Forcing device for rotating shaft system

Abstract

The invention provides a forcing device for a rotating shaft system. The forcing device comprises a supporting unit and an axial force loading unit. The supporting unit comprises a portal frame and a bearing sleeve unit. The bearing sleeve unit comprises a bearing sleeve and two double-row angular contact ball bearings. The axial force loading unit comprises an axial loading sleeve, a small round nut, a variable-pitch compression spring, an axial force sensor and a buffer sleeve, the axial force sensor abuts against the side face of the bearing sleeve unit, the buffer sleeve is connected with the other face of the axial force sensor, and the variable-pitch compression spring is arranged on the buffer sleeve in a sleeving mode; the axial loading sleeve is connected with the portal frame through a small round nut and abuts against one end of the variable-pitch compression spring. And the displacement direction of the axial force loading unit is parallel to the rotating shaft system. Through the combination of the buffer sleeve and the variable-pitch compression spring, the axial force is uniformly and gently applied to the loading shaft, and the application of the axial force is precisely regulated and controlled.

Description

Technical Field

[0001] The present application belongs to the field of rotating shaft systems, and specifically relates to a force-adding device for a rotating shaft system. Background Art

[0002] There are high-speed rotating shafts and bearings in the rotating shaft system. The force on the shaft system has a great impact on the smoothness of operation, service life and other performance of the rotating shaft system and even the entire mechanical transmission system. There are certain difficulties in applying axial force to the rotating shaft system, and it is necessary to ensure that there are no other interfering forces. Therefore, how to accurately control the application of axial force has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of this, an embodiment of the present application is directed to providing a force-adding device for a rotating shaft system, which solves the technical problem of how to accurately control the application of axial force existing in the prior art through the structural design of the axial loading unit.

[0004] The present application provides a force-adding device for a rotating shaft system, which includes a support unit, a radial loading unit, and an axial loading unit. The support unit includes a gantry and a bearing sleeve unit. The bearing sleeve unit includes a bearing sleeve and two double-row angular contact ball bearings, and the double-row angular contact ball bearings are installed in the bearing sleeve. The loading shaft is connected to the bearing sleeve through two double-row angular contact ball bearings. The axial force loading unit includes an axial loading sleeve, a small round nut, a variable pitch compression spring, an axial force sensor and a buffer sleeve, the axial force sensor is close to the side of the bearing sleeve unit, the buffer sleeve is connected to the other side of the axial force sensor, the variable pitch compression spring is sleeved on the buffer sleeve, the axial loading sleeve is connected to the gantry through the small round nut, and the axial loading sleeve is pressed against one end of the variable pitch compression spring. The displacement direction of the axial force loading unit is parallel to the rotating shaft system. When the axial force is loaded, the axial loading sleeve is rotated to support the variable pitch compression spring. The other end of the variable pitch compression spring pushes the buffer sleeve and the axial force sensor. The axial force sensor transmits the loading force to the bearing sleeve, and the bearing sleeve transmits the loading force to the two double-row angular contact ball bearings, and finally transmits it to the loading shaft through the double-row angular contact ball bearings.

[0005] In a specific embodiment of the present application, the support unit further comprises a V-shaped block and an axial movement retaining mechanism. The bearing sleeve unit is placed on the axial movement retaining mechanism and is located above the V-shaped block. The V-shaped block has a flat bottom and a protruding V-shaped portion, and the axial movement retaining mechanism is installed in the V-shaped surface of the V-shaped portion of the V-shaped block.

[0006] In a specific embodiment of the present application, the axial motion retaining mechanism adopts a plane bearing, and the plane bearing is installed in a V-block.

[0007] In a specific embodiment of the present application, the bearing sleeve unit further includes a left end cover of the bearing sleeve and a right end cover of the bearing sleeve, and the left end cover of the bearing sleeve and the right end cover of the bearing sleeve are installed at both ends of the bearing sleeve.

[0008] In a specific embodiment of the present application, the force-adding device for the rotating shaft system also includes a radial force loading unit. The support unit also includes a bearing platform and a V-block. The radial force loading unit includes a jack, a radial support plate, a radial force sensor, a butterfly spring and a stud. The jack is installed on the bearing platform of the support unit, the radial support plate is placed above the jack, the radial force sensor is installed on the upper surface of the radial support plate, the butterfly spring is installed on the radial force sensor, the stud passes through the radial force sensor and the butterfly spring, and one end of the stud is connected to the radial support plate. The other end of the stud is connected to the lower surface of the V-block.

[0009] In a specific embodiment of the present application, the support unit further includes a base, a vertical motion holding mechanism and a guide column. The gantry stands on the base, the bearing platform is placed flat on the base, the guide column stands on the bearing platform, and the guide column passes through the vertical motion holding mechanism; the vertical motion holding mechanism is installed on the V-block.

[0010] In a specific embodiment of the present application, the lower parts of the four guide pillars are connected to the first step hole, the second step hole, the third step hole and the fourth step hole of the bearing stand. The four guide pillars pass through the vertical motion holding mechanism. The bottom of the V-block plane has four holes for installing the vertical motion holding mechanism.

[0011] In a specific implementation of the present application, the jack is a hydraulic jack.

[0012] In a specific embodiment of the present application, the vertical motion holding mechanism is composed of a guide sleeve and a guide column.

[0013] In a specific implementation of the present application, both the radial force sensor and the axial force sensor are annular force sensors.

[0014] The beneficial effect of the technical solution of the present application is that when the axial force is applied, the combination of the buffer sleeve and the variable pitch compression spring enables the axial force to be applied to the loading shaft evenly and smoothly, playing a compensatory role and avoiding unnecessary friction resistance. In addition, because the displacement direction of the axial force loading unit is parallel to the rotating shaft system, and the axial and radial loading mechanisms are simple, the entire force-adding device does not require much installation space, especially when the installation space is limited, it has its unique advantages. In addition, the force-adding device for the rotating shaft system has a simple structure, a small required installation space, an adjustable load application range, and high loading accuracy. It is an economical and efficient rotating shaft system force-adding solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is an axonometric view of a force-adding device for a rotating shaft system provided in one embodiment of the present application.

[0016] Figure 2 Shown Figure 1 A side view of a force applying device for a rotating shaft system according to the illustrated embodiment.

[0017] Figure 3 Shown Figure 1 A top view of a force application device for a rotating shaft system according to the illustrated embodiment.

[0018] Figure 4 Shown Figure 1 The illustrated embodiment is a schematic diagram of the upper portion of a V-block in a force-applying device for a rotating shaft system.

[0019] Figure 5 Shown Figure 4 Front view of the V-block in the illustrated embodiment.

[0020] Figure 6 Shown Figure 5 Side view of a V-block in the illustrated embodiment.

[0021] Figure 7 Shown is a schematic diagram of an axial force loading unit in a force-adding device for a rotating shaft system provided in one embodiment of the present application.

[0022] Figure 8 Shown is a schematic diagram of a bearing sleeve unit in a force-increasing device for a rotating shaft system provided in one embodiment of the present application.

[0023] Fig. 9 Shown Figure 8 AA sectional view of the bearing sleeve unit in the illustrated embodiment.

[0024] Fig.10 Shown is a schematic diagram of a radial support plate in a force-adding device for a rotating shaft system provided in one embodiment of the present application.

[0025] Fig.11 Shown Fig.10 A cross-sectional view of the radial support plate along the plane BB in the illustrated embodiment.

[0026] Fig.12 Shown is a partial cross-sectional view of a bearing stand in a force-increasing device for a rotating shaft system provided in one embodiment of the present application.

[0027] Fig.13 Shown Fig.12 A top view of the bearing stand in the illustrated embodiment.

[0028] Fig.14Shown is a schematic diagram of a base in a force-adding device for a rotating shaft system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] At least one embodiment of the present application provides a force-adding device for a rotating shaft system, referring to Figures 1 to 14 The force adding device for the rotating shaft system includes a support unit, a radial loading unit, and an axial loading unit. The support unit includes a gantry 9 and a bearing sleeve unit 14. The bearing sleeve unit 14 includes a bearing sleeve 142 and two double-row angular contact ball bearings 143, and the double-row angular contact ball bearings 143 are installed in the bearing sleeve 142. The loading shaft is connected to the bearing sleeve 142 through the two double-row angular contact ball bearings 143.

[0031] The axial force loading unit includes an axial loading sleeve 10, a small round nut 11, a variable pitch compression spring 12, an axial force sensor 13 and a buffer sleeve 15. The axial force sensor 13 is close to the side of the bearing sleeve unit 14, and the buffer sleeve 15 is connected to the other side of the axial force sensor 13. The variable pitch compression spring 12 is sleeved on the buffer sleeve 15. The axial loading sleeve 10 is connected to the gantry 9 through the small round nut 11, and the axial loading sleeve 10 is pressed against one end of the variable pitch compression spring 12. The displacement direction of the axial force loading unit is parallel to the rotating shaft system.

[0032] When the axial force is loaded, the axial loading sleeve 10 is rotated to support the variable pitch compression spring 12. The other end of the variable pitch compression spring 12 pushes the buffer sleeve 15 and the axial force sensor 13. The axial force sensor 13 transmits the loading force to the bearing sleeve 142. The bearing sleeve 142 transmits the loading force to the two double-row angular contact ball bearings 143, and finally transmits the loading force to the loading shaft through the double-row angular contact ball bearings 143.

[0033] It should be noted that, as required, the two double-row angular contact ball bearings 143 can be installed face to face or back to back. The axial force loading unit is a rotating feed mechanism. The axial loading sleeve 10 adopts an axially penetrating bolt. The axial loading sleeve 10 has threads on it and is connected to the gantry 9 through a small round nut 11. The variable pitch compression spring 12 is sleeved on the buffer sleeve 15 to transmit the axial loading force. As required, the diameter of the axial loading sleeve 10 and the pitch of the threads on it can also be designed to control the distance of the axial loading sleeve 10 rotating one circle, so as to achieve precise control of the size of the required loading axial force. The double-row angular contact ball bearing 143 is installed on the loading shaft and in the bearing sleeve 142.

[0034] According to the technical solution provided in the embodiment of the present application, when the axial force is applied, the combination of the buffer sleeve 15 and the variable-pitch compression spring 12 allows the axial force to be evenly and smoothly applied to the loading shaft, which plays a compensatory role and avoids unnecessary friction resistance. In addition, because the displacement direction of the axial force loading unit is parallel to the rotating shaft system, and the axial loading unit is simple, the entire force-adding device does not require much installation space, especially when the installation space is limited, it has its unique advantages. In addition, the force-adding device for the rotating shaft system has a simple structure, a small required installation space, an adjustable load application range, and high loading accuracy, and is an economical and efficient rotating shaft system force-adding solution.

[0035] In at least one embodiment of the present application, reference Figure 4 The support unit further includes a V-block 6 and an axial motion retaining mechanism 17. The bearing sleeve unit 14 is placed on the axial motion retaining mechanism 17 and is located above the V-block 6. The V-block 6 has a flat bottom and a protruding V-shaped portion, and the axial motion retaining mechanism 17 is installed in the V-shaped surface of the V-shaped portion of the V-block 6. In this way, by adding the axial motion retaining mechanism 17, the positioning accuracy of the axial motion is improved, the offset during moment loading is avoided, and a higher load-bearing capacity can be provided.

[0036] For example, refer to Figure 6 A symmetrical first groove 61 is provided in the V-block 6 , and the first groove 61 is used to install the axial movement retaining mechanism 17 .

[0037] In at least one embodiment of the present application, the axial motion retaining mechanism 17 adopts a plane bearing, and the plane bearing is installed in the V-block 6. In this way, it is conducive to the symmetrical loading of the radial moment, making the radial moment loading more uniform and stable, and not easy to damage the force-applying device. In addition, there is a line contact between the bearing sleeve unit and the plane bearing, and the friction resistance provided is small, which can be ignored compared to the axial force to be loaded, and can effectively avoid the interference force in other directions when applying the axial force and radial force.

[0038] Similar to the axial force, there are certain difficulties in applying radial force to the rotating shaft system, and it is necessary to ensure that there are no other interfering forces. Therefore, in order to accurately control the application of radial force, at least one embodiment of the present application is also provided with a radial force loading unit. The structural design of the radial force loading unit is described below with examples in conjunction with specific embodiments.

[0039] In at least one embodiment of the present application, reference Figures 1 to 3 , the force-adding device for the rotating shaft system also includes a radial force loading unit. The support unit also includes a bearing stand 2 and a V-block 6. The radial force loading unit includes a jack 3, a radial support plate 4, a radial force sensor 5, a butterfly spring 16 and a stud 18. The jack 3 is mounted on the bearing stand 2 of the support unit, the radial support plate 4 is placed above the jack 3, the radial force sensor 5 is mounted on the upper surface of the radial support plate 4, the butterfly spring 16 is mounted on the radial force sensor 5, the stud 18 passes through the radial force sensor 5 and the butterfly spring 16, and one end of the stud 18 is connected to the radial support plate 4. The other end of the stud 18 is connected to the lower surface of the V-block 6.

[0040] According to the technical solution provided in the embodiment of the present application, when radial force is applied, the jack 3 will pressurize and lift against the lower surface of the radial support plate 4. When the jack 3 is lifted, the top realizes radial force loading on the upper component through the radial support plate 4. The radial support plate 4 avoids direct contact between the jack 3 and the radial force sensor 5, thereby improving the loading accuracy of the radial force. When radial force is loaded, the upper part of the butterfly spring 16 presses against the lower surface of the V-block 6, but the two are not rigidly connected to avoid excessive rigid connection loading. The butterfly spring 16 can also play a buffering role in the loading of radial force. At the same time, it can also make the radial force be evenly and smoothly applied to the loading shaft. In addition, the force-adding device has a simple structure, small installation space, adjustable load application range, and high loading accuracy. It is an economical and efficient rotating shaft system force-adding solution.

[0041] It should be noted that before the experiment, the weight of the V-block 6 and the upper component installed on the V-block 6 can be measured; during radial loading, the radial force is loaded by pressurizing the jack 3, and the signal output value of the radial force sensor 5 is observed at the same time. The loading value offsets the deadweight of the V-block 6 and the upper component installed thereon, and then the jack 3 is pressurized. The jack 3 lifts and pushes the radial support plate 4 and the radial force sensor 5 fixed on the radial support plate. The butterfly spring 16 transmits the loading force received to the V-block 6 and the axial movement retaining mechanism 17 fixed in the V-block 6. The axial movement retaining mechanism 17 pushes the bearing sleeve 142, and the bearing sleeve 142 finally transmits the force to the loading shaft through two double-row angular contact ball bearings 143; the output signal value of the radial force sensor displayed on the computer can be used to know the magnitude of the radial loading force on the shaft system.

[0042] In at least one embodiment of the present application, the support unit further includes a base 1, a vertical motion holding mechanism 7 and a guide column 8. The gantry 9 stands on the base 1, the bearing platform 2 is placed flat on the base 1, the guide column 8 stands on the bearing platform 2, and the guide column 8 passes through the vertical motion holding mechanism 7; the vertical motion holding mechanism 7 is installed on the V-block 6. In this way, by adding the vertical motion holding mechanism 7, the positioning accuracy of the vertical motion is improved, and the offset during torque loading can be avoided. At the same time, the vertical motion holding mechanism 7 has a high load-bearing capacity and is easy to install and maintain.

[0043] It should be noted that, when in use, the heights of the guide column 8 and the gantry 9 can be adjusted according to the position of the shaft system.

[0044] In at least one embodiment of the present application, reference Fig.13 The lower parts of the four guide pillars 8 are connected with the first step hole 201, the second step hole 202, the third step hole 203 and the fourth step hole 204 of the bearing stand 2. The four guide pillars 8 pass through the vertical motion holding mechanism 7. The bottom of the plane of the V-shaped block 6 has four holes for installing the vertical motion holding mechanism 7.

[0045] In at least one embodiment of the present application, the jack 3 is a hydraulic jack. In this way, the hydraulic jack can provide a large radial force loading, effectively prevent overload, and facilitate the stable and continuous loading and precise adjustment of the torque.

[0046] In at least one embodiment of the present application, the vertical motion holding mechanism 7 is composed of a guide sleeve and a guide column. Thus, by setting the vertical motion holding mechanism 7 to be composed of a guide sleeve and a guide column, the motion gap can be effectively reduced, and a smooth guide can be provided. Due to its small friction resistance, the radial force can be ignored compared to the required loading.

[0047] In at least one embodiment of the present application, both the radial force sensor 5 and the axial force sensor 13 are annular force sensors, which can provide high-precision force measurement, help to evenly distribute the measurement force in the entire annular area, and reduce the impact of local stress concentration.

[0048] In at least one embodiment of the present application, reference Fig. 9 The bearing sleeve unit 14 also includes a left end cover 141 and a right end cover 144, which are respectively mounted on both ends of the bearing sleeve 142. In this way, the use of double-row angular contact ball bearings can simultaneously withstand the torque in both radial and axial directions, effectively maintaining the stability of the shaft system, and the use of a separate bearing sleeve structure is conducive to the installation, disassembly and maintenance of the bearing. This structural combination can effectively reduce noise and vibration during operation and improve the overall performance of the device.

[0049] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0050] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprises" and "includes" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0051] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A force adding device for a rotating shaft system, characterized in that: Including support unit and axial force loading unit, The support unit includes a gantry and a bearing sleeve unit, the bearing sleeve unit includes a bearing sleeve and two double-row angular contact ball bearings, the double-row angular contact ball bearings are installed in the bearing sleeve, and the loading shaft is connected to the bearing sleeve through the two double-row angular contact ball bearings. The axial force loading unit includes an axial loading sleeve, a small round nut, a variable pitch compression spring, an axial force sensor and a buffer sleeve. The axial force sensor is close to the side of the bearing sleeve unit, the buffer sleeve is connected to the other side of the axial force sensor, the variable pitch compression spring is sleeved on the buffer sleeve, the axial loading sleeve is connected to the gantry through the small round nut, the axial loading sleeve is pressed against one end of the variable pitch compression spring, and the displacement direction of the axial force loading unit is parallel to the rotating shaft system. When the axial force is loaded, the axial loading sleeve is rotated to support the variable pitch compression spring. The other end of the variable pitch compression spring pushes the buffer sleeve and the axial force sensor. The axial force sensor transmits the loading force to the bearing sleeve. The bearing sleeve transmits the loading force to the two double-row angular contact ball bearings, and finally transmits the loading force to the loading shaft through the double-row angular contact ball bearings.

2. The force adding device for a rotating shaft system according to claim 1, characterized in that: The support unit also includes a V-shaped block and an axial movement retaining mechanism. The bearing sleeve unit is placed on the axial movement retaining mechanism and is located above the V-shaped block. The V-shaped block has a flat bottom and a protruding V-shaped portion. The axial movement retaining mechanism is installed in the V-shaped surface of the V-shaped portion of the V-shaped block.

3. The force adding device for a rotating shaft system according to claim 2, characterized in that: The axial motion retaining mechanism adopts a plane bearing, and the plane bearing is installed in the V-block.

4. The force adding device for a rotating shaft system according to claim 1, characterized in that: The bearing sleeve unit further comprises a bearing sleeve left end cover and a bearing sleeve right end cover, and the bearing sleeve left end cover and the bearing sleeve right end cover are respectively installed at two ends of the bearing sleeve.

5. The force adding device for a rotating shaft system according to any one of claims 1 to 4, characterized in that: Also includes radial force loading unit, The support unit also includes a bearing platform and a V-block, and the radial force loading unit includes a jack, a radial support plate, a radial force sensor, a butterfly spring and a stud. The jack is installed on the bearing platform of the support unit, the radial support plate is placed above the jack, the radial force sensor is installed on the upper surface of the radial support plate, the butterfly spring is installed on the top of the radial force sensor, the stud passes through the radial force sensor and the butterfly spring, one end of the stud is connected to the radial support plate, and the other end of the stud is connected to the lower surface of the V-block.

6. The force adding device for a rotating shaft system according to claim 5, characterized in that: The support unit also includes a base, a vertical motion holding mechanism and a guide column. The gantry stands on the base, the bearing platform is placed flat on the base, the guide column stands on the bearing platform, the guide column passes through the vertical motion holding mechanism, and the vertical motion holding mechanism is installed on the V-block.

7. The force adding device for a rotating shaft system according to claim 6, characterized in that: There are four guide columns, the lower parts of the four guide columns are connected to the first step hole, the second step hole, the third step hole and the fourth step hole of the guide column bearing platform, the four guide columns pass through the vertical motion holding mechanism, and the bottom of the V-block plane has four holes, and the four holes are used to install the vertical motion holding mechanism.

8. The force adding device for a rotating shaft system according to claim 6, characterized in that: The vertical motion holding mechanism is composed of a guide sleeve and a guide column.

9. The force adding device for a rotating shaft system according to claim 5, characterized in that: The jack is a hydraulic jack.

10. The force adding device for a rotating shaft system according to claim 5, characterized in that: The radial force sensor and the axial force sensor are both annular force sensors.

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