Special tool for measuring throw of large shaft

Abstract

The utility model relates to the technical field of generator sets, in particular to a special tool for measuring the throw of a large shaft. A movable pull rod is transversely arranged on the support frame, an insulating plate is installed at the front end of the pull rod and connected with a dial indicator of a pointer contact large shaft, the rear end of the pull rod is connected with an operating handle, and a reset spring is arranged on the pull rod. The middle of the operating handle is connected with the supporting frame through a linkage piece. The tool can effectively prevent the phenomenon of instability of a handheld measuring tool, can concentrate on reading by loosening a hand, can prevent a worker from being hurt by shaft current, is stable in bracket and accurate in reading, provides reliable data for unit maintenance, can play a positive effect in the maintenance of a hydroelectric generating set or related large shaft throw measurement work, and can be widely popularized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of generator set, namely special tool of big axle swing measurement. BACKGROUND

[0002] In prior art, the swing of big axle during operation needs to be measured manually before and after the maintenance of generator set, and the existing tool is a wooden handle with a dial gauge installed in front, and when measuring, the staff holds the wooden handle on one side and contacts the dial gauge measuring head with the rotating big axle, and observes the needle stroke count, but the staff holding the wooden handle tool is unstable, causing the needle to jump randomly, which leads to inaccurate swing value and affects the quality of unit maintenance. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at the above-mentioned insufficient and provides a special tool of big axle swing measurement with stable support and accurate and reliable reading.

[0004] The technical solution of the utility model is as follows: the special tool of big axle swing measurement comprises a support frame, a movable pull rod is horizontally arranged on the support frame, an insulating plate is installed at the front end of the pull rod, the insulating plate is connected with a dial gauge contacting the big axle, an operating handle is connected with the rear end of the pull rod, and a reset spring is arranged on the pull rod; and the middle part of the operating handle is connected with the support frame through a linkage piece.

[0005] In the above-mentioned solution, the support frame has two spaced support rings, the pull rod passes through the two spaced support rings, and the reset spring is sleeved on the pull rod between the two support rings.

[0006] The rear end of the support frame has a supporting lug, and the linkage piece is connected between the supporting lug and the pull rod.

[0007] The linkage piece is V-shaped.

[0008] The bottom of the support frame is connected with a clamping seat, and the support frame is connected with the bolt on the clamping seat through the long slot at the bottom edge.

[0009] The utility model has the advantages that the tool can effectively prevent the instability of the handheld measuring tool, can concentrate on reading when the hand is loosened, can avoid the harm of shaft current to the staff, the support is stable, the reading is accurate, reliable data can be provided for unit maintenance, and the tool can play a positive role in the maintenance of hydroelectric generating set or the measurement of big axle swing, and can be widely promoted.

[0010] The embodiments of the utility model will be further described in detail below with reference to the drawings. DRAWINGS

[0011] It is the rear pull structure diagram of the pull rod of the utility model.

[0012] Figure 1 It is the rear pull structure diagram of the pull rod of the utility model.

[0013] Figure 2 is the front push structure diagram of the utility model.

[0014] Figure 3 is the linkage piece structure diagram of the utility model.

[0015] Figure 4 is the overhead structure diagram of the support frame of the utility model.

[0016] Figure 5 is the left view structure diagram of the clamping seat of the utility model.

[0017] The names of parts in the drawing are as follows: support frame 1, pull rod 2, insulating plate 3, dial indicator 4, operating handle 5, reset spring 6, linkage piece 7, supporting ring 8, supporting lug 9, clamping seat 10, long slot 11, connecting bolt 12, clamping bolt 13. DETAILED DESCRIPTION

[0018] Referring to Figures 1-5 , the special tool for large shaft swing measurement comprises a support frame 1, the support frame 1 is connected with a clamping seat 10 below, the support frame 1 is connected with the connecting bolt 12 on the clamping seat 10 through the long slot 11 on the bottom edge of the support frame 1. The support frame 1 is provided with two spaced supporting rings 8, an active pull rod 2 is transversely arranged on the support frame 1, the pull rod 2 passes through the two spaced supporting rings 8, the two supporting rings 8 (axle sleeves) of the support frame 1 are matched with the pull rod 2 with a clearance of 0.05 mm, so that flexibility is ensured and the pull rod 2 is not loose, the two supporting rings 8 on the support frame 1 and the connecting rod 2 are concentric with the pin shaft at the rear of the support frame 1. The insulating plate 3 is arranged at the front end of the pull rod 2, the insulating plate 3 is connected with the dial indicator 4 in contact with the needle of the large shaft, the operating handle 5 is connected with the rear end of the pull rod 2, the operating handle 5 is provided with an insulating silica gel handle in use, the pull rod 2 is provided with the reset spring 6, the reset spring 6 is sleeved on the pull rod 2 between the two supporting rings 8. The operating handle 5 is connected with the support frame 1 through the linkage piece 7 in the middle of the operating handle 5, the rear end of the cylindrical pull rod 2 is connected with the linkage piece 7 by a pin shaft. The support frame 1 is provided with the supporting lug 9 at the rear end, the linkage piece 7 is connected between the supporting lug 9 and the pull rod 2. The linkage piece 7 is V-shaped and is a part for connecting the pull rod 2 and the operating handle 5, and the matching clearance is 0.05 mm. The product is a mechanical special tool for measuring the swing of the large shaft of a generator set. The support frame 1 and the clamping seat 10 are fixed by four connecting bolts 12, the support frame 1 is provided with four long slots 11, the distance can be adjusted forward and backward, and the support frame 1 is installed at a proper position which can be measured. The clamping seat 10 is made of 3 mm steel plate, so that the clamping seat 10 is not loose when clamped on the flange, a certain rigidity is maintained, and the clamping seat 10 is clamped on the split joint of the oil baffle flange. The measuring head of the dial indicator 4 is aligned with the measured large shaft, and the pull rod 2 is connected with the operating handle 5. The connecting part of the dial indicator 4 and the pull rod 2 is made of insulating material, and the operating handle is also made of insulating silica gel, so that the insulating effect is ensured during measurement, and the shaft current is prevented.

[0019] Transmission principle

[0020] By the back and forth of the operating handle 5, the linkage piece 7 drives the pull rod 2 to move back and forth in the support ring 8. The pull rod 2 is provided with an insulating plate 3 at the front end, and the dial gauge 4 is connected to the insulating plate 3. The needle of the dial gauge 4 contacts the large shaft.

[0021] The support frame 1 and the clamping seat 10 are fixed by four connecting bolts 12. The support frame 1 has four long holes 11, and can be adjusted in distance and installed at a proper position for measurement.

[0022] When the operating handle 5 is pulled back, the reset spring 6 makes the needle of the dial gauge 4 away from the large shaft. When the operating handle 5 is pushed forward, the linkage piece 7 drives the pull rod 2 to move to the front end. Under the action of the reset spring 6, the rear end of the linkage piece 7 passes the horizontal point position, and can be clamped to keep at the front end position, so as to ensure that the dial gauge 4 stably contacts the large shaft for measurement. The dial gauge can be withdrawn by pulling back the operating handle 5. The front end of the dial gauge moves 25mm when the operating handle 5 is pulled back, so as to ensure that the dial gauge is within the measurement range when the dial gauge is put in, and the dial gauge is completely separated from the large shaft when the dial gauge is pulled back, so as to ensure the safety of the dial gauge.

[0023] Working process

[0024] Before the tool is used, the dial gauge 4 is checked to be intact, and the contact is not movable. The clamping seat 10 of the special tool is fixed on the half flange of the oil baffle by four tightening bolts 13. The operating handle 5 is pulled back, and the dial gauge 4 is separated from the large shaft by about 25mm. The support frame 1 is adjusted in distance and fixed. When measurement is needed, the operating handle 5 is pushed forward to make the needle of the dial gauge 4 contact the large shaft. The handle is loosened, and the reading can be stably obtained. After the reading is completed, the operating handle 5 is pulled back to make the dial gauge 4 away from the surface of the large shaft, and the measurement is completed. Under the action of the reset spring 6, the rear part of the linkage piece 7 sinks below the balance point, so as to ensure that the dial gauge can stably measure when the dial gauge is put in, and the dial gauge will not be automatically opened.

[0025] The tool is used to eliminate the instability of the hand-held tool, and can measure accurate data in the large shaft swing measurement project, so as to accurately judge the repair quality of the generator set, and the tool is convenient and flexible in measurement, can be freely installed, and the distance can be adjusted.

[0026] The above description is only a specific implementation manner of the tool, and various examples do not limit the essential content of the tool.

Claims

1. A tool for measuring the run-out of a large shaft, characterized in that The utility model relates to a watch dial cleaning device, which comprises a support frame (1), a movable pull rod (2) horizontally arranged on the support frame (1), an insulating plate (3) mounted on the front end of the pull rod (2), a dial gauge (4) connected with the insulating plate (3) and contacting a watch needle, an operating handle (5) connected with the rear end of the pull rod (2), and a reset spring (6) arranged on the pull rod (2); the middle part of the operating handle (5) is connected with the support frame (1) through a linkage piece (7).

2. The tool for measuring run-out of a large shaft according to claim 1, characterized in that The support frame (1) is provided with two spaced support rings (8), the pull rod (2) passes through the two spaced support rings (8), and the reset spring (6) is sleeved on the pull rod (2) between the two support rings (8).

3. A tool for measuring the run-out of a large shaft according to claim 1 or 2, characterised in that The rear end of the support frame (1) is provided with a supporting lug (9), and the linkage piece (7) is connected between the supporting lug (9) and the pull rod (2).

4. A tool for measuring the runout of a large shaft according to claim 3, characterized in that The linkage piece (7) is V-shaped.

5. The tool for measuring runout of a large shaft according to claim 1, characterized in that The bottom of the support frame (1) is connected with a clamping seat (10), and the support frame (1) is connected with a bolt on the clamping seat (10) through a long hole (11) in the bottom edge of the support frame (1).

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