A floor drain is a plumbing fixture that is installed in the floor of a structure, mainly designed to remove any standing water near it. They are usually round, but can also be square or rectangular. They usually range from 2 to 12 inches (5.1 to 30.5 cm); most are 4 inches (10 cm) in diameter. They have gratings that are made of metal or plastic. The floor around the drain is also sloped to allow the water to flow to the drain. Many residential basements have one or more floor drains, usually near a water heater or washer/dryer. Floor drains can also be found in commercial basements, restrooms, kitchens, refrigerator areas, locker/shower rooms, laundry facilities, and near swimming pools, among other places.
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Analysis: Gear pump common fault problems and solutions
Gear pump troubleshooting Summary: The processing of automotive hardened steel parts coating PCBN tool CNC WEDM in the spline hole machining applications SinamicsG110 In the need to quickly change the direction of the motor should explore the occasion of the Chinese mechanical products Innovative design and development of micro-hole processing technology status and existing problems Selection and maintenance of cutting fluid The rational choice of indexable milling cutter The key technology of spindle speed The strengthening of the cutting edge and its latest development CVD diamond dressing tool China CNC The machine tool industry will usher in the golden development of 15 years Tool manufacturers to process improvement to Chengdu Institute of Tool Two research projects through the identification of the door with the loading and unloading system of the machine The first self-bolt six drilling rig Germany Engelhardt ) Company F33 three-axis CNC system by PDM Health "egg" Anhui forklift successfully developed 4.5t hydraulic pump gearbox low-voltage electrical reliability profile and development of welding teaching reform of thinkers and practitioners [Tags: CB-B-type gear pump in the dump truck and construction machinery operating mechanism used more, it is now common Barrier and negative methods described below for reference. 1, the reasons for the vibration and noise generated and excluded (1) inhaled air ①CB-B gear pump body and both sides of the cover for direct contact with the hard seal, if the contact surface flatness does not meet the requirements, the pump At work, it is easy to breathe air.Currently, CB-B gear pump is widely used in dump truck and construction machinery control mechanism, and its common faults and troubleshooting methods are introduced below for reference. 1, the reasons for the vibration and noise generated and excluded (1) inhaled air ①CB-B gear pump body and both sides of the cover for direct contact with the hard seal, if the contact surface flatness does not meet the requirements, the pump Easy to breathe in the air at work; also, the direct contact between the end cap of the pump and the gland, the air is also easy to invade; if the gland is a plastic product, due to its damage or deformation due to temperature changes, will seal Strictly into the air. The way to get rid of this kind of trouble is: When the flatness of the pump body or pump cover can not meet the stipulated requirements, it can be grinded back and forth on the flat steel with the "8" shaped route with the gold sand, or on the surface grinder , So that its flatness does not exceed 5μm, and the need to ensure that the plane and the hole perpendicularity requirements; For the pump cover and gland at the leak, can be coated with epoxy adhesive sealing. ② The shaft is generally sealed with a skeleton oil seal. If the locking lip spring off, or the oil seal installed, or its lips were injured, aging, will make the back end of the seal often in negative pressure and inhale the air, the general can replace the new seal to be resolved. ③ fuel tank is not enough oil, or the suction nozzle is not inserted below the oil surface, the pump will inhale the air, this time should be added to the fuel tank to the oil line; if the oil return pipe mouth exposed oil, and sometimes because of Negative pressure within the system so that the air back into the system of irrigation, so return pipe mouth generally should be inserted below the oil level. ④ pump installation location is too high from the oil surface, especially in the pump speed is reduced, because the pump can not guarantee the necessary vacuum caused by insufficient suction and inhaled air. At this point should be adjusted to the relative height of the pump and oil surface to meet the requirements. ⑤ oil filter is clogged with dirt or its capacity is too small, resulting in increased suction resistance and inhalation of air; In addition, into the port of a larger caliber may also be brought into the air. At this point, you can clean the filter, or choose a larger capacity, and out of the appropriate diameter filter. In this way, not only can prevent the inhalation of air, but also to prevent noise. (2) Mechanical reasons (1) The connection between the pump and the coupling generates vibration and noise due to the non-compliance requirements. Should be required to adjust the coupling. ② due to dirt in the oil into the pump gear and other components caused by wear and tear and noise. Should replace the oil, strengthen the filter, open the pump cleaning; serious wear and tear of the gear, to be repaired or replaced. ③ parts pump damage or serious wear and tear will have vibration and noise: such as the tooth or the pitch error of large errors, poor contact between the two gears, tooth surface roughness, overhang length of the common law, the tooth backlash is too small, two meshing gear The contact area is not in the sub-round position. At this point, you can change the gear or the gear on the ground. At the same time, the bearing needle cage damage, the length of the shaft journal and needle wear, etc., can lead to poor bearing rotation and mechanical noise, this need to disassemble the gear pump, needle roller bearings replacement. ④ gear assembly gap is too small; gear end face and the front and rear end cover between the sliding surface due to the gear before the burr can not be carefully removed, thus running the joint surface injury, so that the internal leakage, leading to reduced output flow; The dirt enters the pump and wedges into the gap between the end face of the gear and the front and back end caps to strain the mating face, resulting in the communication of the high and low pressure cavities due to the radial tensioned groove, so that the output flow rate is reduced. The above measures should be used to repair the following measures. Disassemble the gear pump, appropriately increase the axial gap that is grinding the end face of the gear; with a surface grinder polished front and rear cover end face and the gear end face and remove gear on the burr (can not be chamfered); The depth of the unloading trough on the end face of the end cap will vary, and the width should be appropriately increased. (3) Other reasons High viscosity oil will also have noise, we must choose the right viscosity of the oil. 2, the lack of output flow ①high oil temperature will make its viscosity decreased, increased internal leakage, reducing the pump output flow. Should identify the reasons for taking measures; for medium and high pressure gear pump, the seal to be checked for damage. ② the viscosity of oil selection is too high or too low, will result in reduced pump output flow, the viscosity should be qualified oil. ③ CB-B gear pump generally can not be reversed, such as the pump body mounted anti-pressure pump will cause the cavity and the local short circuit to reduce or reduce the flow to the oil to. At this point, should check the pump steering. ④ engine speed is not enough, resulting in reduced traffic. Reason should be identified and be excluded. 3, poor rotation ①axial clearance or radial clearance is too small. Re-adjust and repair. ② pump dirt. Disintegrate to remove foreign matter. ③ assembly error. Gear pump two pin hole machining reference plane is not assembly datum, such as the first pin into, and then tighten the screw, the pump will not move. The correct way is to turn the gear pump while tightening the screws, and finally with the pin hole and into the pin. ④ pump and engine coupling coaxial poor. Coaxiality should be guaranteed within 0.1mm. ⑤ Pump parts are not demagnetized. All parts must be demagnetized before assembly. ⑥ needle sleeve failed quality or needle broken. Repair or replace. ⑦ work oil outlet is blocked. Remove foreign body. & nb