CN211116617U

CN211116617U - Go up multistage magnetic drive pump of going out from top to bottom

Info

Publication number: CN211116617U
Application number: CN201921901038.0U
Authority: CN
Inventors: 栾晓颖; 钱运德; 黄昕昱; 师勇
Original assignee: Dalian Jinshi Pump Co ltd
Current assignee: Dalian Jinshi Pump Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-28
Anticipated expiration: 2029-11-06

Abstract

The utility model provides an upper-inlet upper-outlet multistage magnetic drive pump, belongs to magnetic drive pump technical field, magnetic drive pump axial sets gradually slide bearing, impeller, slide bearing, and two slide bearings set up respectively at the both ends of pump shaft, and the impeller setting is in the middle of the pump shaft, magnetic drive pump's interior magnetic rotor tail end links to each other with the pump shaft tail end. Through set gradually slide bearing, impeller, slide bearing with the magnetic pump axial, reasonable bearing span makes radial load distribution more even, reduces the concentration of stress on the pump shaft, improves its fatigue strength. The tail end of the inner magnetic rotor is connected with the tail end of the pump shaft, so that the length of the pump shaft is shortened, the amplitude of the pump shaft generated in the operation process is reduced, and the pump operates more stably. And a hole is formed in the pump shaft, and the circulation loop of the pump is changed into an upward-out mode.

Description

Go up multistage magnetic drive pump of going out from top to bottom

Technical Field

The utility model belongs to the technical field of the magnetic drive pump, specifically be an enterprising go up out multistage magnetic drive pump.

Background

The inner magnetic rotor and the medium are completely isolated from the outside by the isolating sleeve component in the magnetic pump, so that the problems of leakage, overflow, dripping and leakage of the mechanical seal pump in the chemical process are fundamentally solved, and no leakage is realized. The sliding bearing adopted by the magnetic pump is lubricated and cooled by the conveyed medium, and no additional lubricating oil or cooling water system is needed, so that the energy consumption is reduced. Can be used for conveying toxic, flammable and explosive, volatile, corrosive, radioactive and other liquid media and is widely applied to the fields of chemical industry, petrochemical industry, medicine, textile, nuclear power, refrigeration and the like.

When the impeller of the magnetic pump is two or more than two, the pump is called a multistage magnetic pump, and the multistage magnetic pump is used under the working condition of high lift. The arrangement positions of the impeller and the sliding bearing of the magnetic pump with the common structure on the pump shaft are the impeller-sliding bearing from left to right in sequence. The arrangement mode lengthens the cantilever of the shaft along with the increase of the impeller stage number, the radial load born by the pump shaft is increased, the shaft generates larger deflection, and the shaft sleeve and parts on the shaft are damaged due to friction. Meanwhile, for a rotating shaft, the radial force is an alternating load, and the larger radial force can cause the shaft to be damaged due to fatigue.

SUMMERY OF THE UTILITY MODEL

The utility model provides an enterprising multistage magnetic drive pump of going up out through setting gradually slide bearing, impeller, slide bearing with the magnetic drive pump axial, reasonable bearing span makes radial load distribute more evenly, reduces the concentration of the epaxial stress of pump, improves its fatigue strength. The tail end of the inner magnetic rotor is connected with the tail end of the pump shaft, so that the length of the pump shaft is shortened, the amplitude of the pump shaft generated in the operation process is reduced, and the pump operates more stably. And a hole is formed in the pump shaft, and the circulation loop of the pump is changed into an upward-out mode.

The utility model adopts the following technical scheme:

the utility model provides an upper entry goes out multistage magnetic drive pump, the magnetic drive pump axial sets gradually slide bearing, impeller, slide bearing, and two slide bearings set up respectively at the both ends of pump shaft, and the impeller setting is in the middle of the pump shaft, the interior magnetic rotor tail end and the pump shaft tail end of magnetic drive pump link to each other.

Furthermore, the magnetic pump is provided with a first hole above the bearing front cover, an eleventh hole on the front side of the suction section, a second hole above the first middle section shell, a third hole and a fourth hole respectively on the upper side and the right side of the discharge section, a fifth hole above the bearing frame, a ninth hole below the bearing frame, a sixth hole above the right end surface and an eighth hole below the right end surface, a seventh hole and a tenth hole in the axial direction and the radial direction of the pump shaft, wherein the first hole and the second hole are connected through a first circulating pipe, the eleventh hole and the fourth hole are connected through a second circulating pipe, and the third hole and the fifth hole are connected through a third circulating pipe.

The utility model discloses an advantage and effect do:

the arrangement positions of the impeller-sliding bearing in sequence from left to right are adjusted into the sliding bearing-impeller-sliding bearing by adjusting the installation positions of the sliding bearing and the impeller. The reasonable bearing span makes the radial load distribution more uniform, reduces the stress concentration on the pump shaft and improves the fatigue strength. The tail end of the inner magnetic rotor is connected with the tail end of the pump shaft, so that the length of the pump shaft is shortened, the amplitude of the pump shaft generated in the operation process is reduced, and the pump operates more stably. And a hole is formed in the pump shaft, and the circulation loop of the pump is changed into an upward-out mode.

Drawings

Fig. 1 shows the utility model relates to an upper inlet and upper outlet multistage magnetic drive pump.

The components in the figure: 1 is a pump inlet, 2 is a pump outlet, 3 is a discharge section, 4 is a bearing front cover, 5 is a first circulation pipe, 6 is a first hole, 7 is a second circulation pipe, 8 is a second hole, 9 is a first middle section housing, 10 is a third hole, 11 is a third circulation pipe, 12 is a fourth hole, 13 is a fifth hole, 14 is a sixth hole, 15 is an inner magnet rotor, 16 is a seventh hole, 17 is a second sliding bearing assembly, 18 is an eighth hole, 19 is a ninth hole, 20 is a bearing bracket, 21 is a balance disk, 22 is a third impeller, 23 is a second middle section housing, 24 is a second impeller, 25 is a pump shaft, 26 is a first impeller, 27 is a tenth hole, 28 is a first sliding bearing assembly, 29 is an eleventh hole, 30 is a suction section, 31 is a first cavity, and 32 is a twelfth hole.

Detailed Description

The novel product is described in detail below with reference to the attached drawings.

The bearing structure is characterized in that a first hole 6 is formed above a bearing front cover 4, an eleventh hole 29 is formed in the front side of an intake section 30, a second hole 8 is formed above a first middle section shell 9, third holes 10 and fourth holes 12 are formed above and on the right side of a discharge section 3 respectively, a fifth hole 13 is formed above a bearing frame 20, a ninth hole 19 is formed below the bearing frame, a sixth hole 14 is formed on the upper side of the right end face, an eighth hole 18 is formed on the lower side of the right end face, a seventh hole 16 and a tenth hole 27 are formed in the axial direction and the radial direction of a pump shaft 25. The first well 6 is connected to the second well 8 by the first circulation tube 5, the eleventh well 29 is connected to the fourth well 12 by the second circulation tube 7, and the third well 10 is connected to the fifth well 13 by the third circulation tube 11.

The main circulation of the pump is that the medium enters the pump cavity from the pump inlet 1 and passes through the first impeller 26, the second impeller 24 and the third impeller 22 and then goes out of the pump outlet 2. The medium passes through the first impeller 26 with a portion flowing from the second aperture 8 through the first circulation tube 5, the first aperture 6 into the bearing front cover 4 to lubricate and cool the first plain bearing assembly 28, and then back to the inlet of the first impeller 26. The medium in the first chamber flows from the fourth orifice 12 through the second circulation tube 7, the eleventh orifice 29 back to the pump body inlet, which circulation can balance the axial forces by means of the balancing disk 21. A part of the medium flows through the third circulation pipe 11 and the sixth hole 14 from the third hole 10, and returns to the inlet of the second impeller 24 through the seventh hole 16, the twelfth hole 32 and the tenth hole 27. This circulation carries away some of the heat generated by the drive assembly magnetic eddy current losses and lubricates and cools the second plain bearing assembly 17.

Claims

1. The utility model provides an upper-inlet upper-outlet multistage magnetic drive pump which characterized in that: the magnetic pump is characterized in that a sliding bearing, an impeller and a sliding bearing are sequentially arranged in the axial direction of the magnetic pump, the two sliding bearings are respectively arranged at two ends of the pump shaft, the impeller is arranged in the middle of the pump shaft, and the tail end of an inner magnet rotor of the magnetic pump is connected with the tail end of the pump shaft.

2. An on-top-out multistage magnetic pump as claimed in claim 1, wherein: the magnetic drive pump sets up first hole in bearing protecgulum top, sets up the eleventh hole in inhaling the section front side, sets up the second hole in first middle section casing top, sets up third hole, fourth hole respectively in spitting out section top and right side, sets up the fifth hole in the bearing bracket top, the downside that the ninth hole was seted up to the below, right-hand member face is seted up the sixth hole, the eighth hole is seted up to the downside of right-hand member face, sets up the seventh hole in pump shaft axial and radial, the tenth hole, first hole and second hole link to each other through first circulating pipe, eleventh hole and fourth hole link to each other through the second circulating pipe, third hole and fifth hole link to each other through the third circulating pipe.