60results about How to "Eliminate bending moment" patented technology

The invention provides a cutting arm of a development machine and the development machine. The cutting arm of the development machine comprises a cutting head, a cutting main shaft, an outer cylinder, a suspended arm cylinder and a bearing set, wherein a bearing is fixedly arranged on the suspended arm cylinder, the outer cylinder is connected with the suspended arm cylinder through the bearing, and a bending moment generated during cutting can be directly transmitted to the suspended arm cylinder through the outer cylinder and the bearing; and the cutting head is fixedly connected to the front end of the outer cylinder and is connected with the cutting main shaft through key connection, and thus torsion transmission can be realized. The cutting arm provided by the invention can be used for removing an acting force of the bending moment to the cutting main shaft, and thus the safety of the cutting main shaft can be increased; and simultaneously, relative rotating positions of the outer cylinder and the suspended arm cylinder are far away from the cutting head, and thus the service life for rotary sealing can be effectively prolonged.

The invention relates to a spatial intelligence flexible manipulator tester, comprising a support, a base and at least one manipulator assembly. The base is rotatablely arranged on the support; the manipulator assembly comprises a flexible joint and an armed lever, wherein the flexible joint comprises a fixed part, a rotating part, a motor and a balance pillar, and the front end of the armed lever is rotatably connected to the fixed part through the rotating part, wherein the flexible joint of one manipulator assembly is in fixed connection with the base through a fixed part, and the flexible joints of other manipulator assemblies are in fixed connection with the rear end of the armed lever of a prior manipulator assembly through fixed parts. The output shaft of the motor is in connection with the rotating part through a flexible leaf spring; the bottom end of the balance pillar is fixedly arranged on the fixed part; a balance inhaul cable is arranged between the balance pillar and the armed lever. The spatial intelligence flexible manipulator tester is provided with the support and the balance inhaul cable, thereby stimulating a micro gravity condition so as to perform space structure dynamics performance experimental study on a flexible manipulator, and has the characteristics of simple structure and low cost.

In an diaphragm chuck ( 1 ) with clamping jaws ( 3 ) inserted in its chuck body ( 2 ) that are in a driven connection with a diaphragm ( 4 ) that can be deformed by an axially adjustable actuator ( 5 ) and is provided with clamping jaws ( 3 ) with contact pieces ( 22 ), in which counterweights ( 8 ) assigned to the clamping jaws ( 3 ) are inserted into recesses ( 7 ) of the chuck body ( 2 ) and the clamping jaws ( 3 ) can be clamped against the diaphragm ( 4 ) by means of quick-clamping devices ( 31 ) engaging in the contact pieces ( 22 ), the clamping jaws ( 3 ) being supported directly against a first reference surface ( 23 ) running axially in parallel to the chuck body ( 2 ) in the clamping position and against a second reference surface ( 24 ) running at right angles to the first reference surface ( 23 ) and worked onto the diaphragm ( 4 ), the contact pieces ( 22 ) are each provided with an intermediate element ( 101 ), for example in the form of a ball joint ( 102 ), in the area between the clamping jaws ( 3 ) and the quick-clamping devices ( 31 ) by means of which the flexural moments and / or rotational torques created by the quick-clamping device ( 31 ) can be eliminated and it is possible to transmit exclusively axially vectored tensile forces onto the clamping jaws ( 3 ).

The invention discloses a field torque calibration device. The field torque calibration device comprises a support, a supporting sleeve, bearings, a positioning shaft, a static correction beam, a balance disc and weights. The supporting sleeve used for installing the positioning shaft is arranged on the support, the positioning shaft and the bearings are installed in the supporting sleeve in a matched mode, one end of the positioning shaft is connected with a part to be measured, and the other end of the positioning shaft is fixedly connected with the static correction beam; the weights are hung at one end of the static correction beam, and the balance disc is installed at the other end of the static correction beam. According to the field torque calibration device, the two rows of rolling bearings are adopted as supporting of the positioning shaft, bending moment caused by self-weight of the weights is eliminated, friction moment of the supporting part is reduced, and the problem that pure torque loading can not be carried out on a large torque sensor is solved; the balance disc is installed at one end of the static correction beam, a circular arc structure is arranged at the other end of the static correction beam, and the problem that when the static correction beam is inclined, the length of a force arm is changed is solved; by adopting a thin steel strip to hang the weights, it is ensured that the action force arm of the gravity of the weights is located on the horizontal line all the time, system errors of the device are reduced, and the sensitivity of the device is improved.

The invention provides a wind tunnel corner assembling method, the method is simple, the universality is high, the operation is easy, the precision is high, and the problem of precision control of assembling of a large-scale wind tunnel corner segment is solved. Guiding vanes of the wind tunnel corner segment and an elliptical ring shell are assembled in a horizontal plane so that the angle between the guiding vanes and the plane of the elliptical ring shell is adjusted more easily, the guiding vanes can maintain uniform space and consistent angle, and the assembling difficulty between the guiding vanes and the elliptical ring shell is reduced; and the elliptical ring shell of the wind tunnel corner segment and a straight cylindrical shell A and a straight cylindrical shell B are assembled in a vertical plane so that the bending moment generated in an assembling process of the straight cylindrical shell A and the straight cylindrical shell B due to shift of the center of gravity is eliminated, the assembling positioning of the elliptical ring shell and the straight cylindrical shell A and the straight cylindrical shell B is more accurate, the requirement of multi-time adjustment of the placement attitude of the straight cylindrical shell A and the straight cylindrical shell B of the conventional method is omitted, and the assembling process is simplified.

The invention discloses a fan impeller for cooling, wherein, the impeller comprises a wheel hub and a plurality of blades; blade installation seats are arranged around the wheel hub; a swing connection component is arranged on the blade handle of each blade; and swing connection is carried out by the swing connection component and the corresponding blade installation seats. As swing connection is adopted, the blades can swing and shimmy when the fan is operating, thus eliminating the bending moment in the vertical direction of the blade handle, decreasing bending stress of the blade handle, avoiding the damage on the blade handle, and being beneficial for implementing effective application of the large-diameter impeller; and the fan impeller also has the advantage of conveniently adjusting the installation angles of the blades, thus the installation angles can be preset according to the use requirements of a customer before delivery to achieve more convenient and faster field installation.

The invention relates to mining machinery, and particularly relates to a side support device for a coal mining machine, aiming to solve the problem that the existing support device can not effectively inhibit the back and forth vibration of the coal mining machine. In order to achieve the purpose, the side support device comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a first support base and a second support base, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on the first side of the coal mining machine, the third hydraulic cylinder and the fourth hydraulic cylinder are arranged on the second side of the coal mining machine, the first support base is connected with the outer side ends of the first hydraulic cylinder and the second hydraulic cylinder, and the second support base is connected with the outer side ends of the third hydraulic cylinder and the fourth hydraulic cylinder. When the side support device works, the first hydraulic cylinder, the second hydraulic cylinder and the first side of the coal mining machine can form a triangular structure, the third hydraulic cylinder, the fourth hydraulic cylinder and the second side of the coal mining machine can also form a triangular structure, and the first support base and the second support base are abutted against the side wall of a coal mine tunnel. The side support device with the structure can be used for effectively inhibiting the back and forth vibration and the left and right vibration of the coal mining machine due to cutting.

The invention aims at providing an auxiliary frame fatigue test bending moment and torque elimination device comprising a spindle, a height adjusting device, a universal joint, a transmission shaft and a torque elimination device. The spindle is installed on the height adjusting device and can perform elevating motion along a vertical direction under the effect of the height adjusting device. The two ends of the spindle are arranged at the two sides of the height adjusting device. The front end of the spindle is provided with the universal joint, and the rear end of the spindle is provided with a workpiece connecting part. The torque elimination device is connected with the universal joint through the spindle. The other end of the torque elimination device is connected with the transmission shaft. The defects in the prior art can be overcome by the device, and the device has the characteristics of eliminating the bending moment and the torque and enhancing the service life and the test accuracy.

The invention provides a connecting structure of a middle phalanx and a proximal phalanx of a prosthetic finger. The connecting structure comprises a finger proximal phalanx (5), a finger middle phalanx (6) and a tension spring (8), wherein the finger middle phalanx (6) is rotatablely connected onto the finger proximal phalanx (5); a stretching spring far end cylindrical pin (81) is fixed on the finger middle phalanx (6); a tension spring near end cylindrical pin (82) is fixed on the proximal phalanx (5); the axial lines of the tension spring far end cylindrical pin (81) and the tension spring near end cylindrical pin (82) are parallel to the rotating axial line of the finger middle phalanx (6); and the two ends of the tension spring (8) sleeve the tension spring far end cylindrical pin (81) and the tension spring near end cylindrical pin (82). In a process that the finger middle phalanx rotates around the finger proximal phalanx, the far end of the tension spring can rotate around the tension spring far end cylindrical pin; and the bending moment effect received by the tension spring can be greatly reduced or even eliminated.

The invention relates to a vending machine having a simple structure. The vending machine having the simple structure comprises a machine frame; a storage cavity and a pickup hole are arranged in themachine frame; several supply tracks for placing sold articles are arranged in the storage cavity; a delivery hole is formed on one end of the track direction of the supply track; a delivery mechanismfor transmitting the sold articles towards the delivery hole is arranged at the other end; the delivery mechanism comprises several push parts arranged on the various supply tracks, and a driving motor for driving the delivery part; the number of the driving motor is at least one; a first coupling part is arranged on the output shaft of the driving motor; each delivery part is separately providedwith a second coupling part; the first coupling part and the second coupling part can be in separable connection; and a switching mechanism for moving the first coupling part to any second coupling part is arranged on the machine frame. By adoption of the scheme, delivery for any supply track can be realized by adoption of the single driving motor; and thus, the vending machine having the simplestructure in the invention is low in equipment production cost, convenient to maintenance, and precise, simple and convenient to debug.

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a sleeve type soil grasping device sensor device for measuring the test soil body inside micro deformation in a geotechnique direct shearing test. The device consists of components such as a spoon-shaped soil grasping device, a displacement transmission rod, a sleeve, a sleeve support frame, a fixed support frame, a displacement transmission transfer joint, a displacement sensor, a fixed screw cap and a screw. The spoon-shaped soil grasping device is connected with the displacement sensor through the displacement transmission rod and the displacement transmission transfer joint; the displacement transmission rod sleeve achieves a blocking effect; the measuring precision is improved; the whole system is fixed on the outer wall of a shearing box of a geotechnique direct shearing instrument through the sleeve support frame and the fixed support frame. The spoon-shaped soil grasping deviceis buried inside the test soil body; when the test soil body deforms, the spoon-shaped soil grasping device is driven to move together, so that the micro displacement of the soil body is measured andis accurately transferred to the displacement sensor arranged outside the shearing box. A plurality of sets of the sleeve type soil grasping device sensor devices can be connected in parallel to be jointly used, and can be used for simultaneously measuring the micro deformation condition of different positions of the test soil body in the shearing box in the same geotechnique direct shearing test.

The invention discloses a method for achieving synchronous pushing of large-span steel-concrete composite beams through a cable-stayed tower. The method comprises the steps that: the tower is mounted on a steel box beam, a hinged support is arranged at the bottom of the tower, and the tower is connected with the top of the steel box beam through the hinged support; and a pushing device is used for pushing a guide beam and the steel box beam to a middle pier and a guide beam receiving platform successively from a splicing area, and in the pushing process, under the action of the hinged support, the tower can incline by a small angle. The hinged support is arranged at the bottom of the tower so that the tower can incline, the constraint of rotation in a bridge direction can be released, and the tower and the steel box beam can rotate freely; in the pushing process, when the hogging moment of a pushing cantilever is increased or the guide beam is mounted onto the piers, the change of the horizontal force of the top of the tower can be automatically eliminated in a tower inclination mode, the whole tower is only pressed and is not bent, and the root bending moment is eliminated, so that stress concentration is avoided, the structural safety is guaranteed, and the problem of root stress concentration of the temporary tower during synchronous pushing of the large-span steel-concrete composite beams is solved.

The present invention relates to the technical field of helicopter main support beam tests, especially to a main support beam fatigue test device. The device comprises a main support beam (15), connection support seats and a load module. There are four connection support seats arranged on the main support beam (15); the load module comprises an X-directional load loading joint (11), a Z-directional load connection fork ear (12), a Y-directional balance load loading joint (13) and a Y-directional load loading joint (14), wherein the X-directional load loading joint (11), the Z-directional loadconnection fork ear (12) and the Y-directional load loading joint (14) are configured to apply loads in X, Y and Z directions to a main support beam fatigue test device, and the Y-directional balanceload loading joint (13) is configured to eliminate the bending moment of a Y-directional load to a connecting bolt. The main support beam fatigue test device is simple in structure and convenient to dismount, can meet boundary simulation when the main support beam fatigue test is performed, and can apply load to the main support beam according to test requirements.

The invention discloses a broadband double-table parallel pushing test system based on a sliding table. Two sets of vibration power amplifiers are electrically connected to a first vibrating table anda second vibrating table respectively; a sliding table is arranged between the first vibrating table and the second vibrating table and is fixedly connected to the first vibrating table and the second vibrating table; the sliding table is rotationally connected to a sliding plate; a moving coil of the first vibrating table and the sliding plate are fixedly supported; a moving coil of the second vibrating table is hinged to the sliding plate; a test piece in the test system is fixed on the sliding plate; an acceleration sensor is arranged on the test piece; the acceleration sensor is in signalconnection with a controller; the controller is in signal connection with the two sets of vibration power amplifier signals; and after the controller receives a detection signal of the acceleration sensor, the controller sends a driving signal to the vibration power amplifiers. According to the system, the exciting force of the two vibrating tables is applied to the same test piece, and loading of sinusoidal and random vibrations with the broadband of 10 Hz to 2000 Hz is achieved; and through the system, the authenticity of the vibration environment test simulation of the big-quality test piece can be improved, and the working efficiency is improved.

The invention discloses an axial impeller with vanes and hubs in composite hinge, comprising the hubs, the vanes and vane joints connected with the connecting ends of the vanes. The axial impeller has the key points that the hubs are provided with at least two composite hinge devices with zero bending moment; each composite hinge device is provided with a vertical shaft hole and a horizontal shaft hole; a joint of double lugs of each hub is hinged with each vertical shaft hole through a vertical shaft; the vane joints are hinged with the horizontal shaft holes through horizontal shafts; the vanes have a downward swinging angle less than or equal to 5 DEG, an upward swinging angle less than or equal to 3 DEG and a left and right swinging angle less than or equal to 3 DEG. In the invention,two bending moments at the roots of the vanes are eliminated, the problem that the roots of the vanes of a large axial flow fan is easy to crack is solved, the structure is optimized, the weight is reduced, the production cost is reduced, the service life of the large axial flow fan is prolonged, and meanwhile, the quality is ensured. The axial impeller in composite hinge can be widely installed and used on equipment such as a large evaporative condenser, a large air-cooling tower and the like.

The invention discloses an air cylinder and cylinder head matching body which comprises a cylinder block, an air cylinder liner, an air cylinder head and a seal ring, wherein the air cylinder liner is arranged in an air cylinder hole of the cylinder block; the air cylinder head is fixedly connected with the cylinder block through cylinder head bolts; and the seal ring is arranged in the air cylinder liner and matched with an inner side line of a matching surface of the air cylinder liner and the air cylinder head in a sealed manner. The air cylinder and cylinder head matching body is simple in structure, greatly eliminates a bending moment of pre-tightening forces of the cylinder head bolts on the air cylinder head, and greatly increases the capability of the air cylinder head of bearing the pressure of gas in a cylinder.

The invention relates to a prefabricated assembly type composite slab suspension supporting structure and a composite slab construction method thereof. The prefabricated assembly type composite slab suspension supporting structure is characterized in that the prefabricated assembly type composite slab suspension supporting structure comprises supporting vertical rods, supporting horizontal rods, supporting inclined rods, horizontal inclined rods and horizontal connecting rods, rod parts are connected with each other to form a supporting system through square plate ports and diagonal lug plates, and the supporting system is suspended and supported on a prefabricated beam through internal threaded steel pipe embedded parts embedded in the prefabricated beam side, beam side fixed screws and lug plates. The composite slab construction method includes the steps of ribbed concrete composite slab prefabrication, prefabricated beam installation, supporting unit assembly, supporting unit suspension, supporting system forming, supporting system preloading, ribbed concrete composite slab lifting, ribbed concrete composite slab perforated steel bar construction, upper-layer reinforcement binding, composite slab flat-fell seam processing, composite layer concrete casting, and supporting removal, the construction period can be shortened, the material loss and the engineering quantity are lowered, the engineering cost is lowered, and the prefabricated assembly type composite slab suspension supporting structure has good technical and economic benefits.

The invention relates to the mining machinery and provides vibration-absorption mineral mining equipment, aiming at solving the problem that front-and-back vibration cannot be effectively inhibited in the existing mineral mining equipment. The vibration-absorption mineral mining equipment provided by the invention comprises a vibration absorption device, wherein the vibration absorption device comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a first supporting seat and a second supporting seat, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on the first side of the mining equipment; the third hydraulic cylinder and the fourth hydraulic cylinder are arranged on the second side of the mining equipment; the first supporting seat is connected with the outer side ends of the first hydraulic cylinder and the second hydraulic cylinder; the second supporting seat is connected to the outer side ends of the third hydraulic cylinder and the fourth hydraulic cylinder. When the mineral mining equipment operates, the first hydraulic cylinder, the second hydraulic cylinder and the first side of the mining equipment form a triangular structure, the third hydraulic cylinder, the fourth hydraulic cylinder and the second side of the mining equipment also form a triangular structure, and the first supporting seat and the second supporting seat push against the side wall of a mineral drive. The vibration of the mineral mining equipment with the structure in all directions, caused by the cutting-off operation, can be effectively inhibited.

The invention provides a dynamic and visualized weld shear stress fatigue test device, which includes a frame, one end of a test piece with a weld is fixed on the frame, and the other end is cantilevered; the cantilever ends of the test piece are respectively equipped with The dynamic system and stress control system that apply the load to the test piece; the mounting frame for installing the power system and the stress control system is installed on the outside of the test piece, and the other ends are respectively connected to the cantilever end of the test piece; an optical fiber detection system is installed on the test piece. There is a visual monitoring system on the outside of the weld of the parts, and the stress application system, stress control system, optical fiber detection system, and visual monitoring system are respectively connected to the PLC integrated system. The present invention also provides a method of using the above device. The device of the invention can make the weld be subjected to pure shear stress, and the PLC integrated system can dynamically observe the dynamic process of the shear stress change of the weld, which is more intuitive and convenient. The method of the invention is simple and refined in operation and meets the requirements of the welding seam shear stress fatigue test.

The invention provides a tower crane, a pull rod structure for a balance arm thereof and a mounting method for the structure. The pull rod structure for the balance arm comprises two pull rods which are crossed to form a certain angle, and an adaptor, wherein each pull rod is provided with a first end connected with the balance arm of the crane, and a second end connected with the tower top of the crane; the distance of the first ends of the two pull rods is greater than that of the second ends of the two pull rods; the adaptor is arranged on the second ends of the pull rods; the second ends of the pull rods are connected to two first connecting pieces arranged on the adaptor at intervals; and each first connecting piece is respectively provided with a first end connected with the adaptorand a second end connected with the tower top of the crane through a first pin roll. In the mounting method, the pull rod structure for the balance arm is adopted. The pull rod structure for the balance arm is stressed stably and reasonably, and is safe and quick to mount.

The invention discloses a liquid distributor comprising a mounting base, a push-pull valve, a rotary input member and a movable transmission member. The mounting base is used for being connected witha liquid container; the push-pull valve is arranged on the mounting base, is provided with a push-pull opening and closing structure and is in fluid communication to the liquid container; the rotary input member is rotatably kept on the mounting base; and the movable transmission member is kept on the mounting base in a linear reciprocated movement manner, is used for realizing power transmittingbetween the push-pull valve and the rotary input member to drive the push-pull valve to be pushed and pulled to be opened and closed, and the force input end of the rotary input member and the linearreciprocated movement of the movable transmission member are in coplanar distribution. The liquid distributor can eliminate the bending moment of the external force acting on the rotary input member,the bending and breaking risks of the rotary input member in the driving process are avoided, the structural safety is ensured, and reliable opening and closing of the liquid container and smooth output of fluid are realized.

The invention provides a plate hoisting frame structure for an automobile punch production line. The plate hoisting frame structure is mainly composed of a machine frame, guiding columns, counteraction wheel mechanisms, tightening mechanisms, a transmission mechanism, hoisting feet and the like. The hoisting feet sleeve the guiding columns to slide, and tightening wheels sleeve tightening seats sothat the tightness of chains can be adjusted. The plate hoisting frame structure is characterized in that pull rod seats are disposed on the upper portions of the hoisting feet, and the counteraction wheel mechanisms are disposed on the lower portions of the hoisting feet; pull rod sleeves which are connected with the pull rod seats through nuts are disposed on the pull rod seats; and pins are disposed on the pull rod sleeves. By means of the hoisting frame structure, pre-tightening of the two ends of the chains can be improved, and thus the problem that the two sides are asynchronous duringreversing due to insufficient pre-tightening force is avoided; and the pressing force of rollers and the guiding columns can be adjusted through the counteraction wheel mechanisms, the bending momentcaused when heavy objects are hoisted is effectively eliminated, and thus the hoisting motion is smoother. A corresponding mechanical feeding structure is configured, material grabbing is performed without a multi-degree-of-freedom robot, and the equipment input cost is greatly reduced.

The invention provides a novel beam and ram combined structure. A U-shaped ram and a beam are included. The beam is transversely arranged in a groove of the U-shaped ram. The U-shaped ram can transversely slide on the beam through two transverse sliding mechanisms symmetrically arranged on the two sides of the beam and vertically move along the beam through two vertical sliding mechanisms symmetrically arranged on the two sides of the beam. A main shaft box is arranged at the center position of the lower end of the U-shaped ram, so that a cantilever structure in the horizontal direction disappears, and influences on product machining precision from the cantilever structure are avoided. Additional bending moment exerted on the beam during product machining due to gravity center deflection of the main shaft box is eliminated. Two lead screws are used for driving a sliding saddle, and it can be guaranteed that the main shaft box part has better advantages in the aspect of rapid braking; meanwhile, stress of the main shaft box is relatively uniform, and the later machining precision is further improved; and two grating rulers are arranged on the side wall of the beam so that movement synchronism of the transverse sliding mechanisms is guaranteed.

A three-dimensional decoupling ultrasonic nanometer vibration table comprises a base. An ultrasonic vibration table is arranged on the base. The bottom of the ultrasonic vibration table and the base are in embedded connection. A first ultrasonic vibration drive mechanism and a second ultrasonic vibration drive mechanism which are used for carrying out X-direction and Y-direction ultrasonic vibration drive on a main vibration table of the ultrasonic vibration table are arranged in the ultrasonic vibration table in the direction X and the direction Y of the ultrasonic vibration table. A third ultrasonic vibration drive mechanism used for carrying out Z-direction ultrasonic vibration drive on the main vibration table of the ultrasonic vibration table is arranged at the bottom end of the ultrasonic vibration table in the direction Z of the ultrasonic vibration table. The first ultrasonic vibration drive mechanism, the second ultrasonic vibration drive mechanism and the third ultrasonic vibration drive mechanism are perpendicular to one another. The overall design is adopted by the ultrasonic vibration table; the structure is simple and compact; the first-order inherent frequency of theultrasonic vibration table can be effectively improved; and therefore the adjustable frequency range of auxiliary processing of the ultrasonic nanometer vibration table is guaranteed.

The invention discloses a nuclear motor performance verification device, which comprises a closed pressure container, namely LOCA furnace, a nuclear motor, a load, and an intermediate transmission assembly, wherein the LOCA furnace is used for simulating thermodynamics and chemical environment in the safety shell of a nuclear power plant and comprises a closed space formed by an upper plug, a lower plug and a barrel; the nuclear motor is fixedly arranged in the LOCA furnace; the load is arranged outside the LOCA furnace; and the intermediate transmission assembly is inserted into the barrel body of the LOCA furnace for connecting the nuclear motor and the load, and the nuclear motor drives the load to work. The device can verify the performance of the nuclear motor under specific thermotechnical and chemical conditions, and at the same time, reduce equipment damage and improve the utilization rate of equipment.

Various embodiments include a fuel injector assembly for an internal combustion engine comprising: an injector cup; a securing device to fasten the injector cup to the engine; wherein a first end of the injector cup remote from the fuel inlet port comprises an outwardly extending flange; a connector abutting the flange, wherein the injector cup and the fuel injector are secured together through the connector; and a fastening bracket supported on the flange, wherein the injector cup and the connector are secured through the fastening bracket by a fastening device. The fastening device comprises a U-shaped clip with a first arm disposed between a clamping face of the fastening device and the fastening bracket and a second arm generally parallel to the first arm disposed on the opposite side of the fastening bracket.

The invention relates to mining machinery, and particularly relates to a side support device for a coal mining machine, aiming to solve the problem that the existing support device can not effectively inhibit the back and forth vibration of the coal mining machine. In order to achieve the purpose, the side support device comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a first support base and a second support base, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on the first side of the coal mining machine, the third hydraulic cylinder and the fourth hydraulic cylinder are arranged on the second side of the coal mining machine, the first support base is connected with the outer side ends of the first hydraulic cylinder and the second hydraulic cylinder, and the second support base is connected with the outer side ends of the third hydraulic cylinder and the fourth hydraulic cylinder. When the side support device works, the first hydraulic cylinder, the second hydraulic cylinder and the first side of the coal mining machine can form a triangular structure, the third hydraulic cylinder, the fourth hydraulic cylinder and the second side of the coal mining machine can also form a triangular structure, and the first support base and the second support base are abutted against the side wall of a coal mine tunnel. The side support device with the structure can be used for effectively inhibiting the back and forth vibration and the left and right vibration of the coal mining machine due to cutting.

The invention provides a dynamic visualization welding joint shearing stress fatigue test device. The dynamic visualization welding joint shearing stress fatigue test device comprises a rack, one endof a test piece with a welding joint is fixed to the rack, and the other end of the test piece is cantilevered; the cantilevered end of the test piece is separately provided with a power system for applying loads in the axial direction of the welding joint and a stress regulation system; the outer side of the test piece is provided with a mounting frame for mounting the power system and the stressregulation system, one ends of the power system and the stress regulation system are connected with the mounting frame separately, and the other ends of the power system and the stress regulation system are connected with the cantilevered end of the test piece separately; an optical fiber detection system is mounted on the test piece, a visualization monitoring system is arranged at the outer side of the welding joint of the test piece, and a stress application system, the stress regulation system, the optical fiber detection system and the visualization monitoring system are connected to a PLC integration system separately. The invention further provides a method utilizing the device. By means of the device, the welding joint can be subjected to a pure shearing stress effect, and the PLCintegration system can dynamically observe the dynamic change process of the shearing stress of the welding joint more visually and conveniently. The method is easy to operate and refined and meets the requirement for the fatigue test of the shearing stress of the welding joint.

The invention discloses a novel sheet levelling mechanism with zero in-plane stress. A conventional levelling machine, particularly an eleven-roll levelling machine structure is improved, a levelling device capable of removing residual stress in a steel plate is designed, and the levelling device is particularly applicable to construction design of luxury cruise ships. The levelling device mainly comprises a levelling mechanism, a stress detection removing mechanism, a pressure control mechanism and an entire rack. According to the levelling device, in-plane stress of the steel plate is zero while leveling is achieved, namely, after levelling, in-plane bending moment of the steel plate is zero, horizontal single stress is zero, and section stress is zero, so that the levelled steel plate can be effectively prevented from warping and deforming due to residual stress inside, service life of the steel plate is prolonged, reliability of the steel plate is improved, and construction of the cruise ships is smoothly carried out.