CN205744896U - Heavy free forging oil press rotary table bearing arrangement - Google Patents

Abstract

Heavy free forging oil press rotary table bearing arrangement, including outer ring and inner ring, inner ring is made up of the first inner ring and the second inner ring, the outer rim on the first inner ring top is radially provided with first annular projection, the outer rim of the second inner ring bottom is radially provided with the second annular protrusion, and the aperture surface of outer ring is provided with the 3rd annular protrusion being embedded between first annular projection and the second annular protrusion；Space between 3rd annular protrusion and first annular projection accommodates the first retainer and the first roller；Space between 3rd annular protrusion and the second annular protrusion accommodates the second retainer, the second roller and three rollers；On the outer wall of the second inner ring, the position that crosses with the first inner ring is provided with annular groove, is provided with the 4th roller between inwall and the annular groove of the 3rd annular protrusion.While the axial force that bearing of the present utility model is bigger when bearing forging, the radial load that a determining cause unbalance loading causes can be born, improve reliability during forging application.

Description

Bearing structure for rotary table of heavy free forging hydraulic press

technical field

The utility model relates to a heavy-duty forging forming tooling auxiliary tool, in particular to a bearing structure for a rotary table of a heavy-duty free forging hydraulic press.

Background technique

The rotary table is the most basic metallurgical auxiliary tool of the hydraulic press. It is mainly used for the forging process of parts, and it is subjected to working pressure and high temperature during the forging process. When the hydraulic press forges disc-like forgings, the forgings on the rotary table will be rotated at a certain angle according to the direction given by the process after each forging is completed with the hammer head vertically up and down. The rotation of the forging is supported by a large slewing bearing. The traditionally used bearing is a combined structure of rollers and rolling balls. As shown in Figure 1, when the rotary table is rotating and the hydraulic press is subjected to super large axial loads and unbalanced loads, the cage frame will be damaged, the raceways will be partially sunken, The phenomenon that the guide surface is ground and the raceway is cracked shows that the traditional bearing cannot withstand the heavy load of the on-site press, and the bearing cannot be lubricated, so it must be redesigned and manufactured.

Utility model content

The utility model provides a bearing structure for a rotary table of a heavy-duty free forging oil press, which can avoid the problem that the traditional bearing cannot bear the heavy load of the on-site press.

The technical scheme adopted by the utility model to solve the above problems is: the bearing structure for the rotary table of the heavy-duty free forging hydraulic press includes an outer ring and an inner ring, the inner ring is composed of a first inner ring and a second inner ring, the first inner ring and The second inner ring is separated up and down and fixed together by bolts. The outer edge of the upper part of the first inner ring is provided with a first annular protrusion along its radial direction. The outer diameter surface of the first annular protrusion is connected to the inner diameter surface of the outer ring. offset; the outer edge of the lower part of the second inner ring is provided with a second annular protrusion along its radial direction, the lower end surface of the outer ring is located on the upper end surface of the second annular protrusion, and the outer diameter surface of the outer ring is aligned with the second annular protrusion The outer diameter surface of the outer ring is flush, and the inner diameter surface of the outer ring is provided with a third annular protrusion embedded between the first annular protrusion and the second annular protrusion; wherein, the third annular protrusion and the first annular protrusion The first cage and the first roller are accommodated in the space between the protrusions, and the first roller is installed in the pocket hole of the first cage; the space between the third annular protrusion and the second annular protrusion accommodates There is a second cage, a second roller and a third roller, and the second roller and the third roller are installed side by side in the pocket of the second cage; the outer wall of the second inner ring and the first inner ring An annular groove is provided at the intersection, and a fourth roller is installed between the inner wall of the third annular protrusion and the annular groove; wherein, a first roller is provided between the lower end surface of the outer ring and the upper end surface of the second annular protrusion. For the sealing ring, a second sealing ring is arranged between the inner diameter surface of the outer ring and the outer diameter surface of the first annular protrusion.

Further, the second roller and the third roller have the same diameter, and the first roller, the second roller and the fourth roller have different diameters.

In the utility model, the first inner ring and the second inner ring are provided with oil injection holes communicating with the first roller, the second roller, the third roller and the fourth roller.

The bearing structure of the utility model takes into account the operating conditions of forging disc-shaped forgings on the rotary table on the hydraulic press. The single-piece pressing operation takes a long time, and the heat transfer of the forgings forms a similar continuous operation, thereby increasing the working environment temperature of the bearings inside the table. The structure of three rows and four rows of rolling elements adopted in the bearing of the utility model can bear super large axial load and eccentric load, reasonable lubrication measures, and a structure that is easy to assemble, disassemble and repair, and is suitable for rotation on super heavy free forging hydraulic presses Workbench use.

Beneficial effects: 1. The bearing of the utility model can withstand a certain radial load caused by partial load while bearing a large axial force during forging, and improve the reliability of forging application; moreover, the bearing can improve the bearing capacity The axial load that may be increased by the outside world can also bear a large overturning moment, and it can maintain a small change in external dimensions under high-temperature conditions, improve lubrication, and prolong service life.

2. The setting of the first sealing ring and the second sealing ring forms a seal on the outer side of the axially stressed raceway of the lower layer of the bearing, and at the gap between the upper part of the axially stressed raceway of the upper layer and the outside world, so as to ensure good dustproofing of the raceway Excellent performance, and the rollers have good lubrication conditions after heating, which prolongs the service life under forging high temperature and dust working conditions.

Description of drawings

Fig. 1 is a schematic diagram of a bearing in the prior art;

Fig. 2 is the bearing schematic diagram in the utility model;

Figure 3 is an enlarged schematic view of the left part of Figure 2;

Figure 4 is a schematic diagram of the cage.

Reference signs: 1, outer ring, 2, first inner ring, 20, first annular protrusion, 3, second inner ring, 30, second annular protrusion, 4, first cage, 5, second Cage, 6, first roller, 7, second roller, 8, third roller, 9, fourth roller, 10, third annular protrusion, 11, first sealing ring, 12, second Sealing ring, 13, bolt, 14, oil hole 15, pocket hole, 16, copper slide block.

detailed description

In order to facilitate the understanding of the technical means, creative features and achieved goals of the utility model, the utility model will be further elaborated below in conjunction with the specific installation schematic diagram, but the scope of protection claimed by the utility model is not limited to the description in the specific embodiment range.

The bearing structure for the rotary table of the heavy-duty free forging hydraulic press includes an outer ring 1 and an inner ring. The inner ring is composed of a first inner ring 2 and a second inner ring 3. The inner ring is a split installation form, which is convenient for disassembly and maintenance.

As shown in Figure 2 and Figure 3, the first inner ring 2 and the second inner ring 3 are separated up and down and fixed together by bolts 13, and the outer edge of the upper part of the first inner ring 2 is provided with a first ring along its radial direction. Protrusion 20, the outer diameter surface of the first annular protrusion 20 is against the inner diameter surface of the outer ring 1; the outer edge of the lower part of the second inner ring 3 is provided with a second annular protrusion 30 along its radial direction, and the lower The end surface is located on the upper end surface of the second annular protrusion 30, and the outer diameter surface of the outer ring 1 is flush with the outer diameter surface of the second annular protrusion 30, and the inner diameter surface of the outer ring 1 is provided with a ring embedded in the first annular protrusion. The third annular protrusion 10 between the protrusion 20 and the second annular protrusion 30.

Wherein, the first cage 4 and the first roller 6 are accommodated in the space between the third annular protrusion 10 and the first annular protrusion 20, and the first roller 6 is installed in the pocket of the first cage 4 The space between the third annular protrusion 10 and the second annular protrusion 30 accommodates the second cage 5, the second roller 7 and the third roller 8, the second roller 7 and the third roller 8 Installed side by side in the pocket of the second cage 5; an annular groove is provided at the junction of the outer wall of the second inner ring 3 and the first inner ring 2, between the inner wall of the third annular protrusion 10 and the annular groove A fourth roller 9 is installed. The steel cage shown in Figure 4 is used for the guide surface of the axially stressed main raceway of the lower layer of the bearing and the guide of the upper layer of the axially stressed raceway, and the structural optimization is carried out. Copper sliders 16 are provided on the inner and outer guide surfaces of the pocket hole 15 to ensure that the friction force caused by the lateral component force is reduced under the condition of forging partial load, and the service life is improved. The bearing is different from ordinary bearings in that: super large alternating axial load and superposition of alternating eccentric load.

Wherein, as shown in Figure 3, a first seal ring 11 is provided between the lower end surface of the outer ring 1 and the upper end surface of the second annular protrusion 30, and the inner diameter surface of the outer ring 1 and the outer diameter of the first annular protrusion 20 There is a second sealing ring 12 between the surfaces; the first inner ring 2 and the second inner ring 3 are provided with the connecting first roller 6, second roller 7, third roller 8 and fourth roller 9 Oil hole.

Preferably, the diameters of the second roller 7 and the third roller 8 are the same, and the diameters of the first roller 6 , the second roller 7 and the fourth roller 9 are different. Preferably, the diameter of the first roller 6 is 20mm, the diameters of the second roller 7 and the third roller 8 are both 50mm, and the diameter of the fourth roller 9 is 35mm.

The bearing of the utility model can be applied to the working condition of the working environment temperature of the bearing at about 200° C. under the production condition of forging and spinning of the heavy oil press. The bearing ring is made of 42CrMo material conforming to GB/T3077 "Alloy Structural Steel", the quenched and tempered hardness is HB229~269, and the hardness of the surface working surface of the raceway surface reaches HRC55~60 after quenching treatment, ensuring that the bearing has sufficient bearing capacity. The roller material is made of GCr15SiMn of GB/T18254 "High Carbon Chromium Bearing Steel". The manufacturing quality meets the requirements of GB/T4661 "Rolling Bearing Cylindrical Rollers", and the heat treatment meets the requirements of JB/T1255. The cage adopts a segmented cage, and the material is a combination of Q235 and QAL-10-4-4. According to the special situation of high ambient temperature and large dust, it is required to take sealing measures between the rings to prevent the grease from losing too quickly after being heated and to prevent dust pollution. Preferably, the sealing ring material is made of high temperature resistant 200 ℃ fluororubber.

Claims (3)

1. The bearing structure for the rotary table of the heavy-duty free forging hydraulic press, including the outer ring (1) and the inner ring, is characterized in that the inner ring is composed of the first inner ring (2) and the second inner ring (3), and the first inner ring (2) and the second inner ring (3) are separated up and down and fixed together by bolts (13), and the outer edge of the upper part of the first inner ring (2) is provided with a first annular protrusion (20) along its radial direction , the outer diameter surface of the first annular protrusion (20) is against the inner diameter surface of the outer ring (1); the outer edge of the lower part of the second inner ring (3) is provided with a second annular protrusion (30) along its radial direction, The lower end surface of the outer ring (1) is located on the upper end surface of the second annular protrusion (30), and the outer diameter surface of the outer ring (1) is flush with the outer diameter surface of the second annular protrusion (30), and the outer ring (1) The inner diameter surface is provided with a third annular protrusion (10) embedded between the first annular protrusion (20) and the second annular protrusion (30); Wherein, the first cage (4) and the first roller (6) are accommodated in the space between the third annular protrusion (10) and the first annular protrusion (20), and the first roller (6) is installed In the pocket hole of the first cage (4); the space between the third annular protrusion (10) and the second annular protrusion (30) accommodates the second cage (5), the second roller ( 7) and the third roller (8), the second roller (7) and the third roller (8) are installed side by side in the pocket of the second cage (5); the outer wall of the second inner ring (3) An annular groove is provided at the intersection of the upper part and the first inner ring (2), and a fourth roller (9) is installed between the inner wall of the third annular protrusion (10) and the annular groove; Wherein, a first sealing ring (11) is provided between the lower end surface of the outer ring (1) and the upper end surface of the second annular protrusion (30), and the inner diameter surface of the outer ring (1) and the first annular protrusion (20) ) is provided with a second sealing ring (12) between the outer diameter surfaces. 2. The bearing structure for the rotary table of heavy free forging hydraulic press according to claim 1, characterized in that: the second roller (7) and the third roller (8) have the same diameter, the first roller (6), The second roller (7) and the fourth roller (9) have different diameters. 3. The bearing structure for the rotary table of the heavy-duty free forging hydraulic press according to claim 1, characterized in that: the first inner ring (2) and the second inner ring (3) are provided with communicating first rollers (6), Oil holes for the second roller (7), third roller (8) and fourth roller (9).