CN110242596A - A kind of high pressure magnetic drive pump - Google Patents

Abstract

The invention discloses a kind of high pressure magnetic drive pump, outer magnet rotor body that Magnetic driving part is made by high-performance rare-earth permanent-magnetic, interior magnet rotor body and it is high pressure resistant, corrosion-resistant, jacket wall is thin, whirlpool is damaged small separation sleeve and formed；Pump head part is made of the pressure resistance welding pump housing, impeller, guide vane, the body of sliding bearing, axis.Motor drives outer magnet rotor body rotation, magnetic field penetration air gap and namagnetic substance, drives the interior magnet rotor body being connected with impeller to make synchronous rotary, realizes the non contact transmission of power, convert static seal for dynamic sealing.Since pump shaft, interior magnet rotor body are supported frame, separation sleeve completely encloses, and the special designing of separation sleeve has high-intensitive bearing capacity, so thoroughly solve the problems, such as " run, drip, leak ", eliminates in oil-refining chemical industry and cause the security risk of leakage intensity on pressure-containing member is inadequate and pretensioning effect bad when because conveying inflammable, explosive, toxic, harmful high-pressure medium.

Description

A high pressure magnetic pump

technical field

The invention relates to the field of magnetic force pumps, in particular to a high-pressure magnetic force pump.

Background technique

The existing conventional magnetic pump adopts a common magnetic seal device structure, and the common magnetic seal includes an inner rotor body, an outer rotor body, and a spacer sleeve. The isolation sleeve seals and separates the inner and outer rotor bodies completely. When the pump is running, the medium in the isolation sleeve completely submerges the inner rotor body, and there must be internal pressure inside. This internal pressure is equal to the pressure of the pumped medium. The isolation sleeve must be very To achieve a good sealing effect, it must be able to withstand the internal pressure of the pumped medium to ensure that the isolation sleeve is not deformed or damaged. Since the air gap between the inner and outer magnetic rotor bodies will directly affect the efficiency of the magnetic device, the air gap cannot be increased infinitely. During the operation of the pump, the isolation sleeve cuts the magnetic induction line in the magnetic field, and eddy currents will be generated, which will generate heat. Formal loss is usually called eddy loss, and eddy loss is proportional to the thickness of the spacer, so the thickness of the spacer should not be too thick, otherwise it will have a great impact on the efficiency of the magnetic device. If the thickness of the isolation sleeve is too thin, its pressure bearing capacity will inevitably be unsatisfactory. This requires the material of the isolation sleeve to have high comprehensive performance. Generally, metal stainless steel or non-magnetic alloy is used. Under normal working conditions, the isolation sleeve The strength of the sleeve can meet the requirements, but the pressure resistance is still limited under special working conditions. For example, when conveying medium under high-pressure conditions, it may be difficult for ordinary magnetic seal devices to achieve reliable strength of the isolation sleeve. In terms of support, sliding bearings are used for multi-point support. The sliding bearings are fixed on the sliding bearing body, and the sliding bearing body is tightly connected with the pump body, connecting frame, and spacer sleeve. Small vibration, low noise, and little impact on the environment. In the flushing method, the clean medium liquid is introduced through the flushing hole of the sliding bearing body to lubricate the sliding bearing, and the heat generated by the sliding friction pair and the eddy loss of the isolation sleeve is taken away, and the cavitation and magnetic force of the medium due to the temperature rise in the isolation sleeve are prevented. The demagnetization failure of the coupling device plays the role of lubrication and cooling. Ensure the normal and safe operation of the pump. The impeller nut with anti-loosening structure is used at the impeller end to enhance the safety of the pump. The pump body of ordinary magnetic pump is made of casting, and generally there will be no deformation or leakage within 2.5Mpa, but under high pressure conditions, it may be difficult to guarantee it due to casting defects or insufficient strength limit of the selected materials. Special industry fields not only require equipment to ensure zero leakage but also to ensure its safety, especially the transportation of flammable, explosive, toxic, and strong corrosive media requires high strength, stability and safety of equipment.

Contents of the invention

The purpose of the present invention is to provide a high-pressure magnetic pump to solve the problem that the common magnetic device pumps currently used cannot transport flammable, explosive, highly toxic, highly corrosive, polluting and other harmful gases with high inlet pressure media.

In order to solve the above technical problems, the present invention mainly includes three parts: a pump, a magnetic drive, and an electric motor. Shaft, connecting frame, sliding bearing, sliding bushing, thrust bearing assembly, rolling bearing box, deep groove ball bearing, bearing front gland, bearing rear gland; the pump body is welded by forgings, including the outlet flange connection neck After the forged pump body, the outlet flange connection neck and the forged pump body are processed separately, first use argon arc welding for sealing liquid welding, and then use electric welding for strength welding; the guide vane is fastened to the sliding bearing body with hexagon socket bolts; 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 two deep groove ball bearings, and is fastened with the connecting frame; the magnetic drive part is composed of an outer magnetic rotor body and an inner magnetic rotor body and a non-magnetic isolation sleeve; the isolation sleeve is fastened on the sliding bearing body, the outer magnetic rotor body is connected to the transmission shaft, and the inner magnetic rotor body is installed on the upper shaft end of the pump shaft; the motor drives the transmission shaft to rotate, The outer magnetic rotor body rotates synchronously, and the magnetic field can penetrate the air gap and non-magnetic substances, driving the inner magnetic rotor body connected to the impeller to rotate synchronously, realizing the non-contact transmission of power, and converting the dynamic seal into a static seal. Metal tooth pad, locking and sealing structure, pump shaft and inner magnetic rotor body are completely sealed by sliding bearing body and spacer sleeve.

Compared with prior art, the beneficial effect of the present invention:

1. It can completely solve the problems of "running, popping, dripping, and leaking" in high-pressure media.

2. It effectively solves the leakage problem of high-pressure and volatile flammable, explosive, highly toxic, highly corrosive and polluting gases in the use of magnetic pumps.

3. Eliminate the potential safety hazards of deformation, leakage and leakage that occur through the pump body, isolation sleeve, static seal and other components due to the high pressure of the medium.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1-pump body, 11-metal tooth pad, 12-locking and sealing structure, 19-isolation 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 bushing, 63-sliding bearing, 65 - sliding bearing body, 66 - thrust bearing assembly, 7 - impeller.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "inner", "outer" and the like are based on the orientations or positional relationships shown in the accompanying drawings , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element 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 should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the simplified structure diagram of the present invention as shown in Figure 1, the present invention mainly comprises pump, magnetic drive, motor three parts, and described pump comprises by pump body 1, guide vane 2, pump cover, sliding bearing body 65, impeller 7 Thrust plate, pump shaft 61, transmission shaft 36, connecting frame 21, sliding bearing 63, sliding bushing 62, thrust bearing assembly 66, rolling bearing housing 31, deep groove ball bearing 38, bearing front gland 26, bearing rear pressure The cover 32 is composed of; the pump body 1 is welded by forgings, including the outlet flange connection neck and the forged pump body. After the two parts are processed separately, they are first welded by argon arc welding, and then welded by electric welding for strength. Finally, it is processed by grinding and stress relief. The forging process is beneficial to improve the pressure bearing capacity of the pump body 1 and increase the overall strength of the pump body 1 . The guide vane 2 is fastened on the sliding bearing body 65 with hexagon socket bolts, which reduces the water loss caused by the direct impact of the medium on the pump body 1 after pressurization, and plays the role of diversion. The connecting frame 21 and the pump body 1 clamp the sliding bearing body 65 in the middle, while the sliding bearing 63 and the sliding bushing 62 are installed in the sliding bearing body 65 and the pump shaft 61 to increase the supporting point, so that the rotor parts reduce the beating , reducing the friction force of the sliding bearing 63 and the sliding bushing 62, prolonging the service life. Transmission shaft 36 utilizes two deep groove ball bearings 38 to be fixed in the rolling bearing box 31, and is fastened with connecting frame 21.

The magnetic drive part is composed of an outer magnetic rotor body 20 , an inner magnetic rotor body 22 and a non-magnetic isolation sleeve 19 . The spacer sleeve 19 is fastened on the sliding bearing body 65, the outer magnetic rotor body 20 is connected to the transmission shaft 36, and the inner magnetic rotor body 22 is installed on the upper shaft end of the pump shaft 61, so that the magnet parts form a complete coupled magnetic system with each other. . When the inner and outer magnetic poles are opposite to each other, the magnetic energy of the magnetic system is the lowest; when the magnetic poles rotate to the same polarity, the magnetic energy of the magnetic system is the largest. After removing the external force, the magnetic poles of the magnetic system repel each other, and the magnetic force will restore the magnet to the state with the lowest magnetic energy. The motor 47 drives the transmission shaft 36 to rotate, and the outer magnetic rotor body 20 rotates synchronously. The magnetic field can penetrate the air gap and non-magnetic substances, and drives the inner magnetic rotor body 22 connected with the impeller 7 to rotate synchronously, so as to realize the non-contact transmission of power. The dynamic seal is converted into a static seal. Each seal is composed of a metal toothed pad 11, a locking seal structure 12, and a pump shaft 61. The inner magnetic rotor body 22 is completely sealed by the sliding bearing body 65 and the spacer sleeve 19. The isolation sleeve 19 needs to withstand internal pressure, and is made of high-strength material, so it can transport medium with a pressure up to 12Mpa, ensuring that the isolation sleeve does not deform, the pump body has no leakage, and zero leakage is achieved.

In terms of support, the sliding bearing 63 is installed on the sliding bearing body, and the sliding bearing body is tightly connected with the pump body 1, the connecting frame 21, and the spacer sleeve 19, so as to enhance the operating rigidity of the rotor parts and reduce beating, vibration and noise. In terms of flushing, use the flushing hole of the sliding bearing body 65 to introduce clean medium liquid from the pump chamber to flush the sliding bearing 63, lubricate the sliding bearing 63, and take away the heat generated by the vortex loss of the sliding friction pair and the spacer sleeve 19 to make it fully lubricated and cooling, to ensure the safe operation of the pump body 1. The magnetic drive part is composed of an outer magnetic rotor body 20 , an inner magnetic rotor body 22 and a non-magnetic isolation sleeve 19 . Spacer cover 19 adopts high-strength stud nut and metal tooth-shaped gasket 11 to be fixed on sliding bearing body 65, and inner magnetic rotor body 22 and outer magnetic rotor body 20 are completely separated. The isolation sleeve 19 is designed and made of high-strength titanium alloy, which ensures that the isolation sleeve 19 is not deformed or damaged under high internal pressure conditions. Because the titanium alloy has high strength and strong corrosion resistance, the thickness of the isolation sleeve is greatly reduced, the magnetic loss and eddy loss are reduced, and the overall efficiency of the pump is effectively guaranteed without increasing energy loss due to the isolation sleeve 19. The outer magnetic rotor body 20 is directly connected to the transmission shaft 36. The transmission shaft 36 is supported by two cylindrical roller bearings. The rolling bearing box 31 is filled with lubricating oil to lubricate the rolling bearings. The transmission shaft 36 is connected to the motor through a diaphragm coupling. . The inner magnetic rotor body 22 is directly fixed on the pump shaft by key grooves and lock nuts. N pairs of magnets (n is an even number) are regularly arranged and assembled on the inner magnetic rotor body 22 and the outer magnetic rotor body 20 of the magnetic drive, so that the magnet parts form a complete coupled magnetic force system with each other. When the external force is applied, the inner and outer magnetic poles are opposite to each other, that is, the displacement angle between the two magnetic poles Φ = 0, and the magnetic energy of the magnetic system is the lowest at this time; when the magnetic poles rotate to the same pole, that is, the displacement angle between the two magnetic poles Φ=2π/n, at this time the magnetic energy of the magnetic system is the largest, and the magnet generates motion, which drives the magnetic rotor to rotate. After the external force is removed, because the magnetic poles of the magnetic system repel each other, the magnetic force will restore the magnet to the state with the lowest magnetic energy, and the magnetic rotor will also stand still with the disappearance of the external force. When the motor drives the outer magnetic rotor body 20 to rotate, the magnetic field can penetrate the air gap and non-magnetic substances, and drive the inner magnetic rotor body 22 connected to the impeller 7 to rotate synchronously, realizing the non-contact transmission of power and converting the dynamic seal into a static seal. Since the pump shaft 61 and the inner magnetic rotor body 22 are completely enclosed by the sliding bearing body 65 and the spacer sleeve 19, the pressure bearing capacity is very high, so the spacer sleeve 19 and the sealing assembly will not be deformed or broken due to high pressure when pumping high-pressure medium , can achieve zero leakage.

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

Claims (1)

1. It mainly include pump, magnetic driver, motor three parts 1. a kind of high pressure magnetic drive pump, it is characterised in that: the pump includes By the pump housing, guide vane, pump cover, the body of sliding bearing, thrust of impeller disk, pump shaft and transmission shaft, connection frame, sliding bearing, sliding shaft sleeve, Gland, bearing rear pressing cover composition before thrust bearing component, antifriction-bearing housing, deep groove ball bearing, bearing；The pump housing by forging weld and At, including outlet(discharge) flange connection neck and the forging pump housing, after outlet(discharge) flange connection neck processes respectively with the forging pump housing, first with argon Arc-welding carries out sealing liquid welding, then carries out strength solder joints using electric welding；Guide vane is fastened on the body of sliding bearing using hexagon socket head cap screw On；The body of sliding bearing is clipped in the middle by connection frame and the pump housing；Transmission shaft is fixed on antifriction-bearing housing using two deep groove ball bearings It is interior, it is fastened with connection frame；The magnetic driver part is by outer magnet rotor body, interior magnet rotor body and non-magnetic separation sleeve group At；Separation sleeve is fastened on the body of sliding bearing, and outer magnet rotor body is connected on transmission shaft, and interior magnet rotor body is mounted on the upper of pump shaft Shaft end；The motor drives transmission shaft rotation, and outer magnet rotor body synchronous rotary, magnetic field energy penetrates air-gap and nonmagnetics Matter drives the interior magnet rotor body being connected with impeller to make synchronous rotary, realizes the non contact transmission of power, convert dynamic sealing to quiet Sealing, each sealing element are made of tooth profile metal pad, lock sealing structure, and pump shaft, interior magnet rotor body are by the body of sliding bearing, separation sleeve It is completely enclosed.