Coupling for pumps

Abstract

The application provides a coupling for a pump, comprising a driving flange, a driven flange, and a plurality of sets of stepped shoulder nesting structures arranged between the driving flange and the driven flange; the stepped shoulder nesting structure comprises a groove and a convex shaft; the groove adopts a structure with a gradually reduced inner diameter to form a shoulder surface; an outer bag is arranged in the groove, and the outer bag is filled with a solidifiable fluid; the convex shaft can be inserted into the groove, abut against the shoulder surface, and press the outer bag; a reserved cavity is formed on the outer end surface of the convex shaft, and a probe is slidably inserted into the reserved cavity; the probe can pierce the outer bag to make the fluid overflow and solidify, forming a filler filling the space between the outer end surface of the convex shaft and the groove bottom. The coupling for the pump provided by the application can change the curved contact between the outer edge of the convex shaft and the shoulder surface into the surface contact between the outer end surface of the convex shaft and the filler, thereby expanding the contact area, reducing the wear phenomenon of the shoulder surface, and improving the structural stability in the continuous use scenario of the pump body.

Description

Technical Field

[0001] This application belongs to the field of mechanical transmission technology, specifically relating to a coupling for pumps. Background Technology

[0002] Pump couplings are mechanical transmission structures used to connect the motor shaft (or other forms of power output shaft) and the pump shaft. Their function is to transmit torque and compensate for certain alignment errors.

[0003] In existing technology, the most common pump coupling is the flange coupling. This coupling rigidly connects the pump shaft and the motor shaft via bolts to the flange, ensuring synchronous rotation of the two shafts. During installation, the flange coupling typically uses a stepped stop nesting structure for positioning. Specifically, a protruding cylinder is machined on the flange end face on the driving side, and a recessed conical groove is machined at the corresponding position on the driven side flange. During mating, the cylinder embeds into the conical groove, achieving a fit between the two flange end faces and positioning of the motor shaft and pump shaft.

[0004] The inventors discovered that in the existing stepped stop nesting structure, the contact area between the cylinder and the conical groove is small, and there are two gaps, one inside and one outside. This causes the stop surface (i.e., the inner wall of the cylinder and the conical groove) to wear to a certain extent due to microscopic relative sliding after the pump body has been running for a long time. Under normal circumstances, this wear phenomenon can be compensated by the preload of the bolts. However, when the wear is more severe (greater than 0.02mm), it is necessary to stop the machine to repair the stop surface or replace the flange components, which affects the continuous use of the pump body. Utility Model Content

[0005] This application provides a pump coupling designed to improve the strength of the stepped stop nesting structure, thereby reducing wear on the stop surface and improving the structural stability of the pump body in continuous use scenarios.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A pump coupling is provided, comprising a drive flange for mounting on a motor shaft, a driven flange for mounting on a pump shaft, and multiple sets of stepped stop nesting structures disposed between the drive flange and the driven flange; wherein the multiple sets of stepped stop nesting structures are spaced apart around the central axis of the drive flange; the stepped stop nesting structures include:

[0008] A groove is formed on the outer surface of the driven flange; the inner diameter of the groove gradually decreases in the direction from the opening of the groove to the bottom of the groove to form a stop face; an outer bladder is disposed within the groove, and the outer bladder is filled with a solidifiable fluid; and

[0009] The convex shaft, with a cylindrical structure, is disposed on the outer side of the active flange. When the active flange and the driven flange are mated, the convex shaft is adapted to be inserted into the groove, and the outer edge of the convex shaft abuts against the stop surface, and the outer end face of the convex shaft presses against the outer bag.

[0010] The outer end face of the convex shaft is provided with a reserved cavity, and a probe is slidably inserted into the reserved cavity;

[0011] The probe is used to puncture the outer bladder to allow the fluid to overflow and solidify, forming a filler that fills the space between the outer end face of the convex shaft and the bottom of the groove.

[0012] In one possible implementation, the fluid is an anaerobic adhesive used to cure in an air-isolated environment;

[0013] An inner bag is provided inside the outer bag, and the inner bag is filled with oxygen absorbent; the inner bag is used for the probe to puncture, so that the oxygen absorbent reacts with the oxygen in the fluid to consume the oxygen in the space between the outer end face of the convex shaft and the bottom of the groove.

[0014] In one possible implementation, the bottom of the groove is provided with a recessed groove; when the outer bag is pressed against the outer end face of the convex shaft, the recessed groove is used for the outer bag to be embedded.

[0015] In one possible implementation, two adjacent sinkers along the circumference of the driven flange are connected by an annular hole.

[0016] In one possible implementation, a protective film is provided on the outer end face of the convex shaft; the protective film closes the opening of the reserved cavity and is used for the probe to puncture it.

[0017] In one possible implementation, the reserved cavity extends from the outer end face of the convex shaft to the inner side of the active flange;

[0018] The probe extends from the outer end of the convex shaft to the inner side of the active flange, and the extended end has a limiting disc extending radially outward.

[0019] In one possible implementation, the protruding portion of the probe located inside the active flange is fitted with an elastic snap.

[0020] The elastic buckles abut against the inner surfaces of the limiting plate and the active flange at their two ends facing the probe axially, respectively, to restrict the movement of the probe toward the outside of the convex shaft.

[0021] In one possible implementation, both the active flange and the driven flange have a slot on their inner walls. The slot extends along the axial direction of the corresponding active flange or driven flange and is used to embed a flat key on the motor shaft or the pump shaft.

[0022] The pump coupling also includes:

[0023] A first isolation gasket, disposed between the driving flange and the driven flange, has multiple through holes corresponding one-to-one with the multiple sets of stepped stop nesting structures, each through hole being adapted for the corresponding convex shaft to pass through; and

[0024] Two second isolation gaskets are respectively disposed on both sides of the first isolation gasket to be embedded in the active flange and the driven flange respectively; the outer peripheral surface of the second isolation gasket is provided with an alignment portion suitable for embedding in the strip groove to restrict the rotation of the second isolation gasket;

[0025] The combined structure of the first isolation pad and the two second isolation pads is used to separate the motor shaft and the pump shaft.

[0026] In one possible implementation, mounting grooves are provided on both sides of the first isolation pad, and the mounting grooves are used for embedding the second isolation pad.

[0027] In one possible implementation, the active flange has a positioning hole and the driven flange has an alignment hole; when the active flange and the driven flange are mated, the positioning hole and the alignment hole are coaxially connected.

[0028] The pump coupling also includes:

[0029] Mounting bolts, adapted to be inserted into the interconnected positioning holes and alignment holes, with their heads abutting the inner surface of the driving flange or the driven flange; and

[0030] A mounting nut is adapted to be threadedly connected to the mounting bolt to clamp the driving flange and the driven flange with the head of the mounting bolt.

[0031] The first isolation pad has a clearance hole suitable for the installation bolt to pass through.

[0032] In this embodiment, the motor shaft and pump shaft can be coaxially connected by docking the active flange and the driven flange; during the docking process of the motor shaft and pump shaft, multiple sets of stepped stop nesting structures cooperate to ensure the coaxial setting of the active flange and the driven flange.

[0033] The working principle of the stepped stop nesting structure includes: as the active flange and the driven flange are docked, the cam shaft will be inserted into the groove and abut against the stop surface of the groove; after docking, the outer bag is pressed by the abutment of the outer end of the cam shaft. At this time, the driving probe moves axially along the reserved cavity, which can puncture the outer bag. Then the outer bag recovers its deformation, and the fluid stored inside will flow out and solidify, forming a filler that fills the space between the outer end face of the cam shaft and the bottom of the groove, so that the spatial curve contact between the cam shaft and the stop surface is changed to the surface contact between the outer end face of the cam shaft and the filler.

[0034] The pump coupling provided in this embodiment, compared with the prior art, can increase the contact area between the convex shaft and the stop surface, reduce the wear phenomenon of the stop surface, and improve the structural stability of the pump body in continuous use scenarios. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is one of the three-dimensional structural schematic diagrams of the pump coupling provided in the embodiments of this application;

[0037] Figure 2 This is the second three-dimensional structural schematic diagram of the pump coupling provided in the embodiments of this application;

[0038] Figure 3 for Figure 2 A magnified view of a portion of the upper circle at point A;

[0039] Figure 4 for Figure 2 Side view;

[0040] Figure 5 For along Figure 4 Cross-sectional view of the middle BB line;

[0041] Figure 6 For along Figure 4 Cross-sectional view of the CC line;

[0042] Figure 7 This is a three-dimensional structural diagram of the first and second isolation gaskets used in the embodiments of this application from an explosion perspective.

[0043] Figure 8 This is a three-dimensional structural diagram of the active flange used in the embodiments of this application;

[0044] Figure 9 This is a partially enlarged schematic diagram of the active flange used in the embodiments of this application from a cross-sectional perspective;

[0045] Figure 10 This is a three-dimensional structural diagram of the probe and elastic buckle used in the embodiments of this application from an explosion perspective.

[0046] Figure 11 This is a three-dimensional structural diagram of the driven flange used in the embodiments of this application;

[0047] Figure 12 This is a partially enlarged schematic diagram of the driven flange and outer bladder used in the embodiments of this application from a cross-sectional perspective;

[0048] Figure 13 This is a cross-sectional view of the driven flange used in the embodiments of this application;

[0049] Figure 14 This is a partially enlarged schematic diagram of the driven flange used in the embodiments of this application from a cross-sectional perspective;

[0050] Figure 15 This is a cross-sectional view of the outer and inner pouches used in the embodiments of this application in a combined state;

[0051] Explanation of reference numerals in the attached drawings: 1. Active flange; 11. Locating hole; 2. Driven flange; 21. Alignment hole; 3. Groove; 31. Sunken groove; 32. Annular hole; 4. Protruding shaft; 41. Reserved cavity; 42. Probe; 421. Limiting plate; 422. Elastic snap; 43. Protective film; 5. Outer bladder; 51. Inner bladder; 6. Strip groove; 7. First isolation gasket; 71. Through hole; 72. Mounting groove; 73. Clearance hole; 8. Second isolation gasket; 81. Alignment part; 9. Mounting bolt; 91. Mounting nut; 10. Motor shaft; 20. Pump shaft; 30. Flat key. Detailed Implementation

[0052] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0053] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0054] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0056] Please refer to the following: Figures 1 to 15 The pump coupling provided in this application will now be described. The pump coupling proposed in this application includes a driving flange 1, a driven flange 2, and multiple sets of stepped stop nesting structures.

[0057] The active flange 1 is fitted onto the motor shaft 10, and the driven flange 2 is fitted onto the pump shaft 20. Specifically, both the motor shaft 10 and the pump shaft 20 have outwardly protruding flat keys 30 on their outer walls, which extend axially along the corresponding motor shaft 10 or pump shaft 20. Correspondingly, both the active flange 1 and the driven flange 2 have axially penetrating snap-fit ​​grooves on their inner walls. Based on this, when the active flange 1 is installed on the motor shaft 10 and the driven flange 2 is installed on the pump shaft 20, the flat key 30 is inserted into the snap-fit ​​groove, and then the combination of the active flange 1 and the motor shaft 10, as well as the combination of the driven flange 2 and the pump shaft 20, can be achieved by welding.

[0058] Multiple sets of stepped stop nesting structures are arranged between the active flange 1 and the driven flange 2, and are distributed at intervals along the circumference of the active flange 1 (which is also the circumference of the driven flange 2); in this embodiment, each set of stepped stop nesting structures includes a groove 3 and a convex shaft 4.

[0059] The groove 3 is formed on the outer side of the driven flange 2. It should be noted that the outer side mentioned here refers to the side of the driven flange 2 used to connect with the driving flange 1. In the direction of the opening of the groove 3 towards the bottom of the groove (i.e. from the outside to the inside), the inner diameter of the groove 3 gradually decreases to form a conical stop surface.

[0060] An outer bag 5 is disposed within the groove 3. The outer bag 5 is bonded to the bottom of the groove 3 via an adhesive structure, and the interior of the outer bag 5 is filled with a solidifiable fluid. Specifically, the fluid is in a flowable state inside the outer bag 5. After the fluid is discharged from the outer bag 5, it solidifies and fills the internal space of the groove 3. In this embodiment, the fluid is a material that solidifies in an oxygen-free environment, meaning that the outer bag 5 contains oxygen. As the fluid is discharged from the outer bag 5, the amount of oxygen gradually decreases, and the fluid gradually solidifies.

[0061] The convex shaft 4 has a cylindrical structure and is located on the outer side of the active flange 1; similarly, the outer side of the active flange 1 is the side used to connect with the driven flange 2. When the active flange 1 and the driven flange 2 are mated, the convex shaft 4 is suitable for insertion into the groove 3, and the outer edge of the convex shaft 4 abuts against the stop surface, and the outer end face of the convex shaft 4 presses against the outer bag 5. At this time, the outer bag 5 is in an elastic stretched state and is easily punctured.

[0062] In order to achieve the technical purpose of puncturing the outer bag 5, a reserved cavity 41 is provided on the outer end face of the convex shaft 4, and a probe 42 is slidably inserted into the reserved cavity 41. In actual use, the probe 42 is used to puncture the outer bag 5 so that the fluid overflows and solidifies, forming a filler that fills the space between the outer end face of the convex shaft 4 and the bottom of the groove 3.

[0063] In this embodiment, the motor shaft 10 and the pump shaft 20 can be coaxially connected by connecting the active flange 1 and the driven flange 2. During the connection process of the motor shaft 10 and the pump shaft 20, multiple sets of stepped stop nesting structures cooperate to ensure the coaxial setting of the active flange 1 and the driven flange 2.

[0064] The working principle of the stepped stop nesting structure includes: as the active flange 1 and the driven flange 2 are docked, the convex shaft 4 will be inserted into the groove 3 and abut against the stop surface of the groove 3; after docking, the outer bag 5 is pressed by the abutment of the outer end of the convex shaft 4. At this time, the driving probe 42 moves axially along the reserved cavity 41, which can make the probe 42 puncture the outer bag 5. Then the outer bag 5 recovers its deformation, and the fluid stored inside will flow out and solidify, forming a filler that fills the space between the outer end face of the convex shaft 4 and the bottom of the groove 3, so that the spatial curve contact between the convex shaft 4 and the stop surface is changed to the surface contact between the outer end face of the convex shaft 4 and the filler.

[0065] The pump coupling provided in this embodiment, compared with the prior art, can increase the contact area between the cam shaft 4 and the stop surface, reduce the wear phenomenon of the stop surface, and improve the structural stability of the pump body in continuous use scenarios.

[0066] In some embodiments, such as Figure 12 and Figure 15 As shown, the fluid is an anaerobic adhesive, which is used to cure in an air-isolated environment.

[0067] An inner bag 51 is provided inside the outer bag 5, and the inner bag 51 is filled with an oxygen absorbent, usually ascorbic acid powder.

[0068] In actual use, the inner bag 51 is also used for the probe 42 to puncture it, so that the oxygen absorbent reacts with the oxygen in the fluid (specifically, the oxygen in the space between the convex shaft 4 and the bottom of the groove 3) to consume the oxygen in the space between the outer end face of the convex shaft 4 and the bottom of the groove 3, making the environment conducive to the curing of the anaerobic adhesive.

[0069] In some embodiments, such as Figure 12 , Figure 14 and Figure 15 As shown, a recessed groove 31 is provided at the bottom of the groove 3; when the outer bag 5 is pressed on the outer end face of the convex shaft 4, the recessed groove 31 is used for the outer bag 5 to be embedded; by reasonably setting the depth of the recessed groove 31, the outer bag 5 can be prevented from being pressed and damaged under the action of the convex shaft 4.

[0070] In some embodiments, such as Figure 13 As shown, two adjacent sinkers 31 along the circumference of the driven flange 2 are connected by an annular hole 32 so that the overflowing fluid can flow between multiple sinkers 31; by reasonably setting the size of the annular hole 32, the uniform distribution of the solidified material can be achieved, avoiding the impact on the fit between the convex shaft 4 and the stop surface.

[0071] In some embodiments, such as Figure 8 and Figure 9 As shown, a protective film 43 is provided on the outer end face of the convex shaft 4; the protective film 43 seals the opening of the reserved cavity 41 and can be punctured by the probe 42.

[0072] In some embodiments, such as Figure 3 and Figure 9 As shown, the reserved cavity 41 extends from the outer end face of the convex shaft 4 to the inner side of the active flange 1.

[0073] One end of the probe 42, away from the outer end of the convex shaft 4, extends to the inner side of the active flange 1, and the extended end has a limiting plate 421 extending radially outward; in actual use, the limiting plate 421 can abut against the inner side of the active flange 1, thereby preventing excessive movement of the probe 42.

[0074] In some embodiments, such as Figure 3 and Figure 10 As shown, the protruding part of the probe 42 inside the active flange 1 is fitted with an elastic buckle 422.

[0075] The two ends of the elastic buckle 422 facing the probe 42 axially abut against the inner sides of the limiting plate 421 and the active flange 1, respectively, to restrict the movement of the probe 42 toward the outside of the convex shaft 4.

[0076] In some embodiments, such as Figure 1 , Figure 8 and Figure 11 As shown, both the active flange 1 and the driven flange 2 have a strip groove 6 (i.e. the aforementioned snap-fit ​​groove) on their inner walls. The strip groove 6 runs through the axial direction of the corresponding active flange 1 or driven flange 2 and is used to embed the flat key 30 on the motor shaft 10 or pump shaft 20.

[0077] In this embodiment, as Figures 5 to 7 As shown, the pump coupling also includes a first isolation gasket 7 and a second isolation gasket 8.

[0078] The first isolation gasket 7 is disposed between the active flange 1 and the driven flange 2, and has multiple through holes 71 that correspond one-to-one with multiple sets of stepped stop nesting structures. Each through hole 71 is suitable for the corresponding convex shaft 4 to pass through.

[0079] Two second isolation gaskets 8 are respectively disposed on both sides of the first isolation gasket 7, so as to be embedded in the active flange 1 and the driven flange 2 respectively.

[0080] The outer peripheral surface of the second isolation gasket 8 is provided with an alignment part 81 suitable for embedding in the strip groove 6; when the second isolation gasket 8 and the active flange 1 or the driven flange 2 are engaged, the alignment part 81 is embedded in the corresponding strip groove 6 to restrict the rotation of the second isolation gasket 8.

[0081] In practical use, the combined structure of the first isolation gasket 7 and the two second isolation gaskets 8 is used to separate the motor shaft 10 and the pump shaft 20, thereby preventing the motor shaft 10 and the pump shaft 20 from contacting each other, and causing structural fatigue to concentrate on the replaceable first isolation gasket 7 and the second isolation gasket 8.

[0082] In some embodiments, such as Figures 5 to 7 As shown, the first isolation pad 7 has mounting grooves 72 on both sides. The mounting grooves 72 are used for the second isolation pad 8 to be inserted, so as to realize the combination of the first isolation pad 7 and the second isolation pad 8, which facilitates the replacement and combination of worn components.

[0083] In some embodiments, such as Figure 3 and Figure 6 As shown, the active flange 1 has a positioning hole 11, and the driven flange 2 has an alignment hole 21.

[0084] When the active flange 1 and the driven flange 2 are mated, the positioning hole 11 and the alignment hole 21 are coaxially connected.

[0085] The pump coupling also includes mounting bolts 9 and mounting nuts 91.

[0086] Mounting bolt 9 is adapted to be inserted into the interconnected positioning hole 11 and alignment hole 21, with its head abutting against the inner side of the driving flange 1 or the driven flange 2.

[0087] Mounting nut 91 is adapted to be threadedly connected to mounting bolt 9 so as to clamp the driving flange 1 and driven flange 2 with the head of mounting bolt 9.

[0088] Based on the foregoing, in order to avoid the first isolation gasket 7 from interfering with the structure, the first isolation gasket 7 is also provided with a clearance hole 73 suitable for the installation bolt 9 to pass through.

[0089] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pump coupling, comprising a drive flange for mounting on a motor shaft, a driven flange for mounting on a pump shaft, and multiple sets of stepped stop nesting structures disposed between the drive flange and the driven flange; wherein, Multiple sets of the aforementioned stepped stop nesting structures are spaced apart around the central axis of the active flange; characterized in that the stepped stop nesting structure includes: A groove is formed on the outer surface of the driven flange; the inner diameter of the groove gradually decreases in the direction from the opening of the groove to the bottom of the groove to form a stop face; an outer bladder is disposed within the groove, and the outer bladder is filled with a solidifiable fluid; and The convex shaft, with a cylindrical structure, is disposed on the outer side of the active flange. When the active flange and the driven flange are mated, the convex shaft is adapted to be inserted into the groove, and the outer edge of the convex shaft abuts against the stop surface, and the outer end face of the convex shaft presses against the outer bag. The outer end face of the convex shaft is provided with a reserved cavity, and a probe is slidably inserted into the reserved cavity; The probe is used to puncture the outer bladder to allow the fluid to overflow and solidify, forming a filler that fills the space between the outer end face of the convex shaft and the bottom of the groove.

2. The pump coupling as described in claim 1, characterized in that, The fluid is an anaerobic adhesive, which is used to cure in an air-isolated environment; An inner bag is provided inside the outer bag, and the inner bag is filled with oxygen absorbent; the inner bag is used for the probe to puncture, so that the oxygen absorbent reacts with the oxygen in the fluid to consume the oxygen in the space between the outer end face of the convex shaft and the bottom of the groove.

3. The pump coupling as described in claim 1, characterized in that, The bottom of the groove is provided with a recessed groove; when the outer bag is pressed on the outer end face of the convex shaft, the recessed groove is used for the outer bag to be inserted.

4. The pump coupling as described in claim 3, characterized in that, The two adjacent sinkers along the circumference of the driven flange are connected by an annular hole.

5. The pump coupling as described in claim 1, characterized in that, A protective film is provided on the outer end face of the convex shaft; the protective film closes the opening of the reserved cavity and is used for the probe to puncture it.

6. The pump coupling as described in claim 1, characterized in that, The reserved cavity extends from the outer end face of the convex shaft to the inner side of the active flange; The probe extends from the outer end of the convex shaft to the inner side of the active flange, and the extended end has a limiting disc extending radially outward.

7. The pump coupling as described in claim 6, characterized in that, The probe protruding from the inside of the active flange is fitted with an elastic buckle. The elastic buckles abut against the inner surfaces of the limiting plate and the active flange at their two ends facing the probe axially, respectively, to restrict the movement of the probe toward the outside of the convex shaft.

8. The pump coupling as described in any one of claims 1-7, characterized in that, Both the active flange and the driven flange have a strip groove on their inner walls. The strip groove runs through the axial direction of the corresponding active flange or driven flange and is used to embed the flat key on the motor shaft or the pump shaft. The pump coupling also includes: A first isolation gasket, disposed between the driving flange and the driven flange, has multiple through holes corresponding one-to-one with the multiple sets of stepped stop nesting structures, each through hole being adapted for the corresponding convex shaft to pass through; and Two second isolation gaskets are respectively disposed on both sides of the first isolation gasket to be embedded in the active flange and the driven flange respectively; the outer peripheral surface of the second isolation gasket is provided with an alignment portion suitable for embedding in the strip groove to restrict the rotation of the second isolation gasket; The combined structure of the first isolation pad and the two second isolation pads is used to separate the motor shaft and the pump shaft.

9. The pump coupling as described in claim 8, characterized in that, The first isolation pad has mounting grooves on both sides, which are used for embedding the second isolation pad.

10. The pump coupling as described in claim 8, characterized in that, The active flange has a positioning hole, and the driven flange has an alignment hole; when the active flange and the driven flange are mated, the positioning hole and the alignment hole are coaxially connected. The pump coupling also includes: Mounting bolts, adapted to be inserted into the interconnected positioning holes and alignment holes, with their heads abutting the inner surface of the driving flange or the driven flange; and A mounting nut is adapted to be threadedly connected to the mounting bolt to clamp the driving flange and the driven flange together with the head of the mounting bolt. The first isolation pad has a clearance hole suitable for the installation bolt to pass through.

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