79results about How to "Balance axial force" patented technology

The invention belongs to the field of centrifugal pumps and particularly relates to a multi-stage submersible pump system. The system comprises a pump pond and a pump body. A pump casing comprises a suction section, a middle section, a lower end cover, a motor casing and an upper end cover. The upper end cover is integrally cast formed, the upper and lower end covers are communicated through at least four liquid outlet tubes, sections of flow channels in the upper end cover and the liquid outlet tubes are circular, and the flow channel and liquid outlet tube connection positions are in smooth transition. A horn tube is arranged on the lower portion of the suction section, and two to six of first guide sheets are distributed along the inner circumference of the horn tube uniformly. A suction filter screen is arranged at the suction end of the horn tube, exhaust holes are formed in the upper and lower portions of the motor casing respectively, and a triangular labyrinth groove is formed in the first-stage impeller, final-stage impeller and shaft sleeve clearance fit positions respectively. According to the system, the pump body suction efficiency is high, the pump pond thermal-insulation effect is good, the flexibility and the economy of the whole system are improved due to the final-stage guide blade unique structure, and by the aid of the axial force balance and bearing lubrication structure, the axial force can be balanced, and the pressure and the flow of bearing lubrication liquids are guaranteed.

The invention discloses a double-inlet horizontal split centrifugal pump. The double-inlet horizontal split centrifugal pump comprises a pump body and a pump cover; and the pump body and the pump cover are sealed through a filler gland. The double-inlet horizontal split centrifugal pump is characterized in that water sucking ports are respectively formed in two ends of the same side of the pump body; a water outlet is formed in the other side of the pump body, and is positioned in the axial center; primary double-suction impellers and a secondary impeller are arranged in the pump; the water sucking ports are connected with the primary double-suction impellers; the primary double-suction impellers are connected with the secondary impeller; the primary impellers and the secondary impeller are fixed through a sealing ring; and the two primary double-suction impellers are arranged back to back. The centrifugal pump is equivalent to two double-suction pumps connected in parallel for synchronously working; under the same outer diameters of the double-suction pump impellers, the flow lift can be increased by one time; the inlet and the outlet are in the same direction, and are perpendicular to the pump shaft, so that the arrangement and the installation of the pump and the water inlet and outlet pipes are facilitated; and the impellers are symmetrically structured without axial force, and are stably operated.

The invention relates to a sewage pump with an automatic axial thrust balancing function. The sewage pump comprises a pump body and an impeller which is provided with a hub. A water groove is formed in the hub. A connecting hole and a water outlet are formed in the pump body. The water groove is connected with the connecting hole and the water outlet in sequence. High-pressure water in the impeller is discharged from the pump body through the water groove in the hub, the connecting hole and the water outlet in sequence, and axial thrust is balanced. Compared with the prior art, the sewage pump has the advantages that axial thrust is automatically balanced, the structure is simple, and service life is long.

The invention discloses a bearing for a main feed water pump. The bearing comprises an oil retaining disc, a thrust disc, an axial displacement measuring disc and a bearing block; the oil retaining disc is sleeved on a pump shaft, and the bearing block is sleeved on the radial outer side of the oil retaining disc, the radial outer side of the thrust disc and the radial outer side of the axial displacement measuring disc; a front thrust pad seat and a rear thrust pad seat are fixed onto the inner circumference of the bearing block and are symmetrically arranged on the front side and the rear side of the thrust disc; a plurality of front thrust pads which are uniformly distributed around the pump shaft are arranged between the front thrust pad seat and the front end surface of the thrust disc; and a plurality of rear thrust pads which are uniformly distributed around the pump shaft are arranged between the rear thrust pad seat and the rear end surface of the thrust disc. The bearing has the technical advantages that axial force on the pump shaft is balanced under a synergetic effect of the front thrust pads, the thrust disc and the rear thrust pads when the main feed water pump runs, the pump shaft is prevented from being damaged during running, and the safety running of the main feed water pump is guaranteed.

The invention provides a leakage-free hydraulic buffering vacuum breaker valve. According to the vacuum breaker valve, a hydraulic cylinder and the valve plate are arranged, wherein the hydraulic cylinder is installed on the valve plate and acts together with the valve plate, a sliding seal between the bottom of the hydraulic cylinder and a valve rod is located inside a hydraulic buffering cavity,so that complete sealing in the hydraulic cylinder is guaranteed, hydraulic buffer oil is in a completely sealed state, sealing abrasion leakage is avoided, and the service life of the vacuum breakervalve is prolonged; moreover, a throttling valve is arranged, the buffering effect of the valve plate in the closing position is improved, noise generated through collision of the valve plate and a valve seat is reduced, a supporting sleeve plays a role in supporting the hydraulic cylinder, and further balances radial force of opening and closing of the valve plate so as to prolong the fatigue life of the vacuum breaker valve, meanwhile, a spring is arranged, so that axial force is balanced; and in addition, the vacuum breaker valve is simple in structure, reasonable in design, safe and reliable, and potential safety hazards during operation of a water turbine are effectively reduced.

The invention discloses a wide head rotor of a high vacuum displacement pump. In an existing cam pump technology, seal between a pump body and a rotor is linear pump, and therefore, vacuum capacity is easily caused to drop after the rotor and the pump body are worn. The end surface of the wide head rotor of the high vacuum displacement pump is of an axisymmetric structure, and a 1/4 molded line of the end surface consists of three parts: a top end wide head circular arc AB, a transition curve BD and an intermediate circular arc DE, and the rotor is formed by wrapping a metal framework and rubber; and the top end wide head circular arc AB and the intermediate circular arc DE of the wide head rotor are two conjugate curves. The wide head rotor effectively increases a working pressure range of the high vacuum displacement pump, ensures lasting stability of conveying pressure, reduces pulsation and improves working efficiency.

The invention discloses an axial force self-balance type four-screw mechanical device with gas thrust bearings. The mechanical device adopts four screws which are symmetrically arranged and have opposite thread turning directions, the screws in the same housing are engaged with each other by pairs, and the thread turning directions of the screws on the same shaft but different housings are opposite, so that in the normal running process of the mechanical device, axial force on two rotors is basically countered, and the self-balance of the axial force is realized; and two symmetrical thrust bearings are arranged on each shaft, so that remaining axial force on each shaft can be bore by the two symmetrical thrust bearings, small absolute value axial force which cannot be fully self-balanced can be bore, the bi-directional thrust of an exhaust-end bearing of the four-screw mechanical device is realized, and friction losses can be effectively reduced. The gas thrust bearings and the four-screw mechanical device are combined together, the axial force is effectively balanced, the working efficiency is increased, and at the same time, the working stability of a compressor or an expander isimproved.

The invention discloses a radial flow type rotating mechanical impeller. The radial flow type rotating mechanical impeller comprises an impeller body, and a plurality of main blades and a plurality ofedge blades are arranged on the back surface of the impeller body. The main blades are uniformly distributed on the back surface of the impeller body in the peripheral direction of the impeller body,and the main blades are arranged in a protruding mode. The edge blades are uniformly arranged between the inlet sections of the adjacent main blades in the peripheral direction, and the edge blades are arranged in a protruding mode. According to the radial flow type rotating mechanical impeller, the blade consistency in an area with a larger radius on the back portion of the impeller body is significantly increased, meanwhile, the increase of the blade consistency of an area with a smaller radius is avoided, so that the circumferential velocity increases rapidly after leakage fluid enters a back clearance of the impeller body, the circumferential velocity of the leakage fluid further increases with the decrease of the radius under the drive of the blades on the back portion of the impeller body, the pressure is reduced at the same time, the reduction of fluid pressure in the area with the larger radius facilitates the reduction of the axial force on the back portion of the impeller body, and the axial force of the impeller body is balanced.

The invention provides an antibiotic wastewater deep degradation device based on hydrodynamic cavitation. The device comprises a stator and rotors, the stator is a hollow sealed cylinder, and rotatingshafts are installed at the two ends of the interior of the stator; a plurality of rotors are mounted on each rotating shaft and are of wheel disc structures; the two rotating shafts rotate oppositely in opposite directions; blind holes are distributed in the end surface of the rotors and the inner wall of the stator; cavitation grooves are formed in the circumferential direction of the rotors; amicro gap formed by the blind holes, the cavitation grooves, the rotor wall surface and the stator wall surface forms a current limiting structure so that a current limiting effect is achieved, and the cavitation phenomenon is enhanced; one end of the stator is provided with a feeding pipe, and the other end is provided with a discharging pipe. The two rotors rotate at a relatively high speed sothat cavitation holes in the rotors move relative to the antibiotic wastewater, and the cavitation phenomenon is caused. The method adopts hydrodynamic cavitation to degrade organic matters in the antibiotic wastewater, has the advantages of high efficiency, good magnification, large treatment capacity, continuous operation, low cost and no secondary pollution, and has wide application prospects in the field of wastewater degradation.

The invention relates to a high-efficiency constant-pressure tangent fire pump. The high-efficiency constant-pressure tangent fire pump comprises a pump body, a pump cover, an impeller, a water suction chamber, a pumping chamber and a diffusion pipe. The high-efficiency constant-pressure tangent fire pump is characterized in that the pumping chamber of the pump body is of a spiral pumping structure, and the spiral pumping chamber is provided with a separation tongue; the impeller is a rear-cover-plate semi-open type impeller with an impeller seal ring; the pump cover is provided with a seal ring. The high-efficiency constant-pressure tangent fire pump has the advantages that efficiency is obviously higher than that of a common constant-pressure fire pump, and the development requirement for high efficiency and energy saving is met; axial force is balanced effectively; mechanical seal bearing pressure is reduced; when the high-efficiency constant-pressure tangent fire pump is made into a vertical structure, a pump inlet and a pump outlet can be deigned to be on the same straight line, and therefore a pump set can be installed on a pipeline like valves.

The invention discloses a novel horizontal cantilever energy-saving two-stage pump. The novel horizontal cantilever energy-saving two-stage pump comprises a water inlet, a heat preservation jacket, awater inlet flange, a pump body, a rotor, a support leg and a first impeller. The two-stage pump adopts a horizontal cantilever structure; the water inlet flange is arranged at one end of the two-stage pump; the heat preservation jacket is arranged on the flange face of the water inlet flange; the water inlet is formed in the water inlet flange; the water inlet flange is connected with the pump body; the water inlet flange and the pump body are connected through a bolt; a sealing ring is arranged at the joint of the water inlet flange and the pump body; a water outlet is arranged at the upperend of the pump body; a water flow channel and an annular water pressing chamber are arranged in the pump body; a bearing support is arranged on the right side of the pump body; the pump body is connected with the bearing support through a bolt; a bearing gland is connected to the right side of the bearing support; a double-row centripetal ball bearing is arranged in the bearing gland; the rotor is arranged in the pump body; and the support leg is connected below the bearing gland. The two-stage pump runs stably and has good structural stability.

The invention discloses a detachable double-channel closed impeller. The detachable double-channel closed impeller is used for a double-channel closed centrifugal pump. The detachable double-channel closed impeller comprises a circular cover plate assembly 1 and an impeller body assembly 2 which are used for forming a double-channel cavity body of the impeller, wherein the impeller body assembly 2 comprises a cover plate part and a liquid inlet sleeve in front of the cover plate part; the circular cover plate assembly 1 is detachably embedded into the cover plate part of the impeller body assembly 2 to form a seamless double-channel cavity body of the closed impeller; a spiral channel in an axial direction and a spiral channel in a centrifugal direction are formed in the double-channel cavity body of the closed impeller; and the spiral channel in the axial direction is connected with the spiral channel in the centrifugal direction to form a spiral vertical channel. According to the detachable double-channel closed impeller disclosed by the invention, the purpose of rapid dredge for the double-channel closed impeller after being blocked can be achieved on the premise of guaranteeing the efficient running of the impeller, so that the blockage treatment time of the impeller is shortened to several minutes from several hours and even more than ten hours.

The invention discloses a horizontal barrel pump which comprises a barrel body cover, a barrel body, a pump core, an outlet flange, an inlet flange, a bearing component I, a shaft, a balance tube and a bearing component II, wherein the pump core is sleeved on the shaft, and the barrel body is arranged outside the pump core; one end of the barrel body is provided with the barrel body cover, and the outlet flange and the inlet flange are arranged on the barrel body; one side of the shaft is provided with the bearing component I, while the other side of the shaft is provided with the bearing component II; and one end of the balance tube is connected with the barrel body cover, while the other end of the balance tube is connected with the barrel body. The horizontal barrel pump disclosed by the invention is applicable to a design structure of a high-temperature pump with high rotating speed and high reliability; and each impeller acts on a medium, so that the pressure of the medium rises level by level, and the highest pressure is achieved on the last level, therefore, the reliability and the service life of the shaft are improved and prolonged, most axial force can be balanced out, and the horizontal barrel pump is good in tightness.

The invention discloses a cavitation device for strengthening refining production of cellulose pulp. The cavitation device comprises a stator, a rotating shaft, rotors and ultrasonic transducers, wherein the rotating shaft comprises a first rotating shaft body and a second rotating shaft body, the rotors are composed of a first set of rotors and a second set of rotors, the stator is a closed cylinder, a feeding port and a discharging port are formed in the two opposite sides of the stator respectively, the ultrasonic transducers are distributed on the inner wall of the stator, the first rotating shaft body and the second rotating shaft body are installed on the two opposite side faces of the stator respectively, the first set of rotors and the second set of rotors are arranged in the stator and installed on the first rotating shaft body and the second rotating shaft body respectively, each of the first set of rotors and the second set of rotors at least comprises two separated wheel discs; rotor cavitation holes are distributed in the outer peripheral surface of each wheel disc; and stator cavitation holes are distributed in the inner wall of the stator. According to the invention, the cavitation technology is applied to paper pulp refining, the advantages of being simple, high in efficiency, good in utilization rate and the like are achieved, physical stirring effect is achieved, and the refining process of paper pulp is accelerated through a cavitation reaction.

The invention relates to the technical field of multistage pumps, in particular to an axial force balancing device of the multistage pump. The axial force balancing device of the multistage pump is provided with a pump body, a pump shaft, and impellers and is characterized in that a balance disc seat and a balance disc are sleeved on the pump shaft, the inner wall of the balance disc is fixedly connected with the pump shaft, the outer wall of the balance disc is connected with the balance disc seat in a movable mode, and one end of the balance disc is connected with impellers. Besides, the balance disc seat is fixedly connected with the back section of the pump body so as to enable a fluid gap to be formed between the balance disc and the balance disc seat. When fluid passes the fluid gap between the balance disc seat and the balance disc, due to the relative motion between the balance disc and the balance disc seat, a water ring is formed in the fluid gap so as to reach the effect of dynamic seal and cause fluid pressure drop, the pressure which is formed on an lower cavity of the balance disc is larger than pressure of an upper cavity, most axial force generated by impellers is balanced, and therefore the axial force balancing device of the multistage pump has the advantages that service life of the pump is prolonged, structure is reasonable, running is stable, the axial force is balanced, service life of a bearing is long, work time of the pump is prolonged and the like.

The invention discloses a low-noise TimeLine economical water-purifying pump, which comprises the following parts: pump chassis, motor rack and cylinder between chassis and rack, wherein the motor and water-cooling device constitutes water-cooling motor, which is sealed by machine on the pump shaft, several adjacent blade components on the pump shaft and rotary component under the pump shaft; a layer of TimeLine is coated on the inner face of cylinder; the water-cooling motor connects the motor rack; two ends of clutch connect the motor shaft and pump shaft separately; the rod-crossing component integrates the motor with pump chassis.

The invention discloses an antibiotic wastewater degradation method and device based on the combined action of electrolysis and cavitation. The method comprises the following steps: (1) wastewater homogenization treatment; (2) carrying out iron-carbon micro-electrolysis reaction, and carrying out catalytic pretreatment on the antibiotic wastewater; (3) carrying out hydraulic and ultrasonic cavitation degradation to degrade antibiotics; (4) cooling and precipitating; (5) post-treatment; the device comprises an iron-carbon micro-electrolysis reactor and a hydraulic and ultrasonic cavitator, wherein a water outlet of the iron-carbon micro-electrolysis reactor is connected with a wastewater inlet of the hydraulic and ultrasonic cavitator. According to the method, the antibiotic wastewater is degraded by utilizing a method of combining iron-carbon micro-electrolysis pretreatment and hydraulic power and ultrasonic cavitation; compared with a single method, a better degradation effect and higher degradation efficiency can be obtained, secondary pollution caused by adding chemicals is avoided, the whole degradation process of the antibiotic wastewater is simplified, the structure is simple, maintenance is convenient, the energy utilization rate is greatly increased, and industrialization is easy to achieve.