24results about How to "Increase inertia" patented technology

The invention relates to the technical field of heat dissipation devices, in particular to a flow compensation drainage fan which comprises a fan body and a drainage device, and at least two jet flow holes are formed in the surface of the side, close to the drainage device, of the fan body; the drainage device is provided with an open drainage cavity which is defined by a top wall, a bottom wall and a side wall and enables airflow to be sprayed out in the set direction, the airflow generated by the fan body is sprayed out through the jet flow holes, surrounding air is entrained, and primary drainage is formed. The through-flow areas of the drainage channels are sequentially increased in the set direction, or the drainage holes are formed in the designated positions of the wall face of the drainage device, so that at least one time of secondary drainage can be generated when airflow flows in the open drainage cavity, and then the airflow finally sprayed out of the side wall flow outlet is substantially increased, so that the heat dissipation efficiency is improved.

The invention relates to the technical field of fault detection, in particular to mobile power transmission and distribution line fault detection and positioning equipment, which comprises a supporting plate, a power transmission and distribution line fault detection positioning device and a power transmission and distribution line fault detection positioning device, the detection device is used for carrying out fault detection on the power transmission and distribution line, and the bottom of the detection device is fixedly connected with the top of the supporting plate; the suspension device is used for driving the fault detecting and positioning equipment to move along the surface of the cable, the equipment is integrally hung on the cable through the suspension device, the suspension device is limited through the locking assembly, then the driving motor drives the guide wheel to rotate, and the equipment can integrally move along the surface of the cable; the detection efficiency is greatly improved, the problem that it is difficult for pedestrians to climb cables is solved, by arranging the locking assembly, the possibility that equipment falls off accidentally is reduced, and potential hazards to surrounding personnel and facilities are reduced.

The invention provides an inertia adaptive optimization control method for electric propulsion of a hydrogen fuel cell ship, and the method comprises the steps: building an equivalent output model of each power source during the steady-state operation of the hydrogen fuel cell ship, taking the equivalent model as a mixed potential function, and analyzing a system signal stability criterion; inertial parameters and damping parameters required by the system based on the mixed potential function are obtained by inputting ship working conditions and hydrogen fuel cell working conditions; power output is realized by performing frequency division control on demanded power in the system; and an energy storage unit in the system is controlled by a virtual direct current machine, so that the inertia requirement of the system is realized, and the dynamic characteristic of the system is improved.

The invention provides a virtual synchronous generator multi-machine parallel power distribution method, which belongs to the field of motors and power electronics, and comprises the following steps: 1, initializing necessary parameters, and monitoring the state of a power grid in real time; 2, predicting and controlling the dynamic response of the VSG by establishing a small signal model of VSG parallel operation; step 3, dynamically adjusting operation parameters of the VSG; and 4, executing a power distribution strategy by the system, distributing the calculated power to each VSG, and monitoring the process to ensure the uniformity of power distribution. According to the method, power distribution is carried out by preferentially utilizing photovoltaic output, the utilization rate of renewable energy sources is remarkably improved, meanwhile, optimal distribution of loads between the parallel virtual synchronous generators is achieved, the inertia and damping of the system are optimized, and the optimal distribution of the loads between the parallel virtual synchronous generators is achieved through a self-adaptive adjustment control strategy. And the advantage of parameter adjustability of the virtual synchronous generator is fully exerted, so that the control effect is further improved, and the stability of the power grid is enhanced.

The invention discloses a stability improvement control method for an offshore wind power low-frequency networking system, and the method comprises the steps: designing a low-frequency power grid stability control module in a land M3C converter control strategy, achieving the reasonable distribution of the power of different M3C converters in an offshore wind power low-frequency AC power grid, and avoiding the overcurrent problem; the inertia of an offshore wind power low-frequency networking system can be improved, the stability of a low-frequency power grid during offshore wind power output fluctuation is improved, and the method has a good application prospect.

The embodiment of the invention relates to the technical field of federated learning and information security, in particular to a federated multi-target scheduling method and system for industrial control crowdsourcing testing, which is characterized in that sensitive data such as ability, experience and the like of a tester are only reserved at a local terminal by constructing a framework combining local feature coding and federated model training, so that the test efficiency is improved, and the test efficiency is improved. Outward transmission is not carried out; only the model update quantity after the privacy enhancement processing such as gradient cutting and differential privacy noise injection is uploaded to the federated matching learning server, and only the model update quantity after the privacy enhancement processing is uploaded to the federated learning server, so that the leakage risk of concentrated data storage is avoided from the source, the requirements of privacy regulations such as GDPR and the like are completely met, and the reliability of the system is improved. Compared with traditional privacy technologies such as homomorphic encryption, the method has the advantages that the calculation and communication overhead is greatly reduced, the design of local matching degree calculation is matched, the task matching response speed is greatly increased, and the real-time requirement of industrial control system testing is met.

The invention discloses a rotating mechanism suitable for a liquid fertilizer spraying device, which is arranged on a fertilizer conveying pipeline of the liquid fertilizer spraying device and comprises a cylinder body, a fixed flange, a rotating flange and a transmission mechanism, and the fixed flange and the rotating flange are fixedly and movably sleeved on the outer sides of the lower part and the upper part of the cylinder body respectively; the transmission mechanism comprises a motor, and a transmission shaft of the motor is fixedly connected with the rotating flange; wherein the fertilizer conveying pipeline comprises a fertilization tank car butt joint pipe section and a bent pipe section, the fertilization tank car butt joint pipe section is in butt joint through a fixed flange, the bent pipe section is in butt joint through a rotating flange, and the fertilization tank car butt joint pipe section is communicated with the bent pipe section through a barrel of a rotating mechanism; when the motor is started, the power of the motor is transmitted to the rotating flange, and the rotating flange rotates relative to the fixed flange, so that the spraying direction of the liquid fertilizer spraying device is adjusted.

The utility model relates to the technical field of infusion apparatuses, in particular to an assembly type multi-layer precision filtering infusion apparatus which comprises a dropper body, a dropper cap and a first-layer filtering membrane, the top of the dropper body is detachably provided with the dropper cap, and the first-layer filtering membrane is installed in an inner cavity of the dropper cap in a hanging mode. The bottom wall of the first-layer filter membrane is provided with a second-layer filter membrane in an attached manner, the first-layer filter membrane and the second-layer filter membrane are distributed in a concave arc shape, the first-layer filter membrane comprises a pressed membrane edge covering part, a nuclear pore homogeneous membrane, a ventilation groove and a guide pattern, and the nuclear pore homogeneous membrane is arranged at the lower part of the pressed membrane edge covering part; the utility model solves the problems that in the prior art, a drip cup in an infusion apparatus simply plays roles in displaying the dripping speed and exhausting air for the first time, the function is single, for liquid medicine needing to be filtered precisely, an additional filtering piece needs to be arranged in a hose channel, the dripping and draining efficiency can be influenced, the cost is high, and an additional filtering element needs to be manufactured.

The invention discloses a cooperative control method for a floating type photovoltaic-hybrid energy storage system, and the method employs a flexible connection and semi-tensioning mooring design, and is suitable for a 0-degree head wave long-period working condition. Improving maximum power tracking control, and inhibiting power point oscillation based on a partition variable step size and a prediction power algorithm; hybrid energy storage power is distributed through a low-pass filter, a storage battery and a super capacitor cooperatively process high / low frequency fluctuation, and the service life is prolonged by combining charge partition management; a virtual synchronous generator VSG adaptive control strategy is provided, an improved particle swarm optimization algorithm is adopted to optimize a J / D initial value, and frequency fluctuation is dynamically suppressed; an optical storage grid-connected system is established for verification, and the VSG technology enables the power frequency fluctuation to be quickly stabilized, thereby guaranteeing the stable operation of the system.

The utility model discloses a stator iron core structure for a motor, relates to the technical field of stator iron core structures, and aims to solve the problem that when a conventional stator iron core is installed on a motor to work, the stator iron core needs to be driven to rotate only by consuming large kinetic energy when the motor drives the stator iron core to rotate because the structure is relatively simple. Comprising a stator iron core main body, a through hole is arranged on the stator iron core main body, the through hole and the stator iron core main body are integrally arranged, the stator iron core also comprises a matching connection jack, the matching connection jack is arranged on the stator iron core main body, and the matching connection jack and the stator iron core main body are integrally arranged. A matched connection inserting hole is formed in the inner wall of the through hole, a limiting groove is formed in the inner wall of the matched connection inserting hole, the limiting groove and the matched connection inserting hole are integrally formed, an inertia sliding structure is arranged on the inner wall of the through hole, the inertia sliding structure is connected with the inner wall of the through hole in a welded mode, and a sliding groove is formed in the inertia sliding structure.

The invention relates to the technical field of silicon dioxide materials, in particular to anti-aging quantum dot silicon dioxide and a preparation method and application thereof. The preparation method comprises the steps that silicon dioxide or silicic acid and a carbon source are subjected to first-stage calcination in a vacuum furnace, the first-stage calcination temperature is 300-750 DEG C, the first-stage calcination time is 10 min to 8 h, then air is introduced for second-stage calcination, the second-stage calcination temperature is 300-750 DEG C, and the second-stage calcination time is 10 min to 8 h. According to the anti-aging quantum dot silicon dioxide and the preparation method thereof, the anti-ultraviolet and anti-aging properties of the material are compounded and enhanced by utilizing the quantum dot effect and the oxygen vacancy effect, and the anti-aging quantum dot silicon dioxide is added into a matrix or sprayed on the surface of the matrix, so that the ultraviolet can be effectively prevented, and the aging of the material is prevented.

The invention discloses a high-wear-resistance transparent MOPP composite label film base material and a preparation method thereof, the high-wear-resistance transparent MOPP composite label film base material comprises polypropylene master batch, polytetrafluoroethylene particles, silicon dioxide and graphene oxide, the silicon dioxide and the graphene oxide have high strength and high hardness, the polytetrafluoroethylene particles have lubricity, and both the polytetrafluoroethylene particles and the silicon dioxide have good inertia; the transparency of the polypropylene can be ensured while the wear resistance of the polypropylene is improved, the material has oxidation resistance, and the defect that in the prior art, the wear resistance and the transparency of a uniaxial stretching polypropylene material are reduced in the using process is overcome; a polypropylene mixed material is firstly subjected to low-temperature stretching and then subjected to high-temperature stretching, bubbles and gaps in the material are reduced through low-temperature stretching, molecular chains of the material are more effectively arranged and oriented at a higher temperature through high-temperature stretching, the crystallinity and orientation degree of the material are improved, and the wear resistance and transparency of the material can be improved; and oxidation can be resisted by virtue of uniform and compact texture, so that the oxidation resistance is improved.

The invention discloses a transient frequency support control method considering the low voltage penetration characteristic of a converter, and relates to the field of electrical engineering, and the method comprises the steps: collecting the voltage data and frequency data of a power grid through a real-time monitoring sensor; based on the acquired power grid voltage data, carrying out converter voltage low-pass-through characteristic detection to obtain a voltage low-pass-through state; according to the voltage low penetration state, starting an adaptive response strategy, and adjusting a power instruction; based on the power grid frequency data, starting a virtual synchronous machine control algorithm according to the adjusted power instruction, and adjusting power output; a reinforcement learning algorithm is used to carry out cooperative adjustment on the voltage low-penetration adaptive response strategy and the virtual synchronous machine control algorithm, and the state of the power grid is recovered; according to the invention, through cooperative adjustment of the self-adaptive response strategy of the voltage low penetration state and the virtual synchronous machine control algorithm, the effect of the converter in power grid frequency adjustment is effectively improved, and the stability and reliability of the power grid frequency are enhanced.

The utility model provides an entertainment gun model with vibration feedback, which comprises a gun body, a handle arranged at the lower part of the gun body, a chambering sliding sleeve capable of relatively sliding back and forth connected to the top of the gun body, and a sliding assembly capable of relatively sliding back and forth connected to the inside of the gun body, a driving device capable of pushing the sliding assembly to slide back and forth is arranged in the gun body, and the sliding assembly is connected with the loading sliding sleeve so that the sliding assembly can drive the loading sliding sleeve to slide in the sliding process. The entertainment gun model with the vibration feedback is diversified in function and capable of improving user experience.

This utility model relates to the technical field of triangular sign devices, specifically to a highly stable triangular sign, comprising a shell and a triangular sign body. The triangular sign body is hinged to one end of the shell. A receiving groove is formed at the top of the shell, and a movable base is installed within the receiving groove. A first rotating block is slidably connected within the movable base. The first rotating block is connected to a second rotating block via a connecting rod. The second rotating block is fixedly connected to the triangular sign body. A first return spring is provided within the movable base, and a limiting block is provided at the top of the movable base. A ejection groove is formed near the hinge point on the limiting block. A sliding groove is formed at the top of the first rotating block, and an ejection block adapted to the ejection groove is slidably connected within the sliding groove. A second return spring is provided within the sliding groove. This utility model effectively improves the stability of the device.

The invention provides a catalyst for activating persulfate as well as a preparation method and application of the catalyst, and belongs to the technical field of catalytic materials and the technical field of water treatment. The preparation method comprises the step of calcining a mixture of graphite-like carbon nitride and coal to obtain the catalyst for activating persulfate. According to the catalyst for activating the persulfate, graphite-like carbon nitride serves as a nitrogen source, coal serves as a carbon source, the catalyst for activating the persulfate is prepared through a simple calcination method, the problem of catalytic inertia of the coal is solved, the yield is high, further purification is not needed, the catalyst can be directly used, the preparation process is simple and convenient, reaction conditions are universal, and the catalyst has high application value; the industrial production is convenient.

The invention relates to a VSG (Virtual Synchronous Generator)-based compensation control system of a network construction type railway power regulator. The VSG technology is fused into an RPC traditional compensation control system, the power grid current compensation effect of the RPC is achieved, meanwhile, the rotation inertia of a traditional power grid is injected into a contact network through the creativity of the VSG, and the impedance multiplication effect caused by the fact that the RPC is connected into the contact network is controlled and relieved through a voltage source of the VSG; the overall inertia of the power grid is improved by using the voltage source characteristics of the VSG, and the stability of the power grid is improved.

The utility model discloses a circular saw blade with precise alloy cutting teeth, which comprises a circular saw blade main body, a thickening component and inertia components are arranged on two sides of the circular saw blade main body, a plurality of groups of inertia components are arranged in the thickening component, and a cutting sawtooth component is arranged at the edge of the circular saw blade. The inertia assembly can increase the inertia of the circular saw blade main body during rotation, the cutting sawtooth assembly can cut an object, then when the device is used, a worker can firstly connect the device with driving equipment, then the cutting object is cut, the driving equipment can be started, and then the circular saw blade main body is driven to rotate; when the circular saw blade body rotates, the inertia assembly can increase the rotation inertia of the circular saw blade, the circular saw blade body can rapidly rotate at a high speed, and then the device can maintain the original rotation speed through the inertia assembly after the hardness of the circular saw blade body is increased.

The application relates to the technical field of micro fans, in particular to a multi-jet-hole guide fan, which comprises a fan body and a guide device arranged on one side or both sides of the fan body through a gap, at least two jet-hole units are arranged on the side of the fan body close to the guide device, and each jet-hole unit comprises at least two jet holes arranged at intervals, in the application, the design of a single first guide channel with multiple jet holes can help to expand the suction range when the airflow sprayed by the multiple jet holes enters the corresponding first guide channel after passing through the guide cavity, meanwhile, the one-to-many mode can reduce the local pressure peak value, inhibit the formation of turbulent flow and the impact on the wall surface of the first guide channel, and is beneficial to improving the flow and reducing the noise; on the other hand, the setting of the convex part can force the circumferential gas to smoothly turn along the surface of the convex part, reduce the airflow separation area, and reduce the instability of the shear layer.

The invention provides a preparation method and an application method of a composite modified coal pitch binder, and relates to the technical field of coal pitch binder modification. The preparation method of the composite modified coal pitch binder comprises the following steps: firstly, selecting titanium boride as a template, coal pitch as a carbon source and potassium hydroxide as an activating agent; fully mixing the three components in proportion to obtain a mixture; carrying out high-temperature heating treatment on the mixture, and cooling to obtain a heat-treated mixture; then crushing, washing and drying to obtain a titanium boride-graphene oxide composite modifier, and adding the titanium boride-graphene oxide composite modifier into asphalt to prepare the titanium boride-graphene oxide composite modified coal asphalt binder. The titanium boride-graphene oxide composite modified coal pitch binder has the beneficial effects that the strength, sodium expansion resistance and structural stability of a carbon / graphite electrode are improved through a modification mechanism of the titanium boride-graphene oxide composite modified coal pitch binder, and carbon emission in the electrode preparation process is reduced, so that the ecological environment is protected.

The present invention discloses a balance wheel assembly mechanism, which relates to the technical field of mechanical watch accessories, including a main plate, a sapphire plate, a swing plate, a shock absorber, a swing shaft and a balance wheel, wherein the sapphire plate is mounted on the lower surface of the main plate, the swing plate is fixedly mounted on the upper surface of the main plate, and the swing plate includes a support portion and a mounting portion, and the support portion and the mounting portion form a "T"-shaped structure. The present invention arranges a sapphire plate and a swing plate of a "T"-shaped structure, and the sapphire plate and the swing plate can realize the positioning of the swing shaft through the shock absorber. The sapphire plate is light-transmissive and can be engraved, which can improve the aesthetics of the mechanical watch, and the swing plate of the "T"-shaped structure reduces the space occupied while realizing the support and positioning of the swing shaft, and has a small shielding range for the balance wheel, which is convenient for observing the rotation of the balance wheel during use or maintenance, so as to achieve the effect of improving the aesthetics and practicality of the mechanical watch.

The present invention discloses a composite tube for a disposable infusion set and a preparation process thereof, belonging to the technical field of medical devices. First, the preparation process of the composite tube for a disposable infusion set comprises the following steps: mixing polyvinyl chloride resin, a light-shielding modifier, a lubricant and a plasticizer at 110 to 120°C for 1 to 2 hours, then extruding and granulating at an extrusion temperature of 135 to 140°C to obtain a modified polyvinyl chloride resin, and then co-extruding low-density polyethylene and the modified polyvinyl chloride resin to obtain a composite tube for a disposable infusion set with an inner layer of a low-density polyethylene layer and an outer layer of a modified polyvinyl chloride layer. The composite tube prepared by the present invention is a double-layer structure, with an inner layer of low-density polyethylene and an outer layer of modified polyvinyl chloride prepared by the present invention. Compared with the existing polyvinyl chloride infusion tube, the present invention aims to achieve the purpose of reducing the transmittance of light in the wavelength range of 290 to 450nm by adding a light-shielding modifier to the polyvinyl chloride resin.

The present invention discloses a DC microgrid voltage control method, system, device and medium based on model prediction power compensation, the method includes: using a virtual synchronous motor inertia control method as an inertia control outer loop to provide a DC microgrid bus reference voltage; using a model prediction power compensation voltage control method as a control inner loop to track the DC microgrid bus reference voltage; the model prediction power compensation voltage control method specifically includes: establishing a current prediction equation and an improved voltage prediction equation for a bidirectional DC / DC converter with energy storage; performing additional compensation on the inductor current reference value; taking the DC microgrid bus reference voltage value as the main control target, and the inductor current reference value after adding the compensation current as the secondary control target, designing a power compensation target function, and providing a power compensation amount based on the target function. The present invention reduces the bus voltage mutation caused by the power fluctuation in the network to the DC microgrid bus voltage, and improves the dynamic performance of the DC microgrid.

The invention discloses an anti-corrosion and anti-stick coating and its application. The anti-corrosion and anti-stick coating comprises a base material and a surface material. The base material comprises alkaline silica sol, neutral or alkaline α-alumina powder, titanium dioxide, porcelain clay, sodium carboxymethyl cellulose, and polyethylene glycol; the surface material comprises alkaline silica sol, neutral or alkaline α-alumina powder, hexagonal boron nitride, titanium dioxide, sodium carboxymethyl cellulose, and polyethylene glycol. The coating is neutral or weakly alkaline. After being brushed on the surface of a ceramic roller to form a coating, it is not easy to react with a ternary alloy phase, so that the coating and the alloy phase will not adhere together due to chemical reaction, thereby protecting the ceramic roller body and extending the service life of the ceramic roller. The anti-corrosion and anti-stick coating disclosed in the invention is a water-based coating, which is non-toxic and easy to clean; it has high temperature resistance, maintains good lubricity and inertness at high temperatures, and has a maximum use temperature of 1000°C in an oxidizing atmosphere and a maximum use temperature of 2200°C in an inert or reducing atmosphere.