Sealed long-life multi-row thrust ball bearing

Abstract

The utility model discloses a sealed multi-row thrust ball bearing with long service life. A steel ball and a top outer sealing ring are arranged between a top shaft ring and a top seat ring, and a steel ball and a bottom inner sealing ring are arranged between a bottom shaft ring and a bottom seat ring; the inner space ring is of a regular L-shaped structure and is made of spring steel, the transverse edge ring end face of the inner space ring is arranged in the concave ring groove of the lower shaft ring, the outer space ring is of an inverted L-shaped structure and is made of spring steel, and the transverse edge ring end face of the outer space ring is arranged in the concave ring groove of the upper seat ring; and an oil storage cavity is formed among the inner space ring, the outer space ring, the shaft ring, the seat ring, the top outer sealing ring and the bottom inner sealing ring. The inner space ring and the outer space ring which are provided with spring steel can resist impact force; the whole bearing is in a closed state, slurry can be prevented from entering, grease lubrication is guaranteed through the oil storage cavity, and friction of the steel balls when the steel balls are lubricated through the slurry can be reduced; and the total axial force is decomposed through the gap a of each layer, so that the service life of the bearing is prolonged, and the replacement frequency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a sealed long-life multi-row thrust ball bearing. Background Art

[0002] The multi-row thrust ball bearing used in oil drilling rigs consists of an inner ring, an outer ring, a second outer ring, and steel balls. The service life of the bearing is generally about 150 hours. The user requires a service life of 300 hours. The bearing has no sealing device and is lubricated with drilling mud. The bearing wears and damages very seriously, mainly the steel balls. The drilling rig must be lifted from the underground to the ground to replace the steel balls or new bearings after about 100 hours. The user hopes that it can be lifted to the ground and replaced at the same time as other equipment parts within 300 hours, which reduces the number of replacements and improves the efficiency of the drilling rig. Therefore, improving the service life of the bearing is the main issue in the research and development of the bearing structure. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a sealed long-life multi-row thrust ball bearing.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a sealed long-life multi-row thrust ball bearing, including a top shaft ring, a top seat ring, a bottom shaft ring, and a bottom seat ring, a steel ball and a top outer sealing ring are arranged between the top shaft ring and the top seat ring, and a steel ball and a bottom inner sealing ring are arranged between the bottom shaft ring and the bottom seat ring; the inner spacer is a positive L-shaped structure, made of spring steel, and the horizontal side ring end face of the inner spacer is placed in the concave ring groove of the shaft ring below, and the outer spacer is an inverted L-shaped structure, made of spring steel, and the horizontal side ring end face of the outer spacer is placed in the concave ring groove of the seat ring above; an oil storage chamber is formed between the inner spacer, the outer spacer, the shaft ring, the seat ring, the top outer sealing ring, and the bottom inner sealing ring.

[0005] Furthermore, it also includes a middle shaft ring and a middle seat ring, and a steel ball is arranged between the middle shaft ring and the middle seat ring.

[0006] Furthermore, the diameters of the steel balls in each row are the same, and the diameters of the steel balls between rows are the same or different.

[0007] Furthermore, the cross-sectional thickness of the top row of vertical side rings of the outer spacer is the thinnest, the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side rings of the inner spacer is greater than or equal to the thickest cross-sectional thickness of the outer spacer; and the gap a is located on the inner spacer.

[0008] Furthermore, the cross-sectional thickness of the top row of vertical side rings of the inner spacer is the thinnest, the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side rings of the outer spacer is greater than or equal to the thickest cross-sectional thickness of the inner spacer; and the gap a is located on the outer spacer.

[0009] Furthermore, the cross-sectional thickness of the top row of vertical side rings of the outer spacer is the thickest, the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side rings of the inner spacer is greater than or equal to the thickest cross-sectional thickness of the outer spacer; and the gap a is located on the inner spacer.

[0010] Furthermore, the cross-sectional thickness of the top row of vertical side rings of the inner spacer is the thickest, the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side rings of the outer spacer is greater than or equal to the thickest cross-sectional thickness of the inner spacer; and the gap a is located on the outer spacer.

[0011] Furthermore, the inner diameter of the lateral side ring of the inner spacer ring is transitionally matched with the concave ring groove of the shaft ring below.

[0012] Furthermore, the inner diameter of the horizontal side ring of the outer spacer ring is transitionally matched with the concave ring groove of the seat ring above.

[0013] The utility model is provided with inner and outer spacers made of spring steel to resist impact force; the whole bearing forms a closed state through the sealing ring, the shaft ring, the seat ring and the inner and outer spacers, which can prevent mud from entering, and utilizes the oil storage cavity to ensure grease lubrication, which can reduce the friction of the steel ball when lubricated with mud and improve the service life of the bearing; the total axial force is decomposed through the gap a of each layer, which reduces the force of each layer of steel balls, reduces the friction of the shaft ring, the seat ring and the steel balls, improves the service life of the bearing, and reduces the number of replacements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the gap a on the inner spacer ring of the utility model;

[0015] Figure 2 It is a schematic structural diagram of the gap a on the outer spacer ring of the utility model.

[0016] Among them: 1. Top shaft ring; 2. Steel ball; 3. Top outer sealing ring; 4. Inner spacer; 5. Top seat ring; 6. Outer spacer; 7. Oil storage chamber; 8. Middle shaft ring; 9. Middle seat ring; 10. Bottom shaft ring; 11. Bottom seat ring; 12. Bottom inner sealing ring. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 , 2 The specific implementation methods of the utility model are further described.

[0018] A sealed long-life multi-row thrust ball bearing comprises a top shaft ring 1, a top seat ring 5, a bottom shaft ring 10 and a bottom seat ring 11; a steel ball 2 and a top outer sealing ring 3 are arranged between the top shaft ring 1 and the top seat ring 5; a steel ball 2 and a bottom inner sealing ring 12 are arranged between the bottom shaft ring 10 and the bottom seat ring 11; an inner spacer ring 4 is a positive L-shaped structure and is made of spring steel; the end face of the lateral side ring of the inner spacer ring 4 is placed in the concave ring groove of the shaft ring below; the inner diameter of the lateral side ring of the inner spacer ring 4 is transitionally matched with the concave ring groove of the shaft ring below; an outer spacer ring 6 is an inverted L-shaped structure and is made of spring steel; the end face of the lateral side ring of the outer spacer ring 6 is placed in the concave ring groove of the seat ring above; the inner diameter of the lateral side ring of the outer spacer ring 6 is transitionally matched with the concave ring groove of the seat ring above; an oil storage chamber 7 is formed between the inner spacer ring 4, the outer spacer ring 6, the shaft ring, the seat ring, the top outer sealing ring 3 and the bottom inner sealing ring 12. It also includes a middle shaft ring 8 and a middle seat ring 9, and a steel ball 2 is arranged between the middle shaft ring 8 and the middle seat ring 9. The diameters of the steel balls 2 in each row are the same, and the diameters of the steel balls 2 between rows are the same or different. The cross-sectional thickness of the vertical side ring of the top row of the outer spacer 6 is the thinnest, the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side ring of the inner spacer 4 is greater than or equal to the thickest cross-sectional thickness of the outer spacer 6; the gap a is located on the inner spacer 4. The cross-sectional thickness of the vertical side ring of the top row of the inner spacer 4 is the thinnest, the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side ring of the outer spacer 6 is greater than or equal to the thickest cross-sectional thickness of the inner spacer 4; the gap a is located on the outer spacer 6. The cross-sectional thickness of the vertical side ring of the top row of the outer spacer 6 is the thickest, the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side ring of the inner spacer 4 is greater than or equal to the thickest cross-sectional thickness of the outer spacer 6; the gap a is located on the inner spacer 4. The cross-sectional thickness of the top row of vertical side rings of the inner spacer ring 4 is the thickest, and the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side rings of the outer spacer ring 6 is greater than or equal to the thickest cross-sectional thickness of the inner spacer ring 4; the gap a is located on the outer spacer ring 6.

[0019] The shaft ring and the inner spacer 4 rotate or the seat ring and the outer spacer 6 rotate, the seat ring and the outer spacer 6 are stationary or the shaft ring and the inner spacer 4 are stationary, and the steel ball 2 is driven by the shaft ring and rolls between the shaft ring and the seat ring. In order to ensure the radial positioning of the inner spacer 4 and the outer spacer 6, the inner spacer 4 and the outer spacer 6 are embedded in the concave ring of the shaft ring or the seat ring using an L-shaped ring. When installing the equipment, fill the oil storage cavity 7 with lubricating grease. After installation, the bearing is sealed by the sealing ring, the inner spacer 4, the outer spacer 6, the shaft ring, and the seat ring to prevent mud from entering the bearing.

[0020] The inner spacer 4 and the outer spacer 6 are made of spring steel. After the bearing is assembled and pressed, if there is an impact force during operation, the destructive effect of the impact on the bearing can be alleviated through the elastic deformation of the inner spacer 4 and the outer spacer 6.

[0021] The cross-sectional dimensions of the inner spacer 4 and the outer spacer 6 are different, and the axial force acting on the bearing can be decomposed into each row of thrust ball bearings through elastic variables. The magnitude of the force on each row is determined by the dimensions of the inner spacer 4 and the outer spacer 6 and the elastic variables.

[0022] The diameter of the steel balls 2 in each row is the same, but the diameter of the steel balls 2 between rows can be the same or different, which is determined by the position and magnitude of the force. When the forces at both ends of the bearing are large, large steel balls 2 can be used, and when the forces in the middle are small, small steel balls 2 can be used.

[0023] The L-shaped ring of the outer spacer 6, the horizontal ring end and the vertical ring end are respectively pressed against the two adjacent seat rings, and need to be tightened after assembly. The L-shaped ring of the inner spacer 4, the horizontal ring end and the vertical ring end are respectively between the adjacent shaft rings, and each layer has a same or different gap a, and its size is used to determine the distribution value of the axial force, which can be evenly distributed, or unevenly distributed in each layer according to the size of the steel ball 2; the more rows there are, the greater the total axial force that the bearing can bear, and after the total axial force is decomposed, the service life of the bearing will increase exponentially. After the working force outer spacer 6 is deformed, the gap between the inner spacer 4 and the shaft ring disappears, and the bearing forms a closed space, and the mud outside cannot enter the bearing. The grease in the oil storage chamber 7 enters the steel ball 2 through gravity and the internal gap a of the bearing when the bearing is working and rotating, ensuring grease lubrication and increasing the service life of the bearing.

[0024] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. Sealed long-life multi-row thrust ball bearing, characterized by: The invention comprises a top shaft ring (1), a top seat ring (5), a bottom shaft ring (10), and a bottom seat ring (11); a steel ball (2) and a top outer sealing ring (3) are arranged between the top shaft ring (1) and the top seat ring (5); a steel ball (2) and a bottom inner sealing ring (12) are arranged between the bottom shaft ring (10) and the bottom seat ring (11); the inner spacer (4) is a positive L-shaped structure, made of spring steel, and the transverse side ring end face of the inner spacer (4) is placed in the concave ring groove of the shaft ring below; the outer spacer (6) is an inverted L-shaped structure, made of spring steel, and the transverse side ring end face of the outer spacer (6) is placed in the concave ring groove of the seat ring above; an oil storage chamber (7) is formed between the inner spacer (4), the outer spacer (6), the shaft ring, the seat ring, the top outer sealing ring (3), and the bottom inner sealing ring (12).

2. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: It also comprises a middle shaft ring (8) and a middle seat ring (9), and a steel ball (2) is arranged between the middle shaft ring (8) and the middle seat ring (9).

3. The sealed long-life multi-row thrust ball bearing according to claim 1 or 2, characterized in that: The diameters of the steel balls (2) in each row are the same, and the diameters of the steel balls (2) between rows are the same or different.

4. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The cross-sectional thickness of the top row of vertical side rings of the outer spacer (6) is the thinnest, and the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side rings of the inner spacer (4) is greater than or equal to the thickest cross-sectional thickness of the outer spacer (6); and the gap a is located on the inner spacer (4).

5. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The cross-sectional thickness of the top row of vertical side rings of the inner spacer (4) is the thinnest, and the cross-sectional thickness gradually increases, and the cross-sectional thickness of the bottom row is the thickest; the cross-sectional thickness of the vertical side rings of the outer spacer (6) is greater than or equal to the thickest cross-sectional thickness of the inner spacer (4); and the gap a is located on the outer spacer (6).

6. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The cross-sectional thickness of the top row of vertical side rings of the outer spacer (6) is the thickest, and the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side rings of the inner spacer (4) is greater than or equal to the thickest cross-sectional thickness of the outer spacer (6); and the gap a is located on the inner spacer (4).

7. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The cross-sectional thickness of the top row of vertical side rings of the inner spacer (4) is the thickest, and the cross-sectional thickness gradually decreases, and the cross-sectional thickness of the bottom row is the thinnest; the cross-sectional thickness of the vertical side rings of the outer spacer (6) is greater than or equal to the thickest cross-sectional thickness of the inner spacer (4); and the gap a is located on the outer spacer (6).

8. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The inner diameter of the transverse side ring of the inner spacer (4) is transitionally matched with the concave ring groove of the shaft ring below.

9. The sealed long-life multi-row thrust ball bearing according to claim 1, characterized in that: The inner diameter of the horizontal side ring of the outer spacer (6) is transitionally matched with the concave ring groove of the seat ring above.

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