180results about How to "Reduce the amount of vibration" patented technology

An imaging method and apparatus is described in which distances between a source and an object are changed and projection images are generated at each of the different distances.

A hybrid drive unit includes a hybrid mechanism having at least one electric motor and a transfer that distributes driving force to front and rear wheels. The electric motor and the transfer are housed in a tubular shaped transmission case that extends in the front and rear directions of a vehicle. The hybrid drive unit is mounted on and supported by a second attachment coupled to an internal combustion engine and provided at a front end of the hybrid drive unit and a first attachment portion fixed to a vehicle body. The electric motor and the transfer that are heavy structural members of the hybrid drive unit are positioned separately to the front and rear of the first attachment portion that forms a boundary. By adopting this configuration, it is possible to reduce the amount of engine vibration that is transmitted to the vehicle body through the first attachment portion.

Fluid pump (10) comprises a casing provided with a partition separating a pump chamber and a housing chamber. Impeller (43) is disposed within the pump chamber. Stator (33), semiconductor device (25), terminal (37), and sheet member (29a) are disposed within the housing chamber. Terminal (37) electrically connects the semiconductor device to the stator. Sheet member (29a) may have rubber elasticity. Preferably, the sheet member has s a first plane surface, which makes contact in a planar manner with the semiconductor device, and a second plane surface which makes contact in a planar manner with the partition of the casing.

The invention relates to a lamp which comprises a lamp body and a damping device connected with the lamp body, wherein the damping device comprises a first mounting plate, a second mounting plate, a connecting rod, a first spring and a second spring; the first mounting plate and the second mounting plate are mutually parallel; the connecting rod is provided with a first end part and a second end part which are opposite; the second end part is penetrated into the first mounting plate and fixed on the second mounting plate; the first spring is clamped between the first mounting plate and the first end part of the connecting rod; the second spring is clamped between the first mounting plate and the second mounting plate and sleeved on the connecting rod; the first mounting plate extends along the axial line direction of the connecting rod to form a first sleeve; and the first spring is at least partially accommodated in the first sleeve. By adopting the structure, the lamp has better damping property and longer service life.

A hammer drill comprising: a body 2 in which is mounted a motor 48 and a hammer mechanism 46 which is driven by the motor 48 when the motor 48 is activated; a tool holder 8 mounted on the front of the body 2 and which is capable of holding a cutting tool 12, the hammer mechanism 46, when driven by the motor 48, capable of imparting impacts to the cutting tool 12, when held by the tool holder 8; a rear handle 4, moveably mounted on to the rear of the body 2 via at least one movement control mechanism and which is capable of moving towards or away from the body 2; a biasing mechanism 104 which biases the rear handle 4 away from the body 2; wherein each movement control mechanism comprises: a first mount; a rod 106, having a longitudinal axis 107, rigidly connected at one of it ends to the first mount; a second mount which slidingly engages with the rod 106 at two distinct points only along its length to allow the rod 106 to slide relative to the second mount in a direction parallel to the longitudinal axis 107 whilst preventing the rod 106 from moving relative to second mount in a direction perpendicular to longitudinal axis 107; wherein one mount 70, 133, 136 is attached to the body 2 and the other mount 92 is attached to the rear handle 4.

The invention relates to an assembly welding process for a propeller shaft bracket, and belongs to the technical field of ships. The process comprises the following steps of: before assembling a propeller shaft hub, performing a hydrostatic test of 0.2 MPa; correcting axes and pore diameters of front and rear end faces of the propeller shaft hub and sizes of four points on the left and right sides and upper and lower sides of the propeller shaft hub, and marking temporarily; cutting corresponding position holes on a bottom board and rib board of a ship body, and machining beveled edges of a supporting arm and the propeller shaft hub to perform point welding pre-positioning connection; allowing transverse arms in the horizontal direction to form an included angle alpha of 85 degrees with the supporting arm, splicing the supporting arm and the propeller shaft hub on a moulding bed in advance, and inserting into an open pore of the bottom board of the ship body to perform pre-welding positioning; after the supporting arm and the transverse arms are pre-positioned, welding and positioning the transverse arms and the propeller shaft hub according to a shafting bracing wire; and after welding, performing ultrasonic detection and magnetic particle detection on the propeller shaft bracket. The propeller shaft bracket assembled by the process is small in positional deviation and vibration quantity and low in noise, and the service life of the ships is prolonged greatly.

The invention relates to a machining method for a target material. The machining method for the target material comprises the following processing steps: levelling planes of a sputtering surface and the back face of a target material blank, and processing each side face of the target material blank so that thickness of the target material blank is the same as the predetermined thickness, and plane dimensions of the sputtering surface and back face of the target material blank are the same as the predetermined plane dimensions, wherein the levelling treatment process on the sputtering surface and back face of the target material blank comprises a primary plane levelling process and a secondary plane levelling process which are carried out on the sputtering surface and back face of the target material blank along the first direction and a finish machining plane levelling process carried out on the sputtering surface. By adopting the technical scheme, a multi-step levelling process is carried out on the sputtering surface or back face along the first direction, stress produced inside the target material and vibration produced to the target material by machining in a machining process can be effectively alleviated, so that the defects of deformation and the like can not be formed on the target material blank, quality of a machined target material is improved, and yield of the machined target materials is increased.

The invention discloses a multi-combination independent alcohol-water hydrogen generation fuel cell car. The multi-combination independent alcohol-water hydrogen generation fuel cell car comprises a methanol water storage vessel, at least two groups of methanol water reforming hydrogen generation and power generation modules, a car motor and at least two conveying pumps, wherein the methanol water reforming hydrogen generation and power generation modules are integrated with a reforming device and a fuel cell, a reforming chamber and a hydrogen purifying device are arranged in the reforming device, the temperature in the reforming chamber is 300 to 570 DEG C, methanol and water have the reforming hydrogen generation reaction in the reforming chamber to prepare hydrogen-containing gas, the hydrogen-containing gas is purified by the hydrogen purifying device to obtain hydrogen, and obtained hydrogen is supplied to the fuel cell; the fuel cell is used for generating electric power which is used for powering the car motor; the car motor is used for driving a car axle to rotate so as to enable a car to run. According to the invention, the speed for converting methanol and water raw materials into hydrogen is high, the methanol conversion efficiency is high, the utilization rate of methanol is high, and the hydrogen-containing gas is easy to purify; the reforming device is easy to start, the stability is good, the vibration quantity is small, parameters such as the hydrogen generation temperature are sensitive to control, the safety is high, and the reliability is high.

The invention discloses a controller, a system and a method used for the active control of boom vibration. The controller (100) comprises a signal collecting unit (10), wherein the signal collecting unit (10) is used for collecting the vibration signal of the boom vibration and the attitude signal of the boom attitude and converting the vibration signal and the attitude signal to the vibration data and the attitude data, a boom dynamic property obtaining unit (20) is used for obtaining the boom dynamic property corresponding to the attitude data converted by the signal collecting unit (10), and a vibration controlling unit (30) is used for calculating the controlling signal according to the vibration data and the boom dynamic property, and outputting the controlling signal to the actuating and controlling unit of the boom section. By means of adopting the attitude signal, the device obtains the dynamic property of the boom under the current attitude, combines the vibration signal and figures out the controlling signal to control the actuating and controlling unit of the boom section, thereby achieving the goal of better active vibration reduction.

The invention provides an automatic feeding adjustment module and a method, device and bulk foreign body detection mechanism of the automatic feeding adjustment module. A discharging port of a hopper is located above a conveying belt, and materials are evenly laid on the conveying belt through vibration of a vibrator. A first sensor detects the material level of the materials in the hopper. Rays are emitted from a radiation source to the materials on the conveying belt, and a second sensor collects the rays which penetrate through the conveying belt and the materials. A processor forms a corresponding target image according to the rays collected by the second sensor, in addition, when the material level is not smaller than a first preset material level value, the vibrator is turned on, and data analysis thread is started, wherein the duty ratio R of the target image is calculated, the vibration magnitude of the vibrator is increased if the duty ratio R is smaller than a first preset duty ratio threshold, the vibration magnitude of the vibrator is decreased if the duty ratio R is larger than a second preset duty ratio threshold, or else, the current vibration magnitude of the vibrator is kept unchanged, and the second preset duty ratio threshold is larger than the first preset duty ratio threshold.

The invention relates to a lamp comprising a lamp body and a vibration damper connected with the lamp body. The vibration damper comprises a first installation board, a second installation board, a connecting rod, a spring, a first vibration absorbing sleeve and a second vibration absorbing sleeve, wherein the spring is clamped between the first installation board and the second installation board; a first sleeve barrel for containing the first vibration absorbing sleeve is formed by extending on the first installation board, and a second sleeve barrel for containing the second vibration absorbing sleeve is formed by extending on the second installation board; the connecting rod is provided with opposite first end and second end, the first end of the connecting rod protrudes the first sleeve barrel and limits the first vibration absorbing sleeve in the first sleeve barrel, and the second end of the connecting rod protrudes the second sleeve barrel and limits the second vibration absorbing sleeve in the second sleeve barrel. The lamp has the advantages of better vibration damping performance and longer service life.

The invention discloses a pressure high chord thickness ratio empty box bluff body streaming flow induced vibration test device. An empty box is arranged in a test section water tank, the empty box isof a cuboid, cylinder or irregular structure with openings in the top end and the bottom end, and holes consistent in size and shape are formed in the portion, corresponding to the opening area in the top end of the empty box, of a top plate of the test section water tank; a test measurement part is arranged outside the test section water tank, and comprises a vibration displacement measurement system, a micro pulsating pressure sensor array, a PIV system, a multifunctional dynamic measurement instrument and a synchronous clock; oscillating bar vibration signals obtained by the vibration displacement measurement system and water flow pulsating pressure change signals detected by the micro pulsating pressure sensor array are transmitted to the multifunctional dynamic measuring instrument respectively and recorded, and signals of the multifunctional dynamic measurement instrument and the PIV system are synchronized through the synchronous clock. The device has the advantages of both contact measurement and non-contact measurement, and improves the precision of vibration displacement measurement while not interfering with a flow field.

A damper for a washing machine includes: a cylinder; a piston body having one end inserted into the cylinder; a first friction member interposed in a contact surface between the piston body and the cylinder; an extension bar extended from an inserted portion of the piston body, the extension bar having a circumferential stopper at the extended portion; a friction ring formed between the circumferential stopper and the first friction member; and a second friction member formed on an outer circumferential surface of the friction ring to contact with an inner surface of the cylinder.

The invention discloses a dynamic vibration absorption device for a tumbling-cylinder washing machine, comprising balancing weights and dynamic vibration absorbers, two balancing weights are respectively arranged at left and right sides of the outer drum of the tumbling-cylinder washing machine, two dynamic vibration absorbers for absorbing the vibration of the tumbling-cylinder washing machine are respectively arranged at the balancing weights at left and right sides. The dynamic vibration absorbers are used for transferring the energy of a vibration system and absorbing the vibration of the tumbling-cylinder washing machine. The dynamic vibration absorber comprises a vibrator, springs, an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are arranged on the balancing weights, both ends of the vibrator are provided with springs, the vibrator is mounted on the upper cover plate and the lower cover plate via the springs arranged at the two ends. The invention is in no need of the balancing weights with large mass, can effectively control the vibration amount of the entire drum and absorb the vibration of the washing machine. The invention is adapted to a variety of tumbling-cylinder washing machines.

A down hole vibration dampener is disclosed that uses a set of polyurethane rings and steel support rings to create a shock absorber within the drill string to reduce the amount of vibration in the drill string. A splined mandrel extends longitudinally within a hollow cylindrical housing. A seal structure present between the exterior of the mandrel and the interior of the housing forms a lubricant receiving chamber. The series of polyurethane and steel rings are located in the lubricant chamber and are compressible longitudinally to absorb vibration and shock loads.

A vibrating device has at least one dampening portion. The dampening portion comprises a first tube, a second tube and a layer of resilient material configured so that the first tube is disposed about the second tube, and the layer of resilient material is positioned between the first and second tubes.

The invention provides a machining method of target material. The method comprises the following steps: providing a target blank comprising a sputtering surface, a welding surface opposite to the sputtering surface and a side surface located between the sputtering surface and the welding surface; performing plane machining operation on the sputtering surface of the target blank; and performing side-surface machining operation on the side surface of the target blank, wherein the plane machining operation and the side-surface machining operation both comprise cutting multiple times. During the plane machining operation and the side-surface machining operation, both the plane machining operation and the side-surface machining operation comprise cutting multiple times. The cutting frequency isincreased such that feeding amount and engagement of each cut are correspondingly reduced. Compared with the scheme with fewer cutting frequency, the machining method of target material can reduce cutting force of a tool to the target material during machining so that release of internal stress in the interior of the target material is minimized, thereby reducing the deformation degree of the target material. Additionally, reduction in cutting force can help vibration amount during machining of the target material, which further improves machining quality of the target material.

The invention discloses a method for adjusting the rotating speed of a fan and an electronic device. The method and the electronic device are used for solving the technical problem that the performance of a hard disk is reduced due to the too large quantity of vibration transmitted by the fan to the hard disk. The method includes the steps that the current vibration frequency of the fan in the electronic device is obtained; whether the current vibration frequency is consistent with the sensitive frequency of the hard disk in the electronic device or not is judged; the sensitive frequency of the hard disk is the frequency for the hard disk to generate resonance; and if the current vibration frequency is consistent with the sensitive frequency, the rotating speed of the fan is adjusted, and the vibration frequency of the fan is not consistent with the sensitive frequency after adjustment.