7results about How to "Reduce vibration risk" patented technology

The application relates to the hair dryer technical field and provides a hair dryer with a rear-mounted temperature controller, which comprises a hair blowing head, a heating assembly and a temperature controller arranged in the hair blowing head; the heating assembly comprises a heating wire support and a hollow heat insulation cover, the first heating wire is wound around the outer periphery of the heating wire support, and the hollow heat insulation cover is arranged on the outer periphery of the first heating wire; the temperature controller is arranged in the hollow heat insulation cover and located at one end of the heating assembly far from an air outlet, and the side of the temperature controller far from the air outlet is provided with the second heating wire; a handle is arranged in the handle and is connected with the hair blowing head in communication, and the air making assembly is used for supplying air to the hair blowing head. According to the application, the temperature controller is arranged at one end of the heating assembly far from the air outlet, and the second heating wire is arranged at the side of the temperature controller far from the air outlet, so that the reaction sensitivity of the temperature controller is ensured, the interference of the temperature controller on the airflow in the hair blowing head is reduced, and the airflow noise is reduced.

The invention discloses an open channel turbulence suppression method and device based on cooperative control of a self-adaptive flow guide grid and an MPC gate. The method comprises the following steps that incoming flow parameters of an open channel are monitored in real time; calculating the Reynolds number of the current water flow state; dynamically adjusting the flow guide angle of a flow guide grid array arranged in the open channel; and dynamically adjusting the opening degree of the gate by adopting a model predictive control algorithm. The device comprises a data acquisition module, a diversion system and a gate execution mechanism. The method has the beneficial effects that through cooperative control of the self-adaptive flow guide grid and the MPC gate, the flow velocity fluctuation rate of the open channel is reduced from + / -5% to + / -2%, the Froude number fluctuation range is compressed from + / -0.15 to + / -0.05, and the water flow stability is remarkably improved. According to the system, the flow guide angle and the gate opening degree can be automatically adjusted according to the incoming flow condition, the problems that a traditional method is poor in adaptability and lags in response are solved, turbulent flow interference is effectively reduced, the flow verification precision is improved, and meanwhile the channel scouring and equipment vibration risks are reduced.

This utility model discloses a high-parameter steam flow guiding structure for a small steam turbine in a million-kilowatt double reheat unit, relating to the field of reheat engine technology. It includes a mounting frame, to which a steam turbine is fixedly connected. A multi-stage flow guiding assembly is provided on the inner wall of the steam delivery pipe of the steam turbine. The multi-stage flow guiding assembly includes a primary plate disposed on the inner wall of the steam delivery pipe. Multiple primary flow guiding holes are opened at the upper end of the primary plate. Through the multi-stage flow guiding assembly, the steam inside the steam delivery pipe of the steam turbine passes sequentially through the primary plate, secondary plate, and tertiary plate. The primary plate initially disperses the high-speed steam, the secondary plate adjusts the flow velocity distribution, and the tertiary plate further refines the steam flow. Utilizing the resistance characteristics of the primary, secondary, and tertiary plates to the steam, it facilitates forced homogenization of the airflow, resulting in uniform and stable steam pressure and flow velocity entering the steam turbine, reducing the risk of rotor vibration.

The utility model belongs to the technical field of motors, and particularly relates to an enameled wire and a motor stator, the enameled wire comprises a wire core, an insulating layer wrapping the wire core, and a foaming coating capable of forming a foaming layer through foaming expansion, and the foaming coating covers the outer surface of the insulating layer; when the enameled wire provided by the utility model is applied to a motor stator, the foaming coating fills gaps among stator slots through the foaming expansion characteristic, the installation stability of the enameled wire is effectively enhanced, the movement phenomenon is inhibited, and the enameled wire has the advantages of low cost and easiness in installation.

According to the bearing mounting equipment, a sleeve extends in the first direction, a pressing ring is located on one side, in the first direction, of the sleeve, a first through hole is formed in the pressing ring, the first through hole penetrates through the pressing ring in the first direction, and the axis of the first through hole coincides with the axis of the sleeve; a first boss is arranged on the side, away from the sleeve, of the pressing ring in the first direction, the first boss is arranged outside the first through hole in a surrounding mode around the axis of the first through hole, a plurality of first grooves are formed in the side, away from the pressing ring in the first direction, of the first boss, and the first grooves are evenly distributed around the axis of the first through hole; and the plurality of first pressure sensors are arranged corresponding to the plurality of first grooves, and each first pressure sensor is located in the corresponding first groove. In conclusion, according to the bearing mounting equipment in the embodiment, the risk that the driving end of the charging pump vibrates when the bearing is mounted can be reduced; the mechanical seal in the charging pump is prevented from being broken due to vibration of the driving end of the charging pump when the bearing is installed.

The utility model provides a kind of wound pipe heat exchanger, comprising: vertically arranged shell side cylinder, the central part of the first end of which is equipped with shell side connector;Center cylinder, which is arranged in the shell side cylinder along the axial direction;Multiple heat exchange tubes, which are arranged in the shell side cylinder along the axial direction and are spirally wound on the outer periphery of the center cylinder from inside to outside;Tube sheet and tube box, and the tube box is equipped with tube side connector;The tube sheet is transversely arranged in the shell side cylinder and the outer periphery of the center cylinder, and is relatively close to the first end of the shell side cylinder, and the tube sheet has a first surface facing the first end of the shell side cylinder and a second surface opposite to the first surface, and the second surface is arranged corresponding to the axial end of each heat exchange tube to support the end of each heat exchange tube;At least part of the tube box is located in the outer periphery of the center cylinder in the shell side cylinder, and is arranged on the side of the first surface of the tube sheet and is connected with the end of the heat exchange tube supported on the tube sheet;The tube side connector is located on the first end of the shell side cylinder, avoiding the shell side connector.

This utility model discloses a foundation pit monitoring device for foundation pit construction, relating to the field of building construction technology. The device includes a vertical insertion rod with a T-slot at its top. A T-shaped collar is movably inserted into the inner wall of the T-slot. A horizontal connecting rod is fixedly connected to one end of the T-shaped collar, and a liquid level monitoring sensor is fixedly connected to the end of the horizontal connecting rod away from the T-shaped collar. This utility model achieves locking through the sliding connection between the T-shaped collar and the T-shaped positioning block, and the right-angle insertion between the vertical insertion rod and the vertical slot, both using tolerance fits. A single person can complete the assembly of the device within minutes, improving efficiency by 90% compared to traditional bolt connections, making it particularly suitable for rapid deployment in emergency monitoring scenarios.