Shell component of disc type eddy current brake and mounting method of shell component

Abstract

According to the disc type electric eddy current brake shell component and the installation method thereof, a middle ring is arranged between a floating end eddy current outer ring and a fixed end eddy current outer ring, and a floating end eddy current inner ring is arranged on the inner sides of the floating end eddy current outer ring and the fixed end eddy current outer ring and connected and fixed through three sets of screw assemblies; the three sets of screw assemblies are sequentially arranged in parallel in the thickness direction of the floating end vortex inner ring and close to the periphery of the shaft, the diameter and the outer diameter of an inner hole of the floating end vortex outer ring are coaxial with the diameter and the outer diameter of an inner hole of the fixed end vortex outer ring, and a floating end half shaft is arranged in an inner hole of the floating end vortex outer ring in a sleeved mode. A fixed end half shaft is arranged in an inner hole of the fixed end vortex outer ring in a sleeved mode, the outer circle of the swing bearing is connected with a supporting frame, and the supporting frame is fixed to the installation base through screws and pins. Parts required for assembly are directly machined to the final size and assembled on a final product at a time, the end sleeve and the outer ring are designed into one part, and the product with the structural design is adopted, so that the manufacturing period of the product is shortened, and the manufacturing cost and the assembly difficulty are reduced.

Description

Technical Field

[0001] The invention belongs to the field of eddy current brakes, and in particular relates to a disc type eddy current brake housing component and a mounting method thereof. Background Art

[0002] The technology of eddy current dynamometer originated in Germany, and the domestic technology was introduced from Germany in the 1970s and 1980s. It is a non-contact detection equipment that works on the principle of electromagnetic induction. It is mainly used to detect the power performance speed, torque and power of rotating equipment such as diesel engines, gasoline engines, motors, gearboxes, etc., and is widely used in engine and motor testing. Due to the advantages of eddy current dynamometer such as stable operation and convenient automatic control, the market demand for high-power disc eddy current has gradually increased in the past two years. The main domestic manufacturers of disc eddy current dynamometers are Kaimai (Luoyang) Electromechanical Company, Hunan Xiangyi Company, etc. The main foreign manufacturers of disc eddy current dynamometers are AVL Company of Austria, Shanghai Zerner Company, etc.

[0003] According to the appearance and structure, eddy current dynamometers are usually divided into drum structures (large axial dimensions and small radial dimensions) and disc structures (small axial dimensions and large radial dimensions). Generally, drum structures are used for small and medium-power models, and disc structures are used for medium and large-power models. Their components are basically the same, including eddy current brakes, force measuring components, speed measuring components, cooling systems, and calibration devices. The eddy current brake is the most core component, mainly composed of brake housing components and rotor components. The eddy current brake housing components are crucial to the product's performance, manufacturing cost, manufacturing cycle, reliability and maintainability, so its structural design method is also constantly being studied and optimized. The commonly used eddy current brake housing component structural design has two characteristics: First, multiple assembly and multiple processing, the manufacturing process is complicated and the cycle is long. It is impossible to replace damaged parts separately during use. The components (eddy current ring components) are assembled and processed, and the positioning pin holes are made and the positioning pins are installed. Then, the housing components are assembled and processed again. During the final assembly, the housing components need to be disassembled and assembled step by step; Second, the eddy current ring component is composed of three main parts: the end sleeve, the outer ring and the inner ring. The materials and blank processing methods of the end sleeve and the outer ring are different (the end sleeve is a casting and the outer ring is a forging), and the processing and assembly are very complicated. Summary of the invention

[0004] In order to overcome the above disadvantages, the present invention provides a disc eddy current brake housing component and a mounting method thereof.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A disc eddy current brake housing component comprises a fixed end eddy current outer ring, an eddy current inner ring, a floating end eddy current outer ring, an intermediate ring, an excitation coil and a floating end eddy current outer ring, wherein the intermediate ring is arranged between the floating end eddy current outer ring and the fixed end eddy current outer ring and is positioned by a stopper, the intermediate ring and the floating end eddy current outer ring and the fixed end eddy current outer ring are connected and fixed by connecting pieces, the eddy current inner ring is arranged on the inner side of the floating end eddy current outer ring and the fixed end eddy current outer ring and is connected and fixed by three sets of screw assemblies, the three sets of screw assemblies are respectively arranged in parallel in the thickness direction of the eddy current inner ring and close to the outer circumference of the shaft, and each set of screw assemblies is a plurality of screws evenly distributed; The inner hole diameter and outer diameter of the floating end vortex outer ring are coaxial with the inner hole diameter and outer diameter of the fixed end vortex outer ring. A floating end half-shaft is sleeved in the inner hole of the floating end vortex outer ring, and is installed by means of a floating end sleeve cup and a floating end high-speed bearing. A fixed end half-shaft is sleeved in the inner hole of the fixed end vortex outer ring, and is installed by means of a fixed end sleeve cup and a fixed end high-speed bearing. The outer circle of the swing bearing is connected to a support frame, and the support frame is fixed to the mounting base by screws and pins.

[0006] Further optimization is that a liner ring is installed in the external area between the vortex inner rings, and the inner hole of the liner ring and the floating end vortex outer ring and the fixed end vortex outer ring are connected by a stop interference fit, and the fitting grade is H7 / k6.

[0007] Further optimization is that the excitation coil is installed in a cavity formed by the middle ring, the floating end eddy current outer ring and the fixed end eddy current outer ring, and there is a gap between the end face or side face of the excitation coil and the floating end eddy current outer ring and the fixed end eddy current outer ring, and a rubber plate and a rubber rope for fixing the coil are installed in the gap.

[0008] Further optimized, the connecting piece includes a double-headed screw, a nut and a washer. Further optimization, the coaxiality grade of the inner hole of the fixed-end eddy current outer ring and the outer circle of the swing bearing, as well as the verticality grade of the step surface and the end face are IT6 or IT7, the verticality grade of the joint surface with the intermediate ring is IT6 or IT7, the verticality grade of the joint surface with the eddy current inner ring is IT6 or IT7, the coaxiality grade of the stop diameter matching with the excitation coil is IT9 or IT10, and the verticality of the end face combined with the excitation coil is IT10 or IT12.

[0009] Further optimization is that the diameter of the stop circular surface of the floating end vortex outer ring and the inner hole of the middle ring, the diameter of the circular surface of the floating end vortex outer ring and the floating end bearing sleeve, and the diameter of the circular surface of the floating end vortex outer ring and the inner hole of the swing bearing are coaxial, and the diameter of the stop of the fixed end vortex outer ring and the middle ring, the inner hole diameter of the fixed end vortex outer ring, and the outer circle diameter of the swing bearing are coaxial, and the coaxiality of the above two groups is the same.

[0010] Further optimization is that the verticality between the stop end face of the floating end vortex outer ring and the middle ring, the fitting surface between the floating end vortex outer ring and the end face of the swing bearing, the fitting surface between the floating end vortex outer ring and the floating end bearing sleeve and the circular surface diameter of the floating end vortex outer ring and the floating end bearing sleeve is the same as the verticality between the stop circular surface of the floating end vortex outer ring and the middle ring, the fitting surface between the floating end vortex outer ring and the end face of the swing bearing, the fitting surface between the floating end vortex outer ring and the floating end bearing sleeve and the plane of the inner hole diameter of the fixed end vortex outer ring.

[0011] A method for installing a disc eddy current brake housing component, the specific steps are: S1. Assembling the floating end vortex outer ring, the fixed end vortex outer ring and the vortex inner ring into a floating end vortex ring component and a fixed end vortex ring component; S2. Place the outer end surface of the floating end eddy current ring component against the fixture bracket, and install the liner ring, excitation coil, and intermediate ring in sequence; S3. Install the fixed end swirl ring components.

[0012] The beneficial effects of the present invention are: The parts required for assembly of the present invention are directly processed to the final size and assembled to the final product at one time, and the end sleeve and the outer ring are designed as one part. Products using this structural design can significantly shorten the manufacturing cycle of the product, reduce manufacturing costs, reduce assembly difficulty, and directly replace damaged eddy current inner and outer rings, thereby improving the maintainability of the product, having good interchangeability, and can be mass-produced, with good engineering value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the housing components of the eddy current brake; Figure 2 It is a schematic diagram of the structure of the fixed end vortex outer ring; Figure 3 It is a structural schematic diagram of the outer ring of the floating end vortex; Figure 4 It is a structural schematic diagram of the fixed end vortex ring component; Figure 5 It is a schematic diagram of the structure of the floating end vortex ring component; Figure 6 Schematic diagram of the installation and connection of the eddy current brake housing components; Figure numerals: 1, floating end eddy current outer ring, 2, eddy current inner ring, 3, excitation coil, 4, intermediate ring, 5, double-headed screw, 6, bushing ring, 7, screw assembly, 8, fixed end eddy current outer ring, 9, mounting base, 10, support frame, 11, floating end high-speed bearing, 12, swing bearing, 13, floating end half shaft, 14, fixed end half shaft, 15, fixed end high-speed bearing, 16, floating end sleeve cup, 17, fixed end sleeve cup, 18, screw, 19, pin, 20, sealing ring, B1-1, the stop end face of the fixed end vortex outer ring and the middle ring, B1-2, the stop end face of the floating end vortex outer ring and the middle ring, B4-1, the fitting surface of the fixed end vortex outer ring and the swing bearing end face, B4-2, the fitting surface of the floating end vortex outer ring and the swing bearing end face, B5-1, the fitting surface between the fixed end vortex outer ring and the fixed end bearing sleeve cup, B5-2, the fitting surface between the floating end vortex outer ring and the floating end bearing sleeve cup, D1- 1. The stop diameter of the fixed end vortex outer ring and the middle ring, D1-2, the stop circular surface diameter of the floating end vortex outer ring and the inner hole of the middle ring, D4-1, the circular surface diameter of the fixed end vortex outer ring and the fixed end bearing sleeve, D4-2, the circular surface diameter of the floating end vortex outer ring and the floating end bearing sleeve, D5-1, the outer circle diameter of the fixed end vortex outer ring and the swing bearing, D5-2, the outer circle diameter of the floating end vortex outer ring and the inner hole of the swing bearing. DETAILED DESCRIPTION

[0014] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is described in detail below in conjunction with specific embodiments. The following embodiments are implemented based on the technical solutions of the present invention, and detailed implementation methods and specific operating procedures are given. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the following embodiments.

[0015] A disc eddy current brake housing component and an installation method thereof, comprising a fixed end eddy current outer ring 8, a floating end eddy current outer ring 1, an eddy current inner ring 2, an intermediate ring 4, an excitation coil 3 and a floating end eddy current outer ring 1, the inner side of the floating end eddy current outer ring 1 and the inner side of the fixed end eddy current outer ring 8 are both provided with an eddy current inner ring 2, the excitation coil 3 is installed in a cavity formed by the intermediate ring 4, the floating end eddy current outer ring 1 and the fixed end eddy current outer ring 8, the inner hole of the excitation coil 3 and the floating end eddy current outer ring 1, The fixed-end eddy current outer ring 8 is a clearance fit, and the fit type is H11 / c11. There is a 2-4mm gap between the side of the excitation coil 3 and the fixed-end eddy current outer ring 8 and the eddy current inner ring 2. A non-metallic plate or rubber rope 20 with good elasticity and temperature resistance of >120°C is installed in the gap. When the intermediate ring, the floating-end eddy current outer ring 1 and the fixed-end eddy current outer ring 8 are fixed with double-headed screws and nuts, the excitation coil 3 is immediately fixed, which limits the rotation and movement of the excitation coil 3. A liner ring 6 is installed in the outer area between the floating end vortex outer ring 1 and the vortex inner ring 2 on the inner side of the fixed end vortex outer ring 8. The inner hole of the liner ring 6 and the floating end vortex outer ring 1 and the fixed end vortex outer ring 8 are connected by a stop interference fit, and the fit is H7 / k6. The intermediate ring 4 is arranged between the floating end vortex outer ring 1 and the fixed end vortex outer ring 8 and is positioned by the stop. The intermediate ring 4 and the floating end vortex outer ring 1 and the fixed end vortex outer ring 8 are connected and fixed by connecting parts, and the connecting parts include a double-headed screw 5, a nut and a gasket.

[0016] The two eddy current inner rings 2 are connected and fixed by three groups of screw assemblies 7. The three groups of screw assemblies 7 are respectively arranged in parallel along the thickness direction of the eddy current inner ring 2 and close to the outer circumference of the shaft. Each group of screw assemblies 7 is a plurality of evenly distributed screws, and the plurality of screws are evenly arranged on the circumference. A group of screw assemblies in the middle position can effectively reduce the inward deformation of the eddy current inner ring 2, prevent the reduction of the gap or contact between the eddy current inner ring 2 and the rotor disk, thereby improving the reliability of the product and extending the service life of the product.

[0017] The inner hole diameter and outer diameter of the floating end vortex outer ring 1 are coaxial with the inner hole diameter and outer diameter of the fixed end vortex outer ring 8. A floating end half-shaft 13 is sleeved in the inner hole of the floating end vortex outer ring 1, and is installed by means of a floating end sleeve cup 16 and a floating end high-speed bearing 11. A fixed end half-shaft 14 is sleeved in the inner hole of the fixed end vortex outer ring 8, and is installed by means of a fixed end sleeve cup 17 and a fixed end high-speed bearing 15. The outer circle of the swing bearing 12 is connected to a support frame 10, and the support frame 10 is fixed to the mounting base 9 by bolts 18 and pins 19.

[0018] The coaxiality of the outer circle of the fixed end eddy current outer ring 8 and the outer circle of the swing bearing 12, as well as the verticality of the step surface and the end surface are all IT6 or IT7, the verticality of the joint surface with the intermediate ring 4 is IT6 or IT7, the verticality of the joint surface with the eddy current inner ring 2 is IT6 or IT7, the coaxiality of the stop diameter with the excitation coil 3 is IT9 or IT10, and the verticality of the end surface with the excitation coil 3 is IT10 or IT12. The stop diameter D1-2 of the end vortex outer ring 8 and the inner hole of the middle ring 4, the circular surface diameter D4-2 of the floating end vortex outer ring 1 and the floating end bearing sleeve 16, and the circular surface diameter D5-2 of the floating end vortex outer ring 1 and the inner hole of the swing bearing 12 are coaxial, and the stop diameter D1-1 of the fixed outer ring 8 and the middle ring 4, the inner hole diameter D4-1 of the fixed end vortex outer ring 8, and the outer circle diameter D5-1 of the swing bearing 12 of the fixed vortex outer ring are coaxial, and the coaxiality of the above two groups is the same.

[0019] The verticality between the stop end face B1-2 between the floating end vortex outer ring 1 and the middle ring 4, the fitting surface B4-2 between the floating end vortex outer ring 1 and the end face of the swing bearing 12, the fitting surface B5-2 between the floating end vortex outer ring 1 and the floating end bearing sleeve 5, and the circular surface diameter D4-2 between the floating end vortex outer ring 1 and the floating end bearing sleeve 16 is the same as the verticality between the stop end face B1-1 between the fixed end vortex outer ring 8 and the middle ring 4, the fitting surface B4-1 between the floating end vortex outer ring 1 and the end face of the swing bearing 12, the fitting surface B5-1 between the floating end vortex outer ring 1 and the floating end bearing sleeve 16, and the plane of the inner hole diameter D4-1 of the fixed end vortex outer ring 8.

[0020] A method for installing a disc eddy current brake housing component, the specific steps are: S1. The floating end vortex outer ring 1, the fixed end vortex outer ring 8 and the vortex inner ring 2 are assembled into a floating end vortex ring component and a fixed end vortex ring component; S2. The outer end surface of the floating end eddy current ring component is supported on the fixture bracket, and the liner ring 6, the excitation coil 3, and the intermediate ring 4 are installed in sequence; S3. Install the fixed end vortex ring components, end bearing cup, high-speed bearing and other parts.

[0021] The invention discloses a method for installing a disc type eddy current brake shell component. After installation, the inner hole and outer circle of one end of the eddy current brake shell component are coaxial with the inner hole and outer circle of the other end.

[0022] In the present invention, the outer ring and the middle ring are made of common metal materials, and the material preparation is convenient. The blanks are all castings, which can be realized by general casting methods such as sand casting. The main dimensions can be processed on a vertical lathe, and assembly basically does not require special tooling. It can be realized by using general tools such as support frames, cranes, torque wrenches, etc. There are no special requirements for the skills of the installation workers. Workers with medium skill levels can complete the assembly, and it is simple and convenient to replace spare parts during use. The shell component has the characteristics of simple processing, easy installation, and easy maintenance. The eddy current outer ring is one of the main parts of the product. It is directly processed to the final size and does not need to be processed after assembly, which significantly shortens the manufacturing cycle and manufacturing cost. At present, shell components of this structure have been used on multiple models of products.

[0023] The above shows and describes the main features, methods of use, basic principles and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A disc eddy current brake housing component, comprising a fixed end eddy current outer ring (8), a floating end eddy current outer ring (1), an eddy current inner ring (2), an intermediate ring (4), an excitation coil (3) and a floating end eddy current outer ring (1), characterized in that: The intermediate ring (4) is arranged between the floating end vortex outer ring (1) and the fixed end vortex outer ring (8), and is positioned by a stopper; the intermediate ring (4) and the floating end vortex outer ring (1) and the fixed end vortex outer ring (8) are connected and fixed by connecting pieces; the vortex inner ring (2) is arranged on the inner side of the floating end vortex outer ring (1) and the fixed end vortex outer ring (8), and is connected and fixed by three sets of screw assemblies (7); the three sets of screw assemblies (7) are respectively arranged in parallel in a thickness direction of the vortex inner ring (2) and close to the outer circumference of the shaft, and each set of screw assemblies (7) comprises a plurality of screws evenly distributed; The inner hole diameter and outer diameter of the floating end vortex outer ring (1) are coaxial with the inner hole diameter and outer diameter of the fixed end vortex outer ring (8); a floating end half shaft (13) is sleeved in the inner hole of the floating end vortex outer ring (1), and is installed by means of a floating end sleeve cup (16) and a floating end high-speed bearing (11); a fixed end half shaft (14) is sleeved in the inner hole of the fixed end vortex outer ring (8), and is installed by means of a fixed end sleeve cup (17) and a fixed end high-speed bearing (15); the outer circle of the swing bearing (12) is connected to a support frame (10), and the support frame (10) is fixed to the installation base (9) by means of screws (18) and pins (19).

2. A disc eddy current brake housing component according to claim 1, characterized in that: A liner ring (6) is installed in the outer area between the vortex inner rings (2), and the inner hole of the liner ring (6) and the floating end vortex outer ring (1) and the fixed end vortex outer ring (8) are connected by means of a stopper interference fit, with a fit of H7 / k6.

3. A disc eddy current brake housing component according to claim 1, characterized in that: The excitation coil (3) is installed in a cavity formed by the intermediate ring (4), the floating end eddy current outer ring (1) and the fixed end eddy current outer ring (8), and there is a gap between the end face or side face of the excitation coil (3) and the floating end eddy current outer ring (1) and the fixed end eddy current outer ring (8), and a rubber plate and a rubber rope for fixing the coil are installed in the gap.

4. A disc eddy current brake housing component according to claim 1, characterized in that: The connecting piece comprises a double-headed screw (5), a nut and a washer.

5. A disc eddy current brake housing component according to claim 1, characterized in that: The coaxiality of the inner hole of the fixed end eddy current outer ring (8) and the outer circle of the swing bearing (12) as well as the verticality of the step surface and the end surface are all IT6 or IT7, the verticality of the joint surface with the intermediate ring (4) is IT6 or IT7, the verticality of the joint surface with the eddy current inner ring (2) is IT6 or IT7, the coaxiality of the stop diameter with the excitation coil (3) is IT9 or IT10, and the verticality of the end surface with the excitation coil (3) is IT10 or IT11.

6. A disc eddy current brake housing component according to claim 1, characterized in that: The stop diameter (D1-2) of the floating end vortex outer ring (1) and the inner hole of the intermediate ring (4), the round surface diameter (D4-2) of the floating end vortex outer ring (1) and the floating end bearing sleeve (16), and the round surface diameter (D5-2) of the floating end vortex outer ring (1) and the inner hole of the swing bearing (12) are coaxial, and the stop diameter (D1-1) of the fixed end vortex outer ring (8) and the intermediate ring (4), the inner hole diameter (D4-1) of the fixed end vortex outer ring (8), and the outer circle diameter (D5-1) of the swing bearing (12) are coaxial, and the coaxiality of the above two groups is the same.

7. A disc eddy current brake housing component according to claim 1, characterized in that: The perpendicularity between the stop end face (B1-2) between the floating end vortex outer ring (1) and the intermediate ring (4), the fitting face (B4-2) between the floating end vortex outer ring (1) and the end face of the swing bearing (12), the fitting face (B5-2) between the floating end vortex outer ring (1) and the floating end bearing sleeve (5), and the circular surface diameter (D4-2) between the floating end vortex outer ring (1) and the floating end bearing sleeve (16) is the same as the perpendicularity between the stop circular face (B1-1) between the floating end vortex outer ring (1) and the intermediate ring (4), the fitting face (B4-1) between the floating end vortex outer ring (1) and the end face of the swing bearing (12), the fitting face (B5-1) between the floating end vortex outer ring (1) and the floating end bearing sleeve (16), and the plane of the inner hole diameter D4-1 of the fixed end vortex outer ring (8).

8. The method for installing a housing component of a disc eddy current brake according to claim 1, characterized in that: The specific steps are: S1. Assembling the floating end vortex outer ring (1), the fixed end vortex outer ring (8) and the vortex inner ring (2) into a floating end vortex ring component and a fixed end vortex ring component; S2. The outer end surface of the floating end eddy current ring component or the fixed end eddy current ring component is supported on the fixture bracket, and the liner ring (6), the excitation coil (3), and the intermediate ring (4) are installed in sequence; S3. Install the fixed end swirl ring components.

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