Magnetic drive pump shaft sleeve compensation structure

Abstract

The utility model belongs to the field of magnetic pumps, and provides a magnetic pump shaft sleeve compensation structure which comprises a first limiting piece, a second limiting piece and a compensation expansion sleeve. Wherein the second limiting piece and the first limiting piece are arranged at an interval; the compensation expansion sleeve is arranged between the first limiting piece and the second limiting piece and forms a hollow tubular deformation part, the compensation expansion sleeve further forms annular sleeve parts connected to the end faces of the two sides of the deformation part in the axial direction of the deformation part, the deformation part abuts against the first limiting piece and the second limiting piece through the annular sleeve parts, and the annular sleeve parts form a hollow tube coaxial with the deformation part. The inner diameter and the outer diameter of the ring sleeve part are smaller than those of the deformation part, so that the inner wall face of the ring sleeve part and the inner wall face of the deformation part are matched to form a deformation space allowing the deformation part to expand or retract inwards towards the central axis of the deformation part, and the outer wall face of the ring sleeve part and the outer wall face of the deformation part are matched to form a compensation space matched with the deformation space.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of magnetic force pumps, and particularly relates to a magnetic force pump shaft sleeve compensation structure. BACKGROUND

[0002] The magnetic force pump is widely applied in the fields of chemical industry and medicine due to its characteristics of full sealing, no leakage, self-lubricating and cooling design, and no need of external auxiliary system to transport high-temperature medium (such as high-temperature heating and easily crystallized medium). However, the existing magnetic force pump sliding bearing assembly faces severe challenges under high-temperature heavy load working conditions. Firstly, the traditional design is adapted to the working condition temperature by presetting different gear gaps, but the actual running gap value is easy to exceed the design range due to the difference in thermal expansion coefficient between the metal shaft sleeve and the silicon carbide bearing and other components under high temperature, resulting in coaxiality deviation, eccentric wear and bearing fragmentation. Secondly, when pumping high-temperature medium, the superimposed action of thermal shock and mechanical vibration deteriorates the stress of the brittle silicon carbide bearing and aggravates the fragmentation risk, which seriously affects the stability of the magnetic force pump. Therefore, it is necessary to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide a magnetic force pump shaft sleeve compensation structure to solve the technical problem of poor stability of the magnetic force pump in the prior art.

[0004] To achieve the above purpose, the technical scheme adopted by the application is to provide a magnetic force pump shaft sleeve compensation structure, which comprises:

[0005] A first limiting piece;

[0006] A second limiting piece, which is arranged in space with the first limiting piece;

[0007] A compensation sleeve, which is arranged between the first limiting piece and the second limiting piece and forms a hollow tubular deformation part, the compensation sleeve also forms a ring sleeve part connected to the end faces on both sides of the deformation part in the axial direction, the deformation part abuts against the first limiting piece and the second limiting piece through the ring sleeve part, the ring sleeve part forms a hollow tubular structure coaxial with the deformation part, the inner diameter and the outer diameter of the ring sleeve part are both smaller than those of the deformation part, so that the inner wall surface of the ring sleeve part and the inner wall surface of the deformation part cooperate to form a deformation space for the deformation part to expand or shrink towards the central axis thereof, and the outer wall surface of the ring sleeve part and the outer wall surface of the deformation part cooperate to form a compensation space adapted to the deformation space.

[0008] Optionally, a compensation groove is formed in the deformation part.

[0009] The compensation groove extends in the direction parallel to the central axis of the deformation part.

[0010] Optionally, two ends of the compensation groove extend to the connection between the deformation part and the ring sleeve.

[0011] Optionally, a through compensation hole is formed on the deformation part.

[0012] The compensation hole is arranged at two ends of the compensation groove and communicates with the compensation groove.

[0013] Optionally, the compensation hole is a circular hole.

[0014] Optionally, a plurality of compensation grooves are arranged around the central axis of the deformation part.

[0015] Optionally, a smooth fillet transition part is formed between the ring sleeve part and the deformation part.

[0016] The magnetic pump shaft sleeve compensation structure provided in the application has the following beneficial effects: compared with the prior art, the first limiting piece and the second limiting piece arranged on both sides of the compensation sleeve can limit the axial movement of the compensation sleeve by abutting against the ring sleeve part on the compensation sleeve, so that the compensation sleeve can be stably installed between the target main shaft and the target shaft sleeve. Since the radial dimensions of the ring sleeve part and the deformation part are matched to form corresponding deformation spaces and compensation spaces between the ring sleeve part and the deformation part, during the process of the magnetic pump conveying high-temperature medium, the target shaft sleeve that is heated and expanded can be absorbed by the deformation space by pressing the deformation part into the deformation space, so that on the one hand, the target shaft sleeve and the corresponding target bearing can maintain a stable running gap, and on the other hand, the problem of target bearing fragmentation caused by inconsistent expansion deformation between the target main shaft, the target shaft sleeve and the target bearing can be avoided. Therefore, the magnetic pump shaft sleeve compensation structure provided in the application can significantly improve the running stability of the magnetic pump, which is much better than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The overall structure schematic diagram of the magnetic pump shaft sleeve compensation structure provided in the embodiments of the application is shown in the figure.

[0019] Figure 2 The overall structure schematic diagram of the compensation sleeve in the embodiments of the application is shown in the figure. Figure 1 ;

[0020] Figure 3 Overall structure of the compensation sleeve in the embodiment of the present application Figure 2 .

[0021] In the figure, reference numerals are as follows: 101, first limiting member; 102, second limiting member; 103, compensation sleeve; 131, deformation part; 132, ring part; 133, deformation space; 134, compensation space; 135, compensation groove; 136, compensation hole; 137, round corner transition part; 201, target spindle; 202, target shaft sleeve; 203, target bearing; 204, bearing seat; 205, set screw; 206, thrust ring. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] Please refer to Figures 1 to 3The application provides a magnetic force pump shaft sleeve compensation structure. The magnetic force pump shaft sleeve compensation structure comprises a first limiting piece 101, a second limiting piece 102 and a compensation sleeve 103. The second limiting piece 102 is arranged at intervals from the first limiting piece 101. The compensation sleeve 103 is arranged between the first limiting piece 101 and the second limiting piece 102 and forms a hollow tubular deformation part 131. The compensation sleeve 103 also forms a ring sleeve part 132 which is connected to the end faces of the deformation part 131 in the axial direction. The deformation part 131 abuts against the first limiting piece 101 and the second limiting piece 102 through the ring sleeve part 132. The ring sleeve part 132 forms a hollow tubular structure coaxial with the deformation part 131. The inner diameter and the outer diameter of the ring sleeve part 132 are smaller than those of the deformation part 131, so that the inner wall surface of the ring sleeve part 132 and the inner wall surface of the deformation part 131 cooperatively form a deformation space 133 for the deformation part 131 to expand or shrink towards the central axis. The outer wall surface of the ring sleeve part 132 and the outer wall surface of the deformation part 131 cooperatively form a compensation space 134 which is adapted to the deformation space 133. As a preferred embodiment, the ring sleeve part 132 is sleeved on a target spindle 201 in a transition fit. A target shaft sleeve 202 is arranged on the outer surface of the deformation part 131 in an interference fit. A target bearing 203 is rotatably connected to the outer circular surface of the target shaft sleeve 202 in a set gap. The axial ends of the target shaft sleeve 202 abut against the first limiting piece 101 and the second limiting piece 102 to limit the axial position of the target shaft sleeve 202. Figure 1 The target bearing 203 is fastened and connected in the shaft hole of the bearing seat 204 through a locking screw 205. When the target bearing 203 is axially arranged in two groups, the first limiting piece 101 is a fixed distance sleeve which is arranged between the two target shaft sleeves 202 and the compensation sleeve 103. The second limiting piece 102 is arranged at the outer ends of the two target shaft sleeves 202 and the compensation sleeve 103 and is fixedly installed on the target spindle 201, so that the axial position of the target shaft sleeve 202 and the compensation sleeve 103 is determined. The end face of the second limiting piece 102 towards the target bearing 203 can be provided with a ring groove for installing a thrust ring 206. The thrust ring 206 has a set gap with the end face of the target bearing 203. In this way, the axial position of the target spindle 201 relative to the bearing seat 204 is limited, so that the target spindle 201 provided with the compensation sleeve 103 can smoothly and stably operate.

[0027] In the magnetic force pump shaft sleeve compensation structure provided in the embodiment, the first limiting piece 101 and the second limiting piece 102 arranged on both sides of the compensation sleeve 103 can limit the axial movement of the compensation sleeve 103 by abutting against the ring sleeve part 132 on the compensation sleeve 103, so that the compensation sleeve 103 can be stably arranged between the target main shaft 201 and the target shaft sleeve 202. Since the radial dimension of the ring sleeve part 132 and the deformation part 131 is matched to form the corresponding deformation space 133 and the compensation space 134 between the ring sleeve part 132 and the deformation part 131, in the process of conveying high-temperature medium by the magnetic force pump, the target shaft sleeve 202 that is heated and expanded can be absorbed by the deformation space 133 by extruding the deformation part 131 into the deformation space 133, so that on the one hand, the target shaft sleeve 202 and the corresponding target bearing 203 can keep a stable running gap, and on the other hand, the problem of the target bearing 203 being broken due to inconsistent expansion deformation between the target main shaft, the target shaft sleeve and the target bearing can be avoided. At the same time, the deformation part 131 of the compensation sleeve 103 also has good vibration absorption and damping capacity, which can effectively absorb and reduce the thermal shock and mechanical vibration in the process of conveying high-temperature medium, so that the magnetic force pump shaft sleeve compensation structure provided in the embodiment can significantly improve the running stability of the magnetic force pump, which is much better than the prior art.

[0028] It should be noted that the first limiting piece 101 and the second limiting piece 102 in the embodiment can be a distance sleeve and a thrust ring seat structure for mounting the thrust ring 206 as described above, so that the structure of the magnetic force pump can be more simple by avoiding introducing redundant limiting structures in the magnetic force pump. In addition, the compensation sleeve 103 arranged between the target main shaft 201 and the target shaft sleeve 202 in the embodiment can form a transition and an interference fit with the target main shaft 201 and the target shaft sleeve 202 respectively, so that the installation stability of the compensation sleeve can be further improved.

[0029] In another embodiment of the present application, please refer to Figures 1 to 3 , a through compensation groove 135 is formed on the deformation part 131; the compensation groove 135 extends in a direction parallel to the central axis of the deformation part 131. According to the above structure provided in the embodiment, the compensation groove 135 arranged on the deformation part 131 can facilitate uniform deformation of the deformation part 131, which is conducive to further improving the running stability of the magnetic force pump.

[0030] In another embodiment of the present application, please refer to Figures 1 to 3 , the two ends of the compensation groove 135 respectively extend to the connection between the deformation part 131 and the ring sleeve. According to the above structure provided in the embodiment, the compensation groove 135 extending to the connection between the deformation part 131 and the ring sleeve can further facilitate uniform deformation of the deformation part 131, which is conducive to further improving the running stability of the magnetic force pump.

[0031] In another embodiment of the present application, referring to Figures 1 to 3 , the compensation hole 136 is formed through the deformation portion 131; the compensation hole 136 is arranged at both ends of the compensation groove 135 and communicates with the compensation groove 135. According to the above structure provided in the embodiment, the compensation hole 136 arranged at both ends of the compensation groove 135 can not only facilitate the uniform deformation of the deformation portion 131, but also can be used to eliminate the internal stress on the deformation portion 131, which is beneficial to further improve the running stability of the magnetic drive pump.

[0032] In another embodiment of the present application, referring to Figures 1 to 3 , the compensation hole 136 is a circular hole. According to the above structure provided in the embodiment, the circular compensation hole 136 can effectively improve the structural strength of the deformation portion 131, which is beneficial to further improve the running stability of the magnetic drive pump.

[0033] In another embodiment of the present application, referring to Figures 1 to 3 , a plurality of compensation grooves 135 are arranged around the central axis of the deformation portion 131. According to the above structure provided in the embodiment, the plurality of compensation grooves 135 arranged on the deformation portion 131 can further facilitate the uniform deformation of the deformation portion 131, which is beneficial to further improve the running stability of the magnetic drive pump.

[0034] In another embodiment of the present application, referring to Figures 1 to 3 , a smooth fillet transition portion 137 is formed between the ring sleeve portion 132 and the deformation portion 131. According to the above structure provided in the embodiment, the fillet transition portion 137 arranged between the ring sleeve portion 132 and the deformation portion 131 can further improve the structural strength of the deformation portion 131, which is beneficial to further improve the running stability of the magnetic drive pump.

[0035] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A magnetic pump shaft sleeve compensation structure, characterized by, Comprise: First limiting member (101); Second limiting member (102), with the first limiting member (101) interval setting; Compensation sleeve (103), set in the first limiting member (101) and the second limiting between and form hollow tubular deformation (131), the compensation sleeve (103) also forms along the deformation (131) axial connection on the deformation (131) both sides end surface ring sleeve (132), the deformation (131) through the ring sleeve (132) respectively with the first limiting member (101) and the second limiting member (102) abut, the ring sleeve (132) forms with the deformation (131) coaxial hollow tubular, the inner diameter and outer diameter of the ring sleeve (132) are all less than the deformation (131) so that the inner wall surface of the ring sleeve (132) and the inner wall surface of the deformation (131) cooperate to form the deformation space (133) for the deformation (131) to expand or shrink towards its own center axis, also make the outer wall surface of the ring sleeve (132) and the outer wall surface of the deformation (131) cooperate to form the compensation space (134) adapted to the deformation space (133).

2. The magnetic pump shaft sleeve compensation structure of claim 1, wherein: The deformation (131) forms a through compensation slot (135); The compensation slot (135) extends in a direction parallel to the center axis of the deformation (131).

3. The magnetic pump shaft sleeve compensation structure of claim 2, wherein: The compensation slot (135) extends to the connection between the deformation (131) and the ring sleeve at both ends.

4. The magnetic pump shaft sleeve compensation structure of claim 3, wherein: The deformation (131) forms a through compensation hole (136); The compensation hole (136) is arranged at both ends of the compensation slot (135) and communicates with the compensation slot (135).

5. The magnetic pump shaft sleeve compensation structure of claim 4, wherein: The compensation hole (136) is a circular hole.

6. The magnetic pump shaft sleeve compensation structure of any one of claims 2-5, wherein: The compensation slot (135) is arranged at intervals around the center axis of the deformation (131).

7. The magnetic pump shaft sleeve compensation structure of claim 1, wherein: A smooth fillet transition (137) is formed between the ring sleeve (132) and the deformation (131).

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