8results about How to "Improve testing capabilities" patented technology

The invention discloses a ground test hydrogen-oxygen rocket engine mixing ratio control system which comprises a liquid hydrogen storage tank, a hydrogen cavitation pipe, a liquid oxygen storage tank, an oxygen cavitation pipe, a combustion device, a gas nozzle, a liquid hydrogen storage tank pressure control system and a liquid oxygen storage tank pressure control system. Wherein the liquid hydrogen storage tank is connected with the liquid hydrogen storage tank pressure control system through a pipeline; the liquid oxygen storage tank is connected with the liquid oxygen storage tank pressure control system through a pipeline; the liquid hydrogen storage tank is connected with an inlet of the hydrogen cavitation pipe through a pipeline, and an outlet of the hydrogen cavitation pipe is connected with a hydrogen inlet of the combustion device through a pipeline; the liquid oxygen storage box is connected with an inlet of the oxygen cavitation pipe through a pipeline, and an outlet of the oxygen cavitation pipe is connected with an oxygen inlet of the combustion device through a pipeline. An outlet of the combustion device is connected with an inlet of the gas nozzle through a pipeline, and an outlet of the gas nozzle directly discharges gas outwards. The purposes of controlling the mixing ratio and prolonging the test duration are achieved, meanwhile, the safety of the engine and the test device is guaranteed, and the test cost is reduced.

This invention discloses a salt spray testing device and method for curtain wall profiles, belonging to the field of curtain wall profile testing. The salt spray testing device for curtain wall profiles includes an annular platform and an annular groove disposed at the upper end of the annular platform. An annular plate is rotatably connected to the upper end of the annular groove. A salt spray generator is fixedly installed at the upper end of the annular plate, and the output end of the salt spray generator extends into the annular groove. A driving part for driving the annular plate to rotate is provided on the annular platform. Multiple circumferentially distributed circular holes are disposed at the upper end of the annular plate, and a turntable is rotatably connected to each of the multiple circular holes. Each of the multiple turntables has an inclined insertion hole. This invention allows the gas in the salt spray environment to fully contact the surface of the curtain wall profile, ensuring the test effect. Furthermore, it allows the curtain wall profile to simulate being subjected to salt spray blowing from different directions, thus making the test process more accurate.

The utility model relates to the technical field of detection tools, and discloses a new energy automobile power battery pack stiffening beam anti-collision performance detection mechanism which comprises a rack, a tension meter is arranged on an upper cross beam of the rack, a clamping jaw is arranged on each of the tension meter and a bottom plate of the rack, and the two clamping jaws clamp the two ends of an anti-collision beam; a transverse notch, a vertical notch and an inclined notch are respectively formed in a clamping block of the clamping jaw, a strain gauge is pasted on the anti-collision beam, and the strain gauge is connected with a Wheatstone bridge circuit board; the Wheatstone bridge circuit board is installed on the front face of the rack and covered with the protective cover. The Wheatstone bridge circuit board is electrically connected with the voltmeter, and the voltmeter is installed on the rack; an impact structure facing the anti-collision beam is installed on the machine frame. According to the utility model, anti-collision simulation tests of different directions and inclination angles are carried out on the anti-collision beam, the flexibility of the detection mechanism is increased, and the test effect of the anti-collision beam of the battery pack is improved.

The utility model relates to the technical field of tempered glass production, in particular to a tempered glass impact resistance test device which comprises a test frame, a movable motor is installed on the front face of the test frame, an adjusting groove and a test groove are formed in the top of the test frame, and the top of the test frame is movably connected with a sliding frame through the adjusting groove. A lifting frame is fixedly connected to the top of the sliding frame, a lifting motor is installed at the top of the lifting frame, a lifting groove is formed in one side of the sliding frame, a lifting sliding frame is movably connected to the outer side of the sliding frame through the lifting groove, an adjusting frame is fixedly connected to the front face of the lifting sliding frame, and an adjusting motor is installed in the adjusting frame. An adjusting gear is fixedly connected to the driving end of the adjusting motor, a movable groove is formed in one side of the adjusting frame, and an adjusting arm is movably connected to the inner side of the movable groove. According to the utility model, the flexibility of the toughened glass impact resistance test device is improved, so that the test device can adjust the test position according to the detection requirement, thereby improving the test effect.

This utility model relates to a perfluorohexanone fire extinguishing device test platform applied in the field of materials testing technology. It includes a workbench with a cross-shaped receiving groove carved into its upper end. A positioning plate is fixedly connected to the middle of the receiving groove, and adjusting seats are fixedly connected to all four ends of the positioning plate. Adjusting plates are rotatably connected to the adjusting seats. Four adjusting holes are carved into the inner bottom wall of the receiving groove. Four support legs are fixedly connected to the lower end of the workbench, and cylinders are rotatably connected to the support legs. The end of the cylinder furthest from the support leg passes through one of the adjusting holes and is rotatably connected to one of the adjusting plates. A fireproof pad is fixedly connected to the upper ends of the positioning plate and the multiple adjusting plates. Through the coordinated operation of the hinged adjusting plates and the lifting sealing cover, the test space can be flexibly switched between closed, semi-closed, and fully open states, enabling the fire extinguishing test to simulate more diverse actual fire scenarios, thereby effectively improving the test results and obtaining more comprehensive test results.

The utility model discloses a kind of pre-tightening devices for conical roller bearing testing machine shafting installation, the outer part of right side stepped of main shaft is successively sleeved with spacer sleeve one and spacer sleeve two, the outer periphery of spacer sleeve one is sleeved with conical roller bearing one, the outer periphery of spacer sleeve two is sleeved with conical roller bearing two, the outer part of conical roller bearing one is equipped with loading wheel one, the outer part of conical roller bearing two is equipped with loading wheel two;Along the circumferential end surface between loading wheel one and loading wheel two, pre-tightening mechanism is evenly arranged;The pre-tightening device is simple and compact in structure, the trend of loading wheel one and loading wheel two sliding to inside is avoided by the support of pre-tightening mechanism, using screw rod, screw sleeve and pressure sensor, the pre-tightening force between loading wheel one and loading wheel two is accurately adjusted, position state of a pair of conical roller bearing inner and outer rings is adjusted simultaneously, satisfy the test requirement of large-scale various specifications bearing, improve bearing test installation efficiency and the overall test performance of testing machine.

This invention discloses an elevator control method based on duty cycle, comprising the following steps: the elevator initiates random operation according to a set number of runs and a duty cycle; after the elevator completes one running cycle, the actual duty cycle of the elevator is calculated and compared with a set value. If the actual duty cycle is not greater than the set value, the next running cycle is directly initiated; if the actual duty cycle is greater than the set value, the elevator's delay time is calculated and the elevator is controlled to standby for the specified delay time before the next running cycle is initiated. After completing the set number of running cycles according to the above steps, the random operation ends. This invention can adjust the duty cycle of the elevator during random operation, thereby improving the testing effect of the elevator and preventing abnormal wear and tear.

This invention discloses a large off-axis maneuvering separation CTS test system. The front / rear end of the strain balance is connected to the belly support assembly, which is connected to a six-degree-of-freedom motion mechanism via a rolling motion mechanism. One end of the L-shaped front belly support rod of the belly support assembly is detachably connected to a connecting section, and the connecting section is detachably connected to the rear belly support rod. The other end of the L-shaped front belly support rod extends into the belly of the suspended object model and is connected to the front / rear end of the strain balance. The rear belly support rod is connected to the six-degree-of-freedom motion mechanism via a rolling motion mechanism. By changing and adjusting the connecting section, the CTS test system can be configured as a belly support system without pre-biasing and a belly support system with pre-biasing. The belly support system without pre-biasing is used for CTS tests in the angle-of-attack range of 0° to -60° or -120° to -180°. In the belly support system with pre-biasing, the suspended object model is first set to a pre-biased angle of attack during the CTS test, and the belly support system with pre-biasing is used for CTS tests in the angle-of-attack range of -60° to -120°. This invention provides a test method for capturing the separation trajectory of a suspended object during large off-axis maneuvers from 0 to -180°.