I. Overview
D-type pump multi-stage, segmented centrifugal water pump, suitable for mining, factories and urban water supply, drainage. For delivery without solid particles and abrasive. Clear water without suspended solids, or other liquids with physical and chemical properties similar to clear water. Liquid temperature is transported in the -20 ℃ ~ 80 ℃.
Second, the model description
1) Example 150D30X5 150 - Pump suction inlet diameter (mm) D-multistage, segmented centrifugal water pump 30-single-stage lift is 30m 5- pump series is 5 2) Example D 280-43X5 D-multistage , Segmented centrifugal water pump 280 - pump flow (m3 / h) 43 - 43m single-stage lift 5-pump series of 5
Third, the structure description
1, the pump casing Part of the pump casing mainly by the bearing, the front section, the middle section, the rear section, the guide vane and other bolts together into a whole, the front suction inlet midline was horizontal, the rear vomit outlet midline and horizontal.
2, part of the rotor rotor mainly consists of bearings and mounted on the shaft of the impeller, bushings, balance disc and other components. The shaft parts are tightened with plain keys and sleeve nuts to make them integral with the shaft. The entire rotor is supported on the pump housing by a double-ended bearing. The number of impellers in the rotor section depends on the number of stages of the pump.
3, the bearing part of the D-type pump bearings have two kinds of sliding bearings and rolling bearings, depending on the model, are not subject to axial force. The pump should allow the rotor part to move axially in the pump housing during operation, and radial bearings can not be used. 4, the pump seal Pump front, middle, back sealing between the surface are made of molybdenum disulfide grease seal between the rotor part and the fixed part by the seal ring, guide vane sets, packing seal, seal ring and guide vane Set of wear has affected the pump work and performance should be promptly replaced.
5, balance mechanism Balanced by the balance ring, balance plate, balance sleeve and other components, balance mechanism used to balance the pump axial force. In the following operating procedures, note the "caution" "caution" "caution" tagline, which is intended to emphasize the safety and proper operation and maintenance of the key words, the meaning of the interpretation is as follows:
WARNING: WARNING RISK OF INJURY OR DEATH CAUSED BY OPERATION PROCEDURES, HABITS, OR OTHER DAMAGES CAUTION: CAUTION: OPERATING PROCEDURES, HABITS, OR OTHER IT MAY CAUSE DAMAGE TO EQUIPMENT CAUSED: PROCEDURES, CONDITIONS, ETC. After the arrival of the goods inspection, the equipment should be immediately accepted, due to any defects caused by shipment should be reported immediately to the carrier. Instructions and packing slips for instruction manuals and other parts (such as motors) should be kept in a safe and convenient place for your reference.
Fifth, pump assembly and disassembly
1, the pump assembly The quality of the D-type pump assembly directly affect the pump can operate normally and affect the pump life and performance parameters; affect the unit vibration and noise, the assembly should pay attention to the following points:
a. The concentricity of the fixed parts after the combination of parts is ensured by the manufacturing precision and assembly quality of the parts. The processing precision and surface roughness of the parts should be guaranteed. The touching and scratching of the parts should not be allowed. Molybdenum disulfide used as a sealant should be clean. Tightening screws, bolts should be force evenly.
b, impeller outlet flow path and guide vane inlet flow channel is dependent on the axial size of the parts to ensure that. The quality of the flow channel has a direct impact on the performance of the pump, so the pump size can not be adjusted.
c, After the pump is assembled, before turning on the filler, turn the pump rotor by hand to check whether the pump rotor rotates freely in the housing and whether the axial movement meets the specified requirements.
d, the above inspection meets the requirements, add packing at the shaft seal at both ends of the pump, pay attention to the relative position of the packing rings in the packing room.
2, the pump removal
a, demolition to be carried out in the reverse order with the assembly, demolition should be strictly protected parts manufacturing accuracy from damage. b, remove the wear bar should be the first cushion with the middle pad, so as not to loosen the middle of the stop after the shaft bending. Six, the pump installation
The D-type pump installation in addition to meet the general installation of technical requirements, but also should note the following:
1, When the combination of motor and pump is installed, the axial end of pump coupling should be pulled out axially and the gap value of 2-3mm end should be left to ensure the axial clearance between the two couplings of pump and motor.
Note: Make sure the floor is level and the equipment level is good. CAUTION: CAUTION: For the installation to be successful, the coupling adjustment must be correct and the flexible coupling can not compensate. Changsha Zhongda Pump Industry Co., Ltd.
Any obvious imbalance. Misalignment can cause rapid wear, noise, vibration, and damage to the equipment. Therefore, the coupling must be adjusted within the limits given.
Caution: Caution: Measures must be taken to support the pump inlet and outlet piping to prevent excessive pump loading and unloading
2, pump and motor shaft center line should be in the same horizontal line.
3, the pump can only withstand its own internal forces, can not afford any external force.
Seven, pump start, run, stop pump start, run,
(A) start:
WARNING: For operator's safety reasons, do not exceed the conditions of the pump nameplate in order to avoid endangering the safety of the equipment and the operator. To ensure the smooth operation and maintenance of pumps and other movements, please refer to the instructions.
1, the pump should be operated before the first rotor, check the rotor is flexible.
2, check the motor steering is consistent with the pump steering.
3, close the pump outlet gate valve, pressure gauge cock, with the delivery of liquid or vacuum system to exclude the suction tube and the body of the air pump (no empty car start running).
4, check the pump and motor coupling bolt tightness and safety around the pump, so that the pump is ready to start.
WARNING: WARNING: EQUIPMENT OPERATES AFTER FOCUSING THE COUPLING SHIELD. Ignoring this point can result in personal injury or death.
5, start the pump, to be normal operation of the pump, open the pressure gauge cock, slowly open the outlet gate valve, press the outlet pressure gauge to control the pump given head.
(B) run:
1, The D-type pump balances the axial force by the internal balance mechanism, the balance device has a balanced liquid outflow, the balance liquid is connected to the suction section from the balance water pipe or a short pipe at the balance room, the balance liquid flows to the pump through the short pipe, In order to ensure the normal operation of the pump, balanced water pipes must not be blocked.
2, the D-type pump bearing no cooling device, bearing temperature changes reflect the assembly quality of the pump, the bearing temperature not higher than the ambient temperature 35 ℃, the maximum temperature should not be higher than 75 ℃.
WARNING: WARNING: Handling equipment that is not properly lubricated may cause bearing heating, breakage, pump stalls, and equipment damage, as well as causing personal injury to the operator.
3, the D-type pump rotor in operation there is a certain axial swimming, the motor and the pump should ensure that the gap between the two coupling end face value.
4, the pump should be checked during operation impeller, seal ring, guide vane sets, balance disc, sleeve wear, excessive wear should be promptly replaced.
WARNING: WARNING: DO NOT ATTEMPT TO REPAIR, MAINTENANCE OR CLEANING IN THE ROTARY MACHINE AS NEVER HAZARD OPERATOR'S PERSONAL SAFETY.
5, the user should be based on the specific circumstances set out a more detailed operating procedures.
(C) Parking: stop the pressure gauge cock before closing, and then slowly close the exit gate valve until the exit gate valve is closed to stop the motor.
Eight, the pump may occur and the solution
1. Fault table and the pointer of the vacuum gauge instrument leaks vigorously
2, the pump does not absorb water, the vacuum at the end of the valve is not open or blocked; suction correction or replacement of the valve; cleaning or more table shows a high degree of resistance to vacuum water resistance; suction height is too large for suction pipe; reduce the suction height exceeds the allowable value
3, look at the pressure gauge pump water outlet pipe resistance is too large; rotation direction to check or shorten the water pipe; change the electricity at pressure, and the pump is still wrong; impeller silt; pump speed steering; impeller cleaning; increase the water does not water
4, the flow is less than expected not enough; speed is not big enough water pump to increase the speed of the pump shaft ring; increase the speed of the pump shaft hit the party; replace the impeller; regulate the gate valve to reduce traffic
6, the pump in the course of the work of the valve open too much; suction resistance to adjust the gate valve to reduce the flow; check for abnormal sound, flow is too large; in the water absorption of air seepage water pipe; check the bottom valve; reduce the decline until no water; Flat into; absorbent height is too large; the suction height of the transport; tighten or plug the leakage device early wear and tear
7, pump vibration
8 bearing overheated liquid temperature is too high Centerline axis is not at a centerline; reduce liquid temperature alignment Quasi-pump shaft and the motor axis is not in the same pump and motor shaft centerline without oil or oil dirty; pump shaft and Electric oil or oil change; the shaft center line on the pump silt; seal ring wear and tear over the pump and pipe cleaning;
Rain Boots,Rain Boots Women,Ugg Rain Boots,Kids Rain Boots
Dongguan JinYe Sports Apparatus Co., Ltd , https://www.yuwos.com