A tower type pumping unit speed reduction drum sealing structure

Abstract

The utility model discloses a tower type oil pumping unit reduction gear cylinder sealing structure, including the cylinder shell, the rear self -aligning roller bearing is installed to one side of cylinder shell, the recess inside is installed with the framework oil seal. The utility model discloses a framework oil seal is arranged in the recess inside, and two framework oil seals are used for sealing between spare left support end cover and spare oil seal bushing, and in order to prevent the deformation of cylinder from leading to the poor sealing effect of oil seal when heavy load, can use the axle rotation gley circle, the use of axle rotation gley circle can not only avoid the oil seal failure oil leakage, but also can prevent the external dust from entering the cavity, and in order to facilitate the disassembly of framework oil seal, can adopt the oil seal pad plate, and three inner hexagonal flat end lock screw sealing glue is screwed when working, and the oil seal pad plate and two oil seals can be jacked out with screw when disassembling oil seal, so as to achieve the purpose that the tower type oil pumping unit reduction gear cylinder can strengthen the sealing property.

Description

Technical Field

[0001] This utility model relates to the field of oil machine processing technology, and in particular to a sealing structure for a deceleration drum of a tower-type oil pumping unit. Background Technology

[0002] The pumping unit is the most important lifting device in a rod-type pumping system. Based on whether it has a walking beam, it can be divided into walking beam pumping units and beamless pumping units. After being promoted and used in heavy oil and cluster wells in more than a dozen oilfields in China, it has shown initial success in low-stroke and heavy oil pumping. In addition, truss-structure pulley block extended-stroke pumping units and roller-type long-stroke pumping units have undergone industrial trials in some oilfields, and new progress has been made in the development of gear-extended-stroke long-stroke pumping units. Lightweight, low-cost, and easy-to-adjust speed and stroke hydraulic pumping units have also accumulated certain experience after several years of research and industrial trial production. Based on experience, other novel types of pumping units, such as CNC pumping units, continuous sucker rod pumping units, truck-mounted pumping units, friction pumping units, six-link walking beam pumping units, and inclined and vertical well pumping units, are also undergoing continuous modification and trial production. However, the disadvantage of walking beam pumping units is that they are not easy to achieve the requirements of long stroke and low stroke rate, and therefore cannot meet the needs of oil production operations in heavy oil wells, deep pumping wells, and gas wells. At the same time, the performance of long stroke and low stroke beamless pumping units still needs to be improved, and the variety and specifications are still very limited, which cannot adapt to the current development of the petroleum industry. Hydraulic pumping units are still in the research and development stage.

[0003] The current tower-type pumping unit's reduction drum sealing structure can basically meet people's usage needs, but there are still some problems, specifically as follows: poor sealing performance leading to oil leakage, inability to adapt to repeated forward and reverse rotation resulting in short lifespan, inability to adapt to low-temperature environments causing drum jamming, excessive grease consumption, and poor bearing lubrication. Utility Model Content

[0004] The purpose of this invention is to provide a sealing structure for the deceleration drum of a tower-type pumping unit, in order to solve the defect of poor sealing performance of the existing deceleration drum of the tower-type pumping unit.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tower-type pumping unit deceleration drum sealing structure, including a drum shell; A rear self-aligning roller bearing is installed on one side of the roller housing, a right bearing support seat is installed on one side of the roller housing, a left support shaft is installed on one side of the roller housing, and a left support seat is installed on the outer side of the left support shaft. A shaft body is installed on one side of the left support shaft, a mounting screw is installed on one side of the left support shaft, a front self-aligning roller bearing is installed on one side inside the drum housing, and an end cover structure is installed on one side of the drum housing. A sealing structure is installed on one side of the drum shell. The sealing structure includes a groove installed inside the end cover structure, and a skeleton oil seal is installed inside the groove.

[0006] When in use, the sealing structure ensures a perfect seal and prevents oil leakage even when the roller is deformed under low speed and heavy load. If the skeleton oil seal is worn, the oil seal gasket and oil seal can be pushed out with the hexagonal flat-end set screw, making it easy to disassemble and replace the oil seal.

[0007] Furthermore, the top and bottom of the roller shell are equipped with disassembly and assembly structures. The disassembly and assembly structures include base plates disposed at the top and bottom of the roller shell, a side plate disposed on one side of the base plate, and a positioning screw passing through one side of the side plate. The disassembly and assembly structures can disassemble and assemble the roller shell.

[0008] Furthermore, a slot is provided on one side of the base plate, and a block is provided on one side of the side plate. The base plate and the side plate form a locking structure, which facilitates disassembly.

[0009] Furthermore, the outer side wall of the positioning screw is uniformly provided with external threads, and the inner side wall of the side plate is uniformly provided with internal threads that cooperate with the external threads. The positioning screw is threadedly connected to the side plate, and the positioning screw can fix the side plate and the bottom plate.

[0010] Furthermore, the end cap structure includes a left support end cap installed on one side of the drum housing, with a fixing screw passing through one side of the left support end cap and a first O-ring provided on one side of the left support end cap, and the left support end cap can be installed on one side of the drum housing.

[0011] Furthermore, an oil seal gasket is installed on one side of the skeleton oil seal, and an internal hexagonal set screw is installed on one side of the oil seal gasket. A rotating Glycol ring for the shaft is installed at the bottom end of the internal hexagonal set screw, and an oil seal bushing is installed at the bottom end of the skeleton oil seal. A second O-ring is provided inside the bottom end of the oil seal bushing to enhance the sealing performance of the device.

[0012] Furthermore, the hexagonal set screws are arranged in a ring and at equal intervals, allowing the oil seal to be installed.

[0013] The tower-type pumping unit deceleration drum sealing structure provided by this utility model has the following advantages: during use, the sealing performance of the drum can be enhanced through the sealing structure, and perfect sealing and no oil leakage can be achieved even when the drum may deform under low speed and heavy load. Once the skeleton oil seal is worn, the oil seal gasket and oil seal can be pushed out with the internal hexagonal flat end set screw, which facilitates the disassembly and replacement of the oil seal.

[0014] By installing a skeleton oil seal inside the groove, a first O-ring is used for end face sealing between the drum shell and the left support end cover, and a second O-ring is used for radial sealing between the left support shaft and the oil seal bushing. Two skeleton oil seals are used for sealing between the left support end cover and the oil seal bushing. In order to prevent the drum from deforming under heavy load, which would lead to poor oil seal sealing, a shaft rotating Glyd ring can be used. The use of the shaft rotating Glyd ring can not only avoid oil leakage due to oil seal failure, but also prevent external dust from entering the cavity. In order to facilitate the disassembly of the skeleton oil seal, an oil seal gasket can be used. Three small threaded holes are drilled on the left support end cover. During operation, three Allen head flat end set screws are tightened with sealant. When disassembling the oil seal, the oil seal gasket and the two oil seals can be pushed out with screws. This achieves the purpose of enhancing the sealing of the tower-type pumping unit's reduction drum. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a partial frontal cross-sectional view of the present invention. Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of point A in the middle section; Figure 4 This is a partial front sectional view of the disassembly and assembly structure of this utility model; Figure 5 This is a partial frontal cross-sectional view of the end cap structure of this utility model.

[0016] The reference numerals in the diagram are as follows: 1. Drum outer shell; 2. End cover structure; 201. Left support end cover; 202. Fixing screw; 203. First O-ring; 3. Left support shaft; 4. Shaft body; 5. Mounting screw; 6. Left support seat; 7. Sealing structure; 701. Skeleton oil seal; 702. Oil seal gasket; 703. Hex socket head cap set screw; 704. Oil seal bushing; 705. Second O-ring; 706. Groove; 707. Rotary Glyd ring for shaft; 8. Disassembly and assembly structure; 801. Side plate; 802. Base plate; 803. Positioning screw; 9. Front self-aligning roller bearing; 10. Rear self-aligning roller bearing; 11. Right support seat for bearing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5 One embodiment of this utility model is a tower-type pumping unit deceleration drum sealing structure, which includes a drum shell 1.

[0019] A rear self-aligning roller bearing 10 is installed on one side of the drum housing 1. A disassembly structure 8 is installed at both the top and bottom of the drum housing 1. The disassembly structure 8 includes a base plate 802 set at the top and bottom of the drum housing 1. A slot is provided on one side of the base plate 802 and a block is provided on one side of the side plate 801. The base plate 802 and the side plate 801 form a locking structure.

[0020] A side plate 801 is provided on one side of the base plate 802. A positioning screw 803 passes through one side of the side plate 801. External threads are evenly provided on the outer side wall of the positioning screw 803. Internal threads that cooperate with the external threads are evenly provided on the inner side wall of the side plate 801. The positioning screw 803 and the side plate 801 are connected by threads.

[0021] See attached document Figure 1 and attached Figure 4 As shown, the drum shell 1 is composed of a side plate 801 and a bottom plate 802. The side plate 801 and the bottom plate 802 can be combined to form a complete drum shell 1. The positioning screw 803 can be screwed into the side plate 801 and the bottom plate 802. The side plate 801 and the bottom plate 802 can be fixed by the positioning screw 803. When disassembly is required, the positioning screw 803 can be unscrewed to disassemble the shell.

[0022] A right bearing support seat 11 is installed on one side of the drum housing 1, a left support shaft 3 is installed on one side of the drum housing 1, and a left support seat 6 is installed on the outside of the left support shaft 3.

[0023] A shaft body 4 is installed on one side of the left support shaft 3, and a mounting screw 5 is installed on one side of the left support shaft 3. A front self-aligning roller bearing 9 is installed on one side inside the drum housing 1. An end cover structure 2 is installed on one side of the drum housing 1. The end cover structure 2 includes a left support end cover 201 installed on one side of the drum housing 1. A fixing screw 202 passes through one side of the left support end cover 201. A first O-ring 203 is provided on one side of the left support end cover 201.

[0024] See attached document Figure 1-3 and attached Figure 5 As shown, the left support end cover 201 is installed on one side of the drum housing 1. The fixing screw 202 and the left support end cover 201 form a threaded connection. The fixing screw 202 can be tightened to fix the left support end cover 201 on the drum housing 1. The left support end cover 201 can be removed by unscrewing the fixing screw 202. The disassembly and assembly are convenient. The left support shaft 3 and the oil seal bushing 704 are radially sealed by the second O-ring 705.

[0025] A sealing structure 7 is installed on one side of the drum shell 1. The sealing structure 7 includes a groove 706 installed inside the end cover structure 2. A skeleton oil seal 701 is installed inside the groove 706. An oil seal gasket 702 is installed on one side of the skeleton oil seal 701. An internal hexagonal flat-end set screw 703 is installed on one side of the oil seal gasket 702. The internal hexagonal flat-end set screws 703 are distributed in a ring and are arranged at equal intervals.

[0026] The bottom end of the socket head cap set screw 703 is fitted with a rotating glyph 707 for shaft use, the bottom end of the skeleton oil seal 701 is fitted with an oil seal bushing 704, and the bottom end of the oil seal bushing 704 is provided with a second O-ring 705.

[0027] See attached document Figure 1-3 As shown, a first O-ring 203 is used for end face sealing between the drum shell 1 and the left support end cover 201, and a second O-ring 705 is used for radial sealing between the left support shaft 3 and the oil seal bushing 704. Two skeleton oil seals 701 are used for sealing between the left support end cover 201 and the oil seal bushing 704. In order to prevent the drum from deforming under heavy load and causing poor oil seal sealing effect, a shaft rotating Glyd ring 707 can be used. The use of the shaft rotating Glyd ring 707 can not only avoid oil seal failure and leakage, but also prevent external dust from entering the cavity. In order to facilitate the disassembly of the skeleton oil seal 701, an oil seal gasket can be used. Three small threaded holes are drilled on the left support end cover 201. During operation, three internal hexagon flat end set screws 703 are tightened with sealant. When disassembling the oil seal, the oil seal gasket and the two oil seals can be pushed out with screws.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tower-type pumping unit deceleration drum sealing structure, comprising a drum shell (1); Its features are: A rear self-aligning roller bearing (10) is installed on one side of the roller housing (1), a right bearing support seat (11) is installed on one side of the roller housing (1), a left support shaft (3) is installed on one side of the roller housing (1), and a left support seat (6) is installed on the outside of the left support shaft (3). A shaft body (4) is installed on one side of the left support shaft (3), a mounting screw (5) is installed on one side of the left support shaft (3), a front self-aligning roller bearing (9) is installed on one side inside the roller shell (1), and an end cover structure (2) is installed on one side of the roller shell (1). A sealing structure (7) is installed on one side of the roller shell (1). The sealing structure (7) includes a groove (706) installed inside the end cap structure (2). A skeleton oil seal (701) is installed inside the groove (706).

2. The tower-type pumping unit reduction drum sealing structure according to claim 1, characterized in that: The top and bottom of the roller shell (1) are equipped with a disassembly structure (8). The disassembly structure (8) includes a base plate (802) set at the top and bottom of the roller shell (1). A side plate (801) is provided on one side of the base plate (802). A positioning screw (803) passes through one side of the side plate (801).

3. The tower-type pumping unit reduction drum sealing structure according to claim 2, characterized in that: A slot is provided on one side of the base plate (802), and a block is provided on one side of the side plate (801). The base plate (802) and the side plate (801) form a locking structure.

4. The tower-type pumping unit reduction drum sealing structure according to claim 2, characterized in that: The positioning screw (803) has external threads evenly distributed on its outer side wall, and the side plate (801) has internal threads evenly distributed on its inner side wall that cooperate with the external threads. The positioning screw (803) and the side plate (801) are connected by threads.

5. The tower-type pumping unit reduction drum sealing structure according to claim 1, characterized in that: The end cap structure (2) includes a left support end cap (201) installed on one side of the drum housing (1), a fixing screw (202) passing through one side of the left support end cap (201), and a first O-ring (203) provided on one side of the left support end cap (201).

6. The tower-type pumping unit reduction drum sealing structure according to claim 1, characterized in that: An oil seal gasket (702) is installed on one side of the skeleton oil seal (701), and an internal hexagonal flat-end set screw (703) is installed on one side of the oil seal gasket (702). A shaft rotating glyph (707) is installed at the bottom end of the internal hexagonal flat-end set screw (703). An oil seal bushing (704) is installed at the bottom end of the skeleton oil seal (701), and a second O-ring (705) is provided inside the bottom end of the oil seal bushing (704).

7. The tower-type pumping unit reduction drum sealing structure according to claim 6, characterized in that: The internal hexagonal flat-end set screws (703) are arranged in a ring, and the internal hexagonal flat-end set screws (703) are arranged at equal intervals.

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