Novel two-stage speed reducer for beam-pumping unit
By designing the input shaft, intermediate shaft and output shaft with L-shaped folding line arrangement in the sway beam oil pump, and setting up a cross-symmetric structure at the bearings of the output shaft, the problem of large space of the reducer and lubricant leakage is solved, and space saving and effective use of lubricant oil are achieved.
Patent Information
- Application Number
- CN202422128655.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-31
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-31
AI Technical Summary
The reducer in the gaze beam oil pump is arranged horizontally, which takes up a large space and the joint surface bears the maximum torque, which is prone to large lubricant leakage.
A new secondary reducer for a swimming beam oil pump was designed. By arranging the input shaft, the intermediate shaft and the output shaft in an L-shaped fold line, the height of the box is reduced, and a cross-symmetric structure is set up at the bearing of the output shaft, which avoids the bonding surface and reduces the leakage of lubricating oil.
The space saving of the reducer and the effective use of lubricant oil is achieved, the leakage of lubricant oil is reduced, and the overall performance of the reducer is improved.
Smart Images
Figure CN222880299U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reducers, in particular to a novel two-stage reducer for a beam pumping unit. Background Art
[0002] During oilfield exploitation, a pump is needed to pump the crude oil in the well to the ground. Currently, more than 90% of the pumps in my country are beam pumps. The reducer in the beam pump is limited by its own internal structure and has the following problems: the input shaft, output shaft and intermediate shaft of the reducer are arranged horizontally, which makes the reducer occupy a large space; the input shaft, output shaft and intermediate shaft are all rotatably installed on the joint surface of the reducer case and the case cover. The joint surface bears the maximum torque and is prone to large leakage of lubricating oil, which requires frequent addition of lubricating oil.
[0003] Based on this, it is necessary to invent a new type of two-stage reducer for a beam pumping unit to solve the above-mentioned problems existing in the reducer in the beam pumping unit. Utility Model Content
[0004] In order to solve the problems that the reducer currently used in the beam pumping unit has a large space occupied by the reducer, the joint surface bears the maximum torque, and a large amount of lubricating oil leakage is prone to occur due to the horizontal arrangement of the input shaft, the output shaft and the intermediate shaft in the structure, the utility model provides a new type of two-stage reducer for the beam pumping unit.
[0005] The utility model is realized by adopting the following technical solutions:
[0006] A new type of two-stage reducer for a beam pumping unit comprises a box body and a box cover fixedly mounted on the top of the box body; an intermediate shaft and an input shaft are rotatably mounted between the box body and the box cover, and an output shaft is rotatably mounted on the box body;
[0007] An intermediate herringbone gear shaft is coaxially fixedly mounted on the intermediate shaft; an input herringbone gear shaft is coaxially fixedly mounted on the input shaft; the axis of the intermediate herringbone gear shaft is arranged left-right with the axis of the input herringbone gear shaft, and the axis of the intermediate herringbone gear shaft is arranged up-down with the axis of the output shaft;
[0008] An intermediate left-hand gear and an intermediate right-hand gear are fixedly mounted on the intermediate shaft; both the intermediate left-hand gear and the intermediate right-hand gear are meshed with the input herringbone gear shaft; a low-speed herringbone gear is fixedly mounted on the output shaft, and the low-speed herringbone gear is meshed with the intermediate herringbone gear shaft.
[0009] Furthermore, the intermediate shaft and the input shaft are both rotatably supported between the housing and the housing cover through bearing A; the output shaft is rotatably supported on the housing through bearing B.
[0010] Furthermore, the intermediate left-handed gear, the intermediate right-handed gear, and the low-speed herringbone gear are all herringbone double circular arc gears.
[0011] Furthermore, a low-speed oil pool and two intermediate oil pools are fixedly provided inside the housing; the lower part of the low-speed herringbone gear is immersed in the low-speed oil pool; the lower part of the intermediate left-handed gear and the lower part of the intermediate right-handed gear are immersed in the two intermediate oil pools respectively.
[0012] Furthermore, a group of oil scrapers are arranged inside the box body; one end of each oil scraper is fixedly connected to the inner wall of the box body, and the other end of each oil scraper is abutted against the surface of the low-speed herringbone gear.
[0013] Furthermore, a viewing hole is provided on the box body, and a transparent viewing hole cover is installed on the viewing hole.
[0014] The structural design of the utility model is reasonable and reliable. Compared with the reducer currently used in the walking beam oil pumping unit, the utility model has the following beneficial effects: the input shaft, the intermediate shaft and the output shaft are arranged in an L-shaped broken line, the axial center height of the output shaft remains unchanged, and the axial centers of the input shaft and the intermediate shaft are elevated; the housing is in a cross-symmetrical structure with respect to the bearing B of the output shaft, and the front, rear, left, and right forces of the housing are the same when the reducer is running, and the forward and reverse forces are the same; the housing under this design occupies a small space; the housing does not need to be divided at the bearing B of the output shaft, that is, there is no joint surface at the low-speed output shaft, so that the housing is a high-strength integrated housing when the force is maximum at low speed, and there is no lubricating oil leakage. The intermediate shaft and the input shaft are divided at the bearing A, that is, there are joint surfaces between the housing and the housing cover at the intermediate shaft and the input shaft. Since the force on this joint surface is small, the amount of lubricating oil leakage is small, thereby reducing the overall amount of lubricating oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] Figure 2 is along Figure 1 Section view along line AA.
[0017] Figure 3 It is a structural schematic diagram of the oil scraper in the utility model.
[0018] In the figure: 1-box body, 2-box cover, 3-intermediate shaft, 31-intermediate herringbone gear shaft, 32-intermediate left-handed gear, 33-intermediate right-handed gear, 4-input shaft, 41-input herringbone gear shaft, 5-output shaft, 51-low-speed herringbone gear, 6-bearing A, 7-bearing B, 8-low-speed oil pool, 9-intermediate oil pool, 10-oil scraper. DETAILED DESCRIPTION
[0019] A new type of two-stage reducer for a beam pumping unit, comprising a housing 1 and a housing cover 2 fixedly mounted on the top of the housing 1; an intermediate shaft 3 and an input shaft 4 are rotatably mounted between the housing 1 and the housing cover 2, and an output shaft 5 is rotatably mounted on the housing 1;
[0020] An intermediate herringbone gear shaft 31 is coaxially fixedly mounted on the intermediate shaft 3; an input herringbone gear shaft 41 is coaxially fixedly mounted on the input shaft 4; the axis of the intermediate herringbone gear shaft 31 and the axis of the input herringbone gear shaft 41 are arranged left and right, and the axis of the intermediate herringbone gear shaft 31 and the axis of the output shaft 5 are arranged up and down;
[0021] An intermediate left-handed gear 32 and an intermediate right-handed gear 33 are fixedly mounted on the intermediate shaft 3; both the intermediate left-handed gear 32 and the intermediate right-handed gear 33 are meshed with the input herringbone gear shaft 41; a low-speed herringbone gear 51 is fixedly mounted on the output shaft 5, and the low-speed herringbone gear 51 is meshed with the intermediate herringbone gear shaft 31.
[0022] The intermediate shaft 3 and the input shaft 4 are both rotatably supported between the housing 1 and the housing cover 2 via the bearing A6; the output shaft 5 is rotatably supported on the housing 1 via the bearing B7.
[0023] The intermediate left-handed gear 32 , the intermediate right-handed gear 33 , and the low-speed herringbone gear 51 are all herringbone double circular arc gears.
[0024] A low-speed oil pool 8 and two intermediate oil pools 9 are fixedly arranged inside the housing 1; the lower part of the low-speed herringbone gear 51 is immersed in the low-speed oil pool 8; the lower part of the intermediate left-handed gear 32 and the lower part of the intermediate right-handed gear 33 are immersed in the two intermediate oil pools 9 respectively. By setting up independent lubricating oil pools, the lubrication of each level of bearings is more guaranteed; the low-speed oil pool 8 supplies oil to the low-speed gear meshing and the bearing B7, and there is no joint surface at the bearing B7, so there will be no lubricating oil leakage; the intermediate oil pool 9 supplies oil to the intermediate gear meshing and the bearing A6; the joint surface at the bearing A6 is less stressed, and it is not easy to leak lubricating oil.
[0025] A group of scrapers 10 are arranged inside the housing 1; one end of each scraper 10 is fixedly connected to the inner wall of the housing 1, and the other end of each scraper 10 is disposed against the surface of the low-speed herringbone gear 51. The scrapers 10 are designed in the tangential direction of the circumference of the low-speed herringbone gear 51. The two scrapers 10 ensure stable scraping of oil in both positive and negative directions. When the low-speed herringbone gear 51 is running, the scrapers 10 continuously scrape oil, and the scraped lubricating oil splashes into the two intermediate oil pools 9.
[0026] The intermediate left-handed gear 32 and the intermediate right-handed gear 33 will splash lubricating oil when they are running, and the splashing lubricating oil will continuously supply oil to the input herringbone gear shaft 41 and the bearing A6; the lubricating oil in the intermediate oil pool 9 will automatically flow back to the low-speed oil pool 8 after it is full.
[0027] The box body 1 is provided with a viewing hole, and a transparent viewing hole cover is mounted on the viewing hole. The viewing hole cover can observe the situation inside the reducer.
[0028] The specific working process of the novel two-stage reducer is as follows: the input shaft 4 is connected to an external power device, such as a pulley; an input herringbone gear shaft 41 is coaxially fixedly installed on the input shaft 4, and the input herringbone gear shaft 41 rotates under the action of the input shaft 4, and the input herringbone gear shaft 41 drives the intermediate left-handed gear 32 and the intermediate right-handed gear 33 to rotate, and the intermediate left-handed gear 32 and the intermediate right-handed gear 33 are fixedly installed on the intermediate shaft 3, and the intermediate herringbone gear shaft 31 is coaxially fixedly installed on the intermediate shaft 3, so that the intermediate herringbone gear shaft 31 rotates and drives the low-speed herringbone gear 51 to rotate, and the low-speed herringbone gear 51 is fixedly installed on the output shaft 5, so that the power is transmitted to the output shaft 5; the power transmission of this embodiment is transmitted from the input shaft 4 to the output shaft 5 through the diversion; the intermediate left-handed gear 32, the intermediate right-handed gear 33 The wheel 33 and the low-speed herringbone gear 51 are both herringbone double circular arc gears, and the axial force is always balanced; one power transmission route is from the input shaft 4 to the input herringbone gear shaft 41, and then transmitted to the intermediate right-hand gear 33 through the right shaft gear of the input herringbone gear shaft 41, and then to the intermediate herringbone gear shaft 31, and then transmitted to the low-speed herringbone gear 51 through the right shaft gear of the intermediate herringbone gear shaft 31, and the output shaft 5 outputs the power; another power transmission route is from the input shaft 4 to the input herringbone gear shaft 41, and then transmitted to the intermediate left-hand gear 32 through the left shaft gear of the input herringbone gear shaft 41, and then to the intermediate herringbone gear shaft 31, and then transmitted to the low-speed herringbone gear 51 through the left shaft gear of the intermediate herringbone gear shaft 31, and the output shaft 5 outputs the power; finally, the output shaft 5 outputs the combined power.
[0029] Since the lower part of the low-speed herringbone gear 51 is immersed in the interior of the low-speed oil pool 8; the lower part of the intermediate left-handed gear 32 and the lower part of the intermediate right-handed gear 33 are respectively immersed in the interiors of the two intermediate oil pools 9; when the reducer starts to operate, the lubricating oil will penetrate into the various components inside the reducer along with the meshing relationship of the various components and the splashing of the lubricating oil.
[0030] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying 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 cannot be understood as a limitation on the present invention.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A new type of two-stage reducer for a beam pumping unit, characterized in that: It comprises a box body (1) and a box cover (2) fixedly mounted on the top of the box body (1); an intermediate shaft (3) and an input shaft (4) are rotatably mounted between the box body (1) and the box cover (2); an output shaft (5) is rotatably mounted on the box body (1); An intermediate herringbone gear shaft (31) is coaxially fixedly mounted on the intermediate shaft (3); an input herringbone gear shaft (41) is coaxially fixedly mounted on the input shaft (4); the axis of the intermediate herringbone gear shaft (31) and the axis of the input herringbone gear shaft (41) are arranged left to right, and the axis of the intermediate herringbone gear shaft (31) and the axis of the output shaft (5) are arranged up and down; An intermediate left-handed gear (32) and an intermediate right-handed gear (33) are fixedly mounted on the intermediate shaft (3); the intermediate left-handed gear (32) and the intermediate right-handed gear (33) are both meshed with the input herringbone gear shaft (41); a low-speed herringbone gear (51) is fixedly mounted on the output shaft (5), and the low-speed herringbone gear (51) is meshed with the intermediate herringbone gear shaft (31).
2. The novel two-stage reducer for a beam pumping unit according to claim 1 is characterized in that: The intermediate shaft (3) and the input shaft (4) are both rotatably supported between the housing (1) and the housing cover (2) via bearings A (6); the output shaft (5) is rotatably supported on the housing (1) via bearings B (7).
3. The novel two-stage reducer for a beam pumping unit according to claim 1 is characterized in that: The intermediate left-handed gear (32), the intermediate right-handed gear (33), and the low-speed herringbone gear (51) are all herringbone tooth double circular arc gears.
4. The novel two-stage reducer for a beam pumping unit according to claim 1 is characterized in that: A low-speed oil pool (8) and two intermediate oil pools (9) are fixedly provided inside the housing (1); the lower portion of the low-speed herringbone gear (51) is immersed in the interior of the low-speed oil pool (8); and the lower portion of the intermediate left-handed gear (32) and the lower portion of the intermediate right-handed gear (33) are immersed in the interiors of the two intermediate oil pools (9), respectively.
5. The novel two-stage reducer for a beam pumping unit according to claim 1 is characterized in that: A group of oil scrapers (10) are arranged inside the housing (1); one end of each oil scraper (10) is fixedly connected to the inner wall of the housing (1), and the other end of each oil scraper (10) is abutted against the surface of the low-speed herringbone gear (51).
6. The novel two-stage reducer for a beam pumping unit according to claim 1 is characterized in that: A viewing hole is provided on the box body (1), and a transparent viewing hole cover is mounted on the viewing hole.