A force adding device for a rotating shafting

Abstract

The application provides a force adding device for a rotating shaft system, which 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 compression spring, an axial force sensor and a buffer sleeve. The axial force sensor is in close contact with the side of the bearing sleeve unit, the buffer sleeve is connected with the other side of the axial force sensor, the variable compression spring is sleeved on the buffer sleeve, the axial loading sleeve is connected with the portal frame through the small round nut, and the axial loading sleeve is in abutment with one end of the variable compression spring. 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 compression spring, the axial force is uniformly and gently applied to the loading shaft, and the precise regulation and control of the application of the axial force are realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rotating shaft system, and particularly relates to a force adding device for a rotating shaft system. BACKGROUND

[0002] There are high-speed rotating shafts and bearings in the rotating shaft system, and the force on the shaft system has a great influence on the stability and service life of the rotating shaft system and even the whole mechanical transmission system. It is difficult to apply axial force to the rotating shaft system, and it is necessary to ensure that there is no other disturbing force. Therefore, how to accurately control the application of axial force has become a technical problem to be solved. SUMMARY

[0003] In view of this, the embodiments of the present application aim to provide a force adding device for a rotating shaft system, which solves the technical problem of how to accurately control the application of axial force 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 comprises a supporting unit, a radial loading unit and an axial loading unit. The supporting unit comprises a gantry and a bearing sleeve unit. The bearing sleeve unit comprises 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 with the bearing sleeve through the two double-row angular contact ball bearings. The axial force loading unit comprises an axial loading sleeve, a small round nut, a variable-distance compression spring, an axial force sensor and a buffer sleeve. The axial force sensor is in close contact with the side of the bearing sleeve unit, the buffer sleeve is connected with the other side of the axial force sensor, the variable-distance compression spring is sleeved on the buffer sleeve, the axial loading sleeve is connected with the gantry through the small round nut, and the axial loading sleeve is on one end of the variable-distance 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, the variable-distance compression spring is pushed, the other end of the variable-distance 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 the loading force is transmitted to the loading shaft through the double-row angular contact ball bearings.

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

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

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

[0008] In one embodiment of the present application, the force loading device for the rotating shaft system further comprises a radial force loading unit. The support unit further comprises a bearing table and a V-shaped block. The radial force loading unit comprises a jack, a radial support plate, a radial force sensor, a butterfly spring and a stud, the jack is installed on the bearing table 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 upper surface of the radial force sensor, the stud passes through the radial force sensor and the butterfly spring, and one end of the stud is connected with the radial support plate. The other end of the stud is connected with the lower surface of the V-shaped block.

[0009] In one embodiment of the present application, the support unit further comprises a base, a vertical motion retaining mechanism and guide columns. The gantry stands on the base, the bearing table is placed on the base, the guide columns stand on the bearing table, and the guide columns pass through the vertical motion retaining mechanism; the vertical motion retaining mechanism is installed on the V-shaped block.

[0010] In one embodiment of the present application, the lower parts of the four guide columns are connected with the first stepped hole, the second stepped hole, the third stepped hole and the fourth stepped hole of the bearing table. The four guide columns pass through the vertical motion retaining mechanism. The planar bottom of the V-shaped block has four holes for installing the vertical motion retaining mechanism.

[0011] In one embodiment of the present application, the jack is a hydraulic jack.

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

[0013] In one embodiment of the present application, the radial force sensor and the axial force sensor are both ring-shaped force sensors.

[0014] The technical scheme of the present application has the following advantages: when the axial force is applied, the combination of the buffer sleeve and the variable-distance compression spring makes the axial force uniformly and gently applied to the loading shaft, which plays a compensating 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 and radial loading mechanisms are simple, the entire force loading device has less requirement for the installation space, especially in the case of limited installation space, and has unique advantages. Furthermore, the force loading device for the rotating shaft system has the advantages of simple structure, small required installation space, adjustable loading range, high loading precision, and is an economical and efficient rotating shaft system force loading solution. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0016] Figure 2 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 1 A side view of a shafting force adding device according to an embodiment of the present application is shown.

[0017] Figure 3 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 1 A top view of a shafting force adding device according to an embodiment of the present application is shown.

[0018] Figure 4 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 1 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0019] Figure 5 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 4 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0020] Figure 6 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 5 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0021] Figure 7 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0022] Figure 8 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0023] Figure 9 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 8 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0024] Figure 10 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0025] Figure 11 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 10 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0026] Figure 12 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0027] Figure 13 A view of a shafting force adding device according to an embodiment of the present application is shown. Figure 12 A view of a shafting force adding device according to an embodiment of the present application is shown.

[0028] Figure 14Fig. 1 is a schematic view of a base of a force adding device for a rotating shaft system according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present 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 comprises a support unit, a radial loading unit and an axial loading unit. The support unit comprises a portal frame 9 and a bearing sleeve unit 14. The bearing sleeve unit 14 comprises a bearing sleeve 142 and two double-row angular contact ball bearings 143, which are installed in the bearing sleeve 142. The loading shaft is connected with the bearing sleeve 142 through the two double-row angular contact ball bearings 143.

[0031] The axial force loading unit comprises an axial loading sleeve 10, a small round nut 11, a variable-distance 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, the buffer sleeve 15 is connected with the other side of the axial force sensor 13, the variable-distance compression spring 12 is sleeved on the buffer sleeve 15, the axial loading sleeve 10 is connected with the portal frame 9 through the small round nut 11, and the axial loading sleeve 10 is on one end of the variable-distance 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 push against the variable-distance compression spring 12. The other end of the variable-distance 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. Finally, the loading force is transmitted to the loading shaft through the double-row angular contact ball bearings 143.

[0033] It should be noted that the two double-row angular contact ball bearings 143 can be installed face-to-face or back-to-back according to requirements. The axial force loading unit is a rotary feed mechanism. The axial loading sleeve 10 is provided with an axial through bolt. The axial loading sleeve 10 is provided with threads on the upper surface. The axial loading sleeve 10 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 and is used to transmit the axial loading force. The diameter of the axial loading sleeve 10 and the thread pitch on the upper surface can be designed according to requirements to control the distance of the axial loading sleeve 10 rotating one revolution, so as to accurately control the size of the required axial loading force. The double-row angular contact ball bearings 143 are installed on the loading shaft and in the bearing sleeve 142.

[0034] According to the technical scheme provided in the embodiments of the present application, when the axial force is applied, the combination of the buffer sleeve 15 and the variable pitch compression spring 12 enables the axial force to be uniformly and gently applied to the loading shaft, thereby playing a compensating role and avoiding unnecessary frictional resistance. In addition, because the displacement direction of the axial force loading unit is parallel to the rotating shaft system, and the axial force loading unit is simple, the entire force loading device has relatively small requirements for the installation space, and has unique advantages in the case of limited installation space. In addition, the force loading device for the rotating shaft system has the advantages of simple structure, small required installation space, adjustable loading range, and high loading precision, and is an economical and efficient force loading solution for the rotating shaft system.

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

[0036] For example, with reference to Figure 6 , the V-shaped block 6 is provided with symmetrical first grooves 61 for installing the axial motion 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-shaped block 6. In this way, it is beneficial to the symmetrical loading of the radial torque, so that the radial torque loading is more uniform and stable, and the force loading device is not easy to be damaged. In addition, the linear contact between the bearing sleeve unit and the plane bearing provides small frictional resistance, which can be ignored compared to the axial force to be loaded, and can effectively avoid the interference force in other directions when the axial force and the radial force are applied.

[0038] Similar to axial force, it is difficult to apply radial force to the rotating shaft system, and it is necessary to ensure that there is no other interference force. Therefore, in order to accurately control the application of radial force, at least one embodiment of the present application also provides a radial force loading unit. The structure design of the radial force loading unit will be illustrated below in combination with specific embodiments.

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

[0040] According to the technical scheme provided by the embodiment of the present application, when the radial force is applied, the jack 3 is lifted by pressure to press against the lower surface of the radial support plate 4. When the jack 3 is lifted, the top part realizes radial force loading on the upper part 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 the radial force is loaded, the upper part of the butterfly spring 16 is pressed against the lower surface of the V-shaped block 6, but the two are not rigidly connected, avoiding excessive rigid connection loading. The butterfly spring 16 can also play a buffering role in radial force loading, and at the same time, the radial force can be uniformly and stably applied to the loading shaft. In addition, the force loading device has the advantages of simple structure, small required installation space, adjustable loading range, high loading accuracy, and is an economical and efficient solution for rotating shaft system force loading.

[0041] It should be noted that before the experiment, the weight of the V-shaped block 6 and the components installed on the upper part of the V-shaped block 6 can be measured. When the radial force is loaded, the radial force is loaded by pressing the jack 3, and at the same time, the signal output value of the radial force sensor 5 is observed. The loading value offsets the weight of the V-shaped block 6 and the components installed on the upper part thereof, and then the jack 3 is pressed again. The jack 3 lifts 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 to the V-shaped block 6 and the axial motion retaining mechanism 17 fixed in the V-shaped block 6, the axial motion retaining mechanism 17 pushes the bearing sleeve 142, and the bearing sleeve 142 finally transmits the force to the loading shaft through the two double-row angular contact ball bearings 143. The output signal value of the radial force sensor displayed on the computer is observed, and the size of the radial loading force on the shaft system can be known.

[0042] In at least one embodiment of the present application, the support unit further includes a base 1, a vertical motion retaining mechanism 7, and guide columns 8. The gantry 9 stands on the base 1, the bearing platform 2 rests flat on the base 1, and the guide columns 8 stand on the bearing platform 2, passing through the vertical motion retaining mechanism 7; the vertical motion retaining mechanism 7 is mounted on the V-block 6. The addition of the vertical motion retaining mechanism 7 improves the positioning accuracy of vertical motion, preventing offset during torque loading. Furthermore, the vertical motion retaining mechanism 7 has a high load-bearing capacity and is easy to install and maintain.

[0043] It should be noted that, during 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 Figure 13 The lower portions of the four guide posts 8 are connected to the first, second, third, and fourth stepped holes 201, 202, 203, and 204 of the bearing block 2. The four guide posts 8 pass through the vertical motion retaining mechanism 7. The flat bottom of the V-block 6 has four holes for mounting the vertical motion retaining 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 realization of stable and continuous loading and precise adjustment of torque.

[0046] In at least one embodiment of the present application, the vertical motion maintaining mechanism 7 is formed by a combination of a guide sleeve and a guide post. Thus, by configuring the vertical motion maintaining mechanism 7 to be formed by a combination of a guide sleeve and a guide post, the motion clearance can be effectively reduced, providing smooth guidance. Due to the low friction resistance, the radial force required 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. This can provide high-precision force measurement, facilitate uniform distribution of the measurement force throughout the annular region, and reduce the impact of local stress concentration.

[0048] In at least one embodiment of the present application, reference Figure 9 The bearing sleeve unit 14 also includes a left end cap 141 and a right end cap 144, which are mounted on opposite ends of the bearing sleeve 142. The double-row angular contact ball bearings can withstand both radial and axial torques, effectively maintaining the stability of the shafting. The split bearing sleeve structure facilitates bearing installation, removal, and maintenance. This structural combination effectively reduces noise and vibration during operation, improving the overall performance of the device.

[0049] It should be noted that the combination modes of various technical features in the embodiments of the present application are not limited to the combination modes described in the embodiments of the present application or the combination modes described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any mode, unless contradictory.

[0050] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not mean a single number, but can also include a plurality. Generally, the terms "comprising" and "including" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0051] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall 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. 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 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 above 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, and 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, which 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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