CN1151480A - Magnetic driving gear for pump - Google Patents

Abstract

A magnetic driver for pump is an improved planar disk type of magnetic driver, and features that plane-type isolating disk is used to enclose medium overcurrent plane, the combined axial bearing mechanism is used to increase the axial bearing power of isolating disk, and a circulating loop is used to lubricate and cool the overcurrent part. It can be used to deliver corrosion liquid, noble liquid and oil with simple structure, reliable sealing, high working pressure.

Description

A kind of pump magnetic driving equipment

The utility model relates to coupling, the coupling of particularly a kind of plane disc type magneto drive.

The magnetic drives technology since have significantly can stop to run, prosperous, drip, leakage and energy-efficient superiority, in all trades and professions, especially obtained practical application in the conveying of strongly corrosion liquid, precious liquid and the oils of industries such as oil, chemical industry, pharmacy, plating and refrigeration.The magnetic drives technology can be divided into plane disc type magnetic transmission and garden cylinder cartridge type magnetic transmission two classes on its structure, though the former is simple in structure, but owing to be difficult to solve on the life-span scheduling theory of axial bearing capacity, bearing of choose reasonable, the separator of the suction-combining force between two disks and the ratio between the torsion and a structural difficult problem, and be subjected to the cold reception of domestic and international Business circle; Though the latter is widespread usage already because its complex structure, bulky, must cause again product make maintenance, cost cost and failure-free operation cycle guarantee etc. certain degree of difficulty has appearred on the significant problem.Model utility CN91217470.6.The practical plan to plane disc type magnetic transmission structure that proposes in " the totally-enclosed transmission device of submersible machine " is that the guide has been started in plane disc type magnetic transmission, and means are provided.But this model utility still has some limitation and deficiency at its application category with on the problems such as decay resistance of the rational deployment of the ability of bearing working voltage of some structural design such as separator, medium flow-passing surface, flow-passing surface parts.

The purpose of this utility model is to provide a kind of follow-on pump magnetic driving equipment.It both had simple in structure, cost is low and make characteristics easy to maintenance, has wide, the ability of bearing axial working voltage that can be higher of application category again, and can realize the advantage of safe operation over a long time in the conveying of all kinds of strong corrosive medias.

The utility model is realized with following technical proposals:

The pump magnetic driving equipment, mainly by flat separator, plane disc type magneto drive system and planar disk formula magnetic force servo system are formed, flat separator is clamped at the connecting part of driven chamber shell and link press span, the rear end at its peripheral position also is fitted with stationary seal ring, plane disc type magneto drive system is fixed on the tail end of live axle, it is by driving disk cartridge, drive magnet ring, bearing and pressure-bearing garden dish are formed, plane disc magnetic servo system directly is hinged with on driven shaft, it is mainly by driven disk cartridge, driven magnet ring, bearing is formed, the tail end of driven shaft with impeller nut fastening the afterbody impeller of pump, it is characterized in that directly communicating with pump housing inner chamber by the through hole that is positioned on the shell rear wall of driven chamber by the driven chamber that described flat separator and driven chamber shell are formed, the rear end of driven magnet ring is provided with a yoke, driven magnet ring and yoke are made sealed envelope and are formed driven magnet ring assembly by matrix jacket and base ring, driven magnet ring assembly is fastened on the driven disk cartridge, flat separator be a kind of will be by link press span, the isolating plate that flat sealing cuts off is made in actuator chamber that flat separator is formed and driven chamber, it forms by a slice or the thin plate more than a slice are folded mutually, also presses formula simultaneously at its front end at peripheral position and is fitted with the pressure-bearing packing ring.Driving disk bearing and driven disk bearing is thrust-bearing, and they are close to the both sides in the axle center of flat separator.The rear end central authorities of driven disk cartridge also are provided with axial retaining abrading block.Driven shaft and impeller nut all offer central through bore, and the front end of driven shaft also offers ball chamber or the poor cinclides that communicates of liquid with driven thrust-bearing.

Because the difference of the corrosivity state of the medium carried, comprise the parts of all surface contact medium of flat separator in driven chamber in the utility model and the pump housing inner chamber (general designation flow-passing surface), make by specific resistant material.Driven thrust axis is promised and is selected the ball thrust bearing of specific corrosion resistance for use or offer the poor slide thrust bearing of liquid.When the medium of being carried was not had corrosivity, then all parts can be made with general material in the flow-passing surface.Can omit base ring and yoke in the driven magnet ring assembly of this moment, and directly driven magnet ring is contained on the driven disk cartridge.Driven disk cartridge is made by ferrous material, directly replaces the effect of yoke; The driven thrust-bearing of this moment can be selected thrust ball bearing for use.

The utility model technology can also adopt following easy structure in the practical application of small-sized and micropump:

In practical application to micropump, owing to drive disk and do to have good radially autostability the synchronous high-speed rotation following from movable magnetic disc, so can omit driven shaft and radial sliding bearing; The through hole of former driven chamber shell is enlarged, make driven chamber and pump housing inner chamber merge into a chamber; With driven chamber shell directly and the pump housing be connected as a single entity, like this, link press span can directly be connected with the pump housing.Meanwhile, can also omit in the driven magnet ring assembly base ring and with the driven disk cartridge of driven magnet ring, yoke, matrix jacket, band center hole directly and impeller fuse.In practical application,, can dispense pressure-bearing garden dish and will drive thrust-bearing and directly carry on the back the top separator because the garden of magnet ring week size is little to small-sized and micropump; Also can be connected as a single entity by the ear end face pressure-bearing packing ring is direct and link press span.

Good effect of the present utility model is:

1, directly supporting assurances because the magnetic gap after the relative coupling of two disks is two thrust-bearings by both sides, separator center, so not only making, installation, maintenance are conveniently, but also is reducing of total magnetic gap, and the saving significantly of magnetic material provides possibility.

2, relatively coupling and two plane type disks that two thrust axis make intermediate support are arranged in doing the synchronous high-speed rotation has radial and axial stability reliably.This lays a solid foundation for the reliable and secure operation of this device.

3, since be positioned at the separator front end pressure-bearing garden dish, drive setting up of sinciput formula pressure-bearing mechanism that thrust-bearing and pressure-bearing packing ring formed, make the area and the span at the compressive deformation position of separator reduce to inferior limit.Therefore, the ability of bearing working pressure of this device can surpass garden cylinder cartridge type magnetic drives structure.

4, the fault-free safe operation cycle is long.Because this device is in operation, the relative coupling holding force between two disks and the axial compression power of thrust-bearing have obtained significantly removing; Add driven thrust-bearing and drive the lubricated and cooling that thrust-bearing can obtain institute's fed sheet of a media and machinery oil respectively, therefore, in this device can determination device proper functioning life-span of two thrust-bearings of operating life, improve more than 30% than the existing garden cylinder cartridge type magnetic drive middle (center) bearing life-span.

5, this device has looping back slightly of unique fed sheet of a media, and this not only can satisfy the lubricated and cooling of friction parts, in case can also take away the heat that electric convolution is caused when separator is metallic material rapidly.This has further guaranteed the long-term normal operation of this device again.

6, the comparable existing device of the axial installation dimension of this device shortens 50%, saves resistant material and permanent-magnet material more than 20%.

Below in conjunction with accompanying drawing embodiment of the present utility model is further described:

Accompanying drawing 1 is the structural representation that the utility model is used for single stage centrifugal pump.

Accompanying drawing 2 is easy structure schematic representation that the utility model is used for single stage centrifugal pump.

In the embodiment of accompanying drawing 1 expression, drive motor (18), plane disc type magneto drive system, flat separator (25), plane disc magnetic servo system, driven shaft (32), impeller (2) are arranged on same shaft axis in proper order.Drive motor (18) fuses by link press span (16) and driven chamber shell (8), the pump housing (1).Pressure-bearing packing ring (12), flat separator (25) and stationary seal ring (11) have been compressed in the connecting part of link press span (16) and driven chamber shell (8).Connecting part at the driven chamber shell (8) and the pump housing (1) is pressed with stationary seal ring (7).Plane disc type magneto drive system is positioned at actuator chamber (22), it is made up of driving disk cartridge (14), driving magnet ring (13), driving thrust-bearing (23), pressure-bearing garden dish (24), and it is by nut (17), retaining (21) and be good for the tail end that (20) are fastened on motor driving shaft (19).The motion block that drives thrust-bearing (23) is installed in irony and drives in the bearing support of disk cartridge (14), is pressed with pressure-bearing garden dish (24) on quiet.The ear end face of pressure-bearing garden dish (24) and the front-end face of separator (25) are close to.Offer oil hole (15) around the bearing support of driving disk cartridge (14).Plane disc magnetic servo system is positioned at driven chamber (5), and it is made up of driven disk cartridge (30), driven magnet ring assembly (9,27,28,29), driven thrust-bearing (10), retaining abrading block (6), and is fastened on the driven shaft (32) with strong pin formula.Driven magnet ring assembly (9,27,28,29) is formed by driven magnet ring (9), yoke (28), matrix jacket (27) and base ring (29) suit and sealing, and it is fastened to the front end of driven disk cartridge (30) with bolt.Retaining abrading block (6) is equipped with at place, driven disk cartridge (30) axle center, rear end, and the motion block of driven thrust-bearing (10) is housed in the bearing support at its place, front end axle center.Driven thrust-bearing (10) quiet packaged in the bearing support of separator (25) ear end face.Have through hole (31) on the rear wall of driven chamber shell (8), radial sliding bearing (4) is equipped with at its place, axle center.Middle cellular type driven shaft (32) offers cinclides (26) in the corresponding part that ball chamber or liquid with driven thrust-bearing (10) are pickled with grains or in wine, and is fastened with impeller (2) at its tail end with impeller nut (36) and the retaining (34) of being with central through bore.On the pump housing (1) and the impeller matching part seal ring (35) is housed, discharge opeing screw (33) also is equipped with in the lower end.

Easy structure shown in the accompanying drawing 2 is applicable to miniature pump and micropump.In this kind easy structure, omitted original driven shaft (32) and radial sliding bearing (4), the through hole (31) on former driven chamber shell (8) rear wall has been enlarged, made driven chamber (5) and pump housing inner chamber (3) merge into same cavity; Make former driven chamber shell (8) directly and the pump housing (1) be connected as a single entity; Link press span (16) directly is connected with the pump housing (1).Simultaneously, omitted original base ring (29), and with the driven disk cartridge (30) of driven magnet ring (9), yoke (28), matrix jacket (27), band center hole directly and impeller (2) fuse.In actuator chamber, omitted original pressure-bearing garden dish (24), be close to and will drive the direct and separator (25) of quiet of thrust-bearing (23); And with former pressure-bearing packing ring (12) directly and link press span (16) fuse.

That the simple and easy plane of this kind disc type magnetic driving equipment can make is small-sized, the miniature magnetic pump structure is simpler, uses to install more conveniently, and its cost of production can be on the original basis that reduces significantly, further reduce 10%.

Claims (4)

1, a kind of pump magnetic driving equipment, mainly by flat separator (25), plane disc type magneto drive system and planar disk formula magnetic force servo system are formed, flat separator (25) is clamped at the connecting part of driven chamber shell (8) and link press span (16), the rear end at its peripheral position also is fitted with stationary seal ring (11), plane disc type magneto drive system is fixed on the tail end of live axle (19), it is by driving disk cartridge (14), drive magnet ring (13), bearing (23) and pressure-bearing garden dish (24) are formed, plane disc magnetic servo system directly is contained on the driven shaft (32), it is mainly by driven disk cartridge (30), driven magnet ring (9), bearing (10) is formed, the tail end of driven shaft (32) with impeller nut (36) fastening the afterbody impeller (2) of pump, it is characterized in that the driven chamber of being made up of described flat separator (25) and driven chamber shell (8) (5) directly communicates with pump housing inner chamber (3) by the through hole (31) that is positioned on driven chamber shell (8) rear wall, the rear end of driven magnet ring (9) is provided with a yoke (28), driven magnet ring (9) and yoke (28) are made sealed envelope and are formed driven magnet ring assembly (9 by matrix jacket (27) and base ring (29), 27,28,29), driven magnet ring assembly (9,27,28,29) be fastened on the driven disk cartridge (30), flat separator (25) be a kind of will be by link press span (16), the actuator chamber (22) that flat separator (25) is formed is made the isolating plate that flat sealing cuts off with driven chamber (5), it forms by a slice or the thin plate more than a slice are folded mutually, also presses formula simultaneously at its front end at peripheral position and is fitted with a pressure-bearing packing ring (12).

2, pump magnetic driving equipment according to claim 1 is characterized in that said driving disk bearing (23) and driven disk bearing (10) are thrust-bearing, and they are close to the both sides in flat separator (25) axle center.

3, pump magnetic driving equipment according to claim 1 is characterized in that the rear end central authorities of said driven disk cartridge (30) also are provided with an axial retaining abrading block (6).

4, according to claim 1 and the described pump magnetic driving equipment of claim 2, it is characterized in that said driven shaft (32) and impeller nut (36) all offer central through bore, the front end of driven shaft (32) also offers ball chamber or the poor cinclides (26) that communicates of liquid with driven thrust-bearing (10).

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