31results about How to "Reduce loud noise" patented technology

The invention discloses a fixing base of a blower. The fixing base comprises a bottom plate, a fixing cover, electric telescopic rods and universal wheels, wherein a storage battery is installed in the bottom plate; a first sliding groove is formed in the position, at one side of the storage battery, in the bottom plate; a first sliding block is installed in the first sliding groove; and support disks are arranged at the four corners of the bottom of the bottom plate. According to the fixing base, a mounting base is mounted at one side of the top of a shock absorbing plate through four supportrods; support plates are mounted at two sides of the bottom of the mounting base; two screw rods are uniformly installed between the two support plates; a third sliding block is installed on each screw rod; a second sliding groove is formed in the mounting base above each screw rod; a second sliding block is installed in each second sliding groove; a first L-shaped plate is installed at one sideof the top of the mounting base; a second L-shaped plate is installed at one side of each second sliding block; and one end of each second L-shaped plate extends to be connected with the top of the corresponding third sliding block. Therefore, the blower is convenient to install and remove, and use is convenient.

The invention discloses a structure of a transverse beating stick of a buffer type press. Square holes are symmetrically arranged at two ends of a beating stick body; elastic rubber blocks with proper size are filled in the square holes; and buffer blocks are arranged in the square holes at the upper parts of the elastic rubber blocks and are fixed in the square holes by screws through buffer block fixing flanges.

A method for solving the noise of steam and water mixing valve and steam explosion. The invention is applied to a low-temperature heating kettle system. The low-temperature heating kettle system includes a heating kettle and a temperature-adjusting water-vapor mixing valve. The mixing valve is referred to as a mixing valve. The heating kettle is provided with an interlayer. The temperature-adjusting water-steam mixing valve is provided with a cold water inlet and a steam inlet. The temperature-adjusting water-steam mixing valve and the heating kettle are connected by pipelines. The cold water inlet is connected with a cold water pipe and a steam inlet. A steam pipe is connected, and valves are provided on the cold water pipe and the steam pipe; the temperature-adjusting water-steam mixing valve is controlled and connected with a control system; the invention completely solves the problem that the steam directly enters the interlayer of the low-temperature heating kettle through the mixing valve, and also completely solves the system Strong vibration and loud noise caused by operation.

The invention discloses a pulse negative pressure drilling vibrating screen, belonging to the technical field of petroleum drilling solid phase control, which comprises: a base, a screening device, a negative pressure device, a pulse distributor and a liquid discharge device; the screening device includes a The first sieve, the second sieve, and the third sieve are arranged in sequence in the direction to the entrance, and the bottoms of the first sieve and the second sieve are respectively communicated with the first vacuum plate and the second vacuum plate; the negative pressure device is set On the base, the pulse dispenser communicates with the negative pressure device, the first vacuum plate and the second vacuum plate respectively. When working, the pulse dispenser forms a pulsed negative pressure on the first vacuum plate and the second vacuum plate; the liquid discharge device communicate with the first vacuum disk and the second vacuum disk respectively. The invention uses the pulse dispenser to alternately generate negative pressure inside the first vacuum plate and the second vacuum plate, reduces the screening of critical particles, improves the recovery efficiency of drilling fluid, and at the same time fully exerts the working capacity of the negative pressure device to realize High peak negative pressure under the screen.

The invention relates to the technical field of textiles, and discloses a water-permeable textile roller that eliminates static electricity based on the principle of force. Spring, the outer layer of the roller is provided with an axis block, the outer side of the axis block is movably connected with a connecting spring, and the end of the connecting spring far away from the axis block is movably connected with a buffer rod, and the inside of the outer layer of the roller is provided with a surface center shaft . The water-permeable textile roller based on the principle of force to eliminate static electricity is provided with a connecting spring and a buffer rod inside the outer layer of the roller. The buffer rod is a flexible rod body connected together by a connecting spring, and the outer layer of the roller is under severe pressure. During friction, the buffer rod is bent through the connecting spring to buffer between the outer layer of the roller and the textile, reducing the loud noise caused by violent rotational friction.

The invention discloses a self-balancing fan device. The self-balancing fan device is characterized by comprising a frame, a base, a connecting assembly and a fan. The machine frame comprises three to eight groups of stand column assemblies, every group of stand column assembly comprises a stand column which is vertically arranged along the axis of the group of stand column assembly, and the groups of the stand column assemblies are distributed in the axis of the rotation axis of an impeller in a regular polygonal shape. The base comprises square tubes which are identical to the stand column assemblies in number, the square tubes are fixedly welded end to end to form a polygonal mounting rack corresponding to the regular polygon of the stand column assemblies; connecting assemblies are identical to the stand column assemblies in number. The base is suspended on the frame through the connecting assemblies and detachably, elastic-adjustably and fixedly connected with the frame. The fan comprises a housing, the impeller, a motor and a transmission assembly and is fixedly arranged on the base through the housing, and the housing is provided with an air inlet and an air outlet.

The invention discloses a mounting frame. The mounting frame is structurally characterized by comprising a main frame body, a hanging frame and connecting components, the main frame body comprises 3-8 sets of upright components, each upright component comprises an upright and a connecting frame, the hanging frame is a frame formed by mutually welding square pipes, H-section steel or channel steel and with a shape corresponding to a regular polygon or a rectangle formed by sequentially connecting projection of each upright, the number of the connecting components is identical with that of the upright components, each connecting component comprises a bolt, a spherical washer, a spherical washer supporting block, a lower compression spring, a first spring seat, a second spring seat, an upper compression spring and a fixing nut, and the hanging frame is arranged on the main frame body in a hung manner through the connecting components and is in demountable, elastically-adjustable and fixed connection with the main frame body.

The invention relates to a full-automatic hydraulic stone splitting device, and belongs to the technical field of hydraulic devices, and provides a full-automatic hydraulic stone splitting device. The fully-automatic hydraulic stone splitting device has the advantages that the structure is simple, and the convenience in use is realized; by adopting the electrical-mechanical-hydraulic integral design, the time is shortened, the labor intensity is decreased, and the working efficiency is high. The full-automatic hydraulic stone splitting device adopts the technical scheme that the full-automatic hydraulic stone splitting device consists of a stone splitting expander and a stone splitting hydraulic cylinder, wherein a drilling part mainly consists of a hydraulic motor, an impact drill bit and a drilling hydraulic cylinder; the impact drill bit is arranged on the hydraulic motor, and the drilling hydraulic cylinder is used for driving the impact drill bit to move up and down; the stone splitting hydraulic cylinder and the drilling hydraulic cylinder are connected with a main oil pipeline through low-pressure relief valves; the stone splitting expander and the hydraulic motor are connected with the main oil pipeline through high-pressure relief valves; a main overflow valve is arranged on the main oil pipeline, and throttling valves are respectively arranged on oil inlet pipes of the stone splitting hydraulic cylinder, the drilling hydraulic cylinder, a stone splitting arm and the hydraulic motor; electromagnetic reversing valves are respectively arranged on oil inlet and outlet pipelines. The full-automatic hydraulic stone splitting device is widely applied to stone splitting.

The invention provides a control system for a vehicle. The control system for the vehicle comprises an acquiring module, a judging module and a control module. The acquiring module is used for acquiring the rotating speed N of the output end of an engine and the rotating speed N_FTC of the input end of a gearbox in the current sampling period, and acquiring the rotating speed N_old of the output end of the engine and the rotating speed N_FTC_old of the input end of the gearbox in the previous sampling period. The judging module is used for comparing the rotating speed N with the rotating speed N_FTC, and comparing the rotating speed N_old with the rotating speed N_FTC_old. The control module is used for controlling the required torque of the engine to be the preset limited torque when the rotating speed N_old is smaller than or equal to the rotating speed N_FTC_old and the rotating speed N is larger than the rotating speed N_FTC, and controlling the required torque of the engine to gradually rise to the target torque within the first preset time. The control system for the vehicle has the advantages of being capable of effectively lowering the impact noise of a power drive chain of the engine and improving the riding comfort. The invention further provides a control method for the vehicle and the vehicle.