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KCB gear pump seal installation tips
KCB gear pump seal installation skills First of all, we first introduce the working principle of the gear pump, and only understand its working principle can be properly installed by the seal. Gear pump is to rely on the pump cylinder and the meshing gear formed between the work volume changes and movement to transport liquid or booster pump. The two closed gears are composed of two gears, a pump body and a front cover and a back cover. When the gear rotates, the volume of the space on the side where the gear is disengaged becomes larger and becomes a vacuum, the liquid is sucked in and the volume of the space on the gear engaging side changes greatly Small, squeezing the liquid into the pipe. The suction chamber and the discharge chamber are separated by the meshing line of two gears. The pressure at the outlet of the gear pump depends entirely on the resistance of the pump. The concept of gear pump is very simple, that is, its most basic form is that the same size of two gears in a close-fitting rotation of the mutual engagement within the shell, the shell is similar to the internal "8" shape, two gears inside , The outer diameter of the gear and both sides of the shell with the close fit. The material from the extruder enters the middle of the two gears at the suction port and fills this space, moving along the housing as the teeth rotate, finally exiting when the two teeth mesh. In the jargon, a gear pump, also called a positive displacement device, is like a piston in a cylinder that is squeezed out mechanically as one tooth enters the fluid space of the other tooth. Because the fluid is incompressible, the liquid and the tooth can not occupy the same space at the same time, so the fluid is eliminated. As a result of the continuous meshing of the teeth, this phenomenon occurs continuously and thus provides a continuous discharge at the outlet of the pump, the same amount of discharge per revolution of the pump. As the drive shaft rotates uninterruptedly, the diaphragm pump discharges the fluid without interruption. Pump flow directly with the pump speed. In fact, there is a small amount of fluid loss in the pump, which makes it impossible to achieve a pump operating efficiency of 100% because these fluids are used to lubricate both sides of the bearing and gear, and the pump body can never be gap-free Can not make the fluid 100% discharged from the outlet, so a small amount of fluid loss is inevitable. However, the pump can still run well and still achieve efficiencies of 93% to 98% for most extruded materials. For fluids with varying viscosity or density in the process, the magnet pump is not affected too much. If you have a damper, such as a screen or a restrictor on the side of the outlet, the pump will push fluid through them. If this damper changes at work, ie if the screen becomes dirty, clogged, or the backpressure of the restrictor is increased, the pump will still maintain a constant flow until the mechanical limit of the weakest part of the device is reached (Usually fitted with a torque limiter). Here I introduce the KCB gear pump seal installation skills. 1, the gear pump seal installation should pay attention to balance, the symmetry of the seal placed just in place close to the effective sealing surface (or lip line), after installation, the seals need to do further observation and rehabilitation work, Prevent system operating conditions due to changes in conditions (such as booster) and micro-leakage caused by the collapse. 2, the gear pump seal installation Do not damage the sealing surface or seal line Plane seal the upper and lower ends of the hydraulic seal hole or shaft associated with the lip line (seal line) determines the sealing performance of the seal, the seal These parts of the sealing material to be resistant to temperature, corrosion resistance, anti-aging properties, it is by both soft and resilient graphite, rubber, fiber and other vulnerable special materials, so more need to install the seal The process of sealing parts to give the sealing surface or sealing line special protection and care, once damaged will often leave a lot of hidden parts of the sealing loss caused.