Type D horizontal multi-stage pump assembly, disassembly and installation instructions

Type D horizontal multistage pump is a kind of a lot of wide range of general machinery and equipment, for conveying not containing solid particles and abrasive, not water containing suspended solids, or other physical and chemical properties similar to Yu Qingshui liquid. The temperature of the liquid to be delivered in - 20℃~80℃。 Widely used in petroleum, chemical, electric power, metallurgy, mining, shipbuilding, light industry, agriculture, civil and defense departments, occupies an important position in national economy.

D type horizontal multi-stage pump assembly

horizontal multi-stage pump assembly sequence in contrast to the disassembly sequence in general. Assembly quality directly affect the pump can run normally, and affect the service life of the pump and the performance parameters. When assembling, should pay attention to the following:

1) Fixed part after the parts combination of concentricity by precision parts manufacturing and assembly quality assurance, should protect the parts machining accuracy and surface roughness, are not allowed to have bruising, scratches etc. Phenomenon, be sealed with sealing parts will clean, tighten the screws and bolts should stress evenly.

       （ 2) Export runner and guide vane impeller inlet port to the neutral is in accordance with the axial size to ensure that all parts, the stand or fall of port to neutral directly affect the performance of the pump, we cannot adjust the size of the pump.

       （ 3) assembly has been completed, in before loading packing, turn the pump rotor by hand, check whether in the pump rotor rotating flexible, axial channeling momentum whether meet the specified requirements;

       （ 4) After the inspection requirements, adding filler on both ends of pump shaft seal, pay attention to the packing ring relative position in the packing room.

D type horizontal multi-stage pump remove

remove to order in contrast to the assembly, disassembly should strictly protect parts manufacturing precision is not damaged. Removing wear rod should use the middle cushion pad, so as to avoid the middle seam allowance loose after sinking shaft bending.

1, D type horizontal multi-stage pump remove items that should be paid attention to when

1) Parking in the parking order;

       （ 2) Liquid in the pump housing ( Including the cooling water) Should be put off; When bearing components is thin oil lubrication, should put off lubricating oil;

       （ 3) Down impede remove the attached pipeline, such as balance pipe, water pipe line and the lead;

       （ 4) Should strictly protect the removed parts manufacturing precision is not damaged, remove the tie rod colleague should use the middle block padding, in order to avoid the middle check loose mouth sinking shaft bending.

2, D type horizontal multistage pump disassembly sequence

1) After coupling, unscrewing out side bearing bolt on the end cover and water period, end cap, bearing body between the three components of joint bolt, unloaded and bearing end cover, bearing body bearing parts;

       （ 2) Turn round nut on the shaft under and in accordance with the bearing inner ring, bearing gland and collar, remove packing ( Including the packing gland, packing ring, packing, etc) Or mechanical seal parts;

       （ 3) In turn to unload a O ring on the shaft, shaft sleeve, the balance disc peace key, unload the water at the end of the period, guide vane, gimbal ring sets, etc. ;

       （ 4) After peace key level at the end of the impeller, landed in the middle, guide vane; According to this, in turn, remove the impeller at all levels, middle, and guide vane, until grade impeller before unloaded;

       （ 5) After unloading pump coupling, unscrewed the fill section and bearing body coupling nut and bearing gland bolts on after discharged water period of side bearing parts;

       （ 6) The shaft from the water pumped section, fixed nut on the screw shaft under, in turn bearing inner ring, type O sealing ring, shaft sleeve off;

       （ 7) Using sliding bearing of the pump, the disassembly sequence are basically the same, only when removing the bearing components is slightly different.

D type horizontal multi-stage pump installation

when this type of pump is installed in addition to satisfy the general requirements, should also pay attention to the following:

1, the installation of pump plane level shall be the basis of the leveling. After foundation of cement solidification, should check whether the base and anchor bolt hole is loose.

2, motor, pump and base after assembly, should strictly check the pump shaft and motor shaft concentricity, ensure that the two axis on the same axis;

3, motor and pump assembly, the pump shaft coupling end to outside should be pulled out, ensure the pump and motor end of the half coupling axial clearance value;

4 and pump can only carry their own pressure, can't bear any outside force, so the pump suction pipe and pressure pipe should have their own support, in order to avoid the water pump pressure.

5, is used to contain flammable and explosive gas mine run under the dmo type pump, explosion-proof motor and must be used with the corresponding explosion-proof grade and explosion-proof marks.

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