11results about How to "Avoid thermal expansion" patented technology

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The utility model relates to the technical field of resistors, in particular to an electronic equipment resistor suitable for a wide temperature range. The resistor comprises a resistor body, supporting assemblies are movably connected to the positions, close to the two ends, of the bottom of the resistor body, and protection assemblies are arranged between the outer wall of the resistor body and the two supporting assemblies. Through collaborative design of the protection assembly and the supporting assembly, the reliability problem of a traditional winding resistor in a wide-temperature and vibration environment is solved. The protection assembly adopts an alloy spiral ring to wind a resistor body, a gap is reserved to buffer thermal expansion and cold contraction, and material oxidation and resistance drift are inhibited; the spiral structure and the gap form an elastic buffer space, vibration energy is absorbed, and welding spot stress concentration is avoided. The supporting assembly is movably connected with the bottom of the body through an L-shaped honeycomb supporting plate, disperses vibration stress, adapts to size changes and is in flexible connection with the end in cooperation with fine adjustment of screws, and structural stability is guaranteed.

An impact tool is provided. A movable support body at least partially supports a final output shaft and a drive mechanism, and is integrally movable in an axial direction of a drive axis with respect to a housing. A force applying member applies a force to a front side of the movable support body in the axial direction. A first guide shaft is configured to extend in the axial direction to slidably guide the movable support body to move in the axial direction. At least one intermediate shaft is configured to rotate in conjunction with rotation of a motor shaft to transmit power of the motor to the drive mechanism. At least one bearing supports an end portion of the front side in the axial direction of the first intermediate shaft. A single metal support body is configured not to move with respect to the housing and to support the at least one bearing. In addition, the single metal support body has a first hole in which the first guide shaft is partially inserted. Accordingly, high power and low vibration can be simultaneously achieved.

The invention discloses a chamfering device and a chamfering method for intelligently manufacturing a compressor cylinder block, and relates to the technical field of chamfering equipment. The device comprises two device bodies, a fixing table is fixedly installed between the sides, close to each other, in the two device bodies, a storage table is fixedly installed on the front face of the fixing table, a driving mechanism is arranged between the sides, close to each other, in the back ends of the two device bodies, and a machining mechanism is arranged on the outer wall of the driving mechanism in a penetrating mode; an electric threaded rod is rotationally mounted in one end of the front face of the machining mechanism, and a sliding plate penetrates through and is movably mounted on the outer wall of the electric threaded rod. The air dryer is prevented from being eroded by external dirt during standing, the dirt is blown to the chamfering head or the surface of a workpiece during working of the air dryer, scraping is further caused, the chamfering precision is reduced, continuous blowing is achieved during machining, and the situation that workpiece flying wires are attached to the surface of the chamfering head due to high chamfering temperature is effectively avoided.

The utility model relates to a kind of vertically shore power box up-down movement operation bearing device, including guide frame and mobile power receiving platform;The guide frame is set in the side of approach pier and supports mobile power receiving platform along vertical direction, the mobile power receiving platform side is provided with operation member, the slider assembly is equipped on the operation member, double track is equipped on the guide frame, the slider assembly slides along the double track, the slider assembly includes two Y direction slider and an X direction slider, the Y direction slider is installed in the both sides of track and is used to limit vertical direction movement, the X direction slider is arranged in platform bottom and is used to limit horizontal direction displacement.The utility model can effectively adapt to different water level change, realize the stable butt joint of ship and shore power facility, ensure that power supply process is safe and reliable, improve the reliability and security of port shore power facility.

This utility model relates to the field of battery electrode sheets and discloses a self-calibration and positioning device for battery rolling rollers. It includes a positioning platform with a hollow side wall and a lifting frame embedded within it. A top plate is horizontally fixed to the top of the lifting frame. A straight rod is fixedly connected to the top of the positioning platform, and a cylinder is fixedly connected to the middle of the straight rod. A retainer is fixedly connected between the top of the cylinder and the top plate. Slider blocks are sleeved on both sides of the straight rod, and a tripod is hinged to the top of each slider. A connecting seat is hinged to the top of the tripod, and the top of the connecting seat is fixed to the bottom of the top plate. Bearing seats are fixedly connected to the bottom of both sides. This self-calibration and positioning device for battery rolling rollers, by incorporating the lifting frame, achieves stable and adjustable lifting and real-time self-calibration positioning of the upper rolling roller relative to the lower rolling roller, eliminating the need for manual disassembly and assembly. This improves electrode sheet thickness control and solves the problem that traditional drilling positioning structures cannot dynamically adjust the rollers.

The invention provides a metal product grinding machining device based on multidirectional numerical control, and relates to the field of metal component grinding equipment. The metal product grinding device based on multi-directional numerical control comprises component clamping equipment, stress releasing equipment and multi-directional grinding equipment, the multi-directional grinding equipment comprises a coarse grinding assembly and a fine grinding assembly which are used for sequentially grinding the surface of a metal component, and the coarse grinding assembly and the fine grinding assembly are each provided with an XY-axis assembly; and the distance adjustment and the front-back dislocation adjustment between the coarse grinding assembly and the fine grinding assembly are achieved. According to the metal product grinding machining device based on multidirectional numerical control, when a metal component is ground, rough grinding and accurate grinding are conducted at the same time, the interior of the metal component is heated through the first flame tube before grinding, temperature balance is achieved between a repair area and the position around the repair area, internal stress is released in the machining process, and the metal component is ground; therefore, the metal deformation after grinding is small, and the possibility of burning is greatly reduced.

The invention provides a vehicle drive device. Provided is a technique for suppressing deterioration of noise transmitted from a rotating electric machine to a housing. A vehicle drive device disclosed in the present specification is provided with: a rotating electrical machine having a hollow output shaft; a housing that accommodates the rotating electrical machine; an intermediate shaft extending in the axial direction of the rotating electric machine in the through hole of the output shaft and transmitting the torque of the rotating electric machine to wheels of a vehicle; and a bearing having an outer ring fixed to the housing and an inner ring fixed to the output shaft and supporting the output shaft so as to be rotatable with respect to the housing, the intermediate shaft having a first flow path for supplying a refrigerant to the rotating electrical machine, the housing having a second flow path for supplying the refrigerant to the first flow path, and the intermediate shaft having a second flow path for supplying the refrigerant to the second flow path. A part of the second flow path extends in the circumferential direction of the outer ring in the vicinity of the outer ring fixed to the housing.

The application relates to a deviation correction detection device and an oven equipment. The device comprises a detection unit arranged on at least one side of a substrate running path, which is used for detecting the deviation of the substrate edge. The detection unit comprises a photoelectric detection assembly and a reflection assembly, and a detection light path is formed between the photoelectric detection assembly and the reflection assembly. An execution unit comprises a position adjustment mechanism, which is in contact with the substrate and is used for driving the lateral movement of the substrate. A control unit is used for controlling the lateral movement of the position adjustment mechanism to correct the deviation of the substrate according to the deviation signal detected by the detection unit. The reflection assembly and the position adjustment mechanism are arranged in a first temperature region, the photoelectric detection assembly and the control unit are arranged in a second temperature region, and the temperature of the first temperature region is higher than that of the second temperature region. The scheme provided by the application can improve the deviation correction control precision of the substrate in a high-temperature environment, thereby improving the tension uniformity of the substrate in the coating and baking process.

This invention relates to the field of oil suction pipe welding technology, and discloses an intelligent welding device and method for oil suction pipes of tunneling machines. The device includes a welding table and a mounting frame fixedly connected to the top of the welding table, and also includes a placement groove on the top of the welding table. Two welding heads are provided on the surface of the mounting frame. A rotating disk is rotatably connected inside the welding table, and an alignment component is located on top of the rotating disk. Through the use of the alignment component, an air source enters the interior of the first fixed disk through an air inlet pipe, causing the fixed plate to rise via a first screw, and the second support disk enters the interior of the bend. When the rising screw does not rise, an air source enters the interior of the second fixed disk through a first connecting pipe, causing the fixed plate to rotate the rotating rod and rotating cylinder. The rotating gear drives the extrusion tooth plate to move via a rotating gear ring, causing the arc-shaped plate to support the bend and straight pipe, thereby achieving anti-eccentric alignment.

The invention discloses a PTC (Positive Temperature Coefficient) heater, relates to the field of electric heating, and solves the problem that the sealing performance of the PTC heater is influenced by thermal expansion. The PTC heater comprises an automobile connecting plate and a PTC heater support, a support fixing assembly is installed at the joint of the automobile connecting plate and the PTC heater support, a PTC heater assembly is arranged on one side of the PTC heater support, an anti-cracking assembly is installed on one side of the PTC heater support, and a water inlet opening and closing assembly is installed on the other side of the PTC heater support. The PTC heater assembly comprises a first metal protection plate and a second metal protection plate, and a PTC heating core is installed between the first metal protection plate and the second metal protection plate. The first metal protection plate and the second metal protection plate are fixed in an auxiliary mode through external mechanical pressing, and thermal expansion of the first metal protection plate and the second metal protection plate is avoided.