Novel top drive gearbox

Abstract

The utility model discloses a novel top drive gear box which comprises a box body, a box cover is installed at the top end of the box body, and a spraying system comprises a first oil spraying pipe, a second oil spraying pipe, a third oil spraying pipe and a fourth oil spraying pipe. The first oil spraying pipe, the second oil spraying pipe, the third oil spraying pipe and the fourth oil spraying pipe are arranged between the multiple sets of first-level small gears and the multiple sets of second-level large gears, an oil storage pool is arranged at the bottom end of the box body, and two sets of lubricating pumps are connected to the outer surface of the oil storage pool. Therefore, the balance of the reduction gearbox is optimized, the problem that a top drive needs to be additionally provided with a counter weight is solved, and the whole gearbox body is in a shape similar to an oil pouring pot. By means of the design, effective spraying lubrication of the spraying system on the gear is greatly promoted, and it is ensured that the gear can be fully lubricated under the complex working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field, concretely is a novel top drive gear box. BACKGROUND

[0002] The full name of top drive is top drive drilling device TDS (TOP DRIVE DRILLING SYSTEM), and it is a kind of top drive drilling system that is developed successively by USA, France and Norway in recent years.It can rotate drill pipe directly from upper space of derrick, is sent down along special guide rail, completes drill pipe rotation drilling, circulates drilling fluid, connects stand, unloads buckle and reverses eyelet and the drilling operation of multiple drilling operations such as top drive drilling device significantly improves the ability and efficiency of drilling operation, and has become the standard product of petroleum drilling industry.Since the beginning of the 80s of the 20th century, it has developed into the most advanced integrated top drive drilling device IDS (INTEGRATED TOP DRIVE DRILLING SYSTEM), and it is one of the outstanding stages of achievements in the development of current drilling equipment automation update.

[0003] The reduction gearbox structure unit is the important transmission component indispensable in top drive drilling device, at present, the reduction gearbox structure used by top drive device adopts two-stage gear transmission structure, gear lubrication uses lubricating oil spraying and immersion lubrication, and oil spraying oil storage pool is at the bottom of gear box, and when the lubricating oil of spraying is not enough to lubricate gear, it will cause gear grinding, and reduce the service life of gear, and the oil storage pool at the bottom of gear box will also cause overall imbalance, and counterweight needs to be added at top drive guardrail;The lubricating oil of immersion lubrication needs good sealing in gear box, if sealing fails, it will cause lubricating oil leakage, affect gear lubrication, reduce the service life of gear, and the lubricating oil in the whole gear box will also cause overall imbalance, and counterweight needs to be added at top drive guardrail.

[0004] Therefore, it is necessary to develop a novel top drive reduction gearbox, ensure lubrication while considering the balance of top drive, increase the service life of gear, and reduce cost. UTILITY MODEL CONTENT

[0005] (I) utility model purpose

[0006] Therefore, the utility model aims at providing a novel top drive gear box, and solves the problems in the above background.

[0007] (II) technical scheme

[0008] The utility model provides a novel top drive gear box, including the box body, the top end of box body is equipped with the box cover, the inner wall of box body is provided with primary gear wheel, spraying system, multiple group primary pinion and multiple group secondary gear wheel, and the middle end of box body is provided with the main shaft, the spraying system includes first oil injection pipe, second oil injection pipe, third oil injection pipe and fourth oil injection pipe, and first oil injection pipe, second oil injection pipe, third oil injection pipe and fourth oil injection pipe are arranged between multiple group primary pinion and multiple group secondary gear wheel, the bottom of box body is provided with storage oil pool, and the outer surface of storage oil pool is connected with two groups lubricating pump, one end of two groups lubricating pump is connected with the delivery pipe, and the delivery pipe is installed on the other side bottom of box body, and the delivery pipe is connected with first oil injection pipe, second oil injection pipe, third oil injection pipe and fourth oil injection pipe.

[0009] Preferably, the bottom end of the main shaft is provided with a bearing pad, an outer oil retaining ring, an inner oil retaining ring and a skeleton oil seal.

[0010] Preferably, the inner wall of the bottom end of the box is provided with an inner sleeve.

[0011] Preferably, the inner wall of the middle end of the box is provided with a self-aligning bearing.

[0012] Preferably, the inner wall of the top end of the box is provided with an anti-jump bearing.

[0013] Preferably, the box cover is connected to the box by a plurality of bolts.

[0014] From the above technical solution, the present application has the following beneficial effects:

[0015] 1. The storage oil pool is ingeniously designed at the obliquely downward position of the box body, thereby optimizing the balance of the reduction gearbox, avoiding the problem of additional counterweight required by the top drive, and also making the entire box body present a shape similar to an inverted oil can. Such design greatly promotes the effective spraying and lubrication of the gears by the spraying system, ensuring that the gears can also be fully lubricated under complex working conditions. At the same time, part of the gears are 1 / 3 immersed in lubricating oil, which not only reduces the risk of sealing failure of the sealing device under complex working conditions, but also effectively reduces the risk of oil leakage. Through the precise delivery of the lubricating pump, the four oil injection pipes can uniformly spray lubricating oil onto the meshing parts of each gear, achieving comprehensive and effective lubrication and improving the lubrication efficiency.

[0016] 2. The gears of the reduction gearbox are partially immersed in lubricating oil, and the continuous spraying and lubrication of the spraying system further reduces the risk of oil leakage caused by sealing failure under complex working conditions. This design not only enhances the sealing performance of the gear box, but also effectively prevents the problem of dry grinding of the gears caused by oil leakage or failure of the single lubrication system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the first three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is the second three-dimensional structure schematic view of the utility model;

[0019] Figure 3 It is the internal structure schematic view of the utility model;

[0020] Figure 4 It is the first cross section structure schematic view of the utility model;

[0021] Figure 5 It is the second cross section structure schematic view of the utility model.

[0022] In the drawing: 1, box; 2, primary gear wheel; 3, primary pinion; 4, spray system; 5, secondary gear wheel; 6, aligning bearing; 7, bearing pad; 8, outer oil retaining ring; 9, inner oil retaining ring; 10, skeleton oil seal; 11, inner sleeve; 12, storage oil pool; 13, box cover; 14, anti-jump bearing; 15, main shaft; 16, first oil injection pipe; 17, second oil injection pipe; 18, third oil injection pipe; 19, fourth oil injection pipe; 20, conveying pipe; 21, lubricating pump. DETAILED DESCRIPTION

[0023] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application and uses. It should be understood that throughout the drawings, the same or similar reference numerals can be used to depict the same or similar components as found in each figure. The various drawings merely depict example embodiments of the present disclosure and are therefore not to be considered limiting of its scope. Specifics shown in the drawings are for purposes of illustration only and are not to be considered limiting in any way. Certain parts of the drawings can be exaggerated to illustrate aspects of the present disclosure.

[0024] Please refer to Figures 1-5 The utility model provides a kind of embodiment:

[0025] The utility model provides a novel top drive gear box, including the box 1, the top of box 1 is equipped with the box cover 13, the inner wall of box 1 is provided with primary gear 2, spraying system 4, multiple groups of primary pinion 3 and multiple groups of secondary gear 5, and the middle end of box 1 is provided with main shaft 15, spraying system 4 includes first oil injection pipe 16, second oil injection pipe 17, third oil injection pipe 18 and fourth oil injection pipe 19, and first oil injection pipe 16, second oil injection pipe 17, third oil injection pipe 18 and fourth oil injection pipe 19 are arranged between multiple groups of primary pinion 3 and multiple groups of secondary gear 5, the bottom of box 1 is provided with storage oil pool 12, and the outer surface of storage oil pool 12 is connected with two groups of lubricating pump 21, one end of two groups of lubricating pump 21 is connected with delivery pipe 20, and delivery pipe 20 is installed on the other side bottom of box 1, and delivery pipe 20 is connected with first oil injection pipe 16, second oil injection pipe 17, third oil injection pipe 18 and fourth oil injection pipe 19.

[0026] Further, the bottom of main shaft 15 is provided with bearing pad 7, outer oil retaining ring 8, inner oil retaining ring 9 and skeleton oil seal 10, bearing pad 7 provides solid support for main shaft 15, reduces the vibration and shaking of main shaft during operation, outer oil retaining ring 8 and inner oil retaining ring 9 jointly constitute an effective oil retaining system, which can prevent lubricating oil from leaking out from the gap between main shaft and box, and skeleton oil seal 10 as a key sealing element can prevent external impurities from entering the box and internal lubricating oil from leaking.

[0027] Further, the inner wall of the bottom of box 1 is provided with inner sleeve 11, which provides an additional protective layer, reduces direct contact between the bottom of the box and lubricating oil and impurities, reduces the risk of wear and corrosion, and prolongs the service life of the box.

[0028] Further, the inner wall of the middle end of box 1 is provided with a self-aligning bearing 6, and the inner sleeve 11 provides an additional protective layer, reducing direct contact between the bottom of the box and lubricating oil and impurities, reducing the risk of wear and corrosion, and prolonging the service life of the box.

[0029] Further, the inner wall of the top of box 1 is provided with a jump stop bearing 14, and the inner sleeve 11 provides an additional protective layer, reducing direct contact between the bottom of the box and lubricating oil and impurities, reducing the risk of wear and corrosion, and prolonging the service life of the box.

[0030] Further, the box cover 13 is connected with the box 1 by a plurality of bolts, and the bolt connection ensures the close fit between the box cover 13 and the box 1, preventing lubricating oil leakage and external impurities from entering. At the same time, the use of multiple bolts also improves the reliability and durability of the connection, facilitating maintenance and replacement.

[0031] Working principle: First, the storage oil pool 12 is ingeniously designed in the obliquely lower position of the box body 1. This design not only optimizes the balance of the reduction gearbox and avoids the problem of additional counterweight required by the top drive, but also makes the box body 1 as a whole present a shape similar to an inverted oil can. Such a design greatly facilitates the effective spraying and lubrication of the gear by the spraying system 4. At the same time, since part of the gear 1 / 3 is immersed in lubricating oil, this design reduces the possibility of seal failure of the sealing device under complex working conditions, thereby effectively reducing the risk of oil leakage.

[0032] During the lubrication process, the lubrication pump 21, as the core component of the spraying system, plays a crucial role. It is responsible for drawing lubricating oil from the storage oil pool 12 and delivering the oil to the first oil spraying pipe 16, the second oil spraying pipe 17, the third oil spraying pipe 18 and the fourth oil spraying pipe 19 through the delivery pipe 20. The four groups of oil spraying pipes are evenly distributed between the multiple groups of primary pinions 3 and the multiple groups of secondary gearwheels 5, ensuring that the lubricating oil can be accurately sprayed onto the meshing parts of each gear, achieving comprehensive and effective lubrication.

[0033] During the spraying and lubrication process, while the gears are fully lubricated, part of the returned lubricating oil will flow back into the storage oil pool 12 through the small holes with filter screens at the bottom of the box body 1. This realizes the recycling of lubricating oil.

[0034] In addition, the gear part of the reduction gearbox is immersed in lubricating oil, combined with the continuous spraying and lubrication of the spraying system, this double lubrication method further reduces the risk of oil leakage caused by seal failure due to complex working conditions. At the same time, this design effectively prevents the problem of dry grinding of gears caused by oil leakage or failure of the single lubrication system, thereby ensuring the long-term stable operation of the reduction gearbox.

[0035] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A novel top drive gearbox comprising a housing (1) characterised in that: The top end of the box body (1) is provided with a box cover (13), the inner wall of the box body (1) is provided with a primary gear (2), a spraying system (4), a plurality of groups of primary pinions (3) and a plurality of groups of secondary gears (5), and the middle end of the box body (1) is provided with a main shaft (15), the spraying system (4) comprises a first oil injection pipe (16), a second oil injection pipe (17), a third oil injection pipe (18) and a fourth oil injection pipe (19), and the first oil injection pipe (16), the second oil injection pipe (17), the third oil injection pipe (18) and the fourth oil injection pipe (19) are arranged between the plurality of groups of primary pinions (3) and the plurality of groups of secondary gears (5), the bottom end of the box body (1) is provided with a storage oil pool (12), and the outer surface of the storage oil pool (12) is connected with two groups of lubricating pumps (21), one end of the two groups of lubricating pumps (21) is connected with a conveying pipe (20), and the conveying pipe (20) is arranged at the other side bottom end of the box body (1), and the conveying pipe (20) is connected with the first oil injection pipe (16), the second oil injection pipe (17), the third oil injection pipe (18) and the fourth oil injection pipe (19).

2. A novel top drive gearbox as claimed in claim 1, characterized in that: The bottom end of the main shaft (15) is provided with a bearing pad (7), an outer oil retaining ring (8), an inner oil retaining ring (9) and a skeleton oil seal (10).

3. A novel top drive gearbox as claimed in claim 1, wherein: The bottom end inner wall of the box body (1) is provided with an inner sleeve (11).

4. A novel top drive gearbox as claimed in claim 1, characterized in that: The middle end inner wall of the box body (1) is provided with a self-aligning bearing (6).

5. A novel top drive gearbox as claimed in claim 1, characterized in that: The top end inner wall of the box body (1) is provided with an anti-jump bearing (14).

6. A new top drive gearbox as claimed in claim 1, characterized in that: The box cover (13) is connected with the box body (1) through a plurality of groups of bolts.

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