Sealing structure of pumping unit speed reducer

Abstract

The utility model discloses a kind of pumping unit speed reducer sealing structure in the technical field of speed reducer, including speed reducer shell, speed reducer output shaft, sealing plate and fixed bolt, threaded hole is set on the speed reducer shell, the threaded hole is matched with fixed bolt, mounting groove is set in the right side of the speed reducer shell, sealing ring is installed in the mounting groove, L type metal reinforcing ring is set in sealing ring, connecting rod is fixedly connected in the left side of the sealing plate, clamping block is fixedly connected in the left end of the connecting rod, mounting hole is set in the right half of the sealing ring, bayonet is set on the L type metal reinforcing ring, the installation of L type metal reinforcing ring, the overall rigidity of sealing ring is significantly improved, prevent under high pressure or complex stress condition Twist, collapse or permanent deformation, L type metal reinforcing ring can make up the problem of material elasticity decline, ensure that sealing surface continues to stick.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer sealing technology, specifically a sealing structure for an oil pumping unit speed reducer. Background Technology

[0002] The seal of the pumping unit reducer is a key component to ensure the normal operation of the equipment and prevent lubricating oil leakage and the intrusion of external contaminants. For example, the sealing structure of the pumping unit reducer sealing device disclosed in Chinese patent literature (application number: CN202322045280.5) uses springs and elastic materials, and the elastic material is made of sponge. The spring is prone to fatigue failure when it is in a compressed state for a long time. The spring rebound force will gradually weaken with the use time, affecting the sealing effect. The device needs to be completely disassembled to replace the sealing plate. Using sponge as an elastic material may not be resistant to oil and high temperature. Long-term contact with lubricating oil may cause the sponge material to degrade. Relying solely on spring pressure to maintain the seal may create gaps when rotating at high speed. It lacks auxiliary sealing structures, such as oil return holes.

[0003] Therefore, we propose a sealing structure for the oil pump reducer. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing structure for a pumping unit reducer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a pumping unit reducer, comprising a reducer housing, a reducer output shaft, a sealing plate, and fixing bolts; A threaded hole is provided on the reducer housing, and the threaded hole mates with a fixing bolt; The mounting slot is located on the right side of the reducer housing; A sealing ring is installed in the mounting groove. The L-shaped metal reinforcing ring is placed inside the sealing ring. The connecting rod is fixedly connected to the left side of the sealing plate; A locking block is fixedly connected to the left end of the connecting rod. The mounting hole is located on the right half of the sealing ring; The bayonet is located on the L-shaped metal reinforcing ring; The first oil passage is located inside the reducer housing, and a second oil passage is located at the bottom of the first oil passage.

[0006] Preferably, the first oil passage is arranged around the output shaft of the reducer.

[0007] Preferably, the length of the fixing bolt is less than the sum of the length of the threaded hole and the thickness of the sealing plate.

[0008] Preferably, the top of the card block is set as a slope.

[0009] Preferably, the sealing plate is provided with through holes that cooperate with the fixing bolts.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. The fixing bolts pass through the sealing plate and connect to the threaded holes. Tighten the fixing bolts to fix the sealing plate and quickly install and fix the sealing ring. Remove the fixing bolts, move the sealing plate, and the locking block at the left end of the connecting rod on the left side of the sealing plate pulls the L-shaped metal reinforcing ring through the bayonet. The L-shaped metal reinforcing ring drives the sealing ring to move, allowing for quick disassembly of the sealing ring. The installation of the L-shaped metal reinforcing ring significantly improves the overall rigidity of the sealing ring, preventing twisting, collapse, or permanent deformation under high pressure or complex stress conditions. The L-shaped metal reinforcing ring can compensate for the problem of decreased material elasticity, ensuring continuous contact of the sealing surface.

[0011] 2. Oil seepage occurs between the output shaft of the reducer and the reducer housing. After the leaking lubricating oil penetrates into the first oil passage, it flows through the first oil passage to the second oil passage and then back into the reducer, reducing the leakage of lubricating oil inside the reducer. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is an enlarged view of section A of this utility model; Figure 4 This is an enlarged view of section B of this utility model.

[0013] In the diagram: 1. Gearbox housing; 2. Gearbox output shaft; 3. Sealing plate; 4. Fixing bolt; 5. Threaded hole; 6. Mounting groove; 7. Sealing ring; 8. L-shaped metal reinforcing ring; 9. Connecting rod; 10. Clamping block; 11. Mounting hole; 12. Bayonet; 13. First oil passage; 14. Second oil passage. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4This utility model provides a technical solution: a sealing structure for a pumping unit reducer, including a reducer housing 1, a reducer output shaft, a sealing plate 3, and a fixing bolt 4. A threaded hole 5 is provided on the reducer housing 1, and the threaded hole 5 cooperates with the fixing bolt 4. An installation groove 6 is provided on the right side of the reducer housing 1. A sealing ring 7 is installed in the installation groove 6. An L-shaped metal reinforcing ring 8 is provided in the sealing ring 7. A connecting rod 9 is fixedly connected to the left side of the sealing plate 3. A locking block 10 is fixedly connected to the left end of the connecting rod 9. An installation hole 11 is provided on the right half of the sealing ring 7. A locking slot 12 is provided on the L-shaped metal reinforcing ring 8. To install the sealing ring 7, place it on the output shaft 2 of the reducer and insert it into the mounting groove 6. Pass the sealing plate 3 through the output shaft 2 of the reducer, aligning the through hole on the sealing plate 3 with the threaded hole 55. Connect the fixing bolt 4 through the sealing plate 3 and the threaded hole 55, and tighten the fixing bolt 4 to secure the sealing plate 3. This allows for quick installation and fixation of the sealing ring. Simultaneously, the connecting rod 9 and the locking block 10 on the left side of the sealing plate 3 pass through the mounting hole 11. At this point, the connecting rod 9 bends. When the locking block 10 moves to the locking slot 12, the connecting rod 9 returns to its original position, and the locking block 10 locks the locking slot 12. This allows for the removal of the sealing ring. Loosen and remove the fixing bolts 6, move the sealing plate 3, and the locking block 10 set at the left end of the connecting rod 9 on the left side of the sealing plate 3 pulls the L-shaped metal reinforcing ring 8 through the bayonet 12. The L-shaped metal reinforcing ring 8 drives the sealing ring 7 to move, and the sealing ring 7 can be quickly disassembled. The installation of the L-shaped metal reinforcing ring 8 significantly improves the overall rigidity of the sealing ring and prevents twisting, collapse or permanent deformation under high pressure or complex stress conditions. The sealing ring 7 is made of rubber. Rubber or polyurethane and other elastic materials are prone to aging or wear after long-term use. The L-shaped metal reinforcing ring 8 can make up for the problem of decreased material elasticity and ensure continuous contact of the sealing surface.

[0016] Reference embodiment: The first oil passage 13 is set inside the reducer housing 1, and the second oil passage 14 is set at the bottom of the first oil passage 13. The first oil passage 13 is arranged around the reducer output shaft 2. During the operation of the oil pump reducer, oil seepage occurs between the reducer output shaft 2 and the reducer housing. After the leaked lubricating oil penetrates into the first oil passage 13, the lubricating oil flows through the first oil passage 13 to the second oil passage 14, and then flows back into the reducer through the second oil passage 14, reducing the leakage of lubricating oil in the reducer.

[0017] Reference embodiment: The length of the fixing bolt 4 is less than the sum of the length of the threaded hole 5 and the thickness of the sealing plate 3. After installation, there is a gap between the left end of the fixing bolt 4 and the left end of the threaded hole 5, leaving enough space for the fixing bolt 4 to be tightened.

[0018] Reference embodiment: The top of the locking block 10 is set as an inclined surface. When the sealing plate 3 is installed, after the locking block 10 contacts the L-shaped metal reinforcing ring 8, the L-shaped metal reinforcing ring 8 pushes the locking block 10 to move. The locking block 10 moves to the position of the locking slot 12 and locks the locking slot 12, which facilitates the subsequent disassembly and replacement of the sealing ring 7.

[0019] Reference embodiment: The sealing plate 3 is provided with a through hole that mates with the fixing bolt 4. The fixing bolt 4 passes through the through hole provided on the sealing plate 3 and connects with the threaded hole 5.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a pumping unit reducer, characterized in that, Includes a reducer housing (1), a reducer output shaft (2), a sealing plate (3), and fixing bolts (4); A threaded hole (5) is provided on the reducer housing (1), and the threaded hole (5) is engaged with the fixing bolt (4); Mounting slot (6) is located on the right side of the reducer housing (1); A sealing ring (7) is installed in the mounting groove (6); L-shaped metal reinforcing ring (8), which is set inside the sealing ring (7); Connecting rod (9), the connecting rod (9) is fixedly connected to the left side of the sealing plate (3); The locking block (10) is fixedly connected to the left end of the connecting rod (9); Mounting hole (11) is provided on the right half of the sealing ring (7); A bayonet (12) is provided on the L-shaped metal reinforcing ring (8); The first oil passage (13) is located inside the reducer housing (1), and a second oil passage (14) is located at the bottom of the first oil passage (13).

2. The sealing structure of the oil pump reducer according to claim 1, characterized in that: The first oil passage (13) is arranged around the output shaft (2) of the reducer.

3. The sealing structure of the oil pump reducer according to claim 1, characterized in that: The length of the fixing bolt (4) is less than the sum of the length of the threaded hole (5) and the thickness of the sealing plate (3).

4. The sealing structure of the oil pump reducer according to claim 1, characterized in that: The top of the card block (10) is set as a slope.

5. The sealing structure of the oil pump reducer according to claim 1, characterized in that: The sealing plate (3) is provided with a through hole that cooperates with the fixing bolt (4).

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