Sliding bearing high-pressure sealing device and high-pressure test equipment

Abstract

The invention relates to the technical field of bearing test equipment, and provides a sliding bearing high-pressure sealing device and a high-pressure test device.The sliding bearing high-pressure sealing device comprises a test shell, a test bearing, a shaft body, a guide bolt and a sealing plate, a test cavity is formed in the test shell, and the test cavity is used for being filled with high-pressure fluid; the test bearing is arranged in the test cavity; the shaft body penetrates through the test shell; the guide bolt is arranged in the test cavity; the sealing plate is arranged in the test cavity; a shaft hole and a sliding hole are formed in each sealing plate, the shaft body penetrates through the shaft hole, the guide bolt movably penetrates through the sliding hole, the sealing plates have moving strokes which swing along with the shaft body in the radial direction of the shaft body, the guide bolt is used for limiting swing of the sealing plates, and the sealing plates block the first opening or the second opening in the initial state or the swing state. The sliding bearing high-pressure sealing device and the high-pressure test equipment aim at solving the problem that in the prior art, shaft end sealing of a bearing testing machine cannot move along with a shaft and run synchronously with high-pressure sealing.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing test equipment, and particularly relates to a high-pressure sealing device for a sliding bearing and a high-pressure test equipment. Background Art

[0002] In the traditional technology, the shaft-end seal of a bearing testing machine can only seal low-pressure fluids. When it comes to high-pressure fluid tests, the shaft-end seal cannot achieve synchronous operation with the shaft movement and high-pressure sealing, and the seal is prone to failure, resulting in inconvenience in high-pressure tests of bearings. Summary of the Invention

[0003] The present invention provides a high-pressure sealing device for a sliding bearing and a high-pressure test equipment, aiming to solve the problem that the shaft-end seal of a bearing testing machine in the traditional technology cannot achieve synchronous operation with the shaft movement and high-pressure sealing.

[0004] In view of the problems existing in the prior art, an embodiment of the present invention provides a high-pressure sealing device for a sliding bearing, including: A test housing having a test chamber therein, and a first opening and a second opening are provided at both ends of the test housing and are communicated with the test chamber, and the test chamber is used for filling high-pressure fluid; A test bearing disposed in the test chamber, and both radially ends of the test bearing are connected to the test housing; A shaft body penetrating through the test housing and sequentially passing through the first opening, the test bearing, and the second opening; A guide bolt disposed in the test chamber, and the extending direction of the guide bolt is parallel to that of the shaft body; and, A sealing plate disposed in the test chamber and located inside the first opening and the second opening respectively; Wherein, shaft holes and sliding holes are formed in each of the sealing plates, the shaft body penetrates through the shaft holes, the guide bolt movably penetrates through the sliding holes, the sealing plate has a moving stroke of swinging along the radial direction of the shaft body, the guide bolt is used for limiting the swing of the sealing plate, and the sealing plate blocks the first opening or the second opening in the initial state or the swinging state.

[0005] According to the high-pressure sealing device for a sliding bearing provided by the present invention, limiting grooves are formed inside the first opening and the second opening, and a limiting boss is provided on one side of each of the sealing plates, and the limiting boss blocks the first opening or the second opening in the initial state or the swinging state; The limiting boss is disposed in the limiting groove, and there is a sliding distance between both ends of the limiting boss and the side walls of the corresponding limiting groove.

[0006] A high-pressure sealing device for a sliding bearing according to the present invention, on one side of the limiting groove, a first installation groove is further opened, and a radial sealing ring is arranged in the first installation groove; alternatively, on the side surface of the sealing plate, a first installation groove is opened, and the radial sealing ring is arranged in the first installation groove.

[0007] A high-pressure sealing device for a sliding bearing according to the present invention, on the side of the sealing plate away from the first opening or the second opening, a second installation groove is opened, and a shaft-end sealing ring is arranged in the second installation groove, and the shaft body passes through the shaft-end sealing ring.

[0008] A high-pressure sealing device for a sliding bearing according to the present invention, the guiding bolt includes a connecting bolt and a limiting plate arranged at the end of the connecting bolt, one end of the connecting bolt is connected to the inner wall of the test cavity, and the other end movably passes through the sliding hole, and the limiting plate abuts against the side wall of the sealing plate.

[0009] A high-pressure sealing device for a sliding bearing according to the present invention, the connecting bolt includes a threaded section and a smooth section, the threaded section is used for connecting with the inner wall of the test cavity, and the smooth section is used for movably passing through the sliding hole.

[0010] A high-pressure sealing device for a sliding bearing according to the present invention, at least two sliding holes are opened at both ends in the radial direction of each sealing plate, and one connecting bolt is arranged in each sliding hole.

[0011] A high-pressure sealing device for a sliding bearing according to the present invention, a bearing seat is further arranged in the test cavity, the bearing seat includes an installation cylinder and an installation ring arranged in the installation cylinder, and the installation cylinder is coaxially arranged with the test shell; the test bearing includes a base and a bearing arranged on the base, the bearing is inserted into the installation ring, the upper end surface of the base abuts against the installation ring, and the side surface of the base abuts against the installation cylinder.

[0012] A high-pressure sealing device for a sliding bearing according to the present invention, a loading groove is further opened on the side wall of the test shell, and the loading groove is used for connecting with a loading mechanism.

[0013] The present invention also provides a bearing high-pressure test device, including: a support seat, a motor, a torque and speed sensor, a coupling, a loading mechanism and a high-pressure sealing device for a sliding bearing arranged on the support seat, and the high-pressure sealing device for a sliding bearing is the high-pressure sealing device for a sliding bearing as described in any one of the above; One end of the torque and speed sensor is connected to the motor through the coupling, and the other end is connected to the shaft body through the coupling. A loading groove is further opened on the side wall of the test shell, and the output end of the loading mechanism is arranged in the loading groove for applying a pulling force to the test shell.

[0014] The sliding bearing high-pressure sealing device provided by the present invention, when performing high-pressure bearing tests, since the sealing plate is provided with sliding holes that cooperate with the guiding bolts, when the sealing plate swings radially along with the shaft body, the guiding bolts guide and limit the swing of the sealing plate; in addition, since the diameter of the sealing plate is greater than the diameter of the first opening or the second opening, the sealing plate can block the first opening or the second opening in both the initial state and the swinging state, so that the sliding bearing high-pressure sealing device provided by the present invention can satisfy both high-pressure sealing and movement along with the shaft. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic cross-sectional structure diagram of the sliding bearing high-pressure sealing device provided by the present invention; Figure 2 is Figure 1 a front view structural diagram of the sealing plate in Figure 3 is Figure 1 a side view structural diagram of the guiding bolt in Figure 4 is Figure 1 a partial enlarged schematic diagram of Figure 5 is a schematic cross-sectional structure diagram of the bearing high-pressure test equipment provided by the present invention.

[0017] Reference numerals: 1, sliding bearing high-pressure sealing device; 11, test housing; 111, first opening; 112, second opening; 113, test chamber; 114, limiting groove; 115, first installation groove; 116, radial sealing ring; 117, bearing seat; 118, installation cylinder; 119, installation ring; 12, test bearing; 121, base; 122, bearing; 13, shaft body; 14, guiding bolt; 141, connecting bolt; 142, limiting plate; 143, threaded section; 144, smooth section; 15, sealing plate; 151, shaft hole; 152, sliding hole; 153, second installation groove; 154, limiting boss; 155, shaft end sealing ring; 16, loading groove; 2, motor; 3, torque and speed sensor; 4, coupling; 5, loading mechanism; 6, support seat. Detailed Embodiments

[0018] To make the objectives, technical solutions and advantages of the present invention more clear, the following will, in conjunction with the accompanying drawings of the present invention, clearly and completely describe the technical solutions in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0020] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0022] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation on the present invention.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the applicability of other processes and / or the use of other materials.

[0024] The following combines Figures 1 - 5 to describe the sliding bearing high-pressure sealing device and high-pressure test equipment provided by the present invention.

[0025] In view of the problem in the prior art that the shaft end seal of the bearing test machine cannot achieve synchronous operation of moving with the shaft and high-pressure sealing, in view of the problems existing in the prior art, refer to Figure 1 and Figure 2 The embodiment of the present invention provides a sliding bearing high-pressure sealing device 1, including a test housing 11, a test bearing 12, a shaft body 13, a guide bolt 14, and a sealing plate 15.

[0026] The test housing 11 has a test chamber 113 therein. The two ends of the test housing 11 are provided with a first opening 111 and a second opening 112 communicating with the test chamber 113. The test chamber 113 is used for filling high-pressure fluid. The test bearing 12 is arranged in the test chamber 113. The two ends of the test bearing 12 in the radial direction are connected to the test housing 11, that is, the test bearing 12 is fixedly arranged in the test chamber 113. The shaft body 13 penetrates through the test housing 11 and sequentially passes through the first opening 111, the test bearing 12, and the second opening 112. The guide bolt 14 is arranged in the test chamber 113, and the extending direction of the guide bolt 14 is parallel to that of the shaft body 13. The sealing plate 15 is arranged in the test chamber 113, and the sealing plate 15 is arranged on the inner sides of both the first opening 111 and the second opening 112.

[0027] Further, shaft holes 151 and sliding holes 152 are formed in each of the sealing plates 15. The shaft body 13 passes through the shaft holes 151, and the guiding bolts 14 are movably inserted into the sliding holes 152. It should be noted that during the test of the bearing 122, the shaft body 13 rotates axially and swings radially. The sealing plate 15 does not rotate with the shaft body 13. However, when the shaft body 13 swings radially, the sealing plate 15 is pushed by the shaft body 13 to swing. Due to the arrangement of the sliding holes 152, when the sealing plate 15 swings, the guiding bolts 14 slide in the sliding holes 152 to limit and guide the swing of the sealing plate 15. Further, the sizes of the first opening 111 and the second opening 112 are not necessarily the same. The size of the sealing plate 15 is larger than the size of the corresponding first opening 111 or the second opening 112. The sealing plate 15 seals the first opening 111 or the second opening 112 in both the initial state and the swinging state, so that the sliding bearing high-pressure sealing device 1 provided by the present invention has both the effects of high-pressure sealing and movement along with the shaft.

[0028] To further limit the movement of the sealing plate 15, limiting grooves 114 are formed on the inner sides of the first opening 111 and the second opening 112. The limiting grooves 114 extend along the circumferences of the first opening 111 or the second opening 112. For example, the limiting grooves 114 are arranged in an annular structure. Correspondingly, a limiting boss 154 is provided on one side of each of the sealing plates 15. Correspondingly, the diameter of the limiting boss 154 should be larger than the diameter of the first opening 111 or the second opening 112. In this way, in the initial state or the swinging state, the limiting boss 154 can seal the first opening 111 or the second opening 112. It should be noted that the limiting boss 154 is arranged in the limiting groove 114, and there is a sliding distance between the two ends of the limiting boss 154 and the side walls of the corresponding limiting groove 114. In this way, the limiting boss 154 can move in the limiting groove 114. When the sealing plate 15 moves upward along the shaft to the limit position, it will abut against the upper side wall of the limiting groove 114. When the sealing plate 15 moves downward along the shaft to the limit position, it will abut against the lower side wall of the limiting groove 114. The two sliding distances should preferably be kept equal. In this way, on the one hand, the limiting boss 154 can be positioned and installed, and on the other hand, the movement of the sealing plate 15 can be limited, making its swing more stable and not easy to fall off.

[0029] By providing the limiting boss 154, two sealing lines of defense are formed on the sealing plate 15. The first line of defense is the sealing line of defense between the limiting boss 154 and the limiting groove 114, and the second line of defense is the abutting seal between the side wall of the sealing plate 15 itself and the side wall of the test chamber 113. Since there is a sliding distance between the limiting boss 154 and the limiting groove 114, in an optional embodiment, please refer to Figure 4, on one side of the limiting groove 114, a first installation groove 115 is further opened, and a radial sealing ring 116 is arranged in the first installation groove 115; alternatively, in another optional embodiment, a first installation groove 115 is opened on the side surface of the sealing plate 15, and a radial sealing ring 116 is arranged in the first installation groove 115. The radial sealing ring 116 can seal and connect the side surface of the sealing plate 15 and the inner wall of the test chamber 113, ensuring that the sealing plate 15 completely blocks the first opening 111 or the second opening 112. Further, an elastic sealing ring can also be sleeved on the outer periphery of the limiting boss 154, and the elastic sealing ring can be set to exactly fill the sliding distance. In this way, on the one hand, the elastic sealing ring can play a sealing role, and on the other hand, due to the elasticity of the elastic sealing ring, it can still provide a certain moving space for the sealing plate 15 through extrusion deformation.

[0030] Further, when shaft end sealing is still required after radial sealing. Specifically, refer to Figure 1 , on the side of the sealing plate 15 away from the first opening 111 or the second opening 112, a second installation groove 153 is opened, and a shaft end sealing ring 155 is arranged in the second installation groove 153, and the shaft body 13 passes through the shaft end sealing ring 155. The shaft end sealing ring 155 plays a sealing role in the circumferential direction of the shaft body 13 and is the third sealing line of defense formed on the sealing plate 15.

[0031] Furthermore, there are various ways to set the guide bolts 14. In an optional embodiment, the two ends of the guide bolt 14 can be respectively connected to the inner walls of the test chamber 113 at the first opening 111 and the second opening 112. In this way, one guide bolt 14 can sleeve two sealing plates 15 at both ends simultaneously. In another optional embodiment, refer to Figure 3 , the guide bolt 14 includes a connecting bolt 141 and a limiting plate 142 arranged at the end of the connecting bolt 141. One end of the connecting bolt 141 is connected to the inner wall of the test chamber 113, and the other end movably passes through the sliding hole 152, and the limiting plate 142 abuts against the side wall of the sealing plate 15. With such a setting, at least one guide bolt 14 is correspondingly arranged for each sealing plate 15.

[0032] In order to facilitate the installation and connection of the guide bolts 14, in the technical solution provided by the present invention, the connecting bolt 141 includes a threaded section 143 and a smooth section 144. The threaded section 143 is used to connect with the inner wall of the test chamber 113, and the smooth section 144 is used to movably pass through the sliding hole 152. In this way, the guide bolts 14 can be conveniently installed and disassembled through the thread. In actual application, please refer to Figure 3 , threads can be formed at the end of a smooth stud. In this way, the nut of the stud can act as the limiting plate 142, the threaded part of the stud acts as the threaded section 143, and the other part acts as the smooth section 144.

[0033] Further, since the sealing plate 15 needs to swing up and down in the radial direction of the shaft body 13, in order to improve the stability of the movement of the sealing plate 15, at least two sliding holes 152 are provided at both ends of each sealing plate 15 in the radial direction, and a connecting bolt 141 is provided in each sliding hole 152. Taking the first opening 111 as an example, a guiding bolt 14 can be provided at the upper end and the lower end of the first opening 111 respectively, corresponding to the two sliding holes 152 in the radial direction of the sealing plate 15. In an alternative embodiment, more sliding holes 152 can also be provided. Please refer to Figure 2 , for example, four sliding holes 152 are provided on the sealing plate 15, and the four sliding holes 152 are distributed in a diamond array. Taking the first opening 111 as an example, a guiding bolt 14 is provided at the upper end, the lower end, the left end, and the right end of the first opening 111, corresponding to the four sliding holes 152 on the sealing plate 15. In this setting mode, the movement of the sealing plate 15 is more stable and smooth.

[0034] As described above, the bearing seat 117 is fixedly installed in the test chamber 113. In order to facilitate the installation of the bearing seat 117, a bearing seat 117 is also provided in the test chamber 113. Please refer to Figure 1 , the bearing seat 117 includes an installation cylinder 118 and an installation ring 119 provided in the installation cylinder 118. The installation cylinder 118 and the installation ring 119 can be selected to be detachably connected or integrally formed. The installation cylinder 118 is coaxially arranged with the test shell 11. The test bearing 12 includes a base 121 and a bearing 122 provided on the base 121. The bearing 122 is inserted into the inner side of the installation ring 119. The upper end surface of the base 121 abuts against the installation cylinder 118, and the side surface of the base 121 abuts against the installation ring 119. In order to ensure the stability of the connection, the base 121 and the installation ring 119 are locked by bolts.

[0035] Further, for the convenience of installation and disassembly, the test shell 11 includes a cylinder body and cover plates provided at both ends of the cylinder body. The cover plates and the cylinder body are detachably connected by bolts. A loading groove 16 is also provided on the side wall of the test shell 11, and the loading groove 16 is used for connecting the loading mechanism 5 to facilitate the bearing high-pressure test.

[0036] Based on the above device, refer to Figure 5 , the present invention also provides a bearing high-pressure test device, including a support seat 6, a motor 2, a torque and speed sensor 3, a coupling 4, a loading mechanism 5, and a sliding bearing high-pressure sealing device 1. The motor 2, the torque and speed sensor 3, the coupling 4, the loading mechanism 5, and the sliding bearing high-pressure sealing device 1 are respectively arranged on the support seat 6.

[0037] Specifically, please refer to Figure 5, one end of the torque and speed sensor 3 is connected to the motor 2 through the coupling 4, and the other end is connected to the shaft body 13 through the coupling 4. A loading groove 16 is provided on the side wall of the test housing 11, and the output end of the loading mechanism 5 is arranged in the loading groove 16 for applying a tensile force to the test housing 11. It should also be noted that seats are provided on both sides of the sliding bearing high-pressure sealing device 1 for supporting the sliding bearing high-pressure sealing device 1. The loading mechanism 5 generally adopts an oil cylinder, and a force sensor is arranged in the loading mechanism 5 for detecting the tensile force applied by the loading mechanism 5 to the test housing 11.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure sealing device for a sliding bearing, characterized in that, Comprising: A test housing having a test chamber therein. First and second openings communicating with the test chamber are formed at both ends of the test housing, and the test chamber is for filling with high-pressure fluid. A test bearing disposed in the test chamber, with both radially outer ends of the test bearing connected to the test housing. A shaft body penetrating through the test housing and sequentially passing through the first opening, the test bearing, and the second opening. A guide bolt disposed in the test chamber, with the extending direction of the guide bolt parallel to that of the shaft body; and A sealing plate disposed in the test chamber and located inside the first opening and the second opening respectively. Wherein, shaft holes and sliding holes are formed in each of the sealing plates. The shaft body passes through the shaft holes, and the guide bolt movably passes through the sliding holes. The sealing plate has a moving stroke of swinging along the radial direction of the shaft body with the shaft body, and the guide bolt is used to limit the swinging of the sealing plate. The sealing plate blocks the first opening or the second opening in the initial state or the swinging state.

2. The high-pressure sealing device for a sliding bearing according to claim 1, characterized in that, Limiting grooves are formed inside the first opening and the second opening respectively. A limiting boss is provided on one side of each of the sealing plates, and the limiting boss blocks the first opening or the second opening in the initial state or the swinging state. The limiting boss is disposed in the limiting groove, and there is a sliding distance between both ends of the limiting boss and the side walls of the corresponding limiting groove.

3. The sliding bearing high-pressure sealing device according to claim 2, wherein, A first installation groove is further formed on one side of the limiting groove, and a radial sealing ring is provided in the first installation groove; or, a first installation groove is formed on the side surface of the sealing plate, and the radial sealing ring is provided in the first installation groove.

4. The high-pressure sealing device for a sliding bearing according to claim 1, characterized in that A second installation groove is formed on the side of the sealing plate away from the first opening or the second opening, and a shaft-end sealing ring is provided in the second installation groove. The shaft body passes through the shaft-end sealing ring.

5. The high-pressure sealing device for a sliding bearing according to claim 1, wherein, The guide bolt includes a connecting bolt and a limiting plate disposed at the end of the connecting bolt. One end of the connecting bolt is connected to the inner wall of the test chamber, and the other end movably passes through the sliding hole. The limiting plate abuts against the side wall of the sealing plate.

6. The high-pressure sealing device for a sliding bearing according to claim 5, characterized in that, The connecting bolt includes a threaded section and a smooth section. The threaded section is for connecting with the inner wall of the test chamber, and the smooth section is for movably passing through the sliding hole.

7. The high-pressure sealing device for a sliding bearing according to claim 5, characterized in that, At least two sliding holes are formed at both radially outer ends of each of the sealing plates, and one connecting bolt is provided in each of the sliding holes.

8. The high-pressure sealing device for a sliding bearing according to claim 1, characterized in that, A bearing seat is further disposed in the test chamber. The bearing seat includes an installation cylinder and an installation ring disposed in the installation cylinder. The installation cylinder is coaxially arranged with the test housing; the test bearing includes a base and a bearing disposed on the base. The bearing is inserted into the installation ring, the upper end surface of the base abuts against the installation ring, and the side surface of the base abuts against the installation cylinder.

9. The high-pressure sealing device for a sliding bearing according to claim 1, characterized in that, A loading groove is further formed on the side wall of the test housing, and the loading groove is for connecting with a loading mechanism.

10. A high-pressure test device for bearings, characterized in that, Comprising: A support seat, a motor, a torque and speed sensor, a coupling, a loading mechanism, and a high-pressure sealing device for a sliding bearing disposed on the support seat. The high-pressure sealing device for a sliding bearing is the high-pressure sealing device for a sliding bearing according to any one of claims 1-9. One end of the torque and speed sensor is connected to the motor through the coupling, and the other end is connected to the shaft body through the coupling. A loading groove is also formed in the side wall of the test housing, and the output end of the loading mechanism is arranged in the loading groove for applying a tensile force to the test housing.

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