Comparison of the effects of two YD hydraulic steering gears
1The two structural action modes are 1 broken. The middle hinge swinging steering gear cylinder is fixed around the hinge point, 2 is swung, and the cylinder body moves left and right on the piston rod under the action of hydraulic pressure. The point through the link. And the tiller, the rudder shaft is rotated to complete the steering task 2 new, the fork-type steering gear cylinder is fixed on the base, the cylinder body moves under the action of hydraulic pressure on the piston rod, and rotates through the linked slider to turn the tiller Therefore, the rudder shaft is rotated to complete the steering task. 3 The mode of operation of the swaying cylinder is only a fixed hinge fulcrum. When the rudder force reacts to the aircraft, the force is better, and the base will not The bending moment is generated; and the fork-type steering gear cylinder is fixed at the two ends of the live-removing rod to fix the rudder shackle, and the cold rod is subjected to bending moment, bending deformation occurs, and the guide sleeves at both ends of the cylinder will hate wear and tear. Seriously, the secondary piston rod produces 1. plastic deformation, and even the cylinder is stuck, the steering failure, so in the mode of action, the middle hinge swinging steering engine Yuzi fork rudder å½ 2 two structural effects The ship with the same technical state of the change of the construction cost of the first four ships and the price. Built in + same generation. The cost required is that different price increases usually lead to a substantial increase in the history of ship prices. Take the United States and Britain as an example, the basic factor of inflation caused by the increase in the cost of warships. According to the United Kingdom, the actual price of the seven ships of the Ministry of Defense increased by about 20, after deducting the impact of the inflation factor, the actual cost of the ship rose. 4, the US Navy destroyer in the three works, the price 1 is also up to 2 times. After deducting the influence of inflation, the actual cost of the ship has also increased by about 4 times. In China, since the 2 venting 70 generation, the cost of shipbuilding has risen rapidly. One of the main factors is the impact of changes in the price of goods. The ships built like the 2 dynasties and the 7th generation, due to the slight changes in prices at the time, the cost of ship construction has also changed very little. These circumstances show that the price of the ship has a very close relationship with the price. 5 Shipbuilding costs and construction cycle and funding requirements. 5.1 The impact of the construction cycle. Shipbuilding is an extremely complex and comprehensive system engineering, and modern ships tend to become larger. trend. Usually, the construction period of a ship is relatively long, and it is necessary to make a year for the project, and some have to build it for several years. Many components of the shipbuilding cost are closely related to the construction cycle. The extension of the construction cycle will result in a series of costs. First, the cycle will be paid during the extension period. The factory needs to pay for the first one. The torque is the R` tiller. Radius; rudder angle; U corresponds to the angle of the cylinder swing angle + the number is the left rudder, the number is the right rudder; the efficiency torque is the R tiller half; the rudder angle; capital, the depreciation of the machine will lead to manufacturing costs Increasingly, the period expenses consisting of administrative expenses and financial expenses will also be caused by the need to apportion during the extension period. Secondly, the cost of the shipyard dock in the special fee is the time for the mountain to be priced, and the extension of the period will inevitably cause The increase in this part of the cost is due to the construction cycle of the ship. During this period, the rise in prices will inevitably lead to the increase of the cost of the ship, such as the extension of the shipbuilding cycle, which is caused by the unfamiliar process layout and poor quality of the production, and the cost, the increase in the number of hours, and the increase in the cost.
5.2 Impact of payment progress The funds are in the process of expanding re-industry and its cyclical turnover. The change in the time of the birth will generate the value of the funds. In the construction process of the ship, after the shipbuilding contract is signed, under normal circumstances, the military will pay the progress amount to the shipyard according to the proportion of the payment method and the contract price signed by the contract, and the shipyard will also need to follow the construction schedule and the order contract. . Payment of materials and equipment to the supply unit. However, the progress of the warship will affect the final cost of the ship. For example, if the shipyard’s own use and payment of the supply unit are more than the military’s payment, then the shipyard will have to make a shipbuilding during the construction period, thus adding cost; The amount paid by the party is greater than the amount paid by the shipyard. The shipyard has an increase in interest to obtain additional profits. Therefore, the time value of the funds should be fully considered when making payment progress.
effectiveness.
Comparison of effectiveness. Obviously, assuming that the parameters of the two steering gear cylinders and the radius of the tiller are the same, the corpse measurement is due to the above analysis, the effect of the middle-swinging steering servo is less than or at most equal to the fork rudder and the calculation result Come, fork-type steering gear and torque, and the oscillating steering gear is the rudder angle of the rudder, the torque is gradually reduced, which is not conducive to the rudder operation. Therefore, the effect of the effect is that the fork-type snake machine is better than the middle hinge. Swing 3 Conclusion Regardless of whether the hinged rudder dragon is the advantage of the fork rudder, the stability and bending resistance of the rod piston are important basis when setting and selecting the juice. The way and effectiveness need to be considered comprehensively, in order to meet the requirements of use and other rebellion, to build a poor rabbit; 01 coffee 0 coffee toe ugly 0 coffee. 1 ringing 8 generations of 8661 ringing, 0.
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