Oil nozzle structure and bearing
By embedding an oil nozzle structure inside the bearing, the oil outlet area is increased and scratches are reduced, thus solving the problem of insufficient oil film formation in sliding bearings and improving the service life of the steam turbine.
Patent Information
- Application Number
- CN202422975586.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing high-pressure jacking oil hole structure of the turbine sliding bearing is prone to scratches during the drilling process, resulting in insufficient oil film formation and affecting the service life of the equipment.
Design an oil nozzle structure including an inlet, a transition section and a connecting section. The oil nozzle is embedded in the bearing and is provided with an oil injection hole and a transition channel to increase the oil outlet area and reduce scratches on the alloy side hole wall, ensuring the formation of a high-pressure oil film.
The design of the oil nozzle structure ensures the formation of a high-pressure oil film, improves the efficiency of the top shaft oil, and extends the service life of the equipment.
Smart Images
Figure CN223676348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical lubrication technical field, especially relate to an oil nozzle structure and bearing. BACKGROUND
[0002] In the structure of steam turbine, sliding bearing supports rotor, when rotor starts to rotate, high pressure top shaft oil passes through high pressure oil hole in the bottom of sliding bearing to lift rotor, so that rotor drives high pressure oil to form protective oil film when rotating, avoiding dry friction between rotor and bearing to damage bearing. SUMMARY
[0003] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:
[0004] The utility model provides an oil nozzle structure, including oil nozzle, the oil nozzle can be embeddedly installed in bearing, the oil nozzle includes mouth, transition part and connecting part, the transition part connects mouth and connecting part.
[0005] Further, the oil nozzle is provided with an oil injection hole arranged along the central axis of the oil nozzle.
[0006] Further, the oil nozzle is provided with an oil injection hole arranged along the central axis of the oil nozzle.
[0007] Further, the cross section of the mouth is in the shape of a circular truncated cone, and the width of the end of the mouth away from the transition part is greater than the width of the other end.
[0008] Further, the outer side of the connecting part is provided with a screw thread for connecting with the bearing.
[0009] The utility model further provides a bearing, and the bearing is provided with an oil channel, the oil channel includes an oil outlet hole, the outer end of the oil outlet hole is provided with a transition channel, the shape of the transition channel is matched with the shape of the mouth of the oil nozzle, so that the mouth of the oil nozzle can be embeddedly installed in the bearing.
[0010] Further, the transition channel is trumpet-shaped with the outside larger than the inside, and the contact area is increased,
[0011] Further, a connecting area is arranged on the oil outlet hole near the transition channel, and is connected with the connecting part of the oil nozzle.
[0012] Further, an alloy layer is arranged on the bearing, and the transition channel is arranged on the alloy layer and the position where the alloy layer is connected with the bearing.
[0013] Further, sealing glue is coated between the connecting area and the connecting part, so that the sealing effect between the oil nozzle structure and the bearing is ensured.
[0014] Preferably, the bearing further comprises a bearing seat, a rotor and at least one tilting pad, the tilting pad is movably fixed on the bearing seat in an inner storage mode and is distributed in a circumferential direction of the bearing seat, the rotor is arranged on the inner side of the bearing seat in a ring mode, is arranged eccentrically with the bearing seat and is rotatably arranged relative to the bearing seat, and the oil nozzle penetrates the tilting pad in a radial direction of the bearing seat.
[0015] The oil passage further comprises an oil channel, the oil outlet hole is communicated with the oil channel, and the oil channel forms a circulating loop with a cooling oil cavity of the tilting pad.
[0016] The utility model has the following beneficial effects:
[0017] The transition channel is arranged on the alloy layer and the position where the alloy layer is connected with the bearing, the shape of the transition channel is matched with the shape of the mouth part of the oil nozzle, the mouth part of the oil nozzle can be embeddedly installed in the transition channel, the alloy side hole wall is prevented from being scratched, the pressure of the top shaft oil is concentrated on the rotor when the top shaft oil is started, the formation of the oil film of the rotor is ensured, and the effect of the top shaft oil is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a plane structure schematic view of the oil nozzle in embodiment 1.
[0019] Figure 2 is Figure 1 a top view in the figure.
[0020] Figure 3This is a schematic diagram of the bearing without the grease nipple installed in Example 2.
[0021] Figure 4 This is a schematic diagram of the bearing with the grease nipple installed in Example 2.
[0022] Figure 5 yes Figure 4 A magnified view of A in the middle.
[0023] Figure 6 This is a schematic diagram of a bearing in the prior art without an oil nozzle installed.
[0024] Figure 7 yes Figure 6 A magnified view of B in the middle. Detailed Implementation
[0025] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. It should be noted that the embodiments are only specific descriptions of the utility model and should not be regarded as limitations on the utility model. The purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical solution of this utility model. The protection scope of this utility model should still be determined by the scope defined in the claims.
[0026] Example 1
[0027] like Figures 1-2 As shown, this embodiment provides an oil nozzle structure, including an oil nozzle 1, which can be embedded in a bearing 2. The oil nozzle 1 includes an opening 11, a transition portion 12, and a connecting portion 13, with the transition portion 12 connecting the opening 11 and the connecting portion 13. By providing the opening 11, the oil outlet area of the oil nozzle 1 can be increased, and when the rotor rotates, it drives high-pressure oil to form a protective oil film.
[0028] The nozzle 1 has an oil injection hole 14 arranged along its central axis. The opening has a first stepped hole 141 and a second stepped hole 142, both communicating with the oil injection hole 141. The opening 11 has a frustum-shaped cross-section, with the width at the end furthest from the transition portion greater than the width at the other end. This increases the oil outlet area of the nozzle, allowing high-pressure oil to form a protective oil film when the rotor rotates. The connecting portion 13 has threads on its outer side for connection with the bearing 2.
[0029] Example 2
[0030] like Figures 3-5As shown in the drawings, the embodiment provides a bearing 2, which is provided with an oil passage 21, the oil passage 21 comprises an oil outlet hole 211, the outer end of the oil outlet hole 211 is provided with a transition passage 212, the shape of the transition passage 212 matches the shape of the mouth part 11 of the oil nozzle 1, so that the mouth part 11 of the oil nozzle 1 can be embeddedly installed therein. The transition passage is in the shape of a horn with the outside being larger than the inside, by increasing the contact area, the oil outlet hole close to the transition passage 212 is provided with a connecting area 213 for connecting with the connecting part 13 of the oil nozzle 1. The bearing 2 is provided with an alloy layer 22, and the transition passage 212 is arranged at the position where the alloy layer 22 and the bearing 2 are connected. As Figures 6-7 As shown in the drawings, the material hardness of the alloy layer 22 and the bearing 2 is different, when directly drilling, the drill bit drills to the position where the alloy layer 22 and the bearing are connected to drive the iron filings to scratch the hole wall of the alloy side, at the moment of starting the high-pressure top shaft oil, the pressure area increases, the pressure acting on the rotor decreases, thereby causing the phenomenon of insufficient oil film formation, affecting the service life of the equipment, the scheme can reduce the scratches on the hole wall of the alloy side by arranging the transition passage 212 at the position where the alloy layer 22 and the bearing 2 are connected, ensure that the pressure is fully concentrated on the rotor when the top shaft oil starts, ensure the formation of the rotor protection oil film, and improve the action efficiency of the top shaft oil.
[0031] The connecting area 213 and the connecting part 13 are coated with sealant to ensure the sealing effect between the oil nozzle structure and the bearing 2.
[0032] The bearing further comprises a bearing seat, a rotor and at least one tilting pad, the tilting pad is movably fixed on the bearing seat in a storage mode and is distributed in a circumferential direction of the bearing seat; the rotor is arranged on the inner side of the bearing seat in a ring sleeve mode, is arranged eccentrically with the bearing seat, and is rotatably arranged relative to the bearing seat, and the oil nozzle penetrates the tilting pad in a radial direction of the bearing seat.
[0033] The oil passage 21 further comprises an oil channel 214, the oil outlet hole 211 is communicated with the oil channel 214, and forms a circulating loop with a cooling oil cavity of the tilting pad.
[0034] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.
[0035] It should be noted that the technical features not described in detail in the utility model can be realized by any existing technology.
Claims
1. A flow nozzle structure, characterized by, The oil nozzle is embeddedly installed in the bearing, and comprises a mouth, a transition and a connecting part, the transition connects the mouth and the connecting part; the cross section of the mouth is in the shape of a truncated cone, and the width of the mouth at one end away from the transition is greater than that at the other end.
2. A nozzle structure according to claim 1, wherein The oil nozzle is provided with an oil injection hole arranged along the central axis of the oil nozzle.
3. The oil nozzle structure of claim 1, wherein The mouth is provided with a first stepped hole and a second stepped hole, and the first stepped hole and the second stepped hole are communicated with the oil injection hole.
4. The oil nozzle structure of claim 1, wherein The outer side of the connecting part is provided with a thread.
5. A bearing, characterized by The bearing is provided with an oil passage, and the oil passage comprises an oil outlet hole, the outer end of the oil outlet hole is provided with a transition passage, the shape of the transition passage matches the shape of the mouth of the oil nozzle, so that the mouth of the oil nozzle of any one of claims 1-4 can be embeddedly installed therein.
6. A bearing according to claim 5, wherein The transition passage is in the shape of a horn with the outer side being larger than the inner side.
7. A bearing according to claim 5, wherein The oil outlet hole close to the transition passage is provided with a connecting area for connecting with the connecting part of the oil nozzle.
8. A bearing according to claim 5, wherein The bearing is provided with an alloy layer, and the transition passage is arranged at the position where the alloy layer and the bearing are connected.
9. A bearing according to claim 7, wherein The connecting area and the connecting part are coated with sealing glue.