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Patent
Sunward Intelligent Equipment Co. | Date: 2017-03-01

The invention disclose a combined driving sleeve of a drilling rig with a reliably fixed draw key, which comprises: a driving sleeve body (1), a draw key (2), a fixed stopper block (6), a movable stopper block (7), and bolts (8), the fixed stopper block (6) is fixed at one end of a groove of the driving sleeve body (1), while the movable stopper block (7) is fixed at the other end of the groove of the driving sleeve body (1) by means of a bolt (8), and the draw key (2) is fixed into the groove of the driving sleeve body (1) by means of the fixed stopper block (6) and the movable stopper block (7). The advantages thereof are: the draw key is reliably fixed and will not easily come loose; the method of mounting the draw key of the driving sleeve is simple and manufacturing costs are low; the operating space for replacing the draw key is large, and labor intensity is low; and the draw key is longitudinally symmetrical and can be inverted and interchanged.


Pan Z.,Central South University | He Q.,Central South University | He Q.,Sunward Intelligent Equipment Co. | Zhang X.,Central South University
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | Year: 2014

In order to investigate the high altitude performance of aircraft piston engines under composite supercharging conditions, the GT-POWER model of a composite supercharged system used on a certain aircraft piston engine was established to analyze its altitude characteristics under different supercharging conditions and its accuracy was validated. Based on the simulation results, it was concluded that when the engine was merely under level-one turbocharging condition, compared with the working condition on the ground, its maximum pressure in cylinder declined by 26 percent and the after-burning phenomenon became severe when it was operated at 5 000 meters above ground. In addition, the temperature in cylinder rose, resulting in apparent increase of thermal load, which ultimately leaded to power decrease of the engine. However, if the engine worked under composite supercharging condition, the pressure and power of the engine would recover in the high altitude, and the temperature in the cylinder approached to the level of ground working condition. When the engine was applied to a certain light aircraft, it could still maintain 80 percent of power even at the height of 7 600 meters, which verified that the composite supercharged system can satisfy the demand of high-altitude flight perfectly. ©, 2014, Editorial Board of Journal of HEU. All right reserved.


Pan Z.,Central South University | He Q.,Sunward Intelligent Equipment Co.
Engineering Failure Analysis | Year: 2015

Some cracks were found out on the oil pan and its strength reserve was reduced when one type of piston aviation kerosene engine was tested, so the high cycle fatigue analysis for oil pan was conducted. 3D model of the oil pan was established to analyze its force situation during the engine operation. The force situation of main bearings and bolts which was also put as boundary conditions when the ANSYS software was used in transient analysis for oil pan that was affected by alternation stress was obtained by GT-POWER and experiments, furthermore the fatigue safety factor of oil pan was calculated. The results showed that high cycle fatigue would occur around main bearings and the fatigue safety factor was under 1.2 when insert bearing caps were used by oil pan, while when the insert bearing caps were substituted with new ones the problem would disappear and the fatigue safety factor exceeded 2.0, which effectively improved the fatigue durability of oil pan. The bottom of the bolt head was mainly affected by compressive stress instead of alternating stress, so the high cycle fatigue around this area were not accounted for. © 2014 Elsevier Ltd.


Pan Z.J.,Central South University | He Q.H.,Sunward Intelligent Equipment Co. | Guo Y.,Sunward Intelligent Equipment Co. | Zhao Y.M.,Central South University | Yang J.,Sunward Intelligent Equipment Co.
Applied Mechanics and Materials | Year: 2014

The supercharger technology of piston aviation engine determines its flight capabilities, and then establishes a turbocharger simulation model of an aviation piston engine. After simulating the engine ground features and 5000-meter altitude characteristics, and comparing the efficiency of compressor and turbocharger in different environments, after the installation of mechanical supercharger, gas flow has been improved, the cylinder pressure decreased about 10% compared with ground condition and engine altitude state power is restored, even 20,000 feet Power restored to 80%, which can meet the needs of high-altitude flight. © (2014) Trans Tech Publications, Switzerland.


Patent
Sunward Intelligent Equipment Co. | Date: 2011-11-30

An energy-recovery generation system for a handling and carrying electric vehicle, comprising a hoisting cylinder (9), wherein an output pipeline of the hoisting cylinder (9) is provided with a pressure sensor unit (1) and a directional valve (2); the directional valve (2) is under the control of the pressure sensor unit (1); a first outlet of the directional valve (2) is connected to a tank (5) through a way of a multi-way valve (4) with an operating handle; the pressure oil, flowing out from a second outlet of the directional valve (2), passes through a pump (7) having an oil suction port capable of bearing pressure or a motor, and then passes through the multi-way valve (4), to finally flow back to the tank (5); the pump (7) having an oil suction port capable of bearing pressure or the motor drives an electric motor (16) to output electric energy; an electric energy output end of the electric motor (16) is connected to an energy storage device (20) through a converter (21).


Patent
Sunward Intelligent Equipment Co. | Date: 2015-04-01

Disclosed is a working device energy recovery system, including energy converters, a pressure energy retaining valve, a switchover valve, an energy collector, a logical control member, a main valve, a boom and corresponding connections. With the system, dropping potential energy of the boom can be controllably converted to hydraulic energy to be stored in the energy collector, and the potential energy can also be directly recycled to do work on the boom in a balancing manner, thereby reducing heat generated by a hydraulic system, reducing input power of a prime mover, and achieving the objective of saving energy.


Patent
Sunward Intelligent Equipment Co. | Date: 2011-11-30

The present invention relates to a telescopic crawler chassis and engineering machinery having the telescopic crawler chassis, comprising a left crawler frame, a right crawler frame and a base, further comprising at least one hollow left sliding beam and at least one right sliding beam. One end of the hollow left sliding beam is fixedly connected with the left crawler frame, and one end of the right sliding beam is fixedly connected with the right crawler frame. At least one hollow sliding seat is arranged on the base, one end of the hollow left sliding beam is movably inserted into an hollow sliding seat from the left end of the hollow sliding seat, and one end of the right sliding beam is movably inserted into an hollow sliding seat and also into the hollow part of the hollow left sliding beam from the right end of the hollow sliding seat. The change or conversion of the state of the engineering machinery can be more convenient, and the whole machine walks and operates more stably, safely and reliably.


An energy-recovery generation system for a handling and carrying electric vehicle, comprising a hoisting cylinder (9), wherein an output pipeline of the hoisting cylinder (9) is provided with a pressure sensor unit (1) and a directional valve (2); the directional valve (2) is under the control of the pressure sensor unit (1); a first outlet of the directional valve (2) is connected to a tank (5) through a way of a multi-way valve (4) with an operating handle; the pressure oil, flowing out from a second outlet of the directional valve (2), passes through a pump (7) having an oil suction port capable of bearing pressure or a motor, and then passes through the multi-way valve (4), to finally flow back to the tank (5); the pump (7) having an oil suction port capable of bearing pressure or the motor drives an electric motor (16) to output electric energy; an electric energy output end of the electric motor (16) is connected to an energy storage device (20) through a converter (21).


Patent
Sunward Intelligent Equipment Co. | Date: 2013-08-07

A combined down-the-hole hammer comprises a coupler (1), a bracket (3), plurality of impactors (4), a gas distributor (2). The coupler is configured to connect with a drill rod (5) and is internally provided with a first gas passage (10). plurality of impactors (4) are installed on the bracket (3), each of which is individually provided with a second gas passage (40), and an impact drill bit (45) of each of the impactors (4) can rotate around the axis per se. The gas distributor (2) is provided between the coupler (1) and the bracket (3). The gas distributor (2) is provided with a gas collection chamber (21) communicated with the fist gas passage (10) and a plurality of gas-distributing paths (22) communicating the gas collection chamber (21) with the second gas passage of each of the impactors (4). The combined down-the-hole hammer has the following advantages: low cost, rational structure, easy maintenance, convenient assembly/disassembly, reliable seal, and high efficiency of energy utilization and boring.


Patent
Sunward Intelligent Equipment Co. | Date: 2013-05-29

A main control valve for a hydraulic excavator and a hydraulic excavator having the same. The hydraulic excavator main control valve comprises: a straight travel valve unit (1), a rotary unit (2), a dozer blade unit (3), a boom 2\hammer unit (5), an arm 1 unit (6), a travel left unit (7), an oil inlet unit, a travel right unit (8), a boom 1 unit (9), a bucket unit (10), an arm 2 unit (11), and an oil return passage (T2). The main control valve for hydraulic excavator is oil supplied by three pumps (P1, P2, P3) comprising a first pump (P1), a second pump (P2), and a third pump (P3). The first pump (P1) and the second pump (P2) are two variable pumps having the same displacement, and the third pump is standalone. The three pumps (P1, P2, P3) are under total power control, and the rated pressure of the third pump (P3) is less than the rated pressure of the first pump (P1) and that of the second pump (P2). The main control valve for hydraulic excavator further comprises a level-mode oil supply circuit, though which the first pump (P1), the second pump (P2) and third pump (P3) supply oil confluently to the arm cylinder of the hydraulic excavator. The main control valve for hydraulic excavator makes single-movements more rapid, and oil flow distribution is done appropriately during composite-movements. The valve also has the advantages of high work efficiency when in a level position and energy-saving when excavating.

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