52results about How to "Stable damping force" patented technology

The invention relates to a damper of a washing machine which produces a large damping force for low-frequency vibration while small damping force for high-frequency vibration. A piston (3) coupled with a piston rod (4) is embedded inside a cylinder which is filled with mixed oil liquid and gas, and the piston (3) is infused in the oil liquid. No free piston and other isolators are arranged at the borderline of the oil liquid and gas inside the cylinder (2). The piston (3) is provided with a throttle path (7) communicated with two chambers (2A and 2B). The cylinder (2) is connected with one side of a water tank holding the cylinder, while the piston rod (4) is connected with one side of the shell. For low-frequency vibration during the washing and rinsing process, a large damping force is generated through the resistance of the oil liquid flowing through the throttle path (7) so as to restrain the shaking of the cylinder; while for the high-frequency vibration during the dehydrating process, inflated air is generated actively to reduce the damping force and to absorb the vibration of the cylinder so as to reduce the vibration and noise.

An object of the present invention is to generate a stable damping force and enhance durability of a main valve in a hydraulic shock absorber in which valve opening of the main valve is controlled by an inner pressure of a backpressure chamber. A first piston 3 and a second piston 4 coupled to a piston rod 10 are fitted in a cylinder 2 such that a piston chamber 2C is defined between the first and second pistons 3, 4. An extension-side main valve 18 and a compression-side main valve 23 are provided in the piston chamber 2C. Valve opening of the main valves is controlled by an extension-side backpressure chamber 19 and a compression-side backpressure chamber 24. A compression-side check valve 13 and an extension-side check valve 16 are provided at the first piston 3 and the second piston 4. During an extension stroke of the piston rod 10, the compression-side check valve 13 is closed, whereby action of a pressure of a cylinder upper chamber 2A on the compression-side main valve 23 is prevented. During a compression stroke of the piston rod 10, the extension-side check valve 16 is closed, whereby action of a pressure of a cylinder lower chamber 2B on the extension-side main valve 18 is prevented. Accordingly, it is possible to generate a stable damping force, and enhance durability of the extension-side main valve 18 and the compression-side main valve 23.

The flow of hydraulic fluid induced by sliding movement of a piston in a cylinder is controlled by a pilot-type main valve and a pilot valve to generate damping force. The valve opening of the main valve is controlled by adjusting the pressure in a pilot chamber through the pilot valve. A volume compensating chamber is defined by a flexible disk member so as to face the pilot chamber. The volume compensating chamber is communicated with a reservoir through communicating passages. When the disk valve opens, the volumetric capacity of the pilot chamber reduces. At this time, the flexible disk member deflects toward the volume compensating chamber, thereby suppressing an excessive rise in pressure in the pilot chamber and preventing an unstable operation of the pilot valve and the main valve to obtain a stable damping force.

A first piston and a second piston coupled to a piston rod are fitted in a cylinder, and an intermediate chamber is formed between the first and second pistons. A compression-side check valve and an extension-side check valve are provided at the first piston and the second piston. An extension-side main valve and a compression-side main valve are disposed in the intermediate chamber. A downstream side of a damping force adjusting valve is connected to the intermediate chamber. Inner pressures of an extension-side backpressure chamber and a compression-side backpressure chamber are adjusted by the damping force adjusting valve, whereby valve opening of the extension-side and compression-side main valves is controlled. Hydraulic fluid of the downstream side of the damping force adjusting valve is first sent into the intermediate chamber, and then is sent to a cylinder upper chamber or a cylinder lower chamber. Due to this arrangement, it is possible to prevent a sudden drastic change in a hydraulic fluid pressure and thereby to generate a stable damping force.

The flow of hydraulic fluid induced by sliding movement of a piston in a cylinder is controlled by a pilot-type main valve and a pilot valve to generate damping force. The valve opening of the main valve is controlled by adjusting the pressure in a pilot chamber through the pilot valve. A volume compensating chamber is defined by a flexible disk member so as to face the pilot chamber. The volume compensating chamber is communicated with a reservoir through communicating passages. When the disk valve opens, the volumetric capacity of the pilot chamber reduces. At this time, the flexible disk member deflects toward the volume compensating chamber, thereby suppressing an excessive rise in pressure in the pilot chamber and preventing an unstable operation of the pilot valve and the main valve to obtain a stable damping force.

A first piston and a second piston coupled to a piston rod are fitted in a cylinder, and an intermediate chamber is formed between the first and second pistons. A compression-side check valve and an extension-side check valve are provided at the first piston and the second piston. An extension-side main valve and a compression-side main valve are disposed in the intermediate chamber. A downstream side of a damping force adjusting valve is connected to the intermediate chamber. Inner pressures of an extension-side backpressure chamber and a compression-side backpressure chamber are adjusted by the damping force adjusting valve, whereby valve opening of the extension-side and compression-side main valves is controlled. Hydraulic fluid of the downstream side of the damping force adjusting valve is first sent into the intermediate chamber, and then is sent to a cylinder upper chamber or a cylinder lower chamber. Due to this arrangement, it is possible to prevent a sudden drastic change in a hydraulic fluid pressure and thereby to generate a stable damping force.

The invention discloses a neck muscle training apparatus, aiming at solving the problem that an existing neck muscle training apparatus is poor in training effect. The neck muscle training apparatus comprises a stand, and further comprises a master control system, wherein the stand comprises a pedestal, a vertical pillar which is fixedly arranged on the pedestal and a suspension arm which is fixedly arranged at the upper end of the vertical pillar; head driving equipment is arranged on the suspension arm; the head driving equipment comprises a head fixator, at least one swinging rod, a fixed seat which is connected to the suspension arm and a damping unit which is arranged on the fixed seat; the damping unit comprises a magnetic damping motor which can output a damping torque and a torque transmission mechanism which is connected to the magnetic damping motor and is used for transmitting the damping torque; the swinging rod comprises a swinging end and a rotating end; the rotating end of the swinging rod is connected to an output end of the torque transmission mechanism by virtue of a transmission shaft and the swinging rod is capable of swinging round the axis of the transmission shaft; the swinging end of the swinging rod is connected to the head fixator; the master control system comprises a CPU module and a control circuit; an input end of the control circuit is electrically connected to the CPU module; and an output end of the control circuit is electrically connected to the magnetic damping motor.

The invention provides a damper for a pantograph. The damper comprises an oil storage cylinder, an oil cylinder, a guide, a piston rod, a piston, hydraulic oil and a bottom valve seat, wherein a plurality of throttling holes are formed in the piston rod; one end of each throttling hole communicates with a through oil hole; the other end of each throttling hole is designed as an opening which facesthe exterior of the piston rod; the opening of each throttling hole can be exposed to the interior of a cavity I and / or is covered by the guide; at least two throttling holes are distributed at different positions along the axial direction of the piston rod; and a gasket is arranged between the inner end along the axial direction of the oil cylinder and the bottom valve seat, and used for adjusting the maximum tensile damping force in the outward tensile stroke of the piston rod. According to the damper provided by the invention, a conventional structure for adjusting the maximum tensile damping force through a nut, a spring and a valve plate is canceled and changed to a structure for adjusting the maximum tensile damping force by additionally mounting gaskets of different thicknesses. The damper is simple and feasible, and convenient to maintain.

In a tensioner (100)having a ratchet mechanism composed of annular teeth (122) on a plunger (120) and an expansible resilient ring (130)disposed in a groove (116)formed in the inner peripheral surface of a plunger-accommodating hole (111)in a tensioner housing, the rear surfaces of the annular teeth have a steep slope (122b), and the front surfaces of the annular teeth (122)have a gradual slope with a convex curvature such that the rate of change of the slope decreases proceeding in the direction of retraction of the plunger (120).

The invention relates to an electromagnetic damper. The electromagnetic damper is used for an airplane telex accelerator platform and has reliable and stable system damping force under a telex manipulative mode. When the telex manipulative mode is adopted by the airplane accelerator platform, the load of a steel rope, an engine main pump and other links is eliminated, therefore, a damping system must be added to the telex accelerator platform and is connected to a revolving point of a transmission periodic line in parallel for replacing the load, it is ensured that a pilot can still normally push and pull a handle of the accelerator platform according to the original manipulative force, and the size of an engine throttle is controlled. The electromagnetic damper is characterized by being small in size, convenient to install and stable in damping force, moreover, the damping force can be adjusted externally, and the requirement for using of the accelerator platform is met.

The invention relates to a long-stroke plate-type lead shearing damper, belonging to the technical field of engineering vibration reduction. The long-stroke plate-type lead shearing damper comprises cover plates, a sliding plate, a side baffle plate and baffle plates, wherein the two cover plates are arranged in opposite up and down on the sliding plate; the side baffle plate is arranged between the two cover plates and abuts against the two sides of the sliding plate; the two baffle plates are welded on the cover plates along a length direction; two grooves are arranged in the center of the sliding plate; the cover plates, the sliding plate, the side baffle plate and the baffle plates are fixed by bolts to form two cavities; a regulus lead formed by injecting lead of a molten state into the cavities from a lead-pouring hole and solidifying the lead is arranged in the cavities; and when reciprocating, the sliding plate consumes energy by using shearing regulus lead in the grooves. The invention is suitable for thin layers of industrial and civil buildings, pier top sliding supports of bridge structures and the like. The invention has the advantages of long stroke, stable output power, huge energy consumption, simple structure and convenience of installation and regulation.

The invention provides a pantograph which comprises a damper, a bottom frame, a pantograph lifting device and the like. The damper comprises an oil storage cylinder, an oil cylinder, a guide, a pistonrod, a piston, hydraulic oil and a bottom valve seat, a plurality of throttling holes are formed in the piston rod, one end of each throttling hole is connected with an oil through hole, the other end of each throttling hole is an opening facing outside the piston rod, openings of the throttling holes can be exposed in an I cavity and / or covered by the guide, at least two throttling holes are distributed at different axial positions of the piston rod, and spacers are arranged between an inner axial end of the oil cylinder and the bottom valve seat and used for adjusting stretching maximum damping force in the outward stretching stroke of the piston rod. The pantograph cancels the mode that the stretching maximum damping force is adjusted by a nut, a spring and a valve plate in the prior art, and the stretching maximum damping force is adjusted by additionally mounting the spacers with different depths. The pantograph can effectively meet requirements of use conditions of the pantograph and is simple, easy and convenient to maintain.

A damper for a washing machine generates a large damping force for low-frequency vibrations and a small damping force for high-frequency vibrations. A piston (3) connected with a piston rod (4) is embedded in a cylinder (2) in which oil and gas are mixed and sealed, so that the piston (3) is immersed in the oil. No separator such as a free piston is arranged at the boundary between the oil liquid and the gas in the cylinder (2). A throttling passage (7) communicating between the upper and lower chambers (2A, 2B) of the cylinder is provided on the piston (3). The cylinder barrel (2) is connected to one side of the water tank containing the drum, and the piston rod (4) is connected to one side of the housing. For the low-frequency vibration during the washing and rinsing process, the resistance of the oil flowing through the throttling passage (7) is used to generate a large damping force to suppress the shaking of the drum; for the high-frequency vibration during the dehydration process, by actively generating Inflation reduces damping force and absorbs drum vibration, thereby reducing vibration and noise generation.

A damper device provided with a single cylinder type erecting structure having a free piston includes: a partition wall fixed to the cylinder between a piston and the free piston and partitioning inside of the cylinder into spaces in an axial direction of the cylinder; a partition wall orifice composed of an orifice piercing through the partition wall; a piston orifice composed of an orifice piercing through the piston; a partition wall-side flow variable structure configured to regulate a flow rate of a viscous fluid passing through the partition wall orifice; a piston-side flow variable structure configured to regulate a flow rate of the viscous fluid passing through the piston orifice; and a control unit configured to control the partition wall-side flow variable structure and the piston-side flow variable structure.

The invention provides a limiting reset high-seismic-mitigation friction type combined support, and belongs to the field of building structure vibration control. The combined support is formed by combining two movable tensile and compression devices and a fixed mounting sleeve. According to the combined support, when the movable tensile and compression devices and the fixed mounting sleeve move ina reciprocating motion to generate tensile and compression friction, a friction energy dissipation outer plate is driven to realize dissipate energy by adopting the friction tensile and compression energy dissipation plates, a matrix and an energy dissipation material extrude and rub each other so as to effectively improve the energy dissipation effect,a friction-resistant layer is large in friction coefficient, the friction tensile and compression energy dissipation plates overcomes friction to apply work, the friction-resistant layer rubs to realize energy dissipation, so that the energy dissipation efficiency is improved, moreover, the overall safety performance is greatly improved under the cooperation of limiting holes and limiting baffles, an SMA regulating limiting reset wire is arranged, so that the whole can be automatically reset after the load disappears, strong impact load can be dissipated, meanwhile, a stable damping force and an automatic reset function can be providedfor the whole in the tensile and compression direction, a combined structure of limiting reset protection is adopted, so that the overall safety performance is improved, and meanwhile, multiple energydissipation and seismic mitigation effects are achieved.

The invention provides an assembly type crash barrier connection system for a sharp turn, belonging to the field of road traffic facilities. A plurality of stand columns are arranged outside the sharpturn, two crooked connection handrails are arranged between two stand columns in the middle, a plurality of rotational energy consumption barrels are arranged between the two crooked connection handrails, two ends of the crooked connection handrails and the stand columns are connected and fixed, a plurality of connective fixing rods are arranged on the crooked connection handrails, outer barrelsand inner barrels are arranged in the rotational energy consumption barrels, rubber energy consumption layers are arranged between the outer barrels and the inner barrels, the internal spaces of the inner barrels are hollow areas, two ends of a light-weight energy consumption buffer guardrail plate and the stand columns are connected and fixed by connecting pieces, and a transitional connection rubber column is arranged between the light-weight energy consumption buffer guardrail plate and the rotational energy consumption barrel which is close to the light-weight energy consumption buffer guardrail plate; the beneficial effect is that the installation and operation of the system are remarkably simplified, the assembly speed is fast, the construction is simple, the construction cost is low, and the industrialized disassembly is quite convenient.

The invention belongs to the field of control over vibration of building structures, and particularly relates to a resettable large-deformation damper. The resettable large-deformation damper is defined by an upper plate, a lower plate, external curved energy-dissipation steel plates and an end plate, wherein the energy-dissipation way that the upper and lower plates tense and compress the external curved energy-dissipation steel plates, energy-dissipation soft partition steel plates, arc-shaped energy-dissipation steel plates, energy-dissipation end steel plates and semicircular connecting steel plates is adopted so that energy can be dissipated through self bending deformation, and moreover, all the components can mutually cooperatively rub and squeeze an elastic bonding filling materialand an energy-dissipation foamed aluminum material when relative displacement is generated. Connecting shafts drive energy-dissipation friction blocks and the energy-dissipation foamed aluminum material to be mutually rubbed for energy dissipation, so that the kinetic energy or the elastic potential energy or other energy of the structure is transformed into heat energy and energy in other formsto be dissipated; shape memory alloy wires and the combined energy-dissipation steel plates are cooperatively stressed, the shape memory alloy wires have a deformation recovery ability, so that a stable damping force and an automatic reset function are provided for vibration of the damper in the tension-compression direction, and during an earthquake, and the earthquake responses of a building structure are reduced.

The invention discloses a large-span bridge composite multi-directional wind-resistant and anti-seismic shock absorber and a working method thereof. The large-span bridge composite multi-directional wind-resistant and anti-seismic shock absorber comprises a tubular shell, a steel shaft with the length being larger than that of the tubular shell is arranged in the tubular shell, one end of the steel shaft extends out of the end of the tubular shell, and the other end of the steel shaft is provided with a piston plate clamped in the tubular shell; one end of the tubular shell is of a sealed structure, and the end of the sealed structure is provided with a universal hinge for being connected with a bridge pier; the other end of the tubular shell is provided with a cover plate, and a hole allowing the steel shaft to penetrate through is formed in the center of the cover plate; and three or more sections of damping cavities are formed in the tubular shell in the axis direction of the tubular shell, and are the first damping cavity located between the sealed structure of the tubular shell and the piston plate, the second damping cavity located between the piston plate and an annular partition plate and the third damping cavity located between the annular partition plate and the cover plate correspondingly. The shock absorber has an obvious energy consumption effect on vibration, generated by a bridge, with the high and low frequency and the large and small amplitude values, assembly-type connection is adopted, and dismounting, mounting and maintenance are convenient.

The invention belongs to the field of building structure vibration control, and particularly relates to a double-cylinder type tension-compression energy dissipation damper with a reset function. Thedouble-cylinder type tension-compression energy dissipation damper comprises an upper plate, a lower plate, threaded holes A, threaded holes B, an external semicircle energy dissipation steel plate, an internal semicircle energy dissipation steel plate, a foamed aluminum energy dissipation material, connecting shafts, friction energy dissipation blocks, shape memory alloy and end energy dissipation steel plates. In the double-cylinder type tension-compression energy dissipation damper, a double-cylinder structure is adopted, the cylinder structure defined by the internal semicircle energy dissipation steel plate and the end energy dissipation steel plates is arranged in the cylinder structure defined by the external semicircle energy dissipation steel plate and the end energy dissipation steel plates, and the connecting shafts and the friction energy dissipation blocks are longitudinally symmetrically arranged in the cylinder structure defined by the internal semicircle energy dissipation steel plate and the end energy dissipation steel plates. The shape memory alloy has super strong deformation recovery ability, and stable damping force and the automatic reset function are provided for vibration of the damper in the vertical direction, and during an earthquake, the earthquake responses of a building structure can be reduced.

The invention discloses a combined anti-collision guardrail structure, which belongs to the technical field of road traffic facilities. The combined anti-collision guardrail structure comprises an anti-collision pad, an energy consumption extrusion combined structure, an arc-shaped thin-wall energy consumption steel plate, an energy consumption filling material, a connecting piece, a connecting plate, a connecting fixing rod, a rotating anti-collision barrel, a connecting cross beam, an inner barrel, an anti-collision damping energy consumption material layer, a hollow area, an anti-collisionsoft outer barrel, a vertical connecting fixing pile and an energy consumption extrusion cavity. When the vehicle body collides with the guardrail, the vehicle body can be forced to change the direction, the installation operation is remarkably simplified, the assembly speed is high, the industrialization process is promoted, the anti-collision and shock absorption coordinated energy dissipation capacity is high, the collision force can be fully dissipated, and the anti-collision pad can play a role in buffering and protecting. By means of the energy consumption extrusion combined structure, the energy consumption filling material, the anti-collision damping energy consumption material and the anti-collision soft outer cylinder, damping energy consumption can be conducted, impact force canbe greatly buffered, and the multiple damping effect is achieved.

The invention provides a molybdenum wire winding device and winding equipment, and relates to the technical field of wire cutting. The molybdenum wire winding auxiliary device comprises a molybdenum wire disc and a damping unit. The molybdenum wire disc is connected with one end of a molybdenum wire. The molybdenum wire can be wound on the molybdenum wire disc. The other end of the molybdenum wireis configured to be connected with a molybdenum wire winding unit. The damping unit is disposed on the molybdenum wire disc. The damping unit is configured to control the rotating speed of the molybdenum wire disc so as to control the tension degree of the molybdenum wire between the winding unit and the molybdenum wire disc. The damping unit can provide stable damping force, so that the tensileforce of wire winding can be stable, and the wire cannot be too tight or too loose; and moreover, by means of the molybdenum wire winding device, it can be avoided that wires are overlapped or brokendue to shaking in manual operation during wire winding. In addition, the wire winding and wire tightening can be completed at a time, and there is no need to tightening the wire after winding the wire. Thus, the molybdenum wire winding device can improve the molybdenum wire winding efficiency and better facilitates operation.

A shock absorber includes a cylinder portion, a piston rod portion arranged as a single member, a pair of protruding members protruding from an outer circumferential surface of the piston rod portion, and a piston valve assembly having the piston rod portion passing therethrough. The piston valve assembly includes a piston portion, a valve element, and a threaded portion arranged to extend or contract in an axial direction as a result of rotation of a female thread portion relative to a male thread portion. The piston valve assembly is arranged such that the piston portion and the valve element are retained to the piston rod portion so as not to move with respect to the axial direction of the piston rod portion by a stretching force generated between the pair of protruding members due to extension of the threaded portion.

The invention relates to an electromagnetic damper. The electromagnetic damper is used for an airplane telex accelerator platform and has reliable and stable system damping force under a telex manipulative mode. When the telex manipulative mode is adopted by the airplane accelerator platform, the load of a steel rope, an engine main pump and other links is eliminated, therefore, a damping system must be added to the telex accelerator platform and is connected to a revolving point of a transmission periodic line in parallel for replacing the load, it is ensured that a pilot can still normally push and pull a handle of the accelerator platform according to the original manipulative force, and the size of an engine throttle is controlled. The electromagnetic damper is characterized by being small in size, convenient to install and stable in damping force, moreover, the damping force can be adjusted externally, and the requirement for using of the accelerator platform is met.

The invention relates to an elevator damper, in particular to a rubber spring shear sheet combination type elevator damper with a guide sleeve. A collision head is arranged on a top end of a force guide sleeve, the bottom end of the force guide sleeve is connected with a spring, the spring is arranged on a bottom plate, the guide sleeve is arranged outside the spring, the connection end of the force guide sleeve and the spring extends into the guide sleeve, a fixed part is fixedly arranged on the bottom plate and is arranged on one side of the force guide sleeve, one end of a mild steel damper is connected with one end of an extension end of the force guide sleeve in the guide sleeve, and the other end of the mild steel damper is connected with the fixed part. The rubber spring shear sheet combination type elevator damper with the guide sleeve provided by the invention can provide stable damping force. A core energy consumption part, i.e. a shear sheet can be used in a reciprocating manner and provide stable performance. The guide sleeve part is additionally arranged and can well enable the damper to do ideal set up and down energy consumption motion during the whole collision process, so that the reliability of the damper is increased and the service life of the damper is prolonged.

The invention discloses a hanging rod assembly and a washing machine. The hanging rod assembly comprises a hanging rod and a damping device arranged on the hanging rod; the damping device comprises an upper spring seat, a lower spring seat and a spring; the hanging rod assembly further comprises a damping module; the damping module comprises a damping bar and an upper bracket; the upper bracket, the damping bar and the upper spring seat are sequentially arranged on the hanging rod in a sleeving mode from top to bottom; the bottom end of the hanging rod is connected with the lower spring seat; and the spring is arranged between the upper spring seat and the lower spring seat. According to the invention, the damping bar in friction with the hanging rod is also arranged between the upper spring seat and the upper bracket, so that the hanging rod assembly not only has elastic damping generated by the spring, but also has sliding damping generated by friction between the damping bar and the hanging rod when bearing eccentric force of a washing barrel of the washing machine, and the damping force generated by the hanging rod assembly is more stable.