Long-spacing diaphragm coupling with adjustable length

Abstract

The utility model relates to a length-adjustable long-spacing diaphragm coupling, which is characterized by comprising a first access end unit, a locking unit, a self-adaptive telescopic unit, a lengthening unit and a second access end unit, a self-adaptive telescopic unit and a second connecting-in end unit are arranged at the two ends of the lengthened shaft respectively, meanwhile, the first connecting-in end unit is connected with the free end of the self-adaptive telescopic unit through a locking unit, and the self-adaptive telescopic unit comprises an outer gear sleeve and an inner gear sleeve; a part of the outer gear sleeve passes through one end of the inner gear sleeve, is inserted into the inner hole and is in sealed connection with the inner hole, meanwhile, the outer teeth on the outer gear sleeve are meshed with the inner teeth in the inner hole of the inner gear sleeve, the end of the outer gear sleeve is connected with the locking unit, and the inner gear sleeve is further connected with the lengthened shaft. According to the utility model, the axial length is adjustable, the axial movement of some equipment shafts is absorbed in the operation process, and the excessive deformation of the diaphragm caused by the fact that the axial displacement exceeds the allowable value of the diaphragm is prevented.

Description

Technical Field

[0001] The utility model relates to a coupling, in particular to a long-spacing diaphragm coupling with adjustable length. Background Art

[0002] At present, the diaphragm coupling is a multi-purpose coupling that can adapt to high speed and high torque. It has been widely recognized by users in the field of industrial centrifugal pumps and compressor equipment. Its stable and durable design has been verified by the industry and is often specified for use in the industry. For example, it is used in API petrochemical process pumps, industrial fans, compressors, boiler feed pumps, etc.

[0003] Furthermore, diaphragm couplings can compensate for relative displacement of the equipment's shaft heads due to factors such as foot movement, shaft thermal expansion, and motor shaft float. These displacements are ultimately compensated by the deformation of the diaphragm, which generates a certain axial force that is ultimately applied to the bearings of each rotor shaft, creating a force balance. However, the deformation capacity of each coupling model is fixed, so users must control the distance between the two shaft ends as accurately as possible during installation to minimize the loss of the coupling's actual axial compensation capacity due to installation errors.

[0004] Of course, there are still some disadvantages in specific application scenarios. For example, if other long-spacing couplings used by users on site are damaged and need to be replaced urgently with a new one, when there is no original coupling information or it is impossible to accurately measure such a long shaft end spacing, it is necessary to design a long-spacing coupling that can be adjusted in length within a certain range for accurate replacement.

[0005] For example, long rotor equipment experiences significant thermal expansion during operation due to rising temperatures, causing the shaft end distance to be much smaller than the theoretical design value. Using a conventional diaphragm coupling would cause this excessive axial displacement to act entirely on the diaphragm. When the displacement exceeds the diaphragm's allowable value, the diaphragm can be damaged and its lifespan cannot be achieved. In this case, a diaphragm coupling with self-adjusting length can effectively prevent excessive diaphragm deformation. Similarly, certain motors or steam turbines with sliding bearings may experience significant shaft movement during startup and shutdown, making this self-adjusting feature highly desirable. Summary of the Invention

[0006] The purpose of the utility model is to provide a long-spacing diaphragm coupling with adjustable length, which is not only adjustable in axial length during installation but also adaptively adjustable during operation, so as to absorb axial movement of the shaft of certain equipment and prevent excessive deformation of the diaphragm caused by the axial displacement of the coupling exceeding the allowable value of the diaphragm itself.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a long-spacing diaphragm coupling with adjustable length, the innovation of which is that it includes a first access end unit, a locking unit, an adaptive telescopic unit, an extension unit and a second access end unit arranged coaxially.

[0008] The extension unit includes an extension shaft, and both ends of the extension shaft are provided with an adaptive telescopic unit and a second access end unit detachably connected thereto. At the same time, the first access end unit is detachably connected to the free end of the adaptive telescopic unit through a locking unit.

[0009] The adaptive telescopic unit includes an outer gear sleeve and an inner gear sleeve. A partial section of the outer gear sleeve passes through one end of the inner gear sleeve and is inserted into the inner hole, forming a sealed connection therewith. At the same time, the outer teeth on the outer gear sleeve engage with the inner teeth in the inner hole of the inner gear sleeve. The end of the outer gear sleeve located outside the inner gear sleeve is detachably connected to the locking unit, and the other end of the inner gear sleeve is detachably connected to one end of the extension shaft.

[0010] In the above technical solution, the adaptive telescopic unit also includes an end plate, the outer periphery of the outer gear sleeve is provided with an end plate sealedly connected thereto, the end plate is detachably connected to one end of the inner gear sleeve, the other end of the inner gear sleeve has a connecting flange, and the inner gear sleeve is connected to one end of the extension shaft through the connecting flange.

[0011] In the above technical solution, the adaptive telescopic unit further includes a center plug, which is arranged in the inner hole of the outer gear sleeve to prevent the locking unit from being deformed when clamped and locked on the end of the outer gear sleeve.

[0012] In the above technical solution, the locking unit includes a flange inner ring, an outer ring and a locking bolt. The end of the outer gear sleeve is matched with the axial hole of the flange inner ring. The outer ring is sleeved on the outer periphery of the flange inner ring and is locked with the flange inner ring through the locking bolt. At the same time, the flange of the flange inner ring is connected to the first access end unit.

[0013] In the above technical solution, the first access end unit includes a first sleeve and a first diaphragm group, the first diaphragm group is arranged between the first sleeve and the flange inner ring of the locking unit, and the first sleeve is connected to the first diaphragm group and the flange inner ring as a whole.

[0014] In the above technical solution, a diaphragm connecting flange and a telescopic unit connecting flange are respectively provided at both ends of the extension shaft of the extension unit. The telescopic unit connecting flange at one end of the extension shaft is connected to the internal gear sleeve by bolts, and the diaphragm connecting flange at the other end is connected to the second access end unit by bolts.

[0015] In the above technical solution, the second access end unit includes a second shaft sleeve and a second diaphragm group, the second diaphragm group is arranged between the second shaft sleeve and the diaphragm connecting flange at the end of the extended shaft, and the second shaft sleeve and the second diaphragm group and the diaphragm connecting flange at the end of the extended shaft are staggered and connected to form a flexible whole through fasteners.

[0016] In the above technical solution, the diaphragm connecting flange and the telescopic unit connecting flange both have positioning steps, and both ends of the extended shaft are respectively mounted on the positioning steps of the diaphragm connecting flange and the telescopic unit connecting flange and welded together.

[0017] In the above technical solution, the interior of the inner gear sleeve has a stepped tooth groove cavity, and there are tooth grooves in the tooth groove cavity. The two ends of the tooth groove cavity are sealed and connected with the outer gear sleeve to form a sealed cavity. At the same time, the grease injected into the sealing cavity improves the smoothness of the axial misalignment movement of the outer gear sleeve relative to the inner gear sleeve.

[0018] The positive effects of the utility model are as follows: after adopting the long-spacing diaphragm coupling with adjustable length of the utility model, since the utility model comprises a first access end unit, a locking unit, an adaptive telescopic unit, an extension unit and a second access end unit arranged on a coaxial line,

[0019] The extension unit includes an extension shaft, and both ends of the extension shaft are provided with an adaptive telescopic unit and a second access end unit detachably connected thereto. At the same time, the first access end unit is detachably connected to the free end of the adaptive telescopic unit through a locking unit.

[0020] The adaptive telescopic unit includes an outer gear sleeve and an inner gear sleeve. A portion of the outer gear sleeve passes through one end of the inner gear sleeve and is inserted into the inner hole, forming a sealed connection therewith. At the same time, the outer teeth on the outer gear sleeve engage with the inner teeth in the inner hole of the inner gear sleeve. The end of the outer gear sleeve located outside the inner gear sleeve is detachably connected to the locking unit, and the other end of the inner gear sleeve is detachably connected to one end of the extension shaft.

[0021] During installation, the present invention is placed between two devices. According to the distance between the shaft end faces of the two devices, the adaptive telescopic unit is adjusted. That is, the inner gear sleeve and the outer gear sleeve are in a toothed spline matching structure. The outer gear sleeve can move axially relative to the inner gear sleeve, thereby achieving the purpose of adjusting the overall length of the present invention and accurately matching the actual distance between the shaft end faces of the two devices in different application scenarios.

[0022] During the specific operation process, even if the long rotor equipment expands due to increased temperature or axial movement occurs after operation, when the displacement exceeds the allowable value of the diaphragm itself, the adaptive telescopic unit will adaptively adjust to make the outer gear sleeve move relative to the inner gear sleeve along the axial direction, thereby preventing excessive deformation of the diaphragm and further improving the actual axial compensation capability of the coupling.

[0023] In summary, the utility model not only has adjustable axial length during installation, but also can be adaptively adjusted during operation, thereby preventing excessive deformation of the diaphragm when the axial displacement of the coupling exceeds the allowable value of the diaphragm itself, making the applicable field wider and the axial compensation capability greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0025] Figure 2 This is a structural diagram of the adaptive telescopic unit of the utility model;

[0026] Figure 3 It is a structural diagram of the locking unit of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and given embodiments, but the present invention is not limited thereto.

[0028] like Figure 1 、 2 3, a long-spacing diaphragm coupling with adjustable length comprises a first access end unit 1, a locking unit 2, an adaptive telescopic unit 3, an extension unit 4, and a second access end unit 5 arranged coaxially.

[0029] The extension unit 4 includes an extension shaft 41, and the two ends of the extension shaft 41 are respectively provided with an adaptive telescopic unit 3 and a second access end unit 5 detachably connected thereto. At the same time, the first access end unit 1 is detachably connected to the free end of the adaptive telescopic unit 3 through the locking unit 2.

[0030] The adaptive telescopic unit 3 includes an outer gear sleeve 31 and an inner gear sleeve 32. A portion of the outer gear sleeve 31 passes through one end of the inner gear sleeve 32 and is inserted into the inner hole, forming a sealed connection therewith. At the same time, the outer teeth on the outer gear sleeve 31 engage with the inner teeth in the inner hole of the inner gear sleeve 32. The end of the outer gear sleeve located outside the inner gear sleeve 32 is detachably connected to the locking unit 2, and the other end of the inner gear sleeve 32 is detachably connected to one end of the extension shaft 41.

[0031] like Figure 1 、 2 As shown, in order to facilitate the formation of a sealed assembly, the adaptive telescopic unit 3 also includes an end plate 33, and the outer periphery of the outer gear sleeve 31 is provided with an end plate 33 sealed therewith, and the end plate 33 is detachably connected to one end of the inner gear sleeve 32, and the other end of the inner gear sleeve 32 has a connecting flange, and the inner gear sleeve 32 is connected to one end of the extension shaft 41 through the connecting flange.

[0032] like Figure 1 、 2 As shown, in order to prevent excessive deformation when the outer gear sleeve is locked, the adaptive telescopic unit 3 also includes a center plug 34, which is arranged in the inner hole of the outer gear sleeve 31 to prevent the flange inner ring 21 of the locking unit 2 from being deformed when it is clamped and locked on the end of the outer gear sleeve.

[0033] like Figure 1 、 3 As shown, in order to achieve a locking connection between the first access end unit and the adaptive telescopic unit and prevent loosening, the locking unit 2 includes a flange inner ring 21, an outer ring 22 and a locking bolt. The end of the outer gear sleeve 31 is matched with the flange inner ring 21 in an axial hole. The outer ring 22 is sleeved on the outer periphery of the flange inner ring 21 and is locked with the flange inner ring 21 by the locking bolt. At the same time, the flange of the flange inner ring 21 is connected to the first access end unit 1.

[0034] like Figure 1 As shown, in order to facilitate quick connection with the corresponding equipment, the first access end unit 1 includes a first sleeve 11 and a first diaphragm group 12, the first diaphragm group 12 is arranged between the first sleeve 11 and the flange inner ring 21 of the locking unit 2, and the first sleeve 11 is connected to the first diaphragm group 12 and the flange inner ring 21 as a whole.

[0035] like Figure 1 As shown, in order to ensure that both ends of the extension unit can be stably connected to the adaptive telescopic unit and the second access end unit, and to achieve rapid positioning and assembly between different units to improve assembly efficiency, the two ends of the extension shaft 41 of the extension unit 4 are respectively provided with a diaphragm connecting flange 42 and a telescopic unit connecting flange 43, the telescopic unit connecting flange 43 at one end of the extension shaft 41 is connected to the inner gear sleeve 32 by bolts, and the diaphragm connecting flange 42 at the other end is connected to the second access end unit 5 by bolts.

[0036] like Figure 1 As shown, in order to facilitate quick connection with the corresponding equipment, the second access end unit 5 includes a second sleeve 51 and a second diaphragm group 52, and the second diaphragm group 52 is arranged between the second sleeve 51 and the diaphragm connecting flange 42 at the end of the extension shaft 41, and the second sleeve 51 and the second diaphragm group 52 and the diaphragm connecting flange 42 at the end of the extension shaft 41 are staggered and connected to form a flexible whole through fasteners.

[0037] like Figure 1 As shown, in order to achieve positioning assembly and improve the overall coaxiality of the coupling, the diaphragm connecting flange 42 and the telescopic unit connecting flange 43 both have positioning steps, and the two ends of the extended shaft 41 are respectively mounted on the positioning steps of the diaphragm connecting flange 42 and the telescopic unit connecting flange 43 and welded together.

[0038] Further, such as Figure 1 As shown, the interior of the inner gear sleeve 32 has a stepped tooth groove cavity with tooth grooves therein. The two ends of the tooth groove cavity are sealed with the outer gear sleeve 31 to form a sealed cavity. Grease injected into the sealed cavity improves the smoothness of axial displacement movement of the outer gear sleeve 31 relative to the inner gear sleeve 32. Therefore, the inner and outer gear sleeves of the present invention are provided with a toothed spline structure, allowing them to be displaced along the axial direction. The grease in the sealed cavity not only ensures smooth sliding and reduces wear, but also enables the transmission of corresponding torque. The adaptive telescopic unit enables the overall axial length of the coupling to be adjusted within a certain range.

[0039] When the present invention is installed, it is placed between two devices. According to the distance between the shaft end faces of the two devices, the adaptive telescopic unit 3 is adjusted. That is, the inner gear sleeve 32 and the outer gear sleeve 31 form a toothed spline matching structure. The outer gear sleeve 31 can move axially relative to the inner gear sleeve 32, thereby achieving the purpose of adjusting the overall length of the present invention and accurately matching the actual distance between the shaft end faces of the two devices in different application scenarios. It also reduces the previous user's precise control of the distance between the shaft end faces of the two devices, and no longer causes the loss of the actual axial compensation capacity of the coupling due to installation errors.

[0040] During the specific operation process, even if the thermal expansion of the long rotor equipment increases due to the increase in temperature after operation, when the displacement exceeds the allowable value of the diaphragm itself, the adaptive telescopic unit 3 will adaptively adjust to make the outer gear sleeve move axially relative to the inner gear sleeve, thereby preventing the diaphragm from excessive deformation and further improving the actual axial compensation capability of the coupling.

[0041] In summary, the utility model not only has adjustable axial length during installation, but also can be adaptively adjusted during operation, thereby preventing excessive deformation of the diaphragm when the axial displacement of the coupling exceeds the allowable value of the diaphragm itself, making the applicable field wider and the axial compensation capability greatly improved.

[0042] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A long-spacing diaphragm coupling with adjustable length, characterized by: It comprises a first access end unit (1), a locking unit (2), an adaptive telescopic unit (3), an extension unit (4) and a second access end unit (5) arranged on a coaxial line. The extension unit (4) comprises an extension shaft (41), and the two ends of the extension shaft (41) are respectively provided with an adaptive telescopic unit (3) and a second access end unit (5) detachably connected thereto. At the same time, the first access end unit (1) is detachably connected to the free end of the adaptive telescopic unit (3) via a locking unit (2). The adaptive telescopic unit (3) comprises an outer gear sleeve (31) and an inner gear sleeve (32), a portion of the outer gear sleeve (31) passes through one end of the inner gear sleeve (32) and is inserted into the inner hole, thereby forming a sealed connection therewith, while the outer teeth on the outer gear sleeve (31) mesh with the inner teeth in the inner hole of the inner gear sleeve (32), the end of the outer gear sleeve located outside the inner gear sleeve (32) is detachably connected to the locking unit (2), and the other end of the inner gear sleeve (32) is detachably connected to one end of the extension shaft (41).

2. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The adaptive telescopic unit (3) further comprises an end plate (33), the outer periphery of the outer gear sleeve (31) is provided with an end plate (33) which is sealed therewith, the end plate (33) being detachably connected to one end of the inner gear sleeve (32), the other end of the inner gear sleeve (32) being provided with a connecting flange, and the inner gear sleeve (32) being connected to one end of the extension shaft (41) via the connecting flange.

3. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The adaptive telescopic unit (3) further comprises a central plug (34), which is arranged in the inner hole of the outer gear sleeve (31) to prevent the locking unit (2) from deforming when clamping and locking on the end of the outer gear sleeve.

4. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The locking unit (2) comprises a flange inner ring (21), an outer ring (22) and a locking bolt. The end of the outer gear sleeve (31) is matched with the flange inner ring (21) in the form of an axial hole. The outer ring (22) is sleeved on the outer periphery of the flange inner ring (21) and is locked with the flange inner ring (21) through the locking bolt. At the same time, the flange of the flange inner ring (21) is connected to the first access end unit (1).

5. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The first access end unit (1) comprises a first shaft sleeve (11) and a first diaphragm group (12), wherein the first diaphragm group (12) is arranged between the first shaft sleeve (11) and the flange inner ring (21) of the locking unit (2), and the first shaft sleeve (11), the first diaphragm group (12) and the flange inner ring (21) are staggeredly connected to form a flexible whole through fasteners.

6. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: A diaphragm connecting flange (42) and a telescopic unit connecting flange (43) are respectively provided at both ends of the extension shaft (41) of the extension unit (4); the telescopic unit connecting flange (43) at one end of the extension shaft (41) is connected to the inner gear sleeve (32) via bolts, and the diaphragm connecting flange (42) at the other end is connected to the second access end unit (5) via bolts.

7. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The second access end unit (5) comprises a second shaft sleeve (51) and a second diaphragm group (52), wherein the second diaphragm group (52) is arranged between the second shaft sleeve (51) and the diaphragm connecting flange (42) at one end of the extension shaft (41), and the second shaft sleeve (51), the second diaphragm group (52) and the diaphragm connecting flange (42) at one end of the extension shaft (41) are staggered and connected to form a flexible whole through fasteners.

8. The adjustable length long-spacing diaphragm coupling according to claim 6, characterized in that: The diaphragm connecting flange (42) and the telescopic unit connecting flange (43) both have positioning steps, and both ends of the extended shaft (41) are respectively sleeved on the positioning steps of the diaphragm connecting flange (42) and the telescopic unit connecting flange (43) and welded together.

9. The adjustable length long-spacing diaphragm coupling according to claim 1, characterized in that: The inner gear sleeve (32) has a stepped tooth groove cavity inside, and the tooth groove cavity has tooth grooves. The two ends of the tooth groove cavity are sealed and connected with the outer gear sleeve (31) to form a sealed cavity. At the same time, the grease injected into the sealed cavity improves the smoothness of the axial misalignment movement of the outer gear sleeve (31) relative to the inner gear sleeve (32) and prevents wear.

Images