Coupling

Abstract

The utility model belongs to the technical field of mechanical transmission, and particularly relates to a coupler. The connecting structure is used for connecting a variable-speed motor shaft and a compressor shaft, a flange structure is fixed at the end of the variable-speed motor shaft, the compressor shaft is a conical shaft, and the connecting structure is characterized by comprising a first mounting disc, a second mounting disc, a middle section and a spacer sleeve, the first mounting disc, the middle section, the spacer sleeve and the second mounting disc are all provided with cylindrical bodies, and the ends of the cylindrical bodies are fixedly connected in sequence; wherein the end part of the first mounting disc is connected to the variable-speed motor shaft, and the second mounting disc is connected to the compressor shaft. According to the structure, the connection mode of the flange plate is adopted, the internal seam allowance is matched, and on the premise that the coaxiality is guaranteed, reliable connection is guaranteed through pretightening force work of the bolt. Installation and disassembly are convenient, extra assembly space is not needed, workpieces are not damaged, and repeated disassembly and assembly can be conveniently achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical transmission, in particular to a coupling. Background Art

[0002] A coupling is a mechanical device that connects two shafts, or a shaft and a rotating part, transmitting motion and torque so that they rotate together without disengaging. It is an indispensable connecting component in mechanical transmission shaft systems and comes in many varieties, with large usage and a wide range of applications. It is a universal basic transmission component. There are many types of couplings, including rigid couplings, flexible couplings, elastic couplings, and safety couplings. Their basic function is to transmit motion and torque. However, depending on the type of coupling, in addition to the basic function, other auxiliary functions are also provided, such as compensation for axial, radial, and angular displacement, as well as varying degrees of vibration reduction, buffering, and overload safety protection, to meet the needs of different mechanical equipment transmission systems. Different classification methods are used based on the location and connection location of the coupling.

[0003] After conventional couplings are installed on the unit, unless there are special maintenance issues, they basically do not need to be disassembled after normal operation and can continue to operate for many years. Therefore, the connection method with a tapered hole interference fit is a very suitable design solution, and it has many years of successful cases to prove it. However, for experimental units, frequent disassembly is required. When the shaft hole uses a tapered shaft interference fit, it is easy to cause damage and scratches to the shaft and hole during disassembly. The interference fit is relatively firm, and special disassembly tools, oil pumps, etc. are required for disassembly. Sufficient disassembly space must also be left. For couplings with small shaft head spacing, disassembly is very difficult, and there is not enough space for disassembly tools. In addition, during the processing and installation of the coupling, errors in the total length are inevitable, making assembly impossible. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a coupling for connecting the speed changer shaft and the compressor shaft, wherein the speed changer shaft end is fixed with a flange structure, and the compressor shaft is a tapered shaft, including a first mounting plate, a second mounting plate, an intermediate section and a spacer sleeve, wherein the first mounting plate, the intermediate section, the spacer sleeve and the second mounting plate all have a cylindrical body and their ends are fixedly connected in sequence; wherein the end of the first mounting plate is connected to the speed changer shaft, and the second mounting plate is connected to the compressor shaft.

[0005] Furthermore, the first mounting plate is a cylindrical structure with a circle of protrusions at both ends. The left end protrusion is used to be bolted to the flange structure at the end of the transmission shaft; a diaphragm group is sandwiched between the right end protrusion and the left end protrusion of the middle section, and then connected by bolts.

[0006] Furthermore, the middle section and the end of the spacer sleeve are fixed by end protrusions and matching bolts; wherein the middle section and the inner diameter side connection of the spacer sleeve protrusion are both provided with a stop, specifically, a circle of recessed annular step surface is provided on the inner end of the middle sleeve end face, and a circle of raised platforms are provided on the middle sleeve cross section to match; a plurality of adjustment gaskets are provided between the two raised end faces, and the inner diameter surface of the adjustment gasket is in contact and support connection with the outer diameter surface of the raised platform of the spacer sleeve stop, so as to adjust the installation distance between the two end faces.

[0007] Furthermore, the inner hole of the second mounting plate is a tapered hole, and a circle of protrusions is provided on the outer diameter surface. A diaphragm assembly is provided between the protrusion and the end face protrusion of the spacer sleeve, and is fixedly connected by bolts, and a part of the body is located inside the middle sleeve.

[0008] Furthermore, a stop is provided on the outer periphery of the end portion of the second mounting plate body extending into the intermediate sleeve.

[0009] In the structure of this utility model, the first mounting plate and the speed changer are connected by a flange, and the internal stoppers cooperate to ensure a reliable connection by the pre-tightening force of the bolts while ensuring coaxiality. It is easy to install and disassemble, does not require additional assembly space, does not damage the workpiece, and can be easily disassembled and assembled multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the middle K region;

[0012] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of the middle J region;

[0013] Among them, 1. First mounting plate; 2. Second mounting plate; 3. Middle section; 4. Spacer sleeve; 5. Diaphragm group; 6. Adjustment gasket; 7. Stopper. DETAILED DESCRIPTION

[0014] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] refer to Figure 1-3The utility model provides a coupling for connecting a speed changer shaft and a compressor shaft. The speed changer shaft end is fixed with a flange structure. The compressor shaft is a tapered shaft, including a first mounting plate 1, a second mounting plate 2, an intermediate section 3 and a spacer sleeve 4. The first mounting plate 1, the intermediate section 3, the spacer sleeve 4 and the second mounting plate 2 all have a cylindrical body and are fixedly connected at their ends in sequence; the end of the first mounting plate 1 is connected to the speed changer shaft, and the second mounting plate 2 is connected to the compressor shaft.

[0016] As an improvement to this solution, the first mounting plate 1 is a cylindrical structure with a ring of protrusions at each end. The left protrusion is used to bolt to the flange structure at the end of the transmission shaft. The right protrusion and the left protrusion of the middle section 3 sandwich a diaphragm assembly 5, which is also bolted together. The diaphragm is a flexible connection that can absorb axial and angular deviations generated during unit operation. It absorbs unit vibrations and corrects these axial and angular misalignments through the flexible deformation of the diaphragm.

[0017] As an improvement, the intermediate section 3 and the ends of the spacer sleeve 4 are secured together by bolts with mating protrusions at the ends. A stopper is provided at the inner diameter connection between the intermediate section 3 and the protrusions of the spacer sleeve 4. Specifically, a recessed annular step surface is provided on the inner end of the intermediate sleeve end face, matched with a raised platform on the intermediate sleeve cross-section. Multiple adjustment shims 6 are positioned between the two raised end faces. The inner diameter surfaces of these adjustment shims 6 contact and support the outer diameter surfaces of the raised platforms on the stopper of the spacer sleeve 4, forming a joint between the spacer sleeve 4 and the intermediate section 3. The function of these shims is to adjust the overall length by adding or removing them, reducing the cumulative error.

[0018] As an improvement to the solution, the inner hole of the second mounting plate 2 is a tapered hole, and a circle of protrusions is provided on the outer diameter surface. A diaphragm group 5 is provided between the protrusion and the end face protrusion of the spacer sleeve 4, and is fixedly connected by bolts, and part of the main body is located inside the middle sleeve.

[0019] As an improvement, a stopper 7 is provided on the outer periphery of the end of the second mounting plate 2, which extends into the intermediate sleeve. This stopper 7 is a reserved dimension to facilitate subsequent commissioning. Connecting a power-end flange to this coupling stop facilitates achieving the desired torque and speed for this section of the unit. The corresponding flange size can be matched to the existing coupling stop dimensions to ensure excellent coaxiality.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coupling for connecting a speed changer shaft and a compressor shaft, wherein the speed changer shaft end is fixed with a flange structure and the compressor shaft is a tapered shaft, characterized in that: It includes a first mounting plate, a second mounting plate, an intermediate section and a spacer sleeve. The first mounting plate, the intermediate section, the spacer sleeve and the second mounting plate all have a cylindrical body and their ends are fixedly connected in sequence; the end of the first mounting plate is connected to the speed change shaft, and the second mounting plate is connected to the compressor shaft.

2. A coupling according to claim 1, characterized in that: The first mounting plate is a cylindrical structure with a circle of protrusions at both ends. The left end protrusion is used to be bolted to the flange structure at the end of the transmission shaft; the diaphragm group is sandwiched between the right end protrusion and the left end protrusion of the middle section, and then connected by bolts.

3. A coupling according to claim 1, characterized in that: The middle section and the end of the spacer sleeve are fixed by the end protrusion and matching bolts; the middle section and the inner diameter side connection of the spacer sleeve protrusion are both provided with a stop, specifically, a circle of recessed annular step surface is provided on the inner end of the middle sleeve end face, and a circle of raised platforms are provided on the middle sleeve cross section to match; a plurality of adjustment gaskets are provided between the two raised end faces, and the inner diameter surface of the adjustment gasket is in contact and supported connection with the outer diameter surface of the raised platform of the spacer sleeve stop, so as to adjust the installation distance between the two end faces.

4. A coupling according to claim 1, characterized in that: The inner hole of the second mounting plate is a tapered hole, and a circle of protrusions is provided on the outer diameter surface. A diaphragm assembly is provided between the protrusion and the end face protrusion of the spacer sleeve, and is fixedly connected by bolts, and a part of the body is located inside the middle sleeve.

5. A coupling according to claim 1, characterized in that: A stop is provided on the outer periphery of the end portion of the second mounting plate body extending into the middle sleeve.

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