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Why does the rolling machine need to be sealed?
What is forbidden to workers when operating a rolling machine?
What is a hydraulic rolling machine?
The reliability and service life of the seals in the hydraulic system of sheet metal bending machine are important indicators to measure the quality of the hydraulic system.
In addition to gap seals, seals are used to keep the gap between two adjacent coupling surfaces below the minimum gap through which the liquid to be sealed can pass. The seals in the hydraulic system of sheet metal bending machine are usually contact seals. There are two types of self-sealing compression seals and self-sealing self-clamping seals, also known as lip seals. However, the factors influencing the performance of different seals in the hydraulic system of the sheet metal rolling machine are different, just as with the three-roller roller. In fact, the seal of the hood is still influenced by temperature, pressure and the existing medium.
During the measurement of the roundness of dimensions, the operator of the rolling machine is forbidden to stand on the rolled cylinder, and it is forbidden to stand on the workpiece to be machined. For some difficult-to-process workpieces, such as thicker or larger diameters, high hardness or strength of raw materials, etc., this should be done by a small number of operations simultaneously to achieve the desired effect. For some workpieces with smaller diameters, they should be rolled in the middle of the rollers for operation.
The main features of hydraulic plate rolling machine: the upper roller of the machine can be lifted vertically, and the hydraulic transmission of vertical lifting is achieved by the action of the hydraulic oil in the hydraulic cylinder on the piston rod; The torque is provided, and there are tensioners under the lower roller that can be adjusted. The upper roller has the shape of a drum, which improves the straightness of the product and is suitable for tanks with various cross-sectional shapes with ultra-long specifications.
Hydraulic rolling machines can roll metal plates into circles, arcs and conical workpieces within a certain range. The two lower rollers of this model are active rollers and the upper rollers driven rollers. It is widely used in shipbuilding, boiler, aerospace, hydropower, chemical, metal structure and mechanical engineering industries.
The hydraulic rolling machine is suitable for bending metal plates. It can roll circular, arc and conical workpieces within a certain range and has the function of pre-bending the end of the plate. The two lower roles of this model are active roles. Horizontal movement, the upper roller is a driven roller and can move up and down. There are mechanical and hydraulic movements. The driveshafts are connected by cardan couplings.
To meet these growing demands, WINCOO ENGINEERING CO., LTD has various rolling machines, all of which are more effective, reliable and consistent.
What are the precautions for using the tank hydraulic jacking system?
The role of the tank hydraulic jacking system is to increase the force by changing the pressure. The main function of the tank hydraulic jacking system is to transmit power and movement. Next, the precautions of the tank hydraulic jacking system will be explained in detail.
Here is the content list:
l Common problems when using tank hydraulic jacking system.
l Combining the above problems, talk about the measures to control the leakage of tank hydraulic jacking system.
l Matters needing attention when using tank hydraulic jacking system.
Common problems when using tank hydraulic jacking system.
Reasons for leakage of tank hydraulic jacking system.
(1) Caused by defects in design and manufacturing
(2) Impact and vibration cause loose pipe joints
(3) Mutual wear of dynamic seals and matching parts (especially hydraulic cylinders)
(4) The oil temperature is too high and the rubber seal is incompatible with the hydraulic oil and deteriorated.
Combining the above problems, talk about the measures to control the leakage of tank hydraulic jacking system.
l Solution 1: Design and manufacturing defect solutions
The selection of external components of tank hydraulic jacking system often plays a decisive role in the leakage of hydraulic system. This determines that in the improvement of tank hydraulic jacking system, our technicians should carefully choose the cylinders, pumps, valves, seals, hydraulic accessories, etc. based on the principle of choosing the best among the best and choosing the cheap.
① Reasonably design the mounting surface and sealing surface of the tank hydraulic jacking system. When the valve block or pipeline is fixed on the mounting surface, in order to obtain a satisfactory initial seal and prevent the seal from being pushed out of the groove and being worn.
② The installation surface of the tank hydraulic jacking system should be straight and the sealing surface should be finished. The surface roughness should reach 0.8μm and the flatness should reach 0.01/100mm. The surface must not have radial scratches, and the pre-tightening force of the connecting screw must be large enough to prevent surface separation.
③ During the manufacturing and transportation of tank hydraulic jacking system, it is necessary to prevent the key surface from bumping and scratching. At the same time, the assembly and debugging process must be strictly monitored to ensure the quality of assembly.
④ Do not be taken lightly about the leakage of some tank hydraulic jacking system, and must be eliminated.
l Option 2: Reduce shock and vibration
In order to reduce the leakage of tank hydraulic jacking system caused by the loosening of pipe joints subjected to shock and vibration, the following measures can be taken:
① Use shock-absorbing brackets to fix all pipes to absorb shock and vibration;
② Use low-impact valve or accumulator to reduce the impact;
③ Properly arrange pressure control valves to protect all components of the tank hydraulic jacking system;
④ Minimize the number of pipe joints used, and try to use welding to connect pipe joints;
⑤ Use straight threaded joints, tee joints and elbows instead of tapered pipe threaded joints;
⑥ Try to replace each piping with oil return block;
⑦ For the highest pressure used by the tank hydraulic jacking system, specify the bolt torque and plug torque during installation to prevent the joint surface and seal from being eaten away;
⑧ Install the pipe joints of the tank hydraulic jacking system correctly.
l Option 3: Reduce the wear of dynamic seals
Most of the dynamic seals have been precisely designed. If the dynamic seals are qualified, installed correctly, and used reasonably, they can guarantee a long-term relatively leak-free work. From the perspective of tank hydraulic jacking system design, designers can take the following measures to extend the life of dynamic seals:
① Eliminate the side load on the piston rod and drive shaft seal;
② Use dust ring, protective cover and rubber sleeve to protect the piston rod to prevent abrasives, dust and other impurities from entering;
③ Design and select a suitable filter device and a fuel tank that is easy to clean to prevent dust from accumulating in the oil;
④ Keep the speed of the piston rod and shaft as low as possible.
Matters needing attention when using tank hydraulic jacking system.
First of all, the requirements for static seals,tank hydraulic jacking system static seals prevent oil leakage between rigid fixed surfaces. Reasonably design the size and tolerance of the seal groove, so that the installed seal will be deformed to a certain extrusion so as to fill the microscopic depression of the mating surface and increase the internal stress of the seal to be higher than the pressure to be sealed.
It should be noted that when the rigidity of the part or the pre-tightening force of the bolt is not large enough, the mating surface will separate under the action of the oil pressure, causing a gap or increasing the gap that may exist from the beginning because the sealing surface is not flat enough. As the mating surface moves, the static seal becomes a dynamic seal. Rough mating surfaces will wear the seal, and the fluctuating gap will eat away at the edge of the seal.
In addition, control the oil temperature to prevent deterioration of the seal. Premature deterioration of the seal may be caused by many factors. An important factor is the high oil temperature. Each time the temperature rises by 10°C, the seal life will be halved. Therefore, a reasonable design of an efficient tank hydraulic jacking system or a forced cooling device should be provided to keep the optimal oil temperature below 65°C.
Among them, engineering machinery of tank hydraulic jacking system must not exceed 80°C, and hydraulic oil and seal types and materials should be selected according to the operating instructions or relevant manuals to solve compatibility problems and extend the service life of seals.
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The advantages of hydraulic storage tank lifting equipment are the main ones. With the continuous improvement of design, manufacture and use level, some disadvantages are gradually being overcome. hydraulic storage tank lifting equipment has broad prospects for development.
What are the structural advantages of hydraulic storage tank lifting equipment?
What are the advantages of using hydraulic storage tank lifting equipment?
What are the precautions for installation of hydraulic storage tank lifting equipment?
Since the hydraulic storage tank lifting equipment is connected by oil pipes, the transmission mechanism can be conveniently and flexibly arranged by the connection of oil pipes, which is superior to mechanical transmission. For example, a pump that extracts oil downhole can be driven by a hydraulic drive to overcome the inefficiency of long drive shafts. Due to the large thrust of the hydraulic cylinder and its easy arrangement, it has basically replaced the old-fashioned mechanical transmission in heavy construction machinery such as excavators, which is not only easy to operate, but also beautiful in appearance.
1. The hydraulic storage tank lifting equipment can realize stepless speed regulation in a wide range. With the help of valve or variable pump and variable motor, stepless speed regulation can be achieved, the speed regulation range can reach 1:2000, and the speed can be adjusted during the operation of the hydraulic device.
2. hydraulic storage tank lifting equipment, the thought transmission movement is uniform and stable, and the speed is relatively stable when the load changes. Because of this feature, almost all of the grinder drives in metal cutting machine tools now use hydraulic drives.
3. hydraulic storage tank lifting equipment is easy to achieve overload protection - by means of setting overflow valves, etc., and the hydraulic parts can be self-lubricated, so the service life is long.
4. hydraulic storage tank lifting equipment is easy to realize automation - with the help of various control valves, especially when hydraulic control and electrical control are used in combination, complex automatic work cycles can be easily realized, and remote control can be realized.
The central axis of the hydraulic storage tank lifting equipment should be concentric with the central line of the load force to avoid side force caused by the jacking operation, which may easily cause the seals to wear and the piston to be damaged. For hydraulic jacks for moving objects, keep the oil cylinder parallel to the moving object in the direction of movement during installation, otherwise the cooperation between the hydraulic jack and the moving object will be unreliable.
WINCOO ENGINEERING CO., LTD has ability of providing workable solutions to support clients to be awarded with shorter project execution time, fewer man-hour costs and higher efficiency construction/fabrication method and better quality during phase of project bidding.
Hydraulic storage tank lifting equipment consists of oil chamber, oil pump, oil storage chamber, piston, crank handle, oil valve and other main parts. When working, as long as the crank handle is moved back and forth, the manual oil pump continuously presses oil into the oil cylinder. Due to the continuous increase of the oil pressure in the oil cylinder, the piston and the weight on the piston are forced to move upward together.
What are the precautions for the use of hydraulic storage tank lifting equipment?
What are the structural parts of hydraulic storage tank lifting equipment?
What should be paid attention to before using hydraulic storage tank lifting equipment?
1. Hydraulic jacks cannot be used as permanent support equipment. For long-term support, the support part should be added under the heavy object to ensure that the hydraulic jack is not damaged.
2. If only one hydraulic storage tank lifting equipment is used to lift one end of the heavy object, the hydraulic storage tank lifting equipment should be placed on the symmetrical axis of the heavy object, and the long direction of the hydraulic jack base and the easy toppling of the heavy object should be made. the same direction. If two hydraulic jacks are used at one end of the heavy object, the direction of the base should be slightly symmetrical and placed on both sides of the symmetrical axis of the heavy object.
3. When two or more hydraulic storage tank lifting equipment are used to lift at the same time, they must be commanded, coordinated, and lifted at the same time.
4. Hydraulic storage tank lifting equipment should be stored in a dry and dust-free place. It is not suitable for use in workplaces with acid, alkali and corrosive gases, and it should not be placed outdoors in the sun and rain!
The hydraulic storage tank lifting equipment is a piston type lifting equipment, consisting of a hydraulic control cabinet (pumping station), the main bearing of the high-pressure oil pipe, the accessories of the hydraulic pump system, the oil control valve, the piston jack, the ring wire rope hanger, and the pumping station by two independent Composed of a hydraulic lifting unit and a centralized electrical control cabinet, it can serve the lifting of two 10000m³ tanks at the same time. Each 10000m³ tank is equipped with 20 jacks. The total composition of the hydraulic oil pipe is distributed in two stages, and then the hydraulic oil is sent to the hydraulic jack. Short construction period, low cost and good economic benefits are its significant advantages.
1. Before lifting, put the slotted end of the handle into the oil return valve stem, and tighten the oil return valve stem clockwise.
2. The handle of hydraulic storage tank lifting equipment is inserted into the handle hole and pressed up and down, and the piston rod will rise steadily to lift the heavy object. Due to the limiting device in the jack, it will not rise when it reaches a certain height.
3. To lower the piston of hydraulic storage tank lifting equipment, just use the slotted end of the handle to slightly loosen the oil return valve rod counterclockwise (no more than 2 turns), and the piston rod will gradually descend. If there is a load, the oil return valve stem should not rotate too fast, otherwise it will be dangerous if the descending speed is too large.
WINCOO ENGINEERING CO., LTD has committed to the research and product of hydraulic storage tank lifting equipment for several years, it will provide the best quality products.
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