9results about How to "Low noise" patented technology

The utility model belongs to the technical field of mold surface concrete redundant residual hard block is removed, concretely relates to a concrete hard block removing device. The removing device includes: telescopic arm, the top of telescopic arm is fixed on movable gantry, telescopic arm carries out telescopic motion along the vertical direction, mounting plate, mounting plate is fixed at the bottom of telescopic arm, removing unit, removing unit is provided with a plurality of, a plurality of removing units are side by side and arranged below mounting plate, removing unit at least includes mounting seat and V-shaped board, V-shaped board includes first board and second board, first board is fixed in the lower end of mounting seat, the lower surface of first board is fixed with spade head subassembly, and the second board is fixed with cleaning assembly. In the hard block removing device, a plurality of removing units are arranged, a plurality of removing units are independent of each other and do not interfere with each other, not only improve the removing efficiency of concrete hard block, and be favorable to improving the comprehensive cleaning efficiency of mould.

The application relates to a zero-carbon seawater desalination and salt extraction system, which comprises a wind-solar dual-energy tower, a membrane seawater desalination system, a solar dual-heat disc evaporator and a wind-solar dual-energy sea salt drying system. The wind-solar dual-energy tower comprises a double-bearing truss type wind power generation system and a photovoltaic power generation system, and the wind power generation system and the photovoltaic power generation system are used for providing electric energy. The double-bearing truss type wind power generation system adopts a wind-variable current load and a spring type strong wind variable resistance system. The wind-solar dual-energy sea salt drying system comprises a sunlight room, a drying cloth curtain and a salt collection and water filtration circulation system, which are used for further drying and crystallizing the heated secondary separation and concentration concentrated salt water to form refined sea salt through drying or air drying. The application can realize seawater desalination and refined sea salt extraction all day long by using clean energy, and the clean energy is used for heating three times, so that the energy utilization efficiency is high. The application has no direct operation cost, small land occupation, high efficiency, low initial investment cost and easy scaling.

This invention discloses a cover plate for a drive assembly housing, a drive assembly having the same, and a vehicle. The drive assembly housing includes a lower housing and a cover plate. The lower housing has a mounting opening, and the cover plate closes onto the mounting opening. The cover plate includes a central arched area and a mounting area. The mounting area is an annular structure surrounding the central arched area and is used to contact and connect with the lower housing. The central arched area includes multiple curved panel areas that arch from the periphery towards the center in a direction away from the mounting opening. The electronic control cover plate of this application, by setting the central arched area and the mounting area, can increase the modulus of the electronic control cover plate and increase its natural frequency to a certain extent. This makes the natural frequency of the electronic control cover plate far away from the external excitation vibration frequency caused by the vibration of the drive motor, thereby reducing the resonance between the electronic control cover plate and the drive motor, reducing vibration and noise during drive assembly operation, and reducing resonance fatigue of the drive assembly structure.

The utility model relates to radiator technical field especially is a kind of radiator base with air duct, including lower cover, upper cover, sealing cover, turbine fan and circuit board, sealing cover is provided with air inlet, annular air duct plate and two airflow cavities, one air outlet is set up in the both sides of annular air duct plate, one airflow cavity is communicated with the inner chamber of annular air duct plate via one air outlet, turbine fan is located in annular air duct plate, air inlet is correspondingly set with the air inlet end of turbine fan, the bottom surface of lower cover is set with the through-hole for corresponding intercommunication with air inlet, dust cover is detachably installed at through-hole, upper cover is set with two groups of air outlet groups, two groups of air outlet groups are respectively communicated with two airflow cavities one-to-one, and each group of air outlet group includes multiple air outlets. The structure of the application is simple, the volume is thin and flat, the air volume is large, the heat dissipation effect is good, and the universality is good, can be used for electric game special notebook computer and general notebook computer.

This invention relates to the field of circuit board heat dissipation technology, specifically to a circuit board heat dissipation device and circuit board. The device includes a fan with a sealing cover at the fan's air inlet. The sealing cover has several first air inlets communicating with the fan's air ducts. Each first air inlet is connected to a heat-conducting module via a delivery pipe. Several heat-conducting modules are used to contact different heat-generating areas of the circuit board to achieve heat exchange, and the heat is dissipated through the fan and delivery pipes. Each heat-conducting module includes a primary heat-conducting unit and several secondary heat-conducting units, each unit being interconnected to form a unified chamber. It can conduct heat to multiple heat-generating areas of the circuit board through multiple heat-conducting modules and dissipate heat through a single fan. The fan has low maintenance costs and produces minimal noise and vibration. Each heat-conducting module can be assembled with an appropriate number of heat-conducting units according to the heat generation range to form a heat-conducting module of suitable volume, achieving appropriate heat conduction and dissipation effects.

This invention discloses a microscope stage displacement error calibration method based on Hough transform image analysis. Addressing the stage displacement error of a microscope, multiple images of a common microscope scale are acquired. Hough transform image analysis is used to obtain the horizontal and vertical graduation lines of the scale. Feature analysis and detection are then used to determine the actual center point and the error between the actual center point and the horizontal displacement length and the system settings. Error compensation is then used to achieve precise center positioning and accurate horizontal movement of the stage. This invention eliminates the need for mechanical inspection and manual operation, achieving simple, fast, and stable microscope stage calibration through image analysis.

This invention provides a rotor blade profile for a liquid ring pump, the shape of which is determined by the coordinates of an involute equation, wherein the equation is: , ; where, X The x-axis is... Y The vertical axis represents the blade profile. X , Y A segment of a curve formed by continuous changes; the radius of the outer circle of the impeller hub. D The diameter of the impeller. t Let π be the independent variable and π be the value of a circle. b This is an eccentric quantity. Its range of values ​​is... D The value range is 0.2 to 0.3 times; t The value range is 0 to 1; b The value range of is 0 to 1 times the value range of . This invention has many advantages, such as good overall performance, low working loss, high working efficiency, low vibration, low noise, and low cavitation risk.

The application discloses a nursing bed with a lateral swing space extension function of a guardrail linkage with a turning-over function, and belongs to the field of nursing beds. The nursing bed with a lateral swing space extension function of a guardrail linkage with a turning-over function comprises a bed frame, a mattress support assembly, a turning-over mechanism and a guardrail mechanism. The guardrail mechanism is designed in a parallelogram mechanism, and forms a guardrail which can be swung and unfolded or folded. The turning-over mechanism and the guardrail mechanisms on both sides are connected through a linkage mechanism. When the turning-over mechanism drives the mattress support assembly to move to one side, the guardrail mechanism on the same side is swung and unfolded. When the turning-over mechanism drives the mattress support assembly to move to the other side, the guardrail mechanism on the opposite side remains folded on the side of the bed frame. In this way, the unfolding of the guardrail can realize the space extension of the nursing bed to the turning-over side, increase the space of the turning-over side of the nursing bed, improve the turning-over safety and comfort of the patient, and avoid the secondary injury of the patient during the turning-over process. In addition, the guardrail mechanism and the linkage mechanism are simple, compact, stable and reliable in movement.

The utility model discloses an intelligent bionic fish, and relates to the technical field of bionic fishes. The fish head and the fish tail are connected to the two opposite ends of the fish body respectively. The fish tail is connected with a tail fin; a pectoral fin is arranged at the joint of the fish head and the fish body; the interiors of the fish head, the fish body and the fish tail are sequentially communicated to form a containing cavity, the containing cavity is used for containing the control assembly, the first steering engine and the second steering engine, and the first steering engine and the second steering engine are in signal connection with the control assembly; the first steering engine is in driving connection with the pectoral fin, and the control assembly can drive the pectoral fin to deflect and flap circumferentially through the first steering engine; the second steering engine is in driving connection with the tail fin, and the control assembly can drive the tail fin to deflect and flap circumferentially through the second steering engine; the fish head is provided with an image sensor, and the image sensor is in signal connection with the control assembly and used for obtaining image information and transmitting the image information into the control assembly. The intelligent bionic fish has small disturbance on water, can acquire fish images at a short distance, and improves the reliability and accuracy of image data acquisition.