CN2371372Y - Handy detachable vertical multi-stage centrifugal pump - Google Patents

Abstract

The utility model discloses a vertical multistage centrifugal pump capable of easy disassembly, which is composed of a motor, a motor bracket, a pump shaft, a water outlet section, a middle section, a water inlet section, etc., wherein, the water outlet section, the middle section, and the water inlet section are connected mutually. The utility model is characterized in that the motor bracket is a window frame type bracket; the lower end of an output shaft of the motor is provided with a motor shaft coupling; the upper end of the pump shaft is provided with a pump shaft coupling; the two shaft couplings are mutually connected by a middle shaft coupling; the lower part of the pump shaft coupling is also provided with a bearing box, a sealing body, and a balance body which are sheathed mutually. The utility model can repair and replace easy damaged parts rapidly and conveniently and can effectively extend the service life and the operation performance of the easy damaged parts.

Description

The vertical multistage centrifugal pump of just tearing open

The utility model relates to a kind of improvement of vertical sections centrifugal pump.

Existing by vertical machine, as DL series vertical multi-stage centrifugal pump commonly used, its vertical machine output shaft is through a shaft joint, directly be connected with pump shaft, though vertical many groups of this structure are centrifugal show simple in structure, manufacture cost is lower, but easily worn parts such as maintenance or replacing balancing drum, balance set extremely bother, must use heavy lifting appliance, pull down vertical machine, support and water exit end etc. from top to bottom successively, just can overhaul or change easily worn part, and Sealing is because of directly dismounting, easily influence sealability, so that the complete machine working efficiency is reduced.

The purpose of this utility model provides a kind of maintenance and changes easily worn parts such as balancing drum, balance set and Sealing very convenient, can exempt to use lifting appliance, keeps favorable sealing property, the vertical multistage centrifugal pump of just tearing open of long service life.

The utility model comprises motor 16, electric machine support 15, pump shaft 21, is positioned at electric machine support 15 bottoms and interconnective water exit end 9, stage casing 4 and inlet segment 1, and its major technique is characterized as: A, said electric machine support 15 are the window frame cribbing.The output shaft lower end of B, motor 16 is provided with motor coupler 32, and the lower end of pump shaft 21 is provided with pump coupling 30, and this two coupling is connected through intermediate shaft coupling 31.Between C, the pump coupling 30 bottoms final stage stator 8 to the water outlet section of going out 9, be provided with from bottom to top socket and removable bearing box 13, seal 12 and balanced body 11 mutually.

Be provided with a pair of angular contact ball bearing 27 in the said bearing box 13, be provided with a cover super-short balanced seal body 25 in the seal 12, be provided with the quiet dish 24 of hydraulic thrust balance in the balanced body 11.

Major advantage of the present utility model is: when needs overhaul or change all very convenient, fast to three big easily worn parts such as bearing, mechanical seal and hydraulic thrust Balance discs.Need not to pull down earlier motor, electric machine support and water exit end, as long as use light instruments such as spanner, directly pull down intermediate shaft coupling, the pump coupling that connects successively in the window frame cribbing and pull down bearing box, seal, balanced body and hydraulic thrust balance Moving plate, just can to bearing, mechanical seal and not the thrust-balancing dish overhaul or change.The utility model can prolong the working life and the service behaviour of hydraulic thrust balance and mechanical seal effectively, improves overall efficiency.The utility model is particularly suitable as high building feed water pump and fire extinguishing pump.

Accompanying drawing 1 is the utility model structural representation.

Accompanying drawing 2 is the utility model coupling composite structure schematic representation.

Accompanying drawing 3 is bearing box, seal, balanced body combination assumption diagram.

Among the figure: 1---inlet segment, 2---seal ring, 3---impeller, 4---the stage casing, 5---key, 6---stator, 7---the stator cover, 8---the final stage stator, 9---water exit end, 10---water injecting pipe, 11---balanced body, 12---seal, 12 ' stud bolt, 13---bearing box, 13 ' fixing bolt, 14---bearing gland, 15---electric machine support, 16---motor, 17---the lower bearing body, 18---back-up ring, 19---Lower shaft sleeve, 20---bearing shell, 21---pump shaft, 22---stay-bolt, 23---hydraulic thrust balance Moving plate, 24---the quiet dish of hydraulic thrust balance, 25---mechanical seal, 26---Upper shaft sleeve, 27---bearing, 28---long nut, 29---nut, 30---pump coupling pump, 30 '---the steel column fixing bolt, 31---intermediate shaft coupling, 31 '---steel column bolt, 31 "---spring column pin nut, 32---motor coupler; 32 '---spring column pin, 32 "---the spring column pin nut.

Following structure accompanying drawing further describes the utility model.

Referring to accompanying drawing one, motor 16 is a power source of the present utility model, is installed in electric machine support 15 tops, uses bolt.Water exit end 9 tops are connected next coming in order socket stage casing 4 and inlet segment 1 with bolt with electric machine support 15.The quantity in stage casing 4 can be according to selecting the pump stage number to decide, and mostly being ten grades of pumps most is to add an inlet segment and a water exit end by 9 stage casings, and 11 sections are formed altogether.Each sections is by the seam socket, respectively establishes " O " a RunddichtringO, and each section is tightened to an integral body by four stay-bolts 22 that branch is located at water exit end and inlet segment four bights on seam.Stator 6 is located in stage casing 4 and the water exit end 9 with impeller 3, no impeller 3 and stator 6 in the inlet segment 1, and the final stage stator 8 no anti-blades in water exit end 9 first chambeies so that high pressure water directly enters water-supplying chamber from this stator, are discharged from exhaust port again.Pump shaft 21 is fixed in the center hole of bearing box by thrust-bearing 27.The lower end of pump shaft 21 is fixed on the central part of lower bearing body 17 through water lubrication bearing shell 20, the middle part serial connection impeller 3 of pump shaft 21.Be positioned at the bottom of pump because of inlet segment 1, this district is the low pressure pool, water exit end 9 is positioned at the top of pump, this district is the high pressure pool, the pump axial force is downward, the utility model adopts hydraulic thrust Balance disc 23,24 to come the most of downward axial force of balance in high pressure pool water exit end 9, and remaining a spot of axial force is supported by bearing 27.The exhaust port direction can be decided to be identical with the suction port direction on demand, perhaps become 90 °, 180 ° and

270 °, water injecting pipe 10 also can be selected to become 90 °, 180 ° and 270 ° with suction port, install in three orientation, therefore, need respectively establish a water injecting pipe interface at 90 ° of direction places, both sides of inlet segment 1 suction port, 90 ° of direction places respectively establish a water injecting pipe interface in water exit end 9 exhaust port both sides, and 180 ° of direction places establish a water injecting pipe and connect on the water outlet opposite, obsolete water injecting pipe interface is all with the sealing of plug double-screw bolt, with anti-leak.

Referring to accompanying drawing two, the top of intermediate shaft coupling 31 and motor coupler 32 usefulness spring column pins 32 ' are connected and fixed, and bottom and pump coupling 30 usefulness steel column bolts 30 ' are fixing.Pump coupling 30 adopts loose fits with pump shaft 21, and in order to strengthen connecting of pump coupling 30 and pump shaft 21, the spy adds a steel column fixing bolt 30 '.In maintenance or when changing the big easily worn part of bearing 27, mechanical seal 25 and the hydraulic thrust Balance disc 23,24 etc. three of pump, at first pull down spring column pin nut 32 " and pull down spring column pin 32 '; after pull down spring column pin nut 31 on the steel column bolt 31 ' " and pull down steel column bolt 31 ', unscrew steel column fixing bolt 30 ' again, with pump coupling 30 screens that moves down, at this moment intermediate shaft coupling 31 translations can be taken out, at last pump coupling 30 taking-up that moves up.Overhauling or more finishing changing easily worn part, in the time of installing coupling, only needing be undertaken by above-mentioned opposite step.

Referring to accompanying drawing three, the top of seal 12 and bearing box 13 usefulness bolts 13 ' are fixedly connected, and the bottom connects with balanced body 11, and seal 12 and balanced body 11 is fixed in together the top of water exit end 9 with stud bolt 12 '.Long nut 28 is to play the effect that compresses Upper shaft sleeve 26 and hydraulic thrust balance Moving plate 23, and nut 29 is effects of playing fixed length nut 28.In maintenance or when changing three big easily worn parts, at first pulling down intermediate shaft coupling 31 and pump coupling 30 later carrying out.Tear open earlier after nut 29 and the long nut 28, pull down fixing bolt 13 ' earlier, take out bearing box 13 again, pull down stud bolt 12 ', can take out seal 12 and balanced body 11 respectively, take out hydraulic thrust balance Moving plate 23 at last, and can be respectively to a pair of angular contact ball bearing 27 in the bearing box 13, super-short balancing machine sealing 25 in the seal 12, easily worn parts such as quiet dish 24 of hydraulic thrust in the balanced body 11 and hydraulic thrust balance Moving plate 23 overhaul or change.As long as connecing above-mentioned opposite step during installation carries out.

Claims (2)

1, a kind of vertical multistage centrifugal pump of just tearing open comprises motor (16), electric machine support (15), and pump shaft (21) is positioned at electric machine support (15) bottom also interconnective water exit end (9), stage casing (4) and inlet segment (1), it is characterized by:

A, said electric machine support (15) are the window frame cribbing.

The lower end of the output shaft of B, motor (16) is provided with motor coupler (32), pump shaft (21) be provided with pump coupling (30), motor coupler (32) is connected through intermediate shaft coupling (31) with pump coupling (30).

Be provided with between C, pump coupling (30) the bottom final stage stator (8) to the water exit end (9) from mutual socket and removable bearing box (13), seal (12) and balanced body (11) down.

2, by the described vertical multistage centrifugal pump of just tearing open of claim 1, it is characterized by, be provided with a pair of angular contact ball bearing (27) in the bearing box (13), be provided with a cover super-short balanced seal body (25) in the seal (12), be provided with the quiet dish of hydraulic thrust balance (24) in the balanced body (11).

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