Detection device

Abstract

The embodiment of the utility model provides a detection device used for centering detection of a small machine side coupler and a pump side coupler, the detection device comprises a support, the support comprises a dummy shaft and a flange plate, the dummy shaft is fixed on the small machine side coupler, and the flange plate is fixed at one end, far away from the small machine side coupler, of the dummy shaft; and the dial indicator is movably arranged on the flange plate of the bracket so as to detect the excircle deviation and / or the end face deviation of the pump side coupler relative to the small machine side coupler. According to the detection device provided by the embodiment of the invention, the dial indicator is fixed on the flange plate of the bracket, so that the centering detection precision of the small machine side coupler and the pump side coupler can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of power equipment, and particularly to a detection device. Background Art

[0002] The feed water pump is the largest auxiliary machine in a power plant, and the level of its energy consumption has a great impact on the efficiency of the power plant. Especially for supercritical units, the operational reliability and economy of the pump set are particularly important. In a thermal power plant, the alignment between the coupling of the steam-driven feed water pump and the small steam turbine is a key link to ensure the stable operation of the unit, reduce vibration and energy consumption.

[0003] Traditional alignment measurement schemes have problems such as complex operation, long time consumption, and difficulty in ensuring accuracy, which easily lead to failures of the unit due to misalignment, affecting power generation efficiency and safety. Utility Model Content

[0004] The main purpose of the embodiments of the present application is to provide a detection device, which can improve the accuracy of the alignment detection of the coupling on the small turbine side and the coupling on the pump side by fixing the dial indicator on the flange of the bracket.

[0005] To achieve the above object, the embodiments of the present application propose a detection device for the alignment detection of the coupling on the small turbine side and the coupling on the pump side. The detection device includes:

[0006] A bracket, the bracket includes a dummy shaft and a flange. The dummy shaft is fixed on the coupling on the small turbine side, and the flange is fixed at one end of the dummy shaft away from the coupling on the small turbine side; and

[0007] A dial indicator, movably installed on the flange of the bracket, and abutted against the outer peripheral surface and / or end surface of the coupling on the pump side to detect the outer circle deviation and / or end face deviation of the coupling on the pump side relative to the coupling on the small turbine side.

[0008] Further, it further includes a magnetic base and a connecting rod. The magnetic base is movably magnetically adsorbed on the flange of the bracket, and the dial indicator is movably connected to the magnetic base through the connecting rod.

[0009] Further, the connecting rod includes a first connecting rod and a second connecting rod. The first connecting rod is movably connected to the magnetic base, the first connecting rod is movably connected to the second connecting rod, and the dial indicator is movably connected to the second connecting rod.

[0010] Further, the dial indicator includes an outer circle dial indicator and an end face dial indicator. The outer circle dial indicator abuts against the outer peripheral surface of the coupling on the pump side, and the end face dial indicator abuts against the end face of the coupling on the pump side facing the coupling on the small turbine side.

[0011] Furthermore, there are two end face dial indicators, which are relatively arranged on both sides of the central axis of the pump-side coupling.

[0012] Furthermore, the number of the magnetic bases is three, two of which are fixed on the side of the flange of the bracket facing the pump side coupling to be fixedly connected to the two end face dial indicators respectively, and one magnetic base is fixed on the side of the flange of the bracket away from the pump side coupling to be fixedly connected to the outer cylindrical dial indicator.

[0013] Furthermore, the axis of the dummy shaft coincides with the axis of the small machine side coupling.

[0014] Furthermore, one end of the dummy shaft adjacent to the small machine side coupling is fixed to the small machine side coupling by means of bolts.

[0015] Furthermore, the bracket is a metal bracket, and the dummy shaft and flange of the bracket are an integrally formed structure.

[0016] Furthermore, the concentricity, verticality and / or runout of the support are less than or equal to 0.03 mm.

[0017] In the detection device provided in the embodiment of the present application, when it is necessary to perform alignment detection on the small machine side coupling and the pump side coupling, the dummy shaft of the detection device is fixed on the small machine side coupling, the flange is fixed on the end of the dummy shaft away from the small machine side coupling, and the dial indicator can be movably mounted on the flange of the bracket, thereby providing sufficient installation position for the dial indicator. At the same time, the probe of the dial indicator is against the outer circumferential surface and / or end face of the pump side coupling to detect the outer cylindrical deviation and / or end face deviation of the pump side coupling relative to the small machine side coupling, thereby ensuring the detection accuracy of the outer cylindrical deviation and / or end face deviation of the pump side coupling relative to the small machine side coupling. At the same time, the detection device provided in the embodiment of the present application, through the above-mentioned arrangement, has a simple structure, low manufacturing cost and is easy to use, which can save maintenance time and maintenance manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of a detection device provided in an embodiment of the present application.

[0020] Description of Figure Numbers:

[0021] Label Name Label Name 100 Detection device 10 Coupling on the small machine side 20 Coupling on the pump side 110 Bracket 120 Dial indicator 111 Dummy shaft 112 Flange 130 Magnetic base 140 Connecting rod 141 First connecting rod 142 Second connecting rod 121 External diameter dial indicator 122 End face dial indicator 150 Bolt

[0022] The realization, functional features and advantages of the purpose of this application will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific Embodiments

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0026] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0027] Therefore, with reference to Figure 1, an embodiment of the present application provides a detection device 100 for detecting the alignment of the coupling 10 on the small turbine side and the coupling 20 on the pump side. The detection device 100 includes a bracket 110 and a dial indicator 120. Among them, the bracket 110 includes a dummy shaft 111 and a flange 112. The dummy shaft 111 is fixed on the coupling 10 on the small turbine side, and the flange 112 is fixed at one end of the dummy shaft 111 away from the coupling 10 on the small turbine side. The dial indicator 120 is movably installed on the flange 112 of the bracket 110 and abuts against the outer peripheral surface and / or end surface of the coupling on the pump side to detect the outer diameter deviation and / or end surface deviation of the coupling 20 on the pump side relative to the coupling 10 on the small turbine side.

[0028] Specifically, when it is necessary to detect the alignment of the coupling 10 on the small turbine side and the coupling 20 on the pump side, the dummy shaft 111 of the detection device 100 is fixed on the coupling 10 on the small turbine side, and the flange 112 is fixed at one end of the dummy shaft 111 away from the coupling 10 on the small turbine side. The dial indicator 120 is movably installed on the flange 112 of the bracket 110. The flange 112 is disc-shaped, so that it can provide enough installation positions for the dial indicator 120, that is, it can ensure that the dial indicator 120 can be firmly installed on the flange 112. At the same time, the probe of the dial indicator 120 abuts against the outer peripheral surface and / or end surface of the coupling on the pump side to detect the outer diameter deviation and / or end surface deviation of the coupling 20 on the pump side relative to the coupling 10 on the small turbine side, thereby ensuring the detection accuracy of the outer diameter deviation and / or end surface deviation of the coupling 20 on the pump side relative to the coupling 10 on the small turbine side. At the same time, the detection device 100 provided by the embodiment of the present application, through the above settings, has a simple structure, low manufacturing cost and convenient use, and can save maintenance time and maintenance manpower.

[0029] After the dial indicator 120 is installed in place, the maintenance personnel can turn the barring gear of the small steam turbine to rotate the coupling 10 on the small turbine side, and then turn the coupling 20 on the pump side to realize the double-turning centering operation of the feed pump and the coupling on the small turbine side, so as to detect the outer diameter deviation and / or end surface deviation of the coupling 20 on the pump side relative to the coupling 10 on the small turbine side. During the detection process, the circumference of the coupling 20 on the pump side is divided into one point every 90°. By double-turning the rotor, the dial indicator 120 rotates around the outer peripheral surface of the coupling 20 on the pump side and the end surface of the coupling 20 on the pump side for one week. After reading four groups of values at 0°, 90°, 180°, and 270° respectively, the rotor returns to the starting position, and the outer diameter deviation, end surface deviation or opening deviation of the coupling 20 on the pump side can be accurately measured, and then the center data value of the small steam turbine and the feed pump can be calculated. Among them, half of the difference between the upper and lower readings and the left and right readings on the same circumference of the coupling 20 on the pump side is the circumferential center deviation, that is, the outer diameter deviation. Take the average value of each point on the end surface, and the difference between the upper and lower average values and the left and right average values on the same end surface is the end surface deviation.

[0030] Further, referring to againFigure 1 , in some embodiments of the present application, the detection device 100 further includes a magnetic base 130 and a connecting rod 140. The magnetic base 130 is movably magnetically attracted to the flange 112 of the bracket 110, and the dial indicator 120 is movably connected to the magnetic base 130 through the connecting rod 140.

[0031] Further, referring to Figure 1 , in some embodiments of the present application, the connecting rod 140 includes a first connecting rod 141 and a second connecting rod 142. The first connecting rod 141 is movably connected to the magnetic base 130, the first connecting rod 141 is movably connected to the second connecting rod 142, and the dial indicator 120 is movably connected to the second connecting rod 142.

[0032] As Figure 1 shown, the first connecting rod 141 of the connecting rod 140 is movably connected to the magnetic base 130, the first connecting rod 141 is movably connected to the second connecting rod 142, and the dial indicator 120 is movably connected to the second connecting rod 142, so that the position of the dial indicator 120 can be flexibly adjusted to ensure the detection accuracy of the outer diameter deviation and / or end face deviation of the pump-side coupling 20 relative to the small-machine-side coupling 10.

[0033] Further, referring again to Figure 1 , in some embodiments of the present application, the dial indicator 120 includes an outer diameter dial indicator 121 and an end face dial indicator 122. The outer diameter dial indicator 121 abuts against the outer peripheral surface of the pump-side coupling 20, and the end face dial indicator 122 abuts against the end face of the pump-side coupling 20 facing the small-machine-side coupling 10.

[0034] Specifically, the outer diameter dial indicator 121 abuts against the outer peripheral surface of the pump-side coupling 20 to detect the outer diameter deviation of the pump-side coupling 20 relative to the small-machine-side coupling 10, and the end face dial indicator 122 abuts against the end face of the pump-side coupling 20 facing the small-machine-side coupling 10 to detect the end face deviation of the pump-side coupling 20 relative to the small-machine-side coupling 10. With the above settings, the detection device 100 provided in the embodiments of the present application can simultaneously detect the outer diameter deviation and the end face deviation of the pump-side coupling 20 relative to the small-machine-side coupling 10, thereby saving detection time and detection labor.

[0035] Further, referring to Figure 1 , in some embodiments of the present application, the number of the end face dial indicators 122 is two, and the two end face dial indicators 122 are oppositely arranged on both sides of the central axis of the pump-side coupling 20.

[0036] Specifically, in the detection device 100 provided in the embodiment of the present application, two end face dial indicators 122 are relatively arranged on both sides of the central axis of the pump side coupling 20, so that the end face deviation of the pump side coupling 20 relative to the small machine side coupling 10 can be detected simultaneously, thereby reducing the detection error.

[0037] Further, refer again to Figure 1 In some embodiments of the present application, the number of magnetic bases 130 is three, two of which are fixed on the side of the flange 112 of the bracket 110 facing the pump-side coupling 20 to be fixedly connected to the two end face dial indicators 122 respectively, and one magnetic base 130 is fixed on the side of the flange 112 of the bracket 110 away from the pump-side coupling 20 to be fixedly connected to the outer cylindrical dial indicator 121.

[0038] Specifically, the magnetic base 130 is movably fixed to the flange 112 of the bracket 110 by magnetic attraction, so as to fix the external cylindrical dial indicator 121 and the end face dial indicator 122. The number of the magnetic bases 130 matches the external cylindrical dial indicator 121 and the end face dial indicator 122, so that the position of the external cylindrical dial indicator 121 and / or the end face dial indicator 122 can be adjusted by the position of the magnetic base 130, which is beneficial to improve the detection accuracy, and the structure is simple and easy to install.

[0039] Further, refer to Figure 1 In some embodiments of the present application, the axis of the dummy shaft 111 coincides with the axis of the small machine side coupling 10 .

[0040] As mentioned above, the function of the dummy shaft 111 is to fix the flange 112. In order to ensure the detection accuracy, the axis of the dummy shaft 111 coincides with the axis of the small machine side coupling 10, that is, the dummy shaft 111 extends outward from the central axis of the small machine side coupling 10 and is fixedly connected to the flange 112, thereby providing an installation position for the dial indicator 120 to ensure the alignment detection accuracy of the pump side coupling 20 relative to the small machine side coupling 10.

[0041] Further, refer again to Figure 1 In some embodiments of the present application, one end of the dummy shaft 11 adjacent to the small machine side coupling 10 is fixed to the small machine side coupling 10 by a bolt 150, thereby ensuring that the dummy shaft 11 is firmly installed on the small machine side coupling 10. The function of the dummy shaft 111 is to fix the flange 112, thereby providing an installation position for the dial indicator 120, so as to further ensure the alignment detection accuracy of the pump side coupling 20 relative to the small machine side coupling 10.

[0042] Furthermore, in some embodiments of the present application, the bracket 110 is a metal bracket, and the dummy shaft 111 and the flange 112 of the bracket 110 are an integrally formed structure.

[0043] Specifically, the bracket 110 is made of a metal material. Further, the bracket 110 is made of a ferrous metal material, such as 20# carbon steel, etc., so as to ensure that the magnetic base 130 can be magnetically attracted to the flange 112 of the bracket 110. In addition, the dummy shaft 111 and the flange 112 of the bracket 110 are of an integrally formed structure, and the bracket 110 is usually cast from a metal material, thereby being able to simplify the manufacturing process and reduce the manufacturing cost.

[0044] Further, in some embodiments of the present application, the concentricity, perpendicularity and / or runout of the bracket 110 are less than or equal to 0.03 mm. Therefore, the machining accuracy of the bracket 110 is relatively high, thereby being able to ensure the centering detection accuracy of the dial indicator.

[0045] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the inventive concept of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A detection device for detecting the alignment of the coupling on the small machine side and the coupling on the pump side, characterized in that, The detection device comprises: A bracket, the bracket comprising a dummy shaft and a flange, the dummy shaft being fixed to the small machine side coupling, the flange being fixed to an end of the dummy shaft away from the small machine side coupling; and A dial indicator is movably mounted on the flange of the bracket and abuts against the outer circumferential surface and / or end surface of the pump side coupling to detect the outer circle deviation and / or end surface deviation of the pump side coupling relative to the small machine side coupling.

2. The detection device according to claim 1, wherein It also includes a magnetic base and a connecting rod. The magnetic base can be movably magnetically attracted to the flange of the bracket, and the dial indicator is movably connected to the magnetic base through the connecting rod.

3. The detection device according to claim 2, characterized in that, The connecting rod includes a first connecting rod and a second connecting rod, the first connecting rod is movably connected to the magnetic base, the first connecting rod is movably connected to the second connecting rod, and the dial indicator is movably connected to the second connecting rod.

4. The detection device according to claim 3, characterized in that, The dial indicator includes an outer cylindrical dial indicator and an end face dial indicator. The outer cylindrical dial indicator abuts against the outer peripheral surface of the pump side coupling, and the end face dial indicator abuts against the end surface of the pump side coupling facing the small machine side coupling.

5. The detection device according to claim 4, characterized in that, The number of the end face dial indicators is two, and the two end face dial indicators are relatively arranged on both sides of the central axis of the pump side coupling.

6. The detection device according to claim 5, characterized in that, There are three magnetic bases, two of which are fixed on the side of the flange of the bracket facing the pump side coupling to be fixedly connected to the two end face dial indicators respectively, and one magnetic base is fixed on the side of the flange of the bracket facing away from the pump side coupling to be fixedly connected to the outer cylindrical dial indicator.

7. The detection device according to any one of claims 1 to 6, characterized in that, The axis of the dummy shaft coincides with the axis of the small machine side coupling.

8. The detection device according to claim 7, wherein One end of the dummy shaft adjacent to the small machine side coupling is fixed to the small machine side coupling by bolts.

9. The detection device according to claim 8, characterized in that, The bracket is a metal bracket, and the false shaft and flange of the bracket are an integrally formed structure.

10. The detection device according to claim 9, characterized in that, The concentricity, verticality and / or runout of the support are less than or equal to 0.03 mm.

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