33results about How to "Eliminate ills" patented technology

The invention discloses a seamless steel pipe for a long pipe trailer and a manufacturing method for the seamless steel pipe. The outer diameter of the seamless steel pipe is 630 to 720mm, the wall thickness is 18 to 30mm, and the length is 10,000 to 12,500mm. The manufacturing method comprises the following steps of: 1) rechecking a pipe blank, and turning a chuck; 2) performing shot blasting treatment on the pipe blank by using an outer shot blasting machine and an inner shot blasting machine respectively; 3) performing surface quality inspection, and polishing; 4) washing the pipe blank, and performing phosphate treatment; 5) saponifying the pipe blank for a first time; 6) performing cold drawing on the pipe blank for a first time; 7) polishing the inner and outer surfaces of a cold drawing pipe, and saponifying the cold drawing pipe for a second time; 8) performing cold drawing on the cold drawing pipe for a second time; and 9) performing dimensional inspection, alignment, defect polishing, surface quality inspection and non-destructive inspection on the cold drawing pipe respectively to form a finished seamless steel pipe, and cropping the top. The seamless steel pipe and the manufacturing method have the characteristics that the seamless steel pipe and the manufacturing method are economical, environment-friendly, low in metal consumption, high in quality and yield of finished products, efficient in processing, easy to operate, and the like, and completely meet the market requirement of seamless steel pipes for long pipe trailers.

The invention discloses a motorcycle engine exhaust valve stem which includes the head of one molding (1) and the rod (2). The circumference face at end of rod has a ring trough (4) and the head ( 1) located at the other end of the rod(2) , these two coinciding with the axis line. In the head (1) there is a groove(3), at the bottome of which has the capacity of home along rod part(2). The capacity of home(5) is filled by contents of sodium metal powder (6), and the Vice-home (5) Department of imports from Plug (7) Seal. This invention can timely release the heat on the head to the rod, then remove the heat from catheter. Thus it effectively prevents the head of the exhaust valve from suddenly warming and accumulating heat, and ensures the metallurgical structure and its intensity have no changes, eliminates disadvantagel caused by colloform sediment breaking upcoarse oil, so ensure the performance and the service life of exhaust valve stem.

A flexible periclase compound spinel brick solves the problems of the structure spalling and the environmental pollution of the generated sexivalence chromium salt which are always existed in the traditional magnesia-chromite brick. The manufacturing process thereof comprises sand making and brick making; firstly, a solid solution, the inner core of the body of which contains Al2O3, Cr2O3 and MgO, is prepared; the outer edge of the body is special synthesized solid solution sand formed by layer belts containing magnesium aluminate spinel; and then ynthesized solid solution sand used as one of brick making ingredient, prefabricated magnesite clinker, and periclase spinel selected according to the requirements are made into the periclase compound spinel brick according to the requirements of the set technological conditions. The brick conditionally retains a defined amount of chromium and has good hanging kliner coating performance, and obviously reduces the capability of generating sexivalence chromium salt owing to changing the mode of existence of Cr2O3 in the brick. When the brick is used, a metamorphic zone belt does not appear, thus fundamentally eliminating the recurring illness of the structure spalling generation in the use course and prolonging the service life.

The invention discloses a microwave digestion instrument composed of a rotary table and a digestion pot disposed on the rotary table. The top of the digestion pot is provided with a warm pressing conjunction box able to rotate freely, and the digestion pot is equipped with sensors that are in connection with the warm pressing conjunction box. The invention substantially shortens the length of a warm pressing controlling cable so as to eliminate the disadvantages brought by an overlong control cable, and avoids motor damage caused by overlarge starting current and starting moment of a rotary table motor due to frequent direction change, thus extending the motor service life. The instrument of the invention improves the uniformity of a sample in microwave energy receiving, enhances the work pressure and temperature of the instrument, and is in favor of improving the digestion quality of the sample. Besides, the instrument eliminates cross contamination of samples in a master control pot.

The invention relates to a preparation method of solvent-based two-component wind turbine blade protective primer. The preparation method comprises the steps of preparing a component A and a component B; and mixing the components A and B at a ratio of (8-10):(1-2), and uniformly stirring to obtain the solvent-based two-component wind turbine blade protective primer. The protective primer prepared by the method provided by the invention has the advantages of excellent adhesion, rapid drying speed and good compatibility, is suitable for thick film coating, and improves work efficiency.

The invention discloses an offshore water depth measurement method and device based on a novel high-order dispersion relationship. Different from the traditional water depth measurement technology, the method comprises the following steps: obtaining a time-space sequence digital image or video image of a surface wave of a target sea area; performing maximum total coherence frequency band processing on the image so as to generate corresponding frequency and a wave number pair on each calculation point, and substituting the frequency and the wave number pair into a high-order dispersion relationship wave model; and outputting a water depth value of a target sea area via iterative computation. By adoption of the offshore water depth measurement method and device disclosed by the invention, the water depth measurement cost is greatly reduced, the drawbacks and risks of the traditional marine hydrological measurement are eliminated, the requirements for continuous real-time updating of water depth information can be met, and the working efficiency is greatly improved.

The invention provides a cement clinker manufacturing device and a manufacturing method, which facilitates generation of alite after extracting and sintering a part of cement raw materials having halogen elements and / or fuel and prevent a heat loss from being generated during the high-temperature sintering process and thus reduce the sintering heat of the cement clinkers. The cement clinker manufacturing device comprises a preheater for preheating by mean of cement raw materials having halogen elements and / or fuel, and a rotary kiln for sintering the cement raw materials on the downstream side of the preheater. The cement clinker manufacturing device further comprises an extraction pipeline (6) for extracting a part of the cement raw materials from a sliding chute (5) of a cyclone separator (4) of the preheater (3), a sintering device (7) for sintering the cement raw materials extracted from the extraction pipeline (6), and a returning pipeline (9) located in the rotary kiln (1) and used for a part of the cement raw materials sintered in the sintering device (7) to return.

The invention discloses a steam turbine rotor, which comprises a main shaft and impellers in all stages, wherein the main shaft and the impellers in all stages are in a sheathing structure, the outer surface of the main shaft is provided with external assembly surfaces for assembling the impellers in all stages and is in a step shape, the impellers in all stages are assembled on the corresponding external assembly surfaces of the main shaft through respective annular inner assembly surfaces , the each-stage external assembly surfaces arranged on the main shaft respectively have certain conicity, the inner assembly surfaces of the impellers in all stages have the matched and consistent conicity with the conicity of the corresponding eternal assembly surface on the main shaft, the impellers in all stages and the main shaft form the conical surface assembly, and the self locking is realized. The steam turbine rotor has the advantages that the main shaft and the impellers form the assembly through the conical surface, the reverse pull type self locking of the impeller is realized on the main shaft, the assembly is firm and reliable, the loose sliding of the impellers on the main shaft is effectively avoided, a positioning key is not needed for the positioning locking, all defects cased by the positioning key are eliminated, the production cost is effectively controlled, the safety of the rotor is high, and the service life is long.

The invention discloses a universal electromagnetic solenoid basic assembly and combined structures based on the universal electromagnetic solenoid basic assembly, the universal electromagnetic solenoid basic assembly comprises a core tube, an enameled wire winding and a wave generator, the enameled wire winding is wound on the outer surface of the core tube, and the wave generator is electricallyconnected with the enameled wire winding; the wave generator emits pulse electromagnetic wave frequency of a specific frequency band, and a specific electromagnetic field is generated through the enameled wire winding, so that descaling and scale inhibition effects on water flow passing through the core tube are achieved. The invention further discloses two combined structures of the universal electromagnetic solenoid basic assembly, and the combined structures are characterized in that the electromagnetic solenoid basic assembly is installed on a fixing support and the electromagnetic solenoid basic assembly is installed in a pipe, and the situation that an existing system can only be wound on the outer wall of the pipe is changed. And a series of defects caused by improper installationmode of the fluid treatment system are eliminated.

The invention belongs to the traditional Chinese medicine preparation and particularly relates to a traditional Chinese medicine paste for curing diseases of bones and joints and a preparation methodthereof. The traditional Chinese medicine paste comprises the following traditional Chinese medicines: rhizoma homalomenae, anisetree bark, asarum, common monkshood mother root, radix aconiti agrestis, garden balsam stem, pyrola, rhizoma dioscoreae nipponicae, nidus vespae, teasel root, glaucousback threewingnut root-bark, natural copper calcined by spora lygodii, musk, dragon's blood, deerhorn glue and miniumite. The preparation method comprises the following steps: soaking the medicines in sesame oil, frying with lowfire while controlling the oil temperature to mix and melt the medicines, spreading the medicines on cotton cloth and doubling and sealing. The traditional Chinese medicine paste of the invention has the functions of eliminating wind to dispersing cold, dehumidifying and removing pain or numbness, improving blood circulation and suppressing pain, diminishing inflammation and removing toxin, promoting the healing of broken bones and sinews, and tonifying the liver and thekidney. The traditional Chinese medicine paste has cured 1383 patients with diseases of bones and joints.

The invention discloses a heat accumulating type electric heater with a heat accumulator formed by casting. The electric heater comprises a outer shell body, wherein a grating cover is arranged abovethe outer shell body, a skirt base is arranged below the outer shell body, at least one fan is arranged at the bottom of the skirt base; the heat accumulator is arranged in the outer shell body, the heat accumulator is a cast-formed solid heat accumulating material, a plurality of air flow channels are uniformly arranged in the heat accumulator at intervals, the lower ends of the air flow channelscommunicate with the interior of the skirt base, the upper ends of the airflow channels communicate with the interior of the grating cover, and an electric heater is arranged between every two adjacent airflow channels. According to the heat accumulating type electric heater, the heat accumulator, the electric heater and the heat preservation layer are in a totally-closed structure and are isolated from outside air, so that metal oxidation can be prevented, the service life of related components is prolonged, the closed structure becomes a thermodynamic closed system, the heat exchange is carried out with the outside, no matter and mass exchange exists, zero emission of the system is achieved, the environment-friendly effect is achieved, the water and the water vapor or the particles cannot be immersed, and a relatively high safety protection grade is achieved.

The invention discloses a method for determining reaction acid concentration consistency in titanium dioxide acidolysis, which comprises the following steps: in the acidolysis process, firstly determining original acid concentration and reaction acid concentration, then counting the weight of added mineral powder, acid-mineral ratio, sulfuric acid volume, sulfuric acid density, waste acid specific gravity and waste acid concentration, calculating the waste acid amount according to the following formula: (mineral powder weight * acid-mineral ratio-sulfuric acid volume * sulfuric acid density * reaction acid concentration) / waste acid specific gravity * (reaction acid concentration-waste acid concentration) = the waste acid amount, and adjusting the waste acid amount according to the set reaction acid concentration. The method has the beneficial effects that due to the accurate control of the acid concentration of the acidolysis reaction, the problem that a large number of solid-phase substances remain in a titanium dioxide production acidolysis pot is solved. No solid-phase substance is left in the acidolysis pot, and a clear gas distribution plate can be seen in the acidolysis pot. A guarantee is provided for increasing the yield. A solid foundation is laid for improving the quality, and the decomposition and acidolysis rate of titanium ores is increased and stabilized to 95.5% or above from the original less than 92.5%.

The invention provides an indoor and outdoor ventilating and air exchanging method and device of an air treatment device. The method and the device are used for introducing air from outside and / or exhausting air to the outside through an indoor air treatment device. The device is mounted at a window of a house and comprises a box-shaped air channel which is fixed to sidewall of a window frame, wherein an outer air port which is connected to the outside is formed in the sidewall, facing the outside of the window, of the box-shaped air channel; an inner air port which communicates with the air treatment device is formed in the sidewall, facing the inside, of the box-shaped air channel; a separating plate is arranged in the air channel and separates the air channel into a fresh air channel and an air exhaust channel; an inward-opening type wind window manufactured through a transparent material is connected to the side edge of the box-shaped air channel through hinges. The device is simple in structure, and easy to mount and dismount, and basically does not influence the normal ventilation and lighting; various shortages caused by hole drillings in the wall can be removed; the device is applicable to various indoor air treatment devices requiring introducing fresh air from outside or synchronously introducing air from the outside and exhausting air to the outside, such as an air conditioner, an one-way fresh air ventilator or a two-directional heat exchanging and air exchanging machine; the main obstacle, namely, difficult mounting, of the various indoor air treatment devices in popularization and application can be avoided.

The invention provides a mini universal wall-mounted combined type internet-of-things intelligent control electric boiler; direct heating is adopted for the intelligent control electric boiler, the energy used is clean, and an aerogel material arranged on the intelligent control electric boiler is used as a heat insulation layer, so that the heat loss of the boiler is minimized, the appearance volume of the boiler is reduced, and construction is facilitated; a non-stick coating is arranged on the inner surface of the boiler body, so that the interior of the boiler is kept clean, and continuousand efficient heat transfer can be kept; mounting holes of the intelligent control electric boiler are cross holes, the direction of an electric control panel can be adjusted according to horizontal,vertical and inclined suspension modes, the wall-mounted angle can be substantially adjusted according to the requirements of mounting site conditions, and the intelligent electric boiler controllercan automatically and intelligently allocate the start and stop of each heating body, so that the electric boiler is enabled to always work in a constant temperature state, and a heating system and the output power can be adjusted in real time according to the temperature change of different occasions in heating seasons; and the intelligent control electric boiler has the advantages of reasonablestructure, ingenious design, strong adaptability and safe and reliable operation and is suitable for social popularization and use.

The invention provides a cement clinker manufacturing device and a manufacturing method, which facilitates generation of alite after extracting and sintering a part of cement raw materials having halogen elements and / or fuel and prevent a heat loss from being generated during the high-temperature sintering process and thus reduce the sintering heat of the cement clinkers. The cement clinker manufacturing device comprises a preheater for preheating by mean of cement raw materials having halogen elements and / or fuel, and a rotary kiln for sintering the cement raw materials on the downstream side of the preheater. The cement clinker manufacturing device further comprises an extraction pipeline (6) for extracting a part of the cement raw materials from a sliding chute (5) of a cyclone separator (4) of the preheater (3), a sintering device (7) for sintering the cement raw materials extracted from the extraction pipeline (6), and a returning pipeline (9) located in the rotary kiln (1) and used for a part of the cement raw materials sintered in the sintering device (7) to return.

The invention relates to a silent electricity-saving type alternating current contactor which comprises a resistor R2, a resistor R3, a resistance strain gage R7, a resistor R4 and a capacitor C1 which are sequentially connected between a positive electrode and a negative electrode of a rectifying circuit in series; an anode of D2 is connected with the connected point of the R2 and the R3; a cathode of the D2 is connected with the negative electrode of the rectifying circuit; an anode of a silicon controlled rectifier (SCR) is connected with the positive electrode of the rectifying circuit; the cathode of the SCR is connected with one end of an absorption coil L1 in the alternating current contactor; the other end of the L1 is connected with the negative electrode of the rectifying circuit; the connected point of the R3 and the R7 is connected with a first base electrode of a double base diode BT through R5; a second base electrode of the BT is connected with a control electrode of the SCR; and a transmitting electrode of the BT is connected with connecting points of the R4 and the C1. According to the silent electricity-saving type alternating current contactor disclosed by the invention, the power supply of the L1 is controlled by using resistance mutation of the R7, so that the L1 has heavy current at the beginning of electrifying and the actuation of an armature of the contactor is ensured. Meanwhile, the resistance of the R7 is quickly increased and the current of the L1 is reduced and stabilized in a holding state.

A dustbin house comprises a dustbin house body, a low-temperature plasma device and a dustbin. The low-temperature plasma device is arranged at an inner roof of the dustbin house body. The dustbin isstored in the dustbin house body. Deodorizing, disinfection and sterilization are conducted with the low-temperature plasma device. In addition, odors of rubbish in the dustbin are degraded through deodorizing, disinfection and sterilization of the dustbin, no odors come out in the process that the rubbish is conveyed to a rubbish station, pretreatment is conducted for subsequent treatment of rubbish odors, and thus the purpose that environmental health is improved is achieved.

The invention discloses a control algorithm for a random moving target tracking trolley based on nonlinear PID. The algorithm comprises an algorithm for controlling the running speed U (t) of the trolley, and the algorithm of the U (t) is a nonlinear combination of three links: a proportional link P, an integral link I and a differential link D. According to the algorithm, an appropriate elementary function can be selected according to motion characteristics and system characteristics of a random moving target tracking trolley to construct a nonlinear PID coefficient, that is, defects are overcome through nonlinear combination of the proportional link P, the integral link I and the differential link D of PID control.

The invention discloses equipment for detecting damage of sieving pieces. The equipment comprises a body, wherein a material inlet is formed on the body; the body is internally provided with a sieve capable of vibrating; powder materials entering from the material inlet enter the sieve which is arranged in an inclined manner; a discharging port is formed at the low end of the sieve; a foreign-matter hopper for receiving foreign matters is arranged at the lower side of the discharging port, and is provided with a weighing device; when the weighing device detects that the weight is more than the set value, the sieving piece is damaged; a ball body is placed on a sieving mesh of the sieve; the sieve is provided with a blocking plate for blocking the ball body; a gap left between the blocking plate and the sieving mesh is used for passing of the power materials; the blocking plate is used for preventing the ball body from sliding out of the discharging port or blocking the discharging port; and a material outlet is formed on the body positioned at the lower side of the sieve. The equipment disclosed by the invention has the advantages that whether the sieving piece of a crusher is damaged can be automatically detected, large-particle materials are prevented from entering next procedure, the defect caused by artificial judgment is eliminated and the requirement for automatic control of a feed production factory also can be met simultaneously.

The invention belongs to the traditional Chinese medicine preparation and particularly relates to a traditional Chinese medicine paste for curing diseases of bones and joints and a preparation method thereof. The traditional Chinese medicine paste comprises the following traditional Chinese medicines: rhizoma homalomenae, anisetree bark, asarum, common monkshood mother root, radix aconiti agrestis, garden balsam stem, pyrola, rhizoma dioscoreae nipponicae, nidus vespae, teasel root, glaucousback threewingnut root-bark, natural copper calcined by spora lygodii, musk, dragon's blood, deerhorn glue and miniumite. The preparation method comprises the following steps: soaking the medicines in sesame oil, frying with lowfire while controlling the oil temperature to mix and melt the medicines, spreading the medicines on cotton cloth and doubling and sealing. The traditional Chinese medicine paste of the invention has the functions of eliminating wind to dispersing cold, dehumidifying and removing pain or numbness, improving blood circulation and suppressing pain, diminishing inflammation and removing toxin, promoting the healing of broken bones and sinews, and tonifying the liver and thekidney. The traditional Chinese medicine paste has cured 1383 patients with diseases of bones and joints.

The invention relates to a working method of a silent power-saving type alternating current contactor. The working method comprises the following steps of: when a bridge-type rectification circuit is electrified, starting a relaxation oscillator and vibrating in higher frequency; a pulse signal output by a second base electrode of a double base diode in the relaxation oscillator is output from a sixth resistor and loaded to a control electrode of a thyristor, and a conduction angle of the thyristor is ensured to be at a maximum state, the direct current of a loop of a sucking coil is ensured to be a maximum value, and an armature and an iron core of the alternating current contactor are attracted instantly; when the armature and the iron core are sucked, a resistance of a resistance strain gage is increased instantly, thereby increasing charging and discharging time constants of an RC (Resistor Capacitor) circuit in the relaxation oscillator, decreasing the charging current of a capacitor, promoting the relaxation oscillator to reduce the vibration frequency, ensuring the conduction angle of the thyristor to be at a minimum state and the direct current obtained from the sucking coil to be a minimum value, and stabilizing the alternating current contactor at a sucking state due to the direct current of the minimum value.

The invention relates to a silent electricity-saving type alternating current contactor which comprises a resistor R2, a resistor R3, a resistance strain gage R7, a resistor R4 and a capacitor C1 which are sequentially connected between a positive electrode and a negative electrode of a rectifying circuit in series; an anode of D2 is connected with the connected point of the R2 and the R3; a cathode of the D2 is connected with the negative electrode of the rectifying circuit; an anode of a silicon controlled rectifier (SCR) is connected with the positive electrode of the rectifying circuit; the cathode of the SCR is connected with one end of an absorption coil L1 in the alternating current contactor; the other end of the L1 is connected with the negative electrode of the rectifying circuit; the connected point of the R3 and the R7 is connected with a first base electrode of a double base diode BT through R5; a second base electrode of the BT is connected with a control electrode of the SCR; and a transmitting electrode of the BT is connected with connecting points of the R4 and the C1. According to the silent electricity-saving type alternating current contactor disclosed by the invention, the power supply of the L1 is controlled by using resistance mutation of the R7, so that the L1 has heavy current at the beginning of electrifying and the actuation of an armature of the contactor is ensured. Meanwhile, the resistance of the R7 is quickly increased and the current of the L1 is reduced and stabilized in a holding state.

The invention discloses a method for making a bear autogenous tissue drainage catheter and artificial longitudinal type ruga bile taking. The method comprising the following: a step of abdomen opening, which is to make a longitudinal type ruga closed pouch at the bottom of a gallbladder; a drainage catheter is made by means of a jejunum or a gallbladder tissue; the catheter is matched with or connected with the gallbladder and then is straightened up; and an extracutaneous drainage opening is made. The longitudinal type ruga is made through adopting a suture method or a knotting method with the ruga number reaching to three to six, and rugae are even and tightly closed after ruga making, thereby solving the problem of bile leakage after an operation; moreover, the method is convenient for inserting a pipe to take bile, and the bile taking time is only 1 to 1.5 minutes; bile taking can be carried out twice every day without the occurrence of stricture or atresia of the drainage opening and the drainage catheter, thereby ensuring stronger anti-infection immunizing power and repairing capacity.

The invention discloses a protection finish paint for a wind power blade, which comprises a component A and a component B according to a mass ratio of 7-10:1-4, wherein the component A comprises 30-60 percent by mass of modified hydroxylated acrylic resin used as the varnish base, 0.1-0.5 percent by mass of defoaming agent, 0.1-0.5 percent by mass of foam-removing agent, 0.1-0.5 percent by mass of adhesive force promoting agent, 0.5-2 percent by mass of anti-ageing agent, 1-3 percent by mass of abrasion-resistant assistant, 3-8 percent by mass of delustering agent, 0.5-2 percent by mass of wetting dispersal agent, 0.5-2 percent by mass of thixotropic agent, 5-35 percent by mass of organic solvent I and 18-35 percent by mass of titanium white; and the component B comprises 70-95 percent by mass of curing agent and 5-30 percent by mass of organic solvent II. The invention also discloses a preparation method of the protection finish paint for the wind power blade.

This invention relates to a uniform capacity pulsed floating harmless wide voltage adjusting storage battery complete set DC screen in which a floating device for outputting pure DC and pulsed DC voltages is designed, the pure DC is provided to a DC main lead directly via a reaction diode, the pulsed DC is charged to the battery with pulsed floating, a dual-purpose device is designed for charging and floating to output pulsed DC to connect with the charge / discharge main lead and output the pure DC to connect with the DC main lead via the reaction diode for standby. Two sets of three-section two taps batteries are designed, the floating voltage of the main section is the same with that of the DC main lead and connected with the DC main lead in floating operation, two adjusting section batteries, operate when AC is off to realize harmless voltage adjustment via an anti-ring flow channel and harmless wide adjustment circuit.

The invention provides a novel boiler bottom upper water seal mechanical sealing structure which comprises a water cooling wall, a slag check curtain is arranged on the lower portion of the water cooling wall, a mechanical sealing mechanism is arranged on one side of the slag check curtain, a water seal tank transformation base is arranged on the bottom face of the mechanical sealing mechanism, and a buffer layer is arranged on one side of the water seal tank transformation base. According to the boiler bottom upper water seal mechanical sealing device, a novel boiler bottom upper water seal mechanical sealing technology is adopted, an originally-designed sealing water system is omitted, and a large number of fresh water resources are saved; meanwhile, the problems of boiler bottom sealing, boiler efficiency reduction and equipment pollution caused by ash water leakage due to deformation of inner and outer protection plates are solved; and the stubborn problem that the longitudinal expansion of the water cooling wall of the boiler body is limited is thoroughly solved.

This invention relates to a uniform capacity pulsed floating harmless wide voltage adjusting storage battery complete set DC screen in which a floating device for outputting pure DC and pulsed DC voltages is designed, the pure DC is provided to a DC main lead directly via a reaction diode, the pulsed DC is charged to the battery with pulsed floating, a dual-purpose device is designed for charging and floating to output pulsed DC to connect with the charge / discharge main lead and output the pure DC to connect with the DC main lead via the reaction diode for standby. Two sets of three-section two taps batteries are designed, the floating voltage of the main section is the same with that of the DC main lead and connected with the DC main lead in floating operation, two adjusting section batteries, operate when AC is off to realize harmless voltage adjustment via an anti-ring flow channel and harmless wide adjustment circuit.

The invention discloses a steam turbine rotor, which includes a main shaft and impellers of various levels. The main shaft and impellers of all levels are in a set structure. The outer surface of the main shaft is provided with an outer assembly surface for assembling the impellers of various levels. The impellers of each level are assembled on the corresponding outer assembly surface of the main shaft through their own annular inner assembly surfaces; the outer assembly surfaces of each level on the main shaft have a certain taper; the inner assembly surfaces of the impellers of each level have corresponding The outer assembly surface of the impeller and the main shaft at all levels are matched with each other, and the taper is consistent. The main shaft and the impeller of the present invention are assembled with a conical surface, and the impeller realizes an inverted self-locking on the main shaft, and the assembly is firm and reliable, which effectively prevents the impeller from loosening and sliding from the main shaft, and does not require positioning keys for positioning and locking. All the disadvantages caused by the positioning key, the production cost can be effectively controlled, the safety of the rotor is high, and the service life is long.