There are two ways to install the oil cylinder of the hydraulic freight elevator: jacking and lifting. The difference between jacking and lifting is that the oil cylinder is placed in the opposite direction, which is qualitative and easy to arrange. The disadvantage is that the effective use of the oil cylinder is much larger than that of the lifting mechanism for lifting the same load.

此外，提升机构还需要设置强大的支撑架。因此，液压货运电梯选择顶升机构或提升机构不能一概而论，而应根据提升机的工况进行选择。一般来说，对于提升载荷大、升降高度小的场合，应选择顶升机构，对于载荷小但升降高度大的场合，应选择提升机构。根据顶升初始结构，为了满足稳定性要求，增加油缸的尺寸和提升式，为了达到与顶升苏力相同的有效面积，增加油缸。如果后者较大，应选择顶升机构。

In addition, the lifting mechanism also needs to be equipped with a strong support frame. Therefore, the selection of lifting mechanism or lifting mechanism for hydraulic freight elevator cannot be generalized, but should be based on the working conditions of the elevator. Generally speaking, the lifting mechanism should be selected for the occasions with large lifting load and small lifting height, and the lifting mechanism should be selected for the occasions with small load and large lifting height. According to the initial structure of jacking, in order to meet the stability requirements, increase the size and lifting type of the oil cylinder, and increase the oil cylinder in order to achieve the same effective area as the jacking force. If the latter is large, the jacking mechanism should be selected.

此外，布局是否方便也是一个非常重要的问题。例如，在较大或波浪较高的地方，使用顶升机构会存在布局问题。此时，为了便于布置和防止液压货梯缸被波浪侵蚀，应选择提升结构来确定油肩安装位置，因为桥梁的吊点在提升过程中不是一条直线。因此，气缸在提升过程中会摆动，因此气缸两端与其他部件的连接必须是同一方句的铰接。此外，液压货梯缸的安装方法是尾吊耳式、中间销轴式还是头销轴式也必须经过比较和计算后确定。

In addition, whether the layout is convenient is also a very important issue. For example, in places with large or high waves, there will be layout problems when using the jacking mechanism. At this time, in order to facilitate the arrangement and prevent the hydraulic cargo elevator cylinder from being eroded by waves, the lifting structure should be selected to determine the installation position of the oil shoulder, because the lifting point of the bridge is not a straight line during the lifting process. Therefore, the cylinder will swing in the lifting process, so the connection between the two ends of the cylinder and other components must be the same square hinge. In addition, the installation method of hydraulic cargo elevator cylinder must be determined after comparison and calculation.

主要优点是气缸有效面积大，整机安装高度低。缺点是如果气缸行程较大，气缸存在稳定性问题，然后气缸布局困难。液压货梯提升式机构主要优点是没有稳传安装架的高度士勘口，因此，在落差物大的地方可以考虑用这种形式。

The main advantages are large effective area of the cylinder and low installation height of the whole machine. The disadvantage is that if the cylinder stroke is large, the cylinder has stability problems, and then the cylinder layout is difficult. The main advantage of the hydraulic cargo elevator lifting mechanism is that it has no stable transmission mounting frame, so it can be considered in places with large drop.

头部乍聋油式可使安装加的高度降低，但如果较大时，油缸会因为提升高澎勘丽受力增加，而且提升高度越大，这种增力国溅快，这对油缸的使用是不禾哟，所以太大时，头部销轴式不适用。为了综合考虑安装架的高度和油缸在提升过程中受力的问题，可以考虑中间式的安装方式，安装位置可以根据计算设置在适当的高度上。

The head sudden deafening oil type can reduce the installation height of the oil tank, but if it is large, the force of the oil tank will increase due to the lifting height, and the higher the lifting height, the faster the force increase will be, which is not suitable for the use of the oil tank, so the head pin type is not applicable when it is too large. In order to comprehensively consider the height of the mounting frame and the stress of the oil cylinder during the lifting process, the intermediate installation method can be considered, and the installation position can be set at the appropriate height according to the calculation.

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