Measuring device and measuring method

Abstract

The present invention relates to the technical field of leakage detection of squeeze film dampers, and particularly relates to a measuring device and a measuring method. The measuring device includes: a support device; a damper, mounted on the support device, and including an outer ring, an inner ring, and two piston rings. The outer ring is sleeved outside the inner ring. Two axially spaced grooves are provided on the outer wall of the inner ring. The two piston rings are respectively arranged in the two grooves, and together with the inner ring and the outer ring, they enclose an oil film cavity. An oil injection hole communicating with the oil film cavity is provided on the outer ring. The piston ring has two free ends with an opening therebetween. A glue injection channel is provided on the axial side of the piston ring away from the other piston ring. When the glue injection channel is blocked by sealant, it prevents the oil from leaking through the gap between the piston ring and the inner wall of the outer ring; and an oil receiving device, arranged below the damper, for collecting the oil leaked from the damper. Based on this, the measurement of the leakage amount of the squeeze film damper can be conveniently realized.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage detection of squeeze film dampers, and particularly relates to a measuring device and a measuring method. Background Art

[0002] A squeeze film damper is a vibration damping component that is arranged between a bearing and a bearing housing, and uses the damping effect generated when the oil film is squeezed to reduce the vibration of the rotor.

[0003] During the working process, there is leakage in the squeeze film damper, which affects the damping effect. Therefore, when studying the damping performance of the squeeze film damper, it is necessary to measure the leakage amount of the squeeze film damper. However, in the related art, there are no relevant measuring devices and measuring methods. Summary of the Invention

[0004] Embodiments of the present invention provide a measuring device and a measuring method that can measure the leakage amount of a squeeze film damper.

[0005] The measuring device provided by the embodiments of the present invention includes:

[0006] A support device;

[0007] A damper, installed on the support device, and including an outer ring, an inner ring, and two piston rings. The outer ring is sleeved outside the inner ring. Two grooves are provided on the outer wall of the inner ring at intervals along the axial direction. The two piston rings are respectively arranged in the two grooves, and together with the inner ring and the outer ring, form an oil film cavity. An oil injection hole communicating with the oil film cavity is provided on the outer ring. The piston ring has two free ends with an opening therebetween. A glue injection channel is provided on the axial side of the piston ring away from the other piston ring. When the glue injection channel is blocked by a sealant, it prevents the oil from leaking through the gap between the piston ring and the inner wall of the outer ring; and

[0008] An oil receiving device, arranged below the damper, for collecting the oil leaked from the damper.

[0009] In some embodiments, a positioning hole is provided on the outer ring, and the positioning hole communicates with the oil film cavity. The measuring device further includes:

[0010] A plugging member, for plugging the positioning hole and detachably connecting with the positioning hole; and

[0011] An extrusion member, when the plugging member does not plug the positioning hole, passing through the positioning hole to extrude the piston ring against the side wall of the groove close to the glue injection channel.

[0012] In some embodiments, at least one axial end of the outer ring is provided with an oil baffle, and the oil baffle faces downward and is inclined toward the axial outside of the damper to guide the oil leaked from the damper into the oil receiving device.

[0013] In some embodiments, the oil baffle is detachably connected to the outer ring.

[0014] In some embodiments, the oil receiving device includes a first container and a second container, which are arranged side by side along the axial direction of the damper and are used to receive the oil leaked from both axial sides of the damper.

[0015] In some embodiments, the damper is detachably connected to the support device.

[0016] In some embodiments, the support device includes a base, a first support and a second support. Both the first support and the second support are connected to the base. The first support is located radially outside the second support. The first support is connected to the outer ring, and the second support is connected to the inner ring.

[0017] In some embodiments, the base includes a first vertical plate, a second vertical plate and a bottom plate. The first vertical plate and the second vertical plate are arranged at intervals along the axial direction of the damper. The bottom plate is connected to the bottoms of the first vertical plate and the second vertical plate. The first support is connected to the first vertical plate, the second support is connected to the second vertical plate, and the oil receiving device is located on the bottom plate.

[0018] In some embodiments, the first support includes a first cylinder, a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are connected to the axial ends of the first cylinder and extend radially outward and radially inward from the first cylinder respectively. The first connecting plate is connected to the first vertical plate, the second connecting plate is connected to the outer ring, and an oil leakage hole is provided on the side wall of the first cylinder. The oil leakage hole is located below the damper.

[0019] In some embodiments, the second support includes a second cylinder, a third connecting plate and a fourth connecting plate. The third connecting plate and the fourth connecting plate are connected to the axial ends of the second cylinder and both extend radially outward from the first cylinder. The third connecting plate is connected to the inner ring, and the fourth connecting plate is connected to the second vertical plate.

[0020] The measurement method of the measurement device based on each embodiment provided by the present invention includes:

[0021] Measuring the total leakage amount U of the damper by using the measurement device, including:

[0022] In the case where the injection channel is not blocked by injection glue, injecting oil into the oil film cavity through the oil injection hole and conducting tests under preset conditions, and measuring the amount of oil collected by the oil receiving device per unit time as the total leakage amount U. The total leakage amount U includes the leakage amounts of the damper at the first sealing surface and the opening per unit time. The first sealing surface is the sealing surface between the piston ring and the inner wall of the outer ring; and / or,

[0023] Measuring the opening leakage amount W of the damper by using the measurement device, including:

[0024] Inject sealant into the glue injection channel to block the glue injection channel; and

[0025] Inject oil into the oil film cavity through the oil injection hole, and conduct a test under preset conditions. Measure the amount of oil collected by the oil receiving device per unit time as the opening leakage amount W. The opening leakage amount W is the leakage amount of the damper at the opening per unit time.

[0026] In some embodiments, measuring the total leakage amount U using the measuring device further includes:

[0027] Before injecting oil into the oil film cavity through the oil injection hole, block the positioning hole using a blocking member.

[0028] In some embodiments, measuring the amount of oil collected by the oil receiving device per unit time as the total leakage amount U includes:

[0029] Measure the amount of oil collected by the first container and the second container of the oil receiving device per unit time. Take the amount of oil collected by the first container per unit time as the total leakage amount U1 on the first side, take the amount of oil collected by the second container per unit time as the total leakage amount U2 on the second side, and take the sum of the total leakage amount U1 on the first side and the total leakage amount U2 on the second side as the total leakage amount U.

[0030] In some embodiments, measuring the opening leakage amount W using the measuring device further includes:

[0031] Before injecting sealant into the glue injection channel, pass the extrusion member through the positioning hole and press the piston ring against the side wall of the groove close to the glue injection channel; and

[0032] After blocking the glue injection channel and before injecting oil into the oil film cavity through the oil injection hole, remove the extrusion member and block the positioning hole using a blocking member.

[0033] In some embodiments, the measuring method further includes:

[0034] After completing the measurement of the opening leakage amount W, remove the sealant in the glue injection channel.

[0035] In some embodiments, measuring the amount of oil collected by the oil receiving device per unit time as the opening leakage amount W includes:

[0036] Measure the amount of oil collected by the first container and the second container of the oil receiving device between units of time. Take the amount of oil collected by the first container per unit time as the opening leakage amount W1 on the first side, take the amount of oil collected by the second container per unit time as the opening leakage amount W2 on the second side, and take the sum of the opening leakage amount W1 on the first side and the opening leakage amount W2 on the second side as the opening leakage amount W.

[0037] In some embodiments, before conducting the test under preset conditions, install the oil baffle of the measuring device onto the outer ring.

[0038] In some embodiments, the measuring method includes:

[0039] measuring the total leakage amount U and the open leakage amount W; and

[0040] taking the difference between the measured total leakage amount U and the open leakage amount W as the leakage amount V of the first sealing surface, where the leakage amount V of the first sealing surface is the leakage amount of the damper at the first sealing surface per unit time.

[0041] In some embodiments, taking the difference between the measured total leakage amount U and the open leakage amount W as the leakage amount V of the first sealing surface includes:

[0042] taking the difference between the measured total leakage amount U1 on the first side and the open leakage amount W1 on the first side as the leakage amount V1 of the first-side sealing surface, taking the difference between the total leakage amount U2 on the second side and the open leakage amount W2 on the second side as the leakage amount V2 of the second-side sealing surface, and taking the sum of the leakage amount V1 of the first-side sealing surface and the leakage amount V2 of the second-side sealing surface as the leakage amount V of the first sealing surface.

[0043] In some embodiments, when measuring the total leakage amount U and the open leakage amount W, first measure the total leakage amount U, and then measure the open leakage amount W.

[0044] Based on the measuring device and the measuring method provided by the embodiments of the present invention, the measurement of the leakage amount of the squeeze film damper can be conveniently realized.

[0045] Other features and advantages of the present invention will become clear by describing the exemplary embodiments of the present invention in detail with reference to the following drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 is a half-sectional view of the squeeze film damper.

[0048] Figure 2 is a partially enlarged schematic view of the squeeze film damper at the piston ring.

[0049] Figure 3 shows the squeezing effect of the oil on the piston ring.

[0050] Figure 4 shows the state change of the piston ring with an opening before and after installation.

[0051] Figure 5 This is a 1 / 4 cross-sectional view of the measuring device in the embodiment of the present invention without the oil baffle installed.

[0052] Figure 6 This is a sectional view of the measuring device in the embodiment of the present invention after the oil baffle is installed.

[0053] Figure 7 Shows the opening of the piston ring in the embodiment of the present invention.

[0054] Figure 8 This is a schematic diagram of the distribution of the positioning holes and oil injection holes on the outer ring in the embodiment of the present invention.

[0055] Figure 9 Shows the gluing process in the embodiment of the present invention.

[0056] Figure 10 Shows the extrusion effect of the extruding member on the piston ring in the embodiment of the present invention.

[0057] Figure 11 and Figure 12 Shows the measuring devices with dampers of different specifications.

[0058] Explanation of reference numerals:

[0059] 100, measuring device; 101, supporting device; 102, damper; 104, extruding member; 105, oil receiving device; 106, oil film cavity;

[0060] 1, base; 11, first vertical plate; 12, second vertical plate; 13, bottom plate; 14, connecting hole;

[0061] 2, first support; 21, first cylinder; 22, first connecting plate; 23, second connecting plate; 24, oil leakage hole;

[0062] 3, second support; 31, second cylinder; 32, third connecting plate; 33, fourth connecting plate;

[0063] 4, outer ring; 41, oil injection hole; 42, positioning hole; 43, groove; 44, stop port; 45, outer cylinder; 46, first vertical plate;

[0064] 5, inner ring; 51, inner cylinder; 52, second vertical plate;

[0065] 6, piston ring; 61, opening; 62, first sealing surface; 63, second sealing surface;

[0066] 71, needle; 72, gluing member; 73, gluing channel; 74, first section; 75, second section;

[0067] 8, oil baffle;

[0068] 91. First container; 92. Second container;

[0069] 200. Squeeze film damper; 201. Limiter; 202. Elastic support; 204. Connection section; 205. Squirrel cage section;

[0070] 300. Bearing. Detailed implementation manners

[0071] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0072] For technologies, methods, and devices known to those of ordinary skill in the relevant art, they may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0073] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0074] In the description of the present invention, it should be understood that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above words have no special meaning, and therefore cannot be understood as limiting the protection scope of the present invention.

[0075] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0076] The squeeze film damper mainly achieves the vibration reduction effect by increasing the damping of the rotor system. For example, in equipment such as aeroengines, the rotational speed of the rotor is usually set above the critical speed, and the rotor needs to often pass through the critical speed during the start and stop processes. In order to reduce the vibration of the rotor when passing through the critical speed, a squeeze film damper is generally arranged at the bearing of the rotor. By increasing the damping of the rotor system, the vibration amplitude of the rotor when passing through the critical speed is reduced, so as to prevent the rotor from vibrating too much.

[0077] Figure 1-2 Fig. shows a typical structure of a squeeze film damper in the related art.

[0078] As Figure 1-2 shown, the squeeze film damper 200 includes a limiter 201, a resilient support 202 and two piston rings 6. The limiter 201 and the resilient support 202 are sleeved in sequence from outside to inside and are concentric with each other. An installation hole is provided inside the resilient support 202 for installing the bearing 300. Two grooves 43 are provided on the outer wall of the resilient support 202 and are axially spaced from each other. The two piston rings 6 are correspondingly arranged in the two grooves 43 one by one, and together with the limiter 201 and the resilient support 202, enclose to form an oil film cavity 106. An oil injection hole 41 is provided on the limiter 201, and the oil injection hole 41 communicates with the oil film cavity 106 for guiding oil into the oil film cavity 106 to form an oil film.

[0079] During the rotation of the rotor, the resilient support 202 drives the bearing 300 to generate a radial movement relative to the limiter 201, squeezing the oil film in the oil film cavity 106, converting kinetic energy into heat energy for dissipation, thereby generating a damping effect and playing a role in vibration reduction.

[0080] Figure 2 And Figure 4 respectively show the cross-sectional and axial end face shapes of the piston ring 6. Combining Figure 2 and Figure 4 it can be known that the piston ring 6 is a non-closed circular ring structure with a rectangular cross-section, which has an opening 61. In other words, the piston ring 6 has two free ends, and an opening 61 is provided between the two free ends.

[0081] By providing the opening 61, the piston ring 6 can be deformed by squeezing the piston ring 6, so as to conveniently realize the installation of the piston ring 6 between the limiter 201 and the resilient support 202. However, due to the existence of the opening 61, oil leakage will occur at the opening 61.

[0082] Figure 4 The opening 61 shown in Figure 7 is relatively simple, which is a rectangular opening. However, as a variant, referring to Figure 2Compared with the opening 61 shown, it is helpful to reduce leakage and reduce the amount of air entering the oil film cavity 106 to prevent excessive air from entering and affecting the damping effect.

[0083] The states of the piston ring 6 before and after installation are as follows: Figure 4 As shown by the dashed and solid lines. Figure 4 As can be seen from the dotted line in the figure, the piston ring 6 is in a free state before installation, and the size of the opening 61 is relatively large, namely S1. Figure 4 It can be seen from the solid line that after installation, the piston ring 6 is in a working state and is squeezed and deformed, and the size of the opening 61 is reduced to S2. This deformation causes a certain pressure to form between the piston ring 6 and the inner wall surface of the limiter 201, which is beneficial to improving the sealing performance of the piston ring 6.

[0084] The sealing performance of piston ring 6 is shown in Figure 2 .like Figure 2 As shown, the piston ring 6 installed in the groove 43 contacts the inner wall of the limiter 201 to form a first sealing surface 62. At the same time, the piston ring 6 also contacts the side wall of the groove 43 on the axial outer side to form a second sealing surface 63. The first sealing surface 62 is a contact between arc surfaces, and the second sealing surface 63 is a contact between planes.

[0085] Figure 3 The figure shows the oil pressure that the piston ring 6 is subjected to during operation. Figure 3 As shown by the middle arrow, during the operation of the squeeze film damper 200, the oil will exert squeezing force on the piston ring 6 toward the radial outside and the axial outside, pressing the piston ring 6 against the inner wall of the limiter 201 and the side wall of the groove 43 close to the axial outside, thereby increasing the pressure at the first sealing surface 62 and the second sealing surface 63.

[0086] Since the second sealing surface 63 is a plane, a tight seal can be formed at the first sealing surface 62, and oil leakage hardly occurs, and the leakage amount can be ignored during measurement.

[0087] However, the first sealing surface 62 is not a plane, and even under the extrusion of the oil toward the radial outside during operation, it is difficult to form a tight seal at the first sealing surface 62, and oil leakage is likely to occur.

[0088] It can be seen that the leakage paths of the squeeze film damper 200 are mainly at the opening 61 and the first sealing surface 62 .

[0089] The damping effect of the squeeze film damper 200 is affected by the leakage, so it is necessary to measure and study the leakage of the squeeze film damper 200. In particular, the damping effect of the squeeze film damper 200 is closely related to the sealing performance of the piston ring 6, so it is necessary to measure and study the leakage at the first sealing surface 62.

[0090] However, there is no effective measuring device and method in the related art. In particular, since the first sealing surface 62 is not a plane, the actual leakage position and leakage amount are relatively random. Therefore, it is difficult to predict the actual sealing situation during product design, and it is impossible to determine the leakage position and leakage amount through simulation methods. At the same time, it is also difficult to directly measure the leakage amount at the first sealing surface 62 through experimental methods. It can be seen that how to determine the leakage amount at the first sealing surface 62 is a difficult problem.

[0091] In view of the above situation, an embodiment of the present invention provides a measuring device 100 and a measuring method to measure the leakage of the squeeze film damper 200 and provide data support for improving the damping effect of the squeeze film damper 200 .

[0092] Figures 5-10 The structure of the measuring device 100 according to the present invention is shown by way of example.

[0093] See also Figures 5-10 The measuring device 100 provided in the embodiment of the present invention includes a supporting device 101 , a damper 102 and an oil receiving device 105 .

[0094] The supporting device 101 is used to support the damper 102 .

[0095] The damper 102 is mounted on the support device 101 and is used to simulate the squeeze film damper 200, so that the leakage of the squeeze film damper 200 can be measured by measuring the leakage of the damper 102. Figures 5-8 As shown, the damper 102 includes an outer ring 4, an inner ring 5 and two piston rings 6. The outer ring 4 is sleeved on the outside of the inner ring 5. Two grooves 43 spaced apart from each other in the axial direction are provided on the outer wall of the inner ring 5. The two piston rings 6 are respectively arranged in the two grooves 43, and together with the inner ring 5 and the outer ring 4, form an oil film cavity 106. The outer ring 4 is provided with an oil injection hole 41 connected to the oil film cavity 106. The piston ring 6 has two free ends with an opening 61 between them.

[0096] Based on the above settings, the outer ring 4 and the inner ring 5 are respectively equivalent to the limiter 201 and the elastic support 202 of the squeeze film damper 200, and are used to simulate the limiter 201 and the elastic support 202. The outer ring 4 and the inner ring 5 have key dimensional parameters (such as radial dimensions and structural parameters of the groove 43) that are consistent with the limiter 201 and the elastic support 202 of the squeeze film damper 200 to be tested. In addition, the structures of the two may be inconsistent with the limiter 201 and the elastic support 202. For example, in some embodiments, the outer ring 4 and the inner ring 5 have the same radial dimensions as the limiter 201 and the elastic support 202, respectively, but the specific structures of the two are simplified on the basis of the limiter 201 and the elastic support 202. Specifically, compare Figure 5and Figure 1 It can be seen that in some embodiments, like the limiter 201, the outer ring 4 still has an outer cylinder 45, and the outer cylinder 45 of the outer ring 4 has the same diameter as the outer cylinder 45 of the limiter 201. However, unlike the limiter 201, the outer ring 4 no longer has a connecting section 204 that extends obliquely from one axial end of the outer cylinder 45 towards the radially outer side. The inner ring 5 still has an inner cylinder 51 of the elastic support 202, and the inner cylinders 51 of both have the same diameter. However, unlike the limiter 201, the inner ring 5 no longer has a squirrel-cage section 205 connected to one axial end of the inner cylinder 51. Simplifying the structures of the outer ring 4 and the inner ring 5 while keeping the key dimensions consistent is beneficial to simplifying the structure of the measuring device 100 and will not affect the accuracy of the measurement results.

[0097] In addition, based on the above settings, the piston ring 6 of the measuring device 100 is used to simulate the piston ring 6 of the squeeze film damper 200. The piston ring 6 of the measuring device 100 has exactly the same structure as the piston ring 6 of the squeeze film damper 200. The piston ring 6 in the measuring device 100 can either be another piston ring 6 with the same structure other than the piston ring 6 of the squeeze film damper 200 to be tested, or be the same piston ring 6 as the piston ring 6 of the squeeze film damper 200 to be tested. That is, the piston ring 6 of the squeeze film damper 200 to be tested can be removed and installed in the measuring device 100. Although Figure 7 the opening 61 shown in

[0098] is a Z-shaped opening, as a variant, the opening 61 can also be rectangular or other shapes, and can be specifically determined according to the shape of the opening 61 of the piston ring 6 of the squeeze film damper 200 to be measured, as long as the two are consistent.

[0099] In addition, referring to Figures 9-10 , in some embodiments, a sealant injection channel 73 is provided on the axial side of the piston ring 6 away from the other piston ring 6. The sealant injection channel 73 extends to the piston ring 6 and communicates with the external environment for injecting sealant. Specifically, the sealant injection channel 73 is located between the outer ring 4, the inner ring 5 and the piston ring 6, and on the side of the piston ring 6 away from the oil film cavity 106, or rather, on the side of the piston ring 6 away from the other piston ring 6.

[0100] The sealant injection member 72 injects sealant into the sealant injection channel 73, which can block the sealant injection channel 73 to achieve the blockage of the sealant injection channel 73. When the sealant injection channel 73 is blocked by the sealant, the oil fluid cannot flow out to the outside through the gap between the piston ring 6 and the inner wall of the outer ring 4, thereby preventing the oil fluid from leaking through the gap between the piston ring 6 and the inner wall of the outer ring 4. That is to say, after the sealant injection channel 73 is blocked, the oil fluid cannot flow out through the first sealing surface 62, which can avoid the leakage at the first sealing surface 62. The measured leakage amount when the sealant injection channel 73 is blocked by sealant is the leakage amount that does not include the leakage amount at the first sealing surface 62. And as described above, the leakage amount at the second sealing surface 63 can be ignored. Therefore, by providing the sealant injection channel 73 and blocking the sealant injection channel 73 during the measurement process, it is convenient for the measuring device 100 to measure the leakage amount at the opening 61, which will be further introduced later.

[0101] It can be seen from Figure 9 that each piston ring 6 corresponds to a sealant injection channel 73. Figure 9 Only the situation when one sealant injection channel 73 is injected with sealant is shown in the figure. The substance filled in the right sealant injection channel 73 is the sealant. The left sealant injection channel 73 is still empty and has not been coated with glue. However, it should be understood that when measuring the leakage amount at the opening 61, both sealant injection channels 73 are blocked by sealant. After the leakage amount at the opening 61 is measured, the sealant in the sealant injection channel 73 can be removed to prevent the sealant from affecting subsequent measurements and thus improve the accuracy of the measurement results.

[0102] Among them, as Figure 10 shown, in some embodiments, the sealant injection channel 73 includes a first section 74 and a second section 75. The first section 74 communicates the second section 75 with the external environment, and the cross-sectional area of the first section 74 gradually becomes smaller. Specifically, the first section 74 is a tapered hole that tapers along the direction of glue injection. The second section 75 is a constant cross-section hole extending from the first section 74 to the piston ring 6. In this way, it is more convenient to inject sealant.

[0103] The oil receiving device 105 is arranged below the damper 102 and is used to collect the oil fluid leaked from the damper 102. During the measurement, the leakage amount can be determined according to the amount of oil collected by the oil receiving device 105. For example, without blocking the sealant injection channel 73, the amount of oil collected by the oil receiving device 105 per unit time can be used as the total leakage amount U. For another example, when the sealant injection channel 73 is blocked, the amount of oil collected by the oil receiving device 105 per unit time can be used as the opening leakage amount W. Among them, the total leakage amount U includes the leakage amounts of the damper 102 at the first sealing surface 62 and the opening 61 per unit time; the opening leakage amount W is the leakage amount of the damper 102 at the opening 61 per unit time.

[0104] As can be seen, the measuring device 100 provided by the embodiments of the present invention can not only measure the total leakage amount U of the squeeze film damper 200, but also measure the leakage amount (i.e., the opening leakage amount W) at the opening 61 of the squeeze film damper 200, which is conducive to more fully studying the damping effect of the squeeze film damper 200.

[0105] Moreover, as described above, the main leakage paths of the squeeze film damper 200 are mainly at the opening 61 and the first sealing surface 62. Therefore, the total leakage amount U can be considered as the sum of the leakage amount at the opening 61 and the leakage amount at the first sealing surface 62. Furthermore, when it is necessary to measure the leakage amount at the first sealing surface 62, the total leakage amount U and the opening leakage amount W can be measured, and based on the measured total leakage amount U and opening leakage amount W, the leakage amount (referred to as the first sealing surface leakage amount V) at the first sealing surface 62 per unit time can be determined. It is not difficult to understand that the first sealing surface leakage amount V is the difference between the total leakage amount U and the opening leakage amount W, that is, the first sealing surface leakage amount V = total leakage amount U - opening leakage amount W.

[0106] Since the injection channel 73 needs to be blocked by injecting glue when measuring the opening leakage amount W, when measuring both the total leakage amount U and the opening leakage amount W, the total leakage amount U can be measured first, and then the opening leakage amount W can be measured, so as to avoid the influence of the residual sealant in the injection channel 73 on the measurement accuracy of the total leakage amount U when measuring the opening leakage amount W first and then the total leakage amount U.

[0107] As can be seen, the provided measuring device 100 can not only measure the total leakage amount U and the opening leakage amount W, but also break through the technical obstacles that it is difficult to obtain the leakage amount at the first sealing surface 62 through simulation calculation and it is also difficult to directly measure it, and realize the measurement of the first sealing surface leakage amount V, providing data for the research on the sealing performance of the piston ring 6, and further providing more comprehensive and powerful data support for the research on the damping effect of the squeeze film damper 200.

[0108] Among them, as Figure 5 and Figure 6 shown, in some embodiments, the oil receiving device 105 includes a first container 91 and a second container 92. The first container 91 and the second container 92 are arranged side by side along the axial direction of the damper 102 and are used to receive the oil leaked from both axial sides of the damper 102. The tops of the first container 91 and the second container 92 are open to facilitate the inflow of oil. The first container 91 and the second container 92 can specifically be oil collecting boxes.

[0109] Based on the set first container 91 and second container 92, when measuring the total leakage amount U, the oil amount collected by the first container 91 per unit time can be used as the total leakage amount U1 on the first side, the oil amount collected by the second container 92 per unit time can be used as the total leakage amount U2 on the second side, and the sum of the total leakage amount U1 on the first side and the total leakage amount U2 on the second side can be used as the total leakage amount U; when measuring the open leakage amount W, the oil amount collected by the first container 91 per unit time can be used as the open leakage amount W1 on the first side, the oil amount collected by the second container 92 per unit time can be used as the open leakage amount W2 on the second side, and the sum of the open leakage amount W1 on the first side and the open leakage amount W2 on the second side can be used as the open leakage amount W; and, when both measuring the total leakage amount U and the open leakage amount W, the difference between the measured total leakage amount U1 on the first side and the open leakage amount W1 on the first side can also be used as the seal surface leakage amount V1 on the first side, the difference between the total leakage amount U2 on the second side and the open leakage amount W2 on the second side can be used as the seal surface leakage amount V2 on the second side, and the sum of the seal surface leakage amount V1 on the first side and the seal surface leakage amount V2 on the second side can be used as the first seal surface leakage amount V. It can be understood that the open leakage amount W1 on the first side and the open leakage amount W2 on the second side respectively correspond to the leakage amounts at the openings 61 of the two piston rings 6; the seal surface leakage amount V1 on the first side and the seal surface leakage amount V2 on the second side respectively correspond to the leakage amounts at the first seal surfaces 62 of the two piston rings 6; the total leakage amount U1 on the first side corresponds to the leakage amounts of one piston ring 6 at the opening 61 and the first seal surface 62, and the total leakage amount U2 on the second side corresponds to the leakage amounts of the other piston ring 6 at the opening 61 and the first seal surface 62.

[0110] It can be seen that by setting the first container 91 and the second container 92, not only can the measurement of the total leakage amount U, the open leakage amount W, and the first seal surface leakage amount V be realized, but also the measurement of the total leakage amount U1 on the first side, the total leakage amount U2 on the second side, the open leakage amount W1 on the first side, the open leakage amount W2 on the second side, the seal surface leakage amount V1 on the first side, and the seal surface leakage amount V2 on the second side can be realized, and the distribution of the total leakage amount U, the open leakage amount W, and the first seal surface leakage amount V on both axial sides can be clarified, which is beneficial to more comprehensively and detailedly understand and study the leakage situation of the squeeze film damper 200.

[0111] In addition, in order to obtain more accurate open leakage amount W and first seal surface leakage amount V, refer to Figures 8-10 , in some embodiments, not only the oil injection hole 41 is provided on the outer ring 4, but also the positioning hole 42 communicated with the oil film cavity 106 is provided, and the measuring device 100 not only includes the supporting device 101, the damper 102, and the oil receiving device 105, but also includes the pressing member 104.

[0112] Among them, the positioning hole 42 is specifically provided on the outer cylinder 45 of the outer ring 4. Each piston ring 6 corresponds to a positioning hole 42. For example, in combination withFigure 8 and Figure 9 It can be seen that in some embodiments, two sets of positioning holes 42 are provided on the outer ring 4. The two sets of positioning holes 42 correspond to the two piston rings 6 respectively, that is, each piston ring 6 corresponds to a set of positioning holes 42. Each set of positioning holes 42 includes two or more positioning holes 42 evenly distributed along the circumferential direction. In this way, each piston ring 6 corresponds to at least two positioning holes 42 evenly distributed along the circumferential direction.

[0113] The positioning holes 42 are mainly provided to cooperate with the extrusion member 104 to simulate the oil pressure effect during the operation of the squeeze film damper 200, so that when injecting glue into the glue injection channel 73, the piston ring 6 can be closely attached to the side wall of the groove 43 close to the glue injection channel 73 as in the working state, so that during the subsequent oil injection test process, it can be closer to the actual working condition of the squeeze film damper 200 and obtain a more accurate measurement result of the opening leakage amount.

[0114] Figure 9 and Figure 10 shows the simulation effect of the extrusion member 104 on the oil pressure effect. Refer to Figure 9 and Figure 10 , the extrusion member 104 passes through the positioning holes 42 and squeezes the piston ring 6 against the side wall of the groove 43 close to the glue injection channel 73. The side wall of the groove 43 close to the glue injection channel 73 is the side wall of the groove 43 on the axially outer side. It can be seen from Figure 10 that under the action of the extrusion member 104, the piston ring 6 is pressed against the side wall of the groove 43 on the axially outer side. In Figure 10 , it is that the piston ring 6 is pressed against the right side wall of the groove 43. Combining Figure 3 it can be seen that the side pressure effect of the extrusion member 104 on the piston ring 6 is similar to the side pressure effect exerted by the oil on the axially outer side during the operation of the squeeze film damper 200, and can make the piston ring 6 closely attached to the side wall of the groove 43 on the axially outer side.

[0115] In the case where the positioning holes 42 and the extrusion member 104 are provided, first as shown in Figure 10 , before injecting glue into the glue injection channel 73, the extrusion member 104 is inserted into the oil film cavity 106 through the positioning holes 42 first, so that the extrusion member 104 is located on the side of the piston ring 6 away from the glue injection channel 73 (for the piston ring 6 on the right side in Figure 9 , it is located on the left side of the piston ring 6), and the piston ring 6 is pushed axially outward, so that the piston ring 6 is closely attached to the side wall of the groove 43 close to the glue injection channel 73 as when it is under the side pressure effect of the oil in the working state. Then, as shown in Figure 10 , glue is injected into the glue injection channel 73 to block the glue injection channel 73. Combining Figure 9 and 10It can be seen that in this method where the extruding member 104 is first inserted for side pressing and then glue is applied, when injecting glue, although oil has not yet been injected into the oil film cavity 106 through the oil injection hole 41 and the piston ring 6 is not yet under the side pressure of the oil as in the working state, under the extrusion of the extruding member 104, the piston ring 6 has already been pressed against the side wall of the groove 43 close to the glue injection channel 73, forming a second sealing surface 63 that is tightly sealed and basically consistent with the working state. Therefore, when injecting glue in this case, on the one hand, it can prevent excessive sealant from entering the groove 43, so as to avoid deviation between the position of the piston ring 6 during the test process and Figure 3 the position of the piston ring 6 in the actual working process shown, which affects the accuracy of the test results. On the other hand, the injected glue can fix the piston ring 6 at the position close to the side wall of the groove 43 close to the glue injection channel 73, facilitating the stable retention of the piston ring 6 at the position close to the side wall of the groove 43 close to the glue injection channel 73 during the test process, so that the actual working state can be more accurately simulated during the measurement of the opening leakage volume V. It can be understood that if the piston ring 6 is not laterally extruded by the extruding member 104 during glue injection, referring to Figure 10 , the injected sealant will push the piston ring 6 away from the glue injection channel 73, and more sealant will be injected into the groove 43 and accumulate in the space between the piston ring 6 and the side wall of the groove 43 close to the glue injection channel 73, resulting in the piston ring 6 being unable to be pressed tightly against the side wall of the groove 43 close to the glue injection channel 73. Even after subsequent oil passage, due to the presence of the accumulated sealant, it is difficult for the oil to force the piston ring 6 to reach the Figure 3 and Figure 10 shown positions, that is to say, during the test process, the piston ring 6 may be difficult to maintain at the Figure 3 shown position in the actual working state, resulting in deviation between the measurement process of the opening leakage volume W and the actual working conditions and affecting the accuracy of the measurement result of the opening leakage volume W.

[0116] It can be seen that by setting the positioning hole 42 and the extruding member 104, during the measurement of the opening leakage volume W, side pressing is first performed and then glue is injected, which is beneficial to achieving a more realistic mode of the actual working state of the squeeze film damper 200 and obtaining a more accurate measurement result of the opening leakage volume W. Since the leakage volume V of the first sealing surface is determined based on the measured opening leakage volume W, accurate measurement of the opening leakage volume W is also beneficial to improving the accuracy of the measurement result of the leakage volume V of the first sealing surface.

[0117] The advantage of providing at least two positioning holes 42 for each piston ring 6 is that at least two pressing members 104 can be used to laterally press the same piston ring 6 at different circumferential positions, so that the entire piston ring 6 can be closely attached to the side wall of the groove 43 close to the glue injection channel 73. Since the gap into which the pressing member 104 is inserted is actually relatively small, perhaps only about 0.1 mm, after the pressing member 104 is inserted, it can be fixed under the action of friction and maintain the lateral pressure on the piston ring 6 until the pressing member 104 is pulled out.

[0118] Among them, as Figure 9 and Figure 10 shown, in some embodiments, the pressing member 104 is a needle 71. The needle 71 is relatively thin and is convenient to insert into the inner side of the piston ring 6 close to the axial direction to apply a lateral pressure on the piston ring 6 towards the axial outer side. Moreover, the needle 71 has the characteristic of gradually becoming thicker from the bottom end to the top end. When inserted, the bottom end of the needle 71 is located radially inside the top end, so that the characteristic that the needle 71 gradually becomes thicker from the radially inner side to the radially outer side can be used to more reliably press the piston ring 6 against the side wall of the groove 43 close to the glue injection channel 73.

[0119] Since during the measurement process after oil injection, it is not expected that the leakage at the positioning hole 42 will affect the accuracy of the measurement result, therefore, in the case where the positioning hole 42 is provided, the measuring device 100 further includes a plugging member (not shown in the figure). The plugging member plugs the positioning hole 42. And the plugging member is detachably connected to the positioning hole 42. For example, in some embodiments, the positioning hole 42 is configured as a threaded hole, and the plugging member is a threaded connecting member such as a screw, and the plugging member is threadedly connected to the positioning hole 42 to achieve the detachable connection between the two. When the plugging member is connected to the positioning hole 42, the plugging member plugs the positioning hole 42. When the plugging member is not connected to the positioning hole 42, the plugging member does not plug the positioning hole 42. When measuring the leakage amount during oil injection, the plugging member plugs the positioning hole 42. And when the pressing member 104 presses the piston ring 6, the plugging member does not plug the positioning hole 42. That is to say, the plugging member and the pressing member 104 are alternately connected to the positioning hole 42. The pressing member 104 passes through the positioning hole 42 to press the piston ring 6 when the plugging member does not plug the positioning hole 42.

[0120] It can be seen that by providing the positioning hole 42, the pressing member 104 and the plugging member, it is beneficial to further improve the accuracy of the measurement result.

[0121] In addition, in order to improve the measurement accuracy, referring to Figure 6 , in some embodiments, at least one axial end of the outer ring 4 is provided with an oil baffle 8. For example, in Figure 6 , one oil baffle 8 is provided at each of the axial ends of the outer ring 4. The oil baffle 8 inclines downward and towards the axial outer side of the damper 102 to guide the oil leaked from the damper 102 into the oil receiving device 105.

[0122] The provided oil baffle 8 can guide the oil fluid to flow downward into the oil collecting device 105, preventing the oil fluid from splashing. Therefore, it can make the amount of oil fluid collected by the oil collecting device 105 more consistent with the actual leakage amount of the damper 102, which is conducive to improving the accuracy of the measurement results.

[0123] Among them, the oil baffle 8 can be detachably connected to the outer ring 4. In this way, not only can the anti-splash and diversion function of the leaked oil fluid be achieved by installing the oil baffle 8 during the oil injection and measurement process, but also, before the oil injection and measurement, for example, before the glue injection work is completed, the oil baffle 8 can not be installed first to avoid affecting the smooth progress of the glue injection work due to the obstruction of the oil baffle 8. Or, after the measurement is completed and when the glue needs to be cleaned, the oil baffle 8 can be removed first to facilitate the smoother and more thorough cleaning of the glue.

[0124] As an implementation manner of the support device 10 in the foregoing embodiments, refer to Figures 5-6 , in some embodiments, the support device 101 includes a base 1, a first support 2, and a second support 3. The first support 2 and the second support 3 are both connected to the base 1. The first support 2 is located radially outside the second support 3. The first support 2 is connected to the outer ring 4. The second support 3 is connected to the inner ring 5. At this time, the support device 101 is connected to the damper 102 through the first support 2 and the second support 3 to realize the support of the damper 102.

[0125] Among them, as Figure 5 and Figure 6 shown, the base 1 includes a first vertical plate 11, a second vertical plate 12, and a bottom plate 13. The first vertical plate 11 and the second vertical plate 12 are arranged at intervals along the axial direction of the damper 102. The bottom plate 13 is connected to the bottom ends of the first vertical plate 11 and the second vertical plate 12. The first support 2 is connected to the first vertical plate 11. The second support 3 is connected to the second vertical plate 12. The oil collecting device 105 is located on the bottom plate 13. Specifically, connection holes 14 are provided on the first vertical plate 11 and the second vertical plate 12, and the first vertical plate 11 and the second vertical plate 12 are respectively detachably connected to the first support 2 and the second support 3 through the connection holes 14, so that the first support 2 and the second support 3 can be disassembled, which is convenient for maintenance.

[0126] As Figure 6As shown, the first support 2 includes a first cylinder 21, a first connecting plate 22, and a second connecting plate 23. The first connecting plate 22 and the second connecting plate 23 are connected to the axial two ends of the first cylinder 21, and extend radially outward and radially inward from the first cylinder 21 respectively. The first connecting plate 22 is connected to the first vertical plate 11 to realize the connection between the first support 2 and the base 1. The second connecting plate 23 is connected to the outer ring 4 to realize the connection between the first support 2 and the outer ring 4. An oil leakage hole 24 is provided on the side wall of the first cylinder 21. The oil leakage hole 24 is located below the damper 102, so that the oil leaked from the side of the damper 102 close to the first vertical plate 11 can fall into the oil receiving device 105 through the oil leakage hole 24. Specifically, as Figure 6 shown, in this embodiment, the outer ring 4 includes, in addition to the outer cylinder 45, a first vertical plate 46. The first vertical plate 46 extends radially outward from the outer cylinder 45. The outer ring 4 is connected to the second connecting plate 23 through the first vertical plate 46. More specifically, a positioning port 44 is provided on the first vertical plate 46. The second connecting plate 23 is stuck at the positioning port 44, and the outer ring 4 and the first support 2 are detachably connected by a connecting piece passing through the connecting hole 14 provided at the overlapping part of the two. Among them, the first vertical plate 46 is connected to the middle of the axial direction of the outer cylinder 45. The first vertical plate 46, the first connecting plate 22, and the second connecting plate 23 are all annular plate members.

[0127] Continue to refer to Figure 6 , the second support 3 includes a second cylinder 31, a third connecting plate 32, and a fourth connecting plate 33. The third connecting plate 32 and the fourth connecting plate 33 are connected to the axial two ends of the second cylinder 31, and both extend radially outward from the first cylinder 21. The third connecting plate 32 is connected to the inner ring 5 to realize the connection between the second support 3 and the inner ring 5. The fourth connecting plate 33 is connected to the second vertical plate 12 to realize the connection between the second support 3 and the base 1. Specifically, as Figure 6 shown, in this embodiment, the inner ring 5 includes, in addition to the inner cylinder 51, a second vertical plate 52. The second vertical plate 52 extends radially inward from the inner cylinder 51. The inner ring 5 is connected to the third connecting plate 32 through the second vertical plate 52. More specifically, a positioning port 44 is provided on the second vertical plate 52. The third connecting plate 32 is stuck at the positioning port 44, and the inner ring 5 and the second support 3 are detachably connected by a connecting piece passing through the connecting hole 14 provided at the overlapping part of the two. Among them, the second vertical plate 52 is connected to the middle of the axial direction of the inner cylinder 51. The second vertical plate 52, the third connecting plate 32, and the fourth connecting plate 33 are all annular plate members.

[0128] Based on the above settings, the support device 101 can stably support the damper 102 and the oil receiving device 105, and has a simple structure, a compact layout, and is convenient for disassembly and assembly.

[0129] The outer ring 4 and the inner ring 5 are set to be detachably connected to the first support 2 and the second support 3 respectively, so that the damper 102 is detachably connected to the support device 101. The advantage of this setting is that when it is necessary to test squeeze film dampers 200 of different specifications, only the damper 102 of the corresponding specification needs to be replaced, which is simple and convenient. As Figure 11 and Figure 12 shown, the different specifications of the squeeze film damper 200d mainly refer to the different diameters of the oil film chamber 106. When it is necessary to measure the leakage of the squeeze film damper 200 with different diameters of the oil film chamber 106, only the damper 102 with the corresponding diameter of the oil film chamber 106 needs to be replaced. For example, the damper 102 with the diameter D1 of the oil film chamber 106 can be replaced with the damper 102 with the diameter D2 of the oil film chamber 106. During this process, the support device 101 does not need to be replaced.

[0130] It can be seen that setting the damper 102 and the support device 101 to be detachably connected facilitates the measurement of the leakage of oil film chambers 106 with different radial dimensions based on the same support device 101.

[0131] Based on the above, it can be known that the measuring device 100 provided by the embodiment of the present invention has a simple structure, can measure the leakage of oil film chambers 106 with different diameters, and for each oil film chamber 106 with a certain diameter, it can measure the total leakage U, the opening leakage W, the leakage V of the first sealing surface, and the leakage on both axial sides.

[0132] Based on the measuring device 100 of the foregoing embodiments, the embodiment of the present invention further provides a measuring method, which includes:

[0133] Using the measuring device 100 to measure the total leakage U of the damper 102; and / or,

[0134] Using the measuring device 100 to measure the opening leakage W of the damper 102.

[0135] Among them, using the measuring device 100 to measure the total leakage U of the damper 102 includes:

[0136] When the injection channel 73 is not blocked by injection glue, inject oil into the oil film chamber 106 through the oil injection hole 41, and conduct tests under preset conditions, and measure the amount of oil collected by the oil receiving device 105 per unit time as the total leakage U.

[0137] Among them, measuring the amount of oil collected by the oil receiving device 105 per unit time as the total leakage U includes:

[0138] Measure the amount of oil collected by the first container 91 and the second container 92 of the oil receiving device 105 within a unit time. Take the amount of oil collected by the first container 91 within a unit time as the total leakage amount U1 on the first side, take the amount of oil collected by the second container 92 within a unit time as the total leakage amount U2 on the second side, and take the sum of the total leakage amount U1 on the first side and the total leakage amount U2 on the second side as the total leakage amount U.

[0139] In addition, in the embodiment provided with the positioning hole 42, measuring the total leakage amount U by the measuring device 100 further includes:

[0140] Before injecting oil into the oil film cavity 106 through the oil injection hole 41, block the positioning hole 42 with a blocking member.

[0141] Since there is no need to inject sealant during the process of measuring the total leakage amount U, and there is no problem that the sealant affects the position of the piston ring 6. Therefore, in the case where the positioning hole 42 is provided on the outer ring 4, even without using the pressing member 104 for pressing, the piston ring 6 can reach the Figure 3 shown state after oil injection, that is, reach the state during normal operation. Therefore, there is no need to use the pressing member 104 for pressing, and the accurate measurement of the total leakage amount U can be achieved. The measured total leakage amount is equal to the sum of the leakage amount V of the first sealing surface and the leakage amount W of the opening.

[0142] And measuring the leakage amount W of the opening of the damper 102 by the measuring device 100 includes:

[0143] Inject sealant into the sealant injection channel 73 to block the sealant injection channel 73; and

[0144] Inject oil into the oil film cavity 106 through the oil injection hole 41 and conduct a test under preset conditions, and measure the amount of oil collected by the oil receiving device 105 within a unit time as the leakage amount W of the opening.

[0145] Among them, in some embodiments, measuring the amount of oil collected by the oil receiving device 105 within a unit time as the leakage amount W of the opening includes:

[0146] Measure the amount of oil collected by the first container 91 and the second container 92 of the oil receiving device 105 between units. Take the amount of oil collected by the first container 91 within a unit time as the leakage amount W1 on the first side of the opening, take the amount of oil collected by the second container 92 within a unit time as the leakage amount W2 on the second side of the opening, and take the sum of the leakage amount W1 on the first side of the opening and the leakage amount W2 on the second side of the opening as the leakage amount W of the opening.

[0147] In addition, in the embodiment provided with the positioning hole 42, measuring the leakage amount W of the opening by the measuring device 100 further includes:

[0148] Before injecting the sealant into the sealant injection channel 73, pass the extrusion member 104 through the positioning hole 42 to press the piston ring 6 against the side wall of the groove 43 close to the sealant injection channel 73; and

[0149] After blocking the sealant injection channel 73 and before injecting the oil into the oil film cavity 106 through the oil injection hole 41, remove the extrusion member 104 and block the positioning hole 42 with a blocking member.

[0150] In some embodiments, after measuring the opening leakage amount W, clean the sealant in the sealant injection channel 73.

[0151] In the foregoing embodiments, for the measuring device 100 including the oil baffle 8, the oil baffle 8 of the measuring device 100 can be installed on the outer ring 4 before conducting the test under preset conditions.

[0152] According to different requirements, only one of the total leakage amount U and the opening leakage amount W can be measured, or both the total leakage amount U and the opening leakage amount W can be measured. For example, in some embodiments, the measuring method includes:

[0153] Measure the total leakage amount U and the opening leakage amount W; and

[0154] Take the difference between the measured total leakage amount U and the opening leakage amount W as the first sealing surface leakage amount V.

[0155] Among them, taking the difference between the measured total leakage amount U and the opening leakage amount W as the first sealing surface leakage amount V includes:

[0156] Take the difference between the measured total leakage amount U1 on the first side and the opening leakage amount W1 on the first side as the first side sealing surface leakage amount V1, take the difference between the total leakage amount U2 on the second side and the opening leakage amount W2 on the second side as the second side sealing surface leakage amount V2, and take the sum of the first side sealing surface leakage amount V1 and the second side sealing surface leakage amount V2 as the first sealing surface leakage amount V.

[0157] When measuring the total leakage amount U and the opening leakage amount W, the total leakage amount U can be measured first and then the opening leakage amount W to reduce the influence of sealant injection on the measurement result of the total leakage amount U.

[0158] For example, for Figures 5-10 the measuring device 100 shown in the embodiment, the measuring process can be as follows:

[0159] (1) Measuring the total leakage U: First, install the damper 102 with the same key parameters as the squeeze film damper 200 to be measured on the support device 101. Then, block the positioning hole 42 with a plugging member, connect the oil supply pipe (not shown in the figure) to the oil injection hole 41, inject oil into the oil film cavity 106, and install the oil baffle 8 (the oil baffle 8 can be installed near the opening 61). After that, under the preset conditions such as the specified oil supply temperature and oil supply pressure, conduct a leakage measurement test, and record the amount of oil collected by the oil receiving device 105 per unit time as the total leakage U. During this process, the amount of oil collected in the first container 91 and the second container 92 can be recorded separately as the total leakage U1 on the first side and the total leakage U2 on the second side;

[0160] (2) Measuring the opening leakage W: With the oil baffle 8 removed, insert the needle 71 into the positioning hole 42 to simulate the oil pressure effect in the working state, so that the piston ring 6 is closely attached to the side wall of the groove 43 near the glue injection channel 73. Then, inject glue into the annular glue injection channel 73 to block the gap along the circumferential direction, so that no leakage can occur at the first sealing surface 62. During this process, no glue is applied to the opening 61. After that, wait for the sealant to cure, remove the needle 71, use a plugging member to block the positioning hole 42, connect the oil supply pipe to the oil injection hole 41, inject oil, and install the oil baffle 8 (the oil baffle 8 can be installed near the opening 61). Then, conduct a test under the specified oil supply temperature and oil supply pressure, and record the amount of oil collected by the oil receiving device 105 per unit time as the opening leakage W. During this process, the amount of oil collected in the first container 91 and the second container 92 can be recorded separately as the opening leakage W1 on the first side and the opening leakage W2 on the second side. After completing the measurement of the opening leakage W, remove the damper 102 and the oil baffle 8 and remove the sealant;

[0161] (3) Determining the leakage V of the first sealing surface: The leakage V of the first sealing surface = total leakage U - opening leakage W (if the leakage amounts on both axial sides are recorded separately before, the leakage amounts at the first sealing surfaces 62 of the two piston rings 6 arranged axially at intervals can be determined as U1 - W1 and U2 - W2 respectively).

[0162] During the process of measuring the leakage of the squeeze film damper 200 using the measuring device 100, the damper 102 can not rotate to simplify the measurement process. At this time, a static measurement process is realized.

[0163] The above are only exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A measuring device (100), characterized in that, Comprising: A support device (101); A damper (102), installed on the support device (101), and including an outer ring (4), an inner ring (5) and two piston rings (6). The outer ring (4) is sleeved outside the inner ring (5). Two axially spaced grooves (43) are provided on the outer wall of the inner ring (5). The two piston rings (6) are respectively arranged in the two grooves (43), and together with the inner ring (5) and the outer ring (4) enclose an oil film cavity (106). An oil injection hole (41) communicating with the oil film cavity (106) is provided on the outer ring (4). The piston ring (6) has two free ends with an opening (61) therebetween. A glue injection channel (73) is provided on the axial side of the piston ring (6) away from the other piston ring (6). When the glue injection channel (73) is blocked by a sealant, it prevents the leakage of oil fluid through the gap between the piston ring (6) and the inner wall of the outer ring (4); and An oil receiving device (105), arranged below the damper (102), for collecting the oil fluid leaked from the damper (102).

2. The measuring device (100) according to claim 1, characterized in that, A positioning hole (42) is provided on the outer ring (4), the positioning hole (42) communicates with the oil film cavity (106), and the measuring device (100) further includes: A plugging member, plugging the positioning hole (42) and detachably connected to the positioning hole (42); and An extrusion member (104), when the plugging member does not plug the positioning hole (42), passing through the positioning hole (42) to extrude the piston ring (6) against the side wall of the groove (43) close to the glue injection channel (73).

3. The measuring device (100) according to claim 1, characterized in that, At least one axial end of the outer ring (4) is provided with an oil baffle (8), the oil baffle (8) faces downward and is inclined axially outward of the damper (102) to guide the oil fluid leaked from the damper (102) into the oil receiving device (105).

4. The measuring device (100) according to claim 3, characterized in that, The oil baffle (8) is detachably connected to the outer ring (4).

5. The measuring device (100) according to claim 1, characterized in that, The oil receiving device (105) includes a first container (91) and a second container (92), the first container (91) and the second container (92) are arranged side by side along the axis of the damper (102) for receiving the oil fluid leaking from both axial sides of the damper (102).

6. The measuring device (100) according to claim 1, characterized in that, The damper (102) is detachably connected to the support device (101).

7. The measuring device (100) according to any one of claims 1-5, characterized in that, The support device (101) includes a base (1), a first support (2) and a second support (3). Both the first support (2) and the second support (3) are connected to the base (1). The first support (2) is located radially outside the second support (3). The first support (2) is connected to the outer ring (4), and the second support (3) is connected to the inner ring (5).

8. The measuring device (100) according to claim 7, characterized in that, The base (1) includes a first vertical plate (11), a second vertical plate (12) and a bottom plate (13). The first vertical plate (11) and the second vertical plate (12) are arranged at intervals along the axial direction of the damper (102). The bottom plate (13) is connected to the bottom ends of the first vertical plate (11) and the second vertical plate (12). The first support (2) is connected to the first vertical plate (11), the second support (3) is connected to the second vertical plate (12), and the oil receiving device (105) is located on the bottom plate (13).

9. The measuring device (100) according to claim 8, characterized in that, The first support (2) includes a first cylinder (21), a first connecting plate (22) and a second connecting plate (23). The first connecting plate (22) and the second connecting plate (23) are connected to the two axial ends of the first cylinder (21), and extend radially outward and radially inward from the first cylinder (21) respectively. The first connecting plate (22) is connected to the first vertical plate (11), the second connecting plate (23) is connected to the outer ring (4), and an oil leakage hole (24) is provided on the side wall of the first cylinder (21). The oil leakage hole (24) is located below the damper (102).

10. The measuring device (100) according to claim 9, characterized in that, The second support (3) includes a second cylinder (31), a third connecting plate (32) and a fourth connecting plate (33). The third connecting plate (32) and the fourth connecting plate (33) are connected to the two axial ends of the second cylinder (31), and both extend radially outward from the first cylinder (21). The third connecting plate (32) is connected to the inner ring (5), and the fourth connecting plate (33) is connected to the second vertical plate (12).

11. A measurement method based on the measurement device (100) according to any one of claims 1-10, characterized in that, Comprising: Measuring the total leakage amount U of the damper (102) by using the measuring device (100), including: When the injection channel (73) is not blocked by injection glue, injecting oil into the oil film cavity (106) through the oil injection hole (41), and conducting a test under preset conditions to measure the amount of oil collected by the oil receiving device (105) per unit time as the total leakage amount U. The total leakage amount U includes the leakage amounts of the damper (102) at the first sealing surface (62) and the opening (61) per unit time. The first sealing surface (62) is the sealing surface between the piston ring (6) and the inner wall of the outer ring (4); and / or, Measuring the opening leakage amount W of the damper (102) by using the measuring device (100), including: Injecting sealing glue into the injection channel (73) to block the injection channel (73); and Injecting oil into the oil film cavity (106) through the oil injection hole (41), and conducting a test under preset conditions to measure the amount of oil collected by the oil receiving device (105) per unit time as the opening leakage amount W. The opening leakage amount W is the leakage amount of the damper (102) at the opening (61) per unit time.

12. The measuring method according to claim 11, characterized in that, The step of measuring the total leakage amount U of the damper (102) by using the measuring device (100) further includes: Before injecting oil into the oil film cavity (106) through the oil injection hole (41), the positioning hole (42) is blocked by the blocking member.

13. The measurement method according to claim 11, characterized in that Measuring the amount of oil collected by the oil receiving device (105) per unit time, the total leakage amount U includes: Measuring the amount of oil collected by the first container (91) and the second container (92) of the oil receiving device (105) per unit time. Taking the amount of oil collected by the first container (91) per unit time as the total leakage amount U1 on the first side, taking the amount of oil collected by the second container (92) per unit time as the total leakage amount U2 on the second side, and taking the sum of the total leakage amount U1 on the first side and the total leakage amount U2 on the second side as the total leakage amount U.

14. The measurement method according to claim 11, characterized in that The method of using the measuring device (100) to measure the opening leakage amount W of the damper (102) further includes: Before injecting sealant into the sealant injection channel (73), the pressing member (104) is passed through the positioning hole (42), and the piston ring (6) is pressed against the side wall of the groove (43) close to the sealant injection channel (73); and After blocking the sealant injection channel (73) and before injecting oil into the oil film cavity (106) through the oil injection hole (41), the pressing member (104) is removed, and the positioning hole (42) is blocked by the blocking member.

15. The measurement method according to claim 14, characterized in that, The measuring method further includes: After completing the measurement of the opening leakage amount W, the sealant in the sealant injection channel (73) is removed.

16. The measuring method according to claim 11, characterized in that, Measuring the amount of oil collected by the oil receiving device (105) per unit time, the opening leakage amount W includes: Measuring the amount of oil collected by the first container (91) and the second container (92) of the oil receiving device (105) between units of time. Taking the amount of oil collected by the first container (91) per unit time as the opening leakage amount W1 on the first side, taking the amount of oil collected by the second container (92) per unit time as the opening leakage amount W2 on the second side, and taking the sum of the opening leakage amount W1 on the first side and the opening leakage amount W2 on the second side as the opening leakage amount W.

17. The measuring method according to claim 11, wherein Before conducting the test under preset conditions, the oil baffle (8) of the measuring device (100) is installed on the outer ring (4).

18. The measuring method according to any one of claims 11-17, characterized in that, Including: Measuring the total leakage amount U and the opening leakage amount W; and Taking the difference between the measured total leakage amount U and the opening leakage amount W as the first seal surface leakage amount V, and the first seal surface leakage amount V is the leakage amount of the damper (102) at the first seal surface (62) per unit time.

19. The measuring method according to claim 18, characterized in that, Taking the difference between the measured total leakage amount U and the opening leakage amount W as the first seal surface leakage amount V includes: Taking the difference between the measured total leakage amount U1 on the first side and the opening leakage amount W1 on the first side as the first side seal surface leakage amount V1, taking the difference between the total leakage amount U2 on the second side and the opening leakage amount W2 on the second side as the second side seal surface leakage amount V2, and taking the sum of the first side seal surface leakage amount V1 and the second side seal surface leakage amount V2 as the first seal surface leakage amount V.

20. The measuring method according to claim 18, characterized in that When measuring the total leakage amount U and the opening leakage amount W, first measure the total leakage amount U, and then measure the opening leakage amount W.

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