119 results about "Compression action" patented technology

This invention describes a practical application of noise reduction in hearing aids. Although listening in noisy conditions is difficult for persons with normal hearing, hearing impaired individuals are at a considerable further disadvantage. Under light noise conditions, conventional hearing aids amplifying the input signal sufficiently to overcome the hearing loss. For a typical sloping hearing loss where there is a loss in high frequency hearing sensitivity, the amount of boost (or gain) rises with frequency. Most frequently, the loss in sensitivity is only for low-level signals; high level signals are affective minimally or not at all. A compression hearing aid is able to compensate by automatically lowering the gain as the input signal level rises. This compression action is usually compromised under noisy conditions. In general, hearing aids are of lesser benefit under noisy conditions since both noise and speech are boosted together when what is really required is a reduction of the noise relative to the speech. A noise reduction algorithm with the dual purpose of enhancing speech relative to noise and also providing a relatively clean signal for the compression circuitry is described.

A pump controller causes a first plunger pump and a second plunger pump connected in series or in parallel to perform intake and compression actions alternately at substantially constant cycles, sets a pressurizing chamber of one of the plunger pumps to a state of a higher pressure than the pressurizing chamber of the other plunger pump, and performs flow rate control by adjusting lift amounts of the first plunger and the second plunger. Thus, it is possible to provide a pump for liquid chromatograph, and a liquid chromatograph, which are capable of reducing pulsations even when an ejection flow rate is changed.

The invention relates to an internal combustion engine that can be operated in compression ignition mode, the engine comprising a fuel injector for each cylinder; a fuel injection controller for controlling fuel injection quantity and a piston in each cylinder whose compression action causes a mixture of air and fuel to be ignited. The engine is further provided with inlet and outlet valves and sensors for measuring various engine operating parameters. During compression ignition mode, the control unit controls the fuel injector to perform a first fuel injection before top dead center of the exhaust stroke during a period of negative valve overlap, and a second fuel injection during the piston compression stroke. The control unit may perform a switch between a first fuel injection strategy and at least one further fuel injection strategy in response to a change in load demand on the engine.

The invention discloses a spiral sludge dewatering equipment with a collapsable shaft. The inside of a shell is provided with a plurality of annular fixed plates and annular movable plates which are mutually alternate and are concentric; a spiral shaft runs through the inside of each of the annular fixed plates and the annular movable plates to form a filtration body; a sludge feeding box and a sludge discharge box are arranged at both ends of the spiral shaft respectively so as to ensure that the sludge is dehydrated under the compression action of the filtration body and then enters the sludge discharge box; and a filtrate flows out from the gaps between the fixed plates and the movable plates during the operation. By designing that the screw pitch of the spiral shaft is gradually reduced and the diameter of the spiral shaft begins to be gradually increased at certain specific position along the direction of the sludge discharge box, and setting a lead angle to be between 13.5 and 14.5 DEG at the same time, the dehydration efficiency of the sludge is improved, the damage caused by the overlarge pressure on the movable plates during the treatment caused by the overlarge lead angle is also avoided, and the service life of the movable plates is prolonged.

The invention discloses a fine grinding device for buckwheat high protein flour production and processing. The fine grinding device comprises a grinding box, a grinding motor, a rotary plate, a grinding device part, a grinding groove, striking balls and a receiving groove; supporting springs are connected between the grinding motor and the grinding box; an output shaft of the first driving motor faces forward; a special-shaped gear is in interference fit with the output shaft of the first driving motor; the grinding device part is arranged on the lower side of a second sliding block; two propping rods are slidingly arranged on a baffle plate; and the striking balls are arranged at the upper ends of the propping rod by threads. The grinding device part can, by adjusting the rotating speed of the grinding motor, allow centrifugal force on the rotary plate to be different, and the sliding range of the second sliding block on a second sliding rail is changed, so that the grinding range ofthe grinding device part is changed; and the grinding device part can be driven to move down integrally in the grinding process to exert compression action on buckwheat grinding, so that ground flouris small in granularity and is more delicate.

An internal combustion engine provided with a variable compression ratio mechanism able to change a mechanical compression ratio and an actual compression action start timing changing mechanism able to change a start timing of an actual compression action. The mechanical compression ratio is made maximum so that the expansion ratio becomes 20 or more at the time of engine low load operation, while the actual compression ratio at the time of engine low load operation is made an actual compression ratio substantially the same as that at the time of engine high load operation.

A slip type pipe fitting for joining two spaced apart plastic pipe ends is disclosed. The fitting includes: a first insert 12 having an elongate pipe support portion 14, insertable into an internal bore of a first plastic pipe end 11, and a distal end 16 in use projecting outside the first pipe end 11 and having a first annular seal 17; an elongate hollow pipe connector 30 defining a bore 32 and having first and second connector ends 40, 50, the inner bore 32 receiving the distal end 16 and first annular seal 17 of the first insert 12 for sliding movement and sealing therein; and a first compression joining assembly including a first end nut 42 for mechanically joining the first connector end 40 to the first pipe end 11 by a compression action sandwiching the first pipe end 11 between the first end annular member 42 and the pipe support portion 14 thereby locking the connector 30 with respect to the first pipe end 11. In use the support portion 14 extends into the first pipe end 11 an axial distance AL such that said locking can occur over a range of axial positions.

The invention discloses a compression hemostat applied to esophagus and fundus ventriculi. The compression hemostat comprises a stent which can expand and is provided with a channel in the middle, and a bleeding arresting dressing fixed on the outer side of the stent. When massive hemorrhage caused by varicose veins of esophagus and fundus ventriculi occurs, the compression hemostat is placed at a bleeding position by using a stent inserter for arresting bleeding, and the bleeding arresting dressing is closely contacted with the bleeding position under the compression action of the expanding stent, so that the aim of arresting bleeding is fulfilled. The invention has the beneficial effects that: the compression hemostat is easy to operate and is convenient to use, and massive hemorrhage of esophagus and fundus ventriculi can be controlled effectively.

The invention discloses a test fixture of acupuncture intensity of battery separator paper, comprising an upper mold and a lower mold which are used for holding the battery separator paper to be tested, the lower mold is fixed on the basis, and the upper mold and the lower mold are respectively provided with avoidance holes, the positions of the avoidance holes are corresponding to each other; thetest fixture further comprises a needle head component and a sensor connected with the needle head component, the sensor is fixedly connected with external testing equipment, the needle head component is provided with a needle head which corresponding to the positions of the avoidance holes, so as to avoid from piercing the separator paper to be tested at the positions of the avoidance holes; theneedle head component comprises a connecting piece, and a sensor adaptor and an acupuncture connector which are respectively connected at two ends of the connecting piece. The test fixture can be assembled on the existing tensile tester, the acupuncture intensity of the separator paper is test by utilizing the function of compression action of the tensile tester; the structure of the test fixtureis simple and the usage thereof is convenient.

The invention relates to a method for testing memory via compressing data, which uses compression algorism to test the memory, wherein it comprises: first dividing the memory into at least three blocks as initial memory block, buffer memory block and target memory block; then storing the sample data into initial memory block; using compression algorism to compress the sample data while the buffer data is stored in buffer memory block; storing the compressed sample data into target memory block; at last, decompressing the compressed sample data; compressing decompressed sample data with original compress data, to judge if the memory has mistake.

The invention relates to a central pulsation negative-pressure arc welding device and method, and belongs to the technical field of welding equipment and methods. An inner cavity of a hollow tubular electrode and the center of an arc below the hollow tubular electrode enter a periodic negative-pressure state by virtue of an air extraction device, and when the center of the arc is in a normal-pressure state, the arc is in a free arc form; when the center of the arc is in a negative-pressure state, the arc is in a restrained state under the compression action of external atmospheric pressure; therefore, the arc is switched between a free arc and a restrained arc to implement the central pulsation negative-pressure arc welding method. The pulsation arc produced by the welding device and method has oscillation and stirring functions for a welding pool, so that liquid metal forms tiny isometric crystals, the formation of air holes is suppressed, and the mechanical performance of a welding joint is improved; the pulsation frequency and duty ratio of the arc are regulated to accurately control the oscillation and stirring of the welding pool, the welding penetration and heat input.

An internal combustion engine provided with a variable compression ratio mechanism able to change a mechanical compression ratio and an actual compression action start timing changing mechanism able to change a start timing of an actual compression action. An amount of intake air in accordance with the required load is fed into a combustion chamber by controlling the closing timing of the intake valve, while a pressure, temperature or density in the combustion chamber at the end of a compression stroke is maintained substantially constant regardless of the engine load by controlling the mechanical compression ratio.

The invention relates to an injection molding production method of a transparent product with a thick-walled curved surface structure, and in particular relates to an injection molding production method of a transparent plastic product with a complex curved surface, high surface quality requirement and good optical property. According to the injection molding production method provided by the invention, a sprue with a slit expansion type structure and a continuous stepwise variation thickness is adopted, so that the problems of a jetting phenomenon of melt filled for molding a thick-walled product and incomplete filling and insufficient injection caused by premature cooling of the sprue are avoided. The melt filling resistance can be effectively reduced by expansion of a mould cavity and low-speed injection, so that the orientation of molecular chains of materials and the flow-induced residual stress of the product are reduced, and the buckling deformation and optical defects caused by the stress are reduced. Compression action subjected to equal pressure control is achieved on the whole molded surface of the mould cavity, a role in compensating cooling shrinkage of the product can be played, so that the residual stress caused by pressure maintaining of a screw rod is reduced, the size precision of a geometric shape is guaranteed, and the high-precision production and molding of the product can be achieved.

The invention discloses a plastic bottle label removing and compression recovery robot. The robot comprises a machine frame, a feeding hopper, a transmission mechanism, a label removing working head,a stamping working head, a feeding disc and a storage bin; machine frame angle iron bolts are connected and fixed on the storage bin; the machine frame comprises a horizontal motor, a bearing seat andtwo pairs of guide rails; a cylindrical recess is arranged in the middle of the storage bin for arranging a vertical motor; the horizontal motor at the top of the machine frame drives the label removing working head and the stamping working head; the lower portion of the machine frame is provided with the vertical motor for driving the feeding disc; and during intermittent rotation of the feedingdisc, a crankshaft B and a crankshaft A of the transmission mechanism sequentially complete the label removing and compression actions. The system is convenient to operate, environmental friendly andeconomical, the space of plastic bottles and transportation cost can be reduced, the plastic bottles with labels being removed can be directly crushed, and thus the recycling value is increased.

A spark ignition type internal combustion engine comprises a variable compression ratio mechanism able to change a mechanical compression ratio, an actual compression action start timing changing mechanism able to change a start timing of an actual compression action, and an exhaust valve. At the time of engine low load operation, the mechanical compression ratio is maximized to obtain a maximum expansion ratio, and the actual compression ratio is set so that no knocking occurs. The maximum expansion ratio is 20 or more. The closing timing of the exhaust valve at the time of engine low load operation is made substantially intake top dead center. Due to this, even if operating the internal combustion engine in a state of a large expansion ratio, the temperature of the exhaust purification catalyst can be maintained at a relatively high temperature.

The invention discloses a homodromous self-cleaning double-screw extruder with a stretching function. The homodromous self-cleaning double-screw extruder with the stretching function comprises a machine barrel, a first screw and a second screw. The cross section of the first screw and the cross section of the second screw are both formed by multiple sections of circular arcs which are unequal in radius of curvature, and the cross section of the first screw and the cross section of the second screw are different in shape. The invention further provides a processing method of the homodromous self-cleaning double-screw extruder with the stretching function. According to the homodromous self-cleaning double-screw extruder with the stretching function and the processing method of the homodromous self-cleaning double-screw extruder with the stretching function, when the first screw and the second screw which are different in cross-section shape rotate in an identical direction, periodical change happens to a cross-section shape of a flow passage, so that a compression action and a squeezing action are applied on materials in the flow passage, a flowing space of the materials is compressed and expanded in a periodical mode, and therefore a chaotic mixing effect is generated, a mixing and heat transfer process is strengthened, a thermal and mechanical process which is plasticized is largely shortened, energy consumption is low, an energy-saving and consumption-reducing effect is notable.

The invention belongs to the field of hydraulic servo control, and discloses a hydraulic tandem elastic drive mechanism. The hydraulic tandem elastic drive mechanism comprises a bottom plate, a hydraulic cylinder and an elastic unit, wherein a location frame is connected to the output shaft of the hydraulic cylinder; the elastic unit comprises a bearing unit, a guide shaft, compression spring seats and compression springs; the bearing unit comprises a bearing seat arranged on the bottom plate and a first linear bearing arranged in the bearing seat; two shaft rings are arranged on the guide shaft; two second linear bearings are installed on the guide shaft in a penetrating manner; the shaft shoulders of the two second linear bearings are located between two location plates; the corresponding compression spring seat is installed on the shaft shoulder of each second linear bearing; and the corresponding compression spring is installed on each compression spring seat and installed on the guide shaft in a penetrating manner. The hydraulic tandem elastic drive mechanism disclosed by the invention is capable of simulating the stretching and compressing action of a joint, is capable of transferring a drive force in a stretching direction and a compressing direction, occupies less space, and is light in weight.

The invention relates to an improvement on a bus bar branched compression joint structure, and relates to a compression joint method thereof simultaneously, belonging to the technical field of electric connecting facilities. A compression joint branched bus bar comprises a main line bus bar and a branched line bus bar; the middle part of the tip of a connecting end between the branched line bus bar and the main line bus bar is provided with a first recess; both sides of the tip are provided with symmetrical recesses, so that a compression joint end with symmetrical lateral extension feet is formed; one side of a branched part of the main line bus bar is provided with concave gaps which are matched with the shapes of the symmetrical lateral extension feet; sawtooth sides embedded into corresponding sides of the concave gaps during compression joint are formed on one sides of the lateral extension feet, which correspond to the tip of the connecting end of the branched line bus bar; after the main line bus bar is in compression joint with the branched line bus bar, at least one roulette is formed in one side of each lateral extension foot, which is opposite to each sawtooth side; and a roulette pin is wedged into each perforation hole. The improvement disclosed by the invention is reasonable and skillful, convenience is brought to implementation, deformation and cold solder joints caused by welding can be avoided, and micro-gaps possibly existing in tooth valleys can be closed through the compression action of the roulette pin on the sawtooth side, so that the contact resistance is reduced effectively.

The invention relates to a drum with a function of quickly opening a side cover. The drum comprises a body, the side cover and a damping structure. The damping structure further comprises a damping seat, a seat with magnetic blocks, a damping disc and an adjusting button, the damping disc is matched with the magnetic blocks. The drum is characterized by further comprising a resistance fine adjustment assembly and a rough adjustment assembly, the seat is supported on the damping seat, the fine adjustment assembly and the adjusting button are mounted on the damping seat, and the damping seat isclamped on the inner wall of the body; a mounting hole is formed in the side cover, the adjusting button can penetrate the mounting hole, an elastic clamp leg which axially extends is mounted on the inner wall of the side cover, a clamp seat is arranged on the damping seat, a bayonet which is clamped with the elastic clamp leg is arranged on the clamp seat, a button which is butted to a first spring is radially mounted on the body and corresponds to the bayonet, the tail of the button corresponds to the elastic clamp leg, and the elastic clamp leg can be driven to be separated from the bayonetalong with internal compression actions on the button. The drum has the advantages that the side cover can be quickly opened by means of operation by people with bare hands, and the drum is simple inintegral structure and convenient to operate.