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103results about How to "Change control" patented technology

A pressure control method for excavator traveling mechanism

The invention provides a method for controlling the pressure of a walking mechanism of an excavator. The method is characterized by comprising the following steps of: connecting a walking pressure switch to a pipeline between a walking cutoff valve and a convergence valve; detecting by using a pilot pressure sensor to obtain a specific value of a pilot pressure; judging whether the walking mechanism is in an idle speed state or walking state according to the pressure value; when the walking mechanism is in the walking state and if the pilot pressure is greater than a third set threshold value, opening a secondary pressure increasing valve by using an electric control system; making pressure increasing pilot oil flow to a main overflow valve through the secondary pressure increasing valve;increasing the set pressure of the main overflow valve by 10-15 percent; and simultaneously, judging the on and off state of the walking pressure switch by using the electric control system. In the invention, only one walking pressure switch is added in the conventional hydraulic system, and the control way is changed simultaneously, so that the walking capability and the practical operation capability of the excavator can be increased, the oil consumption and the noise are effectively lowered, the service life of the hydraulic system is prolonged, and the requirement of a user is better met.
Owner:龙工(上海)挖掘机制造有限公司

Controlled aluminum electrolysis cell anode covering sealing structure

The invention discloses a controlled aluminum electrolysis cell anode covering sealing structure. The structure comprises a structural frame fixedly covering an electrolysis cell and a plurality of sealing plates laid on the structural frame, wherein a notch through which an anode guide rod passes and a blanking hole taken as a smoke channel are formed in each of part of sealing plates. Each sealing plate comprises a large surface side part sealing plate, an upper part anode break joint sealing plate, an end part sealing plate, a blanking hole sealing plate and an anode center joint sealing plate, wherein the large surface side part sealing plate is fixedly laid on the side surface of the long side of the structural frame, the end part sealing plate is movably laid on the end face of the short side of the structural frame, and the upper part anode break joint sealing plate, the blanking hole sealing plate and the anode center joint sealing plate cover the top of the structural frame. Compared with an existing mulch manner, the controlled aluminum electrolysis cell anode covering sealing structure has the advantages that labour intensity and production cost can be obviously reduced, electrolysis process control level is improved, continuous, stable and efficient production can be easily realized, smoke collecting efficiency is high, workshop environment is improved, and environmental pollution is reduced.
Owner:CENT SOUTH UNIV

Multi-strand reed numerical control machine steel wire tension detection and rotary rope-twisting device

The invention relates to a reed numerically-controlled machine tool steel wire tensity examination and the revolving twist. Rope installment, which belongs to the area of many reed numerically-controlled machine tool process technology. This invention installment mainly includes the reducing decelerate the electrical machinery, the transmission gear gudgeon, the steel wire tensity sensor system, the steel wire guide mechanism and so on. Its characteristic is as follows: the servo decelerates electrical machinery is one or two, the transmission gear including the drive gear and the driven gear is one pair or two pairs, and the gudgeon is one decked or double-decked. Because this invention installment s simply to be controlled, it raises the steel wire introduction's efficiency and many reed production's efficiency, reduces the labor intensity, and avoids the steel wire having the plastic deformation. Besides it raises many reed product manufacture qualified rate and the service life, and can survey the steel wire's actual tensity, thus it guaranteed each steel wire's tensity uniformly and so on. Therefore this invention may widely used in many reed processing profession, many reed which is produced by this invention can be widely applied in the frequency reciprocating motion equipment of the high sky in the automobile, aviation, machinery department and so on.
Owner:CHONGQING UNIV

Method and device for continuously winding a strand-shaped winding material

InactiveCN103874644AChange controlChange rotational motionFilament handlingChange positionsConductor Coil
The invention relates to a method and to a device for continuously winding a strand-shaped winding material (34) into spools (6). The spools (6) are alternately wound on two winding spindles (3.1, 3.2) retained on a winding revolver (2), wherein the winding spindles (3.1, 3.2) are driven by two separate spindle drives (19.1, 19.2). In order to maintain a constant winding speed during the winding of the spools, a movable jockey arm (14) of a jockey arm apparatus (13) is provided, which jockey arm produces a loop having a slack (35) on the fed winding material (34). The slack of the loop of the winding material is used to control a spindle rotational speed of one of the winding spindles. The winding spindles are arranged on a winding revolver that, by means of a rotational motion, guides the winding spindles alternately between a changing position and an operating position for transferring the winding material. According to the invention, in order to ensure an even acceptance of the fed winding material during a changing phase, a rotational motion or a rotational speed of the winding revolver is controlled according to the slack of the loop of the winding material. For that purpose, the revolver drive (21) of the winding revolver (2) is coupled to a rotational-speed control unit (17) of the jockey arm apparatus (13).
Owner:STC二捻股份有限公司

Particle sorting device

Provided is a particle sorting device which can properly enable particles that should be separated to be separated from other particle groups even if the pressure of air supplied to an air ejecting mechanism is reduced. The device is provided with a transportation mechanism which enables a particle group to pass through a measuring object part in a one-layer state and in a transversely spreading state of spreading in a transverse direction, a light reception mechanism which receives light from the measuring object mechanism, a lighting mechanism which illuminates the measuring object part, an evaluation processing mechanism which judges whether a particle to be regarded as an objected to be separated based on whether the value of the amount of received light deviates from a proper range of the amount of light, and an air ejection mechanism which enables the particle that is judged to be regarded as an object to be separated to be separated. The transportation mechanism freely alters and adjusts transportation flow of the particle group to constitute action of controlling the transportation mechanism, enabling the transportation flow when the detected pressure detected by a pressure detection mechanism which detects the pressure of air supplied to the air ejecting mechanism from an air supply source is relatively low to be smaller than when the detected pressure is relatively high.
Owner:KUBOTA LTD
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