Special centering tool for steel ball coal mill

Abstract

The utility model discloses a special centering tool for a steel ball coal mill, which comprises a connecting bridge, the outer surface of the connecting bridge is sleeved with a sliding pair, the sliding pair is movably connected with the connecting bridge through a sliding pair locking screw, and a digital display inner clamp vernier is fixed at the measuring end of the sliding pair. A tooth connecting block is integrally formed at the right end of the connecting bridge, the tooth connecting block is provided with an inner threaded hole connected with a motor side coupler through a connecting bolt, and one end, far away from the tooth connecting block, of the connecting bridge is movably connected with a digital display dial indicator; the coupling centering precision can be effectively improved, the opening value, the high-low deviation value and the left-right deviation value between the two couplings can be accurately measured, the link of centering and rechecking the center value of the couplings can be independently operated by one person, and the operation that two persons cooperate to carry out operation like erecting a dial indicator is not needed; installation and reading are convenient and fast, and labor and time cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coupling overhaul tool, concretely relates to a special tool for finding center of steel ball coal mill. BACKGROUND

[0002] Coupling center finding is an important work for installation and overhaul of rotating equipment such as coal mill. If the center of the coupling of the rotating equipment is not aligned, it will inevitably cause abnormal vibration of the unit. Therefore, the coupling of the rotating equipment after installation or overhaul must be centered to make the center deviation of the two shafts within the allowable range. The smaller the center deviation of the two shafts, the more accurate the alignment, the better the operation of the rotating equipment, and the longer the service life. If the center exceeds the allowable value, it may cause high temperature of the equipment bearing, increased vibration, bushing wear and other phenomena, which seriously threatens the safe and stable operation of the equipment.

[0003] The transmission feature of the steel ball coal mill is that the main motor drives the pinion shaft through the speed reducer, the pinion shaft is engaged with the large gear fixed on the cylinder of the coal mill to drive the cylinder to rotate. During the overhaul or installation process, the coupling center finding needs to be performed in the reverse direction according to the transmission mode, so the steel ball coal mill center finding is to adjust the position of the speed reducer and then adjust the position of the motor to achieve the purpose of adjusting the center, taking the coupling at the small gear shaft end of the steel ball coal mill as the reference.

[0004] A special tool for shafting alignment of a steam turbine generator unit is disclosed in Chinese Patent No. CN214276705U, which includes two end face L-shaped supports, a circumferential L-shaped support, and a plurality of dial gauges. The end face L-shaped supports are symmetrically arranged on the left and right sides, one end of each support is provided with a support adjustment track, and the other end is provided with a first dial gauge positioning hole. The dial gauge rod is provided with a positioning screw on the side of the first dial gauge positioning hole. One end of the circumferential L-shaped support is provided with a second dial gauge positioning hole, and the other end is provided with a dial rod positioning hole. The side of the dial rod positioning hole is provided with a dial rod positioning screw. The use of the present utility model greatly saves the operation space, has a simple structure, is easy to install, has strong adaptability, avoids reading errors caused by collisions, and improves work efficiency.

[0005] The above technical solution has the following defects compared with the existing coupling center finding tool:

[0006] (1) It is not possible to measure the opening value between the two couplings using a dial gauge. Because the pinion is engaged with the large gear fixed on the cylinder of the coal mill, it is not possible to rotate the coupling at the small gear shaft end by manual force during the overhaul or installation process. Therefore, the coupling at the small gear shaft end can only be used as a fixed end, and the dial gauge needle can only slide on the surface of the coupling during the coupling center finding. The measurement error is large and the opening value cannot be accurately measured, which often causes the centering of the two couplings to be incorrect.

[0007] (2) the use of magnetic table seat to set up dial gauge is cumbersome and time-consuming when measuring the outer circle height and left-right of the coupling, and it is easy to cause the dial gauge reading deviation by mistake, and it is easy to cause the dial gauge frame connecting rod to be collided with the teeth of the coupling outer circle part during the rotation of the coupling, causing the dial gauge value to deviate.

[0008] In order to solve and avoid the above problems of the steel ball mill when the coupling centering is found, the coupling centering precision is improved, and a special tool for coupling centering is needed. Content of the utility model

[0009] In view of the above defects, the utility model provides a special tool for steel ball mill centering, which comprises a connecting bridge, the outer surface of the connecting bridge is sleeved with a sliding pair, the sliding pair is movably connected with the connecting bridge through a sliding pair locking screw, a digital internal vernier is fixed at the measuring end of the sliding pair, a tooth connection block is integrally formed at the right end of the connecting bridge, the tooth connection block is provided with an internal thread hole connected with the motor side coupling through a connecting bolt, and a digital dial gauge is movably connected at the end of the connecting bridge away from the tooth connection block and is limited by a dial gauge positioning bolt.

[0010] Further, the connecting bridge is C-shaped.

[0011] Further, the digital internal vernier comprises a caliper body, a sliding groove is formed on the front surface of the caliper body, a digital indicator is movably connected in the sliding groove, a left fixed internal clamping rod is fixed on the left side of the caliper body, a right fixed internal clamping rod matched with the left fixed internal clamping rod is installed at the digital indicator, and the digital indicator is limited in the sliding groove by a positioning screw.

[0012] Further, the inner wall of the sliding groove is connected with the digital indicator through a spring.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The coupling centering precision can be effectively improved, the opening value, height difference and left-right deviation value between the two couplings can be accurately measured, one person can complete the centering review value of the coupling centering, without two people cooperating to operate like setting up the dial gauge, and the installation and reading are convenient, fast and save labor and time cost, and the hidden danger of the coupling centering deviation caused by the too large opening gap value deviation of the coupling measured by the internal hexagon and the plug gauge, the coupling centering deviation, the high temperature of the equipment bearing, the vibration aggravation, the bearing and gear tooth wear and other serious threats to the safe and stable operation of the equipment can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 The figure is a schematic view in the use state of the utility model.

[0017] In the figure: 1, connecting bridge; 2, sliding pair; 21, sliding pair locking screw; 3, digital inside call cursor; 31, left side fixed inside call rod; 32, spring; 33, right side fixed inside call rod; 34, digital display; 35, sliding slot; 36, positioning screw; 4, gear connection block; 5, connecting bolt; 6, digital dial gauge; 7, dial gauge positioning bolt; 8, gear coupling. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the device of the utility model will be described more fully below with reference to the relevant drawings. Embodiments of the device are shown in the drawings. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0019] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] EMBODIMENT

[0021] As Figure 1 shown, the embodiment provides a special tool for centering of a steel ball coal mill, which comprises a C-shaped connecting bridge 1, a sliding pair 2 is sleeved on the outer surface of the connecting bridge 1, the measuring end of the sliding pair 2 is movably connected with the connecting bridge 1 through a sliding pair locking screw 21, and a digital inside call cursor 3 is fixed at the measuring end of the sliding pair 2. It should be noted that the digital inside call cursor 3 can also be replaced by a dial inside call gauge, which can achieve accurate measurement function.

[0022] Specifically, the digital inside call cursor 3 comprises a caliper body, a sliding slot 35 is formed in the front surface of the caliper body, a digital display 34 is movably connected in the sliding slot 35, a left side fixed inside call rod 31 is fixed on the left side of the caliper body, a right side fixed inside call rod 33 matched with the left side fixed inside call rod 31 is installed at the digital display 34, the digital display 34 is limited in the inside of the sliding slot 35 through the installed positioning screw 36, and the inner wall of the sliding slot 35 is connected with the digital display 34 through the spring 32, so that the digital display 34 can be quickly reset through rebound after the limiting is cancelled.

[0023] The right end of the connecting bridge 1 is integrally formed with a toothed connecting block 4 (which can be replaced by a magnetic seat, and can be fixed with the motor side coupling), the toothed connecting block 4 is provided with an internal thread hole connected with the motor side coupling through a connecting bolt 5, and the end of the connecting bridge 1 away from the toothed connecting block 4 is movably connected with a digital dial gauge 6, and the digital dial gauge 6 is limited by a dial gauge positioning bolt 7.

[0024] The special tool for centering of the steel ball mill is used for measuring and symmetrically installing two special tools for centering of the steel ball mill to eliminate the deviation caused by shaft runout and bearing clearance. Figure 2 The special tool for centering of the steel ball mill is used for measuring and symmetrically installing two special tools for centering of the steel ball mill to eliminate the deviation caused by shaft runout and bearing clearance.

[0025] When measuring, the right sliding inner clamping rod 33 is extruded to the left side of the spring 32 to approach the left fixed inner clamping rod 31 and the positioning screw 36 is tightened, the internal thread hole matched with the toothed connecting bolt 5 is formed on the tooth on the center line position of the end face of the ZL elastic pin tooth coupling 8 at the motor end, the toothed connecting block 4 is aligned with the internal thread hole on the tooth, the toothed connecting bolt 5 is connected with the internal thread hole, the sliding pair 2 is slid to the left to make the wear-resistant measuring needle head below the left fixed inner clamping rod 31 close to the end face of the pin tooth coupling 8, and the sliding pair locking screw 21 is tightened, then the positioning screw 36 is loosened, the right sliding inner clamping rod 33 is extruded to the left side of the spring 32 to approach the left fixed inner clamping rod 31 and the positioning screw 36 is tightened, the wear-resistant measuring needle head below the right sliding inner clamping rod 33 is close to the end face of the ZL elastic pin tooth coupling 8, the measuring value is formed on the digital display 34, the dial gauge positioning bolt 7 is loosened, the digital dial gauge 6 is adjusted to the appropriate position, the dial gauge positioning bolt 7 is tightened, and the outer circle value is displayed on the digital dial gauge 6.

[0026] It should be noted that the structure of the utility model can be realized in various different forms, and is not limited to the embodiments, and any equivalent transformation made by those skilled in the art according to the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, for example, loading and unloading of other articles, is included in the protection scope of the utility model.

Claims

1. A special tool for centering a ball mill, comprising a connecting bridge, characterized in that: The outer surface of the connecting bridge is fitted with a sliding pair, which is movably connected to the connecting bridge by a sliding pair locking screw. The measuring end of the sliding pair is fixed with a digital display internal caliper. The right end of the connecting bridge is integrally formed with a toothed connecting block. The toothed connecting block has an internal threaded hole that is connected to the motor-side coupling by a connecting bolt. The end of the connecting bridge away from the toothed connecting block is movably connected to a digital display dial indicator, and the digital display dial indicator is limited by a dial indicator positioning bolt.

2. The special tool for centering a ball mill as described in claim 1, characterized in that: The connecting bridge is C-shaped.

3. The special tool for centering a ball mill as described in claim 1, characterized in that: The digital display inner caliper includes a caliper body, a slide groove on the front of the caliper body, a digital display movably connected in the slide groove, a left fixed inner caliper rod fixed on the left side of the caliper body, and a right fixed inner caliper rod adapted to the left fixed inner caliper rod installed at the digital display. The digital display is limited to the inside of the slide groove by the installed positioning screw.

4. The special tool for centering a ball mill as described in claim 3, characterized in that: The inner wall of the slide is connected to the digital display via a spring.

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