CN204164181U - Split type super sized type turntable bearing - Google Patents

Abstract

A split type super large slewing bearing, the inner ring and the outer ring are provided with corresponding upper raceways, lower raceways and radial raceways, and the rollers are assembled on the upper raceways and lower raceways of the inner ring and outer ring In the cavity formed by the radial raceway and the radial raceway, the rollers in the upper raceway and the lower raceway are separated by cages, and the rollers in the radial raceway are separated by spacers. The upper and lower ends of the cavity are respectively installed with The sealing ring isolates the cavity from the outside world. The outer ring is composed of three equally divided ring segments connected end to end. The overlapping structure is adopted between two adjacent segments. The radial direction forms an included angle of 6°. The inner ring is composed of an upper inner ring and a lower inner ring. The upper inner ring and the lower inner ring are respectively composed of three equally divided ring segments connected end to end. The butt joint surface and the radial direction of the slewing bearing form an included angle of 6°; the utility model adopts a three-section structure, which solves the difficult problem in the processing and transportation of the super-large slewing bearing, and reduces the requirements for processing equipment.

Description

Split super large slewing bearing

technical field

The utility model relates to the field of slewing bearings for marine engineering cranes, in particular to a split type super large slewing bearing. the

Background technique

Offshore engineering cranes are indispensable equipment in offshore oil exploration, offshore engineering construction, offshore wind power installation and offshore salvage operations. the

In recent years, the amount of activity in my country's offshore engineering operations has increased rapidly, and the demand for offshore engineering cranes with a scale of more than 1,000 tons has become increasingly urgent. The slewing bearing is the key mechanical component unit of the slewing mechanism of marine engineering cranes. Its design and manufacture face many challenges. This technical problem is one of the key technologies that this type of mainframe urgently needs to break through. the

The slewing bearings for marine engineering cranes are installed in the slewing mechanism at the lower end of the lifting arm. The structure is a combination of three rows of cylindrical rollers. The bearings are subjected to complex radial loads, axial loads and overturning moment loads during operation. The combined effect of the main engine has high requirements on the reliability of the slewing bearing; the operation failure of the slewing bearing will not only cause the main engine to stop for maintenance and bring major economic losses, but even cause major safety accidents. the

For slewing bearings used in thousand-ton marine engineering cranes, in order to meet the needs of its load-carrying capacity, its outer diameter usually exceeds 10m. Slewing bearings of this size are used for the forging of bearing blanks, the machining of bearing parts, and the bearing parts. Heat treatment during production, transshipment during production, and road transportation of finished products have brought great difficulties. the

At present, the size of the slewing bearings produced by domestic bearing companies is usually below 5m, and the slewing bearings with a size exceeding 10m have not been reported in China. There are no processing and transportation problems caused by oversized slewing bearings. . the

Utility model content

In view of the above-mentioned problems, the utility model provides a split super-large slewing bearing structure to solve the processing and transportation problems of the super-large slewing bearing. the

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A split type super large slewing bearing, including inner ring, roller, cage, spacer block, sealing ring and outer ring, the inner ring and outer ring are equipped with corresponding upper raceway, lower raceway and diameter The rollers are assembled in the cavity formed by the upper raceway, lower raceway and radial raceway of the inner and outer rings, and the rollers in the upper raceway and the lower raceway are separated by a cage. The rollers in the radial raceway are isolated by spacers. Sealing rings are installed on the upper and lower ends of the cavity to isolate the cavity from the outside world. The outer ring is composed of three equally divided ring segments connected end to end, adjacent to each other. The overlapping structure is adopted between the two sections, and the butt joint surface between two adjacent sections forms an angle of 6° with the radial direction of the slewing bearing. The inner ring is composed of an upper inner ring and a lower inner ring, and the upper inner ring and the lower inner ring The inner ring is composed of three equally divided ring sections connected end to end, and the butt joint surface between two adjacent sections forms an included angle of 6° with the radial direction of the slewing bearing;

The butt joint surfaces between the ring segments of the upper inner ring and the ring segments of the lower inner ring are staggered at an angle of 60° on the circumference, and the six ring segments forming the upper inner ring and the lower inner ring pass through 6 screws connected together.

The beneficial effects of the utility model:

The split-type super large slewing bearing of the utility model adopts a third-half structure, which solves the difficult problems in the processing and transportation of the super large slewing bearing, and reduces the requirements for processing equipment;

The inner and outer rings of the slewing bearings adopt a three-section structure, which greatly reduces the size and scale of the slewing bearings for processing and transportation without affecting the load-bearing performance of the bearings;

The ring sections of the inner ring and the outer ring of the slewing bearing are connected by a lap joint structure, which is connected by screws and taper pins. This method is simple in structure, compact in layout, saves space, and saves the connecting plate, achieving a higher Good results;

The butt joint surfaces of the ring segments of the inner ring and outer ring of the slewing bearing form an included angle of 6° with the radial direction of the slewing bearing, which avoids the influence of the butt joint surface of the raceway when the rollers pass on the raceway, and reduces the friction of the raceway. Probability of premature fatigue failure at the interface location;

The butt joint surfaces between the ring segments of the upper inner ring and the lower inner ring segments of the slewing bearing are staggered at an angle of 60° on the circumference, and the six ring segments that make up the upper inner ring and the lower inner ring pass through 6 screws are connected as a whole, this design can effectively improve the connection tightness of each ring segment, thereby improving the strength.

Description of drawings

Fig. 1 Schematic diagram of the structure of the utility model;

Fig. 2 is a schematic diagram of the structure of the utility model divided into three equal parts;

Figure 3 Lap joint structure between ring segments;

Figure 4 Butt angle between ring segments ;

Fig. 5 is a schematic diagram of the structure of the outer ring of the utility model;

Fig. 6 Schematic diagram of the structure of the inner ring of the utility model;

Reference signs: 1. Upper inner ring, 2. Lower inner ring, 3. Radial rollers, 4. Radial spacer, 5. First sealing ring, 6. Second sealing ring, 7. Upper row of rollers , 8. Upper row of cages, 9. Lower row of rollers, 10. Lower row of cages, 11. Third sealing ring, 12. Outer ring, 13. First ring segment, 14. Hexagon socket bolts, 15. Cone Pin, 16, stitching seam, 17, the second ring segment.

Detailed ways

The utility model is further elaborated below in conjunction with specific embodiments. the

A split type super large slewing bearing, including inner ring, roller, cage, spacer block, sealing ring and outer ring, the inner ring and outer ring are equipped with corresponding upper raceway, lower raceway and diameter The rollers are assembled in the cavity formed by the upper raceway, lower raceway and radial raceway of the inner and outer rings, and the rollers in the upper raceway and the lower raceway are separated by a cage. The rollers in the radial raceway are isolated by spacers. Sealing rings are installed on the upper and lower ends of the cavity to isolate the cavity from the outside world. The outer ring is composed of three equally divided ring segments connected end to end, adjacent to each other. The overlapping structure is adopted between the two sections, and the butt joint surface between two adjacent sections forms an angle of 6° with the radial direction of the slewing bearing. The inner ring is composed of an upper inner ring and a lower inner ring, and the upper inner ring and the lower inner ring The inner ring is composed of three equally divided ring segments connected end to end, and the butt joint surface between two adjacent segments forms an included angle of 6° with the radial direction of the slewing bearing; the butt joint surface between the ring segments of the upper inner ring The butt joint surfaces between the ring segments of the lower inner ring are staggered at an angle of 60° on the circumference, and the six ring segments forming the upper inner ring and the lower inner ring are connected as a whole by 6 screws. the

As shown in the figure: the utility model includes an upper inner ring 1, a lower inner ring 2, radial rollers 3, an upper row of rollers 7, a lower row of rollers 9, an upper row of cages 8, a lower row of cages 10, a radial To the spacer block 4, the first sealing ring 5, the second sealing ring 6, the third sealing ring 11 and the outer ring 12, among them, the upper row of rollers mainly bear the axial load acting downward, and the lower row of rollers mainly bear the axial load The overturning moment of the bearing overturning, the radial rollers mainly bear the radial load in the horizontal direction; the main structural parameters of the bearing are as follows: the diameter of the center circle of the upper row of rollers is 9600 mm, the diameter of the upper row of rollers is 130 mm, and the diameter of the upper row of rollers The length is 150mm, the number of rollers in the upper row is 190, the diameter of the center circle of the rollers in the lower row is 9400 mm, the diameter of the rollers in the lower row is 100 mm, the length of the rollers in the lower row is 120 mm, the number of rollers in the lower row is 230, and the diameter The diameter of the center circle of the radial rollers is 9360 mm, the diameter of the radial rollers is 50 mm, the length of the radial rollers is 80 mm, and the number of radial rollers is 498; in the upper raceway and the lower raceway, the rollers are assembled in the inner ring In the cavity formed by the raceway surface of the outer ring and the outer ring, the rollers are separated by a segmented cage along the circumferential direction of the bearing; In the cavity formed by the raceway surface, along the circumferential direction of the bearing, the rollers are isolated by radial spacers; sealing rings are installed at the upper and lower ends of the internal cavity of the bearing to separate the internal cavity of the bearing from the The outside world is isolated; gear teeth are designed on the outer circle of the outer ring of the bearing; the outer ring of the bearing is designed with axial through holes uniformly distributed along the circumference, and the inner ring of the bearing is designed with axial holes uniformly distributed along the circumference Through holes, these holes are used for the installation and connection of the bearing and the host;

The split super-large slewing bearing adopts a three-equal structure, as shown in Figure 2;

The outer ring of the slewing bearing is composed of three ring segments, the three ring segments are connected end to end, and the adjacent two segments adopt a lap joint structure and are connected by screws and conical pins, as shown in Figure 3; The butt joint surface between the segments forms an included angle of 6° with the radial direction of the slewing bearing, as shown in Figures 4 and 5;

The inner ring of the slewing bearing is composed of an upper inner ring and a lower inner ring. The upper inner ring is composed of three equally divided ring segments. Angle, the lower inner ring is composed of three equally divided ring segments, the butt joint surface between two adjacent segments forms an included angle of 6° with the radial direction of the slewing bearing, the butt joint surface between the ring segments of the upper inner ring and the lower The butt joint surfaces between the ring segments of the inner ring are staggered at an angle of 60° on the circumference, and the six ring segments that make up the upper inner ring and the lower inner ring are connected as a whole by 6 screws, as shown in Figures 4 and 6.

Claims (2)

1. A split type super large slewing bearing, including inner ring, roller, cage, spacer, sealing ring and outer ring, the inner ring and outer ring are equipped with corresponding upper raceway and lower raceway And the radial raceway, the rollers are assembled in the cavity formed by the upper raceway, lower raceway and radial raceway of the inner ring and outer ring, and the rollers in the upper raceway and the lower raceway are separated by a cage Isolation, the rollers in the radial raceway are isolated by isolation blocks, and the upper and lower ends of the cavity are respectively equipped with sealing rings to isolate the cavity from the outside world, characterized in that: the outer ring is composed of three equal parts connected end to end Composed of ring segments, the overlapping structure is adopted between two adjacent segments, and the butt joint surface between adjacent two segments forms an included angle of 6° with the radial direction of the slewing bearing, and the inner ring is composed of an upper inner ring and a lower inner ring , the upper inner ring and the lower inner ring are respectively composed of three equally divided ring segments connected end to end, and the butt joint surface between adjacent two segments forms an included angle of 6° with the radial direction of the slewing bearing. 2. A split type super large slewing bearing as claimed in claim 1, characterized in that: the butt joint surfaces between the ring segments of the upper inner ring and the butt joint faces between the ring segments of the lower inner ring are on the circumference The upper and lower inner rings are staggered at an angle of 60°, and the six ring segments forming the upper inner ring and the lower inner ring are connected as a whole by 6 screws.