A measuring device

Abstract

This application discloses a measuring device, belonging to the technical field of measuring devices. The device includes a crossbeam with a through groove; a support leg connected to the crossbeam; and a measuring mechanism including a main body and a moving part. The moving part is sleeved on the main body, and the main body is connected to the crossbeam through the through groove. The moving part moves axially within the main body to measure the component to be measured. This device achieves accurate and flexible measurement of the component to be measured through a measuring mechanism that can slide along the through groove on the crossbeam. The overall device structure is simple and reliable, effectively improving measurement efficiency and flexibility.

Description

Technical Field

[0001] This application relates to the field of measurement technology, specifically to a measuring device. Background Technology

[0002] Long bolts are key fasteners for multi-disc rotor components and are widely used in aero-turbine gas engines and ground gas turbines. The function of long bolts is to pass through and connect multiple rotor components through the disc core holes. The pressure and elongation of long bolts have a direct impact on the rigidity and dynamic characteristics of multi-disc rotors. Therefore, in the assembly of multi-disc rotors, there are usually precise control requirements for the elongation of long bolts. The existing measurement method involves measuring once before and once after stretching, and then calculating the difference to obtain the stretching amount. However, in reality, long bolts are generally measured in an assembled state. In this state, there is a rotating bearing between the rotor and stator, and the bearing has axial clearance. Currently, the influence of the bearing axial clearance is not considered in the measurement. Before and after stretching, the number of rotor parts on the long bolt changes, causing the overall weight of the long bolt to change. This results in changes in the force on the inner or outer ring of the bearing, which may lead to differences in the axial position between the inner and outer rings. Ultimately, this leads to inaccurate measurement of the long bolt stretching amount. Furthermore, the existing measuring device uses a fixed measuring device, which can only measure long bolts of a single rotor size and a single location. When the rotor type changes or when measuring long bolts at different locations is required, the operator needs to repeatedly move the entire device or the rotor itself for alignment and repositioning. The measuring device has poor flexibility and low measurement efficiency. Summary of the Invention

[0003] This application provides a measuring device that achieves accurate and flexible measurement of the component to be measured by setting a through groove on the crossbeam and designing a measuring mechanism that can slide along the through groove on the crossbeam. The overall device has a simple and reliable structure, effectively improves measurement efficiency and flexibility, and solves the technical problem that the influence of bearing axial clearance is not considered when measuring the tensile amount of long bolts.

[0004] According to one aspect of this application, a measuring device is provided, comprising: a crossbeam having a through groove; a support leg connected to the crossbeam; and a measuring mechanism including a mechanism body and a moving part, the moving part being sleeved on the mechanism body, the mechanism body being connected to the crossbeam via the through groove, and the moving part being axially moved within the mechanism body to measure the component to be measured.

[0005] As a further embodiment of this application, the crossbeam is a cross structure, and the crossbeam body of the cross structure is provided with the through groove.

[0006] As a further embodiment of this application, the support leg has a triangular-like structure.

[0007] As a further embodiment of this application, the support leg is a hollow structure.

[0008] As a further embodiment of this application, the device further includes a detachable part, which connects the support leg and the crossbeam via the through groove.

[0009] As a further embodiment of this application, the detachable part includes a connecting rod and a locking sleeve; the locking sleeve is connected to one end of the connecting rod and is used to fix the connecting rod to the crossbeam; the connecting rod passes through the through groove, and the other end of the connecting rod is connected to the support leg.

[0010] As a further embodiment of this application, the main body of the mechanism includes a limiting member and a bushing, the limiting member being radially connected to the bushing; the bushing is provided with a threaded pair and a sliding pair inside, the bushing being axially disposed in the through groove and fixed to the crossbeam by the limiting member.

[0011] As a further embodiment of this application, the moving part includes a helical drive component and a sliding component. The helical drive component engages with the threaded pair for transmission. The tail of the helical drive component is connected to the sliding component and is used for axial movement and radial rotation of the sliding component. The sliding component includes a sliding rod, an abutment block, and a threaded block. The sliding rod is used to move axially in cooperation with the sliding pair under the action of the threaded drive component. The threaded block is used to connect with the component under test. The abutment block is used to ensure that the threaded block is fully connected to the component under test.

[0012] As a further embodiment of this application, the limiting member and the bushing are connected radially by a thread.

[0013] As a further embodiment of this application, the measuring device further includes a base, which is connected to the support legs, and the base is provided with mounting holes for fixing the measuring device.

[0014] This application has the following beneficial effects: The measuring device of this application includes a crossbeam with a through groove; a support leg connected to the crossbeam; and a measuring mechanism including a main body and a moving part. The moving part is fitted onto the main body, which is connected to the crossbeam via the through groove. The moving part moves axially within the main body to measure the component under test. This device achieves accurate and flexible measurement of the component under test through a measuring mechanism that can slide along the through groove on the crossbeam. The overall device structure is simple and reliable, effectively improving measurement efficiency and flexibility.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional schematic diagram of the measuring device according to a preferred embodiment of this application; Figure 2 This is a top view of the measuring device according to a preferred embodiment of this application; Figure 3 This is a front view of the measuring device according to a preferred embodiment of this application; Figure 4 This is a front cross-sectional view of a portion of the measuring device including a detachable part in a preferred embodiment of this application; Figure 5 This is a front cross-sectional view of the measuring mechanism of the measuring device according to a preferred embodiment of this application; Figure 6 This is a schematic diagram showing the connection between the measuring device and the component to be measured according to a preferred embodiment of this application; Figure 7 This is a front cross-sectional view of the moving part in a preferred embodiment of this application; Figure 8 This is a schematic diagram of the slider in a preferred embodiment of this application.

[0017] Legend: 1. Component to be tested; 2. Crossbeam; 3. Support leg; 4. Detachable part; 41. Connecting rod; 42. Locking sleeve; 421. Threaded part; 422. Contact part; 5. Measuring surface; 6. Through groove; 7. Limiting component; 71. First limiting component; 72. Second limiting component; 8. Bushing; 9. Screw drive component; 10. Sliding component; 101. Sliding rod; 102. Abutment block; 103. Threaded block; 104. Relief hole; 11. Base; 12. Mounting hole; 13. Stator; 14. Ball bearing. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0019] To facilitate a thorough understanding of the technical details of the measuring device of this application by those skilled in the art, Figure 6 exemplarily illustrates a specific application scenario of the measuring device, namely, the connection relationship and measurement state diagram between the measuring device and the component under test containing the component under test. However, it should be clearly stated that the component under test shown in Figure 6 (specifically including component under test 1, stator 13, and ball bearing 14) is merely an example for illustrating the technical solution of this application and does not constitute any limitation on the scope of protection of this application.

[0020] It should be noted that the technical solutions of the embodiments of this application are described below using... Figures 1-8 When describing one of the accompanying drawings (the target drawing), in order to present some technical details more clearly and completely, legends from other drawings besides this drawing will also be used. In this process, all legend names (including but not limited to component names, identifier symbols, structural codes, etc.) and drawing numbers involved in all drawings are unique and consistent in this application document. There are no conflicts or confusions in legend names or numbers, nor does it mean that the technical description of the target drawing is unclear, incomplete or ambiguous, nor does it affect those skilled in the art from accurately understanding the technical solutions of the embodiments of this application based on the content disclosed in this application document.

[0021] Please see Figure 1 In conjunction with other accompanying drawings, this embodiment provides a technical solution for a measuring device: including a crossbeam 2, the crossbeam 2 being provided with a through groove 6; a support leg 3, the support leg 3 being connected to the crossbeam 2; and a measuring mechanism, the measuring mechanism including a mechanism body and a moving part, the moving part being sleeved on the mechanism body, the mechanism body being connected to the crossbeam 2 through the through groove 6, and the moving part being axially moved within the mechanism body to measure the component 1 to be measured.

[0022] It should be noted that the measuring device of this application is used to accurately and flexibly measure the axial or radial displacement of the component 1 to be measured by means of a measuring body that can slide along the through groove 6 on the crossbeam 2. This application can be applied to the tensile amount of long bolts inside the rotor, that is, the component 1 to be measured is a long bolt. The moving part in the measuring body realizes accurate and flexible measurement of the change in the tensile amount of the long bolt. This application can also be applied to the measurement needs of other similar structures. The following embodiments are described in detail for measuring the tensile amount of long bolts inside the rotor.

[0023] The measuring device of this embodiment can be used to measure the tensile strength of long bolts inside a rotor. It includes a crossbeam 2, support legs 3, and a measuring mechanism. The support legs 3 are connected to the crossbeam 2; for example, at least two support legs 3 can be connected to the crossbeam 2 to support and fix it. A through-slide groove 6 is provided on the crossbeam 2. The upper surface of the crossbeam 2 (i.e., the upper surface of the through-slide groove 6) serves as the measuring surface 5, which is the measurement reference. The upper and lower surfaces of the through-slide groove 6 are connected. Except for both ends of the crossbeam 2, the crossbeam 2 is provided with through-slide grooves 6. Therefore, the through-slide groove 6 can form a long, narrow cavity for the measuring instrument to pass through the measuring surface 5 to measure the shaft length of the long bolt. The measuring mechanism includes a main body and a moving part. The main body is connected to the crossbeam 2 via a through groove 6 and slides on the crossbeam 2. The moving part is fitted inside the main body and can move axially within the main body to achieve a precise connection for the long bolt. After the bottom end of the moving part is connected to the end face of the long bolt, the moving part applies a force to the long bolt to make it move axially. The force can eliminate the axial clearance of the long bolt relative to the bearing. The measuring instrument passes through the through groove 6 to accurately measure the tension of the long bolt. Since the main body of the mechanism can slide along the crossbeam 2, and the moving part can slide along the crossbeam 2 together with the main body of the mechanism, when it is necessary to measure the long bolts located at different positions of the rotor, the position of the moving part can be adjusted directly through the sliding measuring mechanism to achieve precise connection between the moving part and the long bolt and to perform the measurement. There is no need to repeatedly move the entire device or move the position of the rotor, and there is no need to align and reposition after moving. This can improve the flexibility and efficiency of measurement, adapt to various types of rotors and long bolts at any position, and has wide applicability.

[0024] Preferably, the crossbeam 2 has a cross structure, and each crossbeam 2 has a through groove 6.

[0025] like Figure 2 As shown, the crossbeam 2 is composed of a horizontal crossbeam and a vertical crossbeam, forming a cross structure. The crossbeam 2 can also be other similar structures. The specific structure of the crossbeam 2 can be adapted to the type and position of the component 1 to be measured. This embodiment does not limit this.

[0026] Preferably, the support leg 3 has a triangular structure.

[0027] Specifically, the triangular-like structure is formed by chamfering and rounding the three vertices of an equilateral triangle to create a structure similar to a triangle. The purpose of this structure is to improve the stability of the support leg 3 for the beam support.

[0028] Preferably, the support leg 3 is a hollow structure.

[0029] It should be noted that the hollow structure in this embodiment is formed by hollowing out the middle of a solid triangle to create a triangular ring structure with a cavity, thereby reducing the overall weight of the measuring device.

[0030] The measuring device in this embodiment also includes a base 11, which is connected to the support leg 3. The base 11 is provided with mounting holes 12 for fixing the measuring device.

[0031] like Figure 3 As shown, the end of the support leg 3 that is connected to the rotor is provided with a base 11. The base 11 is used to fix the measuring device and stably install the measuring device on the base located on both sides of the rotor (the base is used to fix the measuring device at a suitable position for measuring the tension of the long bolt in the rotor). Further, the end of the base 11 that is connected to the base is provided with a mounting hole 12. The support leg 3 is provided with a bolt hole coaxial with the mounting hole 12 of the base 11 at the corresponding position. At the same time, the end of the base that is connected to the base 11 is provided with a bolt hole coaxial with the mounting hole 12. By aligning the mounting hole on the base 11 with the bolt hole on the base and the support leg 3 and passing the bolt through, the fixed connection between the support leg 3 and the base can be completed through the base 11. Moreover, the base 11 and the support leg 3 are detachably connected. Since different types of rotors require different types of bases, when connecting with bases of different sizes or types, bases 11 of different sizes can be replaced to adapt to different types of bases and rotors.

[0032] The measuring device in this embodiment also includes a detachable part 4, which is connected to the support leg 3 and the crossbeam 2 via a through groove 6.

[0033] Specifically, the detachable part 4 is connected to the corresponding support leg 3 through the through groove 6. The detachable part can adjust the position of the support leg 3 by sliding along the through groove 6. If the crossbeam 2 is composed of a horizontal crossbeam and a vertical crossbeam forming a cross structure, then the through groove 6 is also a cross structure. When measuring rotors of different sizes, the support leg 3 can be slid along the crossbeam 2 by moving the detachable part 4. That is, the distance between the two support legs 3 can be adjusted by the detachable part 4, so that the measuring device of this application can be stably mounted on rotors of any size and type, improving the adaptability of the measuring device. Furthermore, since the crossbeam 2 has a through groove, space on the crossbeam 2 can be saved, and the volume of the crossbeam 2 can be reduced. Moreover, the detachable part 4 and the measuring instrument will not interfere with each other in the through groove 6, and will not affect the normal use of the overall device.

[0034] Furthermore, the detachable part 4 includes a connecting rod 41 and a locking sleeve 42. The locking sleeve 42 is connected to one end of the connecting rod 41 and is used to fix the connecting rod 41 to the crossbeam 2. The connecting rod 41 passes through the through groove 6, and the other end of the connecting rod 41 is connected to the support leg 3.

[0035] like Figure 4 As shown, the detachable part 4 includes a connecting rod 41 and a locking sleeve 42. The connecting rod 41 passes through the through groove 6 and can slide in the through groove 6 along the horizontal beam direction or perpendicular to the beam direction. The first end of the connecting rod 41 (i.e., the end near the locking sleeve 42) is threadedly engaged with the locking sleeve 42, and the second end of the connecting rod 41 (i.e., the end away from the locking sleeve 42) is fitted with the support leg 3. After the support leg 3 is moved to a suitable position, the locking sleeve 42 on the connecting rod 41 is tightened. The position of the connecting rod 41 in the through groove 6 is fixed by the contact between the locking sleeve 42 and the surface of the beam 2. Through the threaded engagement, the support leg 3 can slide continuously in the through groove 6 with the help of the connecting rod 41, thereby achieving precise and flexible adjustment of the spacing of the support leg 3 to adapt to stators 13 of different sizes. Once the position of the support leg 3 is determined, only the locking sleeve 42 needs to be tightened to fix the detachable part 4 to the beam 2 by the huge axial preload generated by the threaded pair.

[0036] Furthermore, the locking sleeve 42 includes a threaded portion 421 for threaded engagement with the connecting rod 41 and a contact portion 422 for abutting against the surface of the crossbeam 2. The coefficient of friction of the contact portion 422 surface is greater than that of the threaded portion 421 surface. The contact portion 422 contacts the crossbeam 2, thereby increasing the frictional force between them and further increasing the stability of the connecting rod 41 after it is fixed. Specifically, the first end of the connecting rod 41 is machined with an external thread. Correspondingly, the locking sleeve 42 has a through hole inside. The lower part of the hole is the threaded portion 421, and the inner wall of the threaded portion 421 is machined with an internal thread that matches the external thread of the connecting rod 41. The locking sleeve 42 also includes a contact portion 422 for abutting against the surface of the crossbeam 2. This contact portion 422 is an annular flange or washer-shaped structure with a diameter larger than the width of the through groove 6, which facilitates the sliding of the locking sleeve 42 along the crossbeam 2 in the through groove 6. When it is necessary to fix the support leg 3, the locking sleeve 42 is tightened. As the locking sleeve 42 rotates downward (towards the crossbeam 2), the lower surface of the contact portion 422 will be tightly connected with the upper surface of the crossbeam 2 (i.e., the measuring surface 5). The top of the support leg 3 is provided with a receiving groove or through hole that matches the shape of the second end of the connecting rod 41. When the locking sleeve 42 is rotated from above, the connecting rod 41 will not rotate with the locking sleeve 42 because it is prevented from rotating by the fitting structure at the second end. This allows the locking sleeve 42 to effectively screw in or out on the thread of the connecting rod 41, realizing the function of clamping or loosening.

[0037] Preferably, the main body of the mechanism includes a limiting member 7 and a bushing 8, with the limiting member 7 being radially connected to the bushing 8; the bushing 8 has a threaded pair and a sliding pair inside, and the bushing 8 is axially arranged in the through groove 6 and fixed to the crossbeam 2 by the limiting member 7.

[0038] Preferably, the limiting member 7 is radially connected to the bushing 8 via a thread.

[0039] It should be noted that, as Figure 5 As shown, the limiting member 7 includes a first limiting member 71 and a second limiting member 72. The first limiting member 71 is attached to the upper surface of the crossbeam 2 (i.e., the measuring surface 5), and the second limiting member 72 is attached to the lower surface of the crossbeam 2. The first limiting member 71 and the second limiting member 72 are arranged opposite each other in the vertical direction to clamp a portion of the crossbeam 2 in the middle. The first limiting member 71 and the second limiting member 72 are radially connected to the bushing 8 by threads. The bushing 8 is fixed and limited to the through groove 6 of the crossbeam 2 by the first limiting member 71 and the second limiting member 72, while allowing the main body of the mechanism to slide and adjust along the groove to meet the measurement requirements at different positions. It should be noted that the first limiting member 71 and / or the second limiting member 72 can be integrally machined with the shaft. For example, flange edges can be directly machined at both ends of the bushing 8 as limiting members 7. The limiting member 7 and the bushing 8 can also be separate structures. For example, the outer surface of the bushing 8 can be provided with external threads, and the central through holes of the first limiting member 71 and the second limiting member 72 can be provided with matching internal threads. The first limiting member 71 and the second limiting member 72 are threadedly connected to the bushing through the internal threads. The limiting member 7 is connected to the bushing 8 and clamps the crossbeam 2 by screwing. In other embodiments, the limiting member 7 can also be fixedly connected to the bushing 8 by welding, pins, or keyways. The bushing 8 is a stepped shaft, and a certain assembly gap is maintained between the first limiting member 71 and the stepped surface of the bushing 8. This gap can eliminate the axial thrust applied to the first limiting member 71 due to the rotation of the bushing 8 during tightening or adjustment, thereby effectively preventing the first limiting member 71 from accidentally loosening. The limiting member 7 can be a cuboid or hexagonal prism with a through hole in the center. This polygonal design facilitates clamping and tightening operations using conventional tools (such as wrenches), making assembly, disassembly, and adjustment of the main body of the mechanism on the crossbeam 2 convenient. It also avoids applying torque to the moving part, preventing movement of the limiting member 7 and improving measurement stability. Alternatively, the limiting member 7 can be a circular ring with a through hole in the center. The specific shape of the limiting member 7 can be flexibly restricted according to application requirements; this embodiment does not impose such restrictions.

[0040] Furthermore, the moving part includes a screw drive component 9 and a sliding component 10. The screw drive component 9 engages with a threaded pair for transmission. The tail of the screw drive component 9 is connected to the sliding component 10 and is used for axial movement and radial rotation of the sliding component 10. The sliding component 10 includes a sliding rod 101, an abutment block 102, and a threaded block 103. The sliding rod 101 is used to move axially in cooperation with the sliding pair under the action of the threaded drive component. The threaded block 103 is used to connect with the component to be tested 1. The abutment block 102 is used to ensure that the threaded block 103 is fully connected with the component to be tested 1.

[0041] It should be noted that the inner wall of the bushing 8 is machined with internal threads, and correspondingly, the external thread of the screw drive component 9 is machined with external threads that match the internal threads of the bushing 8. The screw drive component 9 meshes with the internal threads of the bushing 8 through its external threads. When the screw drive component 9 is rotated radially (for example, when torque is applied to its head), the meshing thread pair converts the rotational motion into linear motion. That is, while the screw drive component 9 is rotated, it moves axially relative to the bushing 8, and the direction of movement depends on the direction of rotation. Furthermore, the bushing 8 is provided with a sliding pair inside, that is, a guide structure is also provided in the inner cavity of the bushing 8. This guide structure cooperates with the sliding rod 101 of the sliding component 10 to form a sliding bearing or guide sleeve structure. In this embodiment, the sliding pair can be a keyway. By setting a keyway on the inner wall of the bushing 8 and setting a matching flat key on the sliding rod 101, since the tail of the screw drive 9 is connected to the sliding member 10, the sliding rod 101 can move axially under the action of the threaded drive and cooperate with the sliding pair. The sliding pair cooperation ensures that the axis of motion of the sliding member 10 always coincides with the axis of the bushing 8, that is, coincides with the reference axis of the measuring device, ensuring that the force is applied accurately along the axial direction of the long bolt, avoiding measurement errors caused by off-center load, and improving measurement accuracy. The screw drive 9 can be a screw or a lead screw. The specific type of the screw drive 9 is not limited in this embodiment. The head of the screw drive 9 has a square hole required for torque measurement, and the square hole uses a common 1 / 4, 3 / 8, or 1 / 2 inch square hole.

[0042] Furthermore, such as Figure 6 and Figure 7 As shown, a threaded block 103 is connected to one end of the sliding member 10 near the long bolt. The end of the threaded block 103 away from the sliding rod 101 is provided with an external thread for engaging with the threaded long bolt 1 and for engaging with the internal thread of the long bolt, thereby realizing the threaded connection between the sliding member 10 and the long bolt to accommodate both internal and external threads on the long bolt. At the same time, in order to ensure that the engagement amount between the threaded block 103 and the long bolt is consistent each time, an abutment block 102 is provided on the upper surface of the threaded block 103 for abutting against the end face of the long bolt. When the long bolt engages with the threaded block 103 and contacts the abutment block 102, the long bolt will not be able to further engage with the threaded block 103. At this time, the threaded block 103 and the long bolt are engaged in place, ensuring that the thread engagement amount between the threaded block 103 and the long bolt is consistent each time, thereby ensuring measurement accuracy.

[0043] Furthermore, in order to facilitate the measurement of the position of the long bolt, a measurement position needs to be left at the end of the long bolt that meshes with the threaded block 103. Therefore, the projection of the abutment block 102 on the measurement surface 5 is smaller than the projection of the long bolt on the measurement surface 5, which can ensure that the abutment block 102 will not completely block the end face of the long bolt after it abuts with the long bolt, leaving space for subsequent measurement.

[0044] Figure 8 In another optional embodiment of the sliding member 10, a threaded sleeve is provided at the end of the sliding rod 101 near the long bolt. The threaded sleeve is connected to the sliding rod 101. The shape of the threaded sleeve is not limited in this application. For example, the threaded sleeve can be a cylindrical structure. A threaded groove for engaging with the threads of the long bolt is opened at the end of the threaded sleeve away from the sliding rod 101. The outer diameter of the threaded sleeve is larger than the outer diameter of the sliding rod 101 to form a stepped surface at the end of the threaded sleeve 104 facing the sliding rod 101. A relief hole 104 is opened on the stepped surface, extending axially from the threaded sleeve to the threaded groove. The relief hole 104 is used for the measuring instrument. The device extends into the threaded groove; the threaded sleeve engages with the long bolt. When the sliding rod 101 is driven away from the long bolt by the screw drive 9, the sliding rod 101 can drive the long bolt to move synchronously through the threaded sleeve, thereby applying a tensile force along its axial direction to the long bolt. When the long bolt is subjected to a tensile force along its axial direction, the tensile force will act on the bearing on which the long bolt is installed through the long bolt, which can also remove the axial clearance of the bearing. At the same time, the axial clearance of the bearing can be measured by the position difference of the long bolt when pressure and tension are applied to the long bolt, so as to determine whether the axial clearance of the bearing meets the requirements.

[0045] In some embodiments, when measuring the tensile strength of a long bolt whose position does not easily change, the moving part can be fixed along the crossbeam 2. In this case, the screw drive 9 in the moving part engages in the threaded hole in the crossbeam 2, and the axial direction of the screw drive 9 is parallel or coincident with the axial movement direction of the sliding member 10. The end of the screw drive 9 near the sliding member 10 is rotatably engaged with the sliding member 10. By rotating the screw drive 9, the sliding member 10 is driven to move axially. The head of the screw drive 9 extends beyond the measuring surface of the crossbeam 2 and is used to cooperate with a wrench to rotate the screw drive 9. The torque applied by rotating the screw drive 9 is converted into axial force through the threaded pair and transmitted to the sliding member 10 through the tail of the screw drive 9, ultimately acting on the long bolt. When rotating the screw drive 9 to apply tension and pressure to the long bolt, the head of the screw drive 9 can be rotated by a wrench to ensure that the applied torque is controlled within a set range, thereby controlling the tension and pressure applied to the long bolt within a set range. This also ensures that the pressure or tension on the long bolt is consistent when measuring C0 and C1, thus guaranteeing the accuracy of the measurement results.

[0046] The measuring device of this application can not only overcome the error influence of axial clearance on the measurement of the tensile amount of long bolts and accurately measure the tensile amount of long bolts, but also be used to measure the axial clearance of rotors. When the measuring device of this application is applied to the measurement of the tensile amount of rotor long bolts, in use, the long bolt is first installed on the rotor, and then the base 11 of the measuring device is installed on the flange end of the stator 13 (i.e., the aforementioned base), so that the axial movement direction of the sliding rod 101 is parallel to or coincides with the axial direction of the long bolt; wherein, in this embodiment, the shape of the flange end of the stator 13 is not limited, as long as the structural design of the flange end of the stator 13 and the base 11 can stably fix the support 3 to the flange end. For example, a boss is provided on the end of the flange away from the ball bearing 14 (i.e., the outer side of the flange end). The shape of the base 11 matches the flange end of the stator 13, and it can be tightly attached to the boss surface and inner side of the flange end of the stator 13 to prevent the support leg 3 from shaking. After fixing the support leg 3 to the flange end of the stator 13, the stability of the support leg 3 can be guaranteed, further increasing the installation stability of the overall support measuring device. Furthermore, the end of the base 11 used to connect with the flange end of the stator 13 is provided with a mounting hole 12. The support leg 3 is provided with a bolt hole coaxial with the mounting hole 12 of the base 11 at the corresponding position. By aligning the mounting hole 12 on the support leg 3 and the bolt hole on the flange end of the stator 13 and passing the bolt through, the fixed connection between the support leg 3, the base 11 and the flange end of the stator 13 is completed.

[0047] Then, the threaded block 103 or threaded sleeve 104 is engaged with the threaded long bolt. The screw drive 9 drives the sliding member 10 to move away from the long bolt, applying tension to the long bolt 1 through the sliding member 10. Under the action of the tension, the axial clearance of the rotor bearing is eliminated. At this time, a measuring instrument passes through the through groove 6 and contacts the first end face of the long bolt, measuring the distance C0 between the first end face of the long bolt and the measuring surface 5. C0 is the distance between the position of the long bolt before tightening or stretching and the measuring surface 5. Then, the device is moved from... The flange end of stator 13 is disassembled. After disassembly, parts are assembled onto the rotor, and the long bolt 1 is tightened or stretched. Then, the bracket is reassembled onto the flange end of stator 13. Similarly, the threaded block 103 or threaded sleeve 104 engages with the threads of the long bolt, and a set tension is applied to the long bolt. Next, the distance C1 between the first end face of the long bolt and the measuring surface 5 is measured using the same measuring instrument. C1 is the distance between the position of the long bolt after tightening or stretching and the measuring surface 5. The stretching amount of long bolt 1, C = |C0-C1|. This device is simple and convenient to use and operate. By controlling the force on the long bolt 1 before and after stretching, it effectively eliminates measurement errors caused by factors such as bearing clearance, and achieves accurate measurement of the elongation of long bolt 1 in the assembled state.

[0048] When measuring the axial clearance of the rotor bearing, a first force is first applied to the long bolt by rotating the screw drive 9, and the distance δ0 between the first end face of the long bolt and the measuring surface 5 is measured. Then, a second force is applied to the long bolt by rotating the screw drive 9, and the distance δ1 between the first end face of the long bolt and the measuring surface 5 is measured. The axial clearance of the bearing is then δ = |δ0 - δ1|, where the first force and the second force are equal in magnitude and opposite in direction.

[0049] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only for the purpose of helping to understand the methods and core ideas of this application. The above are only preferred embodiments of this application and are not intended to limit this application. It should be noted that due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this application, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered as protected by this application.

Claims

1. A measuring device, characterized in that, include: The crossbeam is provided with a through groove; Support legs, which are connected to the crossbeam; The measuring mechanism includes a main body and a moving part. The moving part is sleeved on the main body. The main body is connected to the crossbeam through the through groove. The moving part moves axially within the main body to measure the component to be measured.

2. The measuring device according to claim 1, characterized in that, The crossbeam has a cross-shaped structure, and the crossbeam body of the cross-shaped structure is provided with the through groove.

3. The measuring device according to claim 1, characterized in that, The support legs have a triangular-like structure.

4. The measuring device according to claim 3, characterized in that, The support legs are hollow.

5. The measuring device according to claim 1, characterized in that, The device also includes a detachable part, which connects the support leg and the crossbeam via the through groove.

6. The measuring device according to claim 5, characterized in that, The detachable part includes a connecting rod and a locking sleeve; The locking sleeve is connected to one end of the connecting rod and is used to fix the connecting rod to the crossbeam; the connecting rod passes through the through groove, and the other end of the connecting rod is connected to the support leg.

7. The measuring device according to claim 1, characterized in that, The main body of the mechanism includes a limiting member and a bushing, the limiting member being radially connected to the bushing; the bushing is provided with a threaded pair and a sliding pair inside, the bushing being axially arranged in the through groove and fixed to the crossbeam by the limiting member.

8. The measuring device according to claim 7, characterized in that, The moving part includes a helical drive component and a sliding component, wherein the helical drive component cooperates with the threaded pair for transmission. The tail end of the helical drive component is connected to the sliding component and is used for axial movement and radial rotation of the sliding component; The sliding component includes a sliding rod, an abutment block, and a threaded block. The sliding rod is used to move axially in cooperation with the sliding pair under the action of the helical transmission component. The threaded block is used to connect with the component under test. The abutment block is used to ensure that the threaded block is fully connected with the component under test.

9. The measuring device according to claim 7, characterized in that, The limiting member and the bushing are connected radially by a thread.

10. The measuring device according to any one of claims 1 to 9, characterized in that, The measuring device also includes a base, which is connected to the support legs, and the base is provided with mounting holes for fixing the measuring device.

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