135results about How to "Reduce the risk of oil spills" patented technology

The invention belongs to the technical field of sewing machines and relates to a thread cutting and presser foot lifting device of a sewing machine and the sewing machine. The thread cutting and presser foot lifting device of the sewing machine comprises a double-end motor, a thread cutting cam assembly and a presser foot lifting crank assembly, wherein the thread cutting cam assembly comprises a thread cutting cam arranged on a motor shaft at one end of the double-end motor; a movement groove is formed in the thread cutting cam; one end of a thread cutting crank is connected with the thread cutting cam through a connecting pin; the connecting pin is arranged in the movement groove of the thread cutting cam; the other end of the thread cutting crank is connected with a thread cutting shaft; the thread cutting shaft is connected with a thread cutting mechanism; the presser foot lifting crank assembly comprises a presser foot lifting crank arranged on a motor shaft at the other end of the double-end motor; an abutting part is arranged on the presser foot lifting crank; the abutting part abuts against an ejection rod of a presser foot lifting mechanism. According to the thread cutting and presser foot lifting device of the sewing machine, one driving source is used for controlling movement of the thread cutting mechanism and the presser foot lifting mechanism; the driving source is reduced so that the structure is simpler and an occupied space is simple; the thread cutting and presser foot lifting device is convenient to mount and the cost is reduced.

The invention discloses a bridge health monitoring supporting base. The bridge health monitoring supporting base comprises an upper supporting base plate and a lower supporting base plate, a middle liner plate is arranged between the upper supporting base plate and the lower supporting base plate, a basin cavity is formed in the top face of the lower supporting base plate, an oil cavity is formed in the basin cavity, an elastic layer is arranged at the top of the oil cavity, at least two oil ways communicated with the oil cavity are formed in the side face of the lower supporting base plate, any oil way is provided with a pressure sensor, a travel switch is arranged on the lower supporting base plate and provided with a contact, and the contact selectively makes contact with the upper supporting base plate. The bridge health monitoring supporting base is capable of overcoming defects in the prior art, reduces construction complexity of bridge health monitoring and improves bridge monitoring accuracy.

The invention relates to the technical field of sewing equipment, in particular to a sewing machine. The upper end of a top rod is hinged to a lifting presser foot rear lever, the middle of the lifting presser foot rear lever is hinged to a machine shell, the back end of the lifting pressing pedal back lever is connected with an electromagnet, and the front end of the lifting pressing pedal back lever is connected with a lifting pressing pedal front lever through a pull rod; the lifting pressing pedal front lever is connected with a press rod, a boss is arranged in an oil sealing disc, and a through hole which runs through the oil sealing disc is formed in the boss; an oil sealing cap is arranged on the boss, the sealing cap comprises a cap body and a rod part, the lower end of the rod part extends out of the oil sealing disc through the through hole in the boss, and a spring and a limit part are arranged at the lower end of the rod part; one end of the spring abuts against the limit part, the other end of the spring abuts against the bottom plane of the oil sealing disc, and the cap body is connected with a sealing part which is used for preventing the through hole in the boss from leaking oil; the lower end of the top rod penetrates through a baseplate and is located above the oil sealing cap, and the oil sealing cap is driven by a jacking device to move up and down to drivethe top rod to up and down move. According to the sewing machine, frequent movement of the oil sealing cap is reduced, so that the oil sealing cap is not easily aged and damaged, and the risk of oil leakage is reduced.

The invention discloses a bearing box of a heavy slurry pump and a shafting transmission structure thereof and particularly relates to an integral bearing box of a horizontal abrasion-resistant slurry pump and a shafting transmission structure thereof, which belongs to the field of a mechanical transmission technique. The shafting transmission structure disclosed by the invention comprises a pumpshaft, a cooler, a front bearing gland, a rear bearing gland, a front dustproof disk, a rear dustproof disk, a carrier, a bearing box, a second regulating bolt, rear locking stud nuts and a compression ring. In order to reduce the machining area and matching area among a carrier body, a bearing bush and a carrier cover, the bearing bush and the carrier cover are cast into an integral; in order toconveniently regulate the gap between an impeller and an flow passage component, the arrangement of the second regulating bolt is optimized; and a second shaft regulating bolt is changed to be arranged between the rear lower end of the bearing box and the rear rib plate of the carrier, and the regulating space is enlarged, therefore thicker and longer bolts, studs and nuts can be adopted, therebyenlarging the regulating space. In the invention, the machining load can be reduced; the machining cost is lowered; the machining and finishing accuracy is improved; the oil leakage risk is reduced; and the coaxially of the bearing box and the carrier can be better guaranteed.

The invention discloses an efficient lightweight speed reducer for a tower crane. The speed reducer comprises a whole box body, an input shaft, a transmission assembly and an output shaft, wherein theinput shaft, the transmission assembly and the output shaft are sequentially engaged for transmission, the end, extending out of the box body, of the output shaft is of a spline structure, a first convex stop opening is preset on a cover plate of the output shaft and is matched with a first concave stop opening of a winding cylinder spline sleeve, and a second convex stop opening is preset on anouter circle shaft of the end, extending out of the box body, of the output shaft, and is matched with a second concave stop opening of the winding cylinder spline sleeve; an oil tank is formed in thebox body, the inner wall of the oil tank forms a first oil collection groove and a first oil way, the first oil way passes through the transmission assembly and/or a bearing of the output shaft, oneend of the first oil way communicates with the first oil collection groove, the other end of the first oil way communicates with an oil tank inner cavity, the box body is connected with a high-speed end bearing pedestal, a second oil collection groove and a second oil way are formed on the high-speed end bearing pedestal, the second oil way passes through an inner cavity of the high-speed end bearing pedestal, one end of the second oil way communicates with the second oil collection groove, and the other end of the second oil way communicates with the oil tank inner cavity.

The invention discloses a thread shearing or presser foot lifting drive mechanism of a sewing machine. The drive mechanism comprises a motor, a clutch mandrel, a clutch yoke and a drive crank. A motordrive mode replaces a high-power electromagnet, the clutch mandrel with a short force arm is adopted and the clutch yoke is driven to rotate by output of a motor shaft, so that the effect of the large torque on the motor shaft due to a long moment arm of a cam or the crank is reduced, and the overall transmission stability and reliability are high. In addition, the invention discloses a thread shearing or presser foot lifting device. The actions of a thread shearing mechanism and a presser foot lifting mechanism are controlled through a double-end motor, and compared with the prior art, drivesources are reduced, the structure is simpler, the occupied space is small, installation is convenient, and the cost is reduced; moreover, compared with an electromagnet, motor drive has the advantages that the noise is reduced; and further, by combination with an anti-vibration pad, the stability of the whole device is improved, and shake and noise are reduced.

The invention discloses a sheet-shaped heating-type electronic cigarette. The electronic cigarette comprises an appliance and a cigarette body. The appliance comprises a shell, a power supply part, aheating part and a clamping part; the heating part comprises a sheet-shaped insertion supporting part and heating elements; the cigarette body comprises a liquid storage part, a suction nozzle part and a cigarette body packaging part; the liquid storage part comprises a medium which can adsorb tobacco tar and the tobacco tar which is adsorbed by the medium; the clamping part can contain and support the cigarette body, and the appliance is matched with the cigarette body in the mode that the insertion supporting part is inserted into the liquid storage part. During suction, the liquid storage part which contains the tobacco tar is inserted into the appliance and is heated, so that smoke is generate and sensed by a smoker; after suction, a next round of suction can be conducted by replacingthe cigarette body. The heating elements can be arranged on a single surface or double surfaces of the insertion supporting part, so that the atomizing capacity of the sheet-shaped heating-type electronic cigarette for the tobacco tar is greatly improved. The sheet-shaped heating-type electronic cigarette is simple in structure, is sucked hygienically, and is good in simulation sense, convenient to use and environmentally friendly, the cigarette body is replaced rapidly, the risks of oxidative deterioration and tar leakage of the tobacco tar are greatly lowered, and the sheet-shaped heating-type electronic cigarette has broad application prospects.

The invention provides a fuse with a sleeve structure and a mounting method, aims to overcome the defects that a transformer leaks oil and is easily subjected to hot-line work, caused by installation manners of a sleeve and a fuse of a transformer in the prior art, and provides the fuse with the sleeve structure. The sleeve comprises an inner sleeve, an outer sleeve and a sleeve inner protection cover, wherein the inner sleeve is internally provided with a fuse inserting hole; the fuse is inserted into the fuse inserting hole; the sleeve inner protection cover covers outside the inner sleeve and tightly presses the fuse; the outer sleeve covers the inner sleeve and the sleeve inner protection cover; and the outer sleeve is fixedly connected with the inner sleeve. The invention further provides a mounting method of the fuse. The mounting method comprises the following steps: A, inserting the fuse into the inner sleeve; B, fastening the fuse into the inner sleeve; C, fixedly mounting the fuse with the sleeve structure on a box body of the transformer; D, electrically connecting a power cable and the fuse; and E, electrically connecting a high-voltage side winding with the fuse. According to the fuse with the sleeve structure and the mounting method disclosed by the invention, the volume of the transformer is reduced and the risk of leaking oil is reduced; and the fuse is applicable to the circumstance using the transformer.

The invention discloses a turbocharger device and a control method for reducing the oil leakage risk of a turbocharger. The method comprises the following steps that the back pressure of an impeller of a compressor and pressure of an oil returning cavity of an intermediate body are obtained; and the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body are compared, and when the back pressure of the impeller is not larger than the pressure of the oil returning cavity, the rotating speed of the compressor is increased. According to the turbocharger device and the control method for reducing the oil leakage risk of the turbocharger, the pressure difference between the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body can be obtained in real time by obtaining the back pressure of the impeller and the pressure of the oil returning cavity of the intermediate body. According to the pressure difference, whether the turbocharger is in a risk area where oil leakage will happen or not is judged in real time, and before oil leakage happens, the measure that the rotating speed of the compressor is increased to increase the back pressure of the impeller is taken so as to improve the pressure difference, and oil leakage is prevented. Compared with the prior art, the oil leakage risk can be obviously reduced, and driving safety is improved.

The invention discloses an oil-free lubrication Kaplan turbine runner. The oil-free lubrication Kaplan turbine runner comprises a hub body, a blade and a blade servomotor; a water injecting hole is formed in one side of the hub body for injecting clear water or other environment-friendly liquid in a hub before an unit is operated; a drain hole is formed in the bottom of the hub body for draining water in maintenance; the blade servomotor includes a cylinder body, a cylinder cover, a cavity and a piston rod; the cylinder body or the piston rod is connected with the blade through a blade connecting rod mechanism; a blade inner and outer shaft sleeve is arranged between the blade and the hub body; and shaft sleeves on the blade inner and outer shaft sleeve, the blade servomotor and the blade connecting rod mechanism are all self-lubricating bearings. The oil-free lubrication Kaplan turbine runner can adopt the water to replace lubricating oil in a conventional runner hub body, adopts the self-lubricating bearings suitable for the runner operation environment as bearings of a runner motion pair and a friction pair to enable the runner to smoothly operate without polluting rivers, adopts an anti-leaking measure to reduce the risk of the runner leaking oil to the rivers, and can be widely applied to axial flow type and cross flow type Kaplan turbines.

The invention discloses an engine correct timing system inspection tool. The inspection tool comprises a crankshaft position fixing component and a camshaft phase inspection component. The crankshaft position fixing component comprises a crankshaft position fixing body. One end of the crankshaft position fixing body is provided with a boss which is cooperated with a gap on a signal disc edge. A top surface of the crankshaft position fixing body is provided with a bump used for fixing a crankshaft position. The camshaft phase inspection component is a cylinder body whose bottom end is sealed. A top end of the cylinder body is provided with a step. A bottom of the cylinder body is made of a transparent material. The bottom of the cylinder body is marked with scales used for detecting a camshaft position. The invention also discloses an engine correct timing system inspection method. By using the tool and the method of the invention, a oil leakage risk of a correct time system is reduced and work efficiency is increased.

The invention provides an explosion-proof valve, a hydraulic control system, a hydraulic control method and an excavator. The explosion-proof valve is arranged between an oil supply device and a hydraulic actuating element, and comprises a logic check valve and a hydraulically controlled oil pipeline. An electromagnetic reversing valve and a pressure control valve are arranged in series on the hydraulically controlled oil pipeline. The electromagnetic reversing valve is used for controlling the logic check valve to be opened and closed. The pressure control valve is used for controlling the pressure of hydraulically controlled oil on the hydraulically controlled oil pipeline. By adopting an electronically controlled explosion-proof valve as the explosion-proof valve and arranging the explosion-proof valve in the hydraulic control system, the back pressure value of the explosion-proof valve when the hydraulic actuating element is lowered can be effectively reduced, corresponding pipeline arrangement is reduced, the pipeline connection is simple, the cost is greatly reduced, the oil leakage risk points are reduced, by arranging the explosion-proof valve in the hydraulic control system of a movable arm of the excavator, the movement speed of the movable arm is increased, and the lowering speed of the movable arm and the coordination of composite movement are not affected by mounting the explosion-proof valve additionally.

The invention discloses commercial vehicle hub bearing lubricating grease and a preparation method thereof. The invention belongs to the technical field of commercial vehicle hub bearing lubricating grease. The invention aims to improve the high-temperature stability and colloid stability of the lubricating grease, to reduce the grease separation amount of the lubricating grease, to improve the extreme pressure property and the shearing resistance of the lubricating grease, and to reduce consistence changes and grease-water separation of the lubricating grease. A composite polyurea thickeningagent, a composite calcium sulfonate thickening agent and a composite lithium thickening agent are compounded through an integrated synthesis method, so that the high-temperature stability and colloidstability of the lubricating grease are obviously improved, the oil separation amount of the lubricating grease is reduced, the service lifetime of a high-temperature bearing is prolonged, the oil leakage risk of the lubricating grease is reduced, the extreme pressure property and shearing resistance of the lubricating grease are improved, the consistency change of the lubricating grease is reduced and the grease-water separation risk is reduced. A composition of a synthetic adhesive and a natural adhesive has a synergistic effect, the shear stability of the lubricating grease is obviously improved, the consistency change of the lubricating grease is reduced, the lubricating grease is well adhered to the surface of a friction pair, and the grease-water separation risk of the lubricating grease is reduced.

The invention relates to an oil port sealing structure used for a wind power gear box. The structure comprises a part I, a part II and a sealing sleeve; an oil port of the part I and an oil port of the part II are connected through the sealing sleeve; O-shaped sealing rings II are symmetrically arranged between the shaft diameter circumference outer wall face of the sealing sleeve and the contact face of the part I and the part II; an O-shaped sealing ring II is arranged between combination faces of the part I and the part II; a three-sealing structure is achieved, radial sealing, end face sealing and gap sealing can effectively compensate for a micro clearance caused by torsion and other factors of the gear box; the risk of oil leaking of the combination faces of the parts is reduced to the maximum degree, and the oil leaking risk generated in the repairing and maintaining process of the wind power gear box in air can be effectively reduced; and if oil leakage of the combination faces of the parts happens, direct aerial replacement can be carried out, and the maintaining cost is greatly reduced.

The invention discloses a capillary-conduit electronic cigarette atomizer. The capillary-conduit electronic cigarette atomizer comprises an oil storage bottle (7), an oil guide screen (5), and a heating wire (2), wherein the oil guide screen (5) comprises a sieve plate (12), a capillary conduit (4) penetrating through the sieve plate (12) and extending away from the oil storage bottle (7) is arranged on the sieve plate (12), third oil guide cotton (11) is accommodated in the capillary conduit (4), one end of the oil guide cotton (11) is in contact with tobacco tar in the oil storage bottle (7), and an oil injection hole (10) is formed in the side wall of the sieve plate (12); the heating wire (2) is fixed at one end, away from the sieve plate (12), of the capillary conduit (4) in a spiralstructure, and second oil guide cotton (9) is accommodated in a spiral cavity of the heating wire (2); and the oil guide screen (5) is in sealing connection with the oil storage bottle (7) through a silicone sealing plug (6). The electronic cigarette atomizer disclosed by the invention not only can reduce the risk of oil leakage, but also can prevent dry burning of the internal heating wire.

The invention relates to the technical field of atomizers, in particular to a porous ceramic heating element and an atomizer, the porous ceramic heating element comprises a porous ceramic base body, the porous ceramic base body comprises an oil storage base body and an atomizing base body, the oil storage base body is arranged on the upper surface of the atomizing base body, the upper surface of the oil storage base body is an oil guide surface, and an oil storage tank is concavely formed in the oil guide surface; and the lower surface of the atomizing base body is an atomizing face, a heating assembly is printed or embedded in the atomizing face, and the heating assembly is arranged corresponding to the position of the oil storage tank. The porous ceramic base body is divided into the upper portion and the lower portion which are integrally formed, the amount of tobacco tar permeating into the atomizing base body from the oil storage base body in the unit area is increased, and the oil storage amount and the contact area between the tobacco tar and the oil storage base body can be increased by concavely arranging the oil storage tank in the oil guide face of the oil storage base body. The arrangement that the heating assembly is printed or embedded into the atomizing surface can effectively solve the problems that the bonding strength between the porous ceramic matrix and the heating assembly is poor, and the heating assembly is prone to falling off and cracking in the high-temperature atomizing application process in the past.