Diaphragm type compressor flywheel structure

Abstract

The utility model discloses a flywheel structure of a diaphragm type compressor, and belongs to the technical field of compressors. The end part of the crankshaft is connected with the flywheel, the expansion sleeve is sleeved on the crankshaft, the expansion sleeve is connected with the flywheel through a connecting piece, the end part of the crankshaft is provided with a limiting part, the inner side of the flywheel is provided with a limiting matching part, and the crankshaft is connected with the limiting matching part of the flywheel through the limiting part. And therefore, the mounting positions of the flywheel and the crankshaft are limited and locked. The flywheel connecting device is simple in structure, small in occupied space and high in mounting precision, quick positioning connection of the flywheel and the crankshaft is achieved through matched connection of the limiting matching portion on the inner side of the flywheel and the limiting portion on the crankshaft, safe and reliable component connection and simple and convenient disassembly are achieved through the expansion sleeve, and adjustability of flywheel mounting deviation is improved; the limiting part is connected with the limiting matching part, so that the mounting positions of the flywheel and the crankshaft are limited and locked, and the binding force of the flywheel and the crankshaft is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and more specifically relates to a diaphragm compressor flywheel structure. Background Art

[0002] At present, diaphragm compressors and liquid-driven compressors are commonly used in the field of hydrogen production and hydrogenation in the domestic market. Both types of machines are inseparable from the installation of a transmission flywheel, which is one of the important parts of the compressor. The diaphragm compressor is a reciprocating compressor that relies on the reciprocating motion of the diaphragm in the cylinder to compress and transport the gas. The diaphragm is clamped by two limiting plates along the periphery to form a cylinder. The diaphragm is driven mechanically or hydraulically to reciprocate in the cylinder, thereby achieving compression and transportation of the gas.

[0003] In the existing diaphragm compressor transmission system, the installation method of the compressor flywheel generally adopts a keyway connection, and the flywheel is installed on the power output end of the crankshaft. However, installing the flywheel on the crankshaft for power output through a keyway connection has the following disadvantages: first, stress concentration is prone to occur at the keyway, which may cause local fatigue cracks and damage, thereby affecting the reliability and service life of the connection; second, a high centering accuracy is required during installation, otherwise it is easy to cause imbalance and vibration, which in turn affects the smooth operation of the entire power system, and when transmitting a large torque, the keyway connection may not provide sufficient strength and stability; finally, compared with other connection methods, the installation and disassembly process of the keyway connection is more cumbersome, requiring a high level of craftsmanship and special tools. Utility Model Content

[0004] The utility model aims at solving the technical problems existing in the prior art and provides a diaphragm compressor flywheel structure.

[0005] In order to solve the above technical problems, the utility model includes a flywheel, a crankshaft, and a expansion sleeve. The end of the crankshaft is connected to the flywheel, the expansion sleeve is arranged on the crankshaft, and the expansion sleeve is connected to the flywheel through a connecting piece. A limiting portion is provided at the end of the crankshaft, and a limiting matching portion is provided on the inner side of the flywheel. The crankshaft is connected to the limiting matching portion of the flywheel through the limiting portion, thereby realizing the limiting locking of the installation position of the flywheel and the crankshaft.

[0006] Preferably, the limiting portion is a first limiting step arranged on the outer peripheral side of the crankshaft, and the limiting matching portion is a second limiting step arranged on the inner peripheral side of the flywheel, and the first limiting step is adaptively connected to the second limiting step.

[0007] Preferably, an axial mounting hole is provided in the middle of the flywheel, and the axial length of the first limiting step from the end of the crankshaft is matched with the axial length of the axial mounting hole.

[0008] Preferably, the second limiting step is arranged on the inner circumference of the axial mounting hole, the end of the crankshaft passes through the first end of the axial mounting hole, the expansion sleeve passes through the second end of the axial mounting hole and is connected to the flywheel through a connecting piece, and the expansion sleeve is arranged on the outer circumference of the end of the crankshaft.

[0009] Preferably, the expansion sleeve is a circular sleeve structure, the inner diameters of the left and right ends of the expansion sleeve are the same, and the inner diameter of the expansion sleeve is matched with the outer diameter of the crankshaft end.

[0010] Preferably, the inner wall surface of the expansion sleeve is extended into a rectangular structure, the outer diameters of the left and right ends of the expansion sleeve are the same, and a plurality of connecting through holes are arranged on the outer peripheral side of the expansion sleeve, and the connecting through holes are arranged to penetrate the axial direction of the expansion sleeve.

[0011] Preferably, a second matching portion is provided on the inner side of the flywheel, the crankshaft is connected to the second matching portion, and a positioning and adjusting cone sleeve is provided between the crankshaft and the second matching portion.

[0012] Preferably, the second matching portion is a matching conical surface arranged on the inner circumference of the flywheel end, and the positioning and adjusting cone sleeve is adaptively connected to the matching conical surface.

[0013] Preferably, the arc of the conical surface of the matching conical surface is 8-26°.

[0014] Preferably, the positioning adjustment cone sleeve is an open conical ring structure, the inner diameters of the inner circumference of the positioning adjustment cone sleeve are the same, the outer diameter of the positioning adjustment cone sleeve is compatible with the size of the second matching part of the flywheel, and the inner diameter of the positioning adjustment cone sleeve is compatible with the outer diameter of the crankshaft end.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model has a simple structure, occupies a small space and has a high installation precision. The limit fitting part on the inner side of the flywheel cooperates with the limit fitting part on the crankshaft to achieve a quick positioning connection between the flywheel and the crankshaft, and the expansion sleeve can realize a safe and reliable connection between the components and easy disassembly, thereby improving the adjustability of the flywheel installation deviation. The limit fitting part is connected with the limit fitting part to achieve limit locking of the installation position of the flywheel and the crankshaft, thereby improving the binding force between the flywheel and the crankshaft, and also improving the stability and reliability of their operation, and the flywheel will not become loose. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1This is a schematic diagram of the structure of the flywheel installation of the embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a crankshaft in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the flywheel in the embodiment of the utility model;

[0021] Figure 4 This is a schematic structural diagram of a expansion sleeve according to an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the top view of the expansion sleeve of the embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the disassembly and connection of the flywheel installation structure of the utility model;

[0024] Figure 7 It is a structural schematic diagram of a positioning and adjusting cone sleeve according to an embodiment of the utility model.

[0025] Explanation of symbols in the figure:

[0026] 1. Flywheel; 11. Axial mounting hole; 12. Matching conical surface; 2. Crankshaft; 3. Expansion sleeve; 31. Connecting through hole; 4. Limiting portion; 41. First limiting step; 5. Limiting matching portion; 51. Second limiting step; 6. Positioning adjustment cone sleeve; 7. High-strength bolt. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] See also Figure 1 The utility model provides a diaphragm compressor flywheel structure, including a flywheel 1, a crankshaft 2, and a clamping sleeve 3. The end of the crankshaft 2 is connected to the flywheel 1, the clamping sleeve 3 is sleeved on the crankshaft 2, and the clamping sleeve 3 is connected to the flywheel 1 through a connecting piece. A limiting portion 4 is provided at the end of the crankshaft 2, and a limiting matching portion 5 is provided on the inner side of the flywheel 1. The crankshaft 2 is connected to the limiting matching portion 5 of the flywheel 1 through the limiting portion 4, thereby realizing the limiting locking of the installation position of the flywheel 1 and the crankshaft 2.

[0029] The utility model has a simple structure, occupies a small space and has a high installation precision. The limiting fitting part 5 on the inner side of the flywheel 1 is matched and connected with the limiting part 4 on the crankshaft 2, which not only realizes the rapid positioning connection between the flywheel 1 and the crankshaft 2, but also realizes the safe and reliable connection of the components and the easy disassembly through the expansion sleeve 3, and improves the adjustability of the installation deviation of the flywheel 1; the limiting part 4 is connected with the limiting fitting part 5 to realize the limiting locking of the installation position of the flywheel 1 and the crankshaft 5, improves the binding force between the flywheel 1 and the crankshaft 2, and also improves the stability and reliability of its operation, and the flywheel 1 will not be loose.

[0030] In this embodiment, Figure 2 , Figure 3 As shown, the end of the crankshaft 2 is a circular shaft structure, the limiting portion 4 is a first limiting step 41 arranged on the outer peripheral side of the crankshaft end, and the limiting matching portion 5 is a second limiting step 51 arranged on the inner peripheral side of the flywheel 1. The first limiting step 41 is adaptively connected with the second limiting step 51, thereby realizing the rapid installation of the flywheel 1 and the crankshaft 2, and implementing forced positioning of the flywheel 1 installed on the crankshaft 2.

[0031] Specifically, the flywheel 1 is a disc-shaped part with a large moment of inertia, which is installed at the rear end of the crankshaft 2. It has the functions of storing energy and making the crankshaft rotate at a uniform speed. An axial mounting hole 11 is provided in the middle of the flywheel 1. The flywheel 1 is connected to the crankshaft 2 through the axial mounting hole 11, and the axial length of the first limiting step 41 from the end of the crankshaft 2 is adapted to the axial length of the axial mounting hole 11.

[0032] The first limiting step 41 is a two-layer step raised end surface structure arranged on the outer circumference of the crankshaft 2, and the second limiting step 51 is a two-layer step structure arranged on the inner circumference of the axial mounting hole 11 of the flywheel 1. The end of the crankshaft 2 passes through the first end of the axial mounting hole 11, and the expansion sleeve 3 passes through the second end of the axial mounting hole 11 and is connected to the flywheel 1 through a connecting piece. The expansion sleeve 3 is arranged between the outer circumference of the end of the crankshaft 2 and the inner circumference of the axial mounting hole 11. When the flywheel 1 is installed, the convex end surface of the crankshaft 2 and the positioning adjustment cone sleeve 6 and the second limiting step 51 of the flywheel 1 are limited, thereby forcibly and accurately locking the installation position of the flywheel 1 on the crankshaft 2.

[0033] In this embodiment, Figure 4 , Figure 5 As shown, the expansion sleeve 3 is a circular sleeve structure, so that the inner diameters of the left and right ends of the expansion sleeve 3 are the same, and the outer diameters of the left and right ends of the expansion sleeve 3 are also the same, that is, the inner wall section of the expansion sleeve 3 is a horizontal straight line, and the inner wall surface of the expansion sleeve 3 extends into a rectangular structure.

[0034] Specifically, the inner diameter of the expansion sleeve 3 is adapted to the outer diameter of the end of the crankshaft 2, the outer diameter of the expansion sleeve 3 is adapted to the inner diameter of the axial mounting hole 11 of the flywheel 1, and a plurality of connecting through holes 31 are provided on the outer peripheral side of the expansion sleeve 3. The plurality of connecting through holes 31 are evenly distributed along the circumference of the expansion sleeve 3, the connecting through holes 31 are circular hole-shaped structures, and the connecting through holes 31 extend axially through the expansion sleeve 3.

[0035] Furthermore, in this embodiment, if Figure 6 As shown, the connection piece used to connect the expansion sleeve 3 and the flywheel 1 is a high-strength bolt 7, which is arranged in the connection through hole 31 of the expansion sleeve 3, and then the expansion sleeve 3 is connected to the flywheel 1 through the high-strength bolt 7. Since the expansion sleeve 3 is a keyless connection device, a huge clamping force is generated between the flywheel 1 and the shaft through the action of the high-strength bolt 7, thereby realizing a keyless connection between the machine part and the shaft, which is not only easy to install and disassemble, but also does not require heating, cooling or using traditional connection methods such as shaft end keyways, and can transmit larger torque and axial force.

[0036] During the installation process, the expansion sleeve 3 relies on friction to achieve connection and transmit torque. The expansion sleeve 3 is composed of an inner sleeve, an outer sleeve and a high-strength bolt. During installation, by tightening the high-strength bolt 7, the inner sleeve and the outer sleeve move in opposite directions, so that the inner sleeve on the shaft and the outer sleeve in the flywheel hole generate radial pressure, forming friction and achieving a tight connection. In addition, in this embodiment, the connecting through hole 31 provided on the expansion sleeve 3 is a reverse threaded hole, and the high-strength bolt 7 is screwed in to push the expansion sleeve 3, which not only has the function of quickly locking the position of the expansion sleeve 3 during installation, but also can quickly remove the flywheel 1.

[0037] like Figure 1 As shown, in this embodiment, a second matching portion is provided on the inner side of the flywheel 1, the crankshaft 2 is connected to the second matching portion, and a positioning and adjusting cone sleeve 6 is provided between the crankshaft 2 and the second matching portion.

[0038] Specifically, Figure 3 , Figure 6As shown, the second matching portion is a matching conical surface 12 arranged on the end face of the axial mounting hole 11 of the flywheel 1, and the matching conical surface 12 is a conical surface arranged on the inner side of the center of the flywheel 1. The positioning and adjusting cone sleeve 6 is adaptively connected with the matching conical surface 12, and the positioning and adjusting cone sleeve 6 is arranged between the inner circumference of the matching conical surface 12 and the outer circumference of the end of the crankshaft 2. Under the action of the limiting steps on the inner sides of the crankshaft 2 and the flywheel 1, the utility model realizes the rapid positioning and connection of the flywheel 1, and the positioning and adjusting cone sleeve 6 cooperates with the matching conical surface 12 of the flywheel 1, so that the flywheel 1 is convenient and quick to install, creating the conditions for the rapid positioning and disassembly of the expansion sleeve 3 and the flywheel 1, improving the adjustability of the installation deviation of the flywheel 1, overcoming the temperature rise of the expansion sleeve 3 and the inner diameter of the flywheel 1 on the friction working surface, which is beneficial to increasing the engagement frequency of the expansion sleeve 3 and the flywheel 1, thereby facilitating the improvement of the productivity of the diaphragm compressor.

[0039] Furthermore, as a preferred embodiment of the present invention, the arc of the conical surface 12 on the inner side of the flywheel 1 can be set to 8-26°.

[0040] In this embodiment, Figure 7 As shown, the positioning adjustment cone sleeve 6 is an open-type conical ring structure, and the top of the cone sleeve presents a cone structure at a certain angle, so that the outer diameters of the two ends of the positioning adjustment cone sleeve 6 are different, and the outer diameter of the top of the cone sleeve is smaller than the outer diameter of the bottom of the cone sleeve, that is, the outer wall section of the cone sleeve is an inclined straight line; the inner diameter of the top of the positioning adjustment cone sleeve 6 is the same as the inner diameter of the bottom, and the inner diameters of the inner circumference of the cone sleeve are the same. Moreover, the outer diameter of the positioning adjustment cone sleeve 6 is adapted to the size of the flywheel 1 matching the conical surface 12, and the inner diameter of the positioning adjustment cone sleeve 6 is adapted to the outer diameter of the end of the crankshaft 2.

[0041] Furthermore, the positioning adjustment cone sleeve 6 cooperates with the first limit step 41 and the second limit step 51 to achieve limit adjustment. When the flywheel 1 reaches the predetermined installation position, the first limit step 41 cooperates with the second limit step 51. Under the cooperation of the positioning adjustment cone sleeve 6, the flywheel 1 is prevented from continuing to move, thereby effectively controlling the axial position of the flywheel 1 installation, ensuring the accuracy and stability of the flywheel 1 installation, and ensuring that it will not be excessively displaced during operation, thereby maintaining the normal operation and performance of the entire power system.

[0042] The utility model comprises a flywheel 1, a crankshaft 2, a clamping sleeve 3, and a positioning and adjusting cone sleeve 6. The clamping sleeve 3 is connected to the flywheel 1 through a high-strength bolt 7 and is sleeved on the end of the crankshaft 2. The positioning and adjusting cone sleeve 6 is arranged between the outer peripheral side of the end of the crankshaft 2 and the inner shaft side of the matching conical surface 12 of the flywheel 1, and the crankshaft 2 and the flywheel 1 are also matched with each other through a first limiting step 41 and a second limiting step 51. The utility model provides mutually matching limiting steps on the inner side of the flywheel 1 and the corresponding end of the crankshaft 2. When the flywheel 1 is installed, The raised section of the crankshaft 2 and the two steps of the cone sleeve and the flywheel 1 are used to limit the flywheel 1, thereby forcing the installation position of the flywheel 1 on the crankshaft 2 to be accurately locked. In addition, the positioning and adjusting cone sleeve 6 is provided to make the installation of the flywheel 1 more convenient and quick, create the conditions for the rapid positioning and disassembly of the expansion sleeve 3 and the flywheel 1, improve the adjustability of the installation deviation of the flywheel 1, overcome the temperature rise of the expansion sleeve 3 and the inner diameter of the flywheel 1 on the friction working surface, and help to increase the engagement frequency of the expansion sleeve 3 and the flywheel 1, thereby helping to improve the productivity of the diaphragm compressor.

[0043] The diaphragm compressor flywheel structure provided by the utility model can be widely used in the compressor industry. It can implement forced positioning of the flywheel installed on the main engine crankshaft and realize safe, reliable and easy disassembly functions through the expansion sleeve. It has a simple and reasonable structure, convenient processing and assembly, small space occupation, and strong processability and significant economic benefits. In addition, the utility model realizes the limited locking of the installation position of the flywheel and the crankshaft through the mutual cooperation of the limit steps and the installation of the positioning adjustment cone sleeve, and adopts the cone surface cooperation. It is not only simple and convenient to install, with high installation accuracy, but also conducive to improving the engagement force between the flywheel and the crankshaft. It is stable and reliable during operation, the flywheel will not loosen, and the flywheel and the crankshaft will not generate temperature rise on the friction working surface. When disassembling, special hydraulic tools are used, which will not cause the parts to be knocked and deformed, and it is convenient for installation and maintenance.

[0044] In the description of the present invention, it should be understood that terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A diaphragm compressor flywheel structure, comprising a flywheel, a crankshaft, and a expansion sleeve, wherein the end of the crankshaft is connected to the flywheel, and the expansion sleeve is sleeved on the crankshaft, characterized in that: The expansion sleeve is connected to the flywheel through a connecting piece, a limiting portion is provided at the end of the crankshaft, a limiting matching portion is provided on the inner side of the flywheel, and the crankshaft is connected to the limiting matching portion of the flywheel through the limiting portion, thereby realizing the limiting locking of the installation position of the flywheel and the crankshaft.

2. A diaphragm compressor flywheel structure according to claim 1, characterized in that: The limiting portion is a first limiting step arranged on the outer peripheral side of the crankshaft, and the limiting matching portion is a second limiting step arranged on the inner peripheral side of the flywheel, and the first limiting step is adaptively connected to the second limiting step.

3. A diaphragm compressor flywheel structure according to claim 2, characterized in that: An axial mounting hole is provided in the middle of the flywheel, and the axial length of the first limiting step from the end of the crankshaft is matched with the axial length of the axial mounting hole.

4. A diaphragm compressor flywheel structure according to claim 3, characterized in that: The second limiting step is arranged on the inner circumference of the axial mounting hole, the end of the crankshaft passes through the first end of the axial mounting hole, the expansion sleeve passes through the second end of the axial mounting hole and is connected to the flywheel through the connecting piece, and the expansion sleeve is arranged on the outer circumference of the end of the crankshaft.

5. A diaphragm compressor flywheel structure according to claim 1, characterized in that: The expansion sleeve is a circular sleeve structure, the inner diameters of the left and right ends of the expansion sleeve are the same, and the inner diameter of the expansion sleeve is matched with the outer diameter of the crankshaft end.

6. A diaphragm compressor flywheel structure according to claim 5, characterized in that: The inner wall surface of the expansion sleeve is extended into a rectangular structure. The outer diameters of the left and right ends of the expansion sleeve are the same. A plurality of connecting through holes are arranged on the outer peripheral side of the expansion sleeve. The connecting through holes penetrate the axial direction of the expansion sleeve.

7. A diaphragm compressor flywheel structure according to any one of claims 1 to 6, characterized in that: A second matching portion is provided on the inner side of the flywheel, the crankshaft is connected to the second matching portion, and a positioning and adjusting cone sleeve is provided between the crankshaft and the second matching portion.

8. A diaphragm compressor flywheel structure according to claim 7, characterized in that: The second matching portion is a matching conical surface arranged on the inner circumference of the flywheel end, and the positioning and adjusting cone sleeve is adaptively connected to the matching conical surface.

9. A diaphragm compressor flywheel structure according to claim 8, characterized in that: The conical surface curvature of the matching conical surface is 8-26°.

10. A diaphragm compressor flywheel structure according to claim 7, characterized in that: The positioning adjustment cone sleeve is an open conical ring structure, the inner diameters of the inner circumference of the positioning adjustment cone sleeve are the same, the outer diameter of the positioning adjustment cone sleeve is matched with the size of the second matching part of the flywheel, and the inner diameter of the positioning adjustment cone sleeve is matched with the outer diameter of the crankshaft end.

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