Steam seal clearance measuring device of steam turbine

Abstract

The utility model relates to the technical field of measuring equipment, and discloses a steam turbine steam seal clearance measuring device, which comprises a rotating plate, and a triangular reading block is fixedly connected to the right side of the upper surface of the rotating plate. According to the utility model, by arranging the triangular reading block, the center block, the first measuring pin, the rotating rod and the second measuring pin, an operator firstly attaches the first measuring pin and the second measuring pin to the same surface of a gap, and then rotates the rotating rod, so that the second measuring pin is contacted with the other surface of the gap; then, an operator reads the overall rotation angle of the rotating rod and calculates the moving distance data of the second measuring needle in the gap according to the distance between the first measuring needle and the second measuring needle, and the accurate data of the gap can be obtained after the radius of the first measuring needle and the radius of the second measuring needle are added to the data. The whole measurement process is simple in positioning and reliable in measurement precision, and the problem that the sealing performance of the steam seal is large in floating due to low measurement precision is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, and more specifically, the utility model relates to a steam turbine gland clearance measuring device. Background Technique

[0002] The gland, that is, the steam seal, is a device that plays a key role in steam power equipment. Its main function is to prevent steam leakage and ensure the efficient operation of steam in the system. The gland usually adopts special materials and designs to adapt to different working conditions and pressure requirements. In equipment such as steam turbines and steam engines, the performance of the gland directly affects the efficiency, reliability and safety of the equipment. A good gland design can effectively reduce steam leakage, reduce energy loss and improve the overall performance of the equipment.

[0003] When operators produce steam turbine glands, they often use clearance measuring devices to measure the clearance between two sealing pieces. However, in the actual use process of the existing clearance measuring devices, although they have basic spacing measuring functions, the existing clearance measuring devices have problems such as low measuring accuracy and difficult measuring positioning. Therefore, it needs to be improved. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a steam turbine gland clearance measuring device, which has the advantage of high measuring accuracy.

[0005] To achieve the above object, the utility model provides the following technical solution: A steam turbine gland clearance measuring device, including a rotating plate, a triangular reading block is fixedly connected to the right side of the upper surface of the rotating plate, a central block is movably connected to the middle of the upper surface of the rotating plate, a scale groove is opened on the outer surface of the central block, the bottom end of the central block penetrates through the rotating plate and extends to the lower side of the rotating plate and is fixedly connected with a first measuring needle, a rotating rod is movably sleeved on the outer surface of the first measuring needle, the upper surface of the rotating rod is fixedly connected with the lower surface of the rotating plate, and a second measuring needle is fixedly connected to the right end of the lower surface of the rotating rod. The diameters of the first measuring needle and the second measuring needle are the same.

[0006] As a preferred technical solution of the utility model, a limiting piece located below the rotating rod is threadedly sleeved on the outer surface of the first measuring needle, and the upper surface of the limiting piece is movably connected with the lower surface of the rotating rod.

[0007] As a preferred technical solution of the utility model, a connecting arm is fixedly connected to the upper surface of the central block, and a movable block is fixedly connected to the rear end of the connecting arm.

[0008] As a preferred technical solution of the present utility model, a limiting rod is movably sleeved on the upper surface of the movable block. The bottom end of the limiting rod penetrates through the movable block and extends below the movable block, and a fixed block is fixedly connected to the top end of the limiting rod.

[0009] As a preferred technical solution of the present utility model, a connecting plate is fixedly connected to the bottom end of the movable block, and a universal wheel is movably installed on the lower surface of the connecting plate.

[0010] As a preferred technical solution of the present utility model, a driving motor is fixedly installed on the rear side of the upper surface of the connecting plate, and a circular shaft is fixedly sleeved on the other end of the output shaft of the driving motor.

[0011] As a preferred technical solution of the present utility model, a first connecting rod is fixedly sleeved on the outer surface of the circular shaft. The other end of the first connecting rod is hinged to a second connecting rod, and the other end of the second connecting rod is hinged to the rear surface of the movable block.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. By setting a triangular reading block, a central block, a first measuring needle, a rotating rod and a second measuring needle, first, the operator makes both the first measuring needle and the second measuring needle fit on the same side of the gap, and then rotates the rotating rod to make the second measuring needle contact the other side of the gap. Then, the operator reads the angle through which the rotating rod rotates as a whole and calculates the distance data of the movement of the second measuring needle in the gap according to the distance between the first measuring needle and the second measuring needle. After adding the radii of the first measuring needle and the second measuring needle to this data, the accurate data of the gap can be obtained. The whole measuring process has simple positioning and reliable measuring accuracy, effectively avoiding the problem of large floating of the steam seal tightness performance caused by low measuring accuracy.

[0014] 2. By setting a connecting arm, a movable block, a limiting rod, a first connecting rod and a second connecting rod, when the driving motor runs, the circular shaft and the first connecting rod will start to rotate. The rotation of the first connecting rod will cause the other end of the first connecting rod to drive the second connecting rod, making the second connecting rod start to rotate. At the same time, the other end of the second connecting rod will drive the whole movable block, making the whole movable block start to move up and down under the limitation of the limiting rod. During this process, the connecting arm and the movable block ensure that the first measuring needle and the second measuring needle are always perpendicular to the ground, avoiding the problem that the whole rotating plate and the central block are prone to skew during manual use, resulting in unreliable measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the bottom of the present utility model;

[0017] Figure 3 is a schematic cross-sectional structure diagram of the present utility model;

[0018] Figure 4 is a schematic cross-sectional structure diagram of the side of the rotating rod of the present utility model;

[0019] Figure 5 is a schematic structure diagram of the scale groove of the present utility model.

[0020] In the figure: 1, rotating plate; 2, triangular reading block; 3, central block; 4, first measuring needle; 5, rotating rod; 6, second measuring needle; 7, scale groove; 8, connecting arm; 9, movable block; 10, limiting rod; 11, fixed block; 12, connecting plate; 13, driving motor; 14, round shaft; 15, first connecting rod; 16, second connecting rod; 17, universal wheel; 18, limiting piece. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figures 1 to 5 shown, the present utility model provides a steam turbine gland clearance measuring device, including a rotating plate 1. A triangular reading block 2 is fixedly connected to the right side of the upper surface of the rotating plate 1. A central block 3 is movably connected to the middle of the upper surface of the rotating plate 1. A scale groove 7 is provided on the outer surface of the central block 3. The bottom end of the central block 3 penetrates through the rotating plate 1 and extends below the rotating plate 1 and is fixedly connected to a first measuring needle 4. A rotating rod 5 is movably sleeved on the outer surface of the first measuring needle 4. The upper surface of the rotating rod 5 and the lower surface of the rotating plate 1 are fixedly connected. The right end of the lower surface of the rotating rod 5 is fixedly connected to a second measuring needle 6. The diameters of the first measuring needle 4 and the second measuring needle 6 are the same.

[0023] When the first measuring needle 4 abuts against one side of the clearance and the second measuring needle 6 rotates in the clearance, the design of the triangular reading block 2 and the scale groove 7 enables the operator to record the angle rotated by the rotating rod 5 and the second measuring needle 6. Substituting this angle and the distance between the first measuring needle 4 and the second measuring needle 6 into the trigonometric function formula can obtain the distance that the second measuring needle 6 moves in the clearance. Adding this distance to the radius lengths of the first measuring needle 4 and the second measuring needle 6 can obtain the accurate data of the clearance.

[0024] Among them, the outer surface of the first measuring needle 4 is threadedly sleeved with a limiting piece 18 located below the rotating rod 5, and the upper surface of the limiting piece 18 is movably connected to the lower surface of the rotating rod 5.

[0025] The design of the limiting piece 18 plays a role in preventing the rotating plate 1, the triangular reading block 2, the rotating rod 5, and the second measuring needle 6 from directly falling.

[0026] Among them, the upper surface of the central block 3 is fixedly connected with a connecting arm 8, and the rear end of the connecting arm 8 is fixedly connected with a movable block 9.

[0027] The design of the connecting arm 8 and the movable block 9 can ensure that the first measuring needle 4 is always perpendicular to the ground, thereby avoiding the problem of unreliable measurement reference caused by the inclination of the first measuring needle 4.

[0028] Among them, the upper surface of the movable block 9 is movably sleeved with a limiting rod 10. The bottom end of the limiting rod 10 penetrates through the movable block 9 and extends below the movable block 9, and the top end of the limiting rod 10 is fixedly connected with a fixed block 11.

[0029] The movable block 9, the connecting arm 8, and the central block 3 as a whole can move up and down along the outer surface of the movable block 9.

[0030] Among them, the bottom end of the movable block 9 is fixedly connected with a connecting plate 12, and the lower surface of the connecting plate 12 is movably installed with a universal wheel 17.

[0031] The design of the universal wheel 17 facilitates the operator to move the connecting plate 12 and the rotating plate 1 as a whole.

[0032] Among them, a driving motor 13 is fixedly installed on the rear side of the upper surface of the connecting plate 12, and the other end of the output shaft of the driving motor 13 is fixedly sleeved with a circular shaft 14.

[0033] When the driving motor 13 operates, the circular shaft 14 will start to rotate.

[0034] Among them, the outer surface of the circular shaft 14 is fixedly sleeved with a first connecting rod 15. The other end of the first connecting rod 15 is hinged with a second connecting rod 16, and the other end of the second connecting rod 16 is hinged with the rear surface of the movable block 9.

[0035] The rotation of the circular shaft 14 and the first connecting rod 15 will drive the second connecting rod 16 and cause the second connecting rod 16 to rotate. At this time, the other end of the second connecting rod 16 will drive the movable block 9 as a whole, causing the movable block 9 as a whole to start moving up and down.

[0036] The working principle and usage process of the present utility model:

[0037] First, the operator fixes the steam seal below the first measuring needle 4, and then starts the drive motor 13. As the drive motor 13 operates, the circular shaft 14 and the first connecting rod 15 will start to rotate. At this time, the second connecting rod 16 will start to rotate driven by the other end of the first connecting rod 15, and the other end of the second connecting rod 16 will drive the movable block 9 during this process, causing the whole movable block 9 to move downward along the outer surface of the limiting rod 10 until the first measuring needle 4 and the second measuring needle 6 enter between the two steam seal sheets.

[0038] Then, the operator makes both the first measuring needle 4 and the second measuring needle 6 fit against the same side of the gap between the two steam seal sheets, and then rotates the whole rotating rod 5 so that the second measuring needle 6 touches the other side of the gap. The angle through which the whole rotating rod 5 rotates during this process can be read out through the central block 3 and the triangular reading block 2. Substitute the angle and the distance between the first measuring needle 4 and the second measuring needle 6 into the trigonometric calculation formula and add the radii of the first measuring needle 4 and the second measuring needle 6, and then the accurate data of the distance between the two seal sheets can be obtained.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine gland clearance measuring device, comprising a rotating plate (1), characterized in that: On the right side of the upper surface of the rotating plate (1), a triangular reading block (2) is fixedly connected. In the middle of the upper surface of the rotating plate (1), a central block (3) is movably connected. A scale groove (7) is formed on the outer surface of the central block (3). The bottom end of the central block (3) penetrates through the rotating plate (1) and extends below the rotating plate (1) and is fixedly connected to a first measuring needle (4). A rotating rod (5) is movably sleeved on the outer surface of the first measuring needle (4). The upper surface of the rotating rod (5) is fixedly connected to the lower surface of the rotating plate (1). At the right end of the lower surface of the rotating rod (5), a second measuring needle (6) is fixedly connected. The first measuring needle (4) and the second measuring needle (6) have the same diameter.

2. The steam seal clearance measuring device for a steam turbine according to claim 1, characterized in that: A limiting piece (18) located below the rotating rod (5) is threadedly sleeved on the outer surface of the first measuring needle (4). The upper surface of the limiting piece (18) is movably connected to the lower surface of the rotating rod (5).

3. The steam seal clearance measuring device for a steam turbine according to claim 1, characterized in that: A connecting arm (8) is fixedly connected to the upper surface of the central block (3). A movable block (9) is fixedly connected to the rear end of the connecting arm (8).

4. A steam turbine gland clearance measuring device according to claim 3, characterized in that: A limiting rod (10) is movably sleeved on the upper surface of the movable block (9). The bottom end of the limiting rod (10) penetrates through the movable block (9) and extends below the movable block (9). The top end of the limiting rod (10) is fixedly connected to a fixed block (11).

5. The steam turbine gland clearance measuring device according to claim 3, characterized in that: A connecting plate (12) is fixedly connected to the bottom end of the movable block (9). A universal wheel (17) is movably installed on the lower surface of the connecting plate (12).

6. The steam turbine gland clearance measuring device according to claim 5, characterized in that: A driving motor (13) is fixedly installed on the rear side of the upper surface of the connecting plate (12). The other end of the output shaft of the driving motor (13) is fixedly sleeved with a circular shaft (14).

7. The steam turbine gland clearance measuring device according to claim 6, characterized in that: A first connecting rod (15) is fixedly sleeved on the outer surface of the circular shaft (14). The other end of the first connecting rod (15) is hinged to a second connecting rod (16). The other end of the second connecting rod (16) is hinged to the rear surface of the movable block (9).

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