Multifunctional gas turbine auxiliary transmission gear box and gas turbine system

Abstract

The invention provides a multifunctional gas turbine auxiliary transmission gear box and a gas turbine system, and relates to the technical field of mechanical transmission, and the multifunctional gas turbine auxiliary transmission gear box comprises a box shell, a lubricating oil pump connecting gear shaft and an oil-gas separation shell. An oil-gas interface and an oil return port are formed in the tank shell; the lubricating oil pump connecting gear shaft is rotatably matched with the box shell, the first end of the lubricating oil pump connecting gear shaft is used for being connected with an input shaft of the lubricating oil pump, and the second end, opposite to the first end, of the lubricating oil pump connecting gear shaft is connected with the oil-gas separation shell and used for driving the oil-gas separation shell to rotate; the oil-gas separation shell is installed in the box shell, and the oil-gas separation shell and the box shell are matched to define an annular space surrounding the oil-gas separation shell. The oil-gas connector and the oil return opening communicate with the annular space. Oil-gas separation is integrated on the auxiliary transmission gear box, an oil-gas separation device does not need to be independently arranged, the overall structure is compact, the size is small, energy consumption can be reduced, and operation cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission, and in particular to a multifunctional gas turbine auxiliary transmission gearbox and a gas turbine system. Background Art

[0002] During the operation of the engine, lubricating oil is transported to various parts of the engine to lubricate and cool them down, ensuring the normal operation of the internal parts of the engine. During the operation of the engine, the lubricating oil will gradually evaporate to form an oil-gas mixture due to pressure changes, high temperature, heat dissipation, etc. As the working time increases, the lubricating oil consumption is relatively large, which seriously affects the performance and life of the whole machine. In order to improve the performance of the product, an oil-gas separation structure is usually added to the gas outlet, so that the separated liquid lubricating oil returns to the engine body to lubricate the moving parts, and the separated gas enters the air filter to realize the recycling of oil and gas, thereby reducing oil loss.

[0003] The inventors found in their research that the prior art combustion engine system has at least the following disadvantages:

[0004] The auxiliary transmission gearbox and the oil-gas separation device are separately arranged, which occupies a large space, has high operating energy consumption and high cost. Summary of the invention

[0005] The objects of the present invention include, for example, providing a multifunctional gas turbine auxiliary gearbox and a gas turbine system, which can integrate oil and gas separation into the auxiliary gearbox without the need to set up a separate oil and gas separation device. The overall structure is compact and small in size, which can reduce energy consumption and operating costs.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a multifunctional combustion engine auxiliary transmission gearbox, comprising:

[0008] A casing, a lubricating oil pump connecting gear shaft and an oil-gas separation casing; an oil-gas interface and an oil return port are provided on the casing; the lubricating oil pump connecting gear shaft is rotatably matched with the casing, the first end of the lubricating oil pump connecting gear shaft is used to be connected to the input shaft of the lubricating oil pump, and the second end of the lubricating oil pump connecting gear shaft opposite to the first end is connected to the oil-gas separation casing for driving the oil-gas separation casing to rotate; the oil-gas separation casing is installed in the casing, and the two cooperate to define an annular space arranged around the oil-gas separation casing; the oil-gas interface and the oil return port are both connected to the annular space.

[0009] In an optional embodiment, the oil-gas separation shell includes an outer shell, a rib plate and an inner shell, the inner shell is embedded in the outer shell, and the rib plate is connected to the outer shell and the inner shell at the same time; the inner shell is connected to the lubricating oil pump connecting gear shaft; the outer shell and the box shell cooperate to define the annular space.

[0010] Based on the above scheme, the outer shell can be set as a thin-walled part with light weight. Ribs are set in the outer shell to strengthen the structural strength of the outer shell. The outer shell is not easy to be deformed or damaged during use and has a long service life. At the same time, the volume of the inner shell is small, and the wall thickness can be set to be greater than the wall thickness of the outer shell, which is not easy to deform. The inner shell is used to cooperate with the gear shaft connected to the lubricating oil pump, and the installation is firm and reliable.

[0011] In an optional embodiment, the oil-gas separation housing further comprises a spline shaft, the inner housing is fixedly connected to the spline shaft, and the spline shaft is plug-fitted to the lubricating oil pump connecting gear shaft.

[0012] Based on the above scheme, the spline shaft is connected to the gear shaft of the lubricating oil pump through plug-in cooperation, and the assembly method is simple and reliable with high assembly efficiency.

[0013] In an optional embodiment, an annular protrusion is provided on the outer circumferential surface of the outer shell, and a distance is provided between the outer circumferential surface of the annular protrusion and the inner wall surface of the box shell.

[0014] Based on the above solution, the outer shell can be a split structure and is welded and fixed at the annular protrusion. The annular protrusion can increase the welding area, thereby improving the structural firmness of the outer shell.

[0015] In an optional embodiment, the box shell includes an installation box, an oil-gas separation box and an air sealing cover plate connected in sequence; the lubricating oil pump connecting gear shaft is rotatably matched with the installation box; the oil-gas separation shell is installed in the oil-gas separation box, and the side wall of the oil-gas separation box away from the first end is provided with an assembly opening, and the oil-gas interface and the oil return port are both provided on the oil-gas separation box; the air sealing cover plate closes the assembly opening; the air sealing cover plate abuts against the outer shell to limit the movement of the oil-gas separation shell in a direction away from the first end.

[0016] Based on the above scheme, by setting the box shell as a split structure, the installation box, oil and gas separation box and gas sealing cover plate can be independently processed and then assembled, which reduces the difficulty of processing and manufacturing, improves processing and manufacturing efficiency, and reduces processing and manufacturing costs.

[0017] In an optional embodiment, the air-sealing cover plate is provided with an assembly hole; the outer shell includes a connected drum-shaped portion and a neck portion, the neck portion is located on the side of the drum-shaped portion away from the first end, the neck portion is passed through the assembly hole, the outer peripheral surface of the drum-shaped portion abuts against the air-sealing cover plate, and a sealing structure is provided between the neck portion and the assembly hole.

[0018] Based on the above solution, by setting the assembly hole, the neck portion of the outer shell can be inserted into the assembly hole, so that the external device and the outer shell can be matched through the assembly hole to meet the needs of different scenarios. In addition, since the outer shell has a drum-shaped portion, when the oil-gas mixture contacts the drum-shaped portion, the oil can move away from the location of the sealing structure under the guidance of the drum-shaped portion, reducing the load at the location of the sealing structure, reducing the oil pressure at the location of the sealing structure, and reducing the probability of oil leakage.

[0019] In an optional embodiment, the sealing structure includes an annular sealing tooth provided on the outer peripheral surface of the neck portion and a wear-resistant sealing ring provided on the hole wall of the assembly hole, and the annular sealing tooth is in contact with the wear-resistant sealing ring.

[0020] Based on the above scheme, the sealing structure is simple in design, and through the cooperation of the wear-resistant sealing ring and the annular sealing teeth, the sealing effect is good and the probability of oil leakage is low.

[0021] In an optional embodiment, an air sealing interface is provided on the air sealing cover plate, and the air sealing interface is located on a side of the wear-resistant sealing ring away from the first end.

[0022] Based on the above scheme, external gas can be introduced into the gas seal interface to form positive pressure outside the sealing structure, further reducing the probability of oil leakage.

[0023] In an optional embodiment, the drum-shaped portion includes a middle tube and two conical tubes connected to both sides of the middle tube, and the diameter of the outer circumferential surface of the conical tube close to the air sealing cover plate gradually decreases in the direction from the first end to the second end; the outer circumferential surface of the conical tube close to the air sealing cover plate of the two conical tubes is provided with an annular step; the neck portion is connected to the conical tube and is located on the side of the annular step away from the first end.

[0024] Based on the above scheme, when the oil-gas mixture contacts the conical cylinder on the drum-shaped part, the oil-gas mixture moves toward the middle position of the outer shell under the guidance of the conical cylinder, so that the lubricating oil on both sides is concentrated and thrown onto the inner wall surface of the oil-gas separation box under the action of centrifugal force. The position of the lubricating oil on the oil-gas separation box is more concentrated. After the oil is concentrated, it can form a fluid with better fluidity. It can quickly enter the oil return port for recycling under the action of gravity. The oil return efficiency is high, and the lubricating oil can be replenished to the oil tank in time, thereby improving the lubrication effect of internal transmission parts during the operation of the gearbox.

[0025] In a second aspect, the present invention provides a combustion engine system, the combustion engine system comprising:

[0026] A multifunctional gas turbine auxiliary transmission gearbox as described in any of the aforementioned embodiments.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] In summary, the multifunctional gas engine auxiliary transmission gearbox provided in this embodiment is achieved by installing the oil-gas separation shell in the housing and connecting it to the lubricating oil pump connecting gear shaft. After the lubricating oil pump connecting gear shaft cooperates with the lubricating oil pump, the lubricating oil pump connecting gear shaft can transmit torque to the lubricating oil pump and the oil-gas separation shell under the power of the gas engine. During the rotation of the oil-gas separation shell, the oil-gas mixture entering from the oil-gas interface is located in the annular space. Part of the oil mist contacts the inner wall of the housing to form oil liquid, which falls under the housing under the action of gravity and returns to the oil tank from the oil return port below. Most of the oil-gas mixture contacts the outer peripheral surface of the oil-gas separation shell. Under the action of the centrifugal force generated during the rotation of the oil-gas separation shell, the oil generates a certain speed to leave the oil-gas separation shell, thereby realizing the separation of oil and gas. After leaving the oil-gas separation shell, the oil is blocked by the inner wall of the housing, and falls under the housing under its own gravity, and enters the oil tank from the oil return port. In this way, the auxiliary transmission gearbox is integrated with the oil-gas separation function. The oil-gas separation shell is connected to the gear shaft through the lubricating oil pump to transmit torque. No additional transmission structure or power source is required, which simplifies the structure, reduces operating energy consumption, and reduces operating costs. The overall structure is compact and small in size, which is conducive to lightweight and miniaturized design and meets the use requirements of aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of a multifunctional gas turbine auxiliary transmission gearbox according to an embodiment of the present application;

[0031] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0032] Figure 3 Schematic diagram of an oil-gas separation shell according to an embodiment of the present application.

[0033] icon:

[0034] 001-annular space; 002-gas seal area; 100-housing; 101-oil and gas interface; 102-oil return port; 103-gas seal interface; 110-installation box; 120-oil and gas separation box; 130-gas seal cover plate; 140-conical plate; 200-lubricating oil pump connecting gear shaft; 300-oil and gas separation shell; 310-outer shell; 311-drum-shaped part; 3111-middle cylinder; 3112-first cylinder; 3113-second cylinder; 3114-annular step; 312-narrow neck; 313-annular sealing teeth; 320-rib plate; 330-inner shell; 340-spline shaft; 400-wear-resistant sealing ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] In the prior art, in order to improve the utilization rate of lubricating oil, it is necessary to configure an oil-gas separation device for the gas engine separately. In order to obtain the torque of the gas engine, the oil-gas separation device needs to be additionally provided with a transmission structure, and the torque is transmitted to the oil-gas separation device by the transmission structure, resulting in a complex structure and high energy consumption. In addition, the oil-gas separation device is independently designed, has a large volume, occupies a large space, and is not conducive to miniaturization design.

[0042] In view of this, the designer provides a multifunctional gas turbine auxiliary transmission gearbox, which has a compact structure, small size, low operating cost, and is conducive to lightweight and miniaturized design.

[0043] Please combine Figure 1-Figure 3 In this embodiment, the multifunctional gas turbine auxiliary transmission gearbox includes a casing 100, a lubricating oil pump connecting gear shaft 200 and an oil-gas separation casing 300. The casing 100 is provided with an oil-gas interface 101 and an oil return port 102; the lubricating oil pump connecting gear shaft 200 is rotatably matched with the casing 100, the first end of the lubricating oil pump connecting gear shaft 200 is used to be connected to the input shaft of the lubricating oil pump, and the second end of the lubricating oil pump connecting gear shaft 200 opposite to the first end is connected to the oil-gas separation casing 300, which is used to drive the oil-gas separation casing 300 to rotate; the oil-gas separation casing 300 is installed in the casing 100, and the two cooperate to define an annular space 001 arranged around the oil-gas separation casing 300; the oil-gas interface 101 and the oil return port 102 are both connected to the annular space 001.

[0044] As mentioned above, the working principle of the multifunctional gas turbine auxiliary transmission gearbox provided in this embodiment is as follows:

[0045] The oil-gas separation shell 300 is installed in the casing 100 and is connected to the lubricating oil pump connecting gear shaft 200. After the lubricating oil pump connecting gear shaft 200 cooperates with the lubricating oil pump, the lubricating oil pump connecting gear shaft 200 can transmit torque to the lubricating oil pump and the oil-gas separation shell 300 under the power of the fuel engine. During the rotation of the oil-gas separation shell 300, the oil-gas mixture entering from the oil-gas interface 101 is located in the annular space 001, and part of the oil mist contacts the inner wall of the casing 100 to form oil liquid, which falls to the bottom of the casing 100 under the action of gravity and returns to the oil tank from the oil return port 102 below. Most of the oil-gas mixture contacts the outer peripheral surface of the oil-gas separation shell 300. Under the action of the centrifugal force generated during the rotation of the oil-gas separation shell 300, the oil leaves the oil-gas separation shell 300 at a certain speed to achieve the separation of oil and gas. After leaving the oil-gas separation shell 300, the oil is blocked by the inner wall of the housing 100 and falls under the housing 100 under its own gravity, and enters the oil tank from the oil return port 102. In this way, the auxiliary transmission gearbox is integrated with the oil-gas separation function. The oil-gas separation shell 300 is connected to the gear shaft 200 to transmit torque through the lubricating oil pump. There is no need to set up an additional transmission structure or an additional power source, which simplifies the structure, reduces operating energy consumption, and reduces operating costs. The overall structure is compact and small in size, which is conducive to lightweight and miniaturized design and meets the use requirements of aircraft.

[0046] The following embodiments illustrate the details of the multifunctional gas turbine auxiliary transmission gearbox of the present application by way of examples.

[0047] Please combine Figure 2 and Figure 3 In this embodiment, optionally, the oil-gas separation housing 300 includes an outer housing 310, a rib plate 320 and an inner housing 330. The outer housing 310 is configured as a thin-walled member, the inner housing 330 is embedded in the outer housing 310, and the rib plate 320 is located between the outer housing 310 and the inner housing 330 and is simultaneously connected to the outer housing 310 and the inner housing 330. The inner housing 330 is connected to the lubricating oil pump connecting gear shaft 200. The outer housing 310 cooperates with the box shell 100 to define an annular space 001.

[0048] It should be understood that the outer shell 310 can be set as a thin-walled part with light weight. Ribs 320 are set inside the outer shell 310 to strengthen the structural strength of the outer shell 310. The outer shell 310 is not easy to be deformed or damaged during use, and has a long service life. At the same time, the volume of the inner shell 330 is small, and the wall thickness can be set to be greater than the wall thickness of the outer shell 310, which is not easy to deform. The inner shell 330 is used to cooperate with the gear shaft 200 of the lubricating oil pump, and the installation is firm and reliable.

[0049] In order to improve the structural strength of the outer shell 310 , a plurality of ribs 320 may be provided between the outer shell 310 and the inner shell 330 , and the plurality of ribs 320 are evenly spaced and arranged around the axis of the inner shell 330 and the outer shell 310 .

[0050] In order to facilitate the connection between the oil-gas separation housing 300 and the lubricating oil pump connecting gear shaft 200, the oil-gas separation housing 300 also includes a spline shaft 340, the inner housing 330 is fixedly connected to the spline shaft 340, and the spline shaft 340 is plugged into the lubricating oil pump connecting gear shaft 200. Specifically, the spline shaft 340 includes a connecting disk and a shaft body of an integrated structure, the connecting disk is a circular disk, and the connecting disk and the shaft body are designed as an integrated structure. The connecting disk is fixedly connected to the inner housing 330 through structural parts such as bolts. The outer peripheral surface of the shaft body is provided with an external spline, and the shaft body is plugged into the lubricating oil pump connecting gear shaft 200, that is, the second end of the lubricating oil pump connecting gear shaft 200 is provided with an internal spline hole, and the shaft body is plugged into the internal spline hole, and the shaft body and the lubricating oil pump connecting gear shaft 200 rotate synchronously to achieve torque transmission.

[0051] It should be understood that the spline shaft 340 is plugged into and matched with the lubricating oil pump connecting gear shaft 200, and the assembly method is simple and reliable, and the assembly efficiency is high.

[0052] Optionally, the outer shell 310 includes a connected drum-shaped portion 311 and a neck portion 312 , wherein the neck portion 312 is located at a side of the drum-shaped portion 311 away from the first end, and the neck portion 312 can be configured as an integral structure with the drum-shaped portion 311 .

[0053] Please combine Figure 3 Optionally, the drum-shaped portion 311 includes a middle tube 3111 and two tapered tubes connected to both sides of the middle tube 3111. For ease of description, the two tapered tubes are respectively a first tube 3112 and a second tube 3113. The outer circumferential surface diameter of the first tube 3112 gradually decreases from the first end to the second end, and the outer circumferential surface diameter of the second tube 3113 gradually increases from the first end to the second end. The outer circumferential surface of the first tube 3112 is provided with an annular step 3114. The neck portion 312 is connected to the tapered tube and is located on the side of the annular step 3114 away from the first end. It should be understood that the middle cylinder 3111 can be set as a split structure, including two cylindrical cylinders, and one end of the two cylindrical cylinders is butted and welded. In order to improve the welding quality, the end of each cylindrical cylinder is provided with an outward-turned folding edge, and the two folding edges are annular structures. The two folding edges are butted and welded to form an annular protrusion arranged around the axis of the middle cylinder 3111. The folding edge design can increase the butt area, thereby increasing the welding area and improving the welding stability. In addition, the conical cylinder can be set as an integral structure with the corresponding cylindrical cylinder. For example, the conical cylinder can be set as an integral structure with the corresponding cylindrical cylinder by stamping or the like, eliminating the connection gap and improving the overall structural strength.

[0054] It should be noted that when the oil-gas mixture contacts the conical cylinder on the drum-shaped portion 311, the oil-gas mixture moves toward the middle position of the outer shell 310 under the guidance of the conical cylinder, so that the lubricating oil on both sides is concentrated and thrown onto the inner wall surface of the oil-gas separation box 120 under the action of centrifugal force, and the lubricating oil is more concentrated on the oil-gas separation box 120. After the oil is concentrated, it can form a fluid with better fluidity, and can quickly enter the oil return port 102 for recycling under the action of gravity. The oil return efficiency is high, and the lubricating oil can be replenished to the oil tank in time, thereby improving the lubrication effect of the internal transmission parts during the operation of the gearbox. That is, when the oil contacts the first cylinder 3112, under the guidance of the conical surface of the first cylinder 3112, the oil is thrown toward the upper right, and when the oil contacts the second pass, under the guidance of the conical surface of the second pass, the oil is thrown toward the upper left, and the oil can be gathered in the middle position of the box shell 100. Furthermore, since there is an annular step 3114 between the neck portion 312 and the first tube 3112, even if part of the lubricating oil directly reaches the wall of the first tube 3112, due to the limitation of the annular step 3114, the lubricating oil is not easy to cross the annular step 3114 and move toward the neck portion 312, and is not easy to leak from the side of the neck portion 312, thereby improving the sealing performance.

[0055] Furthermore, two groups of annular sealing teeth 313 are provided on the neck portion 312 , and the two groups of annular sealing teeth 313 are arranged at intervals in the axial direction of the oil-gas separation shell 300 . It should be understood that the two groups of annular sealing teeth 313 can be integrally formed on the outer peripheral surface of the neck portion 312 , and have high strength.

[0056] It should be noted that the outer shell 310 is a rotating body, which is stable and reliable when rotating. In this way, the outer conical surface of the first tube 3112 and the outer conical surface of the second tube are both conical surfaces, and the outer peripheral surface of the middle tube 3111 is a cylindrical surface.

[0057] Please combine Figure 1 and Figure 2In this embodiment, optionally, the box shell 100 includes an installation box 110, an oil-gas separation box 120 and an air-sealing cover plate 130 connected in sequence. The lubricating oil pump connecting gear shaft 200 is rotatably matched with the installation box 110. The oil-gas separation shell 300 is installed in the oil-gas separation box 120, and the side wall of the oil-gas separation box 120 away from the first end is provided with an assembly opening, and the air-sealing cover plate 130 closes the assembly opening. The oil-gas interface 101 and the oil return port 102 are both provided on the oil-gas separation box 120. The air-sealing cover plate 130 is provided with an assembly hole and an air-sealing interface 103, and the neck portion 312 is penetrated in the assembly hole. The air-sealing cover plate 130 abuts against the connection position of the neck portion 312 and the first cylinder 3112 to limit the movement of the oil-gas separation shell 300 in the direction away from the first end. Alternatively, the gas-sealing cover plate 130 directly abuts against the outer side surface of the annular step 3114 on the first cylinder 3112, which can limit the axial position of the oil-gas separation shell 300. At the same time, two wear-resistant sealing rings 400 are arranged on the hole wall of the assembly hole, and the two wear-resistant sealing rings 400 are respectively fitted with two groups of annular sealing teeth 313. The wear-resistant sealing rings 400 and the annular sealing teeth 313 that cooperate with each other form a sealing structure. In this way, two sealing structures are formed between the gas-sealing cover plate 130 and the neck portion 312, which can increase the sealing between the gas-sealing cover plate 130 and the neck portion 312. In addition, the gas-sealing interface 103 is located between the two sealing structures, and a certain pressure of gas can be injected into the space formed between the two sealing structures to form a gas-sealing area 002.

[0058] It is worth noting that, since the outer shell 310 has a drum-shaped portion 311, when the oil-gas mixture contacts the outer conical surface of the first tube 3112 of the drum-shaped portion 311, the oil can move away from the sealing structure under the guidance of the drum-shaped portion 311, thereby reducing the load at the sealing structure, reducing the oil pressure at the sealing structure, and reducing the probability of oil leakage. Even if some of the lubricating oil passes over the inner sealing structure, due to the design of the air seal interface 103, a certain positive pressure can be formed between the two sealing structures by injecting a certain pressure of gas from an external air source, thereby hindering the movement of the lubricating oil toward the outer sealing structure, and reducing the sealing pressure of the outer sealing structure, thereby reducing the probability of lubricating oil leakage.

[0059] Furthermore, a conical plate 140 may be provided on the inner wall surface of the oil-gas separation box 120 at a position corresponding to the second cylinder 3113, which can effectively block the lubricating oil liquid moving under the action of centrifugal force and improve the recovery efficiency of the lubricating oil liquid.

[0060] The multifunctional combustion engine auxiliary transmission gearbox provided in this embodiment is in operation, and the torque input by the lubricating oil pump connected to the gear shaft 200 is transmitted to the spline shaft 340, driving the inner shell 330 and the outer shell 310 to rotate together. The high-pressure oil-gas mixture is connected from the oil-gas interface 101, and the oil-gas mixture contacts the outer shell 310. Under the action of centrifugal force, the oil moves away from the outer shell 310 at a certain speed to achieve separation from the gas. After leaving the outer shell 310, the oil contacts the inner wall of the oil-gas separation box 120. Since the oil moves in the middle of the oil-gas separation box 120 under the action of the two conical cylinders, the oil can quickly gather and fall into the oil return port 102 under the action of gravity, thereby realizing oil collection and improving the utilization rate of the oil. Under the guidance of the first cylinder 3112, the oil-gas mixture moves away from the gas seal cover plate 130, reducing the amount of oil between the gas seal cover plate 130 and the neck 312, and reducing the probability of oil leakage.

[0061] This embodiment also provides a gas turbine system, which includes a multifunctional gas turbine auxiliary transmission gearbox, and has at least the advantages of compact structure, small size, and low operating cost.

[0062] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multifunctional gas turbine auxiliary transmission gearbox, characterized in that: include: A casing (100), a lubricating oil pump connecting gear shaft (200) and an oil-gas separation casing (300); the casing (100) is provided with an oil-gas interface (101) and an oil return port (102); the lubricating oil pump connecting gear shaft (200) and the casing (100) are rotatably matched, the first end of the lubricating oil pump connecting gear shaft (200) is used to be connected to the input shaft of the lubricating oil pump, and the second end of the lubricating oil pump connecting gear shaft (200) opposite to the first end is connected to the oil-gas separation casing (300) to drive the oil-gas separation casing (300) to rotate; the oil-gas separation casing (300) is installed in the casing (100), and the two cooperate to define an annular space (001) arranged around the oil-gas separation casing (300); the oil-gas interface (101) and the oil return port (102) are both connected to the annular space (001).

2. The multifunctional gas turbine auxiliary transmission gearbox according to claim 1 is characterized in that: The oil-gas separation housing (300) comprises an outer housing (310), a rib plate (320) and an inner housing (330); the inner housing (330) is embedded in the outer housing (310); the rib plate (320) is connected to the outer housing (310) and the inner housing (330) at the same time; the inner housing (330) is connected to the lubricating oil pump connecting gear shaft (200); the outer housing (310) cooperates with the casing (100) to define the annular space (001).

3. The multifunctional gas turbine auxiliary transmission gearbox according to claim 2 is characterized in that: The oil-gas separation housing (300) further comprises a spline shaft (340), the inner housing (330) is fixedly connected to the spline shaft (340), and the spline shaft (340) is plug-fitted to the lubricating oil pump connecting gear shaft (200).

4. The multifunctional gas turbine auxiliary transmission gearbox according to claim 2 is characterized in that: An annular protrusion is provided on the outer circumferential surface of the outer shell (310), and a distance exists between the outer circumferential surface of the annular protrusion and the inner wall surface of the box shell (100).

5. The multifunctional gas turbine auxiliary transmission gearbox according to claim 2 is characterized in that: The box shell (100) comprises an installation box (110), an oil-gas separation box (120) and an air-sealing cover plate (130) which are connected in sequence; the lubricating oil pump connecting gear shaft (200) is rotatably matched with the installation box (110); the oil-gas separation shell (300) is installed in the oil-gas separation box (120); a side wall of the oil-gas separation box (120) away from the first end is provided with an assembly opening; the oil-gas interface (101) and the oil return port (102) are both provided on the oil-gas separation box (120); the air-sealing cover plate (130) closes the assembly opening; the air-sealing cover plate (130) abuts against the outer shell (310) to limit the oil-gas separation shell (300) from moving in a direction away from the first end.

6. The multifunctional gas turbine auxiliary transmission gearbox according to claim 5, characterized in that: The air-sealing cover plate (130) is provided with an assembly hole; the outer shell (310) comprises a connected drum-shaped portion (311) and a neck portion (312); the neck portion (312) is located on a side of the drum-shaped portion (311) away from the first end; the neck portion (312) is passed through the assembly hole; the outer peripheral surface of the drum-shaped portion (311) is in contact with the air-sealing cover plate (130); and a sealing structure is provided between the neck portion (312) and the assembly hole.

7. The multifunctional gas turbine auxiliary transmission gearbox according to claim 6, characterized in that: The sealing structure comprises an annular sealing tooth (313) arranged on the outer peripheral surface of the neck portion (312) and a wear-resistant sealing ring (400) arranged on the hole wall of the assembly hole, and the annular sealing tooth (313) is in contact with the wear-resistant sealing ring (400).

8. The multifunctional gas turbine auxiliary transmission gearbox according to claim 7 is characterized in that: The gas sealing cover plate (130) is provided with a gas sealing interface (103), and the gas sealing interface (103) is located on a side of the wear-resistant sealing ring (400) away from the first end.

9. The multifunctional gas turbine auxiliary transmission gearbox according to claim 6, characterized in that: The drum-shaped portion (311) includes a middle tube (3111) and two conical tubes connected to both sides of the middle tube (3111), and the outer peripheral surface diameter of the conical tube close to the air-sealing cover plate (130) gradually decreases in the direction from the first end to the second end; the outer peripheral surface of the conical tube close to the air-sealing cover plate (130) of the two conical tubes is provided with an annular step (3114); the neck portion (312) is connected to the conical tube and is located on the side of the annular step (3114) away from the first end.

10. A combustion engine system, characterized in that: The combustion engine system comprises: The multifunctional gas turbine auxiliary transmission gearbox according to any one of claims 1 to 9.

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