| 单词 | wrist pin |
| 例句 | The cylinder walls and wrist pins are lubricated by oil spray thrown from the lower end of connecting rod bearings. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z Screw on rod is where oil is poured into connecting rod to lubricate wrist pin and crankshaft. The 1893 Duryea Automobile In the Museum of History and Technology It may have been cast in two parts, each with a crank arm, and then joined by the wrist pin, after the latter had been turned. The Pioneer Steamship Savannah: A Study for a Scale Model United States National Museum Bulletin 228, 1961, pages 61-80 I at one time seen a wrist pin and boxes ruined by the engineer trying to stop a knock that came from a loose fly-wheel. Rough and Tumble Engineering Some engineers think it advisable to oscillate the wrist pin in the piston bosses, instead of in the connecting rod small end. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z A-7a and A-5a engines have small tubes leading from these bearings which convey the oil under pressure to the wrist pins. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z It is argued that this construction gives more bearing surface at the wrist pin and also provides for more strength because of the longer bosses that can be used. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The axle, probably square in cross section, turned only at the bearings and wrist pin. The Pioneer Steamship Savannah: A Study for a Scale Model United States National Museum Bulletin 228, 1961, pages 61-80 When he starts up, ten to one the wrist pin heats and he stops and loosens it up and then it knocks. Rough and Tumble Engineering This consisted of driving a taper pin through both rod and wrist pin and then preventing it from backing out by putting a split cotter through the small end of the tapered locking pin. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The wrist pin should be retained by some positive means which is not liable to become loose under the vibratory stresses which obtain at this point. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The piston is a cylindrical member provided with a series of grooves in which packing rings are placed on the outside and two bosses which serve to hold the wrist pin in its interior. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z A good view of the wrist pin and connecting rod are also given. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z In a new engine you will find that these two halves do not meet on the wrist pin by at least one-eighth of an inch. Rough and Tumble Engineering A very positive method is shown at C. Here the retention screws pass into the wrist pin and are then locked by a piece of steel wire which passes through suitable holes in the ends. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The wrist pin member is a simple cylindrical element that fits the bosses closely, and it may be either hollow or solid stock. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z This method has the advantage of providing a certain degree of adjustment if the wrist pin should loosen up after it has been in use for some time. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z This makes a very positive lock and one that can be easily loosened when it is desired to remove the wrist pin. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z A typical connecting rod and its wrist pin are shown at Fig. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The small end is bored out to receive the wrist pin which joins it to the piston, while the large end has a hole of sufficient size to go on the crank-pin. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The wrist pin is provided with a hole of sufficient size to receive the plunger, which is kept in place by means of a spring in back of it. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The upper end of the connecting rod may be one piece, because the wrist pin can be introduced after it is in place between the bosses of the piston. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z Where the connecting rod is clamped to the wrist pin and that member oscillates in the piston bosses the wear will usually be indicated on bronze bushings which are pressed into the piston bosses. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The only remedy is to fit new wrist pins to the piston. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z The alternative is to ream out the bosses and upper end of rod a trifle larger after holes are trued up and fit oversize wrist pins. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z |
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