CN210829786U

CN210829786U - High-pressure magnetic pump

Info

Publication number: CN210829786U
Application number: CN201921104845.XU
Authority: CN
Inventors: 金艳; 靳永强; 常焕良; ***
Original assignee: Dalian Metalworking Intelligent Equipment Technology Co ltd
Current assignee: Dalian Wanwangke Pump Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-06-23
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a high-pressure magnetic pump, wherein a magnetic driving part consists of an outer magnetic rotor body and an inner magnetic rotor body which are made of high-performance rare earth permanent magnets, and an isolation sleeve which is high-pressure resistant, corrosion resistant, thin in sleeve wall and small in eddy loss; the pump head part consists of a pressure-resistant welding pump body, an impeller, a guide vane, a sliding bearing body and a shaft. The motor drives the outer magnetic rotor body to rotate, the magnetic field penetrates through the air gap and the nonmagnetic substance to drive the inner magnetic rotor body connected with the impeller to synchronously rotate, the non-contact transmission of power is realized, and the dynamic seal is converted into the static seal. Because the pump shaft and the inner magnetic rotor body are completely sealed by the supporting frame and the isolating sleeve, and the special design of the isolating sleeve has high-strength bearing capacity, the problems of leakage, overflow, dripping and leakage are thoroughly solved, and the potential safety hazard of leakage caused by insufficient strength and poor pre-tightening effect of conveying inflammable, explosive, toxic and harmful high-pressure media on the bearing part in the oil refining chemical industry is eliminated.

Description

High-pressure magnetic pump

Technical Field

The utility model relates to a magnetic drive pump field especially relates to a high-pressure magnetic drive pump.

Background

The existing conventional magnetic pump adopts a common magnetic sealing device structure, and the common magnetic seal comprises an inner rotor body, an outer rotor body and an isolation sleeve. The inner rotor body and the outer rotor body are completely sealed and separated by the isolating sleeve, when the pump operates, the inner rotor body is completely immersed by a medium in the isolating sleeve, internal pressure is inevitably generated in the isolating sleeve, the internal pressure is equal to the pressure of a pumping medium, the isolating sleeve needs to well realize the sealing effect, the internal pressure of the pumping medium needs to be sufficiently borne, and the isolating sleeve is ensured not to deform and damage. The air gaps of the inner and outer magnetic rotor bodies directly influence the efficiency of the magnetic device, so that the air gaps cannot be infinitely increased, the isolating sleeve cuts magnetic induction lines in a magnetic field in the operation process of the pump, eddy currents are generated and are lost in the form of heat, the eddy currents are generally called eddy loss, the eddy loss is in direct proportion to the thickness of the isolating sleeve, the thickness of the isolating sleeve cannot be too thick, and otherwise, the efficiency of the magnetic device is greatly influenced. If the thickness of the isolation sleeve is too thin, the bearing capacity of the isolation sleeve is not ideal necessarily, the comprehensive performance of the material for manufacturing the isolation sleeve is required to be high, generally, metal stainless steel or alloy with non-magnetic conductivity is adopted, the strength of the isolation sleeve can meet the requirement under the ordinary working condition, but the pressure resistance is limited under the special working condition, and if the medium under the high-pressure working condition is conveyed, the reliability of the strength of the isolation sleeve can be difficult to realize by the ordinary magnetic sealing device. In the supporting mode, the sliding bearings are supported at multiple points and are fixed on the sliding bearing body, and the sliding bearing body is fixedly connected with the pump body, the connecting frame and the isolating sleeve, so that the operation rigidity of the rotor component is facilitated, the rotor component is small in bounce, small in vibration, small in noise and small in environmental influence. In the flushing mode, clean medium liquid is introduced into the flushing hole of the sliding bearing body to lubricate the sliding bearing, so that heat generated by vortex loss of the sliding friction pair and the isolation sleeve is taken away, cavitation generated by the medium in the isolation sleeve due to temperature rise and demagnetization failure of the magnetic coupling device are prevented, and the lubricating and cooling effects are achieved. The normal and safe operation of the pump is ensured. And an impeller nut with a locking structure is adopted at the impeller end, so that the safety of the pump is enhanced. The common magnetic pump body is formed by casting, deformation or leakage can not occur within 2.5Mpa, but under the high-pressure working condition, the defect of a casting part or the strength limit of selected materials is not enough to fear and is difficult to ensure. The special industry field requires equipment to ensure zero leakage and safety, especially for conveying flammable, explosive, toxic and strongly corrosive media, and further requires high strength, stability and safety of the equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-pressure magnetic drive pump for solve the common magnetic device pump of present use and have the problem that high entry pressure medium can not carry to harmful gas such as inflammable, explosive, hypertoxic, strong corrosivity, pollution.

In order to solve the technical problem, the utility model discloses mainly include pump, magnetic force actuator, motor triplex, its characterized in that: the pump comprises a pump body, a guide vane, a pump cover, a sliding bearing body, an impeller thrust disc, a pump shaft, a transmission shaft, a connecting frame, a sliding bearing, a sliding shaft sleeve, a thrust bearing assembly, a rolling bearing box, a deep groove ball bearing, a bearing front gland and a bearing rear gland; the pump body is formed by welding a forged piece and comprises an outlet flange connecting neck and a forged pump body, wherein after the outlet flange connecting neck and the forged pump body are respectively processed, liquid sealing welding is firstly carried out by utilizing argon arc welding, and then strength welding is carried out by utilizing electric welding; the guide vane is fastened on the sliding bearing body by utilizing an inner hexagon bolt; the connecting frame and the pump body clamp the sliding bearing body in the middle; the transmission shaft is fixed in the rolling bearing box by utilizing two deep groove ball bearings and is fastened with the connecting frame; the magnetic driver part consists of an outer magnetic rotor body, an inner magnetic rotor body and a non-magnetic isolation sleeve; the isolating sleeve is fastened on the sliding bearing body, the outer magnetic rotor body is connected on the transmission shaft, and the inner magnetic rotor body is arranged at the upper shaft end of the pump shaft; the motor drives the transmission shaft to rotate, the outer magnetic rotor body rotates synchronously, the magnetic field can penetrate through the air gap and nonmagnetic substances to drive the inner magnetic rotor body connected with the impeller to rotate synchronously, the non-contact transmission of power is realized, the dynamic seal is converted into static seal, each sealing element is composed of a metal tooth-shaped pad and a locking sealing structure, and the pump shaft and the inner magnetic rotor body are completely sealed by the sliding bearing body and the isolation sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. can thoroughly solve the problems of 'running, overflowing, dripping, leaking' and the like of high-pressure media.

2. The leakage problem of high-pressure and volatile flammable, explosive, highly toxic, highly corrosive, polluted and other gases in the use of the magnetic pump is effectively solved.

3. The potential safety hazards of deformation, leakage and leakage caused by high pressure of the medium passing through the pump body, the isolation sleeve, the static seal and other parts are eliminated.

Drawings

Fig. 1 is a schematic view of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-pump body, 11-metal tooth-shaped pad, 12-locking sealing structure, 19-spacer sleeve, 2-guide vane, 20-outer magnetic rotor body, 21-connecting frame, 22-inner magnetic rotor body, 26-bearing front gland, 31-rolling bearing box, 32-bearing rear gland, 36-transmission shaft, 38-deep groove ball bearing, 47-motor, 61-pump shaft, 62-sliding shaft sleeve, 63-sliding bearing, 65-sliding bearing body, 66-thrust bearing assembly and 7-impeller.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in the structure diagram of fig. 1, the utility model mainly comprises a pump, a magnetic driver and a motor, wherein the pump comprises a pump body 1, a guide vane 2, a pump cover, a sliding bearing body 65, an impeller 7 thrust disc, a pump shaft 61, a transmission shaft 36, a connecting frame 21, a sliding bearing 63, a sliding shaft sleeve 62, a thrust bearing component 66, a rolling bearing box 31, a deep groove ball bearing 38, a bearing front gland 26 and a bearing rear gland 32; the pump body 1 is formed by forge piece welding, wherein includes export flange joint neck and the forged pump body, and two parts have been processed respectively the back, utilize argon arc to weld earlier and seal liquid welding, then utilize electric welding to carry out the intensity welding, and the processing of polishing, destressing is formed at last, adopts forging technology to be favorable to improving the bearing capacity of the pump body 1, increases the bulk strength of the pump body 1. The guide vane 2 is fastened on the sliding bearing body 65 by utilizing the hexagon socket head cap screw, so that the water conservancy loss caused by directly impacting the pump body 1 after medium pressurization is reduced, and the effect of flow guiding is achieved. The connecting frame 21 and the pump body 1 clamp the sliding bearing body 65 in the middle, and the sliding bearing 63 and the sliding shaft sleeve 62 are arranged in the sliding bearing body 65 and on the pump shaft 61, so that supporting points are added, the bounce of a rotor part is reduced, the friction stress of the sliding bearing 63 and the sliding shaft sleeve 62 is reduced, and the service life is prolonged. The drive shaft 36 is fixed in the rolling bearing housing 31 by means of two deep groove ball bearings 38 and is fastened to the connecting frame 21.

The magnetic driver part is composed of an outer magnetic rotor body 20, an inner magnetic rotor body 22 and a non-magnetic separation sleeve 19. The spacer sleeve 19 is fastened to the sliding bearing body 65, the outer magnetic rotor body 20 is connected to the drive shaft 36, and the inner magnetic rotor body 22 is mounted on the upper shaft end of the pump shaft 61, so that the magnet parts form a complete coupled magnetic system. When the inner magnetic pole and the outer magnetic pole are opposite in heteropolarity, the magnetic energy of the magnetic system is the lowest; when the magnetic poles rotate to the same poles and are opposite, the magnetic energy of the magnetic system is maximum. After the external force is removed, the magnetic poles of the magnetic system repel each other, and the magnetic force can restore the magnet to the state with the lowest magnetic energy. The motor 47 drives the transmission shaft 36 to rotate, the outer magnetic rotor body 20 synchronously rotates, the magnetic field can penetrate through an air gap and nonmagnetic substances to drive the inner magnetic rotor body 22 connected with the impeller 7 to synchronously rotate, the non-contact transmission of power is realized, the dynamic seal is converted into static seal, each sealing element consists of a metal tooth-shaped pad 11, a locking sealing structure 12 and a pump shaft 61, and the inner magnetic rotor body 22 is completely sealed by the sliding bearing body 65 and the isolation sleeve 19. The isolation sleeve 19 needs to bear internal pressure and is made of high-strength materials, so that a medium with the pressure up to 12Mpa can be conveyed, the isolation sleeve is guaranteed not to deform, the pump body does not leak, and zero leakage is achieved.

In a supporting mode, the sliding bearing 63 is arranged on a sliding bearing body, and the sliding bearing body is tightly connected with the pump body 1, the connecting frame 21 and the isolating sleeve 19, so that the running rigidity of the rotor component is enhanced, and the jumping, vibration and noise are reduced. In the aspect of flushing, clean medium liquid is introduced from the pump cavity by utilizing the flushing holes of the sliding bearing body 65 to flush the sliding bearing 63, lubricate the sliding bearing 63, take away heat generated by the vortex loss of the sliding friction pair and the isolation sleeve 19, fully lubricate and cool the sliding bearing, and ensure the safe operation of the pump body 1. The magnetic driver part is composed of an outer magnetic rotor body 20, an inner magnetic rotor body 22 and a non-magnetic separation sleeve 19. The spacer sleeve 19 is fastened on the sliding bearing body 65 by a high-strength stud nut and a metal tooth-shaped gasket 11, so that the inner magnetic rotor body 22 and the outer magnetic rotor body 20 are completely separated. The isolation sleeve 19 is designed by high-strength titanium alloy, so that the isolation sleeve 19 is guaranteed not to deform and damage under the working condition of bearing high internal pressure. Because the titanium alloy has high strength and strong corrosion resistance, the thickness of the isolation sleeve is greatly reduced, the magnetic loss and the eddy loss are reduced, the overall efficiency of the pump is effectively ensured, and the energy loss cannot be increased due to the isolation sleeve 19. The outer magnetic rotor body 20 is directly connected to a transmission shaft 36, the transmission shaft 36 is supported by two cylindrical roller bearings, lubricating oil is filled in a rolling bearing box 31 to lubricate a rolling bearing, and the transmission shaft 36 is connected with a motor through a diaphragm coupling. The inner magnetic rotor body 22 is directly fixed on the pump shaft by a key groove and a locking nut. n pairs of magnets (n is an even number) are regularly arranged and assembled on an inner magnetic rotor body 22 and an outer magnetic rotor body 20 of the magnetic driver, so that the magnet parts mutually form a complete coupled magnetic system. When external force is applied, the inner magnetic pole and the outer magnetic pole are opposite in heteropolarity, namely the displacement angle phi between the two magnetic poles is 0, and the magnetic energy of the magnetic system is the lowest at the moment; when the magnetic poles rotate to the same poles and are opposite, namely the displacement angle phi between the two magnetic poles is 2 pi/n, the magnetic energy of the magnetic system is maximum, and the magnet moves to drive the magnetic rotor to rotate. After the external force is removed, the magnetic force can restore the magnet to the state of lowest magnetic energy because the magnetic poles of the magnetic system repel each other, and the magnetic rotor is still along with the disappearance of the external force. When the motor drives the outer magnetic rotor body 20 to rotate, the magnetic field can penetrate through the air gap and nonmagnetic substances to drive the inner magnetic rotor body 22 connected with the impeller 7 to synchronously rotate, so that power is transmitted without contact, and dynamic sealing is converted into static sealing. Because the pump shaft 61 and the inner magnet rotor body 22 are completely sealed by the sliding bearing body 65 and the isolation sleeve 19, the pressure bearing capacity is very high, the isolation sleeve 19 and the sealing assembly cannot be deformed or broken due to high pressure when high-pressure media are pumped, and zero leakage can be realized.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Various modifications and improvements made to the technical solution of the present invention by those skilled in the art are intended to fall within the scope of the present invention as defined in the appended claims. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A high-pressure magnetic pump mainly comprises a pump, a magnetic driver and a motor, and is characterized in that: the pump comprises a pump body, a guide vane, a pump cover, a sliding bearing body, an impeller thrust disc, a pump shaft, a transmission shaft, a connecting frame, a sliding bearing, a sliding shaft sleeve, a thrust bearing assembly, a rolling bearing box, a deep groove ball bearing, a bearing front gland and a bearing rear gland; the pump body is formed by welding a forged piece and comprises an outlet flange connecting neck and a forged pump body, wherein after the outlet flange connecting neck and the forged pump body are respectively processed, liquid sealing welding is firstly carried out by utilizing argon arc welding, and then strength welding is carried out by utilizing electric welding; the guide vane is fastened on the sliding bearing body by utilizing an inner hexagon bolt; the connecting frame and the pump body clamp the sliding bearing body in the middle; the transmission shaft is fixed in the rolling bearing box by utilizing two deep groove ball bearings and is fastened with the connecting frame; the magnetic driver part consists of an outer magnetic rotor body, an inner magnetic rotor body and a non-magnetic isolation sleeve; the isolating sleeve is fastened on the sliding bearing body, the outer magnetic rotor body is connected on the transmission shaft, and the inner magnetic rotor body is arranged at the upper shaft end of the pump shaft; the motor drives the transmission shaft to rotate, the outer magnetic rotor body rotates synchronously, the magnetic field can penetrate through the air gap and nonmagnetic substances to drive the inner magnetic rotor body connected with the impeller to rotate synchronously, the non-contact transmission of power is realized, the dynamic seal is converted into static seal, each sealing element consists of a metal tooth-shaped pad and a locking sealing structure, and the pump shaft and the inner magnetic rotor body are completely sealed by the sliding bearing body and the isolation sleeve.