Static balance detection device for large disc workpiece

Abstract

The utility model discloses a static balance detection device for a large disc workpiece, and belongs to the field of mechanical workpiece static balance testing. Comprising a supporting beam which is made of angle steel profiles and arranged at the bottom of the symmetry axis of a disc workpiece, two positioning blocks which are placed at the two ends of the supporting beam and are in clearance fit with the upper edge of the supporting beam, and screws which penetrate through the disc workpiece and are fixedly connected with the positioning blocks. And the gradienter is horizontally arranged on the symmetric line of the disc workpiece and is vertical to the supporting beam. According to the utility model, the angle steel section bar is used as the supporting beam, the positioning block is fixed on the riveting hole of the disc workpiece and is matched with the supporting beam to form the balance type static balance detection device, and the tool is simple in structure, safe, reliable, convenient to manufacture and low in cost.

Description

Technical Field

[0001] The utility model belongs to the field of static balance testing of mechanical workpieces, in particular to a static balance testing device for large disc workpieces. Background Art

[0002] Large disc workpieces refer to workpieces with a large rotation diameter (generally more than 2 meters), a centrally symmetrical structure, clockwise / counterclockwise rotation, and strong bearing capacity. They are mostly used in industries such as ships, wind power, and steam turbines. Taking the base of a certain marine rotating wind tube as an example, the outer diameter is 4.8 meters, the inner diameter is 2.9 meters, the maximum height is 0.5 meters, and the weight is about 5 tons. According to ISO 1940 / 1-1986, the determination of the allowable imbalance of rigid rotor balance quality, the use requirement grade G16 is used. The base is heavy and large in size, has an axisymmetric structure, and is a rotating component. The imbalance will cause eccentric load, wear, abnormal vibration, etc., so the balance requirement is high. It is necessary to perform static balance tests on large disc-shaped workpieces by adding mass blocks or punching holes to eliminate the imbalance in appropriate positions to eliminate the imbalance.

[0003] After searching, a Chinese utility model patent (publication number: CN 219511744 U) discloses a balance-type static balancing device for a large rotor. The device fixes the rotor through a connecting shaft and cooperates with a balancing plate to realize static balance detection. In order to prevent the rotor from tipping over, a plurality of anti-dumping blocks are arranged at the bottom of the rotor. However, for a disc workpiece, its shape is a complete circle or a circular ring structure, and there is no structure such as a center hole, so it cannot be fixed by a connecting shaft. In addition, the positioning point is located in the center, so it cannot be transferred to the static balance detection of the disc workpiece. Moreover, the static balancing device in the utility model needs to be equipped with a plurality of anti-dumping blocks. When replacing workpieces of different specifications, the size and position of the anti-dumping blocks need to be adjusted. Utility Model Content

[0004] In order to overcome the above technical defects, the utility model provides a static balance detection device for a large disc workpiece to solve the problems involved in the background technology.

[0005] The utility model provides a static balance detection device for a large disc workpiece, comprising: a support beam made of an angle steel profile and arranged at the bottom of the symmetry axis of the disc workpiece, two positioning blocks placed at both ends of the support beam and matched with the edge gap on the support beam, screws that pass through the disc workpiece and are fixedly connected to the positioning blocks, and a level meter horizontally placed on the symmetry line of the disc workpiece and perpendicular to the support beam.

[0006] Preferably or optionally, the positioning block comprises a main body, a positioning notch in a funnel shape arranged at the lower part of the main body, and a connecting part arranged at the upper part of the positioning block and cooperating with the screw.

[0007] Preferably or optionally, the positioning notch comprises an eight-shaped notch at the bottom and a rectangular notch at the top of the eight-shaped notch.

[0008] Preferably or optionally, a predetermined gap is left between the rectangular notch and the upper edge of the support beam.

[0009] Preferably or optionally, the disc workpiece is a base of a rotating wind cylinder.

[0010] Preferably or optionally, the base includes: a disk body welded from high-strength structural steel plates and in a circular shape, a rib plate arranged at the outer edge of the disk body and evenly arranged along the circumference, a plurality of rivet holes evenly distributed on the rib plate, and a transmission ring arranged in the central area of ​​the disk body.

[0011] Preferably or optionally, the bottom of the transmission collar just abuts against the upper edge of the support beam.

[0012] Preferably or optionally, a plurality of counterweight adjustment positions are evenly distributed on the disc body.

[0013] Preferably or optionally, the level is a bubble level, and the bubble level has a numerical display function.

[0014] Preferably or optionally, the length of the support beam is greater than or equal to the diameter of the disc workpiece.

[0015] The utility model relates to a static balance detection device for a large disc workpiece. Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts an angle steel profile as a support beam, fixes a positioning block on a riveting hole of the disc workpiece, and cooperates with the support beam to form a balance-type static balance detection device. The tooling structure is simple, safe and reliable, easy to manufacture, and low in cost. Due to the limited height of the support beam and the special structure of the positioning block, the disc workpiece has higher stability, and no additional anti-dumping block is required, which can further reduce the number of processes and personnel required to complete the entire static balance experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a disc workpiece in the utility model.

[0017] Figure 2 It is a structural schematic diagram of the static balance detection device in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the support beam, the positioning block and the screws in the utility model.

[0019] Figure 4 It is a structural schematic diagram of the positioning block in the utility model.

[0020] The accompanying drawings are marked as follows:

[0021] 100, disc workpiece; 110, disc body; 120, rib plate; 130, rivet hole; 140, transmission collar;

[0022] 210, support beam; 220, positioning block; 221, main body; 222, positioning notch; 223, connecting part; 230, screw; 240, level; 250, counterweight adjustment position. DETAILED DESCRIPTION

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0024] In order to better understand the present solution, the structure of the disc workpiece 100 is first described. The disc workpiece 100 in this embodiment is the base of a marine rotating wind tube. Figure 1 The base includes: a disk body 110 welded from high-strength structural steel plates and in a circular shape, a rib plate 120 arranged at the outer edge of the disk body 110 and evenly arranged along the circumference, a plurality of rivet holes 130 evenly distributed on the rib plate 120, and a transmission collar 140 arranged in the center area of ​​the disk body 110. It should be noted that the rivet hole 130 is a structure provided by the disk body 110, which is used to fix the rotating wind cylinder and / or the base is installed on the upper surface of the ship deck. The transmission collar 140 is installed with a transmission mechanism to transmit the power of the rotating wind cylinder.

[0025] See attached Figures 2 to 3 , a static balance detection device for a large disc workpiece 100, comprising: a support beam 210 made of an angle steel profile and arranged at the bottom of the symmetry axis of the disc workpiece 100, two positioning blocks 220 placed at both ends of the support beam 210 and matched with the upper edge gap of the support beam 210, screws 230 passing through the disc workpiece 100 and fixedly connected to the positioning blocks 220, and a level 240 horizontally placed on the symmetry line of the disc workpiece 100 and perpendicular to the support beam 210. In this embodiment, an angle steel profile is used as the support beam 210, and the positioning blocks 220 are fixed on the riveting holes of the disc workpiece 100, and are matched with the support beam 210 to form a balance type static balance detection device, and the level 240 is equivalent to the pointer of a balance. According to the tilt state of the level 240, the unbalance amount of the disc workpiece 100 is determined, and then the unbalance amount is eliminated by adding a mass block or punching holes at a suitable position to remove weight, so as to achieve static balance of the disc-shaped workpiece.

[0026] In a further embodiment, the level 240 is a bubble level 240, and the bubble level 240 has a digital display function for measuring the levelness, which is convenient for the operator to intuitively judge the size of the imbalance, reasonably balance the weight, and improve the experimental efficiency.

[0027] In a further embodiment, the length of the support beam 210 is greater than or equal to the diameter of the disc workpiece 100, and the bottom of the transmission ring 140 just abuts against the upper edge of the support beam 210, that is, there is multi-point contact between the disc workpiece 100 and the support beam 210, thereby preventing the disc workpiece 100 from tilting along the direction of the support beam 210.

[0028] In further embodiments, see the attached Figure 4 The positioning block 220 includes a main body 221, a funnel-shaped positioning notch 222 disposed at the lower part of the main body 221, and a connecting portion 223 disposed at the upper part of the positioning block 220 and cooperating with the screw 230. The positioning notch 222 includes an eight-shaped notch located at the lower part and a rectangular notch at the top of the eight-shaped notch. A predetermined gap is left between the rectangular notch and the upper edge of the support beam 210. The predetermined gap is about 2 mm, and there is almost no offset relative to the diameter of the entire disc workpiece 100 of nearly 5 m. Moreover, the rectangular notch has a certain self-locking function, and when the unbalance amount in the direction perpendicular to the support beam 210 is relatively small, no transition tilt will occur.

[0029] In a further embodiment, a plurality of counterweight adjustment positions 250 are evenly distributed on the disk body 110. The counterweight adjustment position 250 can be used to increase the counterweight or reduce the weight. The way to increase the weight is welding or riveting the counterweight block, and the way to reduce the counterweight is drilling. Those skilled in the art can reasonably select one or more of these methods to combine and balance the disk workpiece 100.

[0030] In order to facilitate understanding of the technical solution of the static balance detection device for the large disc workpiece 100, a brief description of its detection and adjustment methods is given:

[0031] Step 1, divide the disc body 110 of the disc workpiece 100 into eight directions of 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315° in the circumferential direction, and mark the disc body 110 with a marker;

[0032] Step 2, use a crane to lift the disc workpiece 100 onto the support beam 210, use positioning blocks 220 at both ends to align the φ36mm round holes on the disc body 110 with the upper edges of the support beam 210, insert the screws 230 into the rivet holes 130 and screw them into the positioning blocks 220, and at the same time make the two side surfaces of the support beam 210 coincide with the symmetry axis of the disc body 110, and make the 0° to 180° direction of the disc body 110 coincide with the center plane of the support beam 210;

[0033] Step 3, slowly lower the suspension rope, the pan body 110 will tilt toward the heavier side, add several counterweights in the circumferential direction of the upward tilted side of the pan body 110, and use the level 240 to measure the horizontality until both sides of the pan body 110 are balanced. When adding counterweights, only add counterweights at vertical angles. For example, when testing in the direction of 0° to 180°, only add counterweights in the direction of 90° to 270°.

[0034] Step 4, change the placement direction of the disk body 110 to 90° to 270°, and repeat the operation of step 3;

[0035] Step 5, change the placement direction of the disk body 110 to a direction of 45° to 225°, and repeat the operation of step 3;

[0036] Step 6, change the placement direction of the disk body 110 to 135° to 315°, and repeat the operation of step 3;

[0037] Step 7: After the test is completed, a layout diagram of the counterweight blocks is provided to the disk body 110 .

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A static balance detection device for a large disc workpiece, characterized in that: include: A support beam (210) made of angle steel profile and arranged at the bottom of the symmetry axis of a disc workpiece (100), two positioning blocks (220) placed at both ends of the support beam (210) and matched with the upper edge gap of the support beam (210), screws (230) passing through the disc workpiece (100) and fixedly connected to the positioning blocks (220), and a level (240) horizontally placed on the symmetry line of the disc workpiece (100) and perpendicular to the support beam (210).

2. The static balance detection device for a large disc workpiece according to claim 1, characterized in that: The positioning block (220) comprises a main body (221), a funnel-shaped positioning notch (222) arranged at the lower part of the main body (221), and a connecting portion (223) arranged at the upper part of the positioning block (220) and cooperating with the screw (230).

3. The static balance detection device for a large disc workpiece according to claim 2, characterized in that: The positioning notch (222) comprises an eight-shaped notch at the bottom and a rectangular notch at the top of the eight-shaped notch.

4. The static balance detection device for a large disc workpiece according to claim 3, characterized in that: A predetermined gap is left between the rectangular notch and the upper edge of the support beam (210).

5. The static balance detection device for a large disc workpiece according to claim 1, characterized in that: The disc workpiece (100) is the base of the rotating wind cylinder.

6. The static balance detection device for a large disc workpiece according to claim 5, characterized in that: The base comprises: a disk body (110) welded from high-strength structural steel plates and in a circular shape, a rib plate (120) arranged at the outer edge of the disk body (110) and evenly arranged along the circumference, a plurality of rivet holes (130) evenly distributed on the rib plate (120), and a transmission collar (140) arranged in the central area of ​​the disk body (110).

7. The static balance detection device for a large disc workpiece according to claim 6, characterized in that: The bottom of the transmission collar (140) just butts against the upper edge of the support beam (210).

8. The static balance detection device for a large disc workpiece according to claim 6, characterized in that: A plurality of counterweight adjustment positions (250) are evenly distributed on the disk body (110).

9. The static balance detection device for a large disc workpiece according to claim 1, characterized in that: The level (240) is a bubble-type level (240), and the bubble-type level (240) has a numerical display function.

10. The static balance detection device for a large disc workpiece according to claim 1, characterized in that: The length of the support beam (210) is greater than or equal to the diameter of the disc workpiece (100).

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