108results about How to "Realize the effect of vibration reduction and noise reduction" patented technology

The invention provides a vapor-liquid two-phase flow tube shell type heat exchanger. The heat exchanger comprises a shell, wherein sealing heads are arranged at two ends of the shell respectively; tube plates are arranged in connection positions between the sealing heads and the shell; heat exchange tubes are connected with the tube plates at two ends; vapor phase in vapor-liquid two-phase flow can be condensed into liquid phase in the heat exchange process; the vapor-liquid two-phase flow flows in a tube process; separation devices used for decreasing vibration and reducing noise are arranged in the heat exchange tubes; a plurality of separation devices are arranged in the same heat exchange tube; the length of the separation devices is gradually reduced along the flowing direction of flow in the heat exchange tubes. According to the vapor-liquid two-phase flow tube shell type heat exchanger, the vibration of the tubes can be decreased to a maximum extent due to the length change of the separation devices when the vapor-liquid two-phase flow flows in the tubes; the noise level is reduced; meanwhile, the flowing resistance is reduced; the heat exchange uniformity is improved.

The invention provides a damping steam boiler. The damping steam boiler comprises an upper boiler barrel, a lower boiler barrel, rising pipes and falling pipes, wherein the rising pipes and the falling pipes are connected between the upper boiler barrel and the lower boiler barrel. The rising pipes are internally provided with flow stabilizers, and the multiple flow stabilizers are arranged in the same rising pipe; and the space between every two adjacent flow stabilizers is constantly reduced in the fluid flowing direction of the rising pipes. According to the damping steam boiler, through gap changing of the flow stabilizers, when steam-liquid two phase flowing exists in the rising pipes, heat transmission is reinforced; and meanwhile, vibration of the rising pipes is weakened, and the noise level is reduced.

The invention provides a steam boiler which comprises an upper boiler barrel, a lower boiler barrel, ascending pipes and descending pipes; the ascending pipes and the descending pipes are connected between the upper boiler barrel and the lower boiler barrel; flow stabilization devices are arranged in the ascending pipes; each flow stabilization device comprises a core body and a shell; the core bodies are arranged in the shells; the shells are connected with and fixed to the inner walls of the ascending pipes; each core body comprises a plurality of radial rods extending from the center of thecore body to the radial directions; a plurality of fins extending from the radial rod down are arranged on each radial rod; the fins are provided with sharp parts; and the sharp parts face downwards.With the adoption of the novel structure steam boiler with the flow stabilization devices, when gas-liquid two-phase flowing exists in the ascending pipes, heat transfer is improved, vibration of theascending pipes is weakened, and the level of noise is lowered.

The invention provides a steam boiler which comprises an upper boiler barrel, a lower boiler barrel, ascending pipes and descending pipes; the ascending pipes and the descending pipes are connected between the upper boiler barrel and the lower boiler barrel; flow stabilization devices are arranged in the ascending pipes; each flow stabilization device comprises a core body axially arranged the center of the corresponding ascending pipe and a plurality of radial rods extending along the center rod to the radial directions; a plurality of fins extending from the radial rod downwards are arrangedon each radial rod; the fins are provided with sharp parts; and the sharp parts face downwards. With the adoption of the novel structure steam boiler with the flow stabilization devices, when gas-liquid two-phase flowing exists in the ascending pipes, heat transfer is improved, vibration of the ascending pipes is weakened, and the level of noise is lowered.

The invention discloses a vehicle window air pressure sealing system. The system comprises an assembly positioning lip side, air pressure hoses, a loop interface, a three-position three-way solenoid directional valve, a decompression valve, an air pump, a filter, an air pressure sensor, a vehicle speed sensor and a controller. The assembly positioning lip side is fixedly connected with a vehicle body, and the two air pressure hoses are fixed at the inner and outer sides of vehicle window glass; the two air pressure hoses are communicated through the loop interface and form a gas loop with thethree-position three-way solenoid directional valve, the decompression valve, the air pump and the filter; and the air pressure sensor, the vehicle speed sensor, the controller, the three-position three-way solenoid directional valve and the air pump form a control loop. The vehicle window air pressure sealing system has the advantages that signals of the air pressure sensor and vehicle speed sensor serve as input, the controller controls the three-position three-way solenoid directional valve and the air pump to work, and the internal pressure in the air pressure hoses is adjusted to ensure that the vehicle window glass always fits the air pressure hoses to prevent the noise from being transmitted into a vehicle; the elasticity and damping of the air pressure hoses reduce the vibration ofthe vehicle window glass and have the advantages of vibration and noise reduction.

The invention provides a gas-liquid two-phase flow multitube type tubular heat exchanger. The gas-liquid two-phase flow multitube type tubular heat exchanger comprises a shell. The two ends of the shell are each provided with an end enclosure. The connection position of each end enclosure and the shell is provided with a tube plate. Each heat exchange tube is connected with the tube plates at thetwo ends. A gas phase in gas-liquid two-phase flow is insoluble or indissolvable gas, and in other words, in the heat exchange process, the gas is not dissolved into liquid. The gas-liquid two-phase flow multitube type tubular heat exchanger is characterized in that the heat exchange tubes are internally provided with the flow stabilizing devices used for absorbing shock and reducing noise; each heat exchange tube is internally provided with the multiple flow stabilizing devices; and the lengths of the flow stabilizing devices are reduced to a certain position gradually in the flowing direction of fluid inside the heat exchange tubes in the first place, and then the lengths of the flow stabilizing devices are gradually increased from the certain position. According to the gas-liquid two-phase flow multitube type tubular heat exchanger, the lengths of the flow stabilizing devices are variable; when the gas-liquid two-phase flow exists in a pipe, vibration of the pipe is weakened to a greatest extent, and the noise level is lowered; and meanwhile, flow resistance is reduced.

The invention provides a liquid-vapor two-phase flow tubular shell type heat exchanger. The heat exchanger comprises a shell, wherein the two ends of the shell are separately provided with end sockets, tube plates are arranged at the connecting positions of the end sockets and the shell, and heat exchange pipes are connected with the tube plates at the two ends; a vapor phase in liquid-vapor two-phase flow can be condensed into a liquid phase in the heat exchange process, and the liquid-vapor two-phase flow flows in a tube pass; and flow stabilizing devices used for reducing vibration and noise are arranged in the heat exchange pipes, a plurality of flow stabilizing devices are arranged in the same heat exchange pipe, and the length of the flow stabilizing devices is gradually reduced in the flowing direction of fluid in the heat exchange pipes. According to the heat exchanger provided by the invention, through the length variation of the flow stabilizing devices, when the liquid-vaportwo-phase flow occurs in the pipeline, the vibration of the pipeline is reduced to an utmost degree, and the noise level is reduced; and at the same time, flow resistance is reduced, and the heat exchange uniformity is improved.

The invention provides a design method for a steam boiler. The steam boiler comprises an upper boiler cylinder, a lower boiler cylinder, an ascending pipe and a descending pipe, wherein the ascending pipe and the descending pipe are connected between the upper boiler cylinder and the lower boiler cylinder, and flow stabilizing devices are arranged in the ascending pipe. The design method comprises the following step that along with the increase of the pipe diameter of the ascending pipe, the distance between the adjacent flow stabilizing devices is continuously reduced. According to the provided design method for the steam boiler with the flow stabilizing devices with novel structures, the boiler which is designed by using the method has the advantages that when the steam and liquid two phases flow in the ascending pipe, the heat transfer is enhanced, meanwhile, the vibration of the ascending pipe is weakened, and the noise level is reduced.

The invention discloses a splicing type vibration-damping lead wooden frame used in an oil-immersed transformer, which comprises cross beams fixed on an upper transformer clamping plate and a lower transformer clamping plate and a longitudinal beam used for fixing the lead, wherein the two ends of the longitudinal beam are respectively connected with the two cross beams through tenon and an mortise structures. A certain gap is arranged between the tenon and the mortise in the mortise and mortise structure, and the gap is filled with an elastic sealing glue after curing. Through the non-rigid connection of the tenon and mortise structure, the vibration of the transformer can be buffered, and the effect of damping and noise reduction is realized on the basis of meeting the lead supporting function.

The invention discloses a noise-reduction train wheel. The noise-reduction train wheel comprises a disc wheel (1), a rim (2) and a hub (3) and is structurally characterized in that a circular noise shielding plate (4) is fixed to each of two sides of the disc wheel (1) through bolts (6), the outer ring edge of the noise shielding plate (4) is contacted with the rim (2) of the wheel, and the inner ring edge is contacted with the hub (3) of the wheel. The wheel can inhibit noise reduction, hinder noise transmission, and is good in noise reduction effect and easy to mount; the main body shape of the wheel is not changed, and the wheel is easy to popularize and implement.

The invention discloses a method for reducing NVH of a motor, and a new energy automobile motor. The method comprises the following steps: step 1, heating a rotor iron core of the motor to a preset temperature; step 2, coating the excircle surface of the rotor iron core with an insulating paint; and step 3, drying the insulating paint on the rotor iron core to make the rotor iron core sheets firmly bonded, thereby reducing gaps among the rotor iron core sheets, improving the rigidity of the rotor iron core, and reducing the NVH of the motor. According to the invention, the outer circle surface of the rotor core is coated with a layer of the insulating paint, so that the rotor core sheets are firmly bonded, the rigidity of the rotor core is improved, the bending degree of the rotor when the motor generates resonance is reduced, the extra electromagnetic noise generated during resonance is reduced, the NVH of the motor is effectively reduced, the vibration and noise reduction effect can be achieved without additional hardware, and the cost is low.

A design method of a loop heat pipe comprises an evaporating portion, a condensing portion, a heat insulating portion and a backflow portion, wherein the heat insulating portion and the backflow portion are connected with the evaporating portion and the condensing portion; fluid absorbs heat and evaporates in the evaporating potion, and enters the condensing portion through the heat insulating portion; after exchanging heat in the condensing portion, the fluid is condensed; the condensed fluid returns to an evaporating header through a backflow pipe; the condensing portion comprises a plurality of condensing pipes which are of a parallel structure in parallel connection; the distance between adjacent separating devices is S1, and the side length of a square is L1; each condensing pipe is asquare cross section; the side length of each condensing pipe is L2; and the interval between the centers of adjacent cooling pipes is S2. The design method for the condensing pipe interval of the loop heat pipe is put forwards, heat transfer is strengthened, meanwhile vibration of heat absorbing pipes is weakened, and the noise level is lowered.