Generator air gap measuring tool with adjustable measuring distance

Abstract

The utility model relates to a measuring-distance-adjustable generator air gap measuring tool, which is characterized in that two ends of a displacement adjusting rod are respectively arranged on a shell body of a shell, the front end of the displacement adjusting rod is in threaded connection with a front shell body, and the tail end of the displacement adjusting rod is in threaded connection with a lengthening rod into a whole, is positioned in an outer sleeve on a rear shell body, and is in threaded connection with the outer sleeve at the same time; the measuring support is arranged on the middle section of the displacement adjusting rod, the lower end face of the measuring support is in conical fit with the contact face of the displacement adjusting rod, the upper end face of the measuring support is located above the end face of the shell, and the gland limits the measuring support to generate displacement in the axial direction. A plurality of springs are arranged between the glands and the supporting edges of the measuring supports and directly act on the glands and the supporting edges of the measuring supports; and the measuring rods are respectively mounted in the measuring rod mounting grooves of the measuring supports and are fixed by lock nuts. The measuring process can be completed outside the generator chamber, the measuring rod does not need to be repeatedly inserted, pulled and adjusted, the stability of the measuring process is high, and the measuring precision is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of generator assembly, in particular to a generator air gap measuring tool with adjustable measuring distance. Background Art

[0002] During the installation and maintenance of the generator, the adjustment of the air gap of the generator is an important link and a key process that affects the progress of the maintenance. The air gap is the gap between the rotor and the stator. The space for measuring this position is small, and the gap cannot be directly measured with a vernier caliper. At present, a measuring rod is used for assistance. The measuring rod is adjusted to be equal to the gap distance. The length of the measuring rod measured by a micrometer is the distance of the gap. For example, a generator stator-rotor gap measuring rod disclosed in publication number CN219607924U is provided with an adjustment part on the measuring rod. By adjusting the height of the adjustment part, when the spacing between the adjustment parts is determined, it is the distance of the gap. However, the defect of this measuring tool is that the size of the adjustment part needs to be adjusted outside the generator chamber. Measuring an accurate gap distance once requires repeated adjustment of the size of the adjustment part. Therefore, it is very cumbersome to repeatedly plug and unplug the measuring tool, and because the size of the adjustment part is adjusted outside the generator chamber, the accuracy is relatively low. Utility Model Content

[0003] In view of the above problems, the utility model proposes a generator air gap measuring tool with adjustable measuring distance, which can adjust the size of the measuring rod inside the generator chamber from outside the generator chamber, thereby achieving the purpose of convenient measurement and improved accuracy.

[0004] To achieve the above purpose, the following technical scheme is adopted: a generator air gap measuring tool with adjustable distance, including a housing, a displacement adjustment rod, a set of measuring supports, a spring, a set of measuring rods and an extension rod,

[0005] The middle section of the displacement adjustment rod is a cone, and the two ends of the displacement adjustment rod are respectively mounted on the rear shell of the shell, and the front end of the displacement adjustment rod is connected to the front shell by a thread, so as to ensure that the displacement adjustment rod generates an axial displacement in the shell when it rotates, and the tail end of the displacement adjustment rod is screwed to the extension rod, and the extension rod is located in the outer sleeve arranged on the rear shell of the shell, and the tail end is screwed to the outer sleeve.

[0006] The lower end surface of the measuring support is a conical arc groove that matches the middle section of the displacement adjustment rod, and the outer wall of the measuring support is provided with a supporting edge around it.

[0007] A set of measuring supports is arranged on the middle section of the displacement adjustment rod. The lower end surface of the measuring support forms a conical fit with the contact surface of the displacement adjustment rod. The upper end surface of the measuring support is located above the end surface of the shell. The upper and lower end surfaces of the shell are provided with pressure covers, which limit the displacement of the measuring support in the axial direction. A plurality of springs are arranged between the pressure cover and the supporting edge of the measuring support to directly act on the two, and the plurality of springs are symmetrical with the measuring support as the center.

[0008] A group of measuring rods are respectively installed on the upper end surfaces of a group of measuring supports.

[0009] Furthermore, the upper end surface of the measuring support is open and sunken to form a measuring rod installation groove, and the measuring rod is installed in the measuring rod installation groove and fixed by a lock nut.

[0010] Furthermore, the depth of the measuring rod installation groove is smaller than the height of the measuring rod.

[0011] Furthermore, the measuring end surface of the measuring rod is an arc spherical surface.

[0012] Furthermore, the outer sleeve includes an external tube of the shell, an extension tube and a connecting sleeve. The external tube of the shell is installed on the rear shell of the outer shell. The external tube of the shell and the extension tube are connected as a whole through the connecting sleeve. The tail end of the extension rod is threadedly connected to the extension tube of the outer sleeve.

[0013] Furthermore, the pitch of the threaded connection between the front end of the displacement adjustment rod and the front housing is equal to the pitch of the threaded connection between the rear end of the extension rod and the extension tube of the outer sleeve.

[0014] Furthermore, a double nut is installed at the end position of the tail end of the extension rod.

[0015] Beneficial effects of the utility model:

[0016] 1. The displacement adjustment rod and the measuring support of the present invention are combined with a cone wedge, so that when the displacement adjustment rod produces a lateral displacement, the measuring support produces a radial displacement relative to the measuring support, thereby achieving radial size adjustment of the measuring rod installed on the measuring support, which can be achieved by rotating the displacement adjustment rod from the outside, and the cone wedge matching method has high precision, which greatly reduces the adjustment error and improves the accuracy of measurement.

[0017] 2. The new model adopts a displacement adjustment rod tail screw to connect extension rods of different lengths, and adjusts the height of the measuring rod in the measuring rod installation slot, so that the air gap of more models of engines can be measured.

[0018] 3. The displacement adjustment rod and the front housing, as well as the extension rod and the outer sleeve are all screwed with the same pitch to ensure stable and synchronous transmission, thereby ensuring the adjustment accuracy of the measuring rod.

[0019] 4. This new structure adopts screw connection, which is convenient for disassembly, transportation and management.

[0020] In summary, the novel measurement process can be completed outside the generator chamber without repeatedly plugging and unplugging the measuring rod to adjust the measurement. The measurement process is highly stable, the measurement accuracy is greatly improved, and it is easy to disassemble and assemble. It can be applied to the air gap measurement of various types of generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cone fit between the contact surface of the measuring support and the displacement adjustment rod;

[0023] Figure 3 This is a schematic diagram of the assembly measurement of the utility model.

[0024] As shown in the figure: 1. Shell; 2. Displacement adjustment rod; 3. Measuring support; 4. Spring; 5. Measuring rod; 6. Extension rod; 7. Pressure cap; 8. Outer sleeve; 9. Double nut; 10. Lock nut; 30. Measuring rod installation slot; 31. Support edge; 80. Shell external tube; 81. Extension tube; 82. Connecting sleeve. DETAILED DESCRIPTION

[0025] Example 1

[0026] The following is further described with reference to the accompanying drawings: Figure 1-2 The invention provides a generator air gap measuring tool with adjustable distance, comprising a housing 1, a displacement adjusting rod 2, a set of measuring supports 3, a spring 4, a set of measuring rods 5 and an extension rod 6.

[0027] The upper and lower end surfaces of the housing 1 are provided with a detachable gland 7, and the rear shell of the housing 1 is provided with an outer sleeve 8, which includes a housing external pipe 80, an extension pipe 81 and a connecting sleeve 82, wherein the housing external pipe 80 is installed on the rear shell of the housing 1, and the housing external pipe 80 and the extension pipe 81 are connected as a whole through the connecting sleeve 82.

[0028] The middle section of the displacement adjustment rod 2 is a cone, wherein both the front and rear ends are cylinders extending from the front and rear ends of the cone.

[0029] The upper end surface of the measuring support 3 is open and sunken to form a measuring rod installation groove 30, and the groove depth is less than the height of the measuring rod 5. The lower end surface of the measuring support 3 is a conical arc groove that matches the middle section of the displacement adjustment rod 2. The outer wall of the measuring support 3 is provided with a support edge 31 around it.

[0030] The measuring end surface of the measuring rod 5 is designed as a circular spherical surface.

[0031] The front and rear ends of the displacement adjustment rod 2 are respectively mounted on the front and rear shells of the housing 1, the front end of the displacement adjustment rod 2 is connected to the front shell by a thread, the rear end of the displacement adjustment rod 2 is screwed to the extension rod 6, the extension rod 6 is located in the outer sleeve 8 provided on the rear shell of the housing 1, and the rear end is screwed to the extension tube 81 of the outer sleeve 8, the end position of the rear end of the extension rod 6 is equipped with a double nut 9 for preparation, and the pitch of the threaded connection between the front end of the displacement adjustment rod 2 and the front shell is equal to the pitch of the threaded connection between the rear end of the extension rod 6 and the extension tube 81 of the outer sleeve 8. A group of measuring supports 3 are arranged on the middle section of the displacement adjusting rod 2, the lower end face of the measuring support 3 forms a conical fit with the contact surface of the displacement adjusting rod 2, the upper end face of the measuring support 3 is located above the end face of the housing 1, and the pressure cover 7 limits the axial displacement of the measuring support 3, a number of springs 4 are arranged between the pressure cover 7 and the supporting edge 31 of the measuring support 3 to directly act on the two, and the number of springs 4 are symmetrical with the measuring support 3 as the center, a group of measuring rods 5 are respectively installed in the measuring rod mounting grooves 30 of a group of measuring supports 3 and fixed by lock nuts 10.

[0032] The assembly measurement process of this embodiment is as follows:

[0033] like Figure 3 As described above, firstly, the displacement adjustment rod 2 is installed on the housing 1, the measuring support 3 is installed on the displacement adjustment rod 2, and a spring is installed on the supporting edge 30 of the measuring support 3, and the pressure cover 7 is installed.

[0034] Measure the dimension from the air gap measurement point in the generator chamber to the measurement position of the external personnel, assemble the outer sleeve 8, adjust the length of the connecting sleeve 82 according to the size on site, tighten the connecting sleeve 82 with the nut after the length is adjusted, install the double nut 9 at the end position of the tail end of the extension rod 6, make the double nut 9 and the extension rod 6 become one, and when the double nut 9 is rotated, the extension rod 6 also rotates at the same time;

[0035] Measure the size of the air gap in the generator chamber, install the measuring rod 5, and adjust the extended length of the measuring rod 5 so that the sizes at both ends are close to the size in the chamber;

[0036] Hold the outside of the extension tube 81, extend part of the measuring rod 5 into the air gap measurement position in the generator chamber, slowly swing the measuring rod 5 in a small amplitude, rotate the double nut 9, and the extension rod 6 drives the displacement adjustment rod 2 to move axially. Through the cone cooperation of the contact surface between the measuring support 3 and the displacement adjustment rod 2, the measuring rod 5 is adjusted in the radial direction. When the length of the measuring rod 5 is equal to the air gap, use an outside micrometer to measure the external dimension of the measuring rod 5, which is the size of the air gap.

[0037] The present invention is not limited to the present embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.

Claims

1. A generator air gap measuring tool with adjustable measuring distance, characterized in that: It comprises a housing (1), a displacement adjustment rod (2), a set of measuring supports (3), a spring (4), a set of measuring rods (5) and an extension rod (6). The middle section of the displacement adjustment rod (2) is a cone. The two ends of the displacement adjustment rod (2) are respectively mounted on the front and rear shells of the housing (1). The front end of the displacement adjustment rod (2) is connected to the front shell by a thread, so as to ensure that the displacement adjustment rod (2) generates an axial displacement in the housing (1) when rotating. The rear end of the displacement adjustment rod (2) is screwed to the extension rod (6). The extension rod (6) is located in an outer sleeve (8) arranged on the rear shell of the housing (1), and the rear end is screwed to the outer sleeve (8). The lower end surface of the measuring support (3) is a conical arc groove that matches the middle section of the displacement adjustment rod (2). The outer wall of the measuring support (3) is provided with a supporting edge (31) around it. A group of measuring supports (3) are arranged on the middle section of the displacement adjustment rod (2); the lower end surface of the measuring support (3) and the contact surface of the displacement adjustment rod (2) form a conical fit; the upper end surface of the measuring support (3) is located above the end surface of the housing (1); the upper and lower end surfaces of the housing (1) are provided with pressure covers (7); the pressure covers (7) limit the displacement of the measuring support (3) in the axial direction; a plurality of springs (4) are arranged between the pressure covers (7) and the support edge (31) of the measuring support (3) to directly act on the two; and the plurality of springs (4) are symmetrical with the measuring support (3) as the center; and a group of measuring rods (5) are respectively installed on the upper end surfaces of a group of measuring supports (3).

2. The generator air gap measurement tool according to claim 1, characterized in that: The upper end surface of the measuring support (3) is open and sunken to form a measuring rod installation groove (30), and the measuring rod (5) is installed in the measuring rod installation groove (30) and fixed by a lock nut (10).

3. The generator air gap measurement tool according to claim 2, characterized in that: The depth of the measuring rod installation groove (30) is smaller than the height of the measuring rod (5).

4. The generator air gap measurement tool according to claim 3, characterized in that: The measuring end surface of the measuring rod (5) is an arc spherical surface.

5. The generator air gap measurement tool according to claim 4, characterized in that: The outer sleeve (8) comprises an outer tube (80) of the shell, an extension tube (81) and a connecting sleeve (82). The outer tube (80) of the shell is installed on the rear shell of the outer shell (1). The outer tube (80) of the shell and the extension tube (81) are connected as a whole through the connecting sleeve (82). The tail end of the extension rod (6) is screwed to the extension tube (81) of the outer sleeve (8).

6. The generator air gap measurement tool according to claim 5, characterized in that: The pitch of the threaded connection between the front end of the displacement adjustment rod (2) and the front housing is equal to the pitch of the threaded connection between the rear end of the extension rod (6) and the extension tube (81) of the outer sleeve (8).

7. The generator air gap measurement tool according to claim 6, characterized in that: A double nut (9) is installed at the end of the tail end of the extension rod (6) for fastening.

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