CN108799187A - A kind of backlash compensation structure of magnetic drive pump bearing - Google Patents

Abstract

The invention discloses a gap compensation structure of a magnetic pump bearing, which comprises a first rolling bearing and a second rolling bearing installed between a main shaft and a main shaft sleeve, and the main shaft sleeve is also installed with a bearing for accommodating the first rolling bearing and the second rolling bearing. Adjusting sleeves, adjusting springs are installed between the outer circumferences of the first rolling bearing and the second rolling bearings and the inner wall of the adjusting sleeves, and steel balls are arranged between the adjusting springs and the first rolling bearings and the second rolling bearings. The beneficial effects of the present invention are: steel balls After receiving the force of the adjusting spring, give the first rolling bearing and the second rolling bearing an elastic preload in the axial direction, so that after the first rolling bearing and the second rolling bearing or the main shaft are worn, the first rolling bearing and the second rolling bearing can still It is in good contact with the main shaft. At the same time, the axial compensation spring acts between the rotor and the input shaft, which can eliminate the axial gap or axial movement of the rotor and ensure the smooth operation of the magnetic pump.

Description

A Clearance Compensation Structure for Magnetic Pump Bearings

technical field

The invention relates to the technical field of magnetic pumps, in particular to a gap compensation structure for magnetic pump bearings.

Background technique

Magnetic pump is a high-tech product that applies the working principle of permanent magnet coupling to centrifugal pump. Its structure generally consists of pump body, impeller, pump cover, outer magnetic rotor and transmission parts, inner magnetic rotor, thrust ring, isolation sleeve , Pump shaft, shaft sleeve, bearing, motor and so on. The inner and outer magnetic rotors are separated by a non-magnetic isolation sleeve, and the isolation sleeve and the pump cover are fastened with a gasket. The inner magnetic rotor connected to the impeller is driven by the outer magnetic rotor connected to the motor through the action of the magnetic field, so that the pump realizes fully sealed and leak-free media delivery.

Both sides of the inner magnetic rotor have a first sliding bearing and a second sliding bearing respectively. The first sliding bearing and the second sliding bearing have the same structure, and both have radial sliding bearings and thrust sliding bearings. The radial sliding bearings play a supporting role. The role of rotor rotation, thrust sliding bearings play a role in restricting axial movement, requiring thrust bearings not only have good wear resistance and hardness, but also must have high compressive strength, toughness, and mechanical shock resistance.

In actual use, the bearing or the pump shaft are prone to wear, resulting in an increase in the axial clearance between the two, which affects the normal operation of the magnetic pump.

Contents of the invention

The object of the present invention is to provide a gap compensation structure for a magnetic pump bearing to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A gap compensation structure for a magnetic pump bearing, comprising a first rolling bearing and a second rolling bearing installed between a main shaft and a main shaft sleeve, and an adjusting sleeve for accommodating the first rolling bearing and the second rolling bearing is installed on the main shaft sleeve, the first Adjusting springs are installed between the outer circumference of the first rolling bearing and the second rolling bearing and the inner wall of the adjusting sleeve, steel balls are arranged between the adjusting spring and the first rolling bearing and the second rolling bearing, and the steel balls are placed in the through holes on the adjusting sleeve. Extruded by the adjustment spring, it bears against the outer circumferential surfaces of the first rolling bearing and the second rolling bearing.

As a further solution of the present invention: the outer rings of the first rolling bearing and the second rolling bearing are made of stainless steel, and the rollers of the first rolling bearing and the second rolling bearing are made of ceramics.

As a further solution of the present invention: an inner magnetic rotor is installed on the main shaft, the end of the main shaft is connected with the end of the rotor through an inner magnetic rotor fastener, and an outer magnetic rotor is arranged on the outer side of the spacer sleeve, and the outer magnetic rotor is connected to the outer magnetic rotor. The rotor is fixedly connected. The main shaft sleeve is supported by the pump cover installed in the pump body. The pump body is installed on the base. The end of the main shaft protrudes from the pump cover and is connected with the impeller. The water inlet corresponding to the impeller, the pump body is provided with a water outlet at a position corresponding to one side of the impeller, the rotor is connected with the input shaft of the motor, and the input shaft drives the rotation of the rotor.

As a further solution of the present invention: both ends of the main shaft are provided with threads for connecting with the inner magnetic rotor fastener and the impeller.

As a further solution of the present invention: the rotor is connected to the input shaft through a key, and an axial compensation spring is installed between the rotor and the input shaft.

Compared with the prior art, the beneficial effect of the present invention is: after the steel ball receives the force of the adjusting spring, it gives the first rolling bearing and the second rolling bearing an elastic preload in the axial direction, so that the first rolling bearing and the second rolling bearing Or after the main shaft is worn, the first rolling bearing and the second rolling bearing can still make good contact with the main shaft. At the same time, the axial compensation spring acts between the rotor and the input shaft, which can eliminate the axial clearance or axial movement of the rotor. Ensure the smooth operation of the magnetic pump.

Description of drawings

Fig. 1 is a structural schematic diagram of a gap compensation structure of a magnetic pump bearing.

FIG. 2 is an enlarged view of the structure at A in FIG. 1 .

In the figure: 1-pump body, 2-pump cover, 3-main shaft, 4-outer magnetic rotor, 5-bracket, 6-motor, 7-inner magnetic rotor, 8-first rolling bearing, 9-second rolling bearing, 10 -Impeller, 11-base, 12-inner magnetic rotor fastener, 13-water outlet, 14-water inlet, 15-input shaft, 16-rotor, 17-axial compensation spring, 18-adjusting spring, 19-steel ball , 20-through hole, 21-main shaft sleeve, 22-adjusting sleeve.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Please refer to FIGS. 1-2. In an embodiment of the present invention, a gap compensation structure of a magnetic pump bearing includes a first rolling bearing 8 and a second rolling bearing 9 installed between the main shaft 3 and the main shaft sleeve 21. The main shaft sleeve 21 An adjustment sleeve 22 for accommodating the first rolling bearing 8 and the second rolling bearing 9 is also installed on the top, and an adjustment spring 18 is installed between the outer circumference of the first rolling bearing 8 and the second rolling bearing 9 and the inner wall of the adjustment sleeve 22, and the adjustment spring 18 A steel ball 19 is provided between the first rolling bearing 8 and the second rolling bearing 9, and the steel ball 19 is placed in the through hole 20 on the adjusting sleeve 22, and the steel ball 19 is pressed by the adjusting spring 18 to withstand the first rolling bearing 8 and the second rolling bearing 9, after the steel ball 19 receives the force of the adjustment spring 18, it gives the first rolling bearing 8 and the second rolling bearing 9 an elastic preload in the axial direction, so that the first rolling bearing 8 and the second rolling bearing 9 or the main shaft 3 After wear and tear, the first rolling bearing 8 and the second rolling bearing 9 can still make good contact with the main shaft 3.

The outer rings of the first rolling bearing 8 and the second rolling bearing 9 are made of stainless steel, and the rollers of the first rolling bearing 8 and the second rolling bearing 9 are made of ceramics.

Example 2

Referring to Fig. 1, the inner magnetic rotor 7 is installed on the main shaft 3, the end of the main shaft 3 is connected with the end of the rotor 16 through the inner magnetic rotor fastener 12, and the outer magnetic rotor 4 is arranged on the outer side of the spacer sleeve. The magnetic rotor 4 is fixedly connected with the rotor 16, the main shaft sleeve 21 is supported by the pump cover 2 installed in the pump body 1, the pump body 1 is installed on the base 11, and the end of the main shaft 3 protrudes from the pump cover 2 and is connected with the impeller 10 The pump body 1 is provided with a water inlet 14 corresponding to the impeller 10 in the axial direction corresponding to the main shaft 3, and the pump body 1 is provided with a water outlet 13 at a position corresponding to the side of the impeller 10. When the main shaft 3 drives the impeller 10 to rotate, Water flows into the water outlet 13 from the water inlet 14 , the rotor 16 is connected to the input shaft 15 of the motor 6 , and the input shaft 15 drives the rotation of the rotor 16 .

Both ends of the main shaft 3 are provided with threads for connecting with the inner magnetic rotor fastening part 12 and the impeller 10 .

In order to reduce the axial movement of the rotor 16 during rotation, the rotor 16 is connected to the input shaft 15 through a key, and an axial compensation spring 17 is installed between the rotor 16 and the input shaft 15 to eliminate the axial clearance of the rotor 16 Or axial movement to ensure the smooth operation of the magnetic pump.

In conjunction with Embodiment 1-2, the working principle of the present invention is described: the steel ball 19 is pressed by the adjustment spring 18 to withstand the outer circumferential surfaces of the first rolling bearing 8 and the second rolling bearing 9, and when the motor 6 outputs power, the input shaft 15 drives The rotor 16 rotates, and the main shaft 3 drives the impeller to rotate through the magnetic force. During this process, the steel ball 19 receives the force of the adjusting spring 18 and gives the first rolling bearing 8 and the second rolling bearing 9 an elastic preload in the axial direction. , so that after the first rolling bearing 8 and the second rolling bearing 9 or the main shaft 3 are worn, the first rolling bearing 8 and the second rolling bearing 9 can still make good contact with the main shaft 3, and at the same time, the axial compensation spring 17 acts on the rotor 16 and the input Between the shafts 15, the axial gap or axial movement of the rotor 16 can be eliminated to ensure the smooth operation of the magnetic pump.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. a kind of backlash compensation structure of magnetic drive pump bearing, including the first rolling for being mounted between main shaft (3) and collar bush (21) Dynamic bearing (8) and the second rolling bearing (9), which is characterized in that be also equipped on the collar bush (21) for accommodating the first rolling The adjusting set (22) of dynamic bearing (8) and the second rolling bearing (9), the outer circle of the first rolling bearing (8) and the second rolling bearing (9) Be mounted on adjustment spring (18) between week and the inner wall of adjusting set (22), adjustment spring (18) and the first rolling bearing (8) and Steel ball (19) is equipped between second rolling bearing (9), steel ball (19) is placed in the through-hole (20) in adjusting set (22) Nei, steel ball (19) The outer circumference surface of the first rolling bearing (8) and the second rolling bearing (9) is withstood in the extruding of modulated spring (18).

2. a kind of backlash compensation structure of magnetic drive pump bearing according to claim 1, which is characterized in that described first rolls The outer ring material of bearing (8) and the second rolling bearing (9) is stainless steel, the first rolling bearing (8) and the second rolling bearing (9) Roller material is ceramics.

3. a kind of backlash compensation structure of magnetic drive pump bearing according to claim 1, which is characterized in that the main shaft (3) On interior magnet rotor (7) is installed, the end of main shaft (3) is connect by interior magnet rotor fastener (12) with the end of rotor (16), The outside of separation sleeve is equipped with outer magnet rotor (4), and outer magnet rotor (4) is fixedly connected with rotor (16), and collar bush (21) is by being mounted on Pump cover (2) support in the pump housing (1), the pump housing (1) are mounted on pedestal (11), the end of main shaft (3) stretched out from pump cover (2) and with Impeller (10) connects, and the pump housing (1) is equipped with water inlet (14) corresponding with impeller (10) on the axial direction of corresponding main shaft (3), The pump housing (1) is equipped with water outlet (13), the input shaft of the rotor (16) and motor (6) at a side position of corresponding impeller (10) (15) it connects, the rotation of rotor (16) is driven by input shaft (15).

4. a kind of backlash compensation structure of magnetic drive pump bearing according to claim 3, which is characterized in that the main shaft (3) Both ends be equipped with the screw thread for being connect with interior magnet rotor fastener (12) and impeller (10).

5. a kind of backlash compensation structure of magnetic drive pump bearing according to claim 3, which is characterized in that the rotor (16) With input shaft (15) by key connection, while nose balance spring (17) being installed between rotor (16) and input shaft (15).