CN2592910Y - Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump - Google Patents

Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump Download PDF

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Publication number
CN2592910Y
CN2592910Y CN 02288401 CN02288401U CN2592910Y CN 2592910 Y CN2592910 Y CN 2592910Y CN 02288401 CN02288401 CN 02288401 CN 02288401 U CN02288401 U CN 02288401U CN 2592910 Y CN2592910 Y CN 2592910Y
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CN
China
Prior art keywords
main bearing
mechanical seal
pump
motor
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 02288401
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Chinese (zh)
Inventor
刘虎山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd
Original Assignee
SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd filed Critical SHANGHAI KAIQUAN PUMP (GROUP) CO Ltd
Priority to CN 02288401 priority Critical patent/CN2592910Y/en
Application granted granted Critical
Publication of CN2592910Y publication Critical patent/CN2592910Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an improved arrangement structure of a main bearing and a mechanical seal for a submersible pollution discharge pump, and the installation order from the side of a motor to the side of the pump is characterized in that a static ring assembly of a mechanical seal at the side of the motor is installed in a hole of a connecting seat, and a movable ring assembly of the mechanical seal at the side of the motor is installed on a shaft; a retainer ring is installed on the shaft, and one end surface of the retainer ring tightly leans against a shaft table shoulder and tightly leans against one side end surface of the movable ring assembly of the mechanical seal at the side of the motor; the other end surface of the retainer ring tightly leans against one end surface of an inner ring of a main bearing installed on the shaft, and an outer ring of the main bearing is installed in a hole of the side of a pump cover which faces to the motor, and the main bearing is placed in thin oil filled between the connecting seat and the pump cover; a static ring assembly of the mechanical seal at the side of the pump is installed in a hole of the pump cover facing to an impeller; the movable ring assembly of the mechanical seal at the side of the pump is installed on an outer circle of an impeller hub, and one side end surface of the movable ring assembly tightly leans against the bottom end face of the impeller hub. The utility model has the characteristics that the radial workload of the main bearing is reduced obviously, and the cooling lubricating condition of the main bearing is improved, so the service life of the main bearing is lengthened; the reliable axial positioning of the mechanical seal at the side of the motor is realized, so the vibration and leakage are decreased, and the reliability of a submersible motor is enhanced; the rigidity of the shaft extension is enhanced obviously, so the operation smoothness of the pump is enhanced.

Description

The modified model layout of the main bearing of proof submersible sand discharging pump and mechanical seal
Technical field
The utility model relates to proof submersible sand discharging pump, particularly the modified model layout of a kind of main bearing of proof submersible sand discharging pump and mechanical seal.
Background technique
The bearing of rotor pump and axle envelope are the highest parts of rate of fault.About bearing, the bearing of close impeller side will bear the joint load of axial force and radial force, and it is many that its duty ratio is distal to the bearing recuperation of impeller side, so it is a main bearing.The radial load of main bearing is relevant with axial distance between it and the impeller, and main bearing is near more from impeller, and its radial load is just light more.Because the impeller channel of pollution discharge pump is much wideer than clean waterpump, the Hydraulic Radial Force that it forms when work is than much bigger with the clean waterpump of lift, correspondingly the influence of life-span length to it is just bigger than clean waterpump to its radial load size apart from the distance of impeller for the main bearing of pollution discharge pump, so the main bearing of pollution discharge pump is near more good more from impeller; On the other hand, the effect that bearing adopts thin oil to carry out cooling and lubricating significantly is better than grease, so the particularly big main bearing of bearing should preferentially adopt thin oil to carry out cooling and lubricating under possible condition.The pump parts of proof submersible sand discharging pump conveying liquid and the mechanical seal between the submersible motor parts is the key of proof submersible sand discharging pump especially, the size of mechanical sealing leakage amount directly influences the reliability of submersible motor, and the vibration of the size of mechanical sealing leakage amount and axle has much relations, the shaft part that mechanical seal is installed is near more from main bearing, the vibration of this shaft part is just more little, and the leakage rate of mechanical seal is just more little.When adopting double-mechanical sealing, compare with the motor side mechanical seal that does not contact with the pump side mechanical seal that liquid of carrying and impurity wherein contact with liquid, its operating conditions is much abominable, easier leakage, and the pump side mechanical seal leakage also can worsen the operating conditions of motor side mechanical seal to the soiling solution in the grease chamber, makes motor side mechanical seal quicken to lose efficacy.Therefore reduce the leakage rate of mechanical seal, key is to reduce the leakage rate of pump side mechanical seal, so pump side mechanical seal ought to be nearest from main bearing.From the pump angle stably that turns round, the shaft extension from the main bearing to the impeller is short more, and its rigidity is strong more, and rotating component is not easy to rub with nonrotational part more during pump operation, and pump turns round steady more.
The main bearing of existing proof submersible sand discharging pump and the layout of mechanical seal are as shown in Figure 1, between pump side mechanical seal 1 and the main bearing 3 across motor side mechanical seal 2, gap between main bearing 3 and the impeller 4 between pump side mechanical seal 1, motor side mechanical seal 2 and positioning retainer ring 5 thereof and pump cover 6, because the restriction of this kind layout makes main bearing 3 can only adopt grease to carry out cooling and lubricating.
The main bearing of above-mentioned existing proof submersible sand discharging pump and the layout of mechanical seal make that the axial distance between main bearing and the impeller is big, employing be that grease rather than thin oil carry out cooling and lubricating, it has influenced the working life of main bearing.This kind layout makes that also the distance of pump side mechanical seal and main bearing is big, and by aforementioned principles, its leakage rate is just big.The axially locating precision of mechanical seal has considerable influence for the leakage rate of mechanical seal.Though positioning retainer ring 5 shown in Figure 1 can guarantee certain axially locating precision of motor side mechanical seal, but when assembling, need use assembly tooling, itself need carry out fastening to keep its axial position with axle, thereby guarantee the axial length of motor side mechanical seal, and bear the end thrust of motor side mechanical seal elastic element, in case fastening inefficacy, the dynamic and static ring end face of motor side mechanical seal will disengage, and causes a large amount of leakages.This kind layout, the shaft extension from the main bearing to the impeller is longer, when the Hydraulic Radial Force that forms when impeller is worked is big, friction or the collision and make the pump vibration easily of rotating component and nonrotational part.
Summary of the invention
Task of the present utility model provide a kind of main bearing of proof submersible sand discharging pump and mechanical seal the modified model layout, main bearing placed between motor side mechanical seal and the pump side mechanical seal, solved prior art and adopted the grease cooling and lubricating and influence a series of problems that main bearing working life, the easily a large amount of leakages of motor side mechanical seal, rotating component rub easily, collide and pump is vibrated with nonrotational part.
The technical solution of the utility model is as follows:
The modified model layout of a kind of main bearing of proof submersible sand discharging pump and mechanical seal is arranged as from the motor side to the pump side successively: the static components of motor side mechanical seal is installed in the hole of connection seat, and the moving ring assembly of motor side mechanical seal is installed on the axle; Back-up ring is installed on the axle, and an end face of back-up ring is close to the pillow block shoulder and is close to a side end face of motor side mechanical sealing linkage ring assembly, and another end face of back-up ring is close to an end face that is installed in the main bearing inner ring on the axle; The main bearing outer ring is installed in pump cover in the hole of motor side, and main bearing is in the thin oil that fills between connection seat and the pump cover; The static components of pump side mechanical seal is installed in pump cover in the hole of impeller, and the moving ring assembly of pump side mechanical seal is installed on the cylindrical of impeller hub and one side end face and impeller hub bottom end face are close to.
The utility model places main bearing between motor side mechanical seal and the pump side mechanical seal, has following advantage: 1. significantly reduced the axial distance between main bearing and the impeller; 2. main bearing carries out cooling and lubricating with thin oil; 3. significantly reduced the axial distance of pump side mechanical seal and main bearing; 4. realize the reliable axially locating of motor side mechanical seal.
Adopt modified model layout of the present utility model, the one, can significantly reduce the radially working load of main bearing, significantly improve the cooling and lubricating condition of main bearing, thereby prolong the operating life of main bearing; The 2nd, can realize the reliable axially locating of motor side mechanical seal, the shaft part that significantly reduces to install mechanical seal is particularly installed the vibratory output of the shaft part of pump side mechanical seal, thereby significantly reduce the particularly leakage rate of pump side mechanical seal of mechanical seal, improve the reliability of submersible motor; The 3rd, can significantly improve the rigidity of shaft extension, thereby strengthen the stationarity of pump operation.
Description of drawings
Fig. 1 is the schematic representation of the layout of the main bearing of existing proof submersible sand discharging pump and mechanical seal.
Fig. 2 is the schematic representation of the modified model layout of the main bearing of proof submersible sand discharging pump of the present utility model and mechanical seal.
Embodiment
Referring to Fig. 2, the utility model is a kind of main bearing of proof submersible sand discharging pump and the modified model layout of mechanical seal, and it comprises axle 1, connection seat 2, pump cover 3, main bearing 4, pump side mechanical seal 5, motor side mechanical seal 6, back-up ring 7 and impeller 8.
Be arranged as successively from the motor side to the pump side: the static components 61 of motor side mechanical seal 6 is installed in the hole 21 of connection seat 2, and the moving ring assembly 62 of motor side mechanical seal 6 is installed on the axle 1.Back-up ring 7 is installed on the axle 1, and an end face of back-up ring 7 is close to the shoulder 11 of axle 1 and is close to a side end face 621 of the moving ring assembly 62 of motor side mechanical seal 6, and another end face of back-up ring 7 is close to an end face 411 of the inner ring 41 of main bearing 4.The outer ring 42 of main bearing 4 is installed in pump cover 3 in the hole 31 of motor side, and an end face of the outer ring 42 of main bearing 4 contacts with the bottom end 311 in the hole 31 of pump cover 3, and main bearing 4 is in the thin oil that fills between connection seat 2 and the pump cover 3.The static components 51 of pump side mechanical seal 5 is installed in pump cover 3 in the hole 32 of impeller 8, the moving ring assembly 52 of pump side mechanical seal 5 is installed on the wheel hub cylindrical 82 of impeller 8 and the wheel hub bottom end face 83 of one side end face and impeller 8 is close to, this kind structure makes main bearing 4 shorter with the axial distance of impeller 8, is more suitable for using on the high-lift pump of big flow.
For movingly, be convenient to like this install between the endoporus of back-up ring 7 and the axle 1 corresponding shaft part.The diameter of an end face of back-up ring 7 is greater than the diameter of the end face 621 of the moving ring assembly 62 of motor side mechanical seal 6, so that dismounting main bearing 4.The diameter of another end face of back-up ring 7 is not less than the inner ring 41 needed minimum shoulder diameters of main bearing 4.During assembling, the inner ring 41 of main bearing 4 that becomes interference fit with axle 1 corresponding shaft part with back-up ring 7 axial compression on the shoulder 11 of motor shaft 1.
When pump work, the waterpower axial force that impeller 8 produces with back-up ring 7 together with main bearing 4 axial compression between the bottom end 311 in the hole 31 of the shoulder 11 of axle 1 and pump cover 3.Therefore, when assembling back-up ring 7, do not need to use frock to control its axial position, do not need to carry out fastening with axle 1 yet, it to the axially locating of motor side mechanical seal 6 do not exist because of with the fastening problem that gets loose and lost efficacy of axle 1, therefore there are not the problems that disengage and cause leaking in a large number in the dynamic and static ring end face of motor side mechanical seal 6 yet, so just improve the reliability of the axially locating of motor side mechanical seal 6, and then improved its sealing reliability.
Main bearing 4 carries out cooling and lubricating by the thin oil that fills between connection seat 2 and the pump cover 3, and the effect of cooling and lubricating is better than grease greatly, has significantly reduced the wearing and tearing of bearing thus, makes to obtain working life prolonging.

Claims (2)

1. the modified model layout of the main bearing of a proof submersible sand discharging pump and mechanical seal, it is characterized in that, be arranged as successively from the motor side to the pump side: the static components of motor side mechanical seal is installed in the hole of connection seat, and the moving ring assembly of motor side mechanical seal is installed on the axle; Back-up ring is installed on the axle, and an end face of back-up ring is close to the pillow block shoulder and is close to a side end face of motor side mechanical sealing linkage ring assembly, and another end face of back-up ring is close to an end face that is installed in the main bearing inner ring on the axle; The main bearing outer ring is installed in pump cover in the hole of motor side, and main bearing is in the thin oil that fills between connection seat and the pump cover; The static components of pump side mechanical seal is installed in pump cover in the hole of impeller, and the moving ring assembly of pump side mechanical seal is installed on the cylindrical of impeller hub and one side end face and impeller hub bottom end face are close to.
2. the modified model layout of the main bearing of proof submersible sand discharging pump according to claim 1 and mechanical seal, it is characterized in that, the endoporus of described back-up ring and the axle corresponding shaft part between for movingly, the diameter of an end face of back-up ring is greater than the diameter of the end face of motor side mechanical sealing linkage ring assembly, and the diameter of another end face of back-up ring is not less than the needed minimum shoulder diameter of main bearing inner ring.
CN 02288401 2002-12-18 2002-12-18 Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump Expired - Fee Related CN2592910Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02288401 CN2592910Y (en) 2002-12-18 2002-12-18 Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02288401 CN2592910Y (en) 2002-12-18 2002-12-18 Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump

Publications (1)

Publication Number Publication Date
CN2592910Y true CN2592910Y (en) 2003-12-17

Family

ID=33748305

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02288401 Expired - Fee Related CN2592910Y (en) 2002-12-18 2002-12-18 Improved arrangement structure of main bearing and mechanical sealing for submersible pollution discharge pump

Country Status (1)

Country Link
CN (1) CN2592910Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846085A (en) * 2010-06-08 2010-09-29 江苏大学 Frequency conversion high-speed wet type submersible pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846085A (en) * 2010-06-08 2010-09-29 江苏大学 Frequency conversion high-speed wet type submersible pump
CN101846085B (en) * 2010-06-08 2012-06-20 江苏大学 Frequency conversion high-speed wet type submersible pump

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C19 Lapse of patent right due to non-payment of the annual fee
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