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Talking about the Reasons and Countermeasures of the Leakage of Hydraulic System of Construction Machinery
Source: China Bearing Network Time: 2018-04-12
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Key words: hydraulic system leakage leakage seals 1. Foreword leakage is a common phenomenon of hydraulic machinery; especially in the hydraulic system of construction machinery; the first is because the liquid occurs in the hydraulic components and pipelines Pressure difference and gaps in various components lead to leakage. Others; the harsh working conditions will also have a certain impact on the sealing of the construction machinery. Once the hydraulic system leaks, it will lead to the system pressure can not stand up; the hydraulic oil will leak It constitutes environmental pollution; it affects the serious consequences of production and even the inability to estimate. In order to align some of the hydraulic systems that affect the construction machinery, we must briefly talk about the reasons for leakage and countermeasures.
Second, the classification of leakage:
There are two main types of leakage in the hydraulic system of construction machinery; leakage at the fixed seal and leakage at the movement seal; the leakage at the fixed seal mainly includes the bottom of the cylinder and the joint of each joint; the movement seal mainly includes the piston rod of the cylinder, Multi-way valve stems and other parts. From the leakage of oil can also be divided into external leakage and internal leakage; external leakage mainly refers to hydraulic oil leakage from the system to the environment; internal leakage refers to the pressure difference between the high and low pressure sides The existence and the failure of the seal are the same; the hydraulic oil flows from the high pressure side to the low pressure side inside the system.
Third, the reasons for the impact of leakage:
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The reliability of the hydraulic system depends to a large extent on the depiction of the seal of the hydraulic system and the selection of the seals; the selection of the seals in the depiction is unreasonable; the selection of seals is not standard; no hydraulic oil is considered in the depiction. The compatibility type of the sealing data, the load condition, the ultimate pressure, the working speed, the change of the ambient temperature, etc. These all directly or directly constitute the leakage of the hydraulic system in a different degree. Others; because the working environment of the construction machinery has dust And impurities; so the appropriate dust seal should be selected in the depiction; prevent dust and other dirt from entering the system to damage the seal, pollute the oil;
In the depiction of the glass, the few precisions and roughness of the motion appearance are not all and the strength check of the joint is not carried out in the depiction; these will lead to leakage in the mechanical operation.
Ǘ┲圃旌 湟蛩 湟蛩 ǎ ǎ ǎ ǎ ǎ ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀 ┲圃煲蛩兀Poor; for example: the piston radius of the cylinder, the depth or width of the sealing groove, the hole size of the sealing ring is out of tolerance, or the machining is difficult to form a circle, the burr or the burr, the chrome drop, etc.; the seal will have Deformation, scratching, crushing or crushing of the appearance of the image makes it lose the sealing function. It will make the part itself have a congenital leakage point; it will leak after installation or during use.
The hydraulic components of the ǎ ┳ ┳ ┳ 应 在 在 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀 湟蛩兀When installing, the part should be smashed with a small amount of hydraulic oil; gently press in; use diesel when cleaning; especially rubber components such as seal ring, dust ring, O-ring; if it is gasoline, it will easily age and lose its original elasticity; Then lose the sealing function.
ㄈ┯鸵 廴炯 廴炯 悴 鹕 鹕 鹕 ǎ ǎ ǎ ǎ ǎ ǎ ǎ ǎ ǎ ǎ 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大 大The air constitutes a bubble in the oil; if the hydraulic support is in operation for a very short period of time; the pressure changes between high and low pressure, the bubble will be on the high pressure side and the high temperature will burst on the low pressure side; if it is a hydraulic system When the surface of the component has pits and damage, the hydraulic oil will rush to the surface of the component to accelerate the wear of the exterior; resulting in leakage.
.ǎǎ┛廴N廴 hydraulic cylinder is the primary fulfillment component of some engineering machinery hydraulic systems; because the piston rod is exposed to the outside and directly touches the environment during operation; although the guide sleeve is equipped with dustproof ring and seals, etc. Inadvertently bring dust and dirt into the hydraulic system; speed up the scratches and wear of seals and piston rods; then lead to leakage; particle contamination is one of the fastest elements of hydraulic component damage.
ǎ often ┧廴 because of the influence of the working environment and other factors; can make water into the hydraulic system; water will react with hydraulic oil; constitute acidic substances and sludge; reduce the smooth function of hydraulic oil; accelerate the wear of components; The valve stem constituting the control valve is bonded; the operation of the control valve is difficult to scratch the seal; constitutes a leak.
ǎ矗â”慵鹕The seal is made of oil-resistant rubber and other materials; because of the long-term use of aging, cracks, damage, etc., the system will leak. If the part is damaged during the operation, it will be scratched. Component; then constitute a leak.
Fourth, leakage prevention and prevention measures constitute the leakage of the construction machinery hydraulic system is the result of multi-faceted induction; with existing skills and information; to fundamentally eliminate the leak of the hydraulic system is difficult to do. The above factors affect the leakage of the hydraulic system; adopt reasonable methods to minimize the leakage of the hydraulic system. In the depiction and processing, we must fully consider the depiction and processing of the important elements that affect the leakage. Others; the selection of seals is also very important. If it is not the beginning to think about the factors that affect the leakage; it will bring immeasurable loss to the future production. Pick the correct installation and repair methods; learn from the past experience. For example; use the special purpose in the installation of the seal Tools, and apply some smooth grease on the seal ring. In the pollution control of hydraulic oil; start from the source of pollution; strengthen the control of pollution sources; also adopt useful filtration methods and timed oil quality inspection. Useful Blocking the pollution of hydraulic cylinders by external factors (water, dust, particles, etc.); The total return; the prevention and control of leakage must be all started; inductive thinking can do what is useful.
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