Deep-well pump oil cylinder

Abstract

The utility model provides a deep-well pump oil cylinder, and belongs to the technical field of deep-well pumps. The technical problem that bubbles are easily generated in an oil cylinder in an existing deep-well pump is solved. A deep-well pump oil cylinder comprises a cylinder body, an annular sealing section and an annular installation section which are coaxial are formed on the cylinder body, a flat plate part is connected between the inner circumference of the annular sealing section and the outer circumference of the annular installation section, and the flat plate part divides the annular sealing section and the annular installation section to form an oil storage cavity and a fixing cavity. The annular sealing section is located on the periphery of the oil storage cavity and provided with a plurality of sealing grooves arranged in the axial direction, a bearing installation hole and a sealing installation hole which are communicated with each other are formed in the annular installation section, and an oil injection hole is formed in the flat plate part. According to the oil cylinder, bubbles generated in the oil injection process of the oil cylinder can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of deep well pump technology, and specifically refers to a deep well pump cylinder. Background Technology

[0002] Deep well pumps integrate the electric motor and the pump unit, and are submerged in groundwater wells to draw and transport water. They are widely used in agricultural irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment. Because the electric motor is also submerged in water, its structural requirements are more specific than those of ordinary electric motors. The structural forms of these motors are classified as dry-type, semi-dry-type, oil-filled type, and wet-type.

[0003] Oil-filled deep well pumps use an oil-sealed motor, with the motor's internal cavity filled with insulating lubricating oil. A mechanical seal is installed at the shaft extension end, preventing external moisture and humidity from entering the motor cavity and also preventing leakage of the insulating lubricating oil. Because existing hydraulic cylinders have several fixed protrusions located within the oil injection chamber, and these protrusions are further fixed by reinforcing ribs and an inner circle, turbulence occurs when the insulating lubricating oil flows through the surfaces of these protrusions and reinforcing ribs during injection. This turbulence generates air bubbles. If these bubbles remain inside the motor and are not expelled, they will affect the overall insulation level of the motor. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a deep well pump cylinder. The technical problem this invention aims to solve is: how to reduce air bubbles generated during the oil injection process and improve the insulation of the deep well pump motor.

[0005] The objective of this utility model can be achieved through the following technical solution: A deep well pump cylinder includes a cylinder body, the cylinder body being formed with a coaxial annular sealing section and an annular mounting section, a flat plate connecting the inner circumference of the annular sealing section and the outer circumference of the annular mounting section, the flat plate separating the annular sealing section and the annular mounting section to form an oil storage cavity and a fixed cavity, the annular sealing section having a plurality of axially arranged sealing grooves on the outer circumference of the oil storage cavity, the annular mounting section having a communicating bearing mounting hole and a sealing mounting hole inside, and an oil injection hole being provided on the flat plate.

[0006] Furthermore, a cable mounting post with a smooth transition is formed between the annular sealing section and the annular mounting section. The cable mounting post has a cable mounting hole, and the lower end face of the cable mounting post is flush with the lower end face of the annular sealing section.

[0007] Furthermore, the length of the annular mounting section at one end of the oil storage cavity is greater than the length of the annular sealing section at one end of the oil storage cavity.

[0008] Furthermore, the flat plate portion is recessed away from the oil storage cavity with an oil groove, and the bearing mounting hole communicates with the oil groove.

[0009] Furthermore, the oil passage groove is square and spans the flat plate section, and the oil injection hole is located at the upper part of the oil passage groove and connects the oil storage cavity and the fixed cavity.

[0010] Furthermore, a plurality of fixing posts are formed along the inner circumference of the annular sealing section within the fixing cavity, and each fixing post has a fixing hole.

[0011] Furthermore, the annular sealing section has a notch at one end of the fixed cavity, and the notch is located above the cable mounting post.

[0012] Furthermore, the two side walls of the notch are inclined surfaces.

[0013] Compared with existing technologies, the technical advantages of this utility model are as follows: First, the flat plate section separates the annular sealing section and the annular mounting section to form an oil storage chamber and a fixing chamber. The side of the flat plate section located in the oil storage chamber is a flat plane. This flatness makes the entire machine smoother when adding insulating lubricating oil, reducing turbulence and air bubble generation, improving the insulation of the motor, and giving the deep well pump better working efficiency. Second, the length of the annular mounting section at one end of the oil storage chamber is greater than the length of the annular sealing section at one end of the oil storage chamber, making the lower end face of the cable mounting post flush with the lower end face of the annular sealing section. After the cylinder body is installed on the motor, the sealing effect of the cable mounting hole is improved. Attached Figure Description

[0014] Figure 1 This utility model is a three-dimensional Figure 1 .

[0015] Figure 2 This utility model is a three-dimensional Figure 2 .

[0016] Figure 3 This is a cross-sectional view of the present invention.

[0017] Drawing number markings: 1. Annular sealing section; 2. Annular mounting section; 3. Flat plate section; 4. Oil reservoir; 5. Fixing cavity; 6. Sealing groove; 7. Bearing mounting hole; 8. Sealing mounting hole; 9. Oil injection hole; 10. Cable mounting post; 11. Cable mounting hole; 12. Oil passage groove; 13. Fixing post; 14. Fixing hole; 15. Notch; 16. Inclined surface. Detailed Implementation

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] according to Figures 1 to 3 As shown, a deep well pump cylinder includes a cylinder body, which is integrally formed. The cylinder body has a coaxial annular sealing section 1 and an annular mounting section 2. The annular sealing section 1 is located on the outer periphery of the annular mounting section 2. A flat plate 3 connects the inner periphery of the annular sealing section 1 and the outer periphery of the annular mounting section 2. The flat plate 3 is located in the middle of the annular sealing section 1 and the annular mounting section 2, separating the annular sealing section 1 and the annular mounting section 2 to form an oil storage chamber 4 and a fixed chamber 5. The side of the flat plate 3 in the oil storage chamber 4 is a flat plane. The flat plate 3 makes the entire machine smoother when adding insulating lubricating oil, reduces turbulence, reduces the generation of air bubbles, improves the insulation of the motor, and gives the deep well pump better working efficiency. The annular sealing section 1 has several axially arranged sealing grooves 6 on the outer periphery of the oil storage chamber 4. A motor housing is fitted and fixed on the outer periphery of the annular sealing section 1. A sealing element is provided between the sealing grooves 6 and the motor housing to improve the sealing performance. Preferably, there are two sealing grooves 6. The annular mounting section 2 has interconnected bearing mounting holes 7 and sealing mounting holes 8, which are arranged in a stepped manner. An oil injection hole 9 is provided on the flat plate section 3, axially penetrating the flat plate section 3. An oil groove 12 is recessed in the flat plate section 3 away from the oil reservoir 4, and the bearing mounting hole 7 communicates with the oil groove 12. The oil groove 12 is square and spans across the flat plate section 3. The oil injection hole 9 is located above the oil groove 12 and communicates with the oil reservoir 4 and the fixing cavity 5. Several fixing posts 13 are formed along the inner circumference of the annular sealing section 1 within the fixing cavity 5. There are four fixing posts 13, evenly distributed circumferentially, and each fixing post 13 has a fixing hole 14. A notch 15 is opened at one end of the annular sealing section 1 located in the fixing cavity 5. The notch 15 is located above the cable mounting post 10 and is linearly connected to the cable mounting hole 11. The two side walls of the notch 15 are inclined surfaces 16, forming an inclined cut that is larger on the outside and smaller on the inside.

[0021] A smoothly transitioning cable mounting post 10 is formed between the annular sealing section 1 and the annular mounting section 2, and the cable mounting post 10 axially passes through the flat plate section 3. The cable mounting post 10 has a cable mounting hole 11 in the middle, and its lower end face is flush with the lower end face of the annular sealing section 1. The length of the annular mounting section 2 at one end of the oil reservoir 4 is greater than the length of the annular sealing section 1 at one end of the oil reservoir 4. This allows for better sealing of the cable mounting hole 11 after the cylinder body is mounted on the motor.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A deep well pump cylinder, comprising a cylinder body, characterized in that: The cylinder body is formed with a coaxial annular sealing section (1) and an annular mounting section (2). A flat plate (3) is connected between the inner circumference of the annular sealing section (1) and the outer circumference of the annular mounting section (2). The flat plate (3) separates the annular sealing section (1) and the annular mounting section (2) to form an oil storage cavity (4) and a fixed cavity (5). The annular sealing section (1) has several axially arranged sealing grooves (6) on the outer circumference of the oil storage cavity (4). The annular mounting section (2) has a communicating bearing mounting hole (7) and a sealing mounting hole (8) inside. An oil injection hole (9) is opened on the flat plate (3). The flat plate (3) has an oil passage groove (12) recessed away from the oil storage cavity (4). The bearing mounting hole (7) is connected to the oil passage groove (12).

2. The deep well pump cylinder according to claim 1, characterized in that: A cable mounting post (10) with a smooth transition is formed between the annular sealing section (1) and the annular mounting section (2). The cable mounting post (10) has a cable mounting hole (11), and the lower end face of the cable mounting post (10) is flush with the lower end face of the annular sealing section (1).

3. A deep well pump cylinder according to claim 2, characterized in that: The length of the annular mounting section (2) at one end of the oil storage cavity (4) is greater than the length of the annular sealing section (1) at one end of the oil storage cavity (4).

4. A deep well pump cylinder according to claim 3, characterized in that: The oil passage groove (12) is square and spans the flat plate (3). The oil injection hole (9) is located on the upper part of the oil passage groove (12) and connects the oil storage cavity (4) and the fixed cavity (5).

5. A deep well pump cylinder according to claim 1, characterized in that: The fixed cavity (5) has a plurality of fixed posts (13) formed along the inner circumference of the annular sealing section (1), and the fixed posts (13) have fixed holes (14).

6. A deep well pump cylinder according to claim 2, characterized in that: The annular sealing section (1) has a notch (15) at one end of the fixed cavity (5), and the notch (15) is located above the cable mounting post (10).

7. A deep well pump cylinder according to claim 6, characterized in that: The two side walls of the notch (15) are inclined surfaces (16).

Images