Anti-static bearing suitable for geological exploration environment

Abstract

The anti-static bearing suitable for the geological exploration environment comprises a bearing outer ring and a bearing inner ring matched with the bearing outer ring, an inner ball groove is formed in the middle of the inner side of the bearing outer ring, an outer ball groove is formed in the middle of the outer side of the bearing inner ring, and two half retainers are arranged between the inner ball groove and the outer ball groove; according to the deep groove ball bearing for geological exploration, the spring needle assembly is installed between the inner ring and the outer ring, the inner ring is provided with a plurality of semi-retainers, a plurality of steel balls which are evenly distributed are installed between the two semi-retainers, and the edge of the inner side of the bearing outer ring is provided with a spring needle limiting groove. The copper gold-plated spring needle can ensure seamless connection between the inner ring and the outer ring of the bearing on one hand, and has excellent conductivity on the other hand, static electricity generated by friction in the working process can be timely led out, electrostatic sparks are prevented from being generated, flammable and explosive gas in a well drilling is prevented from being ignited, potential safety hazards are reduced, and the service life of the bearing is prolonged. And the safety of drilling construction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bearings for drilling equipment, in particular to an antistatic bearing suitable for geological exploration environments. Background Art

[0002] In recent years, with the continuous development of science and technology and the country's emphasis on energy resources, the scale of the drilling equipment market has continued to expand, and the demand for bearing steel for drilling equipment has also increased year by year. Drilling equipment is widely used and of great significance in the fields of petroleum, mining and geological exploration. Drilling bearings are key components in drilling rigs. They mainly bear rotation and propulsion forces, allowing the drill rod and drill bit to rotate and pass through the formation. High-strength, wear-resistant and corrosion-resistant drilling bearings can significantly improve the performance and life of drilling equipment. Because drilling operations are usually carried out in complex and harsh environments, such as high temperature, high pressure, corrosive media and high vibration, under these extreme conditions, drilling bearings are subjected to huge loads and friction, and are susceptible to wear, corrosion and fatigue. They are one of the common wearing parts in drilling rigs and need to be replaced and maintained regularly to ensure their normal operation. At present, common bearings are mainly composed of inner rings, outer rings, limit frames and balls. The above common types of deep groove ball bearings for geological exploration have the following problems in actual applications:

[0003] In a geological exploration environment, since flammable and explosive gases are easily produced in geological mineral layers, traditional steel bearings are prone to static electricity in the rings during continuous rotation and friction. The sparks generated by static electricity can easily ignite flammable and explosive gases, thereby causing engineering accidents and posing certain safety hazards. Summary of the invention

[0004] The object of the present invention is to provide an antistatic bearing suitable for geological exploration environments, so as to solve the problem that the existing deep groove ball bearings mentioned in the above background technology do not have an antistatic effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an antistatic bearing suitable for geological exploration environment, comprising a bearing outer ring and a bearing inner ring matching the bearing outer ring, an inner ball groove is provided in the middle of the inner side of the bearing outer ring, an outer ball groove is provided in the middle of the outer side of the bearing inner ring, two semi-retaining frames are provided between the inner ball groove and the outer ball groove, a plurality of evenly distributed steel balls are installed between the two semi-retaining frames, a spring pin limiting groove is provided at the edge of the inner side of the bearing outer ring, a spring pin assembly for bearing conductivity is fixedly installed inside the spring pin limiting groove, and a rolling groove is provided at the edge of the outer side of the bearing inner ring.

[0006] Preferably, the spring needle assembly includes a needle tube and a tube seat fixedly arranged at the bottom end of the needle tube, a spring is fixedly installed inside the needle tube, a ceramic ball is fixedly arranged at the top end of the spring, a needle shaft is slidably arranged at the top end of the needle tube, a conductive ball is arranged at the top end of the needle shaft, an anti-slip head is fixedly arranged at the bottom end of the needle shaft, and the conductive ball is contact-connected to the inside of the rolling groove. The gold-plated copper spring needle can ensure seamless connection between the inner ring and the outer ring of the bearing on the one hand, and has excellent conductive performance on the other hand, which can effectively avoid the generation of electric sparks.

[0007] Preferably, a fastening hole is provided on the outer surface of the bearing outer ring, a first rivet is provided inside the fastening hole, and the first rivet passes through the bearing outer ring and is fixedly connected to the tube seat; this facilitates locking and fixing of the spring pin assembly, and is stable and reliable.

[0008] Preferably, the needle tube and the needle shaft are both made of brass material, and the surfaces of the needle tube and the needle shaft are provided with nickel plating and gold plating layers, the length and diameter of the needle tube are 8 mm and 2±0.03 mm respectively, the length and diameter of the needle shaft are set to 3 mm and 1.4±0.03 mm respectively, and the spring is made of stainless steel material.

[0009] Preferably, the semi-retainer includes a stainless steel retainer and twelve pockets arranged on the stainless steel retainer, a rivet hole is opened between two adjacent pockets, a second rivet is arranged inside the rivet hole, the inner ring diameter and the outer ring diameter of the stainless steel retainer are set to 50.4±0.095mm and 57.6±0.095mm respectively, and the maximum radius of the pocket is set to 0.5mm.

[0010] Preferably, the second rivet comprises a rivet column and a sinker fixedly provided at one end of the rivet column, an end portion is fixedly provided at one end of the sinker, and a guide head is fixedly provided at the other end of the rivet column.

[0011] Preferably, fillet rings are provided on both sides of the bearing outer ring, the width of the bearing outer ring is set to 17±0.12mm, the inner and outer ring diameters of the bearing outer ring are set to 59±0.05mm and 72±0.013mm respectively, and the width of the fillet ring is set to 0.3±0.1mm.

[0012] Preferably, the width of the bearing inner ring is set to 17±0.12 mm, the inner and outer ring diameters of the bearing outer ring are set to 35±0.012 mm and 48.8±0.003 mm respectively, and the arc radius of the outer ball groove is set to 4.08±0.04 mm.

[0013] Preferably, twelve steel balls are provided, and the twelve steel balls are evenly distributed between the outer ball groove and the inner ball groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The deep groove ball bearing for geological exploration has a spring needle assembly installed between the inner ring and the outer ring. The copper gold-plated spring needle can ensure the seamless connection between the inner ring and the outer ring of the bearing. On the other hand, it has excellent electrical conductivity and can timely conduct the static electricity generated by friction during the working process to avoid the generation of static sparks, thereby preventing the ignition of flammable and explosive gases in the drilling process, reducing safety hazards and improving the safety of drilling construction.

[0016] The spring needle consists of three parts: a needle tube, a needle shaft and an internal spring structure. The needle tube is set on the outer ring of the bearing, and the needle shaft is set on the inner ring of the bearing. It is in close contact with the inner ring of the bearing by rolling, and the contact is close, with significant anti-static effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the antistatic bearing of the present invention;

[0018] Figure 2 is a front cross-sectional view of the antistatic bearing of the present invention;

[0019] Figure 3 is a front cross-sectional view of the outer ring of the bearing of the present invention;

[0020] Figure 4 It is a front cross-sectional view of the inner ring of the bearing of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the spring pin assembly of the present invention;

[0022] Figure 6 It is a partial structural schematic diagram of the semi-cage of the present invention;

[0023] Figure 7 It is a schematic diagram of the unfolded structure of the semi-cage of the present invention;

[0024] Figure 8 It is a front cross-sectional view of the second rivet of the present invention.

[0025] In the figure: 1. outer ring of bearing; 2. inner ring of bearing; 3. spring needle assembly; 31. tube seat; 32. needle tube; 33. spring; 34. ceramic ball; 35. anti-slip head; 36. needle shaft; 37. conductive ball; 4. first rivet; 5. half cage; 51. stainless steel cage; 52. pocket; 53. rivet hole; 54. second rivet; 541. rivet column; 542. sink; 543. end; 544. guide head; 6. steel ball; 7. rolling groove; 8. fillet ring; 9. inner ball groove; 10. spring needle limit groove; 11. fastening hole; 12. outer ball groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] See also Figure 1-8 The present invention provides an antistatic bearing suitable for geological exploration environment, comprising a bearing outer ring 1 and a bearing inner ring 2 matched with the bearing outer ring 1, an inner ball groove 9 is opened in the middle of the inner side of the bearing outer ring 1, an outer ball groove 12 is opened in the middle of the outer side of the bearing inner ring 2, two semi-retaining frames 5 are arranged between the inner ball groove 9 and the outer ball groove 12, a plurality of evenly distributed steel balls 6 are installed between the two semi-retaining frames 5, a spring needle limiting groove 10 is opened at the edge of the inner side of the bearing outer ring 1, a spring needle assembly 3 for bearing conduction is fixedly installed inside the spring needle limiting groove 10, a rolling groove 7 is opened at the edge of the outer side of the bearing inner ring 2, twelve steel balls 6 are arranged, and the twelve steel balls 6 are evenly distributed between the outer ball groove 12 and the inner ball groove 9.

[0028] See also Figure 1 , Figure 2 and Figure 5 , further, the spring needle assembly 3 includes a needle tube 32 and a tube seat 31 fixedly arranged at the bottom end of the needle tube 32, a spring 33 is fixedly installed inside the needle tube 32, a ceramic ball 34 is fixedly arranged at the top of the spring 33, a needle shaft 36 is slidably arranged at the top of the needle tube 32, a conductive ball 37 is arranged at the top of the needle shaft 36, an anti-slip head 35 is fixedly arranged at the bottom end of the needle shaft 36, the conductive ball 37 is contacted and connected to the inside of the rolling groove 7, a fastening hole 11 is opened on the outer surface of the bearing outer ring 1, a first rivet 4 is arranged inside the fastening hole 11, the first rivet 4 passes through the bearing outer ring 1 and is fixedly connected to the tube seat 31, the needle tube 32 and the needle shaft 36 are both made of brass material, and the surfaces of the needle tube 32 and the needle shaft 36 are provided with a nickel plating layer and a gold plating layer, the length and diameter of the needle tube 32 are 8mm and 2±0.03mm respectively, the length and diameter of the needle shaft 36 are set to 3mm and 1.4±0.03mm respectively, and the spring 33 is made of stainless steel material;

[0029] When in use, under the elastic force of the spring 33, the needle shaft 36 will be in close contact with the needle tube 32, thereby forming a current transmission channel to ensure that the current is transmitted from the contact end of the needle shaft 36 to the contact end of the needle tube 32. The needle shaft 36 contacts the bearing inner ring 2 through the conductive ball 37. The conductive ball 37 rolls inside the rolling groove 7, thereby guiding the static electricity generated by friction on the surface of the bearing inner ring 2. The needle shaft 36 and the needle tube 32 are both made of copper, and the surface is nickel-plated and gold-plated so that a stable current can be transmitted. The spring 33 provides the necessary contact force;

[0030] The brass model used for the needle shaft 36 and the needle tube 32 is C3604, the maximum working current is 1.5A, the contact impedance is 100 milliohms, the maximum stroke between the needle shaft 36 and the needle tube 32 is 3mm, the working height is 9±0.1mm, the working elastic force is 100G±20%, the mechanical life is greater than 30,000 times, and it can work in an environment of temperature -40℃-120℃ and humidity 10%RH-90%RH.

[0031] See also Figure 1 , Figure 2 , Figure 6 and Figure 7 Further, the semi-cage 5 includes a stainless steel cage 51 and twelve pockets 52 arranged on the stainless steel cage 51, a rivet hole 53 is opened between two adjacent pockets 52, a second rivet 54 is arranged inside the rivet hole 53, the inner ring diameter and the outer ring diameter of the stainless steel cage 51 are set to 50.4±0.095mm and 57.6±0.095mm respectively, the maximum radius of the pocket 52 is set to 0.5mm, the second rivet 54 includes a rivet column 541 and a sink 542 fixedly arranged at one end of the rivet column 541, an end 543 is fixedly arranged at one end of the sink 542, and a guide head 544 is fixedly arranged at the other end of the rivet column 541;

[0032] When in use, there are two half retainers 5, which are fixed by multiple second rivets 54. A pocket 52 is provided between two adjacent second rivets 54. The steel ball 6 is confined in the pocket 52 and can rotate inside the pocket 52. The rivet head of the second rivet 54 is freely inlaid, and there is no black skin, cracks, interlayer, or rust defects on the surface. The coaxiality of the end 543 and the rivet column 541 to the center line is less than 0.08, and the inclination of the nail axis to the reference A is 52°.

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , further, fillet rings 8 are provided on both sides of the bearing outer ring 1, the width of the bearing outer ring 1 is set to 17±0.12mm, the inner and outer ring diameters of the bearing outer ring 1 are set to 59±0.05mm and 72±0.013mm respectively, the width of the fillet ring 8 is set to 0.3±0.1mm, the width of the bearing inner ring 2 is set to 17±0.12mm, the inner and outer ring diameters of the bearing outer ring 1 are set to 35±0.012mm and 48.8±0.003mm respectively, and the arc radius of the outer ball groove 12 is set to 4.08±0.04mm;

[0034] During use, from the perspective of the service process and service environment of bearings for drilling equipment, technical innovations are carried out at two levels: bearing accessories, rings, rolling elements and bearing assembly. The technical dimensions of the bearings are adjusted. From the perspective of bearing accessories, technical innovations are carried out on the preparation and processing of bearing rings and steel balls 6, and the microstructure of the material evolves. The processing and heat treatment processes are optimized and regulated, and high dimensional stability and high-performance wear-resistant bearing rings and steel balls 6 are proposed to ensure the dimensional accuracy and fatigue life of the bearing rings. From the perspective of bearing assembly, technical innovations are carried out on the assembly process accuracy and various links of the bearings. Combined with the service environment and status of the drilling equipment, the dimensional stability of the bearings during application is guaranteed, and the service life of the bearings during service is increased.

[0035] When the embodiment of the present application is in use: the bearing inner ring 2 can rotate on the inner side of the bearing outer ring 1, the steel ball 6 is limited in the pocket 52, and is evenly distributed and limited between the inner ball groove 9 and the outer ball groove 12. During the rotation of the bearing inner ring 2, under the elastic force of the spring 33, the needle shaft 36 will be in close contact with the needle tube 32, and the conductive ball 37 will roll inside the rolling groove 7, thereby forming a current transmission channel so that a stable current can be transmitted, thereby avoiding the generation of static sparks, preventing the flammable and explosive gases in drilling from being ignited, and reducing safety hazards.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An antistatic bearing suitable for use in a geological prospecting environment, comprising a bearing outer ring (1) and a bearing inner ring (2) matching the bearing outer ring (1), characterized in that: An inner ball groove (9) is provided in the middle of the inner side of the bearing outer ring (1), an outer ball groove (12) is provided in the middle of the outer side of the bearing inner ring (2), two semi-retaining frames (5) are provided between the inner ball groove (9) and the outer ball groove (12), a plurality of evenly distributed steel balls (6) are installed between the two semi-retaining frames (5), a spring needle limiting groove (10) is provided on the inner edge of the bearing outer ring (1), a spring needle assembly (3) for bearing conduction is fixedly installed inside the spring needle limiting groove (10), and a rolling groove (7) is provided on the outer edge of the bearing inner ring (2).

2. The antistatic bearing suitable for geological exploration environment according to claim 1, characterized in that: The spring needle assembly (3) comprises a needle tube (32) and a tube seat (31) fixedly arranged at the bottom end of the needle tube (32); a spring (33) is fixedly installed inside the needle tube (32); a ceramic ball (34) is fixedly arranged at the top end of the spring (33); a needle shaft (36) is slidably arranged at the top end of the needle tube (32); a conductive ball (37) is arranged at the top end of the needle shaft (36); an anti-slip head (35) is fixedly arranged at the bottom end of the needle shaft (36); and the conductive ball (37) is contact-connected to the inside of the rolling groove (7).

3. The antistatic bearing suitable for geological exploration environment according to claim 2 is characterized in that: The outer surface of the bearing outer ring (1) is provided with a fastening hole (11), the interior of the fastening hole (11) is provided with a first rivet (4), and the first rivet (4) passes through the bearing outer ring (1) and is fixedly connected to the pipe seat (31).

4. The antistatic bearing suitable for geological exploration environment according to claim 2 is characterized in that: The needle tube (32) and the needle shaft (36) are both made of brass material, and the surfaces of the needle tube (32) and the needle shaft (36) are provided with nickel plating and gold plating layers. The length and diameter of the needle tube (32) are 8 mm and 2±0.03 mm respectively, and the length and diameter of the needle shaft (36) are set to 3 mm and 1.4±0.03 mm respectively. The spring (33) is made of stainless steel material.

5. The antistatic bearing suitable for geological exploration environment according to claim 1 is characterized in that: The semi-cage (5) comprises a stainless steel cage (51) and twelve pockets (52) arranged on the stainless steel cage (51), a rivet hole (53) is provided between two adjacent pockets (52), a second rivet (54) is provided inside the rivet hole (53), the inner ring diameter and the outer ring diameter of the stainless steel cage (51) are respectively set to 50.4±0.095mm and 57.6±0.095mm, and the maximum radius of the pocket (52) is set to 0.5mm.

6. The antistatic bearing suitable for geological exploration environment according to claim 6 is characterized in that: The second rivet (54) comprises a rivet column (541) and a sinker (542) fixedly arranged at one end of the rivet column (541), an end portion (543) being fixedly arranged at one end of the sinker (542), and a guide head (544) being fixedly arranged at the other end of the rivet column (541).

7. The antistatic bearing suitable for geological exploration environment according to claim 1, characterized in that: Fillet rings (8) are provided on both sides of the bearing outer ring (1), the width of the bearing outer ring (1) is set to 17±0.12 mm, the inner and outer ring diameters of the bearing outer ring (1) are set to 59±0.05 mm and 72±0.013 mm respectively, and the width of the fillet ring (8) is set to 0.3±0.1 mm.

8. The antistatic bearing suitable for geological exploration environment according to claim 1, characterized in that: The width of the bearing inner ring (2) is set to 17±0.12 mm, the inner and outer ring diameters of the bearing outer ring (1) are set to 35±0.012 mm and 48.8±0.003 mm respectively, and the arc radius of the outer ball groove (12) is set to 4.08±0.04 mm.

9. The antistatic bearing suitable for geological exploration environment according to claim 1, characterized in that: Twelve steel balls (6) are provided, and the twelve steel balls (6) are evenly distributed between the outer ball groove (12) and the inner ball groove (9).

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