Mechanical seal testing device

Abstract

The embodiment of the utility model relates to the technical field of mechanical seal detection, in particular to a mechanical seal testing device which is used for testing the performance of a tested mechanical seal and is characterized by comprising a shell, a rotary driving part, a rotary shaft and a pressurizing part. The shell is provided with a first inner cavity, a second inner cavity and a liquid outlet. The rotary driving piece is connected to one end of the shell. One end of the rotating shaft is connected with the rotating driving piece, the rotating driving piece can drive the rotating shaft to rotate relative to the shell, the other end of the rotating shaft penetrates through the first inner cavity and extends to the second inner cavity, and the rotating shaft is used for connecting a tested mechanical seal isolating the first inner cavity and the second inner cavity. The pressurizing member is connected to the housing. The first inner cavity is communicated with the liquid outlet, the second inner cavity is used for containing liquid, or the first inner cavity is communicated with the pressurizing piece and used for containing liquid, and the second inner cavity is communicated with the liquid outlet. By means of the structure, whether the mechanical seal meets the technological requirements in the two directions or not is known.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of mechanical seal detection, and in particular to a mechanical seal testing device. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by at least one pair of end faces perpendicular to the axis of rotation, which remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

[0003] In the process of realizing the present application, the inventor of the present application found that: currently, the device for testing mechanical seals includes: a frame, a housing, a driver and an injector, the housing is installed on the frame, the housing is provided with an injection port and a liquid outlet, by installing the shaft to be tested in the housing, the driver drives the shaft to be tested to rotate, and the injector injects liquid into the injection port, so as to judge whether the mechanical seal meets the requirements from the liquid output of the liquid outlet, but currently this device can only test the positive pressure, and cannot test the reverse pressure. Utility Model Content

[0004] The embodiments of the present application provide a mechanical seal testing device and a testing system, which can improve the current situation where such devices can only test positive pressure but cannot test reverse pressure.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a mechanical seal test device for testing the performance of the tested mechanical seal, characterized in that the mechanical seal test device comprises: a housing, a rotary drive member, a rotating shaft and a pressurizing member. The housing is provided with a first inner cavity and a second inner cavity in sequence, and the housing is also provided with a liquid outlet. The rotary drive member is connected to one end of the housing. One end of the rotating shaft is connected to the rotary drive member, and the rotary drive member can drive the rotating shaft to rotate relative to the housing. The other end of the rotating shaft passes through the first inner cavity and extends to the second inner cavity, and the rotating shaft is used to connect the tested mechanical seal that isolates the first inner cavity and the second inner cavity. The pressurizing member is connected to the housing. The first inner cavity is communicated with the liquid outlet, the second inner cavity is communicated with the pressurizing member, and the second inner cavity is used to contain liquid, or the first inner cavity is communicated with the pressurizing member, and the first inner cavity is used to contain liquid, and the second inner cavity is communicated with the liquid outlet.

[0006] Optionally, the housing includes a first joint, a shell, and a second joint connected in sequence. The rotary drive member is connected to an end of the first joint away from the shell, and the rotary shaft is rotatably connected to the first joint and the second joint. The first joint, the shell, and the second joint enclose the first inner cavity, and the second inner cavity is provided at an end of the second joint away from the shell.

[0007] Optionally, one end of the shell is sleeved outside the first joint, and a sealing ring is provided between the shell and the first joint; and / or the other end of the shell is sleeved outside the second joint, and a sealing ring is provided between the shell and the second joint.

[0008] Optionally, a first bearing is provided between the first joint and the rotating shaft; and / or a second bearing is provided between the second joint and the rotating shaft.

[0009] Optionally, the first connector is provided with a pressurizing channel communicating with the first inner cavity, the pressurizing member is connected to the first connector and communicates with the pressurizing channel, and the liquid outlet is provided at the second connector and communicates with the second inner cavity.

[0010] Optionally, the housing further comprises a sealing end cover, the sealing end cover is connected to an end of the second joint away from the housing, and the sealing end cover is provided with a pressurizing hole communicating with the second inner cavity. The pressurizing member is connected to the sealing end cover and communicated with the pressurizing hole, and the liquid outlet is provided at the second joint and communicated with the first inner cavity.

[0011] Optionally, the housing further includes a third joint, the shell includes a first shell and a second shell connected to both ends of the third joint, an end of the first shell facing away from the third joint is connected to the first joint, and an end of the second shell facing away from the third joint is connected to the second joint. The first joint, the first shell, the third joint, the second shell and the second joint together form the first inner cavity, and the rotating shaft is rotatably connected to the third joint.

[0012] Optionally, the third joint is provided with a pressurizing channel communicating with the first inner cavity, the pressurizing member is connected to the third joint and communicated with the pressurizing channel, and the liquid outlet is provided at the second joint and communicated with the second inner cavity.

[0013] Optionally, the shell is further provided with an exhaust port, and the exhaust port is communicated with the first inner cavity or the second inner cavity.

[0014] Optionally, the pressurizing member includes a pressurizing interface and a pressure gauge connected to each other. The pressurizing interface is in communication with the first inner cavity or the second inner cavity, and the pressure gauge is used to detect the pressure in the first inner cavity or the second inner cavity.

[0015] The beneficial effect of the embodiment of the present application is that: different from the prior art, the embodiment of the present application provides a mechanical seal test device for testing the performance of the tested mechanical seal, characterized in that the mechanical seal test device comprises: a housing, a rotary drive member, a rotary shaft and a pressurizing member. The housing is provided with a first inner cavity and a second inner cavity in sequence, and the housing is also provided with a liquid outlet. The rotary drive member is connected to one end of the housing. One end of the rotary shaft is connected to the rotary drive member, and the rotary drive member can drive the rotary shaft to rotate relative to the housing, and the other end of the rotary shaft passes through the first inner cavity and extends to the second inner cavity, and the rotary shaft is used to connect the tested mechanical seal that isolates the first inner cavity and the second inner cavity. The pressurizing member is connected to the housing. The first inner cavity is communicated with the liquid outlet, the second inner cavity is communicated with the pressurizing member, and the second inner cavity is used to contain liquid, or the first inner cavity is communicated with the pressurizing member, and the first inner cavity is used to contain liquid, and the second inner cavity is communicated with the liquid outlet. Through the above structure, when the first inner cavity or the second inner cavity contains liquid, the liquid at the liquid outlet can be collected and measured to determine whether the mechanical seal meets the process requirements in both directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of a mechanical seal testing device provided in one embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of a mechanical seal testing device provided in another embodiment of the present application.

[0019] The reference numerals of Example 1 are as follows:

[0020] Mechanical seal under test 2000 Exhaust port 1180 Mechanical seal test device 1000 Rotating drive 1200 shell 1100 Rotation axis 1300 First inner cavity 1110 Pressurized parts 1400 Second inner cavity 1120 Pressurized interface 1410 Liquid outlet 1130 Pressure gauge 1420 First joint 1140 Sealing ring 1500a Pressurized channel 1141 Sealing ring 1500b case 1150 First bearing 1600 First shell 1151 Second bearing 1700 Second shell 1152 Sealing end cap 1800 Second connector 1160 Pressurized hole 1810

[0021] The reference numerals of Example 2 are as follows:

[0022] shell 1100’ The third connector 1170’ First inner cavity 1110’ Pressurized channel 1171’ Second inner cavity 1120’ Exhaust port 1180’ Liquid outlet 1130’ Rotating drive 1200’ First joint 1140’ Rotation axis 1300’ case 1150’ Pressurized parts 1400’ First shell 1151’ Pressurized interface 1410’ Second shell 1152’ Pressure gauge 1420’ Second connector 1160’ Mechanical seal under test 2000 DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0025] Example 1

[0026] See also Figure 1 One embodiment of the present application provides a mechanical seal test device 1000 for testing the performance of a mechanical seal 2000 under test. The mechanical seal test device 1000 includes a housing 1100, a rotary drive member 1200, a rotary shaft 1300, and a pressurizing member 1400. The rotary drive member 1200 is connected to one end of the housing 1100, the rotary shaft 1300 is disposed in the housing 1100, and one end of the rotary shaft 1300 is connected to the rotary drive member 1200, the rotary drive member 1200 can drive the rotary shaft 1300 to rotate relative to the housing 1100, and the pressurizing member 1400 is connected to the housing 1100 and communicates with the interior of the housing 1100.

[0027] The housing 1100 is provided with a first inner cavity 1110 and a second inner cavity 1120 in sequence, and the housing 1100 is also provided with a liquid outlet 1130. The other end of the rotating shaft 1300 passes through the first inner cavity 1110 and extends to the second inner cavity 1120, and the rotating shaft 1300 is used to connect the tested mechanical seal 2000 that isolates the first inner cavity 1110 and the second inner cavity 1120. Specifically, the tested mechanical seal 2000 is sleeved outside the rotating shaft 1300, and the tested mechanical seal 2000 is arranged in the second inner cavity 1120, and the tested mechanical seal 2000 is sealed and connected to the cavity wall of the second inner cavity 1120 facing the first inner cavity 1110, so that the first inner cavity 1110 and the second inner cavity 1120 are isolated from each other.

[0028] The first inner cavity 1110 is communicated with the liquid outlet 1130, and the second inner cavity 1120 is communicated with the pressurizing member 1400, and the second inner cavity 1120 is used to contain liquid. Through the above structure, when the pressurizing member 1400 pressurizes the second inner cavity 1120, it is possible to collect and measure the liquid at the liquid outlet 1130 to determine whether the liquid in the second inner cavity 1120 leaks into the first inner cavity 1110, thereby knowing whether the sealing performance of the mechanical seal meets the requirements.

[0029] For the above housing 1100, see Figure 1 , the housing 1100 includes a first joint 1140, a shell 1150 and a second joint 1160 connected in sequence. The rotary drive member 1200 is connected to the end of the first joint 1140 away from the shell 1150, and the rotary shaft 1300 is rotatably connected to the first joint 1140 and the second joint 1160 respectively. The first joint 1140, the shell 1150 and the second joint 1160 are enclosed to form a first inner cavity 1110, and the second joint 1160 is provided with a second inner cavity 1120 at the end away from the shell 1150. The first inner cavity 1110 and the second inner cavity 1120 are separated, and the mechanical seal 2000 to be tested is located between the first inner cavity 1110 and the second inner cavity 1120, so that when the second inner cavity 1120 is filled with liquid and pressurized, the liquid in the chamber will be squeezed toward another chamber through the mechanical seal, thereby testing whether the sealing performance of the mechanical seal is good. It can be understood that the first joint 1140 is used to fix the rotating shaft 1300 and install the rotating driving member 1200 on the first joint 1140, so as to improve the connection strength between the rotating driving member 1200 and the rotating shaft 1300 and prevent the rotating shaft 1300 from shaking during rotation to prevent the transmission efficiency from being reduced.

[0030] Further, one end of the housing 1150 is sleeved outside the first joint 1140, and a sealing ring 1500a is provided between the housing 1150 and the first joint 1140. The other end of the housing 1150 is sleeved outside the second joint 1160, and a sealing ring 1500b is provided between the housing 1150 and the second joint 1160. The sealing ring 1500a is provided to improve the bonding strength between the housing 1150 and the first joint 1140, and the sealing ring 1500b is provided to improve the bonding strength between the housing 1150 and the second joint 1160, to prevent liquid leakage, and to prevent the pressure member 1400 from releasing pressure when pressurizing, thereby affecting the test results.

[0031] Further, a first bearing 1600 is provided between the first joint 1140 and the rotating shaft 1300, and a second bearing 1700 is provided between the second joint 1160 and the rotating shaft 1300. The first bearing 1600 and the second bearing 1700 may be angular contact bearings, deep groove ball bearings, etc., respectively. In some other embodiments, the first bearing 1600 may be a bearing group formed by a plurality of bearings to improve the rotation efficiency between the first joint 1140 and the rotating shaft, and to limit the axial displacement of the rotating shaft 1300 during rotation, so as to prevent the rotating shaft 1300 from loosening and affecting the test results. Preferably, the second bearing 1700 may use a deep groove ball bearing to bear the radial load on the rotating shaft 1300.

[0032] Furthermore, the housing 1100 further includes a sealing end cover 1800, which is connected to the end of the second joint 1160 away from the first housing 1151, and the sealing end cover 1800 is provided with a pressurizing hole 1810 communicating with the second inner cavity 1120. The pressurizing member 1400 is connected to the sealing end cover 1800 and communicates with the pressurizing hole 1810, and the liquid outlet 1130 is provided at the second joint 1160 and communicates with the first inner cavity 1110. It is still necessary to explain that the inner contour of the second joint 1160 is narrow in the middle and wide on both sides. The narrower middle area of ​​the second joint 1160 is convenient for the rotating shaft 1300 to be clamped and passed through, so as to facilitate the fixing of the mechanical seal 2000 to be tested in the second inner cavity 1120, and the second joint 1160 and the rotating shaft 1300 together separate the first inner cavity 1110 and the second inner cavity 1120 on both sides; the wider two side areas of the second joint 1160 facilitate the formation of larger first inner cavity 1110 and second inner cavity 1120, so as to accommodate more liquid for pressure testing. At the second joint 1160, the exhaust port 1180 is arranged at a portion away from the first joint 1140 and communicated with the second inner cavity 1120, so as to facilitate exhaust of the second inner cavity 1120; at the second joint 1160, the liquid outlet 1130 is arranged at a portion away from the first joint 1140 and communicated with the second inner cavity 1120, and the liquid outlet 1130 is arranged close to the mechanical seal 2000 to be tested, and is arranged on the side of the second joint 1160 close to the ground, so as to facilitate direct access to the liquid by utilizing the mechanical property of gravity to make the liquid flow downward. It can be understood that the exhaust port 1180 and the liquid outlet 1130 are staggered along the radial direction of the second joint 1160, so as to prevent the second joint 1160 from having poor force bearing capacity at this place, and to avoid leakage caused by excessive force on one of the exhaust port 1180 and the liquid outlet 1130 during the pressurization of the second inner cavity 1120.

[0033] The pressurizing member 1400 includes a pressurizing interface 1410 and a pressure gauge 1420 connected to each other. The pressurizing interface 1410 is connected to the first inner cavity 1110 or the second inner cavity 1120, and the pressure gauge 1420 is used to detect the pressure in the second inner cavity 1120. It can be understood that the pressurizing member 1400 is mainly used to pressurize the second inner cavity 1120, so after the liquid in the second inner cavity 1120 is injected, other pressurizing media can be replaced. That is, the pressurizing member 1400 can be a pressurizing machine such as an injection pump, an air pump, etc.

[0034] In the embodiment of the present application, the housing 1100 is further provided with an exhaust port 1180, which is connected to the second inner cavity 1120. By utilizing the physical property that the density of gas is smaller than that of liquid and gas will automatically overflow upward, the gas in the second inner cavity 1120 is discharged and the liquid is injected.

[0035] It can be understood that, in some other embodiments, the mechanical seal 2000 to be tested can also be arranged in the first inner cavity 1110, and the mechanical seal 2000 to be tested is sealingly connected to the cavity wall of the first inner cavity 1110 facing the second inner cavity 1120 so that the first inner cavity 1110 and the second inner cavity 1120 are isolated from each other, and the pressurizing hole 1810 is arranged on the second joint 1160 or the shell 1150, and the pressurizing member 1400 is connected with the first inner cavity 1110 through the pressurizing hole 1810, and the interior of the first inner cavity 1110 contains liquid, and the liquid outlet 1130 is arranged on the second joint 1160 and is connected with the second inner cavity 1120, and the pressurizing member 1400 pressurizes the interior of the first inner cavity 1110, and the liquid outlet 1130 collects the leaked liquid to determine whether the liquid in the first inner cavity 1110 has leaked into the second inner cavity 1120.

[0036] Example 2

[0037] Another embodiment of the present application provides a mechanical seal testing device 1000', including a housing 1100', a rotary drive member 1200', a rotary shaft 1300' and a pressurizing member 1400'. The rotary drive member 1200' is connected to one end of the housing 1100', the rotary shaft 1300' is disposed in the housing 1100', and one end of the rotary shaft 1300' is connected to the rotary drive member 1200', the rotary drive member 1200' can drive the rotary shaft 1300' to rotate relative to the housing 1100', and the pressurizing member 1400' is connected to the housing 1100' and communicates with the interior of the housing 1100.

[0038] The first inner cavity 1110' and the second inner cavity 1120' are sequentially provided inside the housing 1100', and the housing 1100' is also provided with a liquid outlet 1130'. The other end of the rotating shaft 1300' passes through the first inner cavity 1110' and extends to the second inner cavity 1120', and the rotating shaft 1300' is used to connect the tested mechanical seal 2000 that isolates the first inner cavity 1110' and the second inner cavity 1120'. Specifically, the tested mechanical seal 2000 is sleeved outside the rotating shaft 1300', and the tested mechanical seal 2000 is arranged in the second inner cavity 1120', and the tested mechanical seal 2000 is sealed and connected to the cavity wall of the second inner cavity 1120' facing the first inner cavity 1110', so that the first inner cavity 1110' and the second inner cavity 1120' are isolated from each other.

[0039] The first inner cavity 1110' is communicated with the liquid outlet 1130', and the first inner cavity 1110' is communicated with the pressurizing member 1400', and the first inner cavity 1110' is used to contain liquid. Through the above structure, when the pressurizing member 1400' pressurizes the first inner cavity 1110', it can collect and measure the liquid at the liquid outlet 1130' to determine whether the liquid in the first inner cavity 1110' leaks into the second inner cavity 1120', thereby knowing whether the sealing performance of the mechanical seal meets the requirements.

[0040] The difference between the housing 1100' in Example 2 of the present application and the housing 1100 in Example 1 is that the housing 1100' further includes a third joint 1170'. The housing 1150' includes a first housing 1151' and a second housing 1152' connected to both ends of the third joint 1170', the end of the first housing 1151' away from the third joint 1170' is connected to the first joint 1140', and the end of the second housing 1152' away from the third joint 1170' is connected to the second joint 1160'. The first joint 1140', the first housing 1151', the third joint 1170', the second housing 1152' and the second joint 1160' enclose a first inner cavity 1110', and the rotating shaft 1300' is rotatably connected to the third joint 1170'. It is necessary to explain that by setting the third joint 1170', on the one hand, an interface for pressurization is added to the third joint 1170' to facilitate the injection of liquid into the first inner cavity 1110'; on the other hand, the first joint 1140', the first shell 1151', the third joint 1170', the second shell 1152' and the second joint 1160' together enclose a closed first inner cavity 1110' to prevent liquid leakage; on the other hand, since the shaft body of the rotating shaft 1300' in this test is relatively long, it is necessary to set the third joint 1170' to provide support for the rotating shaft 1300' and share the load, so as to facilitate the rotation of the rotating shaft 1300' and prevent the shaft portion of the rotating shaft 1300' from bearing too much load.

[0041] Further, the third joint 1170' is provided with a pressurizing channel 1171' communicating with the first inner cavity 1110', the pressurizing member 1400' is connected to the third joint 1170' and communicates with the pressurizing channel 1171', and the liquid outlet 1130' is provided at the second joint 1160' and communicates with the second inner cavity 1120'. The pressurizing channel 1171' is arranged obliquely, and the liquid inlet end of the pressurizing channel 1171' is opposite to the liquid outlet end, and is close to the rotating shaft 1300' in the radial direction. Through the above structure, the inclined pressurizing channel 1171' facilitates liquid to enter the first inner cavity 1110'.

[0042] It can be understood that the pressure member 1400 ′ and other structures have the same functions as those in the above embodiments, and will not be described in detail here.

[0043] It is still necessary to explain that, at present, the devices for testing mechanical seals are mostly driven by ordinary motors and speed sensors. This structure makes it impossible for the device to accurately adjust the speed and torque, and can only know whether the mechanical seal is complete at the current speed through the reading of the speed sensor. However, the present application drives the rotating shaft 1300 through a servo motor that can accurately adjust the speed and torque, so that it can test for a long time whether the mechanical seal is complete at a certain speed, further improving the test accuracy of the mechanical seal test device 1000.

[0044] The positive pressure test and the reverse pressure test are further described in combination with the above embodiments:

[0045] (I) Positive pressure test, please refer to Figure 1 :

[0046] (1) After the rotating shaft 1300 and the mechanical seal 2000 to be tested are correctly installed, the rotating shaft 1300 is installed on the first joint 1140, and the mechanical seal 2000 to be tested is placed in the second inner cavity 1120, and the sealing end cover 1800 is installed to seal the second inner cavity 1120, and then the pressurizing member 1400 is installed on the sealing end cover 1800.

[0047] (2) Open the exhaust port 1180 and inject oil into the second inner cavity 1120 through the pressurizing member 1400. After the second inner cavity 1120 is filled with oil, close the exhaust port 1180.

[0048] (3) After the air pressure in the second inner cavity 1120 is increased to 0.16 MPa by the pressurizing member 1400 , the rotary driving member 1200 is turned on.

[0049] (4) Collect the liquid leakage at the liquid outlet 1130.

[0050] It can be understood that in the positive pressure test, the rotation speed of the rotating drive member 1200 is adjusted to (100 / 300 / 500) revolutions per minute, and is continuously operated for 100 hours. By observing the pressure gauge 1420, the air pressure in the second inner cavity 1120 is maintained within the range of ±0.01Mpa. If the liquid leakage at the liquid outlet 1130 is less than or equal to 3ml / h, the mechanical seal test is qualified.

[0051] (II) Back pressure test, please refer to Figure 2 Combined with Figure 1 :

[0052] (1) After correctly installing the rotating shaft 1300' and the mechanical seal 2000 to be tested, install the rotating shaft 1300' on the first joint 1140', place the mechanical seal 2000' to be tested in the second inner cavity 1120', install the first inner cavity 1110', the pressurizing member 1400' and the pressure gauge 1420', and connect the pressurizing member 1400' to other pressurizing equipment.

[0053] (2) Open the exhaust port 1180' and inject oil into the first inner cavity 1110' through the pressurizing member 1400'. After the first inner cavity 1110' is filled with oil, close the exhaust port 1180'.

[0054] (3) After the pressure in the first inner cavity 1110' is increased to 0.05 MPa by the pressurizing member 1400', the rotary driving member 1200' is turned on.

[0055] (4) Collect the liquid leakage at the liquid outlet 1130'.

[0056] It can be understood that in the back pressure test, the rotation speed of the rotating drive member 1200' is adjusted to (100 / 300 / 500) revolutions per minute, and is continuously operated for 100 hours. By observing the pressure gauge 1420', the air pressure in the first inner cavity 1110' is maintained within the range of ±0.01Mpa. If the liquid leakage at the liquid outlet 1130' is less than or equal to 3ml / h, the mechanical seal test is qualified.

[0057] The positive pressure test and the reverse pressure test are further explained in combination with the above-mentioned test method. When it is necessary to perform a positive pressure test on the mechanical seal 2000 under test, the second inner cavity 1120 contains liquid, and the first inner cavity 1110 is connected to the liquid outlet 1130, so that the second inner cavity 1120 is pressurized by the pressurizing member 1400, and the liquid from the first inner cavity 1110 is received at the liquid outlet 1130. By measuring the amount of liquid leaked from the liquid outlet 1130, it is possible to determine whether the positive pressure test of the mechanical seal meets the process requirements. When it is necessary to perform a back pressure test on the mechanical seal 2000 under test, the first inner cavity 1110' contains liquid, and the second inner cavity 1120" is connected to the liquid outlet 1130', so that the first inner cavity 1110' is pressurized by the pressurizing member 1400', and the liquid from the first inner cavity 1110' is collected at the liquid outlet 1130', and the amount of liquid leaked from the liquid outlet 1130' is measured, so as to know whether the back pressure test of the mechanical seal meets the process requirements. It should be noted that, since the mechanical seal is not completely sealed in practice, in the present application, the first inner cavity 1110 or the second inner cavity 1120 is connected to the liquid outlet 1130 (liquid outlet 1130'), and the amount of liquid flowing out of the liquid outlet 1130 (liquid outlet 1130') can be used to determine whether the mechanical seal meets the process requirements.

[0058] The embodiment of the present application provides a mechanical seal test device 1000 for testing the performance of a mechanical seal 2000 to be tested, characterized in that the mechanical seal test device 1000 comprises: a housing 1100, a rotary drive member 1200, a rotary shaft 1300 and a pressurizing member 1400. The housing 1100 is provided with a first inner cavity 1110 and a second inner cavity 1120 in sequence, and the housing 1100 is also provided with a liquid outlet 1130. The rotary drive member 1200 is connected to one end of the housing 1100. One end of the rotary shaft 1300 is connected to the rotary drive member 1200, and the rotary drive member 1200 can drive the rotary shaft 1300 to rotate relative to the housing 1100. The other end of the rotary shaft 1300 passes through the first inner cavity 1110 and extends to the second inner cavity 1120, and the rotary shaft 1300 is used to connect the mechanical seal 2000 to be tested that isolates the first inner cavity 1110 and the second inner cavity 1120. The pressurizing member 1400 is connected to the housing 1100. The first inner cavity 1110 is in communication with the liquid outlet 1130, the second inner cavity 1120 is in communication with the pressurizing member 1400, and the second inner cavity 1120 is used to contain liquid, or the first inner cavity 1110 is in communication with the pressurizing member 1400, the first inner cavity 1110 is used to contain liquid, and the second inner cavity 1120 is in communication with the liquid outlet 1130. Through the above structure, when the first inner cavity 1110 or the second inner cavity 1120 contains liquid, the liquid at the liquid outlet 1130 can be collected and measured to respectively know whether the mechanical seal meets the process requirements in both directions.

[0059] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all deemed to be within the scope of the present application specification; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A mechanical seal testing device, used to test the performance of a mechanical seal to be tested, characterized in that: The mechanical seal testing device comprises: A shell, wherein a first inner cavity and a second inner cavity are sequentially provided inside the shell, and the shell is also provided with a liquid outlet; A rotary drive member connected to one end of the housing; A rotating shaft, one end of which is connected to the rotating driving member, the rotating driving member can drive the rotating shaft to rotate relative to the housing, the other end of the rotating shaft passes through the first inner cavity and extends to the second inner cavity, and the rotating shaft is used to connect the measured mechanical seal that isolates the first inner cavity and the second inner cavity; A pressurizing member connected to the housing; The first inner cavity is communicated with the liquid outlet, the second inner cavity is communicated with the pressurizing member, and the second inner cavity is used to contain liquid, or the first inner cavity is communicated with the pressurizing member, the first inner cavity is used to contain liquid, and the second inner cavity is communicated with the liquid outlet.

2. The mechanical seal testing device according to claim 1, characterized in that: The housing comprises a first joint, a shell and a second joint connected in sequence; The rotary drive member is connected to an end of the first joint away from the housing, and the rotary shaft is rotatably connected to the first joint and the second joint respectively; The first connector, the shell and the second connector together form the first inner cavity, and the second inner cavity is disposed at one end of the second connector away from the shell.

3. The mechanical seal testing device according to claim 2, characterized in that: One end of the housing is sleeved outside the first joint, and a sealing ring is provided between the housing and the first joint; and / or The other end of the shell is sleeved outside the second joint, and a sealing ring is provided between the shell and the second joint.

4. The mechanical seal testing device according to claim 2, characterized in that: A first bearing is provided between the first joint and the rotating shaft; and / or A second bearing is provided between the second joint and the rotating shaft.

5. The mechanical seal testing device according to claim 2, characterized in that: The first joint is provided with a pressurizing channel communicating with the first inner cavity, the pressurizing member is connected to the first joint and communicates with the pressurizing channel, and the liquid outlet is provided at the second joint and communicates with the second inner cavity.

6. The mechanical seal testing device according to claim 2, characterized in that: The housing further comprises a sealing end cover, the sealing end cover is connected to an end of the second joint away from the housing, and the sealing end cover is provided with a pressurizing hole communicating with the second inner cavity; The pressurizing member is connected to the sealing end cover and communicated with the pressurizing hole, and the liquid outlet is arranged at the second joint and communicated with the first inner cavity.

7. The mechanical seal testing device according to claim 2, characterized in that: The housing further comprises a third joint, the shell comprises a first shell and a second shell connected to both ends of the third joint, an end of the first shell facing away from the third joint is connected to the first joint, and an end of the second shell facing away from the third joint is connected to the second joint; The first joint, the first shell, the third joint, the second shell and the second joint together form the first inner cavity, and the rotating shaft is rotatably connected to the third joint.

8. The mechanical seal testing device according to claim 7, characterized in that: The third joint is provided with a pressurizing channel communicating with the first inner cavity, the pressurizing member is connected to the third joint and communicates with the pressurizing channel, and the liquid outlet is provided at the second joint and communicates with the second inner cavity.

9. The mechanical seal testing device according to any one of claims 1 to 8, characterized in that: The shell is also provided with an exhaust port, and the exhaust port is communicated with the first inner cavity or the second inner cavity.

10. The mechanical seal testing device according to any one of claims 1 to 8, characterized in that: The pressurizing member includes a pressurizing interface and a pressure gauge connected to each other; The pressurizing interface is in communication with the first inner cavity or the second inner cavity, and the pressure gauge is used to detect the pressure in the first inner cavity or the second inner cavity.

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