Seven points to introduce the main performance of the German FLUTEC reversing valve

Seven points to introduce the main performance of the German FLUTEC reversing valve:

1. Working reliability

refers to whether the electromagnet can commutate reliably , and whether it can be reliably reset after a power failure. The German FLUTEC reversing valve can only operate normally within a certain flow rate and pressure range. The limit of this working range is called the commutation limit.

2. Pressure drop

Because the opening of the German FLUTEC reversing valve is very small, there is a large pressure drop when the liquid flows through the valve port.

3. Internal leakage

In various working positions, under the specified working pressure, the leakage from the high pressure chamber to the low pressure chamber is the internal leakage. Excessive internal leakage not only reduces the efficiency of the system, causing overheating, but also affects the normal operation of the actuator.

4. Reversing and reset time

The reversing time of the ACGerman FLUTEC reversing valve is generally 0.03 ~ 0.05 s, and the reversing impact is relatively large, while the DC German FLUTEC reversing valve The reversing time of the valve is 0.1-0.3 s, and the reversing impact is small. Usually the reset time is slightly longer than the commutation time.

5. Reversing frequency

The reversing frequency is the number of times the valve is allowed to reverse per unit of time. At present, the reversing frequency of the German single electromagnet FLUTEC reversing valve is generally 60 times/min.

6. Service life

The service life of the German FLUTEC reversing valve mainly depends on the electromagnet. The life of the wet electromagnet is longer than that of the dry type, and the life of the DC electromagnet is longer than that of the AC.

7. The Hydraulic Clamping Phenomenon Of German FLUTEC Reversing Valve

The Hydraulic Clamping Phenomenon Of German FLUTEC Reversing Valve Not Only Occurs With The German FLUTEC Reversing Valve, Butalso in other hydraulic valves It is also common, and it is more prominent in high pressure systems, especially the longer the residence time of the spool valve, the greater the hydraulic clamping force, so that the thrust of the moving spool valve (such as the electromagnetic thrust) can not exceed the clamping resistance overcome, which prevents German FLUTEC reversing valves from resetting.

The reason for the hydraulic clamping is that the valve core is difficult to move due to dirt entering the gap, and some are stuck because the gap is too small and the valve core expands as the oil temperature rises, but the main reason is from the radial unbalanced hydraulic pressure caused by the geometry error of the control valve pair and the change of concentricity. In order to reduce the radial unbalanced force, the manufacturing accuracy of the valve core and valve hole should be strictly controlled.During assembly, it should be as much as possible the shape hebb of a straight cone. On the other hand, an annular pressure equalization groove on the valve core can also significantly reduce radially unbalanced forces.

German FLUTEC reversing valve is mainly composed of valve body, sealing structure, cam, valve stem, handle and valve cover and other components. The valve is actuated by the handle and the valve is actuated by the handleThe handle and cam rotate, and the cam has a positioning drive and locks the opening and closing function of the sealing assembly. When the handle is turned counterclockwise, the two sets of sealing assemblies respectively close the two passages at the lower end under the action of the cam, and the two passages at the upper end communicate with the inlet of the pipeline device, respectively. On the contrary, the two passages at the top are closed, and the two passages at the bottom are connected with thee inlet of the pipeline device, so that the non-stop reversal is realized.

(1) The valve body of the German FLUTEC reversing valve is divided into two chambers by a partition, each chamber has 3 channels, the middle is the oil inlet, and the two ends are the oil outlets. The valve body is a welded carbon steel plate structure, which is small, light and compact in structure, which improves the utilization rate of materials, shortens the production cycle and reduces costs. The sealing surface is covered with stainless steel, which is rust and corrosion resistant. The sealing surface is polished and ground after finishing, and the surface roughness is Ra≤0.8μm.

(2) The German FLUTEC reversing valve has two sets of sealing components. Each seal assembly is composed of valve disc, seal ring, adjusting block, adjusting screw, splint and bolt. The disc is made of welded carbon steel with reinforcement ribs, which not only increases the strength of the disclarge, but also acts as a conductor to ensure coaxiality between each group of disks. The valve disc is inlaid with a polyurethane rubber ring, which has the characteristics of oil resistance, wear resistance, stable performance, good sealing and long service life. Under the action of the cam, the spherical surface of the sealing ring is in contact with the sealing surface of the valve body to produce extrusion elastic deformation to achieve the sealing effect. The adjustment block and adjustment screw can be adjusted when the two sets of sealing components cannot be synchronized in place, to ensure that the sealing performance of each channel is synchronized in place.

The German FLUTEC reversing valve is a directional control valve with more than two flow forms and more than two oil ports. It is a valve that realizes communication, shut-off and reversal of hydraulic oil flow, as well as pressure reliefsting and sequential action control. The valve is controlled by the direction of relative movement of the spool and valve body. There are two types of rotary valve and slide valve. According to the number of working positions where the valve core remains in the valve body, it is divided into two positions, three positions, etc.; according to the number of oil circuits connected to the valve body, it is divided into two-way, three-way, four-way and six-way, etc.; the way to control the movement of the valve core There are manual, motorized, electric, hydraulic, electro-hydraulic and other types.

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