the inner side of the switching shell and comprises a switching shaft rotationally arranged in the middle of the inner side of the switching shell, and a pair of oppositely-arranged filtering plates are arranged on the side wall of the switching shaft. According to the intelligent cleaning and back flushing multi-stage centrifugal pump, through mutual cooperation of the switching shell, the filtering switching assembly, the first sealing plate, the water pressure sensor and the pipeline assembly, blockage monitoring and automatic cleaning can be achieved while filtering and impurity blocking are achieved, shutdown is not needed, and the efficiency is improved.

The invention provides a gas-liquid-solid multi-phase conveying centrifugal pump performance prediction method and an optimization design method. According to the method, the performance of the centrifugal pump is accurately predicted and the design efficiency of the centrifugal pump is improved through numerical simulation and optimization design in combination with a gas-liquid-solid three-phase flow dynamic model. Firstly, blade parameters are determined according to design requirements, a three-dimensional model is established, and grid division is carried out; then, the VOF-Level Set multiphase flow model, the particle model and the gas-liquid-solid coupling model are corrected, factors such as surface tension, particle immersion force and drag force are considered, and lift and efficiency curves are calculated through numerical simulation; and finally, a particle accumulation area is analyzed based on the particle distribution characteristic graph, and the optimal lift efficiency combination is obtained by adjusting parameters such as the inlet angle, the inlet width, the wrap angle and the blade number of the blades and optimizing design. According to the method, the performance of the centrifugal pump in the gas-liquid-solid multiphase flow environment can be improved, and a new design thought is provided.

The utility model relates to the field of centrifugal pumps, in particular to an automatic exhaust type low-cavitation double suction pump which comprises a motor, a pump body in transmission connection with the motor and an air ejector. The controller is in communication connection with the motor, the pressure module is used for detecting the pressure of a liquid outlet of the pump body, the venturi tube is located on the outer side of the pump body, a negative pressure opening of the venturi tube is connected with an exhaust opening formed in the top of the pump body through an exhaust pipe, and a positive pressure inlet of the venturi tube is connected with a pressure air source through an air inlet pipe. A positive pressure outlet of the venturi tube is connected with the atmosphere, an air inlet valve is installed on the air inlet pipe, an air suction valve is installed on the exhaust pipe, and the air inlet valve and the air suction valve are in communication connection with a pressure module through a controller. And normal operation of the pump is ensured.

The utility model relates to the technical field of underground water sampling, and discloses underground water sampling equipment with well washing and low-flow-rate sampling functions, which comprises an aquifer, a well wall arranged in the aquifer, a screen pipe fixedly connected to the inner wall of the well wall, a centrifugal pump arranged in the well wall, and a well washing pipe fixedly connected to an outlet of the centrifugal pump. According to the underground water sampling equipment with the well washing and low-flow-speed sampling functions, through the arranged cleaning mechanism, when impurities adhering to the outer side of a filter cylinder need to be cleaned, an inserting block can be moved out of the interior of a through opening, limiting is canceled, the filter cylinder can be pulled downwards, an inserting column is pulled out of the inner wall of an inserting base, and the filtering cylinder is pulled out; and similarly, the filter cartridge can be conveniently mounted under the action of the inclined surface of the insertion block, so that good mounting and dismounting efficiency can be achieved while cleaning is realized, the time consumed by workers is further saved, and the operation convenience of the device is improved.

The invention discloses a centrifugal pump flow dynamic detection system based on the Internet of Things, and relates to the technical field of intelligent sensing systems. Comprising a data acquisition module used for acquiring multi-source signals in real time and obtaining a sensing feature data set after preprocessing; the physical property parameter module is used for calculating the influence parameters of the physical property change of the medium on the pump performance based on the sensing characteristic data set to obtain a medium physical property parameter set; the flow prediction module is used for correcting a preset flow prediction model through the medium physical property parameter set to obtain a corrected flow prediction model; inputting a sensing characteristic data set acquired in real time into the corrected flow prediction model, and outputting to obtain a flow prediction value; the traffic detection module is used for judging whether the current traffic is abnormal or not based on the traffic predicted value, the historical traffic data and a preset operation threshold parameter set, and giving a traffic detection result; the influence of medium physical property changes on flow detection can be accurately captured, and the accuracy and stability of flow detection are improved.

Disclosed in the present invention is a centrifugal pump assembly method having a high-temperature-resistant process. The assembly method comprises: a. preparation before assembly; b. clamping and fixing; c. adjustment; d. connection; and e. the mounting of bases. In the present invention, an electric motor, a pump body and a holder are respectively assembled by means of an auxiliary mounting table, then the electric motor is positioned and mounted on the auxiliary mounting table through the cooperation of a limiting block, a limiting part and a clamping part, and then the mounting position of the pump body and the mounting position of the holder are adjusted by means of a clamping body adjusting assembly and an assembling assembly, thereby achieving accurate butt-joint and mounting of the electric motor, the pump body and the holder, and thus greatly improving the mounting precision of a centrifugal pump; and stacked bases are pushed to the auxiliary mounting table one by one by means of a splitting device, and the electric motor, the holder and the pump body, which are fixedly connected, are mounted on the bases by means of a hoisting apparatus, thereby improving the assembly efficiency of the centrifugal pump.

A centrifugal pump shutdown sealing device based on axial thrust comprises a pump cover (1) and an annular plate (11), an inner cylinder (3) and an outer cylinder (5) are connected between the pump cover and the annular plate in a sealed mode, an inner corrugated pipe (4) and an outer corrugated pipe (8) are welded between the sections of the inner cylinder and between the sections of the outer cylinder respectively, a water injection port (6) is formed in the outer cylinder, and a guide rod (7) penetrates through the annular plate and is fixedly connected to the pump cover. The right end of the guide rod is sleeved with a spring (10) and screwed with an adjusting nut (11), the left side of the annular plate is connected with a rubber annular plate (13), a shaft sleeve (14) is fixed to the pump shaft, and the rubber annular plate can be attached to the right end face of the shaft sleeve. The sealing device has the advantages that all the components are installed on the pump cover, the load of the pump shaft is reduced, unbalanced force cannot be generated on the pump shaft, the sealing device is not prone to being damaged when the machine stops, and no adverse effect is generated on the pump shaft. When the centrifugal pump works, the rubber ring plate on the ring plate is separated from the shaft sleeve, and when the centrifugal pump stops, the rubber ring plate is tightly attached to the shaft sleeve.

The invention relates to the field of centrifugal pumps, and particularly discloses a sealed centrifugal pump with a self-cooling function, which comprises a pump shell, an impeller, a pump shaft, a motor, a liquid inlet pipe and a liquid outlet pipe, a closed heat exchange pipe is arranged on the motor, and a negative pressure block is arranged at one end, far away from the liquid inlet pipe, of the pump shaft; a heat exchange box is arranged in the pump shell and located at the end, away from the liquid inlet pipe, of the impeller, the heat exchange pipe extends into the heat exchange box, a circulation hole for liquid to flow in is formed in the heat exchange box, the heat exchange box further communicates with a liquid drainage branch pipe, the liquid drainage branch pipe communicates with the liquid outlet pipe, the liquid inlet pipe communicates with a liquid supply branch pipe, and the liquid supply branch pipe extends into the pump shell and right faces the negative pressure block. A driving assembly used for driving cooling liquid in the heat exchange pipe to flow through liquid on the back face of the impeller is arranged in the pump shell. The motor cooling device has the advantages that the cooling efficiency is high, cooling liquid in the heat exchange pipes is pure, and the motor sealing performance is high.

The invention relates to the technical field of self-sucking pumps, in particular to an efficient vacuum energy-saving self-sucking pump which comprises a base, a first pump cavity, a motor, a rain baffle, a first impeller, a compensation assembly and a drainage assembly, the first pump cavity, the motor and the rain baffle are sequentially installed at the upper end of the base, and the first impeller is installed at the axis position in the first pump cavity; the drainage assembly is installed at the lower end of the first impeller, and the two compensation assemblies are installed in the drainage assembly. After the drainage assembly is started, the drainage assembly is used for guiding the liquid level to overflow the first impeller and removing large-particle solids in fluid, and the compensation assembly drives the first impeller to move downwards to reduce the gap when detecting that the gap between the first impeller and the inner wall of the first pump cavity is enlarged. The tip end of the blade is easily and continuously washed by solid particles, so that the flow and lift of the core pump are reduced, and the efficiency is obviously reduced.