166results about How to "Avoid lubrication" patented technology

An engine control system and an engine control method are disclosed wherein a combustible component quantity of intake air, reflecting combustible components in a crankcase of an engine, is calculated on the basis of a deviation between basic injection quantity for a target rotational speed to be attained and an actual injection quantity during operation to perform idling stabilizing control. A ratio of the combustible components mixed to engine oil is calculated on the basis of the combustible component quantity of intake air and a temperature of engine oil. During a status of the engine with a given temperature of engine oil and the mixing ratio of the combustible components in engine oil, a fuel injection affect eliminating operation is executed.

A wave gear device (1), wherein when a wave generator (4) is in a low speed rotating state, a rolling bearing state is formed by a wave bearing (43) and the wave generator (4) and a flexible external gear (3) are held in a relatively rotatable state and when the wave generator (4) is in a high speed rotating state, partition pieces (7) and split side plate pieces (8) forming the retainer (47) of the web bearing (43) are displaced to the outside to stop the rotation of balls (46) in their axes and the revolution thereof. Accordingly, a sliding bearing state is formed by lubricating oil film (9) formed between the wave generator (4) and the flexible external gear (3) and the wave generator and the flexible external gear are held in a relatively rotatable state. When the wave generator (4) returns to the low speed state, the constraint of the wave bearing (43) is released by the elastic return force of the elastic ring (5) of the retainer (47) and the wave bearing (43) returns to the rolling bearing state. Since a rolling fatigue does not occur on the wave bearing (43) in high speed rotation, the wave gear device allowing the input of the high speed rotation therein can be realized.

A two-stroke internal combustion engine (1) is provided with one pair or plural pairs of C-shaped scavenging passageways (31, 32) of a reverse flow system where scavenging inlet ports (31a) as well as scavenging outlet ports (31b, 32b) are both opened to a cylinder bore (10a), wherein a scavenging introducing passageway (40) for introducing an air-fuel mixture (K) from a crank chamber (18) into the scavenging inlet ports (31a) is provided between the cylinder bore and the piston adapted to reciprocatively move up and down in the cylinder bore (10a), and an effective opening area of the scavenging inlet ports (31a) is gradually decreased due to the piston (20) in the course of descending stroke of the piston (20).

A conveying apparatus of a vehicle washing machine includes a first carrying mechanism, a first driving mechanism and a guiding mechanism. The first carrying mechanism has a base, at least one positioning device, which is disposed on the base and can position a wheel of a to-be-washed vehicle, and a moving device disposed on the base. The first driving mechanism has a driving unit for driving the moving device of the first carrying mechanism. The guiding mechanism guides the moving device to move in a moving direction. The wheel of the vehicle is positioned on the base of the first carrying mechanism, and the base is driven by the driving unit to move the vehicle forward.

The invention belongs to the field of light-weight wear-resisting materials and discloses a wear-resisting heat-conducting polyurethane bearing as well as an preparation method and an application thereof. The preparation method of the wear-resisting heat-conducting polyurethane bearing comprises the following steps of: soaking a fiber into a copolymer, dispersing ultrasonically, adding a polyurethane prepolymer, a curing agent and a heat-conducting filler, mixing the materials, degassing in vacuum, pouring the degassed mixture into a preheating mold, heating to cure, cooling, and demolding to obtain the wear-resisting heat-conducting polyurethane bearing. The wear-resisting heat-conducting polyurethane bearing prepared by adopting the preparation method has the advantages of light weight, wear resistance (relative volume wear loss of 150mm<3>), good heat conductivity of 4W/m*K, high strength (high modulus of compression of 520Mpa, and notched impact strength of 120J/m), low cost, long service life and the like, is simple in forming process, is suitable for industrial production and can be widely applied to clean-energy power generation equipment.

The invention relates to a method for operating a two-stroke engine having scavenging-advance storage. The combustion chamber (3) which in configured in the cylinder (2) is supplied with an air/fuel mixture via a transfer channel (12, 15). This air/fuel mixture is drawn by induction through an inlet into the crankcase (4) during the intake phase. During the intake phase, a fuel-free fluid such as pure air is inducted via a fluid channel (17) and stored in the transfer channel. To obtain good exhaust-gas values while also having reduced fuel consumption and reliable lubrication, lambda (λ) of the air/fuel mixture, which is stored in the crankcase (4), is adjusted in a range of approximately 0.2 to 0.6 in the part-load and full-load ranges of the two-stroke engine (1).

The invention discloses a performance test system used in a hydraulic breaking hammer. The performance test system comprises a hydraulic breaking hammer fixing frame, a striking buffer device which is connected with the frame, a high-pressure hydraulic oil station which is connected with the detected hydraulic breaking hammer, an electric controlling table which is connected with the high-pressure hydraulic oil station, and a sampling and analyzing system which is used for collecting and processing the data of the detected hydraulic breaking hammer. A vertical testing device is used for testing the performance of the hydraulic breaking hammer, and simulating the working condition of the hydraulic breaking hammer, so as to acquire accurate testing results. The performance test system also prevents the cylinder of the testing device from poor lubrication as a result of excessively high pressure which is caused by the gravity of the piston, protects the piston and the cylinder from being pulled, and saves the space. In addition, the use of the pressure sensor to measure the impact of the hydraulic breaking hammer improves the accuracy of measurement. The data acquisition card and the work controlling table can be used for direct and clear on-line measurement, display and calculation of the impact of the hydraulic breaking hammer.

A vapor-compression refrigerant cycle system having an ejector includes a first evaporator for evaporating refrigerant from a pressure-increasing portion of the ejector, and a second evaporator for evaporating refrigerant to be drawn into a refrigerant suction port of the ejector. Furthermore, a valve member for opening and closing a refrigerant passage of the second evaporator is arranged in serious with the second evaporator in a refrigerant flow, and refrigerant flowing out of the second evaporator flows into the refrigerant suction port through a refrigerant suction pipe. The system is provided to restrict lubrication oil contained in refrigerant from being introduced from the ejector into and staying in the refrigerant suction pipe when the valve member is closed. For example, the refrigerant suction port is provided at an upper side of the ejector.

A lubricating oil scattering prevention arrangement provided near a bearing whereby the outward scattering of lubricating oil that leaked from between a stator and rotor due to tilting, impact or the like is prevented. A plate-shaped rotor case 30 is provided with a descending portion 31, a step portion 32 and an outer peripheral portion 33. A magnet 4 is provided on the inner side of the outer peripheral portion 33 and a lubricating oil absorption member is provided between the magnet 4 and the step portion 32. Because an outer peripheral portion of the lubricating oil absorption member is compressed by the magnet 4 upper surface portion and the step portion 32 and thus attached, the lubricating oil absorption member absorbs lubricating oil leaked from the bearing part and the compressed portion prevents the lubricating oil from leaking outwardly.

The invention discloses a two-degree-of-freedom flexible parallel mechanism for motion decoupling. The two-degree-of-freedom flexible parallel mechanism comprises a base, a movable platform, an X-axis branch and a Y-axis branch. The base and the movable platform are connected through the X-axis branch and the Y-axis branch. The X-axis branch and the Y-axis branch are distributed in an orthogonal mode and are of the same structure. The X-axis branch and the Y-axis branch each comprise a first parallel four-rod guiding mechanism, a second parallel four-rod guiding mechanism and a displacement amplification mechanism; the first parallel four-rod guiding mechanism is connected with the base; the second parallel four-rod guiding mechanism is connected with the movable platform; and the displacement amplification mechanism is connected between the first parallel four-rod guiding mechanism and the second parallel four-rod guiding mechanism. According to the two-degree-of-freedom flexible parallel mechanism, the parallel structure is adopted, and the structure is compact; each branch comprises two parallel four-rod guiding mechanisms and one displacement amplification mechanism, the input displacement of a piezoelectric ceramic driver can be amplified, and a large operating stroke is achieved; and meanwhile coupling between X-axis movement and Y-axis movement is avoided.

The invention relates to a double flexible pair-based three-degree-of-freedom precision adjustment parallel mechanism, comprising three groups of motion branch chains which are connected in parallel and have the same structure, wherein the three groups of motion branch chains are in uneven circumference distribution at three extending ends of an immersion unit by taking a center hole of the immersion unit as a center; each group of motion branch chain comprises a linear motion assembly, a double flexible pair connecting rod assembly, a mechanical anti-collision assembly, a Z-direction displacement measuring assembly and a gravity compensation assembly. The double flexible pair-based three-degree-of-freedom precision adjustment parallel mechanism is used for realizing installation, fixationand space position adjustment of the immersion unit of an immersion type photoetching machine and realizing micron-level positioning of the immersion unit; double flexible pairs are adopted, the structure is simple and compact, and the advantages of no friction and no need of lubrication are achieved; the wholly mechanism adopts a parallel mechanism, the rigidity is high, the response is quick, the adjustment range is large, modular design and assembly are adopted, and the mechanism can be used for three-degree-of-freedom precision adjustment in other occasions except the immersion type photoetching machine.

The invention relates to an oil leak preventing device for an upwards curved needle mechanism. A columned upwards curved needle guiding body capable of being freely and rotationally inserted and kept on a circular hole formed on an upwards curved needle guiding component is formed with an upper communicating slotted hole and a lower communicating slotted hole orthogonal with a communicating hole for sliding and lifting of an upwards curved needle table, an oil seal ring elastically and glidingly contacting the outer peripheral face of the upwards curved needle table and provided with a labial part for scraping lubricating oil is inserted in the upper communicating slotted hole, and an oil suction ring capable of sucking and keeping the scraped residual lubricating oil is inserted in the lower communicating slotted hole, therefore, the oil leak preventing device can reliably and favorably exert scraping function of the residual lubricating oil, can reliably prevent the scraped residual lubricating oil from being attached to the outer peripheral face of the upwards curved needle table again to disperse upwards, and can stably maintain the oil link preventing function for a long term.

The artificial carbon humeral prosthesis consists of carbon humeral ball and carbon humeral handle, the humeral ball has fixing slot in its bottom and the humeral handle comprises fixing column and humeral handle rod. The fixing column is embedded into the fixing slot, and the axis of the humeral ball joint surface and the axis of the humeral handle rod form one angle of 135-145 deg. The humeral carbon ball of the present invention has high mechanical strength and high chemical stability, no cell toxicity, no irritability, no genetic toxicity, good biocompatibility, elastic modulus near that of bone, osteoplastic activity and lubricating property. The humeral handle has high mechanical strength, high corrosion resistance and good biocompatibility. The present invention is suitable for use in case of replacing humerus.

The invention relates to a zinc series phosphating solution for aluminum alloys. The zinc series phosphating solution comprises the following components: Zn<2+> 15-18 g/l, PO4<3-> 15-20 g/l, Cu<2+> 0.001-0.003 g/l,Fe<2+> 1-2.5 g/l, F<-> l-2.5 g/l, Ni<2+> 0.5-1.5 g/l. The components are mixed with deionized water so as to prepare the zinc series phosphating solution. The phosphating solution provided by the invention doesn't employ chromium so as to avoid the problem of chromium poison to environment and people, works at a low temperature (35-45 DEG C) so as to save energy, produces few sediments during working, can form a uniform and compact phosphating film with favorable corrosion resistance and the effects such as antifriction and lubrication at a high speed, and increases the bonding strength of a synthetic coating and an aluminum alloy substrate. Besides, the components of the phosphating solution are simple, and the raw materials are easy to purchase.

The invention relates to a full-automatic vanadium-nitrogen alloy discharging device. The device comprises a base, a Z-axis moving mechanism, a Y-axis moving mechanism, a turnover mechanism, a scattering mechanism and an electric control system, wherein the Z-axis moving mechanism, the Y-axis moving mechanism, the turnover mechanism and the scattering mechanism are electrically connected with the electric control system and are controlled to act by the electric control system; the Z-axis moving mechanism is arranged on the base, and comprises a Z-axis support, a Z-axis linear module, a Z-axis head piece, a Z-axis step motor and a Z-axis reducer; the Y-axis moving mechanism is arranged on the Z-axis linear module and comprises a Y-axis frame, a guide rail, a Y-axis bearing block, a Y-axis reducer, a Y-axis motor and a synchronous belt; the turnover mechanism is arranged on one side of the Y-axis moving mechanism; one end of the turnover mechanism is connected with the synchronous belt, and a graphite crucible is clamped to the other end of the turnover mechanism; the scattering mechanism is arranged on the Z-axis linear module. The full-automatic vanadium-nitrogen alloy discharging device is reasonable and compact in structural design, works stably and reliably, and is high in discharging efficiency, and the labor intensity of workers and dust harm on the workers can be effectively reduced.

The invention provides a preparation method of an trapezoidal carbon brush for a seat motor. The method comprises that electrolytic copper powder, natural graphite and phenolic resins powder are mixed uniformly to prepare a high conducting layer mixture; electrolytic copper powder, natural graphite, phenolic resins powder and a lubricant with urotropine are mixed uniformly to prepare a high lubricating layer mixture; the high conducting layer mixture and the high lubricating layer mixture are added successively into a die whose cross section is trapezoidal for compaction, and a pressed compact of the carbon brush is prepared; and sintering and finished product processing are carried out on the pressed compact of the carbon brush to prepare the carbon brush whose cross section is trapezoidal. The carbon brush for the seat motor is formed by combining the high conducting layer mixture with the high lubricating layer mixture and is of a special shape, the side, close to a commutator, is a bending cambered surface, it can be ensured that the front end of the high lubricating layer mixture is protruded and makes contact with the commutator always, and thus, the prepared carbon brush is high in conductive performance, resistant to friction and low in noise.

The present invention provides a defrosting control device, control method and air-conditioning system for an air-conditioning system, wherein the air-conditioning system includes a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3) and a throttling device ( 4), wherein, the control device includes: a judging unit for judging whether the outdoor heat exchanger (3) has reached the level where defrosting is required; an execution unit for controlling the throttling device according to the judgment result of the judging unit Action to defrost when needed. The present invention uses the executive unit to adjust the throttling device to control the defrosting, cancels the original control through the four-way valve reversing, and can effectively prevent the indoor heat exchanger from evaporating and absorbing heat during defrosting, causing indoor The ambient temperature is lowered, which increases the indoor ambient temperature, avoids slow temperature rise, reduces energy loss, reduces noise and abnormal noise, reduces power consumption, improves operational reliability, and prevents problems such as compressor oil shortage and poor lubrication.