Gearbox for high-power ocean vessel

Abstract

The utility model relates to the technical field of gear boxes, in particular to a gear box for a high-power ocean vessel. The gear box comprises a box body, a PTO shaft, a gear shaft, a clutch oil cylinder and an output shaft are rotationally installed in the box body, the PTO shaft is in transmission connection with the clutch oil cylinder, the clutch oil cylinder is connected with the gear shaft through a clutch, an output gear is arranged on the output shaft and comprises an outer gear ring and an installation disc, and the installation disc is detachably connected to the inner side of the outer gear ring. The outer gear ring is connected with the gear shaft in a meshed mode, and a plurality of weight reduction grooves are formed in the installation disc. During use, the clutch oil cylinder drives the gear shaft and the output shaft to rotate through the clutch to provide power for advancing of a ship. Meanwhile, the clutch oil cylinder drives the PTO shaft to rotate so as to drive an external generator to generate electricity. The split type design is adopted for the output gear, the weight reduction groove is formed in the installation disc, the high-power transmission requirement can be met, the overall weight of the output gear is lighter, and the output gear is easier to assemble and disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field, concretely relates to a high -power ocean going ship gear box. BACKGROUND

[0002] With the development of ocean fishery, in order to meet the reliability and safety of deep sea operation, the overall design puts forward higher requirements to the transmission performance of main power system. As the key equipment of ship main propulsion mechanical system, the marine gear box bears the deceleration function, power transmission and torque transmission of navigation system, and plays an important role in the development of fishery.

[0003] The existing marine gear box generally bears the maximum power of 6000kW and below, and the size of the parts in the gear box needs to be larger for the high-power gear box of 6000kW and above for oceanic krill. The structure of the existing marine gear box has some problems when applied to the high-power gear box, wherein the large gear on the output shaft in the existing gear box is integral type, the diameter reaches two meters, and the weight reaches ten tons, which greatly increases the weight of the whole gear box and also increases the cost. The span of the PTO shaft for providing power for the power generation device reaches 2m, and the PTO shaft is usually supported by bearings at both ends. The middle part of the PTO shaft supported at both ends has large deflection and poor stability. SUMMARY

[0004] In view of the above defects, the technical problem to be solved by the utility model is to provide a high-power ocean going ship gear box, which can bear high-power transmission and has lower overall weight.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A high-power ocean going ship gear box, comprising a box body, a PTO shaft, a gear shaft, a clutch oil cylinder and an output shaft are rotatably installed in the box body, the PTO shaft is in transmission connection with the clutch oil cylinder, the clutch oil cylinder is coaxially arranged with the gear shaft, the clutch oil cylinder is connected with the gear shaft through a clutch, an output gear is arranged on the output shaft, the output gear comprises an outer gear ring and a mounting disc, the mounting disc is detachably connected to the inner side of the outer gear ring, the mounting disc is arranged on the output shaft, the outer gear ring is in meshing connection with the gear shaft, and a plurality of lightening grooves are arranged on the mounting disc.

[0007] By adopting the above scheme, when in use, the clutch oil cylinder drives the gear shaft to rotate through the clutch, the gear shaft drives the output shaft to rotate through the output gear, and the power for the ship to move forward is output through the output shaft. At the same time, the clutch oil cylinder drives the PTO shaft to rotate, and the power is output to the outside through the PTO shaft, and the external generator is driven to generate electricity through the PTO shaft. The output gear adopts a split design of an outer gear ring and a mounting disc, and a plurality of lightening grooves are formed in the mounting disc, which can meet the demand of high-power transmission and make the overall weight of the output gear lighter, and the output gear is easier to assemble and disassemble.

[0008] Preferably, all the lightening grooves are arranged on the same side of the mounting disc.

[0009] Preferably, all the lightening grooves are uniformly distributed on the mounting disc in the circumferential direction. The uniform distribution of the lightening grooves on the mounting disc makes the overall structural load-bearing capacity of the mounting disc more uniform.

[0010] Preferably, the thickness of the mounting disc gradually decreases from the middle part to the edge.

[0011] Preferably, a plurality of lightening holes corresponding to the lightening grooves are formed in the mounting disc, and the lightening holes are in communication with the corresponding lightening grooves. The lightening holes further reduce the overall weight of the output gear.

[0012] Preferably, the inner side of the outer gear ring is provided with a flange in the circumferential direction, and the mounting disc is connected with the flange through at least two bolts. The mounting disc and the flange are connected through bolts, which makes the mounting and dismounting of the mounting disc and the outer gear ring more convenient.

[0013] Preferably, the box body comprises an upper cover, an upper box, a middle box and a lower box connected in sequence, the PTO shaft is rotatably installed between the upper cover and the upper box, the gear shaft and the clutch oil cylinder are rotatably installed between the upper box and the middle box, and the output shaft is rotatably installed between the middle box and the lower box. The upper cover, the upper box, the middle box and the lower box are combined to form the box body, which makes the installation and dismounting of the parts inside the box body more convenient.

[0014] Preferably, the upper cover and the middle box body are provided with a first bearing seat, a second bearing seat and a third bearing seat distributed along the same axis, the PTO shaft is connected with the first bearing seat through a first bearing, the PTO shaft is connected with the second bearing seat through a second bearing, and the PTO shaft is connected with the third bearing seat through a third bearing. Since the PTO shaft of the high-power gear box has a large span, the first bearing seat, the second bearing seat and the third bearing seat are matched with corresponding bearings, so that three-point support is formed for the PTO shaft, thereby avoiding the disturbance caused by the large span of the slender shaft, and under the action of high elastic compensation, the rolling bearing in the shaft generator can be prevented from bearing the eccentric load as much as possible, and the reliability of the ship power system transmission is greatly enhanced.

[0015] Preferably, the utility model also includes a four-point ball bearing, the four-point ball bearing is arranged on the PTO shaft, and the PTO shaft is connected with the third bearing seat through the third bearing and the four-point ball bearing. The four-point ball bearing bears the axial force, and effectively reduces the axial movement of the PTO shaft.

[0016] Preferably, the first bearing is a self-aligning roller bearing, and the second bearing and the third bearing are both cylindrical roller bearings.

[0017] In summary, the high-power gear box for ocean-going ships provided by the utility model has at least the following beneficial effects:

[0018] 1. The overall structure of the gear box is lighter, and the gear box is convenient to install and disassemble.

[0019] 2. The PTO shaft with a large span has small disturbance and strong transmission stability. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without the novelty labor of the person skilled in the art.

[0021] Figure 1 It is the front view of the utility model;

[0022] Figure 2 It is Figure 1 It is the sectional view of A-A in the middle;

[0023] Figure 3 It is the structural schematic view of the output gear in the utility model;

[0024] Figure 4 It is the structural schematic view of the PTO shaft in the utility model.

[0025] The reference signs include: a box body 1, an upper cover 101, an upper box 102, a middle box 103, a lower box 104, a PTO shaft 2, a gear shaft 3, a clutch oil cylinder 4, an output shaft 5, an output gear 6, an outer gear ring 601, a mounting disc 602, a weight reduction groove 603, a weight reduction hole 604, a flange 605, a bolt 7, a first bearing 8, a second bearing 9, a third bearing 10, a four-point ball bearing 11, a shaft hole 12, an input flange 13, a transmission gear ring 14, a transmission gear 15, a clutch 16. DETAILED DESCRIPTION

[0026] In order to enable a person skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the accompanying drawings. Figures 1-4 and the specific embodiments.

[0027] Please refer to Figures 1-4 The utility model provides a kind of high-power ocean-going ship gear box, including box body 1, PTO shaft 2, gear shaft 3, clutch oil cylinder 4 and output shaft 5 are rotatably installed in box body 1.PTO shaft 2 is connected with clutch oil cylinder 4, clutch oil cylinder 4 is coaxially arranged with gear shaft 3, clutch oil cylinder 4 is connected with gear shaft 3 by clutch 16.Output shaft 5 is equipped with output gear 6, and output gear 6 includes outer gear ring 601 and mounting disc 602, and mounting disc 602 is detachably connected to the inner side of outer gear ring 601, and mounting disc 602 is arranged on output shaft 5, and outer gear ring 601 is engagedly connected with gear shaft 3, and mounting disc 602 is equipped with a plurality of weight reduction grooves 603.The left end of clutch oil cylinder 4 is fixedly connected with transmission gear ring 14, and PTO shaft 2 is equipped with transmission gear 15, and transmission gear 15 is engagedly connected with transmission gear ring 14.The diameter of output gear 6 is greater than the diameter of gear on gear shaft 3.The overall diameter of output gear 6 is 2033mm, and outer gear ring 601 can be made of forged steel material 20CrMnMo, and mounting disc 602 can be made of cast steel ZG310-570 material.

[0028] Please continue to refer to Figure 2 and Figure 3All the weight reduction grooves 603 are arranged on the same side of the mounting disc 602, and the weight reduction grooves 603 are arranged on the left side of the mounting disc 602 in particular. All the weight reduction grooves 603 are uniformly distributed along the circumferential direction of the mounting disc 602. The thickness of the mounting disc 602 gradually decreases from the middle part to the edge. The mounting disc 602 is provided with a plurality of weight reduction holes 604 corresponding to the weight reduction grooves 603. The weight reduction holes 604 are in communication with the corresponding weight reduction grooves 603. The middle part of the mounting disc 602 is provided with a shaft hole 12. The output shaft 5 is fixed in the shaft hole 12. The inner side of the outer ring gear 601 is provided with a flange 605 along the circumferential direction. The mounting disc 602 is connected with the flange 605 through at least two bolts 7. The flange 605 is provided with a plurality of first mounting holes corresponding to the bolts 7 along the axial direction of the outer ring gear 601. The mounting disc 602 is provided with a plurality of second mounting holes corresponding to the bolts 7 along the axial direction. The bolts 7 are arranged in the corresponding first mounting holes and second mounting holes. The bolts 7 can be hinge hole bolts in the prior art.

[0029] Please continue to refer to Figure 1 and Figure 4 The box body 1 comprises an upper cover 101, an upper box 102, a middle box 103 and a lower box 104 connected in sequence from top to bottom. The upper box 102 and the middle box 103 are through boxes. The upper end opening of the upper box 102 is closed by the upper cover 101. The upper end opening of the lower box 104 is closed by the upper cover 101. The upper cover 101, the upper box 102, the middle box 103 and the lower box 104 jointly form a mounting chamber. The PTO shaft 2 is rotatably mounted between the upper cover 101 and the upper box 102. The gear shaft 3 and the clutch oil cylinder 4 are rotatably mounted between the upper box 102 and the middle box 103. The output shaft 5 is rotatably mounted between the middle box 103 and the lower box 104. Specifically, the first bearing seat, the second bearing seat and the third bearing seat are arranged along the same axis between the upper cover 101 and the middle box 103. The first bearing seat, the second bearing seat and the third bearing seat are arranged in sequence from left to right. The first bearing seat, the second bearing seat and the third bearing seat each comprise two seat bodies. The seat bodies are provided with bearing holes with a half-hole structure. When the two seat bodies are combined together, the two half-hole structure bearing holes are combined to form a complete bearing hole. One of the two seat bodies is integrally formed with the upper cover 101, and the other is integrally formed with the upper box 102. The PTO shaft 2 is connected with the first bearing seat through the first bearing 8. The PTO shaft 2 is connected with the second bearing seat through the second bearing 9. The PTO shaft 2 is connected with the third bearing seat through the third bearing 10.

[0030] Please continue to refer to Figure 4Also included is a four-point ball bearing 11, which is arranged on the PTO shaft 2 and is located on the left side of the third bearing 10, and the PTO shaft 2 is connected with the third bearing seat through the third bearing 10 and the four-point ball bearing 11. The first bearing 8 is a self-aligning roller bearing, and the second bearing 9 and the third bearing 10 are both cylindrical roller bearings.

[0031] By adopting the above scheme, in use, power can be provided by the PTO shaft 2 in an idle state, for power generation of a power generation device on the ship, and the electric energy generated by the power generation device is stored through an energy storage device to ensure the power demand in ocean navigation. When power generation is not required, the power input end of the power generation device is disconnected from the PTO shaft 2, and the PTO shaft 2 idles. The marine main engine transmits power to the input flange 13 connected to the clutch oil cylinder 4, the input flange 13 drives the clutch oil cylinder 4 to rotate, the clutch oil cylinder 4 drives the gear shaft 3 to rotate through the clutch 16, the gear shaft 3 drives the output shaft 5 to rotate through the output gear 6, and the power for the ship to move forward is output through the output shaft 5. The output gear 6 adopts a split design of an outer gear ring 601 and a mounting disc 602, and a plurality of lightening grooves 603 and lightening holes 604 are formed in the mounting disc 602, which makes the output gear 6 meet the transmission demand of high power, and the overall weight of the output gear 6 is lighter, and the output gear 6 is easier to assemble and disassemble.

[0032] It should be noted that the words indicating the orientation, such as up and down, in this article are set in the direction of Figure 1 , only for the convenience of description, and do not have other specific meanings.

[0033] It should also be noted that in this article, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the article or device including the element.

[0034] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A high-power marine gear box, characterized in that, The utility model provides a PTO shaft, gear shaft, clutch oil cylinder and output shaft are rotatably installed in the box body, the PTO shaft is transmission connection with the clutch oil cylinder, the clutch oil cylinder is coaxial with gear shaft, the clutch oil cylinder is connected with gear shaft through clutch, the output shaft is equipped with output gear, the output gear includes outer gear ring and mounting disc, the mounting disc is detachably connected in the inside of outer gear ring, the mounting disc is arranged on the output shaft, the outer gear ring is engagedly connected with gear shaft, the mounting disc is equipped with a plurality of lightening groove.

2. A high-power marine gear box according to claim 1, characterized in that All the lightening grooves are arranged on the same side of the mounting disc.

3. A high-power marine gear box according to claim 1, characterized in that, All the lightening grooves are evenly distributed on the mounting disc along the circumferential direction.

4. A high-power marine gear box according to claim 1, characterized in that, The thickness of the mounting disc gradually decreases from the middle to the edge.

5. A high-power marine gear box according to claim 1, characterized in that, A plurality of lightening holes corresponding to the lightening grooves are formed in the mounting disc, and the lightening holes are in communication with the corresponding lightening grooves.

6. A high-power marine gear box according to any one of claims 1-5, characterized in that The inner side of the outer gear ring is provided with a flange along the circumference, and the mounting disc and the flange are connected by at least two bolts.

7. A high-power marine gear box according to claim 6, characterized in that The box body includes an upper cover, an upper box body, a middle box body and a lower box body connected in sequence, the PTO shaft is rotatably installed between the upper cover and the upper box body, the gear shaft and the clutch oil cylinder are both rotatably installed between the upper box body and the middle box body, and the output shaft is rotatably installed between the middle box body and the lower box body.

8. A high-power marine gear box according to claim 7, characterized in that First, second and third bearing seats distributed along the same axis are arranged between the upper cover and the middle box body, the PTO shaft is connected with the first bearing seat through the first bearing, the PTO shaft is connected with the second bearing seat through the second bearing, and the PTO shaft is connected with the third bearing seat through the third bearing.

9. A high-power marine gear box according to claim 8, characterized in that A four-point ball bearing is further arranged on the PTO shaft, and the PTO shaft is connected with the third bearing seat through the third bearing and the four-point ball bearing.

10. A high-power marine gear box according to claim 9, characterized in that The first bearing is a self-aligning roller bearing, and the second and third bearings are both cylindrical roller bearings.

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