Novel speed reducer for vertical chain pumping unit

Abstract

The utility model relates to the technical field of speed reducers, in particular to a novel speed reducer for a vertical chain pumping unit, which comprises a box body divided into a lower box body and an upper box body. The upper box body comprises a box cover and a box seat; an input shaft and an intermediate shaft are rotatably mounted between the box cover and the box seat, an output shaft I and an output shaft II are rotatably mounted on the lower box body, the intermediate shaft and the input shaft are distributed left and right, the intermediate shaft and the output shaft I are distributed up and down, and the output shaft I and the output shaft II are distributed left and right; an input herringbone gear shaft is coaxially and fixedly assembled on the input shaft, a middle herringbone gear shaft is fixedly assembled on the middle shaft, and a middle left-hand gear and a middle right-hand gear are fixedly installed on the middle shaft. Output herringbone gears are fixedly mounted on the output shaft I and the output shaft II; the input shaft is provided with a brake assembly. The speed reducer solves the problems that transmission from an input shaft to double output shafts of a speed reducer used by an existing vertical chain pumping unit needs seven shafts, and a brake device is in an external embracing type brake mode.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a novel speed reducer for a vertical chain pumping unit. Background Art

[0002] A vertical chain pumping unit is a pumping device used in oil fields, which provides power for the sucker rod through devices such as a motor, a pulley, a speed reducer, a sprocket and a chain. However, the speed reducer used in the current vertical chain pumping unit has the following problems due to the limitation of its internal structure:

[0003] Firstly, the axes of each shaft inside the speed reducer are horizontally arranged, so the internal structure of the speed reducer is complex. As Figure 4 shown, the transmission from the input shaft a to the first output shaft and the second output shaft requires seven shafts to achieve. As a result, there are seven pairs of tooth side clearances inside the speed reducer, reducing the transmission efficiency; at the same time, the cumulative amount of the tooth side clearances is large, and the phenomenon of tooth hitting is likely to occur during long-term operation, affecting the smoothness of the transmission; the axles of the seven shafts are horizontally arranged, the volume of the speed reducer is large, the double output shafts are rotatably installed on the split box joint surface of the box body and the box cover, the joint surface is subjected to large force, and oil leakage is likely to occur, and the consumption of lubricating oil is large;

[0004] Secondly, the braking device is an externally-mounted brake. As Figure 4 shown, the brake wheel a is installed on the input shaft a through a flat key connection, and at the same time, the pulley a is installed on the brake wheel a through a flat key connection; this installation method results in an overly long overhang of the input shaft a, and at the same time, there is a radial force during the transmission of the pulley a, making the bending moment applied to the input shaft a too large. The stress cycle during long-term operation is extremely likely to cause the input shaft a to break.

[0005] Based on this, it is necessary to invent a novel speed reducer for a vertical chain pumping unit to solve the above problems existing in the current speed reducer used in the vertical chain pumping unit. Content of the Utility Model

[0006] The utility model provides a novel speed reducer for a vertical chain pumping unit to solve the problems that the transmission from the input shaft to the double output shafts of the current speed reducer used in the vertical chain pumping unit requires seven shafts and the braking device is an externally-mounted brake.

[0007] The utility model is realized by adopting the following technical scheme:

[0008] A novel speed reducer for a vertical chain pumping unit includes a box body, and the box body is divided into two parts: a lower box body and an upper box body; the upper box body includes a box cover and a box seat; an input shaft and an intermediate shaft are rotatably installed between the box cover and the box seat, an output shaft I and an output shaft II are rotatably installed on the lower box body, and the intermediate shaft and the input shaft are distributed left and right, the intermediate shaft and the output shaft I are distributed up and down, and the output shaft I and the output shaft II are distributed left and right;

[0009] An input herringbone gear shaft is coaxially and fixedly assembled on the input shaft, an intermediate herringbone gear shaft is fixedly assembled on the intermediate shaft, and an intermediate left-handed gear and an intermediate right-handed gear are fixedly installed on the intermediate shaft; output herringbone gears are fixedly installed on both the output shaft I and the output shaft II; both the intermediate left-handed gear and the intermediate right-handed gear are meshed with the input herringbone gear shaft, and the output herringbone gear on the output shaft I is meshed with the intermediate herringbone gear shaft; the output herringbone gears on the output shaft I and the output shaft II are meshed with each other;

[0010] One end of the input shaft extending out of the box body is provided with a brake assembly; the brake assembly includes a brake wheel and brake shoes, and the brake wheel is installed on the input shaft.

[0011] Furthermore, the lower box body is of an integral structure.

[0012] Furthermore, both the output shaft I and the output shaft II are rotatably installed on the lower box body through bearing A, and both the input shaft and the intermediate shaft are rotatably installed between the box cover and the box seat through bearing B.

[0013] Furthermore, the brake assembly further includes a camshaft, a connecting rod, a safety hook and a safety seat.

[0014] Furthermore, the brake wheel is installed on the input shaft through a conical surface and a flat key; the brake wheel and the belt pulley are positioned by a spigot and connected by bolts.

[0015] The structure of the utility model is reasonably and reliably designed. Compared with the reducers used in current vertical chain pumping units, it has the following beneficial effects;

[0016] First, the new reducer can realize the transmission from the input shaft to the output shaft I and the output shaft II with only four shafts, which simplifies the internal structure, has a smaller volume, reduces the tooth side clearance to three pairs, reduces the transmission stage number, and thus improves the transmission efficiency; the cumulative amount of the tooth side clearance is reduced, effectively reducing the probability of tooth hitting; at the same time, the input shaft, the intermediate shaft, the output shaft I and the output shaft II of the new reducer are arranged in a Z-shaped broken line, there is no split box joint surface for the bearing A at the output shaft I and the output shaft II, the lower box body with large force is of a high-strength integral structure, there is no lubricating oil leakage phenomenon, and there is a split box joint surface for the bearing B at the input shaft and the intermediate shaft. Since the force on this joint surface is small, the lubricating oil leakage amount is small, so that the overall consumption of the lubricating oil is reduced;

[0017] Second, the brake assembly is designed as an internal expanding brake, and the core structure of the belt pulley itself is redesigned, so that the belt pulley is installed on the brake wheel through spigot positioning and bolts. This installation method shortens the cantilever of the input shaft extension, reduces the bending moment applied to the input shaft, and thus effectively reduces the probability of the input shaft fracture phenomenon. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the external structure of the present utility model.

[0019] Figure 2 is along Figure 1 the sectional view taken along line A-A in

[0020] Figure 3 is a schematic diagram of the structure of the brake assembly of the present utility model.

[0021] Figure 4 is a schematic diagram of the internal structure of the speed reducer used in the current vertical chain pumping unit.

[0022] In the figure: 1 - lower box body, 2 - upper box body, 201 - box cover, 202 - box seat, 3 - input shaft, 31 - input herringbone gear shaft, 4 - intermediate left-handed gear, 5 - intermediate shaft, 51 - intermediate herringbone gear shaft, 6 - output shaft I, 7 - output herringbone gear, 8 - output shaft II, 9 - bearing A, 10 - intermediate right-handed gear, 11 - bearing B, 12 - brake assembly, 121 - brake wheel, 122 - brake shoe, 13 - bolt, 14 - pulley, 15 - input shaft a, 16 - second shaft, 17 - third shaft, 18 - fourth shaft, 19 - fifth shaft, 20 - first output shaft, 21 - second output shaft, 22 - brake wheel a, 23 - pulley a. Specific embodiments

[0023] A novel speed reducer for a vertical chain pumping unit includes a box body, and the box body is divided into two parts: a lower box body 1 and an upper box body 2; the upper box body 2 includes a box cover 201 and a box seat 202; an input shaft 3 and an intermediate shaft 5 are rotatably installed between the box cover 201 and the box seat 202, an output shaft I 6 and an output shaft II 8 are rotatably installed on the lower box body 1, and the intermediate shaft 5 and the input shaft 3 are distributed left and right, the intermediate shaft 5 and the output shaft I 6 are distributed up and down, and the output shaft I 6 and the output shaft II 8 are distributed left and right;

[0024] An input herringbone gear shaft 31 is coaxially and fixedly assembled on the input shaft 3, an intermediate herringbone gear shaft 51 is fixedly assembled on the intermediate shaft 5, and an intermediate left-handed gear 4 and an intermediate right-handed gear 10 are fixedly installed on the intermediate shaft 5; output herringbone gears 7 are fixedly installed on both the output shaft I 6 and the output shaft II 8; both the intermediate left-handed gear 4 and the intermediate right-handed gear 10 are meshed with the input herringbone gear shaft 31, and the output herringbone gear 7 on the output shaft I is meshed with the intermediate herringbone gear shaft 51; the output herringbone gears 7 on the output shaft I 6 and the output shaft II 8 are meshed with each other;

[0025] One end of the input shaft 3 extending out of the box body is provided with a brake assembly 12; the brake assembly 12 includes a brake wheel 121 and a brake shoe 122, and the brake wheel 121 is installed on the input shaft 3.

[0026] The lower box body 1 is of an integral structure.

[0027] The output shaft I 6 and the output shaft II 8 are both rotatably mounted on the lower housing 1 through bearings A 9, and the input shaft 3 and the intermediate shaft 5 are both rotatably mounted between the cover 201 and the base 202 through bearings B 11.

[0028] The brake assembly 12 further includes a camshaft, a connecting rod, a safety hook and a safety seat.

[0029] The brake wheel 121 is mounted on the input shaft 3 through a conical surface and a flat key; the brake wheel 121 and the pulley 14 are connected by a spigot positioning and bolts 13.

[0030] The specific working process of the new type of reducer is as follows: The input shaft 3 is connected to the pulley 14, and the input shaft 3 transmits power to the intermediate left-handed gear 4 and the intermediate right-handed gear 10 through the input herringbone gear shaft 31. The intermediate left-handed gear 4 and the intermediate right-handed gear 10 are fixedly mounted on the intermediate shaft 5. Driven by the intermediate shaft 5, the intermediate herringbone gear shaft 51 rotates, so that the output herringbone gear 7 on the output shaft I rotates. The output herringbone gears 7 on the output shaft I 6 and the output shaft II 8 mesh with each other. Therefore, the two output herringbone gears 7 rotate together, and thus the power is transmitted to the output shaft I 6 and the output shaft II 8.

[0031] In the specific implementation process, the bearing A 9 is a spherical roller bearing, and the bearing B 11 is a cylindrical roller bearing; the intermediate left-handed gear 4 and the intermediate right-handed gear 10 are both mounted on the intermediate shaft 5 through flat keys, and the two output herringbone gears 7 are both mounted on the output shaft I 6 and the output shaft II 8 through flat keys. The reduction ratio of the present invention can be selected as i = 20 - 31.5, so that the transmission of the pulley 14 is reasonable, and the transmission ratio can be freely selected between 16 - 40; a lubricating oil sump and an oil scraper are provided inside the housing to ensure that each component is lubricated.

[0032] In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of reducer for a vertical chain pumping unit, characterized in that: The invention comprises a box body, wherein the box body is divided into two parts, namely a lower box body (1) and an upper box body (2); the upper box body (2) comprises a box cover (201) and a box seat (202); an input shaft (3) and an intermediate shaft (5) are rotatably mounted between the box cover (201) and the box seat (202); an output shaft I (6) and an output shaft II (8) are rotatably mounted on the lower box body (1); the intermediate shaft (5) and the input shaft (3) are arranged in a left-right manner, the intermediate shaft (5) and the output shaft I (6) are arranged in a top-bottom manner, and the output shaft I (6) and the output shaft II (8) are arranged in a left-right manner; An input herringbone gear shaft (31) is coaxially fixedly mounted on the input shaft (3), an intermediate herringbone gear shaft (51) is fixedly mounted on the intermediate shaft (5), and an intermediate left-handed gear (4) and an intermediate right-handed gear (10) are fixedly mounted on the intermediate shaft (5); an output herringbone gear (7) is fixedly mounted on both the output shaft I (6) and the output shaft II (8); both the intermediate left-handed gear (4) and the intermediate right-handed gear (10) are meshed with the input herringbone gear shaft (31), and the output herringbone gear (7) on the output shaft I is meshed with the intermediate herringbone gear shaft (51); the output herringbone gear (7) on the output shaft I (6) and the output herringbone gear (7) on the output shaft II (8) are meshed with each other; A brake assembly (12) is mounted on one end of the input shaft (3) extending out of the housing; the brake assembly (12) comprises a brake wheel (121) and a brake shoe (122); the brake wheel (121) is mounted on the input shaft (3).

2. According to claim 1, a novel reducer for a vertical chain pumping unit is characterized in that: The lower box body (1) is an integrated structure.

3. The novel reducer for a vertical chain pumping unit according to claim 1 is characterized in that: The output shaft I (6) and the output shaft II (8) are both rotatably mounted on the lower housing (1) via a bearing A (9), and the input shaft (3) and the intermediate shaft (5) are both rotatably mounted between the housing cover (201) and the housing seat (202) via a bearing B (11).

4. The novel reducer for a vertical chain pumping unit according to claim 1 is characterized in that: The brake assembly (12) further comprises a camshaft, a connecting rod, a safety hook and a safety seat.

5. The novel reducer for a vertical chain pumping unit according to claim 1 is characterized in that: The brake wheel (121) is mounted on the input shaft (3) via a conical surface and a flat key; the brake wheel (121) and the belt pulley (14) are positioned via a stop and connected with a bolt (13).

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