Gearbox structure, power head assembly for horizontal directional drilling machine and horizontal directional drilling machine
By adopting double seals and grease injection design in the gearbox structure of the horizontal directional drill rig, the problem of seal wear caused by mud particles invasion is solved, extending the service life of the seal and improving construction efficiency.
Patent Information
- Application Number
- CN202421342007.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The rotary sealing structure of the existing horizontal directional drill rig is easily invaded by mud particles during the process of replacing the drill rod, resulting in faster seal wear and short service life, affecting construction efficiency.
A gearbox structure is designed, and the structure is strengthened by double seals (seals and dustproof parts), and an oil channel is set up between the seal and dustproof parts, injecting grease to form a grease layer to prevent mud particles from entering.
Effectively prevent internal lubricating oil from flowing out, extend the service life of the seal, reduce the loss of work stoppage caused by oil leakage replacement of sealing structural parts, and improve the reliability of the sealing structure and product competitiveness.
Smart Images
Figure CN222502584U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of horizontal directional drilling, in particular to a gear box structure, a power head assembly for a horizontal directional drilling machine, and a horizontal directional drilling machine. Background Art
[0002] Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of the oil industry with traditional pipeline construction. It is widely used in pipeline laying projects such as water supply, gas, electricity, telecommunications, natural gas, and oil due to its fast construction speed, high precision, and low cost. During the drilling and pulling back process of the horizontal directional drilling rig, the main shaft of the gear box rotates continuously, so a rotating seal structure needs to be set to prevent the lubricating oil in the gear box from flowing out.
[0003] However, in actual use, mud particles will splash out during the replacement of the drill pipe. These mud particles will enter the rotating seal structure, causing abnormal seal wear, a shorter service life, and a high replacement frequency, affecting construction efficiency. Moreover, once the seal fails, the lubricating oil in the gearbox will flow out, greatly affecting the reliability of the seal structure and the competitiveness of the product. Utility Model Content
[0004] The utility model aims to provide a gear box structure, a power head assembly for a horizontal directional drilling rig, and a horizontal directional drilling rig, so as to solve the defects and shortcomings in the prior art.
[0005] In order to achieve the above object, the utility model provides a gear box structure, comprising:
[0006] Box;
[0007] A main shaft is inserted into the box body and is rotatably connected to the box body;
[0008] A sealing member, sleeved on the end of the main shaft, wherein the sealing member is sealingly connected between the main shaft and the box body;
[0009] A dustproof member is sleeved on the end of the main shaft, the dustproof member is sealingly connected between the main shaft and the box body, and the dustproof member is arranged on the outside of the sealing member;
[0010] An oil passage is arranged on the box body, a first end of the oil passage is used for injecting grease, a second end of the oil passage is connected to the outer wall of the main shaft, and the second end of the oil passage is located between the dustproof part and the sealing part.
[0011] The gearbox structure provided by the utility model also includes:
[0012] An oil nozzle is arranged at the first end of the oil passage.
[0013] According to the gear box structure provided by the utility model, the sealing element is a skeleton oil seal, and the lip of the skeleton oil seal faces inwards.
[0014] According to the gear box structure provided by the utility model, the dustproof component is a dustproof sealing ring, and the lip of the dustproof sealing ring faces outwards.
[0015] According to the gear box structure provided by the utility model, one of the inner wall of the box body and the outer wall of the main shaft is provided with a first annular groove, and the sealing member is embedded in the first annular groove.
[0016] According to the gear box structure provided by the utility model, a second annular groove is provided on one of the inner wall of the box body and the outer wall of the main shaft, and the dustproof part is embedded in the second annular groove.
[0017] The gearbox structure provided by the utility model also includes:
[0018] A support bearing is sleeved on the main shaft and connected to the box body. The support bearing is arranged on the inner side of the sealing member.
[0019] According to the gear box structure provided by the utility model, the sealing component, the oil channel and the dustproof component are provided at both ends of the main shaft.
[0020] The utility model also provides a power head assembly for a horizontal directional drilling machine, comprising the gear box structure as described in any one of the above items.
[0021] The utility model also provides a horizontal directional drilling rig, comprising the gear box structure as described in any one of the above items, or comprising the power head assembly for the horizontal directional drilling rig as described in the above items.
[0022] The gearbox structure provided by the utility model includes: a housing; a main shaft, which is inserted into the housing, and the main shaft is rotatably connected to the housing; a seal, which is sleeved on the end of the main shaft, and the seal is sealed and connected between the main shaft and the housing; a dustproof member, which is sleeved on the end of the main shaft, and the dustproof member is sealed and connected between the main shaft and the housing, and the dustproof member is arranged on the outside of the seal; an oil channel, which is arranged on the housing, and the first end of the oil channel is used to inject grease, and the second end of the oil channel is connected to the outer wall of the main shaft, and the second end of the oil channel is located between the dustproof member and the seal. In this way, a double sealing reinforcement structure is formed by the dustproof member and the seal, which can prevent the internal lubricating oil from flowing out, and the dustproof member can prevent the external mud and dust from invading, play a protective role on the internal seal, and reduce the friction damage to the seal. At the same time, grease can be injected between the dustproof member and the seal through the oil channel to form a grease layer on the surface of the main shaft, which can block the movement of the entering mud particles and the like toward the seal. This effectively protects the seals from damage by mud particles, etc., extends their service life, reduces downtime losses caused by replacing sealing structural parts due to oil leakage, improves the reliability of the sealing structure, and enhances the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 It is a schematic diagram of the gear box structure provided by an embodiment of the utility model;
[0025] Figure 2 yes Figure 1 Partial schematic diagram at point A in the middle;
[0026] Reference numerals:
[0027] 1: box body; 2: end cover; 3: cover plate; 4: main shaft; 5: seal; 6: dustproof part; 7: oil channel; 71: first end; 72: second end; 8: oil nozzle; 9: first annular groove; 10: second annular groove; 11: support bearing; 12: bearing seat. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Combine the following Figure 1 to Figure 2 The gearbox structure of the utility model is described.
[0030] like Figure 1 to Figure 2 As shown, the embodiment of the utility model provides a gear box structure suitable for horizontal directional drilling rigs, including a box body, a main shaft 4, a seal 5, a dustproof part 6, and an oil channel 7. Specifically, as Figure 1 As shown, the box body includes a box body main body 1, an end cover 2 and a cover plate 3. The main shaft 4 is penetrated in the box body, and the main shaft 4 is rotatably connected to the box body. Specifically, the main shaft 4 passes through the box body main body 1, and is rotatably connected to the box body main body 1 through a bearing assembly. There are two end covers 2, which are respectively installed at both ends of the box body main body 1 to close the openings at both ends, and the end cover 2 is sleeved on the main shaft 4. There are two cover plates 3, which correspond to the end covers 2 one by one. The cover plate 3 and the end cover 2 can be connected by a bolt assembly, and the cover plate 3 is sleeved on the main shaft 4. Thereby, the box body 1 and the end covers 2 and the cover plate 3 at both ends together form a complete box structure. In addition, the main shaft 4 is used to connect the drill pipe, and a through hole is provided inside it for mud to pass through. It should be noted that mud is an indispensable part of the horizontal directional drilling rig construction process. It is pumped into the hollow drill pipe through a mud pump and finally ejected from the drill bit to play the role of lubrication, cooling, wall protection, and chip removal. And according to the specific construction environment, the mud ratio is different. It is generally used in a circulating filtration, so the mud will contain many mud and gravel particles.
[0031] The seal 5 is sleeved on the end of the main shaft 4, and the seal 5 is sealed between the main shaft 4 and the housing, so that the seal 5 can play a rotating sealing function to prevent the lubricating oil inside the gearbox from flowing out of the housing, so as to ensure its reliable operation. At the same time, the dustproof part 6 is sleeved on the end of the main shaft 4, and the dustproof part 6 is sealed between the main shaft 4 and the housing, and the dustproof part 6 is arranged on the outside of the seal 5, so that on the one hand, the structural sealing performance can be enhanced, and on the other hand, external mud and dust can be prevented from entering, thereby playing a role in protecting the seal 5, and thus improving the sealing reliability of the gearbox. It should be noted that, as shown in the example Figure 1 As for the placement position of the gear box structure shown in the figure, the left and right directions in the figure are the inside and outside directions, and the side facing the middle of the box body is the inside, and the side facing the two ends of the box body is the outside.
[0032] Furthermore, the oil passage 7 is arranged on the box body, such as Figure 2 As shown, the first end 71 of the oil passage 7 is used to inject grease, specifically, butter. The second end 72 of the oil passage 7 is connected to the outer wall of the main shaft 4, and the second end 72 of the oil passage 7 is located between the dustproof member 6 and the seal 5. In this way, when the main shaft 4 rotates, a circle of butter can be coated on the surface of the main shaft 4, and the butter coating area is located between the dustproof member 6 and the seal 5, thereby preventing the incoming mud particles from moving toward the seal 5, increasing its forward resistance, and further protecting the seal 5 from being damaged by mud particles. Specifically, as Figure 1 As shown, the oil passage 7 can be provided through the end cover 2, and the dustproof member 6 and the sealing member 5 are both installed between the end cover 2 and the main shaft 4 to form a gearbox end sealing structure.
[0033] In this way, a double sealing reinforcement structure is formed by the dustproof member 6 and the sealing member 5, which can prevent the internal lubricating oil from flowing out, and the dustproof member 6 can prevent the external mud and dust from invading, play a protective role on the internal sealing member 5, and reduce the friction damage to the sealing member 5. At the same time, grease can be injected between the dustproof member 6 and the sealing member 5 through the oil passage 7 to form a grease layer on the surface of the main shaft 4, which can block the movement of the entering mud particles toward the sealing member 5. In this way, the sealing member 5 is effectively protected from damage by mud particles, etc., and its service life is extended, and the downtime loss caused by replacing the sealing structure due to oil leakage is reduced, the reliability of the sealing structure is improved, and the competitiveness of the product is enhanced.
[0034] In the embodiment of the present utility model, Figure 2 As shown, the gearbox structure further includes an oil nozzle 8, which is arranged at the first end 71 of the oil passage 7. Such arrangement facilitates the injection of butter and can guide and control the inflow of butter.
[0035] In the specific embodiment of the present invention, the oil nozzle 8 is threadedly connected to the first end 71 of the oil passage 7. This arrangement facilitates the installation of the oil nozzle 8 and facilitates daily maintenance and replacement. Figure 2 As shown, the first end 71 of the oil channel 7 is provided with a step surface, and the flange on the oil nozzle 8 abuts against the step surface, so that the oil nozzle 8 can be quickly installed in place and the assembly efficiency is improved.
[0036] As an optional embodiment of the utility model, the seal 5 is a skeleton oil seal, and the lip of the skeleton oil seal faces inward. Such a configuration can play a role of rotary sealing, ensuring that the internal lubricating oil will not leak out of the gear box. In addition, the skeleton oil seal has a certain compensation oil sealing ability, which prolongs its service life and improves the sealing reliability.
[0037] In an optional embodiment of the utility model, the dustproof member 6 is a dustproof sealing ring, and the lip of the dustproof sealing ring faces outward. Such an arrangement can effectively prevent the entry of external particles, protect internal components from damage, and extend the service life of the device.
[0038] In a specific embodiment of the present invention, a first annular groove 9 is provided on one of the inner wall of the box and the outer wall of the main shaft 4, and the seal 5 is embedded in the first annular groove 9. In other words, the inner wall of the box is provided with the first annular groove 9, or the outer wall of the main shaft 4 is provided with the first annular groove 9, for installing the seal 5. Specifically, Figure 2 As shown, a first annular groove 9 can be provided on the inner wall of the end cover 2. Such arrangement facilitates the installation of the sealing member 5, prevents the sealing member from axially sliding, and ensures its reliable operation.
[0039] As an optional embodiment of the present invention, a second annular groove 10 is provided on one of the inner wall of the box body and the outer wall of the main shaft 4, and the dustproof member 6 is embedded in the second annular groove 10. That is, the inner wall of the box body is provided with a second annular groove 10, or the outer wall of the main shaft 4 is provided with a second annular groove 10, for assembling the dustproof member 6. Generally, as Figure 2 As shown, a second annular groove 10 can be provided on the inner wall of the end cover 2 to facilitate processing without damaging the structural performance of the main shaft 4. With such an arrangement, the dustproof member 6 can be quickly positioned and installed, thereby improving installation efficiency.
[0040] In an optional embodiment of the present utility model, the gearbox structure further includes a support bearing 11, which is sleeved on the main shaft 4 and connected to the box body, and is arranged on the inner side of the seal 5. Specifically, Figure 1 As shown, the gearbox structure also includes a bearing seat 12, which is used to fix the support bearing 11. The bearing seat 12 is arranged between the end cover 2 and the box body 1, and can be connected and fixed by bolt assemblies. In this way, the support bearing 11 is used in conjunction with the seal 5 to form a rotary sealing structure, which can adapt to the use scenario of high-speed rotation.
[0041] In a specific embodiment of the present invention, Figure 1 As shown, both ends of the main shaft 4 are provided with sealing members 5, oil passages 7 and dustproof members 6. Such arrangement forms a double-end face sealing form, which can provide more excellent sealing performance and effectively improve the reliability and service life of the equipment.
[0042] The power head assembly for a horizontal directional drilling rig provided by the present invention is described below. The power head assembly for a horizontal directional drilling rig described below and the gear box structure described above can be referred to each other.
[0043] The embodiment of the utility model also provides a power head assembly for a horizontal directional drilling rig, including a gearbox structure as described in the above embodiments. With such a configuration, a double sealing reinforcement structure is formed by the dustproof member 6 and the seal 5, which can prevent the internal lubricating oil from flowing out, and the dustproof member 6 can prevent the external mud and dust from invading, thereby protecting the internal seal 5 and reducing the friction damage to the seal 5. At the same time, grease can be injected between the dustproof member 6 and the seal 5 through the oil passage 7 to form a grease layer on the surface of the main shaft 4, which can block the movement of the entering mud particles and the like toward the seal 5. Thereby, the seal 5 is effectively protected from damage by mud particles and the like, its service life is extended, the downtime loss caused by replacing the sealing structure due to oil leakage is reduced, the reliability of the sealing structure is improved, and the competitiveness of the product is enhanced. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the above-mentioned gearbox structure, so it will not be repeated here.
[0044] The horizontal directional drilling rig provided by the present invention is described below. The horizontal directional drilling rig described below and the gear box structure and the power head assembly for the horizontal directional drilling rig described above can correspond to each other.
[0045] The embodiment of the utility model also provides a horizontal directional drilling machine, including the gearbox structure as in the above-mentioned embodiments, or including the power head assembly for the horizontal directional drilling machine as in the above-mentioned embodiments. In this way, the dustproof member 6 and the seal 5 form a double sealing reinforcement structure, which can prevent the internal lubricating oil from flowing out, and the dustproof member 6 can prevent the external mud and dust from invading, play a protective role on the internal seal 5, and reduce the friction damage to the seal 5. At the same time, grease can be injected between the dustproof member 6 and the seal 5 through the oil passage 7 to form a grease layer on the surface of the main shaft 4, which can block the movement of the entering mud particles toward the seal 5. Thereby, the seal 5 is effectively protected from damage by mud particles, etc., its service life is extended, the downtime loss caused by replacing the sealing structure due to oil leakage is reduced, the reliability of the sealing structure is improved, and the competitiveness of the product is enhanced. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the above-mentioned gearbox structure, so it will not be repeated here.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A gear box structure, characterized in that: include: Box; A main shaft (4) is inserted into the box body, and the main shaft (4) is rotatably connected to the box body; A sealing member (5) is sleeved on the end of the main shaft (4), and the sealing member (5) is sealingly connected between the main shaft (4) and the box body; A dustproof member (6) is sleeved on the end of the main shaft (4), the dustproof member (6) is sealingly connected between the main shaft (4) and the box body, and the dustproof member (6) is arranged on the outside of the sealing member (5); An oil passage (7) is arranged on the box body, a first end (71) of the oil passage (7) is used for injecting grease, a second end (72) of the oil passage (7) is connected to the outer wall of the main shaft (4), and the second end (72) of the oil passage (7) is located between the dustproof part (6) and the sealing part (5).
2. The gearbox structure according to claim 1, characterized in that: Also includes: An oil nozzle (8) is arranged at the first end (71) of the oil passage (7).
3. The gearbox structure according to claim 1, characterized in that: The sealing element (5) is a skeleton oil seal, and the lip of the skeleton oil seal faces inwards.
4. The gearbox structure according to claim 1, characterized in that: The dustproof part (6) is a dustproof sealing ring, and the lip of the dustproof sealing ring faces outwards.
5. The gearbox structure according to claim 1, characterized in that: A first annular groove (9) is provided on one of the inner wall of the box body and the outer wall of the main shaft (4), and the sealing member (5) is embedded in the first annular groove (9).
6. The gearbox structure according to claim 1, characterized in that: A second annular groove (10) is provided on one of the inner wall of the box body and the outer wall of the main shaft (4), and the dustproof part (6) is embedded in the second annular groove (10).
7. The gearbox structure according to claim 1, characterized in that: Also includes: A support bearing (11) is sleeved on the main shaft (4), and the support bearing (11) is connected to the box body. The support bearing (11) is arranged on the inner side of the sealing member (5).
8. The gearbox structure according to claim 1, characterized in that: The sealing component (5), the oil passage (7) and the dustproof component (6) are provided at both ends of the main shaft (4).
9. A power head assembly for a horizontal directional drilling rig, characterized in that: Comprising a gearbox structure as described in any one of claims 1-8.
10. A horizontal directional drilling machine, characterized in that: It comprises the gear box structure as described in any one of claims 1 to 8, or comprises the power head assembly for a horizontal directional drilling rig as described in claim 9.