Improved magnetic drive pump

Abstract

The utility model discloses an improved magnetic drive pump which comprises a base, a motor and a pump body, the motor and the pump body are arranged on the base, the pump body comprises a pump shaft and an isolation sleeve arranged between an outer magnetic mechanism and an inner magnetic mechanism, a shaft sleeve is arranged on the pump shaft in a surrounding mode, two sets of sliding bearings are arranged on the shaft sleeve, and a thrust mechanism is arranged in the pump body. The thrust mechanism comprises thrust assemblies and an axial balance assembly, the thrust assemblies are arranged on the two opposite sides of the sliding bearing, the axial balance assembly is arranged on the isolation sleeve and is coaxial with the pump shaft, and the end of the pump shaft is rotatably coupled in the axial balance assembly. And an elastic balance component for buffering the axial movement of the pump shaft is arranged on the axial balance assembly. According to the improved magnetic drive pump, the thrust assembly and the axial balancing assembly are matched with each other to balance the axial thrust of the pump shaft, so that the pump shaft can run stably, and damage caused by long-time hard friction of the sliding bearing is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic force pump technical field, in particular to the improved magnetic force pump. BACKGROUND

[0002] Pump is the mechanical of conveying fluid or making fluid pressure increase. It transmits the mechanical energy of prime mover or other external energy to liquid, and makes liquid energy increase. Pump is mainly used to convey liquid such as water, oil, acid and alkali liquid, emulsion, suspension emulsion and liquid metal, and also can convey liquid, gas mixture and liquid containing suspended solid. Pump can be divided into three types of positive displacement pump, dynamic pump and other type pump according to working principle. It can be divided into electric pump and magnetic force pump according to driving method.

[0003] Magnetic force pump is also called magnetic force driving pump, and is mainly composed of pump head, magnetic force driver (magnetic cylinder), motor, base and several parts. The magnetic force driver of magnetic force pump is composed of outer magnetic rotor, inner magnetic rotor and non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate through the shaft coupling, the magnetic field can penetrate the air gap and the non-magnetic isolation sleeve, and drive the inner magnetic rotor connected with the impeller to rotate synchronously, so as to realize the non-contact synchronous transmission of power. The dynamic sealing structure prone to leakage is converted into the static sealing structure with zero leakage. Since the pump shaft and the inner magnetic rotor are completely sealed by the pump body and the isolation sleeve, the problems of running, leaking, dripping and leaking are solved.

[0004] The pump shaft of magnetic force pump is installed on the pump cover through sliding bearing, and the thrust structure is matched on the outer side end face of sliding bearing. The sliding bearing and the shaft sleeve form a friction pair, which plays a radial supporting role for the rotor system. The sliding bearing and the thrust structure form a friction pair, which plays an axial limiting role for the rotor system. During the rotation of the impeller, the impeller will generate an axial thrust on the pump shaft. The axial thrust causes the frequent movement of the sliding bearing, so that the hard friction between the sliding bearing and the thrust structure is generated. Long-time use causes damage. TECHNICAL CONTENT

[0005] The utility model aims at providing an improved magnetic force pump to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An improved magnetic force pump comprises a base, a motor and a pump body arranged on the base, the pump body comprising a pump shaft, a spacer sleeve arranged between an outer magnetic mechanism and an inner magnetic mechanism, the pump shaft being arranged with a shaft sleeve, two sets of sliding bearings being arranged on the shaft sleeve, a thrust mechanism being arranged inside the pump body, the thrust mechanism comprising a thrust assembly and an axial balance assembly, the thrust assembly being arranged on opposite sides of the sliding bearings, the axial balance assembly being arranged on the spacer sleeve and coaxially arranged with the pump shaft, the end of the pump shaft being rotatably coupled in the axial balance assembly, the axial balance assembly being arranged with elastic balance members for buffering the axial movement of the pump shaft.

[0008] The improved magnetic force pump as claimed in the above, the axial balance assembly comprising a steel sleeve arranged on the spacer sleeve, the steel sleeve being arranged with a balance seat inside, the balance seat being arranged with a central hole and an annular open slot.

[0009] The improved magnetic force pump as claimed in the above, the axial balance assembly comprising a balance ring, the end of the pump shaft being fixedly arranged with a mounting ring, the balance ring being coaxially fixedly arranged with the mounting ring through a fixing rod.

[0010] The improved magnetic force pump as claimed in the above, the end of the pump shaft being movably connected in the central hole, the balance ring being movably connected in the annular open slot.

[0011] The improved magnetic force pump as claimed in the above, the axial balance assembly further comprising a plurality of the elastic balance members, the plurality of the elastic balance members being sequentially and spacedly arranged along the circumference of the annular open slot.

[0012] The improved magnetic force pump as claimed in the above, each of the elastic balance members comprising an arc-shaped steel plate, the arc-shaped steel plate being arranged along the radial direction of the annular open slot, the opposite sides of the arc-shaped steel plate being arranged with sliding blocks, the annular open slot being arranged with a strip-shaped movement slot along the radial direction, the sliding blocks being slidably connected in the strip-shaped movement slot, the strip-shaped movement slot being arranged with a blocking spring for blocking the movement of the sliding blocks.

[0013] The improved magnetic force pump as claimed in the above, the thrust assembly comprising a thrust block and a thrust seat, the thrust seat being arranged with a movable open cavity inside, a part of the thrust block being located in the movable open cavity.

[0014] The improved magnetic force pump as claimed in the above, the movable open cavity being arranged with an elastic buffer member, the elastic buffer member being arranged on the movement stroke of the thrust block moving into the movable open cavity.

[0015] The improved magnetic force pump as claimed in the above, the thrust seat being arranged with a thrust ring, the thrust ring being in contact with the sliding bearings when the thrust block moves to a preset position in the movable open cavity.

[0016] In the above technical solutions, the improved magnetic force pump provided by the utility model, the pump shaft is provided with a shaft sleeve, two groups of sliding bearings are arranged on the shaft sleeve, a thrust mechanism is arranged in the pump body, the thrust mechanism comprises a thrust assembly and an axial balance assembly, the thrust assembly is arranged on the opposite sides of the sliding bearing, the axial balance assembly is arranged on the isolation sleeve and coaxially arranged with the pump shaft, the end of the pump shaft is rotatably coupled in the axial balance assembly, the elastic balance member for buffering the axial movement of the pump shaft is arranged on the axial balance assembly, the thrust assembly and the axial balance assembly cooperate with each other to balance the axial thrust of the pump shaft, so that the pump shaft can run stably and the damage caused by long-time hard friction of the sliding bearing is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 The utility model provides the perspective diagram of the improved magnetic force pump for the embodiment of the utility model;

[0019] Figure 2 The utility model provides the internal structure schematic view of the improved magnetic force pump for the embodiment of the utility model;

[0020] Figure 3 The utility model provides the structure schematic view of the axial balance assembly for the embodiment of the utility model;

[0021] Figure 4 The utility model provides the structure schematic view of the elastic balance member for the embodiment of the utility model;

[0022] Figure 5 The utility model provides the structure schematic view of the thrust assembly for the embodiment of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, base plate, 11, motor, 12, impeller, 2, pump body, 21, isolation sleeve, 22, pump shaft, 23, shaft sleeve, 24, sliding bearing, 3, thrust mechanism, 31, thrust block, 32, thrust seat, 33, movable open cavity, 34, elastic buffer, 35, thrust ring, 4, axial balance assembly, 41, steel sleeve, 42, balance seat, 421, center hole, 422, annular open slot, 43, balance ring, 44, mounting ring, 45, fixed rod, 46, elastic balance member, 461, arc steel plate, 462, sliding block, 463, strip-shaped movement slot, 464, blocking spring. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0026] As shown in Figures 1-5 The utility model provides an improved magnetic force pump, including base 1 and setting motor 11 and pump body 2 on base 1, pump body 2 includes pump shaft 22 and the isolating bushing 21 between outer magnetic mechanism and inner magnetic mechanism, the shaft sleeve 23 is set around pump shaft 22, two groups of sliding bearings 24 are set on the shaft sleeve 23, the thrust mechanism 3 is set in pump body 2, and the thrust mechanism 3 includes thrust assembly and axial balance assembly 4, the opposite sides of sliding bearing 24 are provided with thrust assembly, axial balance assembly 4 is set on isolating bushing 21 and is coaxial with pump shaft 22, and the end of pump shaft 22 is rotatably coupled in axial balance assembly 4, and elastic flat structure member that the axial movement of pump shaft 22 is buffered is set on axial balance assembly 4.

[0027] Specifically, motor 11 and pump body 2 are all set on base 1, and pump body 2 includes outer magnetic mechanism, inner magnetic mechanism, isolating bushing 21, impeller 12, pump shaft 22 and the like structure, which is prior art and is not described in detail. The shaft sleeve 23 is set around the outer side of the pump shaft 22, and two groups of sliding bearings 24 are set on the shaft sleeve 23. The thrust mechanism 3 and the axial balance assembly 4 are arranged in the interior of the pump body 2. The thrust mechanism 3 is arranged correspondingly with the sliding bearing 24, thereby limiting the movement of the sliding bearing 24. For example, when the pump shaft 22 and the sliding bearing 24 move leftward along the axial direction, the thrust mechanism 3 located on the left side blocks and limits the sliding bearing 24. When the pump shaft 22 and the sliding bearing 24 move rightward along the axial direction, the thrust mechanism 3 located on the right side blocks and limits the sliding bearing 24.

[0028] In the embodiment, the axial balance assembly 4 is arranged in the isolating bushing 21 and correspondingly arranged with the end of the pump shaft 22. The installation structure for installing the pump shaft 22 is arranged in the interior of the axial balance assembly 4. The end of the pump shaft 22 is movably connected in the installation structure. The end of the pump shaft 22 can rotate in the interior of the installation structure and can move in the installation structure along the axial direction of the pump shaft 22. The elastic balance member 46 is arranged in the interior of the axial balance assembly 4. The elastic balance member 46 is arranged along the axial direction of the pump shaft 22 or parallel to the axial direction of the pump shaft 22. In this way, during use, when the pump shaft 22 moves towards the axial balance assembly 4, the elastic balance member 46 provides an axial balance force for the pump shaft 22. The balance force is used to balance the axial thrust of the pump shaft 22. In this way, the pump shaft 22 and the impeller 12 can stably operate.

[0029] The improved magnetic force pump is characterized in that the pump shaft 22 is provided with the shaft sleeve 23, the shaft sleeve 23 is provided with two groups of sliding bearings 24, the pump body 2 is internally provided with the thrust mechanism 3, the thrust mechanism 3 comprises a thrust assembly and an axial balance assembly 4, the opposite sides of the sliding bearing 24 are provided with the thrust assembly, the axial balance assembly 4 is arranged on the isolation sleeve 21 and coaxially arranged with the pump shaft 22, the end of the pump shaft 22 is rotatably coupled in the axial balance assembly 4, the axial balance assembly 4 is provided with the elastic balance member for buffering the axial movement of the pump shaft 22, the thrust assembly and the axial balance assembly 4 are matched to balance the axial thrust of the pump shaft 22, so that the pump shaft 22 can stably run, and the damage caused by long-time hard friction of the sliding bearing 24 is reduced.

[0030] In the embodiment, preferably, the axial balance assembly 4 comprises the steel sleeve 41 arranged on the isolation sleeve 21, the steel sleeve 41 is internally provided with the balance seat 42, the balance seat 42 is integrally arranged with the steel sleeve 41, the balance seat 42 is internally provided with the center hole 421 and the annular open slot 422, the center hole 421 is coaxially arranged with the pump shaft 22, the axial balance assembly 4 comprises the balance ring 43, the end of the pump shaft 22 is fixedly provided with the mounting ring 44, the balance ring 43 is coaxially fixedly arranged with the mounting ring 44 through the fixing rod 45, the fixing rod 45 is multiple, the multiple fixing rods 45 are sequentially and spacedly arranged along the circumference of the mounting ring 44, one end of the fixing rod 45 is fixedly mounted on the mounting ring 44, the other end of the fixing rod 45 is fixedly mounted on the balance ring 43, the end of the pump shaft 22 is movably connected in the center hole 421, the end of the pump shaft 22 can rotate in the center hole 421 and can move along the axial direction of the center hole 421, the balance ring 43 is movably connected in the annular open slot 422, the balance ring 43 can rotate in the annular open slot 422 and can reciprocate in the annular open slot 422.

[0031] In the embodiment, preferably, the axial balance assembly 4 further comprises a plurality of elastic balance members 46, which are sequentially and spacedly arranged along the circumference of the annular open slot 422, each of the elastic balance members 46 comprises an arc-shaped steel plate 461 arranged along the radial direction of the annular open slot 422, the opposite sides of the arc-shaped steel plate 461 are provided with sliding blocks 462, the annular open slot 422 is provided with a strip-shaped movement slot 463 along the radial direction, one strip-shaped movement slot 463 is arranged on each of the opposite sides of the arc-shaped steel plate 461, the sliding blocks 462 are slidably connected in the strip-shaped movement slots 463, and the strip-shaped movement slots 463 are provided with blocking springs 464 for blocking the movement of the sliding blocks 462; the sliding blocks 462 can press the blocking springs 464 when sliding along the strip-shaped movement slots 463, so that when the pump shaft 22 moves to one side of the balance seat 42, the end of the pump shaft 22 moves into the central hole 421, the balance ring 43 moves to the inside of the annular open slot 422 to press the arc-shaped steel plate 461, the arc-shaped steel plate 461 deforms to drive the sliding blocks 462 to slide along the strip-shaped movement slots 463 to press the blocking springs 464, so that the arc-shaped steel plate 461 and the blocking spring 464 both have elastic buffering effect, improving the elastic buffering effect of the balance ring 43 and the pump shaft 22, and the arc-shaped steel plate 461 and the blocking spring 464 can shorten the movement stroke of the pump shaft 22, avoiding the movement of the pump shaft 22 inside the pump body 2, and improving the stability of the pump body 2.

[0032] In the embodiment, preferably, the thrust assembly comprises a thrust block 31 and a thrust seat 32, the inside of the thrust seat 32 is provided with a movable open cavity 33, a part of the thrust block 31 is located in the movable open cavity 33, the thrust block 31, the thrust seat 32 and the movable open cavity 33 can be annular or arc-shaped, the movable open cavity 33 is provided with elastic buffers 34, the elastic buffers 34 block the movement stroke of the thrust block 31 moving into the movable open cavity 33, the elastic buffers 34 are a plurality of, which are sequentially and spacedly arranged along the circumference of the movable open cavity 33, and the elastic buffers 34 can be spring members, elastic telescopic columns, elastic steel plates, etc. The thrust seat 32 is provided with a thrust ring 35, when the thrust block 31 moves a certain stroke into the movable open cavity 33, the thrust ring 35 contacts the sliding bearing 24, so that the thrust ring 35 and the sliding bearing 24 are directly contacted, thereby blocking the movement of the sliding bearing 24.

[0033] Thus, in use, when the pump shaft 22 moves to the side of the balance seat 42: the end of the pump shaft 22 moves into the central hole 421, the balance ring 43 moves to the inside of the annular opening groove 422, thereby pressing the arc-shaped steel plate 461, the arc-shaped steel plate 461 and the blocking spring 464 cooperate with each other to elastically buffer the pump shaft 22, in this process, the sliding bearing 24 moves to the thrust seat 32 close to the balance seat 42, the sliding bearing 24 presses the thrust block 31, thereby making the thrust block 31 move into the movable opening cavity 33, the thrust block 31 presses the elastic buffer 34, the elastic buffer 34 elastically buffers the thrust block 31 and the sliding bearing 24, so that the arc-shaped steel plate 461, the blocking spring 464 and the elastic buffer 34 elastically buffer the pump shaft 22 and the sliding bearing 24, improve the elastic buffering effect of the balance ring 43 and the pump shaft 22, and the arc-shaped steel plate 461, the blocking spring 464 and the elastic buffer 34 cooperate with each other to shorten the movement stroke of the pump shaft 22, avoid the pump shaft 22 from moving inside the pump body 2, and improve the stability of the pump body 2. When the pump shaft 22 moves away from the balance seat 42, the sliding bearing 24 moves to the thrust seat 32 close to the impeller 12, the sliding bearing 24 presses the thrust block 31, thereby making the thrust block 31 move into the movable opening cavity 33, the thrust block 31 presses the elastic buffer 34, the elastic buffer 34 elastically buffers the thrust block 31 and the sliding bearing 24, and realizes the buffering and limiting of the movement of the pump shaft 22.

[0034] The above only describes some exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. An improved magnetic drive pump comprising a base and a motor and a pump body disposed on the base, the pump body comprising a pump shaft and a spacer sleeve disposed between an outer magnetic mechanism and an inner magnetic mechanism, characterized in that, The pump shaft is provided with a shaft sleeve, two groups of sliding bearings are arranged on the shaft sleeve, a thrust mechanism is arranged in the pump body, the thrust mechanism comprises a thrust assembly and an axial balance assembly, the thrust assembly is arranged on opposite sides of the sliding bearings, the axial balance assembly is arranged on the isolation sleeve and coaxially arranged with the pump shaft, the end of the pump shaft is rotatably coupled in the axial balance assembly, and the axial balance assembly is provided with an elastic balance member for buffering the axial movement of the pump shaft.

2. The improved magnetic drive pump of claim 1, wherein, The axial balance assembly comprises a steel sleeve arranged on the isolation sleeve, a balance seat is arranged in the steel sleeve, a center hole and an annular open slot are arranged in the balance seat.

3. The improved magnetic drive pump of claim 2 wherein, The axial balance assembly comprises a balance ring, the end of the pump shaft is fixedly provided with a mounting ring, and the balance ring is coaxially fixedly arranged with the mounting ring through a fixing rod.

4. The improved magnetic drive pump of claim 3 wherein, The end of the pump shaft is movably connected in the center hole, and the balance ring is movably connected in the annular open slot.

5. The improved magnetic drive pump of claim 4 wherein, The axial balance assembly further comprises a plurality of elastic balance members, and the plurality of elastic balance members are sequentially and spaced apart along the circumference of the annular open slot.

6. The improved magnetic drive pump of claim 5 wherein, Each elastic balance member comprises an arc-shaped steel plate, the arc-shaped steel plate is arranged in the radial direction of the annular open slot, sliding blocks are arranged on opposite sides of the arc-shaped steel plate, a strip-shaped movement slot is arranged in the radial direction of the annular open slot, the sliding blocks are slidably connected in the strip-shaped movement slot, and a blocking spring is arranged in the strip-shaped movement slot to block the movement of the sliding blocks.

7. The improved magnetic pump of claim 1, wherein, The thrust assembly comprises a thrust block and a thrust seat, the thrust seat is internally provided with a movable open cavity, and a part of the thrust block is located in the movable open cavity.

8. The improved magnetic drive pump of claim 7 wherein, The movable open cavity is provided with an elastic buffer, and the elastic buffer blocks the movement stroke of the thrust block moving into the movable open cavity.

9. The improved magnetic drive pump of claim 8 wherein, The thrust seat is provided with a thrust ring, and when the thrust block moves to a preset position in the movable open cavity, the thrust ring is in contact with the sliding bearing.

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