External lead value measurement device for steam turbine

Abstract

An external lead value measurement device (100) for a steam turbine. The steam turbine comprises a bearing housing (110), which has a relative expansion support arm (111), and a high-pressure rotor coupling (120) and an intermediate-pressure rotor coupling (130), which are connected to each other and form a split plane (200). The external lead value measurement device (100) comprises a first measurement member (140), a second measurement member (150) and a fixing assembly (160), wherein the fixing assembly (160) is configured to fix the first measurement member (140) to the side of the high-pressure rotor coupling (120) facing the expansion support arm (111) and enable the first measurement member (140) to be parallel to a surface (112) to be subjected to measurement of the expansion support arm (111); a first end of the second measurement member (150) is arranged on the first measurement member (140), and a second end of the second measurement member (150) is connected to said surface (112) to measure the distance between said surface (112) and the first measurement member (140); and the sum of the distance between said surface (112) and the first measurement member (140), the thickness of the first measurement member (140) and the thickness of the high-pressure rotor coupling (120) is an external lead value. By means of the first measurement member (140), the second measurement member (150) and the fixing assembly (160) that are provided, an accurate external lead value can be obtained.

Description

An external reference value measuring device for steam turbines Technical Field

[0001] The embodiments disclosed herein belong to the field of external reference value measurement technology, specifically relating to an external reference value measurement device for a steam turbine. Background Technology

[0002] In related technologies, the external reference value of a steam turbine is the distance from the midpoint of the high-pressure and intermediate-pressure rotor pairs to the relative expansion arm. Since the midpoint of the high-pressure and intermediate-pressure rotor pairs to the relative expansion arm are not on a parallel straight line, and there is a lack of relevant measuring devices for measurement, the external reference value is prone to large errors and the measurement is not accurate enough. Summary of the Invention

[0003] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide an external reference value measuring device for steam turbines.

[0004] Embodiments of this disclosure provide an external reference value measuring device for a steam turbine, the steam turbine including a bearing housing with relatively expanded support arms, a high-pressure rotor pair and a medium-pressure rotor pair connected to each other and forming a split surface; the external reference value measuring device includes a first measuring element, a second measuring element and a fixing assembly;

[0005] The fixing assembly is used to fix the first measuring element to the side of the high-pressure rotor wheel facing the expansion arm, and to make the first measuring element parallel to the test surface of the expansion arm; the first end of the second measuring element is disposed on the first measuring element, and its second end is connected to the test surface for measuring the distance between the test surface and the first measuring element; wherein,

[0006] The sum of the distance between the surface to be measured and the first measuring element, the thickness of the first measuring element, and the thickness of the high-pressure rotor coupling is the external reference value.

[0007] Optionally, the surface to be measured is provided with an external value measurement point, and the second end of the second measuring element abuts against the external value measurement point.

[0008] Optionally, the second measuring element is perpendicular to the expansion arm and the first measuring element respectively along the direction from its first end to its second end.

[0009] Optionally, the first measuring element is a square, and the second measuring element is a micrometer.

[0010] Optionally, the fixing component includes a clamping connector; the clamping connector includes a connecting portion perpendicular to the split surface, a first clamping portion and a second clamping portion that are respectively bent and extended from both ends of the connecting portion;

[0011] The connecting part has a through hole extending through its thickness direction for inserting the first measuring element; the first clamping part and the second clamping part are respectively facing the medium-pressure rotor pair and the high-pressure rotor pair to clamp the first measuring element.

[0012] Optionally, the fixing component further includes a fastener, and the first clamping portion has a threaded hole extending through its thickness direction;

[0013] The fastener passes through the threaded hole and abuts against the side of the medium-pressure rotor pair away from the expansion arm, in order to secure the clamping connector.

[0014] Optionally, the fixing component further includes an elastic element, which is sleeved on the second clamping portion and abuts against the first measuring element.

[0015] Optionally, the clamping connector is an angle steel, the fastener is a tightening screw, and the elastic element is a rubber ring.

[0016] The external reference value measuring device for steam turbines disclosed herein can obtain accurate external reference value data through the provided first measuring element, second measuring element and fixing component, thereby improving the reliability and accuracy of the external reference value data. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of an external reference value measuring device for a steam turbine according to an embodiment of the present disclosure. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] As shown in Figure 1, an external value measuring device 100 for a steam turbine includes a bearing housing 110 with opposing expansion arms 111, a high-pressure rotor pair 120 and a medium-pressure rotor pair 130 connected to each other and forming a split surface 200. The external value measuring device 100 includes a first measuring element 140, a second measuring element 150, and a fixing assembly 160.

[0020] The fixing assembly 160 is used to fix the first measuring element 140 to the side of the high-pressure rotor coupling 120 facing the expansion arm 111, and to make the first measuring element 140 parallel to the test surface 112 of the expansion arm 111. The first end of the second measuring element 150 is disposed on the first measuring element 140, and its second end is connected to the test surface 112 for measuring the distance between the test surface 112 and the first measuring element 140. The sum of the distance between the test surface 112 and the first measuring element 140, the thickness of the first measuring element 140, and the thickness of the high-pressure rotor coupling 120 is the external reference value.

[0021] Specifically, as shown in Figure 1, the first measuring element 140 is fixed to the upper surface of the high-pressure rotor pair 120 by the fixing assembly 160. A portion of the first measuring element 140 is fixed to the upper surface of the high-pressure rotor pair 120, while another portion extends out of the high-pressure rotor pair 120 and serves to support the second measuring element 150. The first end of the second measuring element 120 is located at the portion of the first measuring element 140 that extends out of the high-pressure rotor pair 120, and the second end of the second measuring element 120 is connected to the test surface 112 of the expansion arm 111 to measure the distance between the test surface 112 and the first measuring element 140.

[0022] It is easy to understand that the thickness of the second measuring element 140 and the thickness of the high-pressure rotor coupling 120 are both known fixed thickness values. Therefore, it is only necessary to measure the distance between the surface to be measured 112 and the first measuring element 140 using the second measuring element 120, and then add this distance to the thickness of the first measuring element 140 and the thickness of the high-pressure rotor coupling 120 to obtain the corresponding external values ​​of the steam turbine.

[0023] The external reference value measuring device for a steam turbine according to embodiments of this disclosure can measure the distance between the surface to be measured and the first measuring element through the provided first measuring element, second measuring element, and fixing assembly. The corresponding external reference value of the steam turbine can be obtained by adding this distance to the thickness of the first measuring element and the thickness of the high-pressure rotor coupling. The obtained external reference value data is accurate, which helps to improve the reliability and accuracy of the external reference value data.

[0024] For example, as shown in FIG1, the surface to be measured 112 is provided with an external value measurement point 1121, and the second end of the second measuring element 150 abuts against the external value measurement point 1121.

[0025] Specifically, as shown in Figure 1, an external value measurement point 1121 is provided on the surface to be measured 112. The first end of the second measuring element 150 is located at the part of the first measuring element 140 that extends out of the high-pressure rotor coupling 120, and the second end of the second measuring element 120 abuts against the external value measurement point 1121. In this way, the distance between the external value measurement point 1121 and the first measuring element 140 can be accurately measured.

[0026] Furthermore, the second measuring element 150 is perpendicular to both the expansion arm 111 and the first measuring element 140 along the direction from its first end to its second end. That is, the second measuring element 150 is perpendicular to both the expansion arm 111 and the first measuring element 140, thus enabling accurate measurement of the height distance between the expansion arm 111 and the first measuring element 140.

[0027] For example, as shown in Figure 1, the first measuring element 140 is a square, and the second measuring element 150 is a micrometer. Specifically, as an application example, the first measuring element 140 can be set to a 0° to 50° square, and the second measuring element 150 can be an outside micrometer.

[0028] For example, as shown in FIG1, the fixing assembly 160 includes a clamping connector. The clamping connector includes a connecting portion 161 perpendicular to the split surface 200, and a first clamping portion 162 and a second clamping portion 163 extending from both ends of the connecting portion 161, respectively. The connecting portion 161 has a through hole extending through its thickness direction for the first measuring member 140 to pass through. The first clamping portion 162 and the second clamping portion 163 face the intermediate pressure rotor pair 130 and the high pressure rotor pair 120, respectively, to clamp the first measuring member 140.

[0029] Specifically, as shown in Figure 1, the connecting portion 161 is parallel to the left end faces of the high-pressure rotor pair 120 and the intermediate-pressure rotor pair 130, and perpendicular to the dividing plane 200. A first clamping portion 162 extends from one end of the connecting portion 161 toward the intermediate-pressure rotor pair 130, and a second clamping portion 163 extends from the other end of the connecting portion 161 toward the high-pressure rotor pair 120. A first measuring element 140 passes through the through hole of the connecting portion 161 and is pressed onto the upper surface of the high-pressure rotor pair 120. The first measuring element 140 is fixed to the high-pressure rotor pair 120 by a clamping connector. This arrangement improves the clamping and fixing of the first measuring element, making it more stably fixed to the high-pressure rotor pair, thus obtaining more accurate external measurement data.

[0030] For example, as shown in FIG1, the fixing assembly 160 further includes a fastener 164, and the first clamping portion 162 has a threaded hole extending through its thickness direction. The fastener 164 passes through the threaded hole and abuts against the side of the intermediate pressure rotor coupling 130 opposite to the expansion arm 111, for fastening the clamping connector.

[0031] Specifically, as shown in Figure 1, a threaded hole is provided in the first clamping part 162 through its thickness direction. A fastener 164 is threadedly connected to the threaded hole, and the fastener 164 passes through the threaded hole and abuts against the lower surface of the intermediate pressure rotor coupling 130 to fasten the clamping connector, thereby better fixing the first measuring piece 140.

[0032] For example, as shown in FIG1, the fixing component 160 further includes an elastic element 165, which is sleeved on the second clamping part 163 and abuts against the first measuring element 140.

[0033] Specifically, as shown in Figure 1, the elastic element 165 is sleeved around the second clamping part 163 in the circumferential direction, and the elastic element 165 is in contact with the first measuring element 140 located on the high-pressure rotor coupling 120. The elastic element 165 prevents direct contact between the second clamping part 163 and the first measuring element 140, thus avoiding crushing damage to the first measuring element 140.

[0034] As a specific example, as shown in Figure 1, the clamping connector can be set as an angle steel, the fastener 164 can be set as a tightening screw, and the elastic element 165 can be set as a rubber ring.

[0035] The external reference value measuring device for a steam turbine according to embodiments of this disclosure can measure the distance between the external reference value measuring point and the first measuring element through the provided first measuring element, second measuring element, and fixing assembly. The corresponding external reference value of the steam turbine can be obtained by adding this distance to the thickness of the first measuring element and the thickness of the high-pressure rotor coupling. The obtained external reference value data is accurate, which helps to improve the reliability and accuracy of the external reference value data.

[0036] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A device for measuring external input values ​​of a steam turbine, characterized in that, The turbine includes a bearing housing with relatively expanded support arms, a high-pressure rotor pair and a medium-pressure rotor pair connected to each other and forming a split surface; the external value measuring device includes a first measuring element, a second measuring element and a fixing assembly; The fixing assembly is used to fix the first measuring element to the side of the high-pressure rotor wheel facing the expansion arm, and to make the first measuring element parallel to the test surface of the expansion arm; the first end of the second measuring element is disposed on the first measuring element, and its second end is connected to the test surface for measuring the distance between the test surface and the first measuring element; wherein, The sum of the distance between the surface to be measured and the first measuring element, the thickness of the first measuring element, and the thickness of the high-pressure rotor coupling is the external reference value.

2. The external reference value measuring device for a steam turbine according to claim 1, characterized in that, The surface to be tested is provided with an external value measurement point, and the second end of the second measuring element abuts against the external value measurement point.

3. The external reference value measuring device for a steam turbine according to claim 1, characterized in that, The second measuring element is perpendicular to the expansion arm and the first measuring element in the direction from its first end to its second end.

4. The external reference value measuring device for a steam turbine according to claim 1, characterized in that, The first measuring component is a square, and the second measuring component is a micrometer.

5. The external reference value measuring device for a steam turbine according to any one of claims 1 to 4, characterized in that, The fixing component includes a clamping connector; the clamping connector includes a connecting portion perpendicular to the split surface, a first clamping portion and a second clamping portion that are bent and extended from both ends of the connecting portion respectively. The connecting part has a through hole extending through its thickness direction for inserting the first measuring element; the first clamping part and the second clamping part are respectively facing the medium-pressure rotor pair and the high-pressure rotor pair to clamp the first measuring element.

6. The external reference value measuring device for a steam turbine according to claim 5, characterized in that, The fixing component also includes a fastener, and the first clamping part has a threaded hole that extends through its thickness direction; The fastener passes through the threaded hole and abuts against the side of the medium-pressure rotor pair away from the expansion arm, in order to secure the clamping connector.

7. The external reference value measuring device for a steam turbine according to claim 6, characterized in that, The fixing component further includes an elastic element, which is sleeved on the second clamping part and abuts against the first measuring element.

8. The external reference value measuring device for a steam turbine according to claim 7, characterized in that, The clamping connector is an angle steel, the fastener is a tightening screw, and the elastic element is a rubber ring.

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