184results about How to "Increase effective power" patented technology

A method and apparatus for dynamically controlling forward and reverse link channel processing gain to minimize dropped connections and improve the reliability of hard handoffs is disclosed. The transmission bit stream of a forward or reverse link channel is allowed to become dynamic under controlled conditions in such a way as to take advantage of the inherit strengths that the concept of processing gain provides and thereby improve the probability of establishing and maintaining a forward or reverse link traffic channel. Dropped connections due to reverse link fades and dropped connections during call origination are minimized by allowing a MS to transmit reverse traffic channel data using dynamically adjustable data rates to increase the processing gain and the effective transmit power level. In addition, dropped connections during hard handoffs are minimized by using a special code channel and dynamically adjustable data rates to evaluate the proposed new link.

The invention relates to a method for mounting ship three-engine three-propeller engine shaft system, belonging to ship main shaft mounting technical field. The invention arranges a target support, tests the central line of the shaft system, positions and mounts stern axle tube, and mounts stern axle and propeller or the like, to confirm the installment accuracy of shaft system, and overcome the defects of prior art as hard control on installment size, large size error, and long installment period, to provide better art technical assurance to ship production.

The invention discloses a local-oscillation leakage automatic removing device, comprising a coupling capacitance used to test the local-oscillation leakage signal, an amplifier used to amplify the detected local-oscillation leakage signal, a high-frequency peak detector used for demodulation of the amplified signal and output DC signal, a programmable lag comparator used to compare the DC signal and reference signal after demodulation. According to the result of comparison, the control signal is exported to control the programmable current source to export compensation signals to remove local-oscillation leakage, and at the same time, control the digital signal processing module of the programmable lag comparator to change the size of he lag window. The invention is capable to remove the local-oscillation leakage in a CMOS wireless radio-frequency transceiver, and improve the effective power of signals.

Transmit and / or receive beamforming signal generation includes a voltage-controlled oscillator (VCO) for generating a lower or higher master frequency output signal in accordance with a selection of a lower or higher frequency carrier frequency. A local oscillator generates local oscillator signals in quadrature in response to the maser frequency output signal. One or more mixer stages generate sidebands in response to a received information signal and the local oscillator signals in quadrature. The one or more mixer stages generate an output information signal in response to high-side injection of lower sidebands of the developed sidebands when the lower frequency carrier frequency is selected, and generate the output information signal in response to low-side injection of higher sidebands of the developed sidebands when the higher frequency carrier frequency is selected. Multi-band operation of transmit and receive arrays can be performed.

The present invention relates to a filter device for filtering a fluid, in particular an oil filter. It has at least one filtering medium and a bypass for the filtering medium. Furthermore, an actuator is provided, which influences the flow of the fluid through the bypass as a function of a predetermined parameter of the fluid. The actuator is preferably controlled as a function of the viscosity of the fluid, a differential pressure of the fluid at the filtering medium, and / or the temperature of the fluid.

The invention relates to a high-precision brillouin scattering measuring system in an ultrashort optical fiber. The system comprises a laser; an input terminal of an optical fiber coupler is connected with the laser at an output direction of the laser; an output terminal of the optical fiber coupler successively passes a first polarization controller, an optical fiber isolator, and a detection optical fiber and then is connected to one end of a circulator; the other output terminal of the optical fiber coupler successively passes a second polarization controller and then is connected to an input terminal of a single sideband modulator; an output terminal of the single sideband modulator passes an optical fiber amplifier and then is connected to the other input terminal of the circulator; an output terminal of the circulator passes a photoelectric detector and then is connected with a first input terminal of a lock-in amplifier; an output terminal of the lock-in amplifier is connected with a data collection processing system; and a square wave signal generator is respectively connected with a second input terminal of the single sideband modulator and a second input terminal of the lock-in amplifier. Meanwhile, according to the invention, a stimulated brillouin scattering gaining process and a stimulated brillouin scattering loss process are utilized, so that a detection sensitivity on a whole of a sensing optical fiber is improved and influences of interference signals like end surface reflection can be avoided; moreover, costs are reduced.

The invention relates to a diesel engine fuel additive and the process for preparation, which is formed by the components whose mass ratio as following: amyl nitrate 10-40 parts, isooctyl nitrate 10-40 parts, manganese naphthenate 100-500 parts, iron naphthenate 50-802 parts, barium naphthenate 60-90 parts, naphthenates cerium 60-90 parts, barium dinonyl naphthalene sulphonate 100-150 parts, dicyclopentadienyl iron 20-60 parts, alkyl alcohol polyoxyethylene ether 100-150 parts, alkylphenol polyoxyethylene ether 150-250 parts and dimethylbenzene 80-150 parts. The invention provides a diesel engine fuel additive which can obtain synergistic effects of two types of additives, has the advantages of excellent chemical stability, lowering secondary discharge pollution, saving fuel oil, and can promote a particulate trap to regenerate and he process for preparation.

The invention discloses a bent connecting rod offset bent shaft mechanism and a bent connecting rod offset bent shaft motor, belonging to the bent shaft connecting rod mechanism of a piston explosive motor, and comprising a cylinder, a piston, a connecting rod, a bent shaft, a bent shaft crank, an inlet cam, an inlet rocker arm roller wheel, an outlet cam and an outer rocker arm roller wheel, wherein the circle center of the bent shaft is arranged in the mode of deviating from the median vertical line of the cylinder, and the offset is more than 35% of bent shaft radius; the connecting rod is the bent connecting rod, and the bending direction of the connecting rod is same with the rotation direction of the bent shaft; in the same cylinder, according to the cam shaft rotation direction, the intersection angle of the inlet cam is smaller than that of the outlet cam, and the difference of two intersection angles is equal to that 90 degrees subtract the dip angle difference of an upper dead center and a lower dead center on a 1 / 2 bent shaft. The invention changes the bent shaft position and is matched with a bent connecting rod, so that the offset bent shaft has the characteristics that the upper dead center and the lower dead center are asymmetric, and piston travel is bigger than bent shaft diameter; thus, engine torque is increased so as to effectively prolong torque duration as well as prolong burning and air inflow duration.

The invention discloses a short magnetic circuit reluctance motor, and double stator magnetic poles, a rotor core and a wound rotor. The three-phase 9 / 3 pole short magnetic circuit reluctance motor divides nine groups of double stator magnetic poles distributed on the circumference of a stator (1) at equal intervals into three sections in axial direction, wherein the length of the middle section is equal to that of a main magnetic pole and the middle section is manufactured by overlapping silicon-steel sheets; other main and auxiliary magnetic poles are manufactured into appropriate shapes by soft iron so that the three sections of main and auxiliary magnetic poles can be formed into the double stator magnetic pole with an annular groove for placing exciting windings after being combined together; then, the nine exciting windings (L1, L2, L3, L4, L5, L6, L7, L8 and L) are respectively arranged in each annular groove to obtain three-phase exciting windings (L1, L4, L7 and L2, L5, L8 and L3, L6, L9) on the circumference of the stator (1) in turn according to the rule of equilateral triangles; and then, a three-salient pole rotor core (3) consisting of a multi-cambered surface lug boss is arranged on a hollow rotor shaft lever (4) with internal thread and forms rotating connection with a stator part through a periphery connecting and fixing device of a motor.

Vehicle circulating pump includes electromagnetic drive device and leaves, said leaves are installed between the pump shell and the pump cover and are supported on the pump shell by axle, said electromagnetic drive device includes magnet conductor which is supported on the pump shell by axle, the magnet conductor is bound by coil around itself, the soil is connected with the control circuit, the main bulk of said leaves is circular column and is nested out the pump shell, the leaves main bulk and the magnet conductor in the pump shell are composed into inner and outer shrink-fit structure. The present invention has the advantages: good sealing performance, small noise and strong anti-electronic jamming, it avoids the ineffective start of motor, raises the effective power of the engine, reduces energy consumption, and also reduces engine waste gas emissions, it meets the environmental requirements and has long product life to make engine remain the best condition.

A method for operating a wind turbine which includes a rotor hub supporting a rotor blade is disclosed. The method includes: a) detecting changes in the aerodynamic performance of the rotor blade; b) determining a first control rule; c) determining a first power output information indicating a first power output based on the first control rule; d) changing an operational parameter and choosing a second control rule such that the first control rule is replaced by the second control rule; e) determining a second power output information indicating a second power output based on the second control rule. c) comparing the first and second power output information. If the second power output exceeds the first power output, repeating a)-f) with the second control rule being used as the first control rule in b); otherwise repeating a)-f), whereby a different second control rule is applied in d).

The invention discloses a charging method and device, a charger, equipment to be charged and a charging system. The charging method includes the steps that control current waves of the equipment to be charged are obtained, wherein the control current waves comprise positive current pulses, negative current pulses and current of which the value is equal to a reference current value; when the control current waves are the positive current pulses, the output voltage value of the charger is adjusted to be larger than the current output voltage value of the charger; when the control current waves are the negative current pulses, the output voltage value of the charger is adjusted to be smaller than the current output voltage value of the charger; when the control current waves are the current of which the value is equal to the reference current value, the output voltage value of the charger is kept unchanged. By the adoption of the method, the device, the charger, the equipment to be charged and the charging system, the output capacity of the charger can be sufficiently utilized for achieving rapid charging.

The invention discloses a swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle. The reaction kettle comprises a cylindrical kettle body which is arranged vertically. A discharge port, a liquid feeding port, and a gas feeding port are sequentially arranged from top to bottom on the side wall of the kettle body. A central shaft connected with an outside motor is arranged vertically in the kettle body. The reaction kettle is characterized in that three layers of vertically arranged swept-back half-pipe turbo agitators are arranged on the central shaft. 6-10 high-efficiency heat-exchange diversion rectification devices are horizontally uniformly distributed between the outer end of the swept-back half-pipe turbo agitators and the inner wall of the kettle body. 4-6 sheets of side wall diversion full baffles are uniformly distributed on the inner wall of the kettle body. A liquid jet distributor connected with the liquid feeding port and a gas jet distributor connected with the gas feeding port are arranged on the bottom of the kettle body. An overflow zone is arranged in the kettle body. Reaction products pass through the overflow zone and is collected from the discharge port. The swept-back high-efficiency hot-plate diversion rectification multiphase reaction kettle has the advantages of good multiphase system mixing effect, large heat-exchange area, and precise temperature control.

The invention discloses an energy-saving environment-protective lubricant with lubricating reinforcing and abrasion proof and squeezing proof effect for the lubricating part of kinds of mechanic equipment, which comprises the following parts: 5%-8% molybdenum disulphite with grain size at 30-5000nm, 5%-8% graphite powder with grain size at 30-5000nm, 5%-8% molybdenum oxide dialkyl dithiophosphate as antiwear agent, 10%-15% succinyl imines as dispersant, 10%-15% polymethacrylate ester as adhesive and residual liquid lubricating material. The invention can repair and fill the side-surface abrade by metal automatically to film rapidly and stably, which lengthens the lift of lubricating part of the mechanic equipment by one time and improves the effective efficiency by 4-10%, therefore saving the fuel by 10-15%, reducing the discharge of harmful gas and smoke obviously and the mechanic noise by 1-8 decibel.

The present invention discloses a partial reinforced particle piston and a manufacturing method thereof. The partial reinforced particle piston comprises a head, a skirt section and a pin base. The head comprises a piston top and a ring slot part. The piston top and the ring slot part are reinforced areas which are formed by distributing reinforced particles in piston matrix material. The skirt section is an non-reinforced area. The reinforced area and the non-reinforced area are combined by an alloy combination form. The partial reinforced particle piston not only increases the wearing resistance of the head of a piston and reduces the thermal expansion coefficient, but also ensures the good mechanical performance of the skirt section of the piston and realizes the continuous transition of the organization structure and performance of the partial reinforced area and the non-reinforced area; the effective power of an engine is improved; the service life of the piston is prolonged; in order to manufacturing the piston, the present invention uses a centrifugal casting method to assemble the reinforced particles in melted homogenous composite material at the head of the piston, and the manufacturing method has simple technology and low manufacturing cost.

The invention discloses a cooling water pump for an internal combustion engine. The cooling water pump comprises a water pump shell, a rotary shaft, a cover plate and an impeller. A cavity is formed in the water pump shell, the rotary shaft is mounted in the middle of the cavity through a bearing, and the impeller can be mounted on the rotary shaft in the manner of rotating around the axis of itself. The cover plate is fixedly connected with the side, provided with the cavity, of the water pump shell. The water pump shell is provided with a water inlet and a water outlet, a separation tongue is machined in the position, close to the water outlet, in the cavity, a volute chamber passageway is machined between the separation tongue and the water outlet, and the volute chamber passageway is in an arc shape. The impeller comprises a hub, a wheel disc and blades. The hub is fixedly connected with the center of the wheel disc, the blades are in arc sheet shapes, and the at least two blades are evenly arranged on the wheel disc around the hub in a spaced manner. At least two openings are formed in the wheel disc, and the openings are formed between the blades. According to the cooling water pump for the internal combustion engine, the openings are formed in the wheel disc, the size and mass of the impeller are reduced, the available volume in the cavity is increased, and under the condition of not changing the boundary dimension of the water pump and a connector, the flow of the water pump is increased, and energy consumption is reduced.

The most difference for one kind of the positive-displacement engine from capacity-invariable engine is, the CVE has double pistons interlinked mutually in every cylinder. Inner piston connects with the piston pin by the connecting rod. Outer piston with a ring sits on inner piston supported by the spring. The characteristic of this engine is: Every stroke volume changes diversity. In exhaust stroke, outer piston gets to the tiptop of the cylinder, waste gas almost discharges (exhaust ratio can be to 95%˜98% in theory), compression ratio is improved (≧12); In intake stroke, outer piston continues moving by the inertia at the end of the intake stroke, the air intake volume increases. So it realizes the automatic supercharging and the fuel efficiency and emission have improved. Since outer piston has the effect of storing energy, the peak pressure and the speed of the pressure raising have been reduced. Thereby, the force on the structure is lower down and the engine weight could be lightened, the smoothness of operation is also improved. Also the peak pressure shifts to right, the torque output increases and engine efficiency is improved. There are great performance improvements of this positive-displacement engine then capacity-invariable engine.

Disclosed is a hermetically enclosed coolant compressor (1) comprising a cylinder housing (3) and a piston (6) which is guided along a defined piston bearing area (9) within a piston bore (8) of the cylinder housing (3) and is hinged, by means of a connecting rod (7), to a crankshaft (5) that is driven by an electric motor (13). The crankshaft (5) is mounted in a bearing element (2) that is preferably designed in a monolithic manner along with the cylinder housing (3). The piston bore (8) is closed by a cylinder head (15) encompassing a valve disk (16) in a first end region (8a) while being open for accommodating the piston (6) in a second end region (8b) facing the crankshaft (5). According to the invention, the piston bore (8) has a free-running section (10) that adjoins the piston bearing area (9) and is arranged in the second end region (8b) of the piston bore (8). The width (10') of the internal opening of the free-running section (8b) is greater than the diameter (9') of the piston bearing area (9) in order to prevent contact between the piston (6) and the cylinder housing (3) in said section.

A method for operating a wind turbine which includes a rotor hub supporting a rotor blade includes: a) detecting changes in the aerodynamic performance of the rotor blade; b) determining a first control rule; c) determining a first power output information indicating a first power output based on the first control rule; d) changing an operational parameter and choosing a second control rule such that the first control rule is replaced by the second control rule; e) determining a second power output information indicating a second power output based on the second control rule. c) comparing the first and second power output information. If the second power output exceeds the first power output, repeating a)-f) with the second control rule being used as the first control rule in b); otherwise repeating a)-f) a different second control rule is applied in d).

An energy storage transmission mechanism comprises a transmission shaft (1) and a driving shaft (2). The mechanism is characterized in that the transmission shaft (1) is provided with a slide hole (101); a pair locking bolt (3) is installed in the slide hole (101) and can slide; the upper end surface of the transmission shaft (1) is provided with a track slope groove (102); the inner end surface of the driving shaft (2) is provided with a releasing convex platform (201) corresponding to the track slope groove (102); the upper end surface of the transmission shaft (1) is provided with a lockingconvex platform (103); a positioning shaft (202) which is stretched out of the driving shaft (2) is arranged in the positioning hole (104) of the transmission shaft (1); one end of an energy storagetension spring group (4) is installed on the pair locking bolt (3) and the other end is installed on a driving finger (204) stretched out of the driving shaft (2); and during the rotation process of the driving shaft (2), the driving finger (204) stretches the energy storage tension spring group (4) so that energy storage is performed. In the invention, the structure is simple, reliability is high, through a switch mechanism, the effective power of energy storage and transmission is increased, a mechanism load is reduced, and the motion reliability and the mechanical life of the mechanism areincreased and prolonged.

Disclosed are multistage variable-temperature and variable-pressure steam heating device and heat exchange system thereof, in the technical field of boiler steam generation. The multistage variable-temperature and variable-pressure steam heating device comprises an input unit, at least one feedback unit and at least one heating unit with an atomizer set. An input end of the output unit is connected with an output end of the heating unit and an output end of each feedback unit. A feedback end of each heating unit is connected with an input end of one feedback unit. The atomizer set is disposed at an input end of the corresponding feedback unit. A heat exchange cylinder is electromagnetically inductively heated according to the fast conduction feature of steel and by semiconductor sensing technology. Liquid water is dispersed into 360-degree heat exchange water curtains with small unit size, light weight and kinetic energy by array atomizers, and the water curtains are subjected to fast heat exchange of a multistage heat source by surface of a heat exchanger cylinder at 200-400 DEG C to generate superheated steam, and the original steam generation way using a boiler drum is broken through.

The invention relates to a charging method, a charging device, a charger, to-be-charged equipment and a charging system. The charging method comprises the following steps: acquiring a control current wave from the to-be-charged equipment, wherein the control current wave comprises a positive current pulse, a negative current pulse and a current with a current value equal to a reference current value; when the control current wave is the positive current pulse, adjusting the output voltage value of the charger into the voltage value more than the current output voltage value of the charger; when the control current wave is negative current pulse, adjusting the output voltage value of the charger into the voltage value less than the current output voltage value of the charger; and when the control current wave is the current with the current value equal to the reference current value, maintaining the output voltage value of the charger to be unchanged. By adoption of the method, the device, the charger, the to-be-charged equipment and the charging system, rapid charging can be realized by completely utilizing the output capacity of the charger.

The invention discloses an anti-overload hydroelectric power device. The anti-overload hydroelectric power device structurally comprises an anti-overload detection box, an electric valve, a water turbine, a base, a connecting shaft and a power generator. The electric valve is arranged above the water turbine. The electric valve is fixedly connected with the water turbine through a flange. The bottom of the water turbine is fixedly connected with the base through bolts. An output shaft of the water turbine is connected with the connecting shaft. The connecting shaft is connected with the powergenerator. The anti-overload detection box comprises a detection box shell, an air inlet duct, a detector, a detection driver, a connecting shaft gear and a connecting shaft support frame. The connecting shaft support frame is arranged in the detection box shell. By the adoption of the equipment, the water flow can be adjusted automatically to reach the stable rotating speed, the effective power of the access to a grid is increased, and the stability of the grid is improved.

The invention provides an intelligent control dust removal system and method, wherein the front end and the rear end of a dust removal unit are each provided with a particulate matter sensor, the front end and the rear end of a sanitation vehicle are each provided with a dust accumulation load sensor, and an atmospheric environment sensor is installed on a vehicle roof. According to the invention, different parameters monitored by three sensors are matched with an internal algorithm of a main control unit, so that the filtering effect of a dust removal unit can be monitored in real time, and the power of an internal cyclone dust collector, an electrostatic dust collector and a water filtering dust collector is adjusted according to the concentration of particulate matters sucked into dust-containing air to monitor the particle size of the dust-containing particles, so that equipment for efficiently filtering fine dust, such as electrostatic dust collection and the like, can be accurately controlled; the atmospheric particulate concentration and the air outlet concentration are calculated to monitor the purification effect of the equipment, so that consumables and maintenance time are accurately guided, and the optimal use state of the equipment is maintained; and the dust accumulation load concentration of the front portion and the rear portion of the vehicle is measured, the road cleaning effect of data checking equipment is used, the road pollution condition is discriminated, the fan power is adjusted in real time, and efficient cleaning of different polluted road sections is achieved.

The invention belongs to the engine manufacturing technical field, in particular relating to a direct injection engine for injecting water and oil into a cylinder. The invention provides a direct injection engine, which comprises the cylinder, a combustion chamber, a water supply device, an oil supply device and an electronic control system which can simultaneously perform water injection and oil injection, wherein, a gas inlet valve, a gas outlet valve and a spark plug are respectively arranged above the combustion chamber; a water nozzle and an oil nozzle which are electrically connected with the electronic control system are respectively arranged on the cylinder; the water nozzle and the oil nozzle are arranged oppositely; and the water supply device and the oil supply device are respectively communicated with the water nozzle and the oil nozzle. Compared with the prior art, the direct injection engine not only can realize fuller combustion of oil, save the fuel oil and prolong the service life of the engine but also can reduce the pollutants in the exhaust gas exhausted by the cylinder and play a part in environmental protection.

The invention discloses physical layer security methods based on a non-optimal user cascading scheme in a multilayer heterogeneous network and belongs to the technical field of wireless communication.According to the methods, a multilayer heterogeneous network model in a passive eavesdropping scene is analyzed through description of node distribution density, a base station transmitting power, path loss indexes and a bias factor of each layer. The problem that the optimal base stations are difficult to connect is solved by the provided method based on the non-optimal user cascading scheme. According to the scheme, network nodes are modeled into a homogeneous Poisson point process through utilization of stochastic geometry. On the basis of a stochastic geometry mathematical tool, a physical layer security probability expression of the multilayer cellular heterogeneous network is inferred. Influence of the transmitting powers, security thresholds and eavesdropper density on a system security probability is compared and analyzed according to obtained security probabilities. The method has obvious advantages in the aspect of improving physical layer security of the system. A network coverage probability and average user capacity are improved. Throughput and spectral efficiency of the network are also improved.

The invention relates to an opposed mechanical supercharging four-stroke internal combustion engine in the technical field of the internal combustion engine. The opposed mechanical supercharging four-stroke internal combustion engine comprises air cylinders, pistons, connecting rods, air inlet mechanisms, air inlet valves, air bleeding mechanisms, air bleeding valves, a connecting pipe and a crankshaft; the air inlet mechanisms and the air bleeding mechanisms are arranged at the top ends of the air cylinders; the air inlet valves are arranged in the air inlet mechanisms; the air bleeding valves are arranged in the air bleeding mechanisms; the two ends of the connecting pipe are respectively connected with the first air inlet mechanism and the second air bleeding mechanism; and the two ends of the connecting rods are respectively connected with the crankshaft and the pistons. In the working process, the second piston can use the mechanical energy of the first piston through a crankshaft connecting rod mechanism; by controlling the timing of the air inlet valves and the air bleeding valves, the second piston can be used for supercharging air sucked by the second air cylinder, thereby enabling the first air cylinder to suck more air and improving the effective power of an engine. The opposed mechanical supercharging four-stroke internal combustion engine is reasonable in design and simple in structure and is suitable for a mechanical supercharging system of a four-stroke engine.

The invention relates to a three-way catalyst with a flow rectifier. The three-way catalyst comprises a shell, a catalyst carrier, a liner, an inlet passage and an exhaust passage, wherein the inlet passage is connected with one end of the shell, and the exhaust passage is connected with the other end of the shell. The three-way catalyst also comprises a catalyst flange. The catalyst flange is connected with the inlet passage; the flow rectifier is arranged in the catalyst flange and is located in the air inlet of the inlet passage. The flow rectifier comprises an electromagnetic ring device, an electronic control unit and a plurality of blades, wherein the electromagnetic ring device is coaxial with the catalyst flange; the electronic control unit is connected with the electromagnetic ring device and is used for controlling the electromagnetic ring device to work; the blades are arranged along the circumferential direction of the electromagnetic ring device and are controlled by the electromagnetic ring device to rotate; each blade is connected with the electromagnetic ring device by a connecting rod. According to the three-way catalyst provided by the invention, the blades can be changed within a certain rotation angle range, and are completely matched with all instantaneous conditions of an engine, and therefore, the conversion efficiency and the use ratio of the three-way catalyst are effectively improved, and moreover, maximum effective power is output by the engine.

The invention discloses a brushless electronic water pump. The brushless electronic water pump comprises a shell body, an isolating sleeve and an upper cover which can be detachably fixed. The isolating sleeve divides the shell body and the upper cover into an installing chamber and a fluid chamber. A stator assembly and a PCB are fixed into the installing chamber. A rotor assembly is installed in the fluid chamber in a rotating manner. The upper cover is provided with a water inlet and a water outlet. The rotor assembly comprises an impeller and a connecting drum. A wear-resisting lubricating insert is fixedly inserted into an inner hole of the connecting drum. A center hole is formed in the wear-resisting lubricating insert. A magnet yoke drum is fixedly installed outside the connecting drum concentrically in a sleeving manner. A magnet ring drum is fixedly installed outside the magnet yoke drum concentrically in a sleeving manner. The isolating sleeve is provided with a locating center shaft which is inserted into the center hole. The shell body is provided with a heat dissipating device connected with the PCB in a heat-conducting manner. According to the brushless electronic water pump, a bearing does not need to be arranged on a rotor, no water inlet space is occupied, the reliability of the brushless electronic water pump is improved, and the service life of the brushless electronic water pump is prolonged.