Measurement tool for total length of uniform-section stator blade of large and medium-sized steam turbine

Abstract

The utility model discloses a large and medium-sized steam turbine uniform section stator blade total length measuring tool, which comprises a base, a positioning assembly, a profiling assembly, a detection sample plate and a bearing piece, and is characterized in that the positioning assembly is detachably mounted at a first end of the base, the profiling assembly is arranged at a second end of the base in a manner of being capable of reciprocating along a first direction, and the bearing piece is arranged on the base; the bearing part is arranged on the base, is located between the positioning assembly and the profiling assembly and is configured to bear a to-be-detected stationary blade; the positioning assembly is configured to limit the first end of the stationary blade to be detected. According to the total length measuring tool for the uniform-section stator blade of the large and medium-sized steam turbine, one end of the stator blade to be detected is positioned through the positioning assembly, the detection surface matched with the molded surface of the other end of the stator blade to be detected is adjusted through the profiling assembly, and then the total length of the stator blade to be detected is detected through the detection sample plate and the measuring tool. And the effect of high universality is achieved.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of steam turbine stationary blade measurement, in particular to a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections. Background Art

[0002] In the actual application of steam turbine products such as aviation and power generation, the total lengths of different models of stator blades are different, and the arc angles of the large and small heads are also different. The current commonly used measuring devices for detecting the total length of stator blades have poor versatility. A measuring tool can generally only be used to measure stator blades with the same arc angle but different lengths. When the shape of the stator blade changes, especially when the arc angles of the arc surfaces on both sides of the stator blade change, the existing measuring tool cannot accurately measure the total length of the stator blade, resulting in inaccurate measurement values. If the total length of stator blades with different arc surfaces is to be measured, it is necessary to redesign and manufacture another device that matches the shape of the stator blade, which is time-consuming and labor-intensive. Therefore, a total length measuring tool for stator blades with equal cross-sections of large and medium-sized steam turbines is needed to solve the problem of poor versatility in distance measurement. Utility Model Content

[0003] In order to solve the related technical problems, the utility model provides a total length measuring tool for large and medium-sized steam turbine static blades with equal cross-sections, so as to solve the problem of low versatility of the measuring tool.

[0004] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0005] A measuring tool for the total length of large and medium-sized steam turbine stator blades with equal cross-sections, comprising a base, a positioning assembly, a profiling assembly, a detection template and a bearing member, wherein:

[0006] The positioning assembly is detachably mounted on a first end of the base, the profiling assembly is reciprocally movable along a first direction and is disposed at a second end of the base, the bearing member is disposed on the base and is located between the positioning assembly and the profiling assembly, and the bearing member is configured to carry a stationary blade to be inspected;

[0007] The positioning assembly includes a first support seat and a positioning member, the first support seat is arranged on the base, the positioning member is detachably mounted on the first support seat, and the positioning member is configured to limit the first end of the stationary blade to be detected;

[0008] The contour-matching assembly includes a second support seat and an elastic member. The second support seat can be reciprocatingly arranged on the base along the first direction. The elastic member is detachably mounted on one side of the second support seat. The elastic member extends along the second direction. An adjusting member is mounted on the second support seat. The adjusting member is configured to adjust the curvature of the elastic member so that the elastic member has a detection surface that matches the profile of the second end of the stationary blade to be inspected. During inspection, the inspection template is abutted against the detection surface of the elastic member and slides along the second direction, so that the distance between the preset detection point at the second end of the stationary blade to be inspected and the inspection template is measured by a measuring tool.

[0009] Optionally, a slot is provided on the first support seat, the bottom of the positioning member is engaged in the slot, and the top of the positioning member is provided with a limiting surface adapted to the profile of the first end of the stationary blade to be detected.

[0010] Optionally, reinforcement members are symmetrically arranged on both sides of the positioning member in the first direction, and the reinforcement members are configured to strengthen the supporting force of the positioning member.

[0011] Optionally, the elastic member is arranged on a side of the second support seat away from the bearing member, the first end of the elastic member is arranged at the first end of the second support seat along the second direction, the second end of the elastic member is arranged at the second end of the second support seat along the second direction, an adjustment block is arranged at one end of the elastic member, the adjustment block is located between the elastic member and the second support seat, the adjustment block is configured to adjust the fixed position of one end of the elastic member, a fixing block is arranged at each end of the elastic member, a first fastener is arranged on the fixing block, the tail end of the first fastener is threadedly connected to the second support seat, and the first fastener is configured to fix the elastic member on the second support seat.

[0012] Optionally, at least one adjusting member is provided on the side of the second support seat close to the bearing member, and the adjusting member includes a second fastener and an adjusting block. The second fastener is rotatably arranged on the side of the second support seat close to the bearing member, the tail end of the second fastener is threadedly connected to the adjusting block, and the fixed end of the adjusting block is connected to the elastic member. The adjusting member is configured to drive the adjusting block to reciprocate in a first direction to adjust the curvature of the elastic member.

[0013] Optionally, a notch is provided at the bottom of one side of the detection sample, the horizontal surface of the notch abuts against the top end surface of the second support seat, and the vertical surface of the notch abuts against the elastic member, and the detection sample reciprocates along the second direction.

[0014] Optionally, a guide rail is arranged on the base along the first direction, and mounting grooves are symmetrically arranged on both sides of the guide rail. The bottoms of the first support seat and the second support seat are provided with first sliding grooves corresponding to the guide rails. The first support seat and the second support seat are respectively arranged on the mounting grooves on both sides at both ends of the second direction, and the first support seat and the second support seat are adjustably connected to the mounting grooves through a third fastener.

[0015] Optionally, a second slide groove is provided at the bottom of the carrier corresponding to the guide rail, and a mounting hole is provided at a preset position of the carrier on the guide rail. A fourth fastener is rotatably provided in the mounting hole, and the tail end of the fourth fastener abuts against the top end surface of the second slide groove to fix the carrier on the base.

[0016] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model provides a large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool with the following beneficial effects:

[0017] 1. Use the positioning component to locate one end of the stator blade to be tested, use the profiling component to adjust the detection surface that matches the profile of the other end of the stator blade to be tested, and then use the detection template and measuring tools to detect the total length of the stator blade to be tested, which has a high universal effect;

[0018] 2. The positioning piece is installed on the first support seat by means of a snap connection, which has a simple structure, is easy to use, and improves installation efficiency;

[0019] 3. The provision of the guide rail and the first slide groove improves the stability of the profiling component when it moves on the base, and improves the accuracy of measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a base in a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a first support seat in a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0026] Figure 6 It is a structural schematic diagram of a second support seat in a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections provided by an embodiment of the utility model;

[0027] Figure 7 The utility model is a schematic diagram of the structure of an elastic part in a total length measuring tool for large and medium-sized steam turbine static blades with equal cross-sections provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings. The preferred embodiments of the utility model are given in the drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thoroughly understood. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on another component or there can also be a central component. When a component is considered to be "connected" to another component, it can be directly connected to another component or there may be a central component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] See also Figures 1 to 7As shown, this embodiment provides a total length measuring tool for large and medium-sized steam turbine stationary blades with equal cross-sections, which includes a base 1, a positioning component 2, a profiling component 3, a detection template 4 and a bearing member 5, wherein the positioning component 2 is detachably mounted on a first end of the base 1, the profiling component 3 is reciprocatably disposed on a second end of the base 1 along a first direction, the bearing member 5 is disposed on the base 1 and is located between the positioning component 2 and the profiling component 3, and the bearing member 5 is configured to carry the stationary blade 6 to be detected; the positioning component 2 includes a first support seat 21 and a positioning member 22, the first support seat 21 is disposed on the base 1, the positioning member 22 is detachably mounted on the first support seat 21, and the positioning member 22 is configured to be the stationary blade 6 to be detected The first end is limited; the profiling component 3 includes a second support seat 31 and an elastic member 32. The second support seat 31 can be reciprocatingly arranged on the base 1 along the first direction. The elastic member 32 is detachably mounted on one side of the second support seat 31. The elastic member 32 extends along the second direction. An adjusting member 33 is mounted on the second support seat 31. The adjusting member 33 is configured to adjust the curvature of the elastic member 32 so that the elastic member 32 has a detection surface that matches the profile of the second end of the stationary blade 6 to be detected. During detection, the detection template 4 is abutted against the detection surface of the elastic member 32 and slides along the second direction, so as to measure the distance between the preset detection point of the second end of the stationary blade 6 to be detected and the detection template 4 through a measuring tool.

[0031] Specifically, the first direction is the length direction of the base 1 , and the second direction is the width direction of the base 1 , and the first direction and the second direction are perpendicular to each other.

[0032] It can be seen that the first end of the stationary blade 6 to be tested is positioned by the positioning component 2, the elastic member 32 is adjusted to a testing surface that is compatible with the other end profile of the stationary blade 6 to be tested by the adjusting member 33, and then the total length of the stationary blade 6 to be tested is tested by the testing template 4 and the measuring tool. The invention has a wide range of applications and high versatility.

[0033] As an implementation mode, a slot 211 is provided on the first support seat 21 , the bottom of the positioning member 22 is engaged in the slot 211 , and the top of the positioning member 22 is provided with a limiting surface adapted to the profile of the first end of the stationary blade 6 to be detected.

[0034] It can be seen that the positioning member 22 is installed on the first support seat 21 by means of a snap-fitting method, which has a simple structure, is easy to use, and improves installation efficiency.

[0035] As an implementation manner, reinforcement members 221 are symmetrically arranged on both sides of the positioning member 22 in the first direction, and the reinforcement members 221 are configured to strengthen the supporting force of the positioning member 22 .

[0036] It can be seen that the arrangement of the reinforcement member 221 improves the stability of the installation of the positioning member 22, thereby avoiding deformation when the positioning member 22 abuts against the first end of the stationary blade 6 to be detected, thereby preventing measurement errors.

[0037] As an embodiment, the elastic member 32 is arranged on a side of the second support seat 31 away from the bearing member 5, the first end of the elastic member 32 is arranged at the first end of the second support seat 31 along the second direction, the second end of the elastic member 32 is arranged at the second end of the second support seat 31 along the second direction, an adjustment block 34 is arranged at one end of the elastic member 32, the adjustment block 34 is located between the elastic member 32 and the second support seat 31, the adjustment block 34 is configured to adjust the fixed position of one end of the elastic member 32, a fixing block 35 is respectively arranged at both ends of the elastic member 32, a first fastener 36 is arranged on the fixing block 35, the tail end of the first fastener 36 is threadedly connected to the second support seat 31, and the first fastener 36 is configured to fix the elastic member 32 on the second support seat 31.

[0038] It can be seen that the elastic member 32 is fixed on the second support seat 31 by the fixing block 35, so that the adjusting member 33 can adjust the elastic member 32. An adjusting block 34 is arranged at one end of the elastic member 32. The adjusting block 34 increases the curvature adjustment range of the elastic member 32. The structure is simple and the application range is wide.

[0039] As an embodiment, at least one adjusting member 33 is provided on the side of the second support seat 31 close to the carrier 5, and the adjusting member 33 includes a second fastener 331 and an adjusting block 332. The second fastener 331 is rotatably penetrated on the side of the second support seat 31 close to the carrier 5, the tail end of the second fastener 331 is threadedly connected to the adjusting block 332, and the fixed end of the adjusting block 332 is connected to the elastic member 32. The adjusting member 33 is configured to drive the adjusting block 332 to reciprocate in a first direction to adjust the curvature of the elastic member 32.

[0040] It can be seen that the second fastener 331 is passed through the side of the second support seat 31 close to the carrier 5 along the first direction, and is connected to the elastic member 32 through the adjustment block 332. The second fastener 331 is rotated to make the adjustment block 332 reciprocate in the first direction to adjust the curvature of the elastic member 32. The structure is simple and easy to operate.

[0041] As an implementation mode, a notch is provided at the bottom of one side of the detection sample 4, the horizontal surface of the notch abuts against the top end surface of the second support seat 31, and the vertical surface of the notch abuts against the elastic member 32, and the detection sample 4 reciprocates along the second direction.

[0042] It can be seen that the horizontal plane and the vertical plane are respectively abutted against the second support seat 31 and the elastic member 32, which has a simple structure, is easy to operate, and improves the detection efficiency.

[0043] As an embodiment, a guide rail 11 is arranged on the base 1 along the first direction, and mounting grooves 12 are symmetrically arranged on both sides of the guide rail 11. The bottoms of the first support seat 21 and the second support seat 31 are respectively provided with first sliding grooves 13 corresponding to the guide rail 11. The first support seat 21 and the second support seat 31 are respectively arranged on the mounting grooves 12 on both sides at both ends of the second direction, and the first support seat 21 and the second support seat 31 are adjustably connected to the mounting grooves 12 through a third fastener 14.

[0044] It can be seen that, by providing the guide rail 11 and the first slide groove 13 , the stability of the profiling component 3 when moving on the base 1 is improved, and the accuracy of the measurement is improved.

[0045] As an embodiment, a second slide groove 15 is provided at the bottom of the supporting member 5 corresponding to the guide rail 11, and a mounting hole is provided at a preset position of the supporting member 5 on the guide rail 11, and a fourth fastener 16 is rotatably provided in the mounting hole, and the tail end of the fourth fastener 16 abuts against the top end surface of the second slide groove 15 to fix the supporting member 5 on the base 1.

[0046] It can be seen that the bearing member 5 slides or is fixed on the base 1 through the guide rail 11, the second slide groove 15 and the fourth fastener 16, and the structure is simple and easy to operate.

[0047] The specific working principle of the above-mentioned six-blade total length measuring tool for large and medium-sized steam turbine with equal cross-section is as follows:

[0048] S1. placing the stationary blade 6 to be inspected on the carrier 5;

[0049] S2, fix the first support seat 21, place the first end of the stationary blade 6 to be detected on the first support seat 21 and abut against the limit surface, slide the second support seat 31 to the second end of the stationary blade 6 to be detected, and place the second end of the stationary blade 6 to be detected on the second support seat 31;

[0050] S3, the rotating adjusting member 33 drives the adjusting block 332 to cause the elastic member 32 to deform, until the elastic member 32 forms a detection surface that matches the profile of the second end of the stationary blade 6 to be detected;

[0051] S4, sliding the detection template 4 along the detection surface to a preset position to be detected, and measuring the distance between the vertical surface of the detection template 4 close to the stationary blade 6 to be detected and the first end of the stationary blade 6 to be detected by a measuring tool to obtain a value a;

[0052] S5, using a measuring tool to detect the distance from the first end of the first support base 21 to the first end of the second support base 31 to obtain a value b;

[0053] S6. Calculate a+b to obtain the total length of the stationary blade 6 to be tested.

[0054] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0055] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A measuring tool for the total length of large and medium-sized steam turbine stator blades with equal cross-section, characterized in that: The total length measuring tool of large and medium-sized steam turbine static blades with equal cross-sections comprises a base, a positioning component, a profiling component, a detection template and a bearing member, wherein: The positioning assembly is detachably mounted on a first end of the base, the profiling assembly is reciprocatably disposed on a second end of the base along a first direction, the bearing member is disposed on the base and is located between the positioning assembly and the profiling assembly, and the bearing member is configured to carry a stationary blade to be inspected; The positioning assembly includes a first support seat and a positioning member, wherein the first support seat is arranged on the base, the positioning member is detachably mounted on the first support seat, and the positioning member is configured to limit the first end of the stationary blade to be detected; The contour assembly includes a second support seat and an elastic member, the second support seat can be reciprocatingly arranged on the base along the first direction, the elastic member can be detachably installed on one side of the second support seat, the elastic member extends along the second direction, and an adjusting member is installed on the second support seat, the adjusting member is configured to adjust the curvature of the elastic member so that the elastic member has a detection surface that matches the profile of the second end of the stationary blade to be inspected. During inspection, the inspection template is abutted against the detection surface of the elastic member and slides along the second direction, so that the distance between the preset detection point of the second end of the stationary blade to be inspected and the inspection template is measured by a measuring tool.

2. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 1, characterized in that: The first support seat is provided with a slot, the bottom of the positioning member is engaged in the slot, and the top of the positioning member is provided with a limiting surface adapted to the profile of the first end of the stationary blade to be detected.

3. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 2, characterized in that: Reinforcements are symmetrically arranged on both sides of the positioning member in the first direction, and the reinforcements are configured to strengthen the supporting force of the positioning member.

4. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 1, characterized in that: The elastic member is arranged on a side of the second support seat away from the bearing member, the first end of the elastic member is arranged on the first end of the second support seat along the second direction, the second end of the elastic member is arranged on the second end of the second support seat along the second direction, an adjustment block is arranged at one end of the elastic member, the adjustment block is located between the elastic member and the second support seat, the adjustment block is configured to adjust the fixed position of one end of the elastic member, a fixing block is arranged at each of the two ends of the elastic member, a first fastener is arranged on the fixing block, the tail end of the first fastener is threadedly connected to the second support seat, and the first fastener is configured to fix the elastic member on the second support seat.

5. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 4, characterized in that: At least one adjusting member is provided on a side of the second supporting seat close to the bearing member, and the adjusting member includes a second fastener and an adjusting block. The second fastener is rotatably arranged on a side of the second supporting seat close to the bearing member, the tail end of the second fastener is threadedly connected to the adjusting block, and the fixed end of the adjusting block is connected to the elastic member. The adjusting member is configured to drive the adjusting block to reciprocate in the first direction to adjust the curvature of the elastic member.

6. A measuring tool for the total length of large and medium-sized steam turbine stator blades with constant cross-section according to claim 5, characterized in that: A notch is provided at the bottom of one side of the detection sample, the horizontal surface of the notch abuts against the top end surface of the second support seat, and the vertical surface of the notch abuts against the elastic member, and the detection sample reciprocates along the second direction.

7. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 1, characterized in that: A guide rail is arranged on the base along the first direction, and mounting grooves are symmetrically arranged on both sides of the guide rail. The bottoms of the first support seat and the second support seat are both provided with first sliding grooves corresponding to the guide rails. The first support seat and the second support seat are respectively arranged on the mounting grooves on both sides at both ends of the second direction, and the first support seat and the second support seat are adjustably connected to the mounting grooves through third fasteners.

8. A large and medium-sized steam turbine uniform cross-section stator blade total length measuring tool according to claim 7, characterized in that: A second slide groove is provided at the bottom of the supporting member corresponding to the guide rail, and a mounting hole is provided at a preset position on the guide rail. A fourth fastener is rotatably provided in the mounting hole, and the tail end of the fourth fastener abuts against the top end surface of the second slide groove to fix the supporting member on the base.

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