66 results about "Pump pressure" patented technology

The utility model relates to coffee machine auxiliary equipment technical field, specifically is a kind of coffee machine brewing device outlet structure, comprising: funnel-shaped outlet pipeline and its columnar output end, output end is connected with the communication sleeve of sealing ring belt, and is connected with waste water collection tank through telescopic hose, outlet pipeline side wall inserts food-grade cleaning agent tank, manually lifting type pump pressure mechanism is equipped in tank, and push cleaning fluid enters pipeline flushing through the opening and closing mouth of hinged sealing sheet control, waste liquid is introduced into collection tank in orientation. The device realizes efficient cleaning, waste water zero pollution, and convenient operation, applicable to various coffee machines.

The application relates to a gas control vacuum proportional valve, belonging to the field of gas pump pressure regulation, and mainly applied to vacuum pumping after electrolyte is filled into a battery pack of a lithium battery. The gas control vacuum proportional valve comprises a valve head, a valve body and a valve core. The valve head and the valve body enclose a positive pressure cavity connected with a positive pressure gas source. The valve core is provided with an output air channel connected with a vacuum pump and an input air channel connected with a lithium battery device to be vacuumized. The input air channel and the output air channel are selectively connected into a vacuum flow channel through an air port. The valve core is further provided with a containing cavity and a gas control pressure regulating assembly arranged in the containing cavity. The gas control pressure regulating assembly comprises a rubber-coated valve port diaphragm separating the vacuum flow channel and the containing cavity. The valve core is provided with a gas stopping baffle. The gas pressure in the positive pressure cavity can drive the rubber-coated valve port diaphragm and cooperate with the gas stopping baffle to form the air port. The containing cavity is always in a sealed state, so that the problem that corrosive electrolyte is inhaled into the containing cavity along with the gas when the gas control vacuum proportional valve is used to pump vacuum after electrolyte is filled into the battery pack is solved.

The utility model discloses a high temperature plunger pump pressure sensor protection cover belongs to plunger pump accessory technical field. This kind of high temperature plunger pump pressure sensor protection cover, high temperature pump protection cover includes base body, protection cover body and heat dissipation subassembly, high temperature pump base body is fixedly arranged on the outer wall of high temperature pump, and high temperature pump base body includes heat -proof base, and high temperature pump heat -proof base is ceramic fiber board material quality, high temperature pump protection cover body is arranged at the outside of base body, and the main part of high temperature pump pressure sensor is located in protection cover body, and high temperature pump protection cover body includes heat -proof cover, high temperature pump heat -proof cover includes the shell, intermediate layer and inner tube that set up by outside to inside in proper order, and high temperature pump shell is stainless steel material quality, and high temperature pump intermediate layer is aerogel heat -proof felt, and high temperature pump inner tube is high temperature resistant ceramic fiber material quality, and high temperature pump heat dissipation subassembly sets up on protection cover body, is used for the heat that possibly accumulated in protection cover body to outwardly radiate.

This invention relates to a coating supply device for color-coated aluminum plate printing, and relates to the technical field of color-coated aluminum plate printing. It includes a feeding cylinder, a support frame, a rotating mechanism, a stirring mechanism, an insertion tube, a connecting tube, an output nozzle, a baffle plate, a connecting seat, a linkage groove, a spreading mechanism, an ejection pressing mechanism, and a linkage mechanism. This application solves the problem that existing technologies mainly rely on a single pump pressure to achieve coating output and thickness control. Facing the high-standard requirements of color-coated aluminum plate printing, this device performs poorly in coating thickness control, making it difficult to accurately correct the coating at multiple stages when the coating roller is running at high speed. This easily leads to defective products with excessive thickness. Furthermore, during long-term continuous feeding, if particles settle to the bottom causing sudden changes in local concentration or slight blockage of the pipeline, it greatly interferes with the uniform distribution of the coating on the coating roller surface, resulting in inconsistent output concentrations and uneven coating thickness, leading to problems such as printing color differences and defective products.

This invention relates to a hydraulic load-sensitive multi-way valve testing system, comprising a driver, a load-sensitive pump assembly, a variable hydraulic resistance, a load-sensitive compensator, and a directional valve connected in series to form a hydraulic output circuit. The driver controls the load-sensitive pump assembly to drive hydraulic oil upwards, which then experiences a pressure drop after passing through the variable hydraulic resistance. Finally, the hydraulic oil is output through the directional valve. The load-sensitive compensator is connected to the directional valve. The load-sensitive pump assembly includes an output pump, a pressure control valve, and a flow control valve. The driver drives the output pump. The rod chamber of the output pump is connected to the pressure control valve and the flow control valve. The output pump is connected to the directional valve, and the variable hydraulic resistance is located between the output pump and the directional valve. The pressure control valve is connected to the flow control valve and is used to limit the maximum working pressure. The inlet of the flow control valve is connected to the inlet of the directional valve. This invention provides a hydraulic load-sensitive multi-way valve testing system with small measurement errors.

This application provides a multi-parameter fusion-based intelligent interactive method for intelligent drilling operations in explosion-proof environments. The method includes: obtaining a joint feature sequence dataset containing abnormal pump pressure spikes and continuous torque increases by fusing historical drilling multi-parameter time-series data and formation lithology stratification sequences; processing the joint feature sequence dataset using a long short-term memory network to obtain a predictive model capturing the temporal coupling relationship between pump pressure and torque, as well as the formation response delay effect; updating the drilling parameter control baseline using the torque-pump pressure trend envelope curve data to obtain a sequence of rotary table speed, drilling pressure, and displacement control commands targeting the pump pressure and torque coupling relationship; and feeding back the rotary table speed, drilling pressure, and displacement control command sequences to the drilling control system to obtain the actual pump pressure and torque sequences for the next well section after real-time execution. This application can effectively reduce the probability of complex accidents such as stuck pipe and lost circulation.

The invention discloses a digital twinning and hanging load coupled well leakage monitoring system and method. According to the system, a full-shaft multi-physics-field coupled digital twinborn model is constructed, a fluid density correction model changing along with pressure and temperature and an unsteady fluid mechanics calculation method are combined, and the theoretical pumping pressure and the theoretical hook hanging load are obtained; based on the deviation between the actually-measured pump pressure and the theoretical pump pressure and the deviation between the actually-measured hook hanging load and the theoretical hook hanging load, a pump pressure-hanging load cooperative judgment mechanism is established, and well leakage state recognition is achieved; determining a well leakage position through a virtual monitoring node arranged along a shaft in combination with pressure wave propagation characteristics; meanwhile, self-adaptive switching of monitoring modes is achieved according to the state of the underground pressure measuring instrument. The accuracy and real-time performance of well leakage identification can be improved, and the influence of temperature and pressure disturbance on the identification result is reduced.

The application discloses a method for adjusting the pressure of a main pump in an extracorporeal circulation process, and the method comprises the following steps: after the pre-charging of a membrane oxygenator is completed, an arterial pipeline connected with the membrane oxygenator is clamped and closed, and only a small side pipeline is left to communicate with the membrane oxygenator; a pump pressure gauge is arranged on the small side pipeline; the main pump is adjusted to a required position, and the pressure of the main pump on the circulating pipeline is adjusted, and the pressure is adjusted to 150mmHg-250mmHg. The specific pressure value of the main pump when the pressure is adjusted is displayed by the pump pressure gauge, so that the adjustment process and result can be visualized, the adjustment result is converted into the specific pressure value of the pump pressure gauge, the reference data of the adjustment of the pressure of the main pump is standardized, the adjustment precision is effectively ensured without relying on experience and feeling, the adjustment mode is quick and accurate, the adjustment efficiency can be improved, and the stability of the adjustment pressure is ensured by controlling the pressure of the main pump, so that the backflow of arterial blood caused by unstable pressure can be avoided.

The utility model discloses a pump pressure test device for valve sleeve assembly pressure plugging, which relates to the field of valve sleeve detection equipment and comprises a frame main body, an oil plugging shaft sleeve is in liftable threaded connection with a top cross beam of the frame main body, and an oil inlet shaft sleeve is mounted at the bottom of the frame main body. The oil inlet shaft sleeve is connected with a high-pressure oil pipe adapter through a pipeline, the high-pressure oil pipe adapter is installed at the bottom of the frame body and connected with a high-pressure oil pipe of an external hydraulic system, and a pump pressure sleeve is detachably installed between the oil inlet shaft sleeve and the oil plugging shaft sleeve. A valve sleeve assembly to be detected is connected in the pump pressure sleeve through an O-shaped sealing ring. The device disclosed by the utility model is simple, compact and practical in structure, low in manufacturing cost and short in period, and lays a powerful foundation for improving quality and efficiency of enterprises.

The application discloses a kind of for oil centrifugal pump cavitation risk multi-source data fusion identification method, comprising:A1: collecting the pump pressure, flow, vibration acceleration, medium temperature time series signal in the running process of oil centrifugal pump and respectively pre-processing;A2: extracting cavitation sensitive features, cross-channel fusion features in each channel in turn;A3: extract vibration sensitive band energy features, enhanced cavitation weak features;A4: calculate multi-source time series joint input, cavitation evolution hidden state sequence;A5: get causal constraint time series attention features;A6: calculate relative importance weight vector, fusion discriminant features;A7: calculate cavitation risk level label, cavitation confidence score.The application can solve the problem that traditional method and existing single model are difficult to find in long distance transportation and complex working condition cavitation, artificial judgment is strongly dependent and early weak feature identification is insufficient.

The application provides a high-pressure oil pump PCV pressure control valve, which adjusts pressure by a stroke gasket to control fuel flow, and has higher control precision and faster dynamic response. The valve comprises a valve core, a valve sleeve, a valve body, an armature, a return spring and an electromagnetic coil. The valve core comprises a guide cylinder, and a valve core stopper protrusion and a flow-avoiding ring groove are arranged on the bottom of the guide cylinder from bottom to top. The valve sleeve comprises a guide through hole in the radial center, and a sealing valve port is arranged on the bottom of the guide through hole. The sealing valve port cooperates with the valve core stopper protrusion to perform closing operation. A plurality of oil inlet holes are arranged on the outer surface of the lower part of the valve sleeve and are connected to the guide through hole and the flow-avoiding ring groove. The valve body comprises a valve core guide movable cavity and a plurality of coil installation cavities. The valve core guide movable cavity is arranged on the lower part of the radial center of the valve body, and the plurality of coil installation cavities are arranged on the valve body.

The application discloses a screw pump screw sleeve pre-tightening method and belongs to the technical field of screw pump machining, and comprises the following steps: S1, clamping nuts are installed at the pre-tightening positions of screw sleeves; S2, a transmission shaft and the screw sleeves are placed in a pre-tightening device, and the pre-tightening device is assembled; S3, a hydraulic pump is started, and the hydraulic stretcher makes the transmission shaft produce elastic deformation; S4, according to the functional relationship between the pre-tightening torque and the output pressure of the hydraulic pump, the clamping nuts are locked when the pre-tightening torque reaches the technical requirement; and S5, the hydraulic pump pressure is unloaded, and the pre-tightening device is disassembled. The application can accurately control the pre-tightening torque of the screw sleeve, does not bring about destructive torsional load, and avoids damage to the clamping nuts and the transmission shaft.

1. Name of the product in this design: Pressure Switch (EWPC-5). 2. Application of this design: Used for pressure control of water pumps such as QB series water pumps, booster pumps, and deep well pumps. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application discloses a double-cavity diaphragm pump with a control valve, which comprises a control valve, a pump body, a crankshaft assembly, a left diaphragm and a right diaphragm; the crankshaft assembly is rotationally connected to the inner cavity of the pump body, and the input shaft of the crankshaft assembly extends out from the rear side of the pump body. The left part and the right part of the pump body are respectively provided with a left piston cavity and a right piston cavity, and the inside of the left piston cavity and the inside of the right piston cavity are both provided with a piston connecting rod mechanism connected with the crankshaft assembly. The control valve comprises a valve body, an adjusting pipe, a valve core, a lever wrench and a knob; the rear side, the left side, the right side and the upper end of the valve body are respectively provided with a feeding port, a left discharging pipe, a right discharging pipe and a material returning pipe. The upper part of the pump body is provided with a material cavity, the upper end of the pump body is provided with a top cover, the material cavity is sealed by an upper diaphragm, and an air cavity is formed between the upper diaphragm and the top cover; the top cover is provided with an air inlet nozzle and an air outlet nozzle, and the air inlet nozzle and the air outlet nozzle are communicated with an external pneumatic system. The pump body in the application adopts a main power and an auxiliary power, and has stronger pump pressure.

This invention relates to the field of data processing technology, and discloses a method, apparatus, construction machinery, and medium for determining pump pressure in a hydraulic system. The method includes: when a first pressure detection device corresponding to a target auxiliary pump is detected to be in a fault state, acquiring the output torque of the engine side connected to the hydraulic system and the first input torque corresponding to each of the other auxiliary pumps; calculating the second input torque corresponding to the target auxiliary pump based on the output torque and the first input torque corresponding to each of the other auxiliary pumps; and calculating the current pump pressure of the target auxiliary pump based on the second input torque and the pump displacement and volumetric efficiency corresponding to the target auxiliary pump. This invention provides accurate pressure data for the stable operation of the hydraulic system after the pressure detection device on the target auxiliary pump malfunctions, avoiding safety risks, ensuring the performance stability of the construction machinery, and contributing to extending the service life of the entire construction machinery.

The application discloses a mud ball preventing centralizer with mechanical breaking function and belongs to the technical field of oil and natural gas drilling, which comprises a centralizer body, a centralizing wing arranged on the periphery of the centralizer body, a multi-stage flow distribution mechanism, an energy conversion and pulse modulation mechanism and a poking execution mechanism. The multi-stage flow distribution mechanism is used for adjusting the drilling fluid flow of a bypass flow channel entering the centralizer body according to the step change of the ground pump pressure. The energy conversion and pulse modulation mechanism is used for converting the smooth flow in the bypass flow channel into high-frequency pressure pulses. The poking execution mechanism is used for executing radial reciprocating poking actions under the drive of the high-frequency pressure pulses to break the mud ball adhered to the side wall of the centralizer body and the centralizing wing. The multi-stage flow distribution mechanism, the energy conversion and pulse modulation mechanism and the poking execution mechanism are sequentially and serially arranged in the centralizer body. The application actively breaks the mud ball by using the radial impact force driven by the high-frequency pulses to actively crush the dense mud ball, thereby significantly improving the mud ball removing efficiency of the complex stratum and effectively reducing the risk of pipe sticking.

Adjustable vane pump (10) with a suction side (46) and a discharge side (21), with a housing (12) and with a rotor (18) rotatably mounted in the housing (12) about a rotor axis (16) and carrying at least one vane (22) movable in the radial direction, wherein the housing (12) comprises a housing base (30) and a housing cover (26) transversely to the rotor axis (16), and wherein an adjustable cage (32) is provided in the housing (12) between the housing base and the housing cover, surrounding the rotor (18) together with the vane (22) and adjustable transversely to the rotor axis (18), wherein the housing (12) and the adjustable cage (32) define a pressure chamber (38) fluidly connected to the discharge side (21), wherein a return element (36) is provided which forces the adjustable cage (32) into a basic end position, and wherein the adjustable cage (32) is deflected from the basic position when a limit operating quantity designed as limit pressure is exceeded in the pressure chamber (38),characterized in that the rotor is driven by an electric motor designed as a rotor drive (19), wherein the rotor drive (19) is operated in the nominal speed range (a) both when the adjustable cage (32) is in the basic end position and when the adjustable cage (32) is deflected from the basic end position, and in that adjustment of the adjustable cage (32) takes place directly depending on the pressure-side pump pressure, wherein the pressure side (21) is fluidically directly connected to the pressure chamber (38).

This invention relates to the technical field, specifically to a drilling fluid control system for fractured formations. The system includes a pressure difference extraction module, a flow velocity deviation extraction module, a fracture abrupt change identification module, a channel switching execution module, and a pump pressure adjustment execution module. In this invention, by analyzing the fluctuation amplitude of the pressure time series difference between different depths in the wellbore and comparing the flow velocity change trend, a joint identification mechanism for abnormal seepage path changes is established. This triggers control commands to drive adjustments to the delivery channel state, shortening the response cycle from identification to execution and improving the flexibility of path control. Furthermore, after the channel state switching is completed, pump pressure adjustment is performed based on the resistance characteristics of the current connection structure. By dynamically adapting the delivery frequency and pressure output, the matching and control of the fluid operating state are achieved, enhancing the drilling fluid's adaptability to fracture abrupt change environments, mitigating pressure disturbances caused by abnormal seepage, and maintaining a stable wellbore operating environment.

The application provides a differentiated hole arrangement design method for increasing the number of fracture cracks in a heterogeneous reservoir, and belongs to the technical field of oil and gas exploitation. Reservoir quality parameters, rock mechanics parameters and ground stress parameters of a target well and fracture crack distribution of a neighboring well of the target well are obtained to design the number of fracture cracks / cluster number, position and shape of each cluster of cracks. A mathematical model of the fracture cracks is selected according to the ground stress parameters and the shape of each cluster of cracks to calculate the net pressure required by the shape of each cluster of cracks. A random algorithm is used to determine the displacement of each cluster of cracks and the number of perforation holes, and the friction of each cluster of crack holes is calculated. The bottom hole pressure of each cluster of cracks is calculated according to the net pressure of each cluster of cracks and the friction of each cluster of crack holes, and if the bottom hole pressure of each cluster of cracks is equal, the next step is performed. The ground pumping pressure is calculated by using a fluid mechanics method, and if the ground pumping pressure meets the set conditions, the design is completed. The method can reduce the downhole complex risks such as channeling, improve the fracturing construction efficiency and reservoir reconstruction effect, and reduce the construction cost.

The application belongs to the technical field of temporary plugging agents, and particularly relates to a space three-dimensional rough and tortuous crack temporary plugging agent formula optimization method. The method comprises the following steps: preparing a homogeneous cubic outcrop rock sample, and performing wellbore completion; controlling the three-way stress value, so that the rock sample generates a space three-dimensional hydraulic fracture; knocking the rock sample along the crack path by using a rubber hammer with a rubber pad; bonding steel balls with different particle sizes around the crack surface by using epoxy resin, and controlling the crack opening degree; expanding the pipeline inner diameter, pumping temporary plugging agents with different formulas to plug the cracks; setting the maximum pumping pressure, recording the pumping pressure and fluid pumping volume, observing the temporary plugging agent laying form on the three-dimensional crack surface, and judging whether the temporary plugging agent formula can be used for in-crack plugging construction. The method solves the problems that the existing method cannot completely simulate the temporary plugging and fracturing process and cannot consider the influence of the space three-dimensional crack form, and ensures that the optimized temporary plugging agent formula obtains more reliable temporary plugging effect.

This utility model relates to downhole release devices and belongs to the field of downhole tool technology. The purpose of this utility model is to address the problems existing in the prior art by providing a downhole release device, including an upper connector, with a casing female thread and a trapezoidal thread male thread at both ends; and a lower connector, with a trapezoidal thread female thread and a casing male thread at both ends; the ends of the trapezoidal thread male and female threads are tapered. The upper and lower connectors of this utility model are connected by trapezoidal threads at the tapered ends; after connection, an effective seal is formed, isolating internal and external mud. Even under high pump pressure circulation, the tapered trapezoidal threads will not be eroded by mud and can withstand various complex stresses (but not torque) together with the tubing string.

The application discloses a filtering method for filtering mud pump pressure ripple, and belongs to the technical field of oil and gas drilling, and comprises the following steps: a, a bypass pipeline is additionally arranged beside a drilling fluid riser, and a buffer is arranged on the bypass pipeline; b, a pressure sensor is arranged at the outlet of a mud pump to collect pressure signals, and a control signal opposite to the crest and trough of a mud pump pulse pressure wave is generated after computer processing, and the control signal is used for controlling the buffer to balance the pulse pressure wave; c, a valve mechanism is connected to the bypass pipeline, and a controller is connected to the valve mechanism; d, when a downlink instruction is transmitted, the valve mechanism is controlled to be turned on by a rotary guide downlink instruction transmission control system, and the buffer is used for balancing the excited pressure wave when the valve mechanism is in action. The bypass pipeline is turned on when the downlink instruction needs to be transmitted, and the excited pressure wave can be balanced by the buffer, so that the downlink instruction transmission precision is effectively improved.

The application belongs to the technical field of papermaking, and particularly relates to a process for producing cake tray paper by a long net large vat belt gluing machine paper machine. The process for producing cake tray paper by the long net large vat belt gluing machine paper machine has the following production process flow: pulp plate -> chain plate conveying -> pulper -> unloading pool -> refiner -> pulp pool -> pre-pulping pool -> pulping pump -> pressure screen -> headbox -> wire section -> press section -> vat -> gluing machine -> cylinder assembly -> calender -> winding section -> rewinding -> packaging and warehousing; by fully utilizing the vat equipment and surface gluing performance, the problems of poor original paper forming degree, stiffness, easy deformation after processing and difficult peeling are solved under the premise of meeting the breaking degree and transparency, the production cost is greatly reduced, the use requirement of food grade is met, and the process has a broad market prospect.

The utility model relates to a marine protection technical field, specifically is a marine oil absorbent electric spraying device, including frame structure, be provided with oil absorbent storage mechanism on the frame structure, and be provided with mixing mechanism on the frame structure, the mixing mechanism includes the explosion -proof motor and roller pump installed on the frame structure, the both sides of roller pump are linked with oil absorbent inlet and water -soluble solvent inlet respectively, the lower part of roller pump is connected with mixed liquid spraying port, the outlet of mixed liquid spraying port is detachably connected with extension injection assembly, the utility model has adopted the drainage mode of explosion -proof motor and roller pump pressure flow siphon drive to can avoid the possibility that general device oil absorbent cuts off the pure water of mixed or pure water cuts off oil absorbent, makes the mixture of oil absorbent and pure water more uniform and stable, and makes the injection pressure get effective control, is more favorable to the problem of the uniform consistency of oil absorbent spraying operation.

This invention relates to the field of hydraulic pumps. The invention discloses a hydraulic pump pressure control mechanism, comprising a hydraulic pump, with an electromagnetic on / off valve, a pressure compensation valve, and a hydraulically controlled shut-off valve mounted on the pump's housing. The electromagnetic on / off valve is connected to the pressure compensation valve and the hydraulic pump's drain oil passage via a first combined oil circuit, and to the pressure compensation valve and the hydraulic pump's inlet via a third combined oil circuit. The pressure compensation valve is connected to the electromagnetic on / off valve and the hydraulically controlled shut-off valve via a second combined oil circuit, and to the working chamber of the hydraulic pump's follower piston via a follower piston chamber oil circuit. The bottom of the hydraulically controlled shut-off valve is connected to the hydraulic pump's drain oil passage, and is connected to the working chamber of the follower piston via the second combined oil circuit and the first... A combined oil circuit is connected to the outlet of the hydraulic pump; the electromagnetic on / off valve has a P port, an R port, and a C port. The P port is connected to the first combined oil circuit, the R port is connected to the third combined oil circuit, and the C port is connected to the second combined oil circuit; the pressure compensation valve has a D port, an E port, a F port, a G chamber, and a first spring chamber. The D port is connected to the follower piston chamber oil circuit, the E port is connected to the first combined oil circuit, the F port and the first spring chamber are connected to the third combined oil circuit, and the G chamber is connected to the second combined oil circuit; the hydraulically controlled shut-off valve has a second spring chamber and a bore. The second spring chamber is connected to the second combined oil circuit, and the bore is connected to the first combined oil circuit. This invention solves the problem of wasted engine power caused by the hydraulic pump still outputting hydraulic oil with a certain pressure and flow rate when the hydraulic pump is unloaded; it also solves the problem that when downstream users of the hydraulic pump experience damage or oil leakage, the hydraulic pump continues to run with the engine, continuously outputting hydraulic oil with a certain pressure and flow rate, which can easily lead to the complete leakage of oil in the hydraulic system and oil tank, resulting in the paralysis of the hydraulic system and, in severe cases, endangering aircraft safety.

The application relates to the technical field of scroll compressors, and discloses a water-cooled oil-free scroll air compressor with a double-inlet and double-outlet water structure, which comprises a machine shell, a static scroll disc arranged in the machine shell, a dynamic scroll disc coupled with the static scroll disc, and a main bearing seat for supporting a crankshaft, the machine shell is internally provided with a first cooling loop and a second cooling loop which are independent of each other, the first cooling loop is arranged in the static scroll disc and comprises a profile line gradually expanding spiral water channel, a water inlet of the profile line gradually expanding spiral water channel is arranged in a central exhaust area of the static scroll disc, and a water outlet is arranged in an outer ring air suction area of the static scroll disc, and the second cooling loop is arranged in the machine shell. The profile line gradually expanding spiral water channel radiating from the center to the outer ring is constructed in the static scroll disc, the distribution rule of the heat flow density of the scroll disc radially decreasing is ingeniously matched, unnecessary fluid resistance in the peripheral low-temperature area is effectively reduced, and the precise engagement of the flow velocity distribution and the local heat exchange demand is realized under the premise that the pumping pressure does not need to be additionally increased.

This invention discloses a flow pattern identification method for mixed-flow gas-liquid pumps based on pressure pulsation signals. The method includes: collecting pressure pulsation signals from the pump under different gas contents and flow rates, and simultaneously recording flow pattern labels to form an original signal sample set; preprocessing the pressure pulsation signals and performing mode decomposition using variational mode decomposition to obtain eight intrinsic mode components; performing Hilbert-Huang transform on each intrinsic mode component to generate a two-dimensional time-frequency image; constructing and training a signal-image dual-channel deep neural network; and deploying the trained model on an online monitoring system for real-time flow pattern identification. This invention's flow pattern identification method for mixed-flow gas-liquid pumps based on pressure pulsation signals solves the problems of existing technologies, such as single features relying on manual design, feature distortion due to mode aliasing, and poor flow pattern identification accuracy and real-time performance.

The utility model discloses a kind of self-circulation mixing cylinders, including mixing cylinder body and mixing assembly;Mixing cylinder body includes the cylinder for rice flour mixing, negative pressure pump body, suction tube, circulation pipe and is used for the feeding hopper body of rice flour auxiliary material addition;Negative pressure pump body is set to cylinder one side;Suction tube one end is fixedly connected with negative pressure pump body input end, other end is communicated with cylinder bottom;The one end of circulation pipe is fixedly connected with negative pressure pump body output end, other end is communicated with cylinder top;Feeding hopper body is set in suction tube and is communicated with suction tube, and valve is set on feeding hopper body;Mixing assembly is set in cylinder;Mixing assembly includes mixing block and wedge groove;Mixing block is fixedly set on cylinder inner wall;Wedge groove is set on mixing block. The self-circulation mixing cylinder, simple and reasonable structure, ingenious design, by the pump pressure generated when negative pressure pump body works, can realize feeding and mixing, remove additional structure, reduce equipment configuration cost, and energy saving.

A modular combined oil supply system and control method for fatigue testing is disclosed, relating to testing equipment. It includes: a power unit comprising multiple units, including a power motor, a power oil pump, a cooling oil pump, and a pump pressure regulating valve block; wherein the power motor is mounted in the oil tank of the machine body via a power mounting bracket; the power oil pump and the cooling oil pump are connected to the side of the power motor and are driven to rotate by the power motor; the pump pressure regulating valve block is used to regulate the inlet oil pressure of the power oil pump. This invention employs a modular power unit structure design, allowing for flexible selection and activation of the corresponding number of power units based on the test conditions of the component under test, the number of servo cylinders configured, and the actual oil supply flow requirements. This enables compatibility with fatigue testing of components of different specifications and testing requirements, effectively improving the overall versatility and adaptability of the equipment.

The embodiment of the present application provides a pump displacement ratio correction method and device, which are used for solving the problems of engine speed drop and fuel consumption caused by sudden increase of engine load. The method comprises the following steps: at the initial moment of the current scheduling period, determining the original pump displacement of the main pump in the current scheduling period according to the oil demand flow and the engine speed; when a set condition is met, adjusting the filtering time of the output pump displacement according to the main pump pressure of the current scheduling period; wherein the set condition is that the original pump displacement is greater than the output pump displacement of the main pump in the last scheduling period, and the engine power of the last scheduling period is greater than a set threshold; and determining the output pump displacement ratio of the main pump in the current scheduling period according to the adjusted filtering time and the original pump displacement.