External introduction value measuring device for steam turbine

Abstract

The embodiment of the invention provides an external introduction value measuring device for a steam turbine. The steam turbine comprises a bearing box, a high-pressure rotor pair wheel and a medium-pressure rotor pair wheel, wherein the bearing box is provided with opposite expansion support arms; the high-pressure rotor pair wheel and the medium-pressure rotor pair wheel are connected with each other and form a split; the external introduction value measuring device comprises a first measuring piece, a second measuring piece and a fixing assembly. The fixing assembly is used for fixing the first measuring piece on one side, facing the expansion support arm, of the high-pressure rotor pair wheel and enabling the first measuring piece to be parallel to a to-be-measured surface of the expansion support arm; the first end of the second measuring piece is arranged on the first measuring piece, and the second end is connected to the to-be-measured surface for measuring the distance between the to-be-measured surface and the first measuring piece; the sum of the distance between the to-be-measured surface and the first measuring piece, the thickness of the first measuring piece and the thickness of the high-pressure rotor coupling is an external value. Accurate external values can be obtained through the first measuring piece, the second measuring piece and the fixing assembly.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of external value measurement, and particularly relate to an external value measurement device for a steam turbine. Background Art

[0002] In the related art, the external reference value of the steam turbine is the distance from the center dividing plane of the high- and medium-pressure rotor pairs to the relative expansion arms. Since the center dividing plane of the high- and medium-pressure rotor pairs to the relative expansion arms are not in a parallel straight line and there is a lack of relevant measuring equipment 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 of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide an external value measuring device for a steam turbine.

[0004] An embodiment of the present disclosure provides an external value measurement device for a steam turbine, the steam turbine comprising a bearing housing having relatively expanded arms, a high-pressure rotor pair and an intermediate-pressure rotor pair connected to each other and forming a center dividing plane; the external value measurement device comprises a first measuring member, a second measuring member, and a fixing assembly;

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

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

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

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

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

[0010] Optionally, the fixing assembly comprises a clamping connector; the clamping connector comprises a connecting portion perpendicular to the mid-plane, a first clamping portion and a second clamping portion respectively bent and extending from both ends of the connecting portion;

[0011] The connecting portion is provided with a through hole running through the thickness direction thereof for passing the first measuring piece through; the first clamping portion and the second clamping portion are respectively oriented toward the medium-pressure rotor pair and the high-pressure rotor pair for clamping the first measuring piece.

[0012] Optionally, the fixing assembly further comprises a fastener, and the first clamping portion is provided with a threaded hole extending through the thickness direction thereof;

[0013] The fastener is passed through the threaded hole and abuts against the side of the intermediate pressure rotor wheel facing away from the expansion arm, so as to fasten the clamping connector.

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

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

[0016] The external value measuring device for a steam turbine according to the embodiment of the present disclosure can obtain accurate external value data through the provided first measuring piece, second measuring piece and fixing assembly, thereby improving the reliability and accuracy of the external value data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of an external value measuring device for a steam turbine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] like Figure 1 FIG. 1 shows an external-value measuring device 100 for a steam turbine. The steam turbine includes a bearing housing 110 having opposing expansion arms 111, and a high-pressure rotor pair 120 and an intermediate-pressure rotor pair 130 connected to each other and forming a center plane 200. The external-value measuring device 100 includes a first measuring member 140, a second measuring member 150, and a fixing assembly 160.

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

[0021] Specifically, if Figure 1 As shown, the first measuring member 140 is fixed to the upper surface of the high-pressure rotor wheel 120 via a fixing assembly 160. A portion of the first measuring member 140 is fixed to the upper surface of the high-pressure rotor wheel 120, while another portion thereof extends out of the high-pressure rotor wheel 120 and is used to support the second measuring member 150. The first end of the second measuring member 120 is located at the portion of the first measuring member 140 that extends out of the high-pressure rotor wheel 120. The second end of the second measuring member 120 is connected to the measured surface 112 of the expansion arm 111 to measure the distance between the measured surface 112 and the first measuring member 140.

[0022] It's easy to understand that the thicknesses of the second measuring member 140 and the high-pressure rotor counter-wheel 120 are both known, fixed values. Therefore, the distance between the measured surface 112 and the first measuring member 140 can be measured using the second measuring member 120. This distance, combined with the thicknesses of the first measuring member 140 and the high-pressure rotor counter-wheel 120, can yield the corresponding turbine's external draw value.

[0023] The disclosed embodiment of the steam turbine external-drain value measurement device utilizes a first measuring member, a second measuring member, and a fixed assembly to measure the distance between the measured surface and the first measuring member. This distance is then combined with the thickness of the first measuring member and the thickness of the high-pressure rotor counter-wheel to obtain the corresponding steam turbine external-drain value. The resulting external-drain value data is accurate, improving its reliability and accuracy.

[0024] For example, Figure 1 As shown, the surface to be measured 112 is provided with an external value measurement point 1121 , and the second end of the second measuring member 150 abuts against the external value measurement point 1121 .

[0025] Specifically, if Figure 1As shown, an external reference measurement point 1121 is provided on the measured surface 112. The first end of the second measuring member 150 is located at the portion of the first measuring member 140 that extends beyond the high-pressure rotor counter wheel 120, and the second end of the second measuring member 120 abuts against the external reference measurement point 1121. This allows for precise measurement of the distance between the external reference measurement point 1121 and the first measuring member 140.

[0026] Furthermore, the second measuring member 150 is perpendicular to the expansion arm 111 and the first measuring member 140 along the direction from the first end to the second end. In other words, the second measuring member 150 is perpendicular to the expansion arm 111 and the first measuring member 140, respectively. This allows the height distance between the expansion arm 111 and the first measuring member 140 to be accurately measured.

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

[0028] For example, Figure 1 As shown, the fixing assembly 160 includes a clamping connector. The clamping connector includes a connecting portion 161 perpendicular to the center plane 200, a first clamping portion 162 and a second clamping portion 163 extending from both ends of the connecting portion 161. The connecting portion 161 has a through hole extending through its thickness for inserting the first measuring member 140. The first clamping portion 162 and the second clamping portion 163 face the intermediate pressure rotor wheel pair 130 and the high pressure rotor wheel pair 120, respectively, to clamp the first measuring member 140.

[0029] Specifically, if Figure 1 As shown, 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 is perpendicular to the center dividing plane 200. The first clamping portion 162 is bent and extended from one end of the connecting portion 161 toward the intermediate-pressure rotor pair 130, and the second clamping portion 163 is bent and extended from the other end of the connecting portion 161 toward the high-pressure rotor pair 120. The first measuring piece 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 piece 140 is fixed to the high-pressure rotor pair 120 by a clamping connector. Such a setting can improve the clamping fixation of the first measuring piece, so that the first measuring piece is more stably fixed to the high-pressure rotor pair, so as to obtain more accurate external value measurement data.

[0030] For example, Figure 1As shown, the fixing assembly 160 further includes a fastener 164. The first clamping portion 162 has a threaded hole extending through its thickness. The fastener 164 is inserted through the threaded hole and abuts against the side of the intermediate pressure rotor wheel 130 facing away from the expansion arm 111 to fasten the clamping connector.

[0031] Specifically, if Figure 1 As shown, a threaded hole is opened in the first clamping portion 162 in the thickness direction thereof, and a fastener 164 is threadedly connected to the threaded hole. After the fastener 164 passes through the threaded hole, it abuts against the lower surface of the medium-pressure rotor wheel 130, thereby fastening the clamping connection, thereby better fixing the first measuring piece 140.

[0032] For example, Figure 1 As shown, the fixing assembly 160 further includes an elastic member 165 , which is sleeved on the second clamping portion 163 and abuts against the first measuring member 140 .

[0033] Specifically, if Figure 1 As shown, the elastic member 165 is sleeved around the second clamping portion 163 along the circumference of the second clamping portion 163. The elastic member 165 is in contact with the first measuring member 140 located on the high-pressure rotor counter-wheel 120. The provision of the elastic member 165 prevents direct contact between the second clamping portion 163 and the first measuring member 140, which could cause crushing damage to the first measuring member 140.

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

[0035] The disclosed embodiment of the steam turbine external-drain value measurement device utilizes a first measuring member, a second measuring member, and a fixed assembly to measure the distance between the external-drain value measurement point and the first measuring member. This distance is then added to the thickness of the first measuring member and the thickness of the high-pressure rotor counter-wheel to obtain the corresponding steam turbine external-drain value. The resulting external-drain value data is accurate, improving its reliability and accuracy.

[0036] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A device for measuring external value of a steam turbine, characterized in that: The steam turbine includes a bearing housing with relatively expanded arms, a pair of high-pressure rotor wheels and a pair of medium-pressure rotor wheels connected to each other and forming a center dividing plane; the external value measuring device includes a first measuring piece, a second measuring piece and a fixing assembly; The fixing assembly is used to fix the first measuring piece on the side of the high-pressure rotor wheel facing the expansion arm, and make the first measuring piece parallel to the surface to be measured of the expansion arm; the first end of the second measuring piece is provided on the first measuring piece, and the second end thereof is connected to the surface to be measured for measuring the distance between the surface to be measured and the first measuring piece; wherein, The sum of the distance between the surface to be measured and the first measuring piece, the thickness of the first measuring piece, and the thickness of the high-pressure rotor wheel pair is the external value.

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

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

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

5. The external value measuring device for a steam turbine according to any one of claims 1 to 4, characterized in that: The fixing assembly includes a clamping connector; the clamping connector includes a connecting portion perpendicular to the mid-plane, and a first clamping portion and a second clamping portion that are bent and extended from both ends of the connecting portion; The connecting portion is provided with a through hole running through the thickness direction thereof for passing the first measuring piece through; the first clamping portion and the second clamping portion are respectively oriented toward the medium-pressure rotor pair and the high-pressure rotor pair for clamping the first measuring piece.

6. The external value measuring device for a steam turbine according to claim 5, characterized in that: The fixing assembly further comprises a fastener, wherein the first clamping portion is provided with a threaded hole extending through the thickness thereof; The fastener is passed through the threaded hole and abuts against the side of the intermediate pressure rotor wheel facing away from the expansion arm, so as to fasten the clamping connector.

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

8. The external 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 member is a rubber ring.

Images