Non-contact type sealing structure for screw rod of screw press
Patent Information
- Application Number
- CN202420985663.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The sealing structure of existing spiral presses is prone to oil leakage when rotating at high speed, which affects the lubrication effect and structural stability.
A contactless sealing structure is designed. By setting a step groove and an oil storage groove between the main screw and the fuselage, the relative rotation structure of the oil sealing ring and the retaining ring is used, and combined with the tension of the liquid, the effective storage and distribution of lubricating oil is achieved, reducing relative rotational friction.
It effectively improves the lubrication quality, reduces structural wear, extends the structure life, avoids oil leakage, and improves working stability.
Smart Images
Figure CN222628741U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improvement on the lubrication structure of a screw press, in particular to a contactless sealing structure of a screw rod of a screw press. Background Art
[0002] The electric screw press realizes the movement of the striking structure by rotating the structure on the screw. The screw structure has a high rotation frequency and withstands a large working impact force. Therefore, lubricating oil needs to be filled between its structures to reduce structural wear. The lubricating oil cup is enclosed in the oil cavity and can enter the working structure along the gap of the structure to achieve the effect of lubrication. The conventional oil sealing structure is mainly connected to the screw through an oil sealing ring, and the edge of the oil sealing ring is sealed by a sealing ring to achieve a sealing effect. However, due to the fast rotation speed of the screw, working vibration is generated. After a long period of work, gaps will appear on the closed edges, resulting in oil leakage, affecting the lubrication of the structure and affecting the stability of the work. Utility Model Content
[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a contactless sealing structure for a screw rod of a screw press.
[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: the main screw of the screw press is uprightly arranged, and is rotatably connected with the machine body, an axial hole is arranged in the middle of the machine body, the main screw is connected in the axial hole, a step groove is arranged in the machine body in the axial hole, an axial connecting piece is arranged in the step groove, an oil storage tank is formed between the step groove and the axial connecting piece, an oil sealing ring is sealed at the opening of the oil storage tank, an oil storage cavity is arranged on the inner side of the oil sealing ring, the oil storage cavity corresponds to the oil storage tank and is communicated and connected, a clamping ring is sleeved on the main screw, the edge of the clamping ring forms an annular flange, the diameter of the inner edge of the oil sealing ring is smaller than the diameter of the flange and forms a rotating oil gap. The main screw and the body of the screw press rotate with each other, and the gap between the rotating structures needs to be filled with lubricating oil, so a step groove is set in the shaft hole to form an oil storage tank, and the oil sealing ring is set to a groove structure with an oil storage cavity, which increases the storage space of the oil. When rotating at high speed, the oil has a larger buffer space, which improves the lubrication quality. The oil sealing ring and the main screw are not in complete contact, and a relative loop structure is formed by the retaining ring and the flange. The tension of the liquid is used to prevent the oil from overflowing, reduce the wear caused by relative rotation friction, and extend the life of the structure.
[0005] Furthermore, the oil sealing ring is formed with an outer ring and docked with the fuselage. The outer ring and the edge of the oil storage tank are provided with a step body. A rubber ring is embedded on the docking surface of the outer ring, and the rubber ring closes the contact gap between the outer ring and the fuselage. The outer ring is the part connected to the fuselage, and has a joint surface that needs to be sealed. The joint surface is sealed by the rubber ring. The step body is used to avoid the gap at the edge of the oil storage tank to prevent the tension of the oil from directly penetrating into the gap and improve the sealing performance.
[0006] Furthermore, the oil sealing ring is formed with an oil hole, an oil nozzle is fixed on the oil hole, the oil nozzle is connected to the oil supply device through an oil pipe, and the oil supply device fills the oil storage cavity with lubricating oil. The oil in the cavity of the oil sealing ring can be replenished by the oil supply device to maintain the pressure balance of the internal oil, avoid the formation of cavities due to uneven pressure, and improve the quality of lubrication.
[0007] Furthermore, the oil seal ring is an integrally formed metal casting with uniform wall thickness and a smooth inner wall of the oil storage cavity surface. The oil seal ring is an integrally formed structure, and the overall structure can maintain the stability of the lubricating oil pressure, ensure the stability of the screw rotation state, and reduce structural wear.
[0008] Compared with the prior art, the utility model has the following advantages and effects: the design is an improvement on the screw lubrication structure of a screw press, which increases the volume of the oil space, and the relatively rotating structures are not in direct contact through the oil gap, which reduces structural wear, increases structural life, and effectively improves lubrication quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the comparative structure before and after the improvement.
[0010] Figure 2 It is a schematic diagram of the improved amplified structure.
[0011] In the figure: 1. main screw, 2. body, 3. shaft hole, 4. step groove, 5. axial connecting piece, 6. oil storage tank, 7. oil sealing ring, 8. oil storage chamber, 9. retaining ring, 10. flange, 11. oil gap, 12. outer ring, 13. step body, 14. rubber ring, 15. oil hole, 16. oil nozzle. DETAILED DESCRIPTION
[0012] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.
[0013] A contactless sealing structure for a screw press screw, wherein a main screw 1 of the screw press is arranged upright and is rotationally connected to a body 2, an axial hole 3 is arranged in the middle of the body 2, the main screw 1 is connected to the axial hole 3, a step groove 4 is arranged in the axial hole 3 of the body 2, an axial connecting piece 5 is arranged in the step groove 4, an oil storage groove 6 is formed between the step groove 4 and the axial connecting piece 5, an oil sealing ring 7 is sealed at the opening of the oil storage groove 6, an oil storage cavity 8 is arranged inside the oil sealing ring 7, the oil storage cavity 8 corresponds to the oil storage groove 6 and is in communication with the oil storage groove 6, a retaining ring 9 is sleeved on the main screw 1, and the edge of the retaining ring 9 forms an annular flange 10, the diameter of the inner edge of the oil sealing ring 7 is smaller than the diameter of the flange 10 and forms a rotating oil gap 11.
[0014] The oil sealing ring 7 is formed with an outer ring 12 and docked with the fuselage 2. A step body 13 is provided at the edge of the outer ring 12 and the oil storage tank 6. A rubber ring 14 is embedded on the docking surface of the outer ring 12 to close the contact gap between the outer ring 12 and the fuselage 2.
[0015] The oil sealing ring 7 is formed with an oil hole 15 , and an oil nozzle 16 is fixed on the oil hole 15 . The oil nozzle 16 is connected to an oil supply device through an oil pipe, and the oil supply device fills the oil storage chamber 8 with lubricating oil.
[0016] The oil sealing ring 7 is an integrally formed metal casting with a uniform wall thickness, and forms an oil storage cavity 8 surface with a smooth inner wall.
[0017] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present invention is defined by the claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.
[0018] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A contactless sealing structure for a screw press screw, characterized in that: The main screw (1) of the screw press is arranged upright and is rotatably connected to the body (2). An axial hole (3) is arranged in the middle of the body (2). The main screw (1) is connected to the axial hole (3). The body (2) is provided with a step groove (4) in the axial hole (3). An axial connecting piece (5) is arranged in the step groove (4). An oil storage groove (6) is formed between the step groove (4) and the axial connecting piece (5). An oil sealing ring (7) is provided at the opening of the oil storage groove (6). An oil storage cavity (8) is provided inside the oil sealing ring (7). The oil storage cavity (8) corresponds to and is in communication with the oil storage groove (6). A retaining ring (9) is sleeved on the main screw (1). The edge of the retaining ring (9) forms an annular flange (10). The diameter of the inner edge of the oil sealing ring (7) is smaller than the diameter of the flange (10) and forms a rotating oil gap (11).
2. The screw press screw contactless sealing structure according to claim 1, characterized in that: The oil sealing ring (7) is formed with an outer ring (12) and is butted against the fuselage (2); a step body (13) is provided at the edge of the outer ring (12) and the oil storage tank (6); a rubber ring (14) is embedded on the butt surface of the outer ring (12); the rubber ring (14) closes the contact gap between the outer ring (12) and the fuselage (2).
3. The screw press screw contactless sealing structure according to claim 1, characterized in that: The oil sealing ring (7) is formed with an oil hole (15), an oil nozzle (16) is fixed on the oil hole (15), and the oil nozzle (16) is connected to an oil supply device through an oil pipe, and the oil supply device fills lubricating oil into the oil storage chamber (8).
4. The screw press screw contactless sealing structure according to claim 1, characterized in that: The oil sealing ring (7) is an integrally formed metal casting with a uniform wall thickness, and forms an oil storage cavity (8) surface with a smooth inner wall.