47results about How to "Guaranteed Rigidity Requirements" patented technology

The invention discloses a fixing structure of a tube panel of a heat absorber, which comprises a heat-receiving tube forming a tube panel body, a fixed tube clamp set, a sliding tube clamp set, and a rigid frame supporting the tube panel. At the zero point P, the interval h of the sliding pipe clamp group is set on the upper and lower sides of the fixed pipe clamp group. A fixed tube clamp group is set in the middle of the vertical direction of the tube panel, and a sliding tube clamp group is set up and down according to the height of the tube panel every distance h, which not only ensures the rigidity requirement in the vertical direction of the tube panel, but also ensures that each tube clamp in the tube panel group Welded with separate heating tubes respectively, allowing each heating tube to expand freely upwards or downwards independently with the fixed point in the middle of the vertical direction of the tube panel as the expansion zero point, avoiding the uneven energy flow density of the heating tube due to the spot and the working medium in the tube Bending deformation due to uneven flow; the relatively independent fixed structure of a single tube also makes on-site tube panel maintenance and tube replacement simple and easy.

The invention discloses a manufacturing method for the integral molding of a lightweight carbon fiber chassis, comprising the following contents: preforming guide rails and wedge-shaped parts; realizing threaded mounting holes; realizing threaded mounting holes through metal embedded parts, on the metal embedded parts Pre-processing the installation bottom hole, using the pre-processing installation bottom hole to accurately position on the molding surface of the cabinet mold; pre-forming the side mounting beam; cabinet layering; machining; surface metallization on the internal and external surfaces; surface three-proof. The present invention conducts reasonable split design, preforms guide rails, wedge-shaped parts, and side connecting beams, and then assembles them with box molds to carry out overall box laying and autoclave co-curing molding, which not only reduces manufacturing difficulty, but also ensures The overall rigidity requirements of the box body; more printed board components need to be installed inside the box body, power supply components need to be installed outside the box body, there are many installation interfaces, and the location is compact. Through the precise positioning technology of embedded parts, the high precision requirements of the installation position size are realized. , to ensure the connection strength.

The invention discloses a vertical gear hobbing machine which comprises a rack, as well as a bracket and a stand column arranged on the rack, wherein a working table is arranged on the bracket; a hobbing power head assembly is arranged on the stand column and is characterized by comprising a hobbing cutter installing device, a hobbing slewer and a cutter channeling device; the hobbing cutter installing device comprises a relay shaft assembly and a cutter channeling spline shaft; the relay shaft assembly comprises a spline housing fixedly arranged on a hobbing rotary table; the spline housing is matched with the upper section of the cutter channeling spline shaft; the lower section of the cutter channeling spline shaft is connected and fixed with a flat key groove, and the flat key groove is formed in the central hole of a hobbing cutter; the cutter channeling spline shaft is provided with a central hole; a T-shaped pull rod is inserted in the central hole; a plurality of disc springs are arranged on the pull rod in a sleeving manner, and the pull rod is arranged between the pull rod head and the upper end part of the cutter channeling spline shaft; the upper end face of the pull rod is propped against the lower end face of a disc spring ejector rod; the disc spring ejector rod is connected with the piston rod of a hobbing cutter tensioning oil cylinder; and the upper end face of the pull rod is matched with a cutter buckle assembly. Compared with the prior art, the vertical gear hobbing machine has higher machining precision.

The invention discloses a lithium cell safety valve which comprises a sealing ring, a top cover, a PTC (Positive Temperature Coefficient) ring, an anti-explosion membrane and a pore plate, wherein the top cover, the PTC ring, the anti-explosion membrane and the pore plate are sequentially arranged in the sealing ring from top to bottom; a horizontal clip fastening end of the anti-explosion membrane is clipped and fastened above the periphery of the top cover; and the periphery of the top cover is aligned to the outer edge of the PTC ring. The lithium cell safety valve also comprises insulating layers which are arranged at the inner sides of a vertical clip fastening end and the horizontal clip fastening end of the anti-explosion membrane, at the outer side of the edge on the periphery of the top cover and at the outer side of the edge of the PTC ring and clipped and fastened above the periphery of the top cover. In the lithium cell safety valve, the insulating layers are arranged at the outer side of the edge on the periphery of the top cover, at the outer side of the edge of the PTC ring and between the vertical clip fastening end and the horizontal clip fastening end of the anti-explosion membrane, which can prevent the anti-explosion membrane from causing a short circuit on the PTC ring to invalidate the PTC ring and guarantee that the protection function of the PTC ring isnot influenced, thus the lithium cell safety valve can be used for solving the problem of cell leakage quality and has the advantages of high rigidity and convenient assembly.

The invention relates to a telescopic compensation structure suitable for a low-temperature heat insulation tube. The telescopic compensation structure comprises a protecting sleeve tube component arranged between inner tubes and an outer tube of the low-temperature heat insulation tube. The protecting sleeve tube component comprises a corrugated-tube-shaped expansion joint and a protecting sleeve tube. The expansion joint is arranged in the protecting sleeve tube. The expansion joint is used for connecting of the two sections of inner tubes, and sealing is carried out at the connecting portion. The two ends of the protecting sleeve tube are provided with annular supporting plates and fixing plates respectively and are connected with the inner tubes. The supporting plates are fixedly connected with the inner tubes in a spot-welding mode. The fixing plates are fixedly connected with the inner tubes in a full-welding mode. At least two through holes which are distributed in the periphery direction are formed in the tube wall of the protecting sleeve tube. A plurality of evenly-formed through holes are formed in the supporting plates and the fixing plates. Good telescopic compensating capacity is achieved, the basic rigidity using requirements can be met, complete washing can be conveniently carried out on the outer portion of the expanding joint, so that impurities such as grease are removed, and the problem that a dead corner evacuating cannot be solved easily is effectively avoided.

The invention relates to an SMA-driven spiral heat variable stiffness active control mechanism, which relates to the field of aerospace technology. The present invention aims to solve the problem that the active control mechanism of the thermally variable stiffness of the outer thin shell of the aircraft produces less control force during the working process, and the control effect on the stiffness change of the material with higher stiffness is relatively weak, which is limited in practical application. Big question. The present invention includes multiple quarter-helical expansion rings, multiple SMA driving circular tubes and multiple pre-tightening mechanisms, and multiple quarter-helical expansion rings are spirally arranged on the inner wall of the cylindrical thin shell. The first The beginning of the quarter helical expansion ring and the end of the last quarter helical expansion ring are affixed to the thin cylindrical shell through a pre-tensioning mechanism, and the adjacent two quarter helical expansion rings drive a circular tube or a preloaded tube through SMA. The tightening mechanism is connected, and multiple SMA driving round tubes and multiple pre-tensioning mechanisms are alternately arranged. The invention is used for the thermal variable stiffness control of the outer thin shell of the aircraft.

The invention discloses a screen frame lifting device for a printing machine. The screen frame lifting device for the printing machine comprises a machine frame, a lifting transmission device and a screen frame, wherein the lifting transmission device is installed on the machine frame, and the screen frame is installed on the lifting transmission device. The screen frame can be widely applied to large-area self-aligning printing machines, the space of the whole device is greatly reduced, and meanwhile the demands for precision and rigidity of the screen frame in the process of lifting are met.

The invention relates to an FF oil tank and a production process thereof. The oil tank comprises a tank body (1), wherein the tank body (1) comprises an outer housing (1.1) and an inner housing (1.2) which sleeves in the outer housing (1.1), a gap layer (1.3) is formed between the outer housing (1.1) and the inner housing (1.2), a first liner layer (2.1) is arranged on the inner wall of the inner housing (1.2), a second liner layer (2.2) is arranged on the first liner layer (2.1), and a conductive layer (3) is arranged on the second liner layer (2.2); the inner housing (1.2) comprises an inner barrel and closure heads which are arranged at two ends of the inner barrel, the outer diameter of the closure heads is equal to the inner diameter of the inner barrel, the closure heads are inserted into the inner barrel, and positioning dowels are driven in the connecting parts of the closure heads and the inner barrel. The invention relates to the FF oil tank and the production process thereof. The FF oil tank is light in weight, good in corrosion resistance and good in sealing effect.

The invention discloses a micro pneumatic pump of low power consumption air guiding structure, wherein the gas guiding component contains air cock, briquette and piston body with multiple small piston cavities; the air hole is opened on the briquette in connection with the air cock; the one-way air vent valve is fixed on the air hole; the air vent hole connects each piston cavity to form one-way air vent passage; the driving component contains motor, eccentric wheel, compression piece, driving shaft and piston rack; the elastic fixation case and air orifice are set under each piston cavity with one-way valve on the air orifice; the corresponding piston installment position and air orifice are set on the compression piece, which encase the elastic fixation case tightly; the one-way air-in passage is composed of air orifice under each piston cavity, one-way air orifice valve and air orifice on the compression piece; the motor compresses the piston cavity on the piston rack through the eccentric wheel and driving compression piece of driving shaft.

The invention relates to a self-elevating drilling platform manufacturing tool and a manufacturing method. The production tool has a platform body, and the bottom surface of the platform body is welded with six ear seats arranged in three rows and two rows according to the size of the welding position of the six upper columns of the jack-up drilling platform on the platform. The connecting holes of each ear seat are The overall machining is performed by installing the platform body on the machine tool. When the jack-up drilling platform is manufactured, the manufacturing tooling is supported by brackets, and the manufacturing tooling is respectively hinged to the upper and lower columns. After adjusting the level of the reference level of the manufacturing tooling, the characteristics of gravity are used to ensure the perpendicularity of the axis of each column to the reference level. The six upper columns and the six lower columns are respectively spot-welded by a plurality of tie bars to form the upper and lower column rigid bodies, and the upper and lower column rigid bodies are respectively welded with the platform and the bottom plate to form the platform body and the base. The self-elevating drill floor produced by the application of the invention has strong bearing capacity, good rigidity and free lifting, and the production method of the invention has the advantages of high working efficiency and low production cost.