A fixture for measuring the axial thermal expansion of a rotating shaft

Abstract

This utility model discloses a fixture for measuring the axial thermal expansion of a rotating shaft, relating to the field of glass substrate manufacturing technology. It mainly consists of a positioning sleeve, a scale holder, a rolling bearing, a small pressure cap, and a large pressure cap. The positioning sleeve is fitted onto the rotating shaft roller neck, fitting tightly with its end faces abutting to reduce measurement errors. The scale holder is connected to the positioning sleeve via the rolling bearing, and its tail end has a grooved handle for holding the scale. The small pressure cap is fixed to the positioning sleeve and the inner ring of the rolling bearing by a second bolt, while the large pressure cap is fixed to the scale holder and the outer ring of the rolling bearing by a first bolt. In use, the fixture is first installed, the handle is released to allow it to hang naturally, the 0-gradient end of the scale is placed against the furnace surface and inserted into the groove to measure the initial distance. Subsequent periodic measurements and calculations of the difference yield the thermal expansion. This fixture provides accurate measurements, offering a reliable basis for equipment and process adjustments, improving equipment operational stability and product quality, and ensuring safe operation.

Description

Technical Field

[0001] This utility model relates to the field of glass substrate manufacturing technology, and in particular to a tooling for measuring the axial thermal expansion of a rotating shaft. Background Technology

[0002] During the production of glass substrates, after installing equipment in high-temperature zones, process and equipment technicians need to measure the thermal expansion of the equipment, including the axial expansion of many rotating shafts.

[0003] Currently, process and equipment technicians measure the axial expansion of rotating shafts by directly using a right-angle vernier caliper or steel ruler against the shaft's limiting component and measuring the distance from the shaft end to the limiting component. This distance is then used as a reference for the axial expansion of the rotating shaft, allowing technicians to adjust equipment design dimensions and process parameters accordingly. This method not only lacks precision but also poses certain risks to operators during the actual measurement process. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a tooling for measuring the axial thermal expansion of a rotating shaft.

[0005] This utility model proposes a fixture for measuring the axial thermal expansion of a rotating shaft, comprising:

[0006] The positioning sleeve is fitted onto the outside of the rotating shaft roller neck, and the outer end face of the rotating shaft roller neck is in close contact with the inner end face of the positioning sleeve cavity.

[0007] The scale holder is rotatably connected to the outside of the positioning sleeve via a rolling bearing, and a handle is connected to the tail end of the scale holder;

[0008] The small pressure cap is placed between the positioning sleeve and the inner ring of the rolling bearing to fix the positioning sleeve and the inner ring of the rolling bearing.

[0009] The large pressure cap is located between the scale base and the outer ring of the rolling bearing to fix the scale base and the outer ring of the rolling bearing.

[0010] The second bolt passes through the small pressure cap, and its threaded end passes through the inner ring of the rolling bearing and connects to the threaded hole reserved at the end of the positioning sleeve.

[0011] The first bolt passes through the edge of the large pressure cap, and its threaded end connects to the threaded hole reserved at the end of the scale seat.

[0012] Furthermore, grooves are symmetrically provided on both sides of the handle end, the grooves are used to accommodate the scale, and the width of the grooves is adapted to the width of the scale.

[0013] The beneficial effects of this utility model are as follows: By using a design where the positioning sleeve fits tightly against the roller neck of the rotating shaft and the end face abuts against each other, combined with a stable connection structure of each component, the axial thermal expansion of the rotating shaft can be accurately measured. This provides precise data for equipment and process personnel, enabling them to adjust equipment and process parameters in a timely and accurate manner based on the data. This effectively avoids equipment failures and production errors caused by abnormal thermal expansion of the rotating shaft, significantly improves the stability of equipment operation and product quality, and reduces equipment maintenance costs and production scrap rate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a half-sectional view of the assembled version of this utility model;

[0016] Figure 3 This is a structural sketch of the present invention in its operational state.

[0017] In the diagram: 1. Positioning sleeve; 2. Scale seat; 21. Handle; 22. Groove; 3. Rolling bearing; 4. Small pressure cap; 5. Large pressure cap; 6. First bolt; 7. Second bolt; 8. Scale; 9. Furnace body; 10. Rotating shaft. Detailed Implementation

[0018] Reference Figure 1-2 The present invention proposes a fixture for measuring the axial thermal expansion of a rotating shaft, which mainly consists of a positioning sleeve 1, a scale base 2, a rolling bearing 3, a small pressure cap 4, and a large pressure cap 5, as detailed below:

[0019] The positioning sleeve 1 is a hollow cylinder with an inner diameter that matches the outer diameter of the rotating shaft roller neck. This ensures that when the positioning sleeve 1 is fitted onto the outside of the rotating shaft roller neck, the inner end face of the cavity of the positioning sleeve 1 fits tightly against the outer end face of the rotating shaft roller neck. This design can effectively reduce the error caused by the gap between components when measuring the axial thermal expansion of the rotating shaft, providing a basic guarantee for accurate measurement.

[0020] The scale base 2 is rotatably connected to the positioning sleeve 1 through the rolling bearing 3. The tail end of the scale base 2 is connected to the handle 21, which is convenient for the operator to hold and operate. At the same time, the handle 21 is also the reference object for measurement. The two sides of the tail end of the handle 21 are symmetrically provided with grooves 22. The width of the grooves 22 is adapted to the width of the scale 8, so that the scale 8 can be stably placed in the grooves 22 during subsequent measurement, and will not easily shake or shift during the measurement, thereby ensuring the accuracy of the measurement.

[0021] The small pressure cap 4 is used to fix the positioning sleeve 1 and the inner ring of the rolling bearing 3. It is disc-shaped. The second bolt 7 is installed through the inside of the small pressure cap 4. The threaded end of the second bolt 7 passes through the inner ring of the rolling bearing 3 and connects with the threaded hole reserved at the end of the positioning sleeve 1. By tightening the second bolt 7, the small pressure cap 4 can firmly fix the positioning sleeve 1 and the inner ring of the rolling bearing 3 together, preventing relative displacement between the two during rotation and ensuring the stability of the tooling structure.

[0022] The large pressure cap 5 is used to fix the scale base 2 and the outer ring of the rolling bearing 3. It is ring-shaped and several first bolts 6 are set through the edge of the large pressure cap 5. The threaded end of the first bolt 6 is connected to the threaded hole reserved at the end of the scale base 2. By tightening the first bolt 6, the large pressure cap 5 can tightly fix the scale base 2 and the outer ring of the rolling bearing 3, ensuring the stability of the scale base 2 during rotation and avoiding the impact of loosening on the measurement results.

[0023] When using this tooling, firstly, the positioning sleeve 1 needs to be fitted onto the outside of the roller neck of the rotating shaft 10. After fitting, the inner end face of the cavity of the positioning sleeve 1 should fit tightly against the outer end face of the roller neck of the rotating shaft 10. Then, release the handle 21. Under the action of the rolling bearing 3, the handle 21 of the scale seat 2 will naturally droop. Then, the 0 mark end of the scale 8 should be abutted against the outer surface of the furnace body 9, and the scale 8 should be placed in the groove 22, as shown in the attached figure. Figure 3 As shown, the distance from the outer surface of the furnace body 9 to the edge of the handle 21 can be measured.

[0024] As operation continues, the rotating shaft 10 will expand axially due to high temperatures. Therefore, by measuring the axial thermal expansion of the rotating shaft 10 periodically according to the above procedure, the equipment and process personnel can accurately understand the equipment's status and make corresponding adjustments to the equipment and process parameters, effectively improving equipment design and process quality. This also reduces operational risks for personnel.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixture for measuring the axial thermal expansion of a rotating shaft, characterized in that, include: The positioning sleeve (1) is sleeved on the outside of the rotating shaft roller neck, and the outer end face of the rotating shaft roller neck is tightly fitted with the inner end face of the cavity of the positioning sleeve (1). The scale base (2) is rotatably connected to the outside of the positioning sleeve (1) via a rolling bearing (3), and a handle (21) is connected to the tail end of the scale base (2).

2. The axial thermal expansion measuring fixture for a rotating shaft according to claim 1, characterized in that, Also includes: The small pressure cap (4) is set between the positioning sleeve (1) and the inner ring of the rolling bearing (3) to fix the positioning sleeve (1) and the inner ring of the rolling bearing (3).

3. The axial thermal expansion measuring fixture for a rotating shaft according to claim 1, characterized in that, Also includes: The large pressure cap (5) is located between the scale base (2) and the outer ring of the rolling bearing (3) to fix the scale base (2) and the outer ring of the rolling bearing (3).

4. The axial thermal expansion measuring fixture for a rotating shaft according to claim 2, characterized in that, Also includes: The second bolt (7) passes through the small pressure cap (4), and its threaded end passes through the inner ring of the rolling bearing (3) and connects with the threaded hole reserved at the end of the positioning sleeve (1).

5. The axial thermal expansion measuring fixture for a rotating shaft according to claim 3, characterized in that, Also includes: The first bolt (6) passes through the edge of the large pressure cap (5), and its threaded end is connected to the threaded hole reserved at the end of the scale seat (2).

6. The axial thermal expansion measuring fixture for a rotating shaft according to claim 1, characterized in that, The handle (21) has symmetrical grooves (22) on both sides of its tail end. The grooves (22) are used to accommodate the ruler, and the width of the grooves (22) is matched with the width of the ruler.

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