Mechanical seal detection device

Abstract

The present invention relates to the field of mechanical seal technology, and specifically to a mechanical seal detection device, comprising: a base, suitable for sealingly connecting one end of a turbine pump assembly; an airtight housing, suitable for sealingly connecting the other end of the turbine pump assembly, the airtight housing comprising an assembly cavity, the assembly cavity being suitable for assembling a core shaft of the turbine pump assembly; at least two bearings, arranged on the airtight housing and located on both sides of the core shaft, suitable for coinciding the center line of the core shaft with the center line of the turbine pump assembly. By arranging bearings on both sides of the core shaft, the center line of the core shaft coincides with the center line of the turbine pump assembly, and the bearings on both sides of the core shaft can keep the core shaft taut, prevent the core shaft from tilting, and make the core shaft of the turbine pump assembly the same as the core shaft state when the turbine pump is in use, thereby ensuring as much as possible that the leakage detection result of the turbine pump is the same as the leakage result when in use, preventing the need to disassemble and reassemble the turbine pump when the difference between the two is large, and ensuring the assembly progress.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical seals, and in particular to a mechanical seal detection device. Background Art

[0002] The liquid rocket engine turbo pump plays a key role as the "heart" of the liquid rocket engine. As one of the important components of the turbo pump, the mechanical seal realizes the medium's on-off, backflow prevention or regulation functions. The leakage of the mechanical seal is an important parameter of the turbo pump. Generally, after the turbo pump is assembled with the mechanical seal, a special leakage inspection tool needs to be installed, and then the gas of the required pressure is injected into the turbo pump, and the leakage of the mechanical seal is checked by the flow meter.

[0003] However, when checking the leakage of a turbo pump, the mechanical seal detection device in the prior art usually starts to check the leakage after only simple plugging tools are installed at both ends of the turbo pump assembly. Since the state of the turbo pump at this time is inconsistent with the final use state of the turbo pump, the leakage detection result and the leakage result of the final use state of the turbo pump are quite different. If the leakage of the turbo pump exceeds the error value during actual use, the turbo pump needs to be disassembled into parts and reassembled, which will cause a waste of progress and cost. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when the mechanical seal detection device detects the leakage of the turbine pump, there is a large difference between the leakage detection result and the leakage result when the turbine pump is in use, thereby providing a mechanical seal detection device that can reduce the difference between the leakage detection result of the turbine pump and the leakage result when it is in use.

[0005] In order to solve the above technical problems, the present invention provides a mechanical seal detection device, comprising:

[0006] A base, adapted to be sealed and connected to one end of the turbine pump assembly, wherein the base is provided with a first joint, and the first joint is adapted to be connected to a flow meter;

[0007] An airtight housing, adapted to be sealed and connected to the other end of the turbine pump assembly, the airtight housing comprising an assembly cavity, the assembly cavity being adapted to assemble a core shaft of the turbine pump assembly, the airtight housing being provided with a second joint, the second joint being adapted to be connected to an airtight test bench;

[0008] At least two bearings are arranged on the airtight housing and are located on both sides of the core shaft, suitable for making the center line of the core shaft coincide with the center line of the turbine pump assembly.

[0009] Furthermore, the mechanical seal detection device also includes:

[0010] A clamping device is fixedly connected in the assembly cavity and is suitable for clamping the bearing.

[0011] Furthermore, the airtight housing comprises:

[0012] A body, one end of which is suitable for sealingly connecting to the other end of the turbine pump assembly, and the body is arranged to form the assembly cavity;

[0013] The cover body is sealed and connected to the other end of the body, and the cover body is provided with the second joint.

[0014] Furthermore, the body comprises:

[0015] A vertical section, wherein first brackets are respectively disposed on both sides of one end of the vertical section, and the first brackets are suitable for sealingly connecting the other end of the turbine pump assembly;

[0016] A step section, one end of which is connected to the other end of the vertical section, the step section includes at least one first step portion, the first step portion is provided with the bearing and the clamping device, and second brackets are respectively provided on both sides of the other end of the step section, and the second brackets are sealed and connected to the cover body.

[0017] Furthermore, the step section includes at least two first step portions, one of which is provided with the bearing, and at least another of which is fixedly connected with the clamping device.

[0018] Furthermore, the pressing device comprises:

[0019] A clamping body is provided with at least one second step portion, an end portion of the second step portion is pressed on the bearing, and the second step portion is matched and fixedly connected with the first step portion.

[0020] Furthermore, the second step portion is threadedly connected to the first step portion.

[0021] Further, a first sealing device is provided between the first bracket and the other end of the turbine pump assembly;

[0022] And / or, the first bracket is fixedly connected to the other end of the turbine pump assembly by screws;

[0023] And / or, a second sealing device is provided between the cover body and the second bracket;

[0024] And / or, the cover body and the second bracket are fixedly connected by screws.

[0025] Furthermore, the mechanical seal detection device also includes a sleeve, which is sleeved on the outer side of the core shaft, and the first end of the sleeve is lower than the free end of the core shaft, and the bearing is arranged above the first end of the sleeve.

[0026] Furthermore, the mechanical seal detection device also includes:

[0027] A tightening device is sealingly connected to the base, and one end of the tightening device is connected to the center of the end of the core shaft away from the free end.

[0028] Furthermore, a mounting hole is provided at the center of the base, the tightening device is provided in the mounting hole, and a third sealing device is provided between the tightening device and the inner wall of the mounting hole.

[0029] Further, a fourth sealing device is provided between the base and one end of the turbine pump assembly;

[0030] And / or, the base is connected to one end of the turbine pump assembly via screws.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. The mechanical seal detection device provided by the present invention realizes the sealing of the turbine pump assembly by arranging a base and an airtight shell to respectively seal and connect the two ends of the turbine pump assembly, and by arranging bearings on both sides of the core shaft, the center line of the core shaft coincides with the center line of the turbine pump assembly, and the bearings on both sides of the core shaft can keep the core shaft taut to prevent the core shaft from tilting, so that the core shaft of the turbine pump assembly is in the same state as the core shaft when the turbine pump is in use, and then the airtight test bench connected to the second joint is filled with compressed air, and the flow meter connected to the first joint can be used to detect whether there is leakage in the mechanical seal. During the detection stage, even if the turbine pump assembly is in the same state as when in use, it is ensured as much as possible that the leakage detection result of the turbine pump is the same as the leakage result when in use, and it is prevented that the turbine pump needs to be disassembled and reassembled when the difference between the two is large, thereby ensuring the assembly progress and reducing the cost.

[0033] 2. The mechanical seal detection device provided by the present invention has a bearing in a clamped state when the turbine pump assembly is in use. By providing a clamping device to clamp the bearing, the state of the bearing in the detection stage is the same as that when the turbine pump assembly is in use, further ensuring that the leakage detection result of the turbine pump is the same as the leakage result when in use.

[0034] 3. The mechanical seal detection device provided by the present invention makes the assembly of the airtight housing simpler and more convenient by configuring the airtight housing to include a main body and a cover body.

[0035] 4. The mechanical seal detection device provided by the present invention, by configuring the main body of the airtight shell into vertical sections and stepped sections, enables the airtight shell to be more conveniently connected to the turbine pump assembly, the bearing and the clamping device, making the overall structure setting simpler and more compact.

[0036] 5. The mechanical seal detection device provided by the present invention can ensure the installation accuracy of the airtight housing, the bearing and the clamping device by setting the first step portion and the second step portion, thereby meeting the detection requirements of the mechanical seal of the turbine pump assembly.

[0037] 6. The mechanical seal detection device provided by the present invention replaces the shaft system product of the turbine pump assembly during actual use by arranging a sleeve on the outer side of the core shaft, and the first end of the sleeve is lower than the free end of the core shaft, and the bearing is arranged above the first end of the sleeve, so that the position of the bearing is consistent with the position when the turbine pump is actually used, further ensuring that the leakage detection result of the turbine pump is the same as the leakage result when it is in use.

[0038] 7. The mechanical seal detection device provided by the present invention, by arranging a tightening device, is connected to the center of the end of the core shaft away from the free end, and can cooperate with the clamping device to ensure that the axial force exerted on the core shaft is consistent with the axial force when the turbine pump is actually used, and further ensure that the leakage detection result of the turbine pump is the same as the leakage result when it is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a cross-sectional view of a mechanical seal detection device of the present invention;

[0041] Figure 2 is a cross-sectional view of a base of a mechanical seal detection device of the present invention;

[0042] Figure 3 A cross-sectional view of the main body of the airtight housing of the mechanical seal detection device of the present invention;

[0043] Figure 4 A cross-sectional view of a clamping device of a mechanical seal detection device of the present invention;

[0044] Figure 5 A cross-sectional view of a cover of an airtight housing of a mechanical seal detection device of the present invention;

[0045] Figure 6 It is a cross-sectional view of the tightening device of the mechanical seal detection device of the present invention.

[0046] Description of reference numerals:

[0047] 1-base; 2-turbine pump assembly; 3-first joint; 4-assembly chamber; 5-core shaft; 6-second joint; 7-bearing; 8-clamping device; 9-body; 10-cover; 11-vertical section; 12-first step portion; 13-second step portion; 14-first sealing device; 15-screw; 16-second sealing device; 17-sleeve; 18-tightening device; 19-third sealing device; 20-fourth sealing device; 21-mounting hole. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] The mechanical seal detection device in the prior art checks the leakage of the turbine pump after the mechanical seal is assembled on the turbine pump. The overall assembly after the mechanical seal is assembled on the turbine pump is referred to as a turbine pump assembly. Usually, only simple sealing tools are installed at both ends of the turbine pump assembly and then the leakage check is started. The inventor found that the state of the turbine pump assembly at this time is quite different from the state of the final assembled turbine pump assembly during actual use. Even if the mechanical seal leakage result at this time is qualified, it cannot represent that the seal leakage of the final turbine pump assembly during actual use can reach the qualified level. For example, even if the core shaft of the turbine pump is slightly skewed, it may cause a large difference between the leakage during detection and the leakage during actual use.

[0053] For this reason, Figure 1 - Figure 6 As shown, a mechanical seal detection device is provided in this embodiment, including: a base 1, suitable for sealingly connecting one end of the turbine pump assembly 2, a first joint 3 is provided on the base 1, and the first joint 3 is suitable for connecting a flow meter; an airtight housing, suitable for sealingly connecting the other end of the turbine pump assembly 2, the airtight housing includes an assembly cavity 4, the assembly cavity 4 is suitable for assembling a core shaft 5 of the turbine pump assembly 2, a second joint 6 is provided on the airtight housing, and the second joint 6 is suitable for connecting an airtight test bench; at least two bearings 7 are provided on the airtight housing and are located on both sides of the core shaft 5, suitable for making the center line of the core shaft 5 coincide with the center line of the turbine pump assembly 2.

[0054] By setting a base 1 and an airtight shell to seal and connect the two ends of the turbine pump assembly 2 respectively, the turbine pump assembly 2 is blocked, and bearings 7 are set on both sides of the core shaft 5 so that the center line of the core shaft 5 coincides with the center line of the turbine pump assembly 2. The bearings 7 on both sides of the core shaft 5 can keep the core shaft 5 taut to prevent the core shaft 5 from tilting, so that the core shaft 5 of the turbine pump assembly 2 is in the same state as the core shaft 5 when the turbine pump is in use, and is always kept in a vertical state. Then, compressed air is filled into the airtight test bench connected by the second joint 6, and the flow meter connected by the first joint 3 can detect whether there is leakage in the mechanical seal. During the detection stage, the turbine pump assembly 2 is in the same state as when it is in use, which ensures that the leakage detection result of the turbine pump is the same as the leakage result when it is in use as much as possible, and prevents the turbine pump from being disassembled and reassembled when the difference between the two is large, thereby ensuring the assembly progress and reducing the cost.

[0055] Since the bearing 7 is in a clamped state when the turbine pump assembly 2 is in actual use, in order to further ensure that the leakage detection result of the turbine pump is the same as the leakage result when in use, the mechanical seal detection device also includes a clamping device 8, which is fixedly connected in the assembly cavity 4 and is suitable for clamping the bearing 7. A torque can be applied to the clamping device 8 by a torque wrench to clamp the outer ring of the bearing 7, so that the clamping force applied to the bearing 7 is consistent with that during actual assembly and use.

[0056] Specifically, the base 1 screw 15 is sealed and connected to the lower end of the turbine pump assembly 2, and the airtight housing screw 15 is sealed and connected to the upper end of the turbine pump assembly 2. A bearing 7 is respectively provided on both sides of the core shaft 5. Compared with the mechanical seal detection in the prior art where only one bearing 7 is provided, it can better ensure that the core shaft 5 is not skewed, which is the same as the state in actual use.

[0057] like Figure 1 and Figure 5 As shown, the airtight housing includes: a body 9, one end of which is suitable for sealingly connecting to the other end of the turbine pump assembly 2, and the body 9 is arranged to form an assembly cavity 4; a cover body 10 which is separately arranged from the body 9 and is sealed to the other end of the body 9, and a second joint 6 is provided on the cover body 10, specifically, the second joint 6 is a threaded joint for connecting to the airtight test bench. By configuring the airtight housing to include a body 9 and a cover body 10 which are separately arranged, the assembly of the airtight housing is simpler and more convenient. As a convertible embodiment, the airtight housing may also include an integrally formed body 9 and a cover body 10.

[0058] Among them, Figure 3 As shown, the body 9 includes: a vertical section 11, first brackets are respectively arranged on both sides of one end of the vertical section 11, and the first brackets are suitable for sealingly connecting the other end of the turbine pump assembly 2; a stepped section, one end of which is connected to the other end of the vertical section 11, and the stepped section includes at least one first step portion 12, on which a bearing 7 and a clamping device 8 are arranged, and second brackets are respectively arranged on both sides of the other end of the stepped section, and the second bracket is sealed and connected to the cover body 10. By setting the body 9 of the airtight housing as the vertical section 11 and the stepped section, the airtight housing can be more conveniently connected to the turbine pump assembly 2, the bearing 7 and the clamping device 8, so that the overall structure is simpler and more compact.

[0059] The first bracket is fixedly connected to the other end of the turbo pump assembly 2 by means of screws 15, and a first sealing device 14 is provided between the first bracket and the other end of the turbo pump assembly 2; the cover body 10 is fixedly connected to the second bracket by means of screws 15, and a second sealing device 16 is provided between the cover body 10 and the second bracket. Specifically, the first sealing device 14 and the second sealing device 16 are both O-type rubber sealing rings, which play a sealing role.

[0060] Specifically, the step section includes three first step portions 12, wherein the bottom first step portion 12 is provided with a bearing 7, and the first step portion 12 adjacent to the bottom first step portion 12 is fixedly connected with a clamping device 8. In order to ensure the installation accuracy of the airtight housing and the bearing 7 and the clamping device 8, and meet the detection requirements of the mechanical seal of the turbine pump assembly 2, such as Figure 4As shown, the clamping device 8 includes: a clamping body 9, a second step portion 13 is provided on the clamping body 9, a convex portion is extended outward from the end of the second step portion 13, the convex portion is pressed on the bearing 7, and the second step portion 13 is matched and fixedly connected with the first step portion 12 adjacent to the bottom first step portion 12. As a convertible embodiment, the specific number of the first step portion 12 and the second step portion 13 can be set according to actual needs, and no excessive restrictions are made here.

[0061] The airtight housing and the clamping device 8 are both annular hollow structures, and the first step portion 12 and the second step portion 13 are threadedly connected, so as to facilitate the assembly of the clamping device 8 on the airtight housing.

[0062] like Figure 1 As shown, the mechanical seal detection device also includes a sleeve 17, which is sleeved on the outside of the core shaft 5, and the first end of the sleeve 17 is lower than the free end of the core shaft 5, and the bearing 7 is arranged above the first end of the sleeve 17. By sleeve-mounting the sleeve 17 on the outside of the core shaft 5, the shaft system product of the turbine pump assembly 2 in actual use is replaced, and the first end of the sleeve 17 is lowered than the free end of the core shaft 5, and the bearing 7 is arranged above the first end of the sleeve 17, so that the position of the bearing 7 is consistent with the position when the turbine pump is actually used, further ensuring that the leakage detection result of the turbine pump is the same as the leakage result when it is in use.

[0063] The mechanical seal detection device also includes: a tightening device 18, which is sealed and connected to the base 1, and one end of the tightening device 18 is connected to the center of the end of the core shaft 5 away from the free end. By setting the tightening device 18, which is connected to the center of the end of the core shaft 5 away from the free end, it can cooperate with the clamping device 8 to ensure that the axial force on the core shaft 5 is consistent with the axial force when the turbo pump is actually used, and further ensure that the leakage detection result of the turbo pump is the same as the leakage result when it is in use.

[0064] The center of the base 1 is provided with a mounting hole 21, a tightening device 18 is provided in the mounting hole 21, and a third sealing device 19 is provided between the tightening device 18 and the inner wall of the mounting hole 21. Specifically, Figure 6 As shown, the tightening device 18 is a push rod, which is connected to the mounting hole 21 of the base 1 through threads, and the third sealing device 19 is an O-type rubber sealing ring, which can apply torque to the push rod to ensure that the axial force on the turbine pump core shaft 5 is consistent with the axial force in actual use.

[0065] The base 1 is connected to one end of the turbine pump assembly 2 by a screw 15, and a fourth sealing device 20 is provided between the base 1 and one end of the turbine pump assembly 2. Specifically, the fourth sealing device 20 is an O-type rubber sealing ring, which plays a sealing role. The first joint 3 connected to the base 1 is a threaded joint for connecting a flow meter.

[0066] The mechanical seal detection device in this embodiment can check the leakage of the mechanical seal of the turbine pump after it is installed. Since a high-precision airtight housing is made above the turbine pump assembly 2, the airtight housing is consistent with the housing structure of the turbine pump assembly 2, thereby ensuring the assembly accuracy of the airtight housing and the housing of the turbine pump assembly 2. Since the bearing 7 consistent with that in actual use is installed on the high-precision airtight housing, it is ensured that the axis system of the core shaft 5 is fixed by two bearings 7 at this time, and the core shaft 5 will not be deflected. Since a push rod with an O-ring rubber sealing ring is installed at the bottom of the product housing, a torque wrench is used to ensure that the push rod has an upward force on the core shaft 5. This force is consistent with the force applied to the core shaft 5 when the turbine pump assembly 2 is actually in use, thereby ensuring that the compression of the mechanical seal at this time is consistent with the compression in actual use. Then, the airtight test bench connected by the second joint 6 is filled with compressed air, and the mechanical seal leakage data can be obtained through the flow meter connected by the first joint 3. Due to the arrangement of the above structure, it can be ensured as much as possible that the leakage detection result of the turbine pump is the same as the leakage result when it is in use. Therefore, if the leakage is qualified, the mechanical seal detection device can be removed, and the turbine pump assembly 2 can be mechanically assembled with other components for actual use.

[0067] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A mechanical seal detection device, It is characterized in that include: A base (1) adapted to be sealed and connected to one end of a turbine pump assembly (2), wherein the base (1) is provided with a first connector (3), wherein the first connector (3) is adapted to be connected to a flow meter; An airtight housing, adapted to be sealed and connected to the other end of the turbine pump assembly (2), the airtight housing comprising an assembly cavity (4), the assembly cavity (4) being adapted to assemble a core shaft (5) of the turbine pump assembly (2), the airtight housing being provided with a second joint (6), the second joint (6) being adapted to be connected to an airtight test bench; at least two bearings (7) provided on the airtight housing and located on both sides of the core shaft (5), suitable for making the center line of the core shaft (5) coincide with the center line of the turbine pump assembly (2); Also includes: A tightening device (18) is sealingly connected to the base (1), one end of the tightening device (18) being connected to the center of an end of the core shaft (5) away from the free end; A mounting hole (21) is provided at the center of the base (1), and the tightening device (18) is provided in the mounting hole (21); The jacking device (18) is a jack rod, which is threadably connected to a mounting hole (21) of the base (1); Also includes: A pressing device (8) fixedly connected in the assembly cavity (4) and suitable for pressing the bearing (7); It also comprises a sleeve (17) which is sleeved on the outer side of the core shaft (5), and the first end of the sleeve (17) is lower than the free end of the core shaft (5), and the bearing (7) is arranged above the first end of the sleeve (17); By providing a base (1) and an airtight housing to seal and connect the two ends of the turbine pump assembly (2), the turbine pump assembly (2) is sealed, and the bearings (7) on both sides of the core shaft (5) keep the core shaft (5) taut, preventing the core shaft (5) from tilting, so that the core shaft (5) of the turbine pump assembly (2) is in the same state as the core shaft when the turbine pump is in use; The jacking device (18) cooperates with the pressing device (8) to ensure that the axial force applied to the core shaft (5) is consistent with the axial force applied when the turbine pump is actually used.

2. The mechanical seal detection device according to claim 1, It is characterized in that The airtight housing comprises: A body (9), one end of which is suitable for sealingly connecting to the other end of the turbine pump assembly (2), and the body (9) is arranged to enclose the assembly cavity (4); The cover body (10) is sealedly connected to the other end of the main body (9), and the cover body (10) is provided with the second joint (6).

3. The mechanical seal detection device according to claim 2, It is characterized in that The body (9) comprises: A vertical section (11), wherein first brackets are respectively provided on both sides of one end of the vertical section (11), and the first brackets are suitable for sealingly connecting the other end of the turbine pump assembly (2); A step section, one end of which is connected to the other end of the vertical section (11), the step section comprising at least one first step portion (12), the first step portion (12) being provided with the bearing (7) and the clamping device (8), and second brackets being respectively provided on both sides of the other end of the step section, the second brackets being sealedly connected to the cover body (10).

4. The mechanical seal detection device according to claim 3, It is characterized in that The step section comprises at least two first step portions (12), one of the first step portions (12) being provided with the bearing (7), and at least another of the first step portions (12) being fixedly connected to the clamping device (8).

5. The mechanical seal detection device according to claim 4, It is characterized in that The pressing device (8) comprises: A clamping body (9), wherein at least one second step portion (13) is provided on the clamping body (9), an end portion of the second step portion (13) is pressed onto the bearing (7), and the second step portion (13) is matched and fixedly connected with the first step portion (12).

6. The mechanical seal detection device according to claim 5, It is characterized in that The second step portion (13) is threadedly connected to the first step portion (12).

7. The mechanical seal detection device according to any one of claims 3 to 6, It is characterized in that A first sealing device (14) is provided between the first bracket and the other end of the turbine pump assembly (2); And / or, the first bracket is fixedly connected to the other end of the turbine pump assembly (2) by means of a screw (15); And / or, a second sealing device (16) is provided between the cover body (10) and the second bracket; And / or, the cover body (10) and the second bracket are fixedly connected via screws (15).

8. The mechanical seal detection device according to claim 1, It is characterized in that A third sealing device (19) is provided between the tightening device (18) and the inner wall of the mounting hole (21).

9. The mechanical seal detection device according to any one of claims 1 to 6, It is characterized in that A fourth sealing device (20) is provided between the base (1) and one end of the turbine pump assembly (2); And / or, the base (1) is connected to one end of the turbine pump assembly (2) via a screw (15).

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