61results about How to "Low starting resistance" patented technology

The invention discloses a control method of an electronic expansion valve of an air conditioner. The maximum opening of the electronic expansion valve is 480 pulses. The control method comprises the steps that after a starting instruction is received, a control system of the air conditioner opens the electronic expansion valve to the maximum opening or to more than 70% of the maximum opening, and then a compressor is started; after the compressor is started and operates for a period of time till operating stably, the opening of the electronic expansion valve is adjusted to the target operating opening; an air conditioner system operates normally; when a shutting-down instruction is received, the control system of the air conditioner opens the electronic expansion valve completely. According to the technical scheme, due to the fact that the electronic expansion valve is completely opened in the starting process, the coolant pressure difference between the two ends of a system throttling device can be reduced, the starting resistance of the compressor can be reduced, and the starting current can be reduced. The service life of system elements can be prolonged. A small-capacitance capacitor can be used, and therefore the system cost can be lowered, and impact on a power grid and other household appliances can be reduced.

This invention is a divisional application, which application number is 200410075501.2. It relates to a damper. It includes cylinder body and moving body. At least parts of the moving body are in the cylinder body. At least one axial extended chamber is arranged in the cylinder body. The chamber is filled with viscous damping liquid and forms the damping chamber. The moving body is composed of moving blades that are arranged inside of the damping chamber. The moving blades and damping chamber wall form shearing cavity. The thickness dimension of the shearing cavity is far less than its axial dimension. Axial guiding device is arranged between the cylinder body and moving body. This invention is simple and reliable. It has no precise components. Thus, its cost is low. This invention also has long life span and can be used after examining and repairing.

The invention discloses a control method for the pressure balance of a heat pump air conditioner, which can enhance the control reliability of the pressure balance of an air-conditioning system. In the control method for the pressure balance of the heat pump air conditioner, a coil is switched on or switched off by a controller when a compressor works in a refrigeration process; when the compressor works in a heating process, the controller enables the switching-on / switching-off state of the coil to be opposite to that of the coil when the compressor carries out the refrigeration operation; when the compressor stops in the refrigeration process, the controller enables the switching-on / switching-off state of the coil to be same as the switching-on / switching-off state of the coil when the compressor works in the heating process; and when the compressor stops in the heating process, the controller enables the switching-on / switching-off state of the coil to be same as the switching-on / switching-off state of the coil when the compressor works in the refrigeration process. The flow directions of high-pressure and low-pressure cooling media in the system are switched by controlling an electromagnetic cross joint reversing valve used by the heat pump air conditioner per se, the pressure of the high-pressure and low-pressure cooling media of the air-conditioning system is effectively balanced in the stop / start process of the compressor, and the invention is especially suitable for popularization and application on the heat pump air conditioner.

The invention provides an automatic decompression starter, which relates to the field of electric starting technology of an internal-combustion engine and mainly comprises a power switch, an electromagnet and a starter. The automatic decompression starter is characterized in that: the power switch consists of a moving contact and two static contacts; an iron core of the electromagnet is in clearance fit with a shifting fork and is fixedly connected with a pulling wire lined with an internal-combustion engine decompression mechanism; both two static contacts of the power switch are connected with the electromagnet and a power connection of the starter respectively; and both switch-on and switch-off of a power supply of the starter are later than those of the electromagnet. The starter works in the state of decompression so that the starting failures are greatly reduced and the service life is prolonged.

The invention discloses a draught fan downwind starting control method and device and an air conditioning unit. According to the draught fan downwind starting control method and device, the wind direction can be detected, a draught fan is controlled to steer according to the wind direction, the draught fan is enabled to run in a downwind mode, and the air outlet direction of the draught fan is thesame as the air direction. The draught fan downwind starting control method comprises step S1, detecting whether a draught fan start-up signal exists is conducted, if no start-up signals exist, stepS2 is executed, and if the start-up signal exists, the step S3 is executed; step S2, a draught fan driving signal is closed and cut, and the step S1 is executed circularly; step S3, the state of the draught fan is detected, and steering of the draught fan is judged; if the draught fan is downwind, the step S4 is executed, and if the draught fan is upwind, the step S5 is executed; step S4, the draught fan is started to run in a downwind mode, and meanwhile, the step S1 is executed; and step S5, reverse-rotation of the draught fan is conducted, and step S4 is executed. According to the method, starting resistance and starting currents of the draught fan are small, the operation energy consumption is low, especially the wind energy can be converted into electric energy under the condition that wind power is large, and the electric energy loss is greatly reduced.

The invention relates to a damper, comprising a cylinder body and a moving body; the moving body is at least positioned in the cylinder body partially, the cylinder body is internally provided with at least one chamber extending along the axial direction, and the chamber is filled with viscous damping liquid so as to a damping chamber; the damper is characterized in that the moving body consists of moving blades arranged in the damping chamber; the moving blades and the wall of the damping chamber form a shearing cavity; the thickness of the shearing cavity is far less than the axial dimension thereof; an elastic compensating body is arranged in the damping chamber or a compensating chamber communicated with the damping chamber. The damper is characterized by soft damping characteristics, simple structure, low manufacturing cost, stable performance, long service life, easy regeneration and environmental protection.

The invention discloses an auxiliary device for low-pressure and low-temperature starting of a diesel engine. The auxiliary device comprises a fuel heater, a lithium ion storage battery module, a starter, a water inflow / return valve, a water temperature sensor and a control unit; the fuel heater is provided with a water outlet pipeline; the water outlet pipeline is provided with the water temperature sensor and a first water inflow / return valve and connected with the water inlet of an engine oil pan water jacket; the water outlet of the engine oil pan water jacket is connected with a water return pipeline; the water return pipeline is provided with a second water inflow / return valve and a water pump; the control unit is connected with the water temperature sensor; the lithium ion storage battery module, the starter and a motor are connected in sequence. The auxiliary device realizes hot starting of the diesel engine under low pressure and low temperature conditions, reduces the abrasion of the diesel engine during starting and prolongs the service life of the diesel engine.

The invention discloses application for machining a shaft sleeve by using high-strength low-expansion zinc-base abrasion-resistant alloy. Raw materials for machining the shaft sleeve comprise by weight: 55-65% of zinc, 20-30% of aluminum, 10-15% of intermediate alloy aluminum and 1-2% of cobalt aluminum. A method for machining the shaft sleeve comprises the following steps of: melting the raw materials, conducting casting molding through a die, and machining to obtain the high-strength low-expansion zinc-base abrasion-resistant alloy shaft sleeve. The application for machining the shaft sleeve by using the high-strength low-expansion zinc-base abrasion-resistant alloy changes production materials of the traditional shaft sleeve, reduces proportion of the traditional production material to be 4.8, is better than bronze in wear-resisting property, tensile strength and compression strength, is small in starting resistance, not apt to abrade and drop scrapes and good in oil soaking performance of the materials, and can form a protective oil film on a work face. The application enables the shaft sleeve to be reliable in work, good in stability and high in accuracy, and the high-strength low-expansion zinc-base abrasion-resistant alloy is the preferential material for machining the shaft sleeve at present.

The invention relates to a mechanical sealing device. The sealing device comprises a positioning sleeve, a moving friction ring, a fixed friction ring and a stop ring, wherein the positioning sleeve comprises a positioning sleeve body, an outer mounting surface, an inner mounting surface which is used for mounting a roll shaft to be sealed in a sleeving manner, and a first sealing groove which isformed in the inner mounting surface, wherein a first sealing ring is assembled in the first sealing groove; the moving friction ring comprises an assembling surface which forms a second sealing groove with the outer mounting surface of the positioning sleeve, and a first moving sealing surface which is protruded in the axial direction of a main body of the moving friction ring; a second sealing ring is arranged in the second sealing groove; the fixed friction ring comprises a first end of a second moving sealing surface corresponding to the first moving sealing surface of the moving frictionring and a second end which is provided with a permanent magnet ring; and the stop ring comprises a permanent magnet repulsion ring corresponding to the second end of the fixed friction ring, so thata magnetic levitation repulsion pair is formed between the fixed friction ring and the stop ring. By adopting the mechanical sealing device and application thereof provided by the invention, the structure is refined; and the convenience in installation, regulation, use and maintenance is improved.

The invention discloses an engine lubricating oil supply system which comprises a lubricating oil tank, an oil supply pump and an oil return pump. The system is characterized by further comprising anoil drawing pump arranged before the oil supply pump. The flow amount of the oil drawing pump is 50%-60% of that of the oil supply pump. Lubricating oil of the lubricating oil tank is supplied to an engine after being pressurized through the oil drawing pump and the oil supply pump, and drawn back through the oil return pump after lubricating and cooling a gear, a bearing and the like. A part of return oil of the engine enters the oil supply pump along a first flowing way 1 to continue circulating, a part of the return oil flows back to the lubricating oil tank along a second flowing way 2, the flow amount of the first flowing way 1 and the flow amount of the second flowing way 2 are adjusted through a flow limiting nozzle arranged on the second flowing way 2, and it is ensured that the flow amount of the second flowing way 2 accounts for 80%-90% of the total flow amount of the return oil. According to the engine lubricating oil supply system, the two-stage pump is adopted for pressurizing the lubricating oil, most return oil of the engine does not flow into the lubricating oil tank, and directly enters the oil supply pump to continue circulating, the circulating route is short, preheating of the lubricating oil is benefitted, and starting resistance of the lubricating system is reduced.

The invention relates to a rope-swing-type self-resetting anti-drawing seismic isolation bearing. The rope-swing-type self-resetting anti-drawing seismic isolation bearing comprises a U-shaped bearing and a bearing upper plate. The U-shaped bearing and the bearing upper plate are connected through a floating seismic isolation device. According to the rope-swing-type self-resetting anti-drawing seismic isolation bearing, the seismic isolation bearing can isolate seismic oscillation transmitted from different directions through rolling of the roller along a rope and swing of the rope, seismic isolation protection can be provided for an upper portion structure, and damage of the structure is reduced and even avoided; the seismic isolation bearing isolates an earthquake through rolling of the roller along the rope and swing of the rope, and because the starting resistance of rolling and swinging is obviously reduced compared with traditional rubber or a sliding bearing, the seismic isolation efficiency is greatly improved; and the seismic isolation bearing isolates the earthquake through rolling of the roller along the rope and swing of the rope, through rolling of the roller along the rope and free swinging of the rope, the upper portion of the bearing can finally go back to an initial position of the bearing, and the rope-swing-type self-resetting anti-drawing seismic isolation bearing has a good self-resetting function.

The invention discloses a sand table with a height regulation function and used for psychological education. The sand table comprises a mechanical control box, and a motor is fixedly installed in themechanical control box; the top of a threaded vertical rod is fixedly connected with a damping mechanism, and an inner cavity of the motor is fixedly connected with a rotating shaft; the top of the motor is fixedly connected with a motor brake, and the top of the rotating shaft is fixedly connected with a rotating wheel; a rotating chassis is arranged around the periphery of the rotating wheel ina sleeving mode, and a wheel groove is formed in an inner cavity of the rotating chassis; the left side of the rotating chassis is fixedly connected with a first mounting flange, and the left side ofthe first mounting flange is fixedly connected with a first support rod; the top of the first support rod is fixedly connected with a first tray, and the right side of the rotating chassis is fixedlyconnected with a second mounting flange; the right side of the second mounting flange is fixedly connected with a second support rod, and the top of the tray is fixedly connected with a sand table body; and a drying layer is arranged on the inner wall of the sand table body.

The invention relates to a homogenizer transmission case structure comprising a case. An arc bearing surface is arranged in the middle, corresponding to a crankshaft arranged on the case, of the case, and the bearing surface is arranged opposite to the direction that the crankshaft bears piston force. Design of the intermediate support of the crankshaft is simplified, the arc bearing surface is arranged corresponding to the crankshaft and arranged at the position opposite to the direction of the piston force, the crankshaft drives a piston to move, and the crankshaft bears acting force of the piston. The bearing surface is arranged corresponding to the direction of the piston force borne by the crankshaft, enough bearing reaction can be provided for the crankshaft, a half structure is omitted, heat generated by friction in the working process of the intermediate portion, namely a sliding bearing, of the crankshaft is reduced, starting resistance is reduced, convenience is brought to processing, and cost is lowered effectively.

The invention discloses a planet reductor brake, and belongs to the technical field of planet reductors. The brake comprises a brake shell, wherein a piston is arranged in the brake shell, a seal cavity is arranged between the piston and the brake shell, and the joint of a piston excircle and an brake shell inner wall is provided with a seal groove; and a seal ring is arranged in the seal groove, the seal ring is an H-shaped seal ring, the radial inner and outer circles of the seal ring are respectively provided with a groove, the axial two sides of the seal ring are flat surfaces, and the sections of the axial two sides of the seal ring are H-shaped. The brake adopting the H-shaped seal ring provided by the invention has the beneficial effects of smaller frictional resistance and starting resistance and good sealing effect; the non-circular section can prevent rolling during the reciprocating motion, and the wearability is good; and by using the brake provided by the invention, the problem of oil spilling because of insufficient radial compression quantity caused by large transformation of the existing star seal ring can be solved, thereby improving the brake sealing effect and the whole brake performance.

The invention discloses application of a high-toughness low-expansion zinc-based wear-resisting alloy for production of a bearing cage. The alloy comprises, by weight, 55-65% of zinc, 20-30% of aluminum, 10-15% of intermediate alloy aluminum and 1-2% of aluminum cobalt. A method for producing the bearing cage comprises that materials are smelted, cast and molded by a mold and subjected to finish machining, and then the high-toughness low-expansion zinc-based wear-resisting alloy bearing cage is produced. According to the application of the high-toughness low-expansion zinc-based wear-resisting alloy for the production of the bearing cage, production materials and production processes of traditional bearing cages are changed, the specific gravity of the bearing cage is reduced to 4.8, the wearing resistance and the strength of the bearing cage are better than those of lead bronze, the starting resistance is low, the bearing cage is not easy to wear, scraps are not easy to fall, the bearing cage are good in material oil immersion performance, and a layer of protective oil film can be formed on every working surface. According to the application, the alloy is low in starting resistance, free from scrap falling during operation, reliable in operation, good in stability and high in working precision, so that the alloy is the preferred application material for current processing of the bearing cage.

The invention relates to the technical field of engine equipment with an engine oil preheating function, in particular to an engine oil preheating system, a control method thereof and an engine. The engine oil preheating system comprises a thermostat, a three-way solenoid valve, an engine oil cooler, an engine oil temperature sensor and a controller; the two water inlet ends of the three-way solenoid valve communicate with the water outlet end of the thermostat and a hot water supplying device correspondingly, and the water outlet end of the three-way solenoid valve communicates with the engine oil cooler; the engine oil temperature sensor is used for sensing the temperature of engine oil in the engine and electrically connected with the controller, and the controller is further connectedwith the three-way solenoid valve. The control method is applied to the engine oil preheating system, and the engine comprises the engine oil preheating system. According to the engine oil preheatingsystem, the control method thereof and the engine, during cold starting of the engine, the starting resistance is small, and fuel consumption and the emission load are low.

The invention relates to an intelligent side-in type stirrer capable of replacing a shaft seal with raw materials. The intelligent side-in type stirrer comprises a motor (1), a speed reducer (2), a rack (3), a mechanical seal (4), an installation flange (5), a stirring shaft (6), a stirrer (7), a stop device (8) and a stabilizing device (9), wherein a distribution ring (53) is connected with an external water source through a flushing water channel (54) designed on the installation flange (5); an open type cut-through kettle interior is formed at a position (14) between a friction end surfaceand the distribution ring (53); a PTC (Positive Temperature Coefficient) thermosensitive protection device guided-in thermistor (12) is arranged at a position, close to the friction end surface, on the inner side of a mechanical sealing static ring (41); the PTC thermosensitive protection device can be connected to an alarm control device. The intelligent side-in type stirrer provided by the invention can be used for replacing the shaft seal with raw materials, maintaining mechanical sealing, diluting a fluid on the friction end surface so as to be good for cooling and lubricating, and monitoring the temperature situation at the position so as to conveniently and timely handle the situation at the same time.

The invention discloses a loop heat pipe capable of being rapidly started. The loop heat pipe capable of being rapidly started comprises an evaporator, a condenser, a steam pipeline and a liquid pipeline, wherein the evaporator and the condenser are connected through the steam pipeline and the liquid pipeline. A PTFE film is arranged at an inlet, where the steam pipeline enters the condenser, in the tail end of the steam pipeline, and thus, liquid working media are prevented from entering the steam pipeline. According to the loop heat pipe capable of being rapidly started, the start time of the loop heat pipe is shortened, and meanwhile, it is ensured that the loop heat pipe can be smoothly started under a small heat load condition.

The invention discloses a gear selecting and shifting hydraulic soft shaft. The gear selecting and shifting hydraulic soft shaft comprises a hydraulic cylinder shell. A push rod is arranged on one side of the hydraulic cylinder shell. One end of the push rod extends into the hydraulic cylinder shell. A piston is arranged in the hydraulic cylinder shell and connected with the push rod. A groove is formed in the middle portion of the piston. A first seal ring is arranged between inner walls of the groove. A second seal ring is arranged on the side, away from the piston, of the first seal ring. The other side of the hydraulic cylinder shell is connected with a shaft body. A gas bleed screw is arranged on the side, close to the shaft body, on the hydraulic cylinder shell. The gear selecting and shifting hydraulic soft shaft is reasonable in design, gas in hydraulic pipelines can be drawn out through a gas bleed screw hole, and liquid is prevented from flowing out; the gear selecting and shifting hydraulic soft shaft has the beneficial effects of being low in start resistance, good in sealing effect, small in sliding resistance, high in movement speed and the like; and the idle stroke generated by the size interval between steel wire structures frequently used at present is eliminated, and therefore the stroke efficiency is improved, the gear shifting hand feeling is improved, and the gear shifting comfort is improved.

A microcomputer controlled variable compression ratio and variable air distribution phase is disclosed, and can increase the thermal efficiency, volume efficiency and mechanical efficiency of engine, save fuel, decrease the preheat time and prevent overhigh cooling temp. and decrease the abrasion of brake. The acceleration position sensor and other sensors output the electric signals to the microcomputer for controlling the controllers of air inlet and outlet valves. When corking conditions of 4-stroke engine change, the air inlet and outlet valves can be controlled at correct positions of crankshaft.

The invention belongs to the field of agricultural machinery and relates to a transmission and control system of a self-propelled silage combine harvester. The transmission and control system of a self-propelled silage combine harvester comprises an engine, a power output device, a normally closed walking transmission device, a normally open main transmission device, a hydraulic system and an electric control system. A power device is arranged on a frame, the power output device is arranged on a power output side of the power device, power is transmitted to the normally closed walking transmission device and the normally open main transmission device from the power device, the normally closed walking transmission device transmits the power transmitted by the power output device to a walking system, the normally open main transmission device transmits the power transmitted by the power output device to all working parts, and the hydraulic system and the electric control system control operation of a transmission system and functional parts. The transmission and control system has the advantages that the self-propelled silage combine harvester can be suitable for operation in mountains and hills, and has high transmission efficiency, small occupied space and high reliability.

The invention discloses a starting method for reversed positioning and pressure reduction of an engine. The starting method comprises the steps that firstly, a motor is driven through a control mechanism to rotate forwards, and the engine is made to rotate forwards to a restoration point of a pressure reduction mechanism; and secondly, the motor is driven by the control mechanism to rotate reversely, reversed positioning is conducted on the engine, and the pressure reduction mechanism of the engine is made to enter the position between the pressure reduction state starting point and a pressure reduction state ending point. By the adoption of the starting method for reversed positioning and pressure reduction of the engine, the engine can be made in the pressure reduction state before being started, and the starting load of the engine is reduced, so that a response can be given to the starting operation rapidly to make a vehicle be started, and the starting performance is improved.

The invention relates to a bulk cargo conveying tank reconstructed through a container. The bulk cargo conveying tank comprises a container body which comprises a container top, a container bottom and a container door; and the bulk cargo conveying tank is characterized in that the container bottom is a W-shaped container bottom, the two downwards-sinking portions of the W-shaped container bottom are each provided with a horizontal packing auger, and a flow guide plate is arranged above each horizontal packing auger. Each flow guide plate is divided into a plurality of flow guide sheets in the longitudinal direction, and a gap is reserved between every two adjacent flow guide sheets; and the tail ends of the two sides of each flow guide sheet are connected with the W-shaped container bottom through flow guide plate adjusting plates, and gaps are reserved between the bottoms of the flow guide plate adjusting plates and the W-shaped container bottom. The container top is partially or wholly cut off, and a grid type feeding opening is horizontally formed in the position below the cut-off container top. By means of the reconstructed container, bulk cargoes can be loaded from the upper portion of the container and transversely unloaded through the horizontal packing augers, and loading and unloading are convenient and rapid; in addition, the container can well meet the requirement for conveying the bulk cargoes in a large batch; and the beneficial effects of being simple in operation, safe, efficient and the like are achieved.

The invention discloses an engine air inlet and crankcase preheating combined system. The engine air inlet and crankcase preheating combined system comprises a controller, a cold air preheating assembly and pipelines for communication, wherein outside air is heated through the cold air preheating assembly and then input into an engine air inlet pipe and a crankcase air inlet channel in a crankcasethrough the two parallel pipelines; an air heating device is electrically connected with the controller; and the controller is connected with a storage battery on a vehicle to achieve power supply. The engine air inlet and crankcase preheating combined system is reasonable in structural layout, pipeline connection is smooth, and efficient preheating of engine air inlet and the crankcase is achieved through the design of a heat exchanger; and when an engine is started at a low temperature, the friction resistance between engine moving parts is reduced while the engine air inlet temperature isincreased, the initial starting torque is reduced, and the engine can be rapidly started.

Disclosed is an upper transmission system of engineering machinery. The upper transmission system comprises an upper engine (1), a clutch (2), and a transfer case (3); the clutch (2) is installed on a rear end surface of a flywheel (11) of the upper engine (1), and a power input shaft of the transfer case (3) is connected to the clutch (2) by means of driving; when the upper transmission system is used, in a severely cold environment, if it is difficult to start the upper engine (1), the clutch (2) may be operated to separate from the upper engine (1), to disconnect the upper engine (1) from the transfer case (3), so that the upper engine (1) disengages from loads such as the transfer case (3). In this way, start-up resistance of the upper engine (1) can be reduced, so that the upper engine (1) is started in time and normally. After the upper engine (1) is started, the clutch (2) can be operated to be combined with the upper engine (1), so that the upper engine (1) transmits power to components such as the transfer case (3), to implement normal operation of the whole machine. Also disclosed is engineering machinery having the upper transmission system.

The invention discloses a turntable assembly for a three-dimensional garage and relates to the field of three-dimensional garages. It includes a turntable device, a car frame and a centering device for correcting the alignment of the vehicle; the car frame is installed in the middle of the turntable device, and is driven by the turntable device to rotate horizontally; the centering device is installed on the car frame; the centering device It includes two front wheel pressure wheel assemblies, two rear wheel pressure wheel assemblies and two driving mechanisms; the two front wheel pressure wheel assemblies are symmetrically arranged at the front wheel brackets on both sides, and the two rear wheel pressure wheel assemblies are symmetrically arranged on both sides. side rear wheel bracket; one of the driving mechanisms is connected between the two front wheel pinch wheel assemblies to drive the front wheel pinch wheel assemblies on both sides; the other drive mechanism is connected between the two rear wheel pinch wheel assemblies to Drives the rear wheel pinch assembly on both sides. The present invention can not only be used to reverse the direction of the storage vehicle, but also use the centering device to squeeze the front and rear wheels of the storage vehicle from both sides to realize the centering correction of the vehicle.