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2005results about How to "Reduce running noise" patented technology

Differential pressure power pressure booster

The invention relates to a differential pressure power pressure booster, which is applied to the technical field of natural gas exploitation. The pressure of a high-pressure gas well is used for increasing the pressure of a low-pressure gas wall. A driving cylinder is oppositely connected with a compressing cylinder; a piston rod is arranged between the driving cylinder and the compressing cylinder; the left cavity of the driving cylinder is communicated with a high-pressure left gas inlet and outlet pipe, and the right cavity of the driving cylinder is communicated with a high-pressure right gas inlet and outlet pipe; the high-pressure left gas inlet and outlet pipe and the high-pressure right gas inlet and outlet pipe are connected with a two-position four-way change valve respectively; the two-position four-way change valve is connected with a high-pressure gas inlet pipe; the left cavity and the right cavity of the compressing cylinder are provided with a low-pressure gas inlet and a compressed low pressure gas outlet respectively; and a low-pressure gas inlet pipeline is fixed with a check valve, is connected with a low-pressure gas inlet pipe through the check valve, and is connected with an outlet pipe of the compressing cylinder through the check valve. The differential pressure power pressure booster has the advantages of exploiting natural gas of the low-pressure gas wall by using natural gas of the high-pressure gas well as a driving force under the condition of no external power source, saving a great amount of production cost, and effectively protecting strata pressures.
Owner:PETROCHINA CO LTD

Structure of motor stator core and cooling method for motor stator based on structure of motor stator core

The invention relates to a structure of a motor stator core and a cooling method for a motor stator based on the structure of the motor stator core. The structure is characterized in that the stator core is formed by splicing and combining stator yoke units and stator tooth units, wherein the quantities of the stator yoke units and the stator tooth units are the same, and are equal to the slot number Z1 of a stator; the stator yoke units and the stator tooth units are formed by laminating oriented silicon steel sheets; a stator yoke unit is connected between every two adjacent tooth units; the tooth units and the stator yoke units are in joggle joint; the silicon steel sheets of the stator yoke units are oriented circumferentially; and the silicon steel sheets of the stator tooth units are oriented radially. The cooling method is selected from one of air cooling, water cooling and oil cooling. The structure has the advantage that the motor has the characteristics of low ferromagnetic loss, high efficiency, low torque pulsation, low slot effect, low running noise, low wind resistance, high slot fullness rate of a stator winding, high utilization ratio of a silicon steel sheet material, suitability of the stator for automatic mass production and the like.
Owner:曹宇轩

Refrigerating system, refrigerator with same and control method thereof

The invention provides a refrigerating system, a refrigerator with the same and a control method thereof, wherein the refrigerating system comprises a compressor, a condenser, a switching unit, a refrigerating chamber capillary, a refrigerating chamber evaporator, a variable-temperature chamber capillary, a variable-temperature chamber evaporator and a freezing chamber evaporator, wherein an inlet of the condenser is connected with an outlet of the compressor; the switching unit is provided with an inlet, a first outlet and a second outlet, and the inlet of the switching unit is connected with the outlet of the condenser; the inlet of the refrigerating chamber evaporator is connected with the first outlet of the switching unit through the refrigerating chamber capillary; the inlet of the variable-temperature chamber evaporator is connected with the second outlet of the switching unit through the variable-temperature chamber capillary; and the inlet of the freezing chamber evaporator is connected with the outlet of the variable-temperature chamber evaporator and the outlet of the refrigerating chamber evaporator, and the outlet of the freezing chamber evaporator is connected with the inlet of the compressor. The refrigerator using the refrigerating system provided by the invention has the advantages of low noise, low energy consumption and low cost.
Owner:HEFEI MIDEA REFRIGERATOR CO LTD +1

Method and Control Apparatus for Controlling a High-Pressure Fuel Supply Pump

The present invention relates to a control apparatus 700 for controlling a high-pressure fuel supply pump 100, a computer program product comprising computer program code means configured to adapt a control apparatus 700 for controlling a high-pressure fuel supply pump 100, and a method for controlling a high-pressure fuel supply pump 100 configured to supply pressurized fuel to an internal combustion engine. The high-pressure fuel supply pump 100 comprises a normally-closed type solenoid actuated intake valve 110 configured to be opened or kept open by magnetic force. A control current IC of the solenoid actuated intake valve 110 is controlled for opening the solenoid actuated intake valve 110 by applying a control voltage VC to the solenoid actuated intake valve 110. Controlling a control current IC of the solenoid actuated intake valve 110 comprises increasing the control current IC to a first control current value IC1 for energizing the solenoid actuated intake valve 110. Controlling a control current IC of the solenoid actuated intake valve 110 for opening the solenoid actuated intake valve 110 according to the present invention further comprises reducing the control current IC from the first control current value IC1 to a second control current value IC2 being smaller than the first control current value IC1.
Owner:HITACHI LTD

Air port adjustable static pressure box with uniform outlet air

InactiveCN101988732AIncreased flow distanceMeet the requirements of the windDucting arrangementsNoise suppressionAir volumeMechanics
The invention discloses an air port adjustable static pressure box with uniform outlet air, which comprises a static pressure box shell, an air inlet, an air outlet and a silencing material adhered to the inner surface of the static pressure box shell, wherein a hole plate is arranged in the middle of the static pressure box shell and located above the air inlet, a partition plate is arranged below the hole plate, the space in the static pressure box shell is divided into a steady flow region, and an inlet air region and an outlet air region by the hole plate and the partition plate; and a groove is arranged at the bottom of the outlet air region of the static pressure box shell, a vertical flow guiding section is formed by extending a certain distance downwards along the groove, a slot is arranged at one side of the groove, and a regulating plate with a flow guiding arc section is installed on the slot and moves in the vertical flow guiding section through the depth extending into the slot to regulate outlet air amount of the air outlet. Through introducing the partition plate and the hole plate, the flowing distance of air is lengthened, the ratio of dynamical pressure converted to static pressure is increased, the uniformity of the outlet air is enhanced, the operation noise of equipment is reduced, the requirements for outlet air of the seam air inlet are better satisfied, and the application range of a static pressure box is widened.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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