A thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower

Abstract

The present invention belongs to the technical field of high-speed centrifugal blowers, and discloses a thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower, which includes a support frame, a temperature control operating system, a first half shaft, a permanent magnet, a permanent magnet sheath, and a second half shaft. Fixed frames are rotatably connected to the left and right sides at the top of the support frame. A heat storage sleeve is inserted in the middle of the fixed frame. A heating coil is wrapped around the outer wall of the heat storage sleeve. A permanent magnet positioning sleeve is inserted at one end of the heat storage sleeve located at the positioning step. The present invention is reasonably designed, simple in structure and convenient to operate. By installing a heat storage sleeve between the heating coil and the heated part - the permanent magnet sheath, continuous heating can be achieved and a large amount of heat can be stored. During the assembly process, the temperature change is small, which can avoid the phenomenon that the heated part and the permanent magnet sheath shrink and cause the assembled parts to get stuck during the assembly process. At the same time, the heating waiting time can be shortened, and the assembly efficiency can be improved. The temperature can be monitored and adjusted in real time through the temperature control operating system, and the assembly success rate can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-speed centrifugal blowers, and specifically relates to a thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower. Background Art

[0002] The high-speed centrifugal blower adopts a direct drive structure of a high-speed permanent magnet motor, integrates the design of an efficient centrifugal impeller and motor drive, and is speed-regulated by a frequency converter. Its significant features of simple structure, integrated design, high efficiency, intelligence, simple operation and maintenance, and low energy consumption can be widely applied to industries such as sewage treatment, material conveying, food and medicine, textile printing and dyeing, leather and paper making, and iron and steel metallurgy.

[0003] The performance of the permanent magnet material of the rotor shaft in a high-speed permanent magnet motor determines the size and performance of the motor to a certain extent. The tensile strength of the commonly used high-performance permanent magnet materials in the design of high-speed permanent magnet motors is generally less than 80 MPa, which is far lower than its compressive strength (about 1000 MPa). Therefore, a high-strength protective sleeve needs to be applied outside the permanent magnet, and the two are in interference fit and thermally assembled to ensure that the permanent magnet is always under compressive stress, preventing it from being damaged by the centrifugal force generated by the rotor shaft itself during the high-speed operation of the motor and causing the motor to be scrapped. The commonly used rotor shaft structure is that the two half shafts at both ends are attached to the permanent magnet, and the permanent magnet sheath covers the above three to form a whole. To improve the strength of the rotor shaft, the two half shafts at both ends and the permanent magnet sheath are also in interference fit.

[0004] In the currently used thermal assembly process of the high-speed centrifugal rotor shaft, the heat of the heated component dissipates quickly, and assembly needs to be completed within a very short time. Otherwise, the heated part shrinks and the assembled components get stuck during assembly; due to heat conduction, the temperature of the heated part drops significantly after each component is assembled, and repeated heating is required, resulting in a long overall thermal assembly time of the rotor shaft; at the same time, there is no precise positioning and guidance, resulting in large assembly deviations and great assembly difficulty. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower, which is used to solve the problems in the existing thermal assembly process of the high-speed centrifugal rotor shaft, such as the assembled components are prone to getting stuck during assembly, repeated heating is required, the assembly time is long, the assembly deviation is large, and the assembly difficulty is great.

[0006] To achieve the above object, the present invention provides the following technical solution: A thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower, comprising a support frame, a temperature control operating system, a first half shaft, a permanent magnet, a permanent magnet sheath, and a second half shaft. The left and right sides at the top of the support frame are rotatably connected to fixed frames. A heat storage sleeve is inserted in the middle of the fixed frame. A heating coil is wrapped around the outer wall of the heat storage sleeve. A permanent magnet positioning sleeve is inserted at one end of the heat storage sleeve located at the positioning step. A half shaft guiding sleeve is inserted at the end of the heat storage sleeve away from the positioning step. A guiding inner hole of the half shaft guiding sleeve is provided in the middle of the half shaft guiding sleeve. The temperature control operating system is electrically connected to the heating coil through a wire harness. An inner hole of the heat storage sleeve is provided in the middle of the heat storage sleeve. A positioning step is fixedly installed at one end of the inner hole of the heat storage sleeve. A half shaft guiding inner hole of the heat storage sleeve is provided in the middle of the positioning step.

[0007] Preferably, outer cylindrical surfaces of the heat storage sleeve are provided at both ends of the heat storage sleeve. A first cylindrical surface is provided in the middle of the half shaft guiding sleeve. A second cylindrical surface is provided in the middle of the permanent magnet positioning sleeve. A first T-shaped groove and a second T-shaped groove are respectively provided at the cylindrical surfaces of the first cylindrical surface and the second cylindrical surface. A square protrusion is fixedly installed at one end of the outer cylindrical surface of the heat storage sleeve away from the center of the heat storage sleeve.

[0008] Preferably, a through hole of the permanent magnet positioning sleeve is provided in the middle of the permanent magnet positioning sleeve.

[0009] Preferably, a through hole is provided in the shaft of the fixed frame rotatably connected to the support frame. The temperature control operating system is connected to a temperature sensor through a wire harness. The wire harnesses on the temperature control operating system connected to the temperature sensor and the heating coil pass through the through hole. The heat storage sleeve can rotate on the support frame through the fixed frame by an angle greater than or equal to °.

[0010] Preferably, a spring pin is inserted into the right end of the support frame. Two symmetric pin holes are provided on the fixed frame. The spring pin is inserted into one of the pin holes. Through the cooperation of the spring pin and the pin hole, the rotatable heat storage sleeve can be fixed at the ° and ° positions with the axis perpendicular to the ground.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. The present invention is reasonably designed, simple in structure and convenient to operate. By adding a heat storage sleeve between the heating coil and the heated part - the permanent magnet sheath, continuous heating can be achieved and a large amount of heat can be stored. During the assembly process, the temperature change is small, which can avoid the phenomenon that the heated part and the permanent magnet sheath shrink and cause the assembled parts to get stuck during the assembly process. At the same time, the heating waiting time can be shortened, the assembly efficiency can be improved, and the temperature can be monitored and adjusted in real time through the temperature control operating system, thereby improving the assembly success rate.

[0013] 2. In the present invention, a quick-release positioning and guiding structure is adopted to ensure the assembly accuracy while reducing the assembly difficulty. The rotatable structure design enables each assembly process to be in a vertical state. After the assembled parts are aligned by the guiding structure and cooperate with the positioning structure, they can be assembled in place by relying on the action of gravity, further reducing the assembly difficulty and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded structural view of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0015] Figure 2 It is a sectional structural view of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0016] Figure 3 It is an overall schematic view of a half-shaft guiding sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0017] Figure 4 It is a sectional view of a half-shaft guiding sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the invention;

[0018] Figure 5 It is an overall schematic view of a heat storage sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0019] Figure 6 It is a sectional view of a heat storage sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0020] Figure 7 It is an overall schematic view of a permanent magnet positioning sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0021] Figure 8 It is a sectional view of a permanent magnet positioning sleeve structure of a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0022] Figure 9 It is a schematic view of a rotor shaft structure of a high-speed centrifugal blower mentioned in the present invention;

[0023] Figure 10 It is a schematic view after one end of the rotor shaft is assembled by a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention;

[0024] Figure 11 It is a schematic view after the entire rotor shaft is assembled by a thermal assembly tooling for a rotor shaft of a high-speed centrifugal blower according to the present invention.

[0025] In the figure: 1. Half shaft guide sleeve; 2. Heat storage sleeve; 3. Heating coil; 4. Fixed frame; 5. Spring bolt; 6. Permanent magnet positioning sleeve; 7. Support frame; 8. Temperature control operating system; 9. First half shaft; 10. Permanent magnet; 11. Permanent magnet sheath; 12. Second half shaft; 13. First T-shaped groove; 14. First cylindrical surface; 15. Guide inner hole of the half shaft guide sleeve; 16. Square protrusion; 17. Outer cylindrical surface of the heat storage sleeve; 18. Inner hole of the heat storage sleeve; 19. Positioning step; 20. Half shaft guide inner hole of the heat storage sleeve; 21. Second T-shaped groove; 22. Second cylindrical surface; 23. Through hole of the permanent magnet positioning sleeve. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] As Figures 1 to 11 shown, the embodiment of the present invention provides a hot assembly tooling for the rotor shaft of a high-speed centrifugal blower, including a support frame 7, a temperature control operating system 8, a first half shaft 9, a permanent magnet 10, a permanent magnet sheath 11, and a second half shaft 12. The left and right sides at the top of the support frame 7 are rotatably connected with a fixed frame 4. The middle of the fixed frame 4 is inserted with a heat storage sleeve 2. The outer wall of the heat storage sleeve 2 is wrapped with a heating coil 3. One end of the heat storage sleeve 2 located at the positioning step 19 is inserted with a permanent magnet positioning sleeve 6. One end of the heat storage sleeve 2 far from the positioning step 19 is inserted with a half shaft guide sleeve 1. The middle of the half shaft guide sleeve 1 is provided with a guide inner hole 15 of the half shaft guide sleeve. The temperature control operating system 8 is electrically connected with the heating coil 3 through a wire harness. The middle of the heat storage sleeve 2 is provided with an inner hole 18 of the heat storage sleeve. One end of the inner hole 18 of the heat storage sleeve is fixedly installed with a positioning step 19. The middle of the positioning step 19 is provided with a half shaft guide inner hole 20 of the heat storage sleeve;

[0028] The permanent magnet sheath 11 is placed in the inner hole 18 of the heat storage sleeve and positioned by the positioning step 19. The guide inner hole 15 of the half shaft guide sleeve can guide the assembly of the permanent magnet 10 and the second half shaft 12. The fixed frame 4 is fixed on both sides of the heat storage sleeve 2 and connects the heat storage sleeve 2 to the support frame 7. The permanent magnet sheath 11 is placed in the heat storage sleeve 2. While the heating coil 3 heats the heat storage sleeve 2, the temperature of the permanent magnet sheath 11 also rises.

[0029] Among them, both ends of the heat storage sleeve 2 are provided with the outer cylindrical surface 17 of the heat storage sleeve. The middle of the half-axis guide sleeve 1 is provided with a cylindrical surface one 14, and the middle of the permanent magnet positioning sleeve 6 is provided with a cylindrical surface two 22. A T-shaped groove one 13 and a T-shaped groove two 21 are respectively provided at the cylindrical surfaces of the cylindrical surface one 14 and the cylindrical surface two 22. A square protrusion 16 is fixedly installed at one end of the outer cylindrical surface 17 of the heat storage sleeve away from the center of the heat storage sleeve 2;

[0030] The permanent magnet positioning sleeve 6 and the half-axis guide sleeve 1 are respectively positioned with the outer cylindrical surface 17 of the heat storage sleeve through the cylindrical surface two 22 and the cylindrical surface one 14, and are fixed with the square protrusion 16 through the T-shaped groove one 13 and the T-shaped groove two 21, which can realize rapid positioning, disassembly and assembly, and improve the assembly efficiency.

[0031] Among them, a through hole 23 of the permanent magnet positioning sleeve is provided in the middle of the permanent magnet positioning sleeve 6;

[0032] The inner cavity of the permanent magnet sheath 11 is communicated with the atmosphere here. When the permanent magnet 10 is assembled, the air in the inner cavity of the permanent magnet sheath 11 will be pressed out through the through hole 23 of the permanent magnet positioning sleeve, so that the permanent magnet 10 can reach the assembly position smoothly and quickly, avoiding the problem that the permanent magnet 10 cannot be assembled in place due to the existence of compressed air to form a cavity.

[0033] Among them, a through hole is provided in the shaft of the fixed frame 4 that is rotatably connected to the support frame 7. The temperature control operating system 8 is connected with a temperature sensor through a wire harness. The wire harnesses on the temperature control operating system 8 that are connected to the temperature sensor and the heating coil 3 pass through the through hole. The heat storage sleeve 2 can rotate on the support frame 7 through the fixed frame 4 by an angle greater than or equal to 180°; A spring plug 5 is inserted into the right end of the support frame 7. Two symmetric pin holes are provided on the fixed frame 4. The spring plug 5 is inserted into one of the pin holes. Through the cooperation of the spring plug 5 and the pin hole, the rotatable heat storage sleeve 2 can be fixed at the 0° and 180° positions with the axis perpendicular to the ground.

[0034] Through the cooperation of the spring plug 5 and the small hole, the rotatable heat storage sleeve 2 can be fixed at the 0° and 180° positions with its axis perpendicular to the ground. When the permanent magnet 10, the half-axis one 9, and the half-axis two 12 are assembled, they are all in the vertical state. After being aligned by the guiding structure and cooperating with the positioning structure, they can be assembled in place by relying on the action of gravity, which can greatly reduce the assembly difficulty and improve the assembly efficiency.

[0035] The temperature control operating system 8 can display the temperature of the heat storage sleeve 2 to understand the temperature of the permanent magnet sheath 11 and master the assembly time. At the same time, the temperature control operating system 8 can set the heating temperature, can control the heating coil 3 to heat so that the temperature of the heat storage sleeve 2 reaches the set temperature and maintains the set temperature, and can set the heating temperature to meet the hot assembly requirements of rotator shafts with the same size but different interference amounts.

[0036] Working principle and usage process:

[0037] During use, adjust the tooling to make the half-shaft guide sleeve 1 vertically upward and insert the spring pin 5. Place the permanent magnet sheath 11 into the heat storage sleeve 2. At this time, the positioning step 19 on the heat storage sleeve 2 will stop the permanent magnet sheath 11. Operate the temperature control operating system 8 to heat the heat storage sleeve 2 and the permanent magnet sheath 11 through the heating coil 3. When the temperature reaches the set value, place the permanent magnet 10 into the guiding inner hole 15 of the half-shaft guide sleeve for alignment, and then let the permanent magnet 10 be installed into the permanent magnet sheath 11 by the action of gravity. At this time, the permanent magnet positioning sleeve 6 will stop the permanent magnet 10. Place the first half-shaft 9 into the guiding inner hole 15 of the half-shaft guide sleeve for alignment, and then let the first half-shaft 9 be installed into the permanent magnet sheath 11 to fit the permanent magnet 10 by the action of gravity. Pull out the spring pin 5, rotate the heat storage sleeve 2 to make the permanent magnet positioning sleeve 6 vertically upward and insert the spring pin 5. At this time, the rotor shaft is blocked by the half-shaft guide sleeve 1 and will not fall. Remove the permanent magnet positioning sleeve 6. Place the second half-shaft 12 into the half-shaft guiding inner hole 20 of the heat storage sleeve for alignment, and then let the second half-shaft 12 be installed into the permanent magnet sheath 11 to fit the permanent magnet 10 by the action of gravity. Pull out the spring pin 5, rotate the heat storage sleeve 2, remove the half-shaft guide sleeve 1, and the rotor shaft can be taken out to complete the assembly.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower, characterized in that: It includes a support frame (7), a temperature control operating system (8), a first half shaft (9), a permanent magnet (10), a permanent magnet sheath (11) and a second half shaft (12). On the left and right sides at the top of the support frame (7), fixed frames (4) are rotatably connected. A heat storage sleeve (2) is inserted in the middle of the fixed frame (4). A heating coil (3) is wrapped around the outer wall of the heat storage sleeve (2). At one end of the heat storage sleeve (2) located at the positioning step (19), a permanent magnet positioning sleeve (6) is inserted. At the end of the heat storage sleeve (2) away from the positioning step (19), a half shaft guide sleeve (1) is inserted. In the middle of the half shaft guide sleeve (1), a guide inner hole (15) of the half shaft guide sleeve is provided. The temperature control operating system (8) is electrically connected to the heating coil (3) through a wire harness. In the middle of the heat storage sleeve (2), an inner hole (18) of the heat storage sleeve is provided. At one end of the inner hole (18) of the heat storage sleeve, a positioning step (19) is fixedly installed. In the middle of the positioning step (19), a half shaft guide inner hole (20) of the heat storage sleeve is provided.

2. The hot assembly tooling for the rotor shaft of a high-speed centrifugal blower according to claim 1, characterized in that: At both ends of the heat storage sleeve (2), outer cylindrical surfaces (17) of the heat storage sleeve are provided. In the middle of the half shaft guide sleeve (1), a first cylindrical surface (14) is provided. In the middle of the permanent magnet positioning sleeve (6), a second cylindrical surface (22) is provided. T-shaped grooves one (13) and two (21) are respectively provided at the cylindrical surfaces of the first cylindrical surface (14) and the second cylindrical surface (22). At one end of the outer cylindrical surface (17) of the heat storage sleeve away from the center of the heat storage sleeve (2), a square protrusion (16) is fixedly installed.

3. The hot assembly tooling for the rotor shaft of a high-speed centrifugal blower according to claim 1, characterized in that: In the middle of the permanent magnet positioning sleeve (6), a through hole (23) of the permanent magnet positioning sleeve is provided.

4. A thermal assembly tooling for the rotor shaft of a high-speed centrifugal blower according to claim 1, characterized in that: A through hole is provided in the shaft of the fixed frame (4) rotatably connected to the support frame (7). The temperature control operating system (8) is connected to a temperature sensor through a wire harness. The wire harness on the temperature control operating system (8) connected to the temperature sensor and the heating coil (3) passes through the through hole. The heat storage sleeve (2) can rotate on the support frame (7) by an angle greater than or equal to 180° through the fixed frame (4).

5. A hot assembly tooling for the rotor shaft of a high-speed centrifugal blower according to claim 1, characterized in that: A spring latch (5) is inserted into the right end of the support frame (7). Two symmetric pin holes are provided on the fixed frame (4). The spring latch (5) is inserted into one of the pin holes. Through the cooperation of the spring latch (5) and the pin hole, the rotatable heat storage sleeve (2) can be fixed at the 0° and 180° positions with the axis perpendicular to the ground.

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