A transmission case and a propeller fan test device

Abstract

The application and the technical field of the variable pitch fan wind test device are specifically disclosed as a transmission case, which comprises at least two sub-chambers connected with each other, the sub-chambers comprise a first sub-chamber and a second sub-chamber, at least one first bearing mounting seat is integrally arranged on the lower part of the first sub-chamber, at least one second bearing mounting seat is integrally arranged on the second sub-chamber, the second bearing mounting seat is arranged on the upper part of the first sub-chamber, the first sub-chamber and the second sub-chamber are provided with first connecting structures at least on both ends, and the lower part of the first sub-chamber is provided with a second connecting structure. The device can be used for assembling multi-shaft connection transmission, and the transmission shafts have an included angle, bearing support needs to be provided at the shaft end connection, the bearings have position degree installation requirements, and the device is used for simplifying the installation steps of the whole device. The device is applied in the variable pitch fan test device, can reduce the design of the device installation interface, oil inlet, oil return and sealing air path interface, and reduce the number of seals and locking pieces.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of different transmission shaft positioning and mounting, and particularly relates to a transmission case and a paddle fan test device. BACKGROUND

[0002] In some devices, such as an engine or a paddle fan test device for a rotor shaft, mutual transmission between multiple shafts often occurs, the shaft lines of the multiple shafts are coplanar, and two shaft lines exist and are not parallel. The transmission precision and stability of the other shafts are both required to be high.

[0003] In the patent document (Chinese patent publication No. CN109357879A), a paddle fan test device and system are disclosed, and the upper case structure thereof includes a front case, a first transmission case, a support case, a second transmission case and a tail fairing case which are sequentially detachably connected. The first transmission case, the support case and the second transmission case are mainly used for mounting bearing mounting seats and supporting transmission shafts, and ensuring that the driving device stably drives the paddle fan. The first transmission case is used for mounting and positioning one end of one driving shaft, the second transmission case is used for mounting and positioning the other driving shaft, and the support case is used for mounting and positioning the rotor shaft.

[0004] When the existing paddle fan is mounted in the first transmission case, the support case and the second transmission case, the relative positions of the bearings on the bearing mounting seats in the three cases need to be adjusted, so as to ensure the coaxiality during mounting, so that the bevel gears on the rotor shaft can fully mesh with the bevel gears on the driving shaft, and the paddle fan can work reliably. However, it is difficult to ensure that the other bearings mounted on the rotor shaft are horizontal to the bearings mounted on the rotor shaft in the support case during adjustment. This is mainly because there are many bearings to be mounted, which leads to a large number of bearing mounting seats, a large amount of adjustment, a large variable mounting position of the bearing mounting seat, and a difficulty in coaxial setting of the bearing mounting seat. The first transmission case, the support case and the second transmission case need to be repeatedly debugged during assembly to ensure the concentricity between the mounting interfaces of the cases, and the assembly difficulty is high. In addition, a lubricating oil passage needs to be connected at the meshing position of the bevel gears and the bearing mounting position for lubricating the bearings and the bevel gears during transmission. A detection element also needs to be introduced to detect the related performance of the test piece at this position. The existing lubricating oil passage is connected with the line of the detection element on the case through a pipeline design. For example, the oil passage between the first transmission case, the support case and the second transmission case needs to be connected by using a sealing element. The installation interfaces, oil inlet, oil return and sealing air passage interfaces between the first transmission case, the support case and the second transmission case also need to be considered and designed, which increases the occupied space and requires the sealing design of each interface during design. The number of parts is large, and the assembly components lead to a large number of supporting parts, which indirectly increases the production difficulty.

[0005] In addition to the above assembly difficulty, the obvious problem will also exist in the transmission of the coplanar transmission or the transmission with a certain angle of the multi-stage rotor shaft or the multi-stage driving shaft. SUMMARY

[0006] The purpose of the present application is to provide a transmission case that can be used to assemble multi-shaft connection transmission, and the shafts connected to each other have an angle, the shaft end connection needs to provide bearing support, and the bearings have installation requirements for the position between each other, thereby simplifying the installation steps of the entire device.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A transmission case comprises at least two sub-cases connected to each other, wherein the sub-cases comprise a first sub-case and a second sub-case, the lower part of the first sub-case is integrally provided with at least one first bearing mounting seat, the upper part of the second sub-case is integrally provided with at least one second bearing mounting seat, the second bearing mounting seat is arranged on the upper part of the first sub-case, at least one of the first sub-case and the second sub-case is provided with a first connecting structure at both ends, and the lower part of the first sub-case is provided with a second connecting structure. The first bearing mounting seat is used to support and limit the driving shaft, the second bearing mounting seat is used to support and limit the rotor shaft, the first sub-case and the second sub-case are used to correspondingly connect the driving shaft and the transmission shaft to other housings, and oil paths and lines are arranged.

[0009] In a further scheme, adjacent sub-cases are locked to each other by detachable locking members embedded in the case walls of the sub-cases.

[0010] In a further scheme, the bearing mounting hole axes in the first bearing mounting seat and the second bearing mounting seat are located in the same plane, and the bearing mounting hole axes in the first bearing mounting seat and the second bearing mounting seat are perpendicular to each other.

[0011] In a further scheme, the first connecting structure comprises a threaded hole structure, and the second connecting structure comprises a threaded hole structure.

[0012] In a further scheme, the number of the first bearing mounting seats is four, two first bearing mounting seats form a group, the bearing mounting holes of the two first bearing mounting seats in each group are coaxial, and the axes of the two groups of first bearing mounting seats are parallel to each other.

[0013] In a further scheme, a positioning groove is arranged at the connection between the first sub-case and the second bearing mounting seat, and the positioning groove is gap-fitted with the lower part of the second bearing mounting seat.

[0014] In a further scheme, the upper part of the first sub-case and the second sub-case are combined to form a cylindrical shape, and one end of the lower part of the first sub-case is in the shape of a boat tip.

[0015] Further, a first oil inlet hole is arranged on the first sub-chamber wall, and a bottom of the first sub-chamber wall is provided with an oil return hole, and a threading channel is arranged on one side of the oil return hole.

[0016] The present application has the following advantages:

[0017] The first sub-chamber and the first bearing mounting seat are integrated, the second sub-chamber and the second bearing mounting seat are integrated, and the first sub-chamber and the second sub-chamber are detachably connected, so that the bearing hole installation position requirement of the bearing mounting seat and the installation requirement of the transmission member on the coplanar shaft system can be met.

[0018] Compared with the device with transmission angle and transmission precision requirements among multiple shafts in the related art, the transmission chamber is divided according to the positions of the corresponding shafts in the present application, and the support bearing mounting seat at the connection between the corresponding shafts is integrally designed, and the integrated design parts are limited to each other, and are detachably connected, so that the position degree requirement of the support bearing mounting seat before installation can be guaranteed, assembly is facilitated, the interface design of the device can be simplified, the number of parts can be reduced, and the design task amount can be reduced.

[0019] The present application further improves the integration degree by arranging the oil inlet hole and the oil return hole or the threading channel in the transmission chamber, so that the transmission chamber is more convenient to assemble.

[0020] Another object of the present application is to provide a propeller fan test device comprising the transmission chamber.

[0021] In a further aspect, the propeller fan is a contra-rotating propeller fan, and the number of sub-chambers is two, i.e., the first sub-chamber and the second sub-chamber.

[0022] The transmission chamber is integrally designed and processed, and the assembly difficulty is lower than that of the three-chamber or multi-chamber assembly scheme, the transmission chamber structure and the connected bearing mounting seat are integrally designed, no repeated adjustment and concentric assembly are required, assembly is relatively simple, the interface design in the three-chamber assembly scheme in the related art is not required during design, the number of parts of the entire propeller fan test device can be reduced, and the production cycle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a propulsion-type coaxial counter-rotating propeller fan test device according to an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of a transmission housing according to an embodiment of the present invention;

[0026] Figure 3 This is a front view schematic diagram of a transmission housing according to an embodiment of the present invention;

[0027] Figure 4 This is a top view schematic diagram of a transmission housing according to an embodiment of the present invention;

[0028] Figure 5 This is a right-side schematic diagram of a transmission housing according to an embodiment of the present invention;

[0029] Figure 6 This is a left-side view of a transmission housing according to an embodiment of the present invention.

[0030] In the diagram: 1. First sub-casing; 2. Second sub-casing; 3. First bearing mounting seat; 4. Second bearing mounting seat; 5. First connecting structure; 6. Second connecting structure; 7. First oil inlet; 8. Oil return hole; 9. Threading channel; 10. Second oil inlet; 11. Counter-rotating rotor shaft; 12. Dual drive shaft; 13. Outer shaft bevel gear transmission housing; 14. Tail rectifier housing; 15. Bevel gear set; 16. Screw hole. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 2 and Figure 3 As shown, a transmission housing includes two interconnected sub-casings, namely a first sub-casing 1 and a second sub-casing 2, as... Figure 4 As shown, the first sub-casing 1 is integrally provided with two first bearing mounting seats 3, as follows: Figure 5As shown, a second bearing mounting seat 4 is integrally provided on the second sub-casing 2. The second bearing mounting seat 4 is located on the upper part of the first sub-casing 1, as shown. Figure 5 and Figure 6 As shown, at least one of the first compartment 1 and the second compartment 2 is provided with a first connecting structure 5 at both ends, such as... Figure 4 As shown, the lower part of the first compartment 1 is provided with a second connecting structure 6.

[0033] See Figures 2 to 6 As shown, its working principle or usage method is as follows: When installing the rotor shaft and drive shaft bearings of the counter-rotating propeller test device, bearings are installed in the second bearing mounting seat 4 to support the rotor shaft, and bearings are installed in the first bearing mounting seat 3 to support the drive shaft. The first connecting structure 5 is used to connect the remaining housings on the rotor shaft, and the second connecting structure 6 is used to connect the remaining housings enclosing the drive shaft. The drive shaft and rotor shaft are driven by gear assemblies meshing on both, driving the workpiece on the rotor shaft to rotate. Since the axes of the drive shaft and rotor shaft are generally coplanar or have an included angle between them, it is not easy to meet the included angle or coplanar requirements during assembly. By integrally setting the bearing mounting seats that meet the above requirements on the corresponding sub-casings, such as the first sub-casing or the second sub-casing, while ensuring the disassembly between the sub-casings, it is easy to adjust the position of other components on the drive shaft or rotor shaft, such as the bevel gear assembly, during assembly. During assembly, since the two first bearing mounting seats 3 in the first sub-casing 1 are integrally set, the installation of the two first bearings can be ensured through precision machining. Regarding the requirements for the angle and coplanarity of the bearing hole axis in seat 3, when connecting the first sub-box 1 and the second sub-box 2, in order to ensure that the axis of the bearing hole in the first bearing mounting seat 3 and the axis of the bearing hole in the second bearing mounting seat have the requirements of coplanarity and perpendicular angle, and since the second sub-box 2 is integrally provided with a second bearing mounting seat 4, it is only necessary to ensure that the axis of the bearing hole in the second bearing mounting seat 4 is coaxial with the central axis of the first sub-box. This coaxiality can be achieved by limiting the assembly through the clearance fit of the connection part between the two or by aligning the limiting structure of the connection part of the first sub-box 1 and the second sub-box 2. Compared with the assembly of the first transmission housing, support housing and second transmission housing in the prior art, it is difficult to adjust the positional requirements of the bearing holes in the three parts during installation. This can increase the assembly efficiency, reduce the design of the installation interface, oil inlet, oil return and sealing air interface, and reduce the number of connecting parts and seals that need to be assembled. When installing the entire transmission housing of the present invention, it can be connected to the corresponding housing through the first connecting structure 5 and the second connecting structure 6.

[0034] The person skilled in the art can think that the number of the sub-cabinets can also be greater than two, such as adding a sub-cabinet that is not integrally arranged with the first bearing seat on the first sub-cabinet for mounting future improved parts, or adding a sub-cabinet that is not integrally arranged with the second bearing seat on the second sub-cabinet for mounting future improved parts, which can also achieve the mounting of the driving shaft and the one-end bearing of the rotor shaft.

[0035] The person skilled in the art can think that in the case of coplanar transmission or transmission with a certain angle of the multi-stage rotor shaft or the multi-stage driving shaft, the transmission cabinet can also include multiple sub-cabinets for supporting the extra rotor shaft or driving shaft, or the first bearing seat and the second bearing seat in the required number can be integrally arranged on the first sub-cabinet and the second sub-cabinet, respectively, for supporting the extra rotor shaft or driving shaft. The working principle is similar to the above, which will not be described here.

[0036] According to the working principle, some preferred embodiments or structures are provided, and the adjacent sub-cabinets are locked by the detachable locking members embedded in the cabinet wall of the sub-cabinet. The locking member here can be a bolt, which is screwed into the cabinet wall to connect the sub-cabinets. It can also be a structure similar to a bolt, which has the same effect.

[0037] The axis of the bearing mounting hole in the first bearing seat 3 and the second bearing seat 4 is located in the same plane, and the axis of the bearing mounting hole in the first bearing seat 3 is perpendicular to the axis of the bearing mounting hole in the second bearing seat 4. The effect of the driving shaft driving the rotor shaft is optimal, and the person skilled in the art can think that there is a certain error in processing and manufacturing, so as long as the installation or processing error of the above axis is within a reasonable range, it can also be considered to achieve a positive effect, which should also be covered in the implementation range of the present application.

[0038] As shown in Figure 4 and Figure 6 The first connecting structure 5 includes a threaded hole structure, and the second connecting structure 6 includes a threaded hole structure. The threaded hole is connected with a bolt, and the rest of the cabinet shell or structure on the paddle fan test device, such as the front cabinet, the tail fairing cabinet and the support frame, is connected, so as to fix the entire transmission cabinet. The person skilled in the art should be able to think that the first connecting structure 5 and the second connecting structure 6 here can also be a connecting hole body similar to a threaded hole, which is locked on the rest of the cabinet shell by a bolt or other structure,

[0039] The number of the first bearing seat 3 is four, and two first bearing seats 3 form a group. The bearing mounting holes of the two first bearing seats 3 in each group are coaxial, and the axes of the two groups of first bearing seats 3 are parallel to each other. In this way, the shaft end of the driving shaft can be further positioned.

[0040] The connecting part of the first sub-chamber 1 and the second bearing mounting seat 4 is provided with a positioning groove, which is in clearance fit with the lower part of the second bearing mounting seat 4. Such a first sub-chamber can not only define the position of the first bearing mounting seat 3 therein, but also can define the position of the second bearing mounting seat 4, which is more convenient for the connection of the first sub-chamber 1 and the second sub-chamber 2.

[0041] The upper part of the first sub-chamber 1 is cylindrical after being combined with the second sub-chamber 2, and the lower end of the first sub-chamber 1 is in the shape of a boat tip. The boat tip is provided to reduce the resistance in the wind test, which is convenient for fluid analysis of the related position of the lower part of the first sub-chamber 1 in the propeller fan test.

[0042] As shown in Figure 5 , the chamber wall of the first sub-chamber 1 is provided with a first oil inlet hole 7 for lubricating the bearing in the first bearing mounting seat 3, as shown in Figure 4 , the bottom of the chamber wall of the first sub-chamber 1 is provided with an oil return hole 8, one side of which is provided with a threading channel 9; the chamber wall of the second sub-chamber 2 is provided with a second oil inlet hole 10 for lubricating the bearing in the second bearing mounting seat 4 and lubricating the transmission gear on the shaft in the transmission chamber. In this way, the transmission of the transmission chamber is more stable, the integration is higher, and the assembly is more convenient.

[0043] According to the above-mentioned implementation structure or invention concept, it is obvious that we can also obtain a propeller fan test device comprising the above-mentioned transmission chamber.

[0044] Preferably, as shown in Figure 1 , the propeller fan is a contra-rotating propeller fan, and the number of sub-chambers is two, which are the first sub-chamber 1 and the second sub-chamber 2.

[0045] Specifically, as shown in Figure 1 , the propeller fan test device in this embodiment can be a propelling coaxial contra-rotating propeller fan test device, which comprises contra-rotating rotor shafts 11, double drive shafts 12, outer shaft bevel gear transmission chamber 13, tail fairing chamber 14 and bevel gear sets 15. The contra-rotating rotor shafts 11 and the double drive shafts 12 are driven through the two bevel gear sets 15 thereon. The outer shaft bevel gear transmission chamber 13, the transmission chamber, the tail fairing chamber 14 are respectively connected and support the contra-rotating rotor shafts 11, the double drive shafts 12, the bevel gear sets 15 and other detection parts needed in the test. The installation position of the transmission chamber is as shown in Figure 1As shown, the functions of the transmission case mainly include: 1. providing support structure for two driving bevel gears and one driven bevel gear of the bevel gear set 15 of the test device, ensuring that the power of two vertical double drive shafts 12 can be transmitted to two horizontal, coaxial and counter-rotating driven bevel gears, so as to ensure that the two coaxial counter-rotating rotors of the test device can obtain power input; 2. providing oil supply channel for the bearings supporting the bevel gear set 15 installed in the transmission case; 3. providing oil supply channel for the two bevel gear sets 15 of the test device; 4. providing sealing air channel for the driving bevel gears of the two bevel gear sets 15; 5. providing oil supply channel for the test section of the test device; 6. providing interface for the oil pump of the entire test device; 7. providing installation interface for the outer shaft bevel gear transmission case 13 and the tail fairing case 14 of the test device; 8. providing observation window for the test device; 9. providing wiring channel in the case body for the signal wiring of the test device.

[0046] Referring to Figures 2 to 6 As shown, the transmission case can be formed by opening the first case 1 and the second case 2 in an upper and lower manner on a cylinder, and two rows of screw holes 16 are designed at the connection between the first case 1 and the second case 2 to ensure the assembly of the first case 1 and the second case 2. The first case 1 and the second case 2 are integrally designed and processed with the first bearing mounting seat 3 and the second bearing mounting seat 4 in the case for supporting the bevel gear set 15, and the first case 1 is processed by numerical milling to ensure concentricity. A circle of bolt holes is designed on the front end face of the transmission case to mount the outer shaft bevel gear transmission case 13 of the test device on the transmission case, and a circle of bolt holes is designed on the rear end face of the transmission case to mount the tail fairing case 14 of the test device on the transmission case. During the test, two vertical and axis coplanar driving bevel gears are installed in the case, the driving bevel gears are connected with the double drive shafts 12, and the power of the motor is transmitted to the two horizontal, coaxial and counter-rotating counter-rotating rotor shafts 11 of the test device through two horizontal, coaxial and counter-rotating driven bevel gears. One of the driven bevel gears is also installed in the transmission case.

[0047] The first oil inlet hole 7 and the second oil inlet hole 10 are opened on the rear end face of the transmission case, and an oil channel is designed inside to lubricate the bearings and the bevel gear set in the case. A lead hole is designed at the bottom of the transmission case as a threading channel 9 to facilitate the lead wiring in the test device. Two oil return holes 8 are also designed at the bottom of the transmission case to pump away the accumulated oil in the oil cavity of the test device.

[0048] The transmission case structure of the propeller type counter-rotating propeller fan test device and the propeller type counter-rotating propeller fan test device can be easily manufactured, and the strength and vibration can also meet the evaluation of rotor dynamics.

[0049] Those skilled in the art should be able to think that the transmission case structure in the present application scheme can also be used for multi-stage propeller fan devices.

[0050] It should be noted that the terms "first", "second", and the like in the description of this application are used to distinguish similar objects, and do not necessarily have to be described in a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to describe the embodiments of the application described herein. In this application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings.

[0051] In the description of this specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The basic principles, main features and advantages of the application are shown and described above. Those skilled in the art should understand that the application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the application. Without departing from the spirit and scope of the application, various changes and improvements of the application can be made, and these changes and improvements all fall within the scope of the claimed application.

Claims

1. A transmission case characterized by, The device includes at least two interconnected compartments, including a first compartment (1) and a second compartment (2). The lower part of the first compartment (1) is integrally provided with at least one first bearing mounting seat (3), and the upper part of the second compartment (2) is integrally provided with at least one second bearing mounting seat (4). The second bearing mounting seat (4) is located on the upper part of the first compartment (1). At least one of the first compartment (1) and the second compartment (2) is provided with a first connecting structure (5) at both ends. The lower part of the first compartment (1) is provided with a second connecting structure (6). The rotor shaft is supported by a bearing installed in the second bearing mounting (4), the drive shaft is supported by a bearing installed in the first bearing mounting (3), the first connecting structure (5) is used to connect the remaining casings on the rotor shaft, and the second connecting structure (6) is used to connect the remaining casings on the drive shaft.

2. A transmission tunnel according to claim 1, characterised in that The adjacent compartments are locked together by a detachable locking element embedded in the compartment wall.

3. The transmission tunnel according to claim 1, characterized in that The bearing mounting hole axes of the first bearing mounting seat (3) and the second bearing mounting seat (4) are located in the same plane, and the bearing mounting hole axis of the first bearing mounting seat (3) is perpendicular to the bearing mounting hole axis of the second bearing mounting seat (4).

4. The transmission tunnel according to claim 1, characterized in that The first connecting structure (5) includes a screw hole structure, and the second connecting structure (6) includes a screw hole structure.

5. The transmission tunnel according to claim 1, characterized in that, The number of the first bearing mounting seats (3) is four. Two first bearing mounting seats (3) form a group. The bearing mounting holes of the two first bearing mounting seats (3) in each group are coaxial, and the axes of the two groups of first bearing mounting seats (3) are parallel to each other.

6. A transmission tunnel according to claim 5, characterised in that A positioning groove is provided at the connection between the first sub-box (1) and the second bearing mounting seat (4), and the positioning groove is in clearance fit with the lower part of the second bearing mounting seat (4).

7. The transmission tunnel according to claim 1, characterized in that The upper part of the first compartment (1) is cylindrical when combined with the second compartment (2), and the lower end of the first compartment (1) is pointed.

8. The transmission tunnel according to claim 1, characterized in that The first sub-cassette (1) has a first oil inlet hole (7) on its casing wall, and an oil return hole (8) is provided at the bottom of the casing wall of the first sub-cassette (1). A wire passage (9) is provided on one side of the oil return hole (8); the second sub-cassette (2) has a second oil inlet hole (10) on its casing wall.

9. A propeller fan test apparatus characterised by Includes the transmission housing as described in any one of claims 1-8.

10. The paddle wheel test device of claim 9, wherein, The propeller is a counter-rotating propeller, and there are two sub-cassettes, namely the first sub-cassette (1) and the second sub-cassette (2).

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