Single-hinge-point film disc coupler suitable for high-speed large-compensation shaft system

Abstract

The invention relates to a shaft system single-hinge-point membrane disc coupler, in particular to a shaft system single-hinge-point membrane disc coupler which converts a bilateral double-hinge-point coupler dynamics calculation model into a bilateral single-hinge-point coupler dynamics calculation model to avoid translation and coning vibration of a shaft system at the position. And the connector can be applied to high-speed shafting connection occasions. The two single-hinge-point membrane disc couplings are symmetrically arranged at the two ends of the transmission shaft, the membrane disc on one side of the U-shaped membrane disc on each single-hinge-point membrane disc coupler is connected with the transmission shaft, the membrane disc on the other side of the U-shaped membrane disc on each single-hinge-point membrane disc coupler is connected with the positioning flange, and the positioning bolt connecting piece is installed on the inner ring of the positioning flange. The positioning bolt connecting piece is connected with the inner ring cheek plates of the U-shaped membrane discs, the outer ring of the positioning flange on one U-shaped membrane disc is connected with the host end, and the outer ring of the positioning flange on the other U-shaped membrane disc is connected with the load end. The invention is applied to the field of shafting connection.

Description

Technical Field

[0001] The invention relates to a single-hinge-point diaphragm coupling for a shaft system, and in particular to a single-hinge-point diaphragm coupling suitable for a high-speed and large-compensation shaft system. The invention is applied to the connection field of shaft systems. Background Art

[0002] With the continuous development and upgrading of marine power systems, more and higher requirements have been put forward for various performance indicators of couplings, such as high torque speed, large compensation, low inertia, lightweight, etc. Due to the limitations of space layout, ships have strict requirements on the outer diameter size of the shaft connection structure. At the same time, the compact structural size can better meet the requirements of the rotor critical speed for the working speed avoidance rate. Small size and lightweight are an important direction for the development of marine couplings. The diaphragm coupling is suitable for high-speed unit shaft connection due to its superior characteristics such as high torque diameter ratio and high torque weight ratio. In recent years, the requirements for elastic installation of marine main engines have continued to increase. In order to increase the compensation capacity of the coupling, on the one hand, the compensation capacity can be improved by increasing the deformation size of the diaphragm surface, and on the other hand, the compensation capacity can be improved by increasing the number of flexible elements. Many applications limit the use of large outer diameter couplings, and multi-diaphragm couplings are increasingly used in high-performance marine power transmission systems. The conventional double-sided single diaphragm coupling structure is such as Figure 1 As shown in the figure, the compensation capacity of the coupling is the sum of the compensation capacities of the two diaphragm discs. To increase the compensation capacity, one more diaphragm disc can be added on each side to form a double-sided double-diaphragm coupling structure, such as Figure 2 As shown in the figure, the compensation capacity of the coupling is the sum of the compensation capacities of the four diaphragms.

[0003] In the calculation of shaft system dynamics, it is necessary to meet the requirements of the rotor critical speed for the working speed avoidance rate. In the critical speed calculation, the diaphragm can be simplified as a hinge point that can produce bending deformation. The structure of the double-sided single diaphragm coupling is as follows: Figure 1 When conducting shaft system dynamics analysis, it can be simplified to a double-sided single hinge structure. The double-sided single hinge structure coupling dynamics analysis model is as follows: Figure 3 The double-sided double-diaphragm coupling structure of the traditional structural connection form is as follows Figure 2 When analyzing the dynamics of a shaft system, it can be simplified to a double-sided double-hinge structure. In addition to rotational vibration, the shaft system where the coupling is located also has translational vibration, such as Figure 4 With cone vibration Figure 5This situation increases the number of critical speed resonance points of the rotor in the multi-hinge system. For high-speed shafting systems under certain specific working conditions, no matter how the shafting components are optimized, the critical speeds of multiple rotors in the double-sided double-hinge diaphragm coupling structure cannot simultaneously meet the requirements of the rotor critical speed for the working speed avoidance rate, and the translational vibration and conical vibration of the multi-hinge shafting will reduce the first-order critical speed of the shafting rotor, and some critical speeds are lower than the working speed of the high-speed shafting, which makes it inevitable for the high-speed shafting to face resonance during the startup and speed-up process. Summary of the invention

[0004] The purpose of the present invention is to provide a single-hinge diaphragm coupling, which converts the dynamic calculation model of a double-sided double-hinge coupling into a double-sided single-hinge coupling dynamic calculation model, thereby avoiding translational and conical vibrations of the shaft system at that location, and can be applied to high-speed shaft system connection occasions.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, comprising a U-shaped diaphragm, a positioning flange and a positioning bolt connector;

[0007] Two single-hinge diaphragm disc couplings are symmetrically arranged at both ends of the transmission shaft. One side of the U-shaped diaphragm disc on each single-hinge diaphragm disc coupling is connected to the transmission shaft, and the other side of the U-shaped diaphragm disc on the single-hinge diaphragm disc coupling is connected to the positioning flange. The inner ring of the positioning flange is installed with a positioning bolt connecting piece, which is connected to the cheek plate of the inner ring of the U-shaped diaphragm disc. The outer ring of the positioning flange on one U-shaped diaphragm disc is connected to the main engine end, and the outer ring of the positioning flange on the other U-shaped diaphragm disc is connected to the load end.

[0008] Further, the positioning bolt connector includes a positioning bolt, an axial adjustment pad, a positioning pad, a positioning sleeve, a nut and two rubber pads;

[0009] The fixed end of the positioning bolt is connected to the inner ring of the positioning flange, and the axial adjustment pad, the positioning pad, a rubber pad, the inner ring cheek plate of the U-shaped diaphragm disk, another rubber pad, the positioning sleeve and the nut are sequentially mounted on the positioning bolt, and the nut is threadedly connected to the positioning bolt.

[0010] Furthermore, the diaphragm disc of the U-shaped diaphragm disc is detachably connected to the positioning flange via a plurality of bolts, and the plurality of bolts are evenly distributed along the radial direction.

[0011] Furthermore, the fixed end of the positioning bolt is detachably connected to the inner ring of the positioning flange via a plurality of bolts, and the plurality of bolts are evenly distributed in the radial direction.

[0012] Furthermore, the membrane discs on both sides of the U-shaped membrane disc are an integrated structure.

[0013] Furthermore, the positioning flange is a rigid flange.

[0014] Furthermore, the outer ring of the U-shaped diaphragm disk is radially matched with the outer ring of the positioning flange by a stopper, the inner ring of the positioning flange is radially matched with the fixed end of the positioning bolt by a stopper, the positioning sleeve is radially matched with the positioning bolt by a stopper, and the inner ring cheek plate of the U-shaped diaphragm disk is radially matched with the positioning sleeve by a stopper.

[0015] Furthermore, the positioning flange and the main engine shaft, the U-shaped diaphragm disc and the positioning flange, and the positioning flange and the load end are all connected and fixed by flange connection.

[0016] Beneficial effects of the present invention:

[0017] 1. The single-hinge diaphragm coupling provided in the present application converts the structural dynamics analysis model of the double-hinge diaphragm coupling into a single-hinge diaphragm coupling structural dynamics analysis model, thereby effectively avoiding the occurrence of translational vibration and conical vibration of the coupling shaft rotor system, and is more suitable for high-speed shaft connection occasions.

[0018] 2. The single hinge point diaphragm coupling provided is designed and processed into an integrated U-shaped diaphragm disc on one side, which retains the axial deformation compensation capability of the two diaphragm discs and is more suitable for shaft connection occasions with greater compensation capability requirements.

[0019] 3. The present application sets a rubber damping structure in the single-hinge U-shaped diaphragm coupling to increase system damping, which can effectively suppress the vibration of the rotor system on the unit.

[0020] 4. The present invention provides a positioning structure to limit the bending freedom of the diaphragm disc, so that the U-shaped diaphragm disc can limit the bending freedom of one side of the diaphragm disc while retaining the axial deformation compensation ability of the two diaphragm discs, and retaining the bending freedom of the other side of the diaphragm disc, that is, retaining its angular deformation compensation ability. When performing dynamic calculations, the U-shaped diaphragm disc can be simplified to a single-hinge structural dynamic calculation model, effectively avoiding the translational vibration vibration mode of the coupling shaft system rotor system at this location Figure 4 Conical vibration mode Figure 5 , which can make the double-sided double-diaphragm coupling with greater compensation capacity better used in high-speed shaft connection occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a double-sided single-diaphragm coupling in the prior art.

[0022] Figure 2 It is a schematic diagram of the structure of a double-sided double-diaphragm coupling in the prior art.

[0023] Figure 3 It is a schematic diagram of the rotational vibration mode of the double-sided single-hinge coupling structure in the prior art.

[0024] Figure 4It is a schematic diagram of the translational vibration mode of the double-sided double-hinge coupling structure in the prior art.

[0025] Figure 5 It is a schematic diagram of the conical vibration mode of the double-sided double-hinge coupling structure in the prior art.

[0026] Figure 6 This is a schematic diagram of the layout of the single-hinge diaphragm coupling in the unit.

[0027] Figure 7 It is a schematic diagram of the overall structure in this application.

[0028] Figure 8 This is a partial enlarged view of the structure of this application.

[0029] Fig. 9 This is a diagram showing the structural changes of a single-hinge diaphragm coupling when the axial distance of the shaft system decreases.

[0030] Fig.10 This is a diagram showing the structural changes of a single-hinge diaphragm coupling when the axial distance of the shaft system increases. DETAILED DESCRIPTION

[0031] Specific implementation method 1: Combination Figure 6-Figure 10 The present embodiment is described as a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, which comprises a U-shaped diaphragm 1, a positioning flange 2 and a positioning bolt connector;

[0032] Two single-hinge diaphragm disc couplings are symmetrically arranged at both ends of the transmission shaft. One side of the U-shaped diaphragm disc 1 on each single-hinge diaphragm disc coupling is connected to the transmission shaft, and the other side of the U-shaped diaphragm disc 1 on the single-hinge diaphragm disc coupling is connected to the positioning flange 2. The inner ring of the positioning flange 2 is installed with a positioning bolt connecting piece, and the positioning bolt connecting piece is connected to the inner ring cheek plate of the U-shaped diaphragm disc 1. The outer ring of the positioning flange 2 on one U-shaped diaphragm disc 1 is connected to the main engine end, and the outer ring of the positioning flange 2 on the other U-shaped diaphragm disc 1 is connected to the load end.

[0033] In the present embodiment, the U-shaped diaphragm disc 1 in the single-hinge diaphragm disc coupling is designed to have the two inner circles of the diaphragm discs as an integrated form, which limits the bending freedom of the diaphragm disc on one side, and only the diaphragm disc on the other side has bending freedom, thereby changing the double-hinge coupling structure into a single-hinge coupling structure, while retaining the axial compensation capability of the diaphragm discs on both sides.

[0034] Specific implementation method 2: Combination Figure 7-10 This embodiment is described. This embodiment is a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system. The positioning bolt connection part includes a positioning bolt 3, an axial adjustment pad 4, a positioning pad 5, a positioning sleeve 7, a nut 8 and two rubber pads 6;

[0035] The fixed end of the positioning bolt 3 is connected to the inner ring of the positioning flange 2, and the axial adjustment pad 4, the positioning pad 5, a rubber pad 6, the inner ring cheek plate of the U-shaped diaphragm disk 1, another rubber pad 6, the positioning sleeve 7 and the nut 8 are sequentially sleeved on the positioning bolt 3, and the nut 8 is threadedly connected to the positioning bolt 3. Other methods are the same as the specific implementation method 1.

[0036] Specific implementation method three: Combination Figure 7-10 This embodiment describes a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, wherein the diaphragm of the U-shaped diaphragm 1 is detachably connected to the positioning flange 2 by multiple bolts, and the multiple bolts are evenly distributed in the radial direction. Other methods are the same as those of the second embodiment.

[0037] Specific implementation method four: Combination Figure 7-10 This embodiment describes a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, wherein the fixed end of the positioning bolt 3 is detachably connected to the inner ring of the positioning flange 2 by multiple bolts, and the multiple bolts are evenly distributed in the radial direction. Other methods are the same as those of the second embodiment.

[0038] Specific implementation method five: Combination Figure 7-10 This embodiment is described as a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, and the diaphragms on both sides of the U-shaped diaphragm 1 are an integrated structure. Other methods are the same as the specific embodiment 1.

[0039] Specific implementation method six: Combination Figure 7-10 This embodiment is described as a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, and the positioning flange 2 is a rigid flange. Other methods are the same as those of the first embodiment.

[0040] Specific implementation method seven: Combination Figure 7-10 This embodiment is described. This embodiment is a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system. The outer ring of the U-shaped diaphragm 1 is matched with the outer ring of the positioning flange 2 in a radial stopper, the inner ring of the positioning flange 2 is matched with the fixed end of the positioning bolt 3 in a radial stopper, the positioning sleeve 7 is matched with the positioning bolt 3 in a radial stopper, and the inner ring cheek of the U-shaped diaphragm 1 is matched with the positioning sleeve 7 in a radial stopper. All are clearance matches. Other methods are the same as the second specific embodiment.

[0041] Specific implementation method eight: Combination Figure 7-10 This embodiment describes a single hinge point diaphragm coupling suitable for high-speed large compensation shaft system, wherein the positioning flange 2 and the main shaft, the U-shaped diaphragm 1 and the positioning flange 2, and the positioning flange 2 and the load end are all connected and fixed by flange connection. Other methods are the same as those of the second embodiment.

[0042] like Figure 7 As shown, the outer ring of the positioning flange 2 of the single-hinge point diaphragm coupling of the present application is connected to the output shaft of the main engine; the outer ring of the diaphragm on one side of the U-shaped diaphragm 1 is connected to the positioning flange 2; the outer ring on the other side of the U-shaped diaphragm 1 is connected to the transmission shaft; the inner ring of the positioning flange 2 is connected to the positioning bolt 3; the axial diameter of the positioning bolt 3 is sequentially installed with an axial adjustment pad 4, a positioning pad 5, a rubber pad 6, the inner ring cheek of the U-shaped diaphragm 1, another rubber pad 6, a positioning sleeve 7 and a nut 8 to axially lock the parts installed on the axial diameter of the positioning bolt 3. The U-shaped diaphragm 1 designs the inner rings of the two diaphragms into an integrated mechanism, and the positioning flange 2 connects the outer ring of the diaphragm on one side of the U-shaped diaphragm 1 with the inner ring in a radially rigid manner, which limits the bending freedom of the diaphragm, and only the diaphragm on the other side of the two diaphragms has bending freedom. Therefore, when the shaft system is subjected to dynamic analysis, the U-shaped diaphragm coupling can be simplified to a single-hinge point diaphragm structure.

[0043] like Figure 8 As shown in the figure, the two rubber pads 6 are respectively installed in the grooves of the positioning pad 5 and the positioning sleeve 7, and the inner thin cheek plate of the U-shaped diaphragm disc 1 is clamped by the two rubber pads 6. When the host starts working, due to factors such as thermal expansion of the shaft end, if the axial distance between the host end and the load end on both sides of the single hinge diaphragm disc coupling decreases, the distance a between the outer edges of the diaphragm disc at both ends of the U-shaped diaphragm disc 1 decreases, and the U-shaped diaphragm disc 1 occurs as follows Fig. 9 The compression deformation shown. At this time, the positioning flange 2 connected to the outer ring of the U-shaped diaphragm disk 1 moves to the left close to the main machine side, and the positioning bolts 3, axial adjustment pads 4, positioning pads 5 and two rubber pads 6 connected to the inner ring of the positioning flange 2 also move to the left close to the main machine side; while the position of the inner ring of the U-shaped diaphragm disk 1 relative to the main machine before starting remains unchanged, and the rubber pad 6 close to the side of the positioning flange 2 is compressed by the cheek plate of the inner ring of the U-shaped diaphragm disk 1. Similarly, after the main machine starts working, when the axial distance between the main machine end and the load end on both sides of the single-hinge diaphragm disk coupling increases, the distance a between the outer edges of the diaphragm disk at both ends of the U-shaped diaphragm disk 1 increases, and the U-shaped diaphragm disk 1 undergoes the following changes. Fig.10 The tensile deformation is shown. The positioning flange 2 connected to the outer ring of the U-shaped diaphragm disc 1 moves to the right close to the load side, and the positioning bolts 3, axial adjustment pads 4, positioning pads 5 and two rubber pads 6 connected to the inner ring of the positioning flange 2 also move to the right close to the load side; while the inner ring of the U-shaped diaphragm disc 1 remains in the same position relative to the main engine before startup, and the rubber pad 6 on the side away from the positioning flange 2 is compressed by the inner ring cheek plate of the U-shaped diaphragm disc 1. The rubber pad 6 has a certain inhibitory effect on the vibration of the unit.

[0044] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. A single hinge point diaphragm coupling suitable for high-speed and large compensation shafting, characterized by: It comprises a U-shaped diaphragm disc (1), a positioning flange (2) and a positioning bolt connector; Two single-hinge diaphragm couplings are symmetrically arranged at both ends of the transmission shaft. One side of the U-shaped diaphragm (1) on each single-hinge diaphragm coupling is connected to the transmission shaft, and the other side of the U-shaped diaphragm (1) on the single-hinge diaphragm coupling is connected to the positioning flange (2). The inner ring of the positioning flange (2) is installed with a positioning bolt connecting piece, and the positioning bolt connecting piece is connected to the inner ring cheek plate of the U-shaped diaphragm (1). The outer ring of the positioning flange (2) on one U-shaped diaphragm (1) is connected to the host end, and the outer ring of the positioning flange (2) on the other U-shaped diaphragm (1) is connected to the load end.

2. According to claim 1, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems is characterized by: The positioning bolt connection part comprises a positioning bolt (3), an axial adjustment pad (4), a positioning pad (5), a positioning sleeve (7), a nut (8) and two rubber pads (6); The fixed end of the positioning bolt (3) is connected to the inner ring of the positioning flange (2), and the axial adjustment pad (4), the positioning pad (5), a rubber pad (6), the inner ring cheek plate of the U-shaped diaphragm (1), another rubber pad (6), the positioning sleeve (7) and the nut (8) are sequentially mounted on the positioning bolt (3), and the nut (8) is threadedly connected to the positioning bolt (3).

3. According to claim 2, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems is characterized by: The diaphragm disc of the U-shaped diaphragm disc (1) is detachably connected to the positioning flange (2) via a plurality of bolts, and the plurality of bolts are evenly distributed along the radial direction.

4. According to claim 2, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems is characterized by: The fixed end of the positioning bolt (3) is detachably connected to the inner ring of the positioning flange (2) via a plurality of bolts, and the plurality of bolts are evenly distributed in the radial direction.

5. According to claim 1, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems is characterized by: The membrane discs on both sides of the U-shaped membrane disc (1) are an integrated structure.

6. According to claim 1, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shafting, characterized in that: The positioning flange (2) is a rigid flange.

7. According to claim 2, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems, characterized in that: The outer ring of the U-shaped diaphragm disc (1) is radially matched with the outer ring of the positioning flange (2) by a stopper, the inner ring of the positioning flange (2) is radially matched with the fixed end of the positioning bolt (3) by a stopper, the positioning sleeve (7) is radially matched with the positioning bolt (3) by a stopper, and the inner ring cheek plate of the U-shaped diaphragm disc (1) is radially matched with the positioning sleeve (7) by a stopper.

8. According to claim 2, a single hinge point diaphragm coupling suitable for high-speed and large-compensation shaft systems, characterized in that: The positioning flange (2) and the main machine shaft, the U-shaped diaphragm disc (1) and the positioning flange (2), and the positioning flange (2) and the load end are all connected and fixed by flange connection.

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