Multi-station multi-specification flexible low-temperature high-speed bearing test device

Abstract

The invention discloses a multi-station multi-specification flexible low-temperature high-speed bearing test device, which is provided with multi-specification assembly spaces for a large bearing and a small bearing, has double functions of single-station and double-station tests, has two layouts of left and right bidirectional liquid feeding, and can be freely selected according to a bearing to be tested and test indexes. And the test device adopts a universal design on the overall structure, external interfaces are consistent, and the test device can be installed and tested in a plurality of different test systems. The technical problems of unified assembly of various specifications of bearings, test efficiency improvement and sharing of different test systems are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of low-temperature and high-speed bearing testing, in particular to a multi-station and multi-specification flexible low-temperature and high-speed bearing testing device. Background Art

[0002] The rotor of the liquid rocket engine turbopump is supported by bearings, which work under low temperature and high speed conditions. Low temperature bearing test is an important means to verify the low temperature operation performance of such bearings.

[0003] Liquid rocket engines are becoming more and more diverse, resulting in different sizes of test bearings and various test conditions, and the test efficiency needs to be continuously improved. Therefore, it is urgent to develop an efficient and flexible low-temperature bearing test device with fast response capabilities under different working conditions to achieve unified assembly of bearings of various specifications, improve test efficiency and share different test systems. Summary of the invention

[0004] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art and provide a multi-station, multi-specification, flexible, low-temperature, and high-speed bearing testing device, which can simultaneously meet the assembly requirements of bearings to be tested in various specifications, have single / dual-station testing capabilities, and have two-way liquid inlet capabilities.

[0005] The technical solution of the present invention is: a multi-station multi-specification flexible low-temperature high-speed bearing test device, including a base, a front transition sleeve, a rear transition sleeve, a front cover, an upper cover, a rotor and a loading mechanism; the base is a rectangular structure with a hollow inner cavity, and the front and rear of the base are respectively provided with a first through hole and a second through hole, which are directly connected to the inner cavity of the base, the first through hole is installed with the front transition sleeve, the front cover is installed on the front transition sleeve, and the base, the front transition sleeve and the front cover are tightly connected; the second through hole is installed with the rear transition sleeve, and the base and the rear transition sleeve are tightly connected; the upper cover is installed on the top of the base; the inner cavity of the base is filled with test medium, and two bearing mounting positions are provided for mounting two bearings to be tested or mounting one bearing to be tested and one accompanying test bearing to realize double-station testing or single-station testing; the rotor is installed in the bearing, and the loading mechanism is installed outside the base to apply load to the bearing to be tested.

[0006] Furthermore, a measuring point hole is respectively opened on the top and side of the front end of the base, and the two measuring point holes are located in different sections in the axial direction; a measuring point hole is also respectively opened on the top and side of the rear end of the base, and the two measuring point holes on the top are used for measuring the single-station test state, and the two measuring point holes on the side are used for measuring the double-station test state; the measuring point holes at the front and rear ends of the top of the base are not equidistant from the front and rear center dividing planes of the base, and the measuring point holes at the front and rear ends of the side of the base are equidistant from the front and rear center dividing planes of the base; a measuring point hole is also respectively opened in the vertical and horizontal directions of the front transition sleeve and the rear transition sleeve, and are aligned with the measuring point holes on the base after installation, so that the measuring point holes pass through to the inner cavity of the base.

[0007] Furthermore, a through hole is respectively provided on the left and right sides of the base and directly passes through the inner cavity of the base for introducing the test medium; the two holes have the same specifications, the centers are coaxial, and are symmetrical about the left and right middle planes of the base; the rear transition sleeve is a rotating body with a flange structure, and two through holes are radially provided on the circumference of the flange of the rear transition sleeve, and the two holes have the same specifications and are symmetrically arranged in the circumferential direction for introducing the test medium; the front cover is a cylindrical rotating body with a flange structure, and two through holes are radially provided on its cylindrical surface, and the two holes have the same specifications and are symmetrically arranged in the circumferential direction for introducing the test medium; after the base, the front cover, and the rear transition sleeve are assembled, the through holes for introducing the medium are all located in a horizontal position and are distributed on the left and right sides of the base.

[0008] Furthermore, in the single-station test state, the measuring point holes of the double-station test are blocked, and in the double-station test state, the measuring point holes of the single-station test are blocked; in the single-station test state or the double-station test state, the left or right liquid inlet is blocked, and a loading mechanism is installed on the blocked liquid inlet side, and a load is applied to the bearing to be tested, and the test is carried out using the left or right liquid inlet method.

[0009] Furthermore, the test device is a horizontal structure, and the rotor is placed horizontally.

[0010] Furthermore, the first through hole and the second through hole of the base are coaxially arranged cylindrical holes, and the axes are located on the left and right center dividing planes of the base, and the hole diameters are respectively consistent with the front transition sleeve and the rear transition sleeve; a plurality of bolt holes are evenly distributed circumferentially around the two cylindrical holes for connecting with the front transition sleeve and the rear transition sleeve; a plurality of anchor bolt holes are arranged on the bottom surface of the base for fixing the base; a plurality of threaded holes are evenly arranged on the top of the base for connecting with the upper cover.

[0011] Furthermore, the front transition sleeve is a rotating body with a flange structure, the outer diameter of the front transition sleeve is consistent with the first through hole of the base, and the inner diameter is consistent with the bearing to be tested.

[0012] Furthermore, the front transition sleeve and the rear transition sleeve are a series of parts with different inner diameters, which are selected according to the size of the bearing to be tested; and the inner diameter of the front transition sleeve is larger than that of the rear transition sleeve.

[0013] Furthermore, the upper cover is a rectangular flat plate with multiple through holes, and is fixed to the base by bolts; according to measurement requirements, a sensor installation hole is opened on the upper cover.

[0014] Furthermore, the test medium is liquid nitrogen.

[0015] The advantages of the present invention compared with the prior art are:

[0016] The multi-station multi-specification flexible low-temperature high-speed bearing test device designed by the present invention has assembly space for large and small bearings of various specifications, has the dual functions of single-station and double-station tests, and has two layouts of left and right two-way liquid inlet, which can be freely selected according to the bearing to be tested and the test indicators; and the test device adopts a universal design in the overall structure, with consistent external interfaces, and can be installed and tested in multiple different test systems. It effectively solves the technical problems of unified assembly of bearings of various specifications, improving test efficiency and sharing of different test systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the multi-station multi-specification flexible low-temperature high-speed bearing test device of the present invention;

[0018] Figure 2 It is the AA cross-sectional view of the test device of the present invention;

[0019] Figure 3 It is a schematic diagram of measuring points of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the front transition sleeve of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the rear transition sleeve of the present invention;

[0022] Figure 6 It is a schematic diagram of the liquid inlet of the present invention;

[0023] Figure 7 This is a schematic diagram of a single-station test state of the present invention;

[0024] Figure 8 This is a schematic diagram of the double-station test state of the present invention;

[0025] Fig. 9 It is a schematic diagram of the interchange of liquid inlet directions of the present invention. DETAILED DESCRIPTION

[0026] In order to better understand the technical solution of the present invention, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. Parts of each structure in the accompanying drawings will be described separately. It is worth noting that the elements not shown in the drawings or not described in words are in a form known to ordinary technicians in the relevant technical field. In the description of the embodiments herein, any reference to directions and orientations are only for the convenience of description and should not be construed as limitations on the scope of protection of the present invention. For example, terms such as "front end", "rear end", "circumferential", "axial", "radial", "left", and "right" indicating directions or positional relationships are based on the orientations, positional relationships, or conventions shown in the accompanying drawings. They are only for the convenience of describing the present invention, and are not specific, necessary, or unchangeable. They should not be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the disclosure of the present invention, and therefore cannot be construed as limitations on the present invention. For example, if the definition of the attached drawings Figure 1 The left end is the "front end", and the right end is naturally understood as the "rear end"; the following description of the preferred embodiment will involve a combination of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiment.

[0027] The flexible low-temperature bearing test device designed by the present invention is as follows: Figure 1 and Figure 2 As shown, it mainly includes a base 3, a front transition sleeve 2, a rear transition sleeve 5, a front cover 1, an upper cover 4, a rotor 6, a loading mechanism 14, a bearing to be tested 12, a bearing to be tested / accompanying test bearing 13, and a bearing sleeve 7, upper cover fixing bolts 8, rear transition sleeve fixing bolts 9, pins 10, and front cover fixing bolts 11.

[0028] The base 3 is a rectangular parallelepiped structure with a hollow inner cavity. The front and rear of the base 3 are provided with cylindrical holes, which are directly connected to the inner cavity of the base. The cylindrical hole in the front of the base is installed with the front transition sleeve 2, and the front cover 1 is installed on the front transition sleeve 2. The base 3, the front transition sleeve 2, and the front cover 1 are fastened by bolts; the cylindrical hole in the rear of the base is installed with the rear transition sleeve 5, and the base 3 and the rear transition sleeve 5 are fastened by bolts; the upper cover 4 is installed on the top of the base and fastened by bolts. In this way, a low-temperature bearing test device shell with a hollow interior is formed, and its inner cavity is installed with the bearing to be tested 12, the bearing to be tested / accompanying test bearing 13, and the rotor 6, and is filled with liquid nitrogen; the loading mechanism 14 is installed on the outside to apply load to the bearing to be tested.

[0029] The low-temperature and high-speed bearing test device is a horizontal structure, and the rotor 6 is placed horizontally.

[0030] The cylindrical holes at the front and rear of the base are coaxially arranged, and the axis is located on the left and right mid-planes of the base. The hole diameters are respectively consistent with the front transition sleeve and the rear transition sleeve; 6 to 10 bolt holes are evenly distributed circumferentially around the two cylindrical holes for connecting with the front transition sleeve and the rear transition sleeve; 4 anchor bolt holes are arranged on the bottom surface of the base 3 for fixing the base; multiple threaded holes are evenly arranged on the top of the base for connecting with the upper cover 4.

[0031] like Figure 3 As shown, a measuring point hole is respectively provided on the upper surface and the side surface of the front end of the base, and the two measuring point holes are axially located at different sections, and are respectively used for measuring the single-station and double-station test states. Similarly, a measuring point hole is respectively provided on the upper surface and the side surface of the rear end of the base. The measuring point holes on the upper surface of the front and rear ends of the base are not equidistant from the front and rear center dividing planes of the base, and the measuring point holes on the side surfaces of the front and rear ends of the base are equidistant from the front and rear center dividing planes of the base. A measuring point hole is respectively provided in the vertical and horizontal directions of the front transition sleeve and the rear transition sleeve, and the two measuring point holes are axially located at different sections, and are respectively used for measuring the single-station and double-station test states. After installation, they are aligned with the measuring point holes on the base so that the measuring point holes pass through to the inner cavity of the base.

[0032] like Figure 4 and Figure 5 As shown, the front transition sleeve 2 and the rear transition sleeve 5 are a series of parts with different inner diameters, which are selected according to the size of the bearing to be tested; and the inner diameter of the front transition sleeve 2 is larger than the inner diameter of the rear transition sleeve 5, so that the bearing to be tested can be easily loaded into the test device from front to back.

[0033] Specifically, the overall structure of the front transition sleeve 2 and the rear transition sleeve 5 is a rotating body with a flange structure. The outer diameter of the front transition sleeve 2 is consistent with the cylindrical hole in front of the base, and the inner diameter is consistent with the bearing to be tested; 6 to 10 through holes are arranged circumferentially on the flange. A threaded through hole is opened on the left and right sides of the base and directly passes through the inner cavity for the introduction of test media. The two threaded holes have the same specifications, coaxial centers, and are symmetrical about the left and right middle planes of the base. Two threaded through holes are opened radially on the circumference of the flange of the rear transition sleeve. The two threaded holes have the same specifications and are arranged symmetrically around the circumference for the introduction of test media. The overall structure of the front cover is a cylindrical rotating body with a flange structure. 6 to 10 through holes are arranged circumferentially on the flange; two threaded through holes are opened radially on the cylindrical surface. The two threaded holes have the same specifications and are arranged symmetrically around the circumference for the introduction of test media. After the base, front cover, and rear transition sleeve are assembled, the threaded holes used to introduce the medium are all located in a horizontal position, distributed on the left and right sides of the base, such as Figure 6 shown.

[0034] The overall structure of the upper cover 1 is a rectangular flat plate with multiple through holes, which is fixed to the base by bolts. According to the measurement requirements, sensor installation holes are opened on the upper cover.

[0035] Embodiment 1:

[0036] Base 3, front transition sleeve 2, rear transition sleeve 5 according to the attached Figure 1 After assembly, the test bearing 13 and the test bearing 12 are respectively installed at the front and rear ends of the rotor 6 and installed into the base together with the rotor. The test bearing 13 is installed at the single-station state rear end measuring point of the base, and the test bearing 12 is installed at the single-station state front end measuring point of the base. The specifications and models of the test bearing are different from those of the test bearing. Figure 1 Install the front cover 1, the upper cover 4, install the measuring sensor, block the measuring point hole in the double-station state, block the liquid inlet on one side, and install the loading mechanism 14 on the side of the blocked liquid inlet, thereby forming a single-station test device, see the attached Figure 7 , one assembly can test one set of products.

[0037] By replacing the front transition sleeve 2 and the rotor 6, the installation requirements of the test bearings of different specifications and sizes can be met, and the inner diameter of the test bearings covers φ25 to φ85 mm.

[0038] Embodiment 2:

[0039] Base 3, front transition sleeve 2, rear transition sleeve 5 according to the attached Figure 1 After assembly, the test bearings 12 and 13 are installed at the front and rear ends of the rotor 6 respectively and installed into the base together with the rotor. One set of the test bearings is installed at the rear end measuring point of the base in the double-station state, and the other set of the test bearings is installed at the front end measuring point of the base in the double-station state. The specifications and sizes of the two sets of test bearings are consistent. Figure 1 Install the front cover 1, the upper cover 4, install the measuring sensor, block the measuring point hole in the single-station state, block the liquid inlet on one side, and install the loading mechanism 14 on the liquid inlet side, thereby forming a double-station test device, see the attached Figure 8 , 2 sets of products can be tested in one assembly.

[0040] By replacing the front transition sleeve 2 and the rotor 6, the installation requirements of the test bearings of different specifications and sizes can be met, and the inner diameter of the test bearings covers φ25 to φ70 mm.

[0041] Embodiment 3:

[0042] Connect the left side liquid inlet of the test device to the existing liquid supply equipment of the 1# test system, block the right side liquid inlet of the test device, and use the "left liquid inlet" method to carry out the test. Similarly, when the test device is installed in the 2# test system, connect the right side liquid inlet to the existing liquid supply equipment, block the left side liquid inlet of the test device, and use the "right liquid inlet" method to carry out the test. See the attached Fig. 9 .

[0043] It is to be understood that the present invention is described by way of embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and embodiments that can fall within the scope of the claims of this application all fall within the scope protected by the present invention.

[0044] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A multi-station multi-specification flexible low-temperature high-speed bearing test device, characterized in that: The invention comprises a base (3), a front transition sleeve (2), a rear transition sleeve (5), a front cover (1), an upper cover (4), a rotor (6) and a loading mechanism (14); the base (3) is a rectangular parallelepiped structure with a hollow inner cavity, a first through hole and a second through hole are respectively provided on the front and rear of the base, which are directly connected to the inner cavity of the base; the front transition sleeve (2) is installed in the first through hole, the front cover (1) is installed on the front transition sleeve (2), and the base (3), the front transition sleeve (2) and the front cover (1) are tightly connected; the rear transition sleeve (5) is installed in the second through hole, and the base (3) and the rear transition sleeve (5) are tightly connected; the upper cover (4) is installed on the upper part of the base (3); the inner cavity of the base is filled with a test medium, and two bearing mounting positions are provided for mounting two bearings to be tested or mounting one bearing to be tested and one accompanying bearing to be tested, so as to realize a double-station test or a single-station test; the rotor (6) is installed in the bearing, and the loading mechanism (14) is installed outside the base to apply a load to the bearing to be tested.

2. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 1 is characterized in that: A measuring point hole is respectively provided on the top and side of the front end of the base, and the two measuring point holes are located in different sections in the axial direction; a measuring point hole is also respectively provided on the top and side of the rear end of the base, and the two measuring point holes on the top are used for measuring the single-station test state, and the two measuring point holes on the side are used for measuring the double-station test state; the measuring point holes at the front and rear ends of the top of the base are not equidistant from the front and rear center dividing planes of the base, and the measuring point holes at the front and rear ends of the side of the base are equidistant from the front and rear center dividing planes of the base; a measuring point hole is also respectively provided in the vertical and horizontal directions of the front transition sleeve and the rear transition sleeve, and after installation, they are aligned with the measuring point holes on the base so that the measuring point holes pass through to the inner cavity of the base.

3. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 2 is characterized in that: The base (3) has a through hole on its left and right sides respectively, which passes directly through the inner cavity of the base and is used to introduce the test medium. The two holes have the same specifications, are coaxial in center, and are symmetrical about the left and right middle planes of the base. The rear transition sleeve (5) is a rotating body with a flange structure, and two through holes are radially provided on the circumference of the flange of the rear transition sleeve. The two holes have the same specifications and are symmetrically arranged in the circumferential direction, and are used to introduce the test medium. The front cover (1) is a cylindrical rotating body with a flange structure, and two through holes are radially provided on its cylindrical surface. The two holes have the same specifications and are symmetrically arranged in the circumferential direction, and are used to introduce the test medium. After the base, the front cover, and the rear transition sleeve are assembled, the through holes for introducing the medium are all located in a horizontal position and are distributed on the left and right sides of the base.

4. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 3 is characterized in that: In the single-station test state, the measuring point hole of the double-station test is blocked, and in the double-station test state, the measuring point hole of the single-station test is blocked; in the single-station test state or the double-station test state, the left or right liquid inlet is blocked, and a loading mechanism (14) is installed on the blocked liquid inlet side to apply a load to the bearing to be tested, and the test is carried out using the left or right liquid inlet method.

5. The multi-station multi-specification flexible low-temperature high-speed bearing testing device according to claim 1 is characterized in that: The test device is a horizontal structure, and the rotor (6) is placed horizontally.

6. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 1 is characterized in that: The first through hole and the second through hole of the base (3) are coaxially arranged cylindrical holes, and the axes are located on the left and right mid-planes of the base, and the hole diameters are respectively consistent with the front transition sleeve and the rear transition sleeve; multiple bolt holes are evenly distributed around the periphery of the two cylindrical holes for connecting with the front transition sleeve and the rear transition sleeve; multiple anchor bolt holes are arranged on the bottom surface of the base (3) for fixing the base; multiple threaded holes are evenly arranged on the top of the base (3) for connecting with the upper cover (4).

7. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 1 is characterized in that: The front transition sleeve (2) is a rotating body with a flange structure. The outer diameter of the front transition sleeve (2) is consistent with the first through hole of the base, and the inner diameter is consistent with the bearing to be tested.

8. The multi-station multi-specification flexible low-temperature high-speed bearing testing device according to claim 1 is characterized in that: The front transition sleeve (2) and the rear transition sleeve (5) are a series of parts with different inner diameters, which are selected according to the size of the bearing to be tested; and the inner diameter of the front transition sleeve (2) is larger than the inner diameter of the rear transition sleeve (5).

9. The multi-station multi-specification flexible low-temperature high-speed bearing test device according to claim 1 is characterized in that: The upper cover (1) is a rectangular flat plate with a plurality of through holes, and is fixed to the base by bolts; according to measurement requirements, a sensor installation hole is provided on the upper cover.

10. The multi-station multi-specification flexible low-temperature high-speed bearing testing device according to claim 1 is characterized in that: The test medium used liquid nitrogen.

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