Hydraulic center rotating device for ship propeller

Abstract

The hydraulic center rotating device comprises a center rotating shell and a center rotating shaft rotationally installed in the center rotating shell, the two ends of the center rotating shaft extend to the outside, and a first connecting hole and a second connecting hole are formed in the top end of the center rotating shell respectively. A first connecting part and a second connecting part are arranged at the bottom end of the center rotating shaft, a first annular channel and a second annular channel are coaxially arranged between the center rotating shaft and the center rotating shell in a sealed mode, a first oil inlet hole and a first oil outlet hole are formed in the center rotating shell, and a second oil outlet hole and a second oil inlet hole are formed in the bottom end of the center rotating shaft. The first oil inlet hole, the first annular channel and the second oil outlet hole form an oil inlet channel, the second oil inlet hole, the second annular channel and the first oil outlet hole form an oil outlet channel, and the oil inlet channel and the oil outlet channel are mutually independent. According to the utility model, rotary transmission of hydraulic power can be realized, meanwhile, higher axial load can be borne, and the use requirements of ship propellers can be better met.

Description

Technical Field

[0001] The utility model relates to the technical field of ship fittings, in particular to a hydraulic central slewing device for a ship propeller. Background Art

[0002] A ship propeller refers to an energy converter in a ship propulsion device, which converts the power generated by an engine into the thrust for the ship to move forward, so as to overcome the resistance of the ship sailing in water and push the ship forward, such as a propeller, a paddle wheel, a water jet propeller, a jet propeller, a ducted propeller and a cycloidal propeller, among which the most common one is the propeller. For some ship types with a large length-width ratio, it is difficult to turn in narrow waterways. Therefore, a propeller that can slewing 360° needs to be designed. Considering that the propeller is applied to the underwater environment, the power source is preferably hydraulic drive. The propeller rotates by itself through a hydraulic motor, and the propeller itself needs to slewing 360°. Therefore, how to transmit the external hydraulic power to the hydraulic motor without causing the winding of hydraulic pipelines is an urgent problem to be solved. In addition, as the propeller for ships itself has a large weight, when solving the problem of rotating hydraulic power transmission, the problem of axial load on the rotating shaft needs to be considered. Content of the Utility Model

[0003] The purpose of the utility model is to provide a hydraulic central slewing device for a ship propeller aiming at the deficiencies of the prior art, which can not only realize the rotary transmission of hydraulic power, but also bear a high axial load, and better meet the use requirements of the ship propeller.

[0004] The technical solution for realizing the purpose of the utility model is as follows:

[0005] A hydraulic central slewing device for a ship propeller includes a fixedly arranged central slewing housing and a central slewing shaft coaxially and rotatably installed in the central slewing housing. Both ends of the central slewing shaft extend to the outside of the central slewing housing. The top ends of the central slewing shaft and the central slewing housing are respectively provided with a first connection hole and a second connection hole, and the bottom ends are respectively provided with a first connection part and a second connection part. A first annular channel and a second annular channel are coaxially and hermetically arranged between the central slewing shaft and the central slewing housing. The central slewing housing is provided with a first oil inlet hole and a first oil outlet hole. The bottom end of the central slewing shaft is provided with a second oil outlet hole and a second oil inlet hole. The first oil inlet hole, the first annular channel and the second oil outlet hole form an oil inlet channel, and the second oil inlet hole, the second annular channel and the first oil outlet hole form an oil outlet channel. The oil inlet channel and the oil outlet channel are independent of each other.

[0006] Furthermore, bearings are axially limited and arranged on the inner walls at both ends of the central slewing housing. The outer ring and the inner ring of the bearing are respectively in interference fit with the central slewing housing and the central slewing shaft.

[0007] Further, an annular boss is provided at the bottom end of the central rotating shaft, and a retaining ring is coaxially and detachably fixed on the top end thereof. Annular notches are provided on the inner walls at both ends of the central rotating housing. The two bearings are respectively arranged in the two annular notches, and the inner rings of the outer ends are respectively abutted against the annular boss and the retaining ring.

[0008] Further, a thread is provided at the top end of the central rotating shaft, and a locking ring with a thread is provided at the upper end of the retaining ring and is installed on the central rotating shaft. The retaining ring is pressed against the corresponding bearing through the locking ring.

[0009] Further, the bearing is a tapered roller bearing.

[0010] Further, both the first connecting portion and the second connecting portion are annular structures and are integrally formed with the central rotating shaft and the central rotating housing respectively. A plurality of through holes are evenly arranged along the circumferential direction on the annular structure.

[0011] Further, skeleton oil seals are provided on both sides of the first annular channel and the second annular channel.

[0012] Further, connectors are installed on the first oil inlet hole, the first oil outlet hole, the second oil inlet hole and the second oil outlet hole.

[0013] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0014] (1) The utility model forms a loop through the oil inlet channel and the oil outlet channel to realize the transportation of hydraulic oil, and cleverly uses the annular channel to realize the rotary transmission of hydraulic power, solving the problem of pipeline entanglement. At the same time, by setting the first connection hole, the first connecting portion, the second connection hole and the second connecting portion, it is convenient to hoist the top of the device to the bottom of the ship through the first connection hole and the second connection hole, and connect it with the propeller at the lower end through the first connecting portion and the second connecting portion, so that both the central rotating shaft and the central rotating housing are axially stressed in both directions, changing the traditional structure in which the central rotating shaft and the central rotating housing respectively bear opposite axial forces, effectively solving the problem of the decline of the rotary sealing performance caused by too high axial load, so that it can bear a higher axial load and better meet the use requirements of the ship propeller.

[0015] (2) The utility model realizes the rotational connection between the central rotating shaft and the central rotating housing through the bearing, and axially limits the bearings arranged in the annular notches respectively through the annular boss and the retaining ring, with a simple structure and convenient assembly.

[0016] (3) The utility model realizes the detachable fixed connection between the retaining ring and the central rotating shaft through the locking ring connected by threads, which is convenient for disassembly and assembly.

[0017] (4) The bearing of the present utility model adopts a tapered roller bearing, which can withstand large axial loads, has relatively high rotational speed and accuracy, large rigidity, can withstand impact and vibration loads, and improves the rotational reliability of the central rotating shaft and the central rotating housing.

[0018] (5) The first connecting part and the second connecting part of the present utility model are integrally formed with the central rotating shaft and the central rotating housing respectively, which is convenient for processing, has higher connection strength, and is convenient for connection through the preset through holes.

[0019] (6) The present utility model realizes the sealing on both sides of the annular channel through a skeleton oil seal, has excellent sealing performance, has a reinforcing skeleton, is not easy to deform, and has a longer service life.

[0020] (7) A joint is pre-installed on the oil hole of the present utility model, which is convenient for the connection of the oil pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the drawings, where:

[0022] Figure 1 is a perspective view of the present utility model;

[0023] Figure 2 is a schematic diagram of the internal structure of the present utility model.

[0024] The reference numerals in the drawings are:

[0025] Central rotating housing 1, central rotating shaft 2, annular boss 2-1, first connecting hole 3, second connecting hole 4, first connecting part 5, second connecting part 6, first annular channel 7, second annular channel 8, first oil inlet hole 9, first oil outlet hole 10, second oil outlet hole 11, second oil inlet hole 12, bearing 13, retaining ring 14, locking ring 15, skeleton oil seal 16, joint 17. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to better understand the above technical solutions, the following will detail the above technical solutions in conjunction with the drawings of the specification and specific embodiments.

[0027] (Embodiment 1)

[0028] As Figures 1 to 2The hydraulic center rotating device for ship propeller shown in the figure includes a fixed center rotating shell 1 and a center rotating shaft 2 coaxially installed in the center rotating shell 1, and both ends of the center rotating shaft 2 extend to the outside of the center rotating shell 1, and the top ends of the center rotating shaft 2 and the center rotating shell 1 are respectively provided with a first connecting hole 3 and a second connecting hole 4, and the bottom ends are respectively provided with a first connecting part 5 and a second connecting part 6, so that the top of the device can be hoisted to the bottom of the ship through the first connecting hole 3 and the second connecting hole 4, and connected to the propeller at the lower end through the first connecting part 5 and the second connecting part 6, so that the axial directions of the center rotating shaft 2 and the center rotating shell 1 are subjected to bidirectional force. A first annular channel 7 and a second annular channel 8 are coaxially sealed between the central rotating shaft 2 and the central rotating housing 1. A first oil inlet hole 9 and a first oil outlet hole 10 are provided on the central rotating housing 1. A second oil outlet hole 11 and a second oil inlet hole 12 are provided at the bottom of the central rotating shaft 2. The first oil inlet hole 9, the first annular channel 7 and the second oil outlet hole 11 are connected in sequence to form an oil inlet channel. The second oil inlet hole 12, the second annular channel 8 and the first oil outlet hole 10 are connected in sequence to form an oil outlet channel. The oil inlet channel and the oil outlet channel are independent of each other and form a hydraulic circuit after being connected with an external hydraulic pipeline. The annular channel is cleverly used to realize the rotary transmission of hydraulic power and solve the problem of pipeline winding. Compared with the traditional rotary structure in which the central rotating shaft 2 and the central rotating housing 1 bear opposite axial forces respectively, it effectively solves the problem of decreased rotary sealing performance caused by excessive axial load, so that it can withstand higher axial loads and better meet the use requirements of ship propellers.

[0029] Specifically, an annular notch is provided on the inner wall at both ends of the central rotating housing 1, and a bearing 13 is provided in the annular notch. The outer ring and the inner ring of the bearing 13 are respectively interference fit with the central rotating housing 1 and the central rotating shaft 2, so as to realize the rotation connection. The bottom end of the central rotating shaft 2 is provided with an annular boss 2-1, and the top end is provided with a thread, and a retaining ring 14 and a locking ring 15 are coaxially sleeved from bottom to top. The outer inner rings of the two bearings 13 are respectively abutted against the annular boss 2-1 and the retaining ring 14, and the locking ring 15 is threadedly installed on the central rotating shaft 2. The retaining ring 14 is pressed on the corresponding bearing through the locking ring 15, so that the retaining ring 14 can be detachably fixed on the central rotating shaft 2, and the overall structure is simple and easy to assemble. In order to improve the reliability of the rotation connection between the central rotating housing 1 and the central rotating shaft 2, the bearing 13 of this embodiment adopts a tapered roller bearing, which can withstand a large axial load, has a high speed and precision, has high rigidity, and is resistant to impact and vibration loads.

[0030] The first connection part 5 and the second connection part 6 are both annular structures and are respectively integrally formed with the central rotating shaft 2 and the central rotating housing 1, which are easy to process and have higher connection strength. A plurality of through holes are evenly opened along the circumference of the annular structure to facilitate connection with external structures.

[0031] In order to improve the sealing performance of the first annular channel 7 and the second annular channel 8, skeleton oil seals 16 are provided on both sides of the first annular channel 7 and the second annular channel 8 in this embodiment. The sealing performance is excellent, it has a reinforcing skeleton, is not easily deformed, and has a longer service life.

[0032] In order to facilitate the connection of external oil pipeline, connectors 17 are installed on the first oil inlet hole 9, the first oil outlet hole 10, the second oil inlet hole 12 and the second oil outlet hole 11 in this embodiment.

[0033] The utility model forms a loop through the oil inlet channel and the oil outlet channel to realize the transportation of hydraulic oil, and cleverly uses the annular channel to realize the rotary transmission of hydraulic power, solving the problem of pipeline entanglement. At the same time, by setting the first connection hole, the first connection part, the second connection hole and the second connection part, it is convenient to hoist the top of the device on the bottom of the ship through the first connection hole and the second connection hole, and connect it with the propeller at the lower end through the first connection part and the second connection part, so that the axial directions of the central rotating shaft and the central rotating housing are both stressed bidirectionally, changing the traditional structure in which the central rotating shaft and the central rotating housing bear opposite axial forces respectively, effectively solving the problem of the decline of the rotary sealing performance caused by too high axial load, so that it can bear a higher axial load and better meet the use requirements of the ship propeller.

[0034] The specific embodiments described above further elaborate on the purpose, technical solutions and beneficial effects of the utility model. It should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic center rotation device for a ship propeller, characterized in that: It includes a fixed central rotating shell and a central rotating shaft coaxially installed in the central rotating shell, both ends of the central rotating shaft extend to the outside of the central rotating shell, the top ends of the central rotating shaft and the central rotating shell are respectively provided with a first connecting hole and a second connecting hole, and the bottom ends are respectively provided with a first connecting part and a second connecting part, a first annular channel and a second annular channel are coaxially sealed between the central rotating shaft and the central rotating shell, a first oil inlet hole and a first oil outlet hole are provided on the central rotating shell, and a second oil outlet hole and a second oil inlet hole are opened at the bottom end of the central rotating shaft, the first oil inlet hole, the first annular channel and the second oil outlet hole form an oil inlet channel, the second oil inlet hole, the second annular channel and the first oil outlet hole form an oil outlet channel, and the oil inlet channel and the oil outlet channel are independent of each other.

2. A hydraulic center rotation device for a ship propeller according to claim 1, characterized in that: The inner walls at both ends of the central rotating shell are provided with bearings along the axial limit, and the outer ring and the inner ring of the bearing are respectively interference fit with the central rotating shell and the central rotating shaft.

3. A hydraulic center rotation device for a ship propeller according to claim 2, characterized in that: An annular boss is provided at the bottom end of the central rotating shaft, and a retaining ring is coaxially and detachably fixedly sleeved at the top end. Annular notches are provided on the inner walls at both ends of the central rotating shell. The two bearings are respectively arranged in the two annular notches and the inner rings at the outer ends are respectively in contact with the annular boss and the retaining ring.

4. A hydraulic center rotation device for a ship propeller according to claim 3, characterized in that: The top end of the central rotating shaft is provided with a thread, and the upper end of the retaining ring is provided with a locking ring threadedly mounted on the central rotating shaft, and the retaining ring is tightly pressed on the corresponding bearing through the locking ring.

5. The hydraulic center rotation device for a ship propeller according to claim 2, characterized in that: The bearing is a tapered roller bearing.

6. The hydraulic center rotation device for a ship propeller according to claim 1, characterized in that: The first connecting portion and the second connecting portion are both annular structures and are respectively formed integrally with the central rotating shaft and the central rotating shell. A plurality of through holes are evenly opened in the circumferential direction on the annular structure.

7. The hydraulic center rotation device for a ship propeller according to claim 1, characterized in that: Skeleton oil seals are provided on both sides of the first annular channel and the second annular channel.

8. The hydraulic center rotation device for a ship propeller according to claim 1, characterized in that: The first oil inlet hole, the first oil outlet hole, the second oil inlet hole and the second oil outlet hole are all equipped with joints.

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