31results about How to "Eliminate unbalanced forces" patented technology

The present invention relates to a highly reliable reciprocating compressor that operates efficiently using less energy and generates less vibration. The reciprocating compressor includes a crankshaft, a cylinder, a piston, a connecting rod and a balance weight. The cylinder is offset so that its axis does not intersect the axis of the main shaft portion. The center of gravity of the balance weight is disposed substantially opposite to the center of the eccentric portion with respect to the axis of the main shaft portion, and deviated in the rotational direction from a position just opposite to the center of the eccentric portion. The above structure allows reducing the side pressure of the piston, thereby improving the reliability and efficiency of the reciprocating compressor, and allowing the movement of the balance weight to eliminate unbalanced forces generated by the movement of the piston, the connecting rod, and the eccentric portion.

A permanent magnet type three-phase stepping motor that is simple in construction, with reduced vibration, a reduced unbalanced force in the radial direction, and high torque that can be manufactured at a low cost. The permanent magnet type three-phase stepping motor has a stator and a rotor arranged concentrically with the stator and with an air gap therebetween, said stator having three stator poles, and stator windings of three-phase each wound around each stator pole, each of said stator poles having m pieces of stator pole tooth, said rotor having two split rotor elements, a permanent magnet held between the rotor elements and magnetized so as to form N and S poles in the axial direction thereof, and a plurality (Nr) of small rotor teeth formed at a regular pitch on the outer peripheral surface of each of said rotor elements, said two split rotor elements being circumferentially shifted from each other by a ½ pitch of the small rotor teeth, wherein a pitch of the stator pole teeth is smaller than the pitch of the small rotor teeth, m is an integer and (Nr±2k) / 3, Nr is 3n±1, n is an integer not less than 1, and k is an integer not less than 1 and not more than 4.

The invention provides a vertical and horizontal double type efficient pulp shredder driven by a single motor and without a blind region. The vertical and horizontal double type efficient pulp shredder mainly comprises a shell structure, a driving device, a transmission device and a pulp shredding device, and is characterized in that a vertical pulp shredder rotor and a horizontal pulp shredder rotor are driven by the single motor, and a worm wheel and worm rod transmission mechanism is used for realizing synchronous movement of the vertical pulp shredder rotor and the horizontal pulp shredder rotor, so that all-directional pulp shredding of the pulp shredder is realized, and a bottom pulp shredding blind region is eliminated. By the aid of the vertical and horizontal double type efficient pulp shredder, the whole pulp shredding of shredded materials is realized by the vertical pulp shredder rotor, and the pulp shredding of a bottom working blind region is realized by the horizontal pulp shredder rotor; the supporting of the vertical pulp shredder rotor and the horizontal pulp shredder rotor, and the sealing of the worm wheel and worm rod transmission mechanism are realized by a protection cover with a bearing hole; a fluid 'rotary cake' is eliminated by a convex baffle with a sector-shaped structure and the crushing efficiency is increased; the equipment has high efficiency and low energy consumption.

The invention discloses an electric fluid pump and a motor stator structure therefor. The electric fluid pump comprises a pump case, a motor, and an impeller, wherein the motor and the impeller are disposed in the pump case. The impeller is in driving connection with the motor to be driven by the motor to rotate. The pump case is provided with a fluid inlet and a liquid outlet. The motor comprises a stator and a rotor, and an air gap is formed between the stator and the rotor. The stator comprises a stator core, and the stator core comprises a stator yoke and a plurality of tooth parts, wherein the tooth parts extend inwards in the radial direction along the stator yoke. Each tooth part is provided with a winding coil. The tooth parts comprise a plurality of first tooth parts and a plurality of second tooth parts, wherein the first and second tooth parts are alternately arranged in the peripheral direction. The external surface of the stator yoke is provided with flow guide trenches corresponding to the first tooth parts. The shapes of the first tooth part are different from the shapes of the second tooth parts, thereby enabling a magnetic circuit of the stator core to be distributed symmetrically.

The invention discloses a spherical pump with static-pressure supports. The spherical pump comprises a cylinder cover (1), a cylinder block (5), a piston (2), a rotating disc (4), a main shaft (6) anda main shaft bracket (7); the cylinder cover (1) is connected with the cylinder block (5) to form a spherical inner cavity; a chute (601) is formed in the upper end surface of the main shaft (6); a slide shoe (403) at the shaft end part of the rotating disc is inserted in a chute (601) at the upper end of the main shaft (6); the piston (2) is movably connected with the upper end of the main shaft(6) after hinging with the rotating disc (4) to form a rotor; the static-pressure supports are arranged between two parallel side surfaces of the slide shoe (403) and the chute (601); and the static-pressure supports comprise first liquid flowing channels (404) and second liquid flowing channels (405) arranged on the rotating disc (4), and liquid pressure bearing grooves arranged on two parallelside surfaces of the slide shoe (403). The spherical pump has the advantages of eliminating the unbalance force in the operation process of the spherical pump and reducing the power consumption of thespherical pump.

The invention discloses a two-degree-freedom mixed type stepping motor with a non-spherical orthogonal structure and a method thereof. The motor comprises a pedestal, and a first-degree-freedom motor installed on the pedestal. The rotating shaft of the first-degree-freedom motor is of a semi-cylindrical shape, and the external diameter of the rotating shaft is greater than the external diameter of a stator iron core of a second-degree-freedom motor. A notch is arranged on the planar side of the rotating shaft, so that the second-degree-freedom motor is integrally embedded in the notch. The rotating shaft of the second-degree-freedom motor is of a complete cylinder shape and is provided with an output shaft. The central axis of the rotating shaft of the first-degree-freedom motor is positioned on a horizontal plane and is set as an X-axis, and the central axis of the rotating shaft of the second-degree-freedom motor is vertically orthogonal to the X-axis. The central axis of the rotating shaft of the second-degree-freedom motor is set to be Y-axis, and the rotating shaft of the first-degree-freedom motor drives the second-degree-freedom motor to integrally rotate about the X-axis within a certain scope. The axis of the output shaft is vertically orthogonal to the Y-axis, thereby realizing two-degree-freedom movement of the output shaft.

The invention discloses a double-valve-seat regulating ball valve comprising a valve body, valve seats and a valve element. The valve body comprises a main valve body and two auxiliary valve bodies fixed to the two sides of the main valve body; the two valve seats are located between the two auxiliary valve bodies, and the two valve seats are located on the opposite two sides of the valve body inthe radial direction; and the valve element is located between the two valve seats. The double-valve-seat regulating ball valve solves the problems that in the prior art, the valve element of the ballvalve wears quickly and the rotating torque of a valve stem is larger, and the aims of improving the two-way sealing performance of the ball valve, improving the adjustment precision and reducing thevalve element wear and rotating torque are achieved.

The invention discloses a cutter system for a numerically-controlled cutting bed. The cutter system comprises a spindle mounting seat, an eccentric mechanism is arranged on the spindle mounting seat and connected with a cutter through a connecting rod component, and a blade of the cutter corresponds to a cutter disc below the spindle mounting seat. By increase of an eccentric distance, the rotating speed is controlled in a certain range, increasing of the rotating speed of a motor is avoided, and accordingly reciprocating frequency of the blade is reduced, and cloth adhesion is avoided; further, by transmission connection between an eccentric shaft with a first counterweight and a balance wheel device, increasing of noise and vibration due to increasing of unbalance force can be avoided. In addition, by virtue of a disc locking device, full-automatic disc locking can be realized without manual participation; by withdrawing of a follow-up air cylinder, a certain space between the lockedcutter disc and cloth can be reserved, and in cutting operation of the numerically-controlled cutting bed, problems of twisting, turning and the like caused by the fact that the locked cutter disc drives the cloth to turn up can be avoided, so that cutting quality is improved.

The invention discloses a simulation method for eliminating the unbalanced force of dynamic mesh of high-speed rail pantograph-catenary dynamic behavior. : time of each simulation step t In , the dynamic grid method is used to encrypt the grid around the contact point on the contact line; Step 3: Eliminate the unbalanced force in the dynamic grid through an iterative algorithm; Step 4: Through Newmark‑ β Algorithm to solve simulation step time t response; Step 5: Repeat steps 2 to 4 until the pantograph traverses the entire contact line to complete the pantograph-catenary dynamics simulation; the invention can eliminate the unbalanced force generated by the dynamic grid technology, and is used for nonlinear finite element solution , improve the solution efficiency and solution accuracy.

The invention discloses a three-way control valve for a high-pressure place. The three-way control valve comprises a valve body, a guide cover, a valve element, a valve rod, an upper valve seat, a balancing cylinder, a guide ring, an O-shaped sealing ring, a piston, a valve cover, a filler, a lower valve seat, a connecting pipe and an execution mechanism, wherein the valve body is provided with a flow passage port A, a flow passage port B and a flow passage port C. When the three-way control valve for the high-pressure place works, the valve element and the valve rod are driven by the execution mechanism to move up and down between the upper and lower valve seats in the valve body to automatically control two paths of fluids to be combined into one path of fluid or split one path of fluid into two paths of fluids, so that the unbalanced force of a medium on the valve element is eliminated, and the output force of the execution mechanism is greatly reduced; the guide ring is arranged on the piston, and the guide cover is arranged at the bottom end of the valve element, so that a guide function is realized, the valve can more stably work, the problems of difficulty in opening and closing, instable movement and great vibration in a running process and the like when the valve is used for the high-pressure place are solved, and the requirements of use under a high-pressure working condition are met.

The invention provides a single-motor-driven vertical and horizontal double-type high-efficiency pulper without blind spots, which mainly includes a shell structure, a driving device, a transmission device and a pulping device. It is characterized in that the rotor of the vertical pulper and the rotor of the horizontal pulper are driven by a single motor, and the synchronous movement of the rotor of the vertical pulper and the rotor of the horizontal pulper is realized through the transmission mechanism of the worm gear to realize the full operation of the pulper. Azimuth pulping eliminates the blind area of ​​pulping at the bottom. In the present invention, the overall pulping of the crushed material is realized through the rotor of the vertical pulper, the pulping of the blind working area at the bottom is realized through the rotor of the horizontal pulper, and the rotor of the vertical pulper and the horizontal pulper are realized through the protective cover with bearing holes The support of the rotor and the sealing of the worm gear transmission mechanism eliminate the fluid "rotary cake" and increase the crushing efficiency through the raised baffle of the fan-shaped structure. The equipment has high efficiency and low energy consumption.

The invention relates to a new type of punching machine, which includes a frame, a driving device, a crankshaft, a first crankshaft connecting rod, a second crankshaft connecting rod, a first horizontal guide block, a second horizontal guide block, a first connecting rod, a second Transfer link, the first vertical guide link, the second vertical guide link, the first lever, the second lever, the first mold adjusting connecting plate, the second adjusting mold connecting plate, the first slider connecting rod, the second Slider connecting rod, slider and worktable, the driving device drives and connects the crankshaft, and the crankshaft drives and connects the first crankshaft connecting rod and the second crankshaft respectively, and the slider is located at the working table. Above the table; the new punching machine has simple structure, small inertia, high precision, long dwell time at the bottom dead center, smooth stamping surface of the stamped workpiece, improves the quality of the stamped workpiece, receives small reverse impact force, and has little wear on the equipment. The service life of the equipment is extended.

The invention belongs to the technical field of closing devices, and particularly relates to a door with an embedded protecting device. The invention aims at providing a door enabling the service life of the door and the protecting device to be prolonged. To solve the above problem, according to the technical scheme, the door with the embedded protecting device comprises a door sheet and a door frame, wherein the door sheet is connected with the door frame through hinges. The door further comprises an elastic sheet and / or an elastic column, and one end of the elastic sheet and / or the elastic column is fixedly connected with the inner side of a vertical frame. A first clamped board and a second clamped board are also arranged inside the door sheet, and the first clamped board and the second clamped board are fixedly connected with the inner side of the door frame to form a hollow area which matches with the elastic sheet and / or the elastic column. The hollow area further includes an opening and a bottom which are positioned on different sides inside the door sheet, and the elastic sheet and / or the elastic column extend / extends into the hollow area from the opening.

The invention relates to a method for eliminating unbalanced force of a single-blade pump impeller. The method is characterized by comprising a step of determining a blade gravity shifting angle (1), non-thickening gravity position (2), a thickening central line (3), a single side thickening range (4), a thickening starting line (5), a thickening ending line (6), a thickening radius starting point derivation axes distance (7), a hub thickening radius (8) and a hub thickening thickness (9). Based on a key point, when the blade is designed, unbalance of the single-blade pump impeller is considered; solid modeling is performed to the blade by a three-dimensional modeling software PROE; a gravity position is found in the software so as to count a derivation angle; the hub is thickened or the blade is thickened on a position opposite to the gravity position; by dint of a pre-accentuation method, weighted quality can be estimated; data is fed back to an impeller mould; therefore, the impeller achieves quality balance initially.

The invention discloses an eccentric balance mechanism which comprises an eccentric shaft provided with a counterbalance and a balance wheel device, wherein the balance wheel device is in drive jointwith the eccentric shaft. The eccentric distance D of the eccentric balance mechanism is 15-30 mm; the eccentric balance mechanism is applied to a numerical control cutting bed, converts rotation motion of a motor into pushing a piston to do reciprocal rectilinear motion, and can change the existing problem that the working capacity of equipment is poor due to small eccentric distance. The eccentric balance mechanism is provided with the eccentric shaft provided with the counterbalance and the balance wheel device; the balance wheel device is in drive joint with the eccentric shaft; the resultant force point of a first balance gravity center A and a second balance gravity center B is the gravity center C of the balance mechanism, and the gravity center C is positioned on the circle centerof an eccentric spindle, wherein the counterbalance and a connecting rod component arranged on an eccentric inertia shaft in a sleeving manner constitute the first balance gravity center A, and the balance wheel device constitutes the second balance gravity center B, so that the situation that eccentric motion generates unbalanced force under the gravity action of the connecting rod component arranged on the eccentric inertia shaft is eliminated, and necessarily caused vibration and noise due to the action of the centrifugal force during the high-speed rotation process are reduced.

The invention discloses a novel universal valve body tooling, which comprises a lower connecting plate, a positioning plate, an upper connecting plate and a connecting plate which are sequentially connected and fixed, the lower connecting plate and the upper connecting plate are arranged oppositely, the positioning plate and the connecting plate are arranged oppositely and It is arranged between the lower connecting plate and the upper connecting plate, and the connecting plate, the positioning plate, the upper connecting plate and the connecting plate form an accommodation space; the positioning plate is provided with a connecting hole adapted to the fixing piece on the lathe, and the lower connecting plate is provided with There is a positioning mandrel, and the positioning mandrel is connected with the lower connection plate, and the upper connection plate is provided with a compression screw, which is threadedly connected with the upper connection plate, and the end of the compression screw facing the accommodation space is provided with a compression plate, which is pressed The plate is connected with the compression screw, and an avoidance hole is arranged on the connecting plate. The invention provides a novel universal valve body tooling, which has the advantages of fast loading and unloading of workpieces, high positioning accuracy and the like.

The invention relates to a low-temperature regulating valve. Sleeves are fixedly installed in a valve body. A valve element is installed in the sleeves in a sliding manner. A spring energy storage seal ring is arranged between the outer wall of the valve element and the inner walls of the sleeves. A supporting sleeve is fixedly installed on the sleeves. A seal base is fixedly installed on the supporting sleeve. A corrugated pipe part is fixedly installed on the lower surface of the seal base and is arranged in the supporting sleeve. An upper valve deck is fixedly installed on the seal base. A seal ring is arranged between the upper valve deck and the seal base. The bottom of the upper valve deck is shaped like a barrel. A valve rod is fixedly installed on the valve element and sequentially penetrates the sleeves, the corrugated pipe part, the seal base and the upper valve deck. A valve rod seal ring is arranged between the seal base and the valve rod. A packing assembly is arranged between the upper valve deck and the valve rod. An isolation barrel part is arranged on the supporting sleeve in a sleeving manner and is fixedly connected with the valve body and the upper valve deck. By means of the low-temperature regulating valve, the sealing performance of the valve is improved, the installation space is saved, the deformation of the valve rod is very small, the sealing performance is excellent, and the service life of the valve is long.

The invention discloses a method for detecting dynamic balance faults of multi-disc shafting of rotating machinery without test weight. By testing the frequency response function between the vibration of the bearings on both sides of the rotor and the impact force received by the journal, according to the actual measurement of the two ends of the rotor The excitation force on the journals on both sides of the rotor is calculated based on the vibration of each bearing, and the unbalanced force is eliminated through the dynamic balance weights on the discs at both ends of the rotor. This method can realize the dynamic balance test without test weight, and directly detect the magnitude and angle of the unbalanced force from the vibration test data; at the same time, it also comprehensively considers the vibration in the vertical and horizontal directions and the coupling effect between them, and has not passed The method of establishing the rotor dynamics model to obtain the influence coefficient has a high accuracy of the dynamic balance test; in addition, this method can effectively reduce the number of dynamic balance tests, improve the efficiency of the dynamic balance test of the rotating machine, and reduce the risk of the dynamic balance test, especially for rotating machines. The shaft dynamic balance fault detection of the machine under the real state of the whole machine.

The invention discloses a combined type two-degree-freedom mixed type stepping motor with an orthogonal cylindrical structure for a robot and an application thereof. The combined type two-degree-freedom mixed type stepping motor comprises a first-degree-freedom motor, a second-degree-freedom motor and an output shaft, wherein the first-degree-freedom motor is of a cylindrical structure, the first-degree-freedom motor rotates about a rotating axis which is the diameter direction of the bottom of the cylindrical structure, the second-degree-freedom motor is of a cylindrical structure and is arranged on the outer edge of the first-degree-freedom motor, the axis center of the second-degree-freedom motor is vertically orthogonal to the axis center of the first-degree-freedom motor, the second-degree-freedom motor rotates about a rotating axis which is the shaft center of the first-degree-freedom motor, and the second-degree-freedom motor retains independent movement relative to the first-degree-freedom motor during the rotating process of the first-degree-freedom motor, so that the output shaft arranged on the outer side of the second-degree-freedom motor realizes two-degree-freedom movement. The research and development period of a product is shortened, and the performance of the product is improved. Practical utilization, industrialization and commercialization of multi (two)-degree-freedom motors are further facilitated.