69results about How to "Smooth oil return" patented technology

In order to provide an oil ring that is for an internal combustion engine, stably obtains over the long term the ability to scrape away excess oil from the inner walls of cylinders, allowing the oil to flow down the rear surface of pistons, and can reliably reduce the amount of oil consumption during driving of the internal combustion engine, an oil ring for an internal combustion engine is used wherein: an oil ring body is provided with a coil-expander-accommodating indentation that runs along the inner peripheral surface thereof and of which the cross section in the axial direction of the oil ring is roughly semicircular; furthermore, at the inner peripheral surface of said coil-expander-accommodating indentation, an oil-returning groove is formed that is along the inner peripheral surface thereof and that smoothly returns scraped-off oil to the rear surface of the piston; and in said oil-returning groove, in a cross-section in the axial direction of the oil ring, the outer peripheral shape thereof is configured from lines and curves that connect said lines.

The invention discloses a stainless steel plate type heat exchanger and a processing molding method thereof. The plate type heat exchanger comprises a snakelike flow channel type and honeycomb flow channel type evaporation plate or a cold plate. The plate type heat exchanger adopts a stainless steel plate and consists of a stainless steel upper plate, a stainless steel lower plate, an inlet pipe and an outlet pipe, wherein the two stainless steel plates are overlapped and connected by a special welding method; the inlet pipe and the outlet pipe are inserted in the upper end and the lower end between the two stainless steel plates and are connected with the stainless steel plate type heat exchanger body by using an electric arc welding method; and then the plate type heat exchanger is finally molded through a mould and high-pressure bulging technology.

The invention discloses an aluminum honeycomb type evaporation plate and a processing molding method thereof. The evaporation plate adopts a high strength aluminum alloy plate and consists of an upper plate, a lower plate, an inlet pipe and an outlet pipe, wherein the two high strength aluminum alloy plates are overlapped and welded together by a solid-phase stir friction connecting method; the inlet pipe and the outlet pipe are inserted in the upper end and the lower end between the two high strength aluminum alloy plates and are connected with the high strength aluminum alloy evaporation plate body by using an electric arc welding method; and then the evaporation plate is finally molded through a mould and high-pressure bulging technology.

An air-cooled split-type air conditioner connection system, aiming at the problems of large resistance and poor oil return in the pipeline when the air conditioner is installed over a long distance and with a high drop, the invention provides an air conditioner connection system, its The exhaust rising pipeline (4) is a consistent upward pipeline, and an oil separator (5) is installed at the lower end of the exhaust rising pipeline (4), and the exhaust inlet (5-1) of the oil separator (5) It is connected with the exhaust horizontal pipeline (3) coming out of the indoor unit (1), and the exhaust outlet (5-2) of the oil separator 5 is connected with the exhaust rising pipeline (4) going to the outdoor unit (2); The oil return pipe interface (5-3) of the oil separator (5) is connected to one end of the oil return line (6), and the other end of the oil return line (6) is connected to the compressor (1-1) in the indoor unit (1) on the air return line (1-2). The invention has the advantages of small resistance, smooth oil return, simple system structure, easy implementation, easy installation, low cost, low initial investment, low operation and management costs, less building space occupation, and low cost, which is beneficial to popularization and application.

The invention discloses a magnesium alloy plate type heat exchanger and a processing molding method thereof. The plate type heat exchanger comprises a snakelike flow channel type and honeycomb flow channel type evaporation plate or a cold plate. The plate type heat exchanger adopts a high strength magnesium alloy plate and consists of a magnesium alloy upper plate, a magnesium alloy lower plate, an inlet pipe and an outlet pipe, wherein the two magnesium alloy plates are overlapped and welded together by a solid-phase stir friction connecting method; the inlet pipe and the outlet pipe are inserted in the upper end and the lower end between the two high strength magnesium alloy plates and are connected with the high strength magnesium alloy plate type heat exchanger body by using an electric arc welding method; and then the plate type heat exchanger is finally molded through a mould and high-pressure bulging technology.

The invention discloses a hydraulic system for telescopic buffer of a crane boom and a crane. The hydraulic system for telescopic buffer of the crane boom comprises a telescopic oil cylinder, a main valve and a balance valve, wherein a first working oil port and a second working oil port of the main valve are respectively connected to a rod chamber of the telescopic oil cylinder and a free oil inlet of the balance valve in a communication way, a free oil outlet of the balance valve is connected to a rodless chamber of the telescopic oil cylinder in a communication way, and the first working oil port is also connected to a control oil port of the balance valve in a communication way through a control oil line; and the hydraulic system for telescopic buffer of the crane boom also comprises an auxiliary pressure-relief oil line, a through flow damper and a hydraulic control pressure-relief on-off valve, wherein the oil inlet end of the auxiliary pressure-relief oil line is connected to the rodless chamber of the telescopic oil cylinder in a communication way, the through flow damper and the hydraulic control pressure-relief on-off valve are arranged on the auxiliary pressure-relief oil line, and the control oil port of the hydraulic control pressure-relief on-off valve is connected to the control oil line or the first working oil port in a communication way. By implementing the hydraulic system, impact generated by the balance valve or a pressure shunting damper when the crane boom is started to be shrunk can be effectively reduced.

The invention discloses a falling-film water-cooled screw low-temperature solution unit. The screw compressor communicates with the air inlet of a built-in oil condenser, and the oil outlet valve of the built-in oil condenser communicates with the suction pipeline of the screw compressor. One way of the liquid outlet of the condenser is connected with the energy-saving gas supply port of the screw compressor through the second channel of the economizer, and the other way is through the first channel of the oil return heat exchanger, the second channel of the economizer, the electronic expansion valve and the double-stage falling film evaporator The liquid inlet is connected, the gas outlet of the double-stage falling film evaporator is connected with the inlet of the screw compressor; the oil outlet valve of the double-stage falling film evaporator is connected with the second channel of the oil return heat exchanger and the middle inlet of the ejector , The outlet of the ejector communicates with the suction passage of the screw compressor. The invention creatively applies the falling film evaporator to the water-cooled screw low-temperature solution unit, which improves the heat exchange efficiency of the evaporator, saves the space of the unit with a built-in oil condenser, and the design of the oil circuit makes the oil return of the screw compressor safer and more efficient. more reliable.