52results about How to "Overcome spring force" patented technology

The invention relates to a domestic bowl washing machine, which comprises an upper cover, a tube body, a bottom case, an internal cleaning device and an external cleaning device, wherein the upper cover is overlapped on the upper end surface of the tube body, the lower edge of the upper cover is provided with a convex lug, the convex lug is rotatablely connected with the tube body, the bottom case is fixedly connected with the lower end of the tube body, the internal cleaning device is in contact with the upper cover, the external cleaning device is fixedly connected with the tube body and the bottom case, the internal cleaning device and the external cleaning device are coaxially arranged and are in contact with each other, and at least two symmetrically distributed guide posts are arranged in the upper cover. The domestic bowl washing machine has the advantages that the speed is high, the efficiency is high, the cleaning is clean, the effect is good, the function is complete, the electricity, the water and the time are saved, the structure is compact, the appearance is attractive, the operation is easy, the carrying and the placement are convenient, and the manufacturing cost islow.

The invention provides a fast-extending and slow-contracting hydraulic cylinder. The hydraulic cylinder mainly comprises a cylinder barrel, a piston rod, a piston, a buffer sleeve, a jet flow passage, an acceleration sleeve, a guide buffer sleeve, an end cover B and an end cover A. The fast-extending and slow-contracting hydraulic cylinder is characterized in that the piston rod can extend fast and contract slowly. According to the fast-extending and slow-contracting hydraulic cylinder, the buffer sleeve with one inwardly concave side and an angular jet flow passage are arranged, so that the slow contracting of the piston rod is realized; the parabola-shaped acceleration sleeve is arranged, so that the fast extending of the piston rod is realized; the parabola-shaped inwardly-concave guide buffer sleeve is arranged, and an annular blind hole is formed in the guide buffer sleeve, so that buffer stop of the acceleration sleeve is realized, the extension length of the piston rod is increased, and soft start contraction of the piston rod is realized; a check valve is arranged on the cylinder barrel, so that high-pressure air in the cylinder is discharged; elastic pads are arranged between the end cover B and the guide buffer sleeve, so that impact on the guide buffer sleeve generated by fluid is absorbed; oil grooves and sealing rings are arranged on the outer side surface of the piston, so that oil leakage, temporary storage of impurities in oil and sealing of the piston are realized.

The invention relates to a method for operating a switch valve (4) which opens and closes a fluid line (5). The switch valve (4) is actuated by means of a pulse width modulated (PWM) signal. The switch valve (4) is actuated outside of the active operating time of the switch valve using PWM signals with an increasing or decreasing duty cycle. The duty cycle in which the switch valve (4) is opened is determined, and the duty cycle corresponding to the opening time is then used to actuate the switch valve (4) in order to open and close the switch valve during the active operating time of same. In this manner, the switch valve (4) can be actuated in a particularly precise manner.

The invention discloses a double-coil undervoltage tripper. The double-coil undervoltage tripper comprises an EMC filter circuit, a rectifying circuit, a sampling circuit, a PWM circuit, a first switch circuit, a power supply circuit, a comparing circuit, a bolt circuit, a differentiating circuit, a second switch circuit and a double-coil undervoltage electromagnet, wherein the EMC filter circuit is used for bidirectionally inhibiting interference signals generated by a power grid and an internal circuit; the double-coil undervoltage electromagnet comprises a stabilizing winding, a strong starting winding and a movable iron core. According to the double-coil undervoltage tripper, the reliable pull-in when the voltage of the power grid is higher than 85% of rated voltage is guaranteed, and the reliable tripping when the voltage of the power grid is lower than 50% of the rated voltage is guaranteed; by virtue of relatively high power of the strong starting winding and relatively low power of the stabilizing winding, the high-reliability pull-in can be achieved, and the low-power operation is simultaneously considered, so that the heating of the electromagnet is avoided. Besides, after a power supply circuit of the double-coil undervoltage tripper is connected to the second switch circuit in series, the energy efficiency of the circuit is effectively improved when the integral circuit is adequately simplified.

The invention provides an energy-saving rotary two-way balancing valve which is compact in structure and steady to operate and realizes energy conservation and consumption reduction. The energy-saving rotary two-way balancing valve comprises a valve body and a pair of valve spool components, a pair of symmetrical stepped valve cavities are formed in the valve body, a first oil port and a second oil port communicated with the valve cavities are respectively arranged on the end surface of the valve body, each valve cavity comprises a horizontal main hole, a main flow channel and a control flow channel, the first oil port is respectively communicated with the main flow channels and the control flow channels, the control flow channels, the main flow channels and the second oil ports are sequentially communicated with the main holes, the valve spool components are arranged in the main holes, and each valve spool component sequentially comprises an orifice plug, a valve rod, a spring, a valve seat, a spring seat, a pressure adjusting spring and a valve sleeve. By the aid of the hydraulic negative feedback principle, two sets of sequence valves and one-way valves with negative feedback are arranged in the valve body, so that a main engine can steadily work, and the balancing valve can function in saving energy and reducing consumption.

The invention relates to an air inlet valve of screw air compressor, which comprises an inlet, a chamber and an outlet mounted on the frame. Wherein, the chamber contains one round disc whose circumference is uniformly distributed with several vent holes; the center of disc has a cylinder; the upright part of T-shaped movable door cover is hollow that contains spring; the upright part is inserted into the cylinder; the area of door cover is larger than the inlet; the frame, round disc and cylinder are integrated to form a valve. The invention is simple with low cost and low failure rate.

Device for cool drying a gas that consists of a closed cooling circuit (2) with a compressor (3), and which further in the direction of flow (M) of the coolant successively contains a condenser (5), an expansion means (7) followed by an evaporator (8), that constitutes the primary part of a heat exchanger (9) with a secondary part (10) through which the gas to be dried is guided, and whereby there is a bypass pipe (17) in the cooling circuit (2) that can be closed by means of a bypass valve (18) with a valve element (23) and a pressure-sensitive element (30) acting on it that is exposed to a local control pressure in the cooling circuit (2), whereby the control pressure pipe (38) is connected to the closed cooling circuit (2) upstream of the outlet of the evaporator (8).

The invention relates to a control valve (16) for an air spring, comprising a housing (41), an exhaust duct that has an exhaust tappet (26) for opening of closing the exhaust duct, which exhaust tappet interacts with a first control means (19), a ventilation duct that has a ventilation tappet (27) for opening or closing the ventilation duct, which ventilation tappet interacts with a second control means (20), and a supplemental duct having a supplemental tappet (28) for opening or closing the supplemental duct, which supplemental tappet interacts with a third control means (21), wherein a first air connection A connects to the exhaust duct and a second air connection P connects to the exhaust duct together with the supplemental duct, wherein a first control means (19) and a second control means (20) are arranged to one another in such a manner that said control means cannot be actuated at the same time by an control element (18), and wherein the second control means (20) and the third control means (21) are arranged to one another in such a manner that the supplemental duct can only be opened when the ventilation duct is opened. The invention further relates to a motor vehicle seat comprising a mechanical swing system and an air spring, which motor vehicle seat has such a control valve.

The invention discloses a positive and reverse rotation overload unloading valve. The valve comprises a valve body (1), a one-way valve (2), a main valve core (3), an end cover (4), a plug (5), a control valve core (6) and a spring pressure regulating component, wherein an oil discharge duct (7), an oil return duct (8), an oil inlet duct (9) and a reverse oil duct (10) are formed in the valve body (1); the one-way valve (2) is communicated with the oil inlet duct (9) and the oil discharge duct (7); a runner structure used for unloading is arranged on the valve body (1); a first sealing oil cavity (17) is arranged between the control valve core (6) and the plug (5); a first oil duct mechanism is arranged between the oil inlet duct (9) and the first sealing oil cavity (17); a secondary pressure bearing valve core (19) is connected with the valve body (1) in a sliding manner. The valve can realize both positive oil duct high pressure self-control unloading and reverse low pressure control oil discharge duct oil return on one valve body.

The invention relates to a machining and conveying method for a bearing bush of a marine diesel engine. A conveying assembly (2) comprises a first conveying bottom (38) and first conveying output siderollers (37), wherein the input end of the first conveying bottom (38) is used for bearing the bottom of a bearing bush piece (1) which is unfolded to be linear, and the first conveying output side rollers (37) are vertically arranged on the two sides of the first conveying bottom (38) and used for making contact with the side portion of the bearing bush piece (1); the first conveying bottom (38)is provided with first bottom taper pair rollers (39) which are longitudinally distributed and symmetrically arranged; a first bottom center process groove (40) is formed between the first bottom taper pair rollers (39); the bearing bush piece (1) is located in the first bottom center process groove (40); the taper faces of the first bottom taper pair rollers (39) are used for making contact withthe lower edge of the bearing bush piece (1); and a first inner side longitudinal line pressing roller (41) and a first inner side transverse line pressing roller (42) are arranged on one side of thefirst conveying bottom (38). The machining and conveying method is reasonable in design, compact in structure and convenient to use.

A substrate magazine (5) for a substrate insertion system (1), having a frame (7) in which several drawers (10) for receiving in each case at least one flat substrate (13) are arranged one above the other. Each drawer (10) is formed by two guide rails (11), arranged in parallel and at a distance from one another at the same height as that of the frame (7), each with a sliding surface (12) on whicha substrate (13) lying on the edge can be displaced. At least one elastically displaceable latching element (14) is assigned to each drawer (10). In a first, unloaded state, the at least one latchingelement extends at least partially over the sliding surface (12) of one (11) of the guide rails of the drawer (10) and, in a second, elastically deformed state, releases the sliding surface (12).