CN218062701U

CN218062701U - Mechanical seal operation test device of centrifugal pump

Info

Publication number: CN218062701U
Application number: CN202123372765.2U
Authority: CN
Inventors: 徐强; 向先保; 郭金强; 陈坤池; 刘星; 马爱芹; 郑嘉榕; 夏添; 吴涛; 苏萌萌; 杨全超; 田涛
Original assignee: Chengdu Longyuan Keneng Mechanical Equipment Co ltd
Current assignee: Chengdu Longyuan Keneng Mechanical Equipment Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-12-16
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a centrifugal pump mechanical seal operation test device, including operation test frock and operation test device main part, its characterized in that: the operation test tool and the operation test device main body are fixedly connected through a flange connecting bolt; the operation test tool comprises a mandrel, a tool cavity, a centrifugal pump mechanical seal, a flange plate, a lining sealing assembly, a shaft sleeve A and a shaft sleeve B. Centrifugal pump mechanical seal operation test device reliable and stable, functional strong, through to accompanying the sealed special design of lining, can reach the steady operation of experimental frock under high temperature high pressure, structurally reasonable design makes also can convenient application when mechanical seal to different footpaths is experimental.

Description

Mechanical seal operation test device of centrifugal pump

Technical Field

The utility model relates to a nuclear power centrifugal pump overhauls technical field, specifically is a centrifugal pump mechanical seal operation test device.

Background

The mechanical seal is a tool for preventing fluid leakage, which is formed by keeping fit and relative sliding of at least one pair of end faces perpendicular to the rotation axis under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and under the matching of auxiliary seal. Especially in important equipment, the performance of the mechanical seal determines the length of the equipment operating cycle. For a mechanical seal of a centrifugal pump, the mechanical seal is installed and applied to an important water pump of a nuclear power plant, and the stability and the reliability of the performance of the mechanical seal are very critical.

In order to avoid the influence of heavy loss caused by the shutdown and overhaul of equipment due to the failure of the mechanical seal after the mechanical seal of the centrifugal pump is arranged on the equipment, the mechanical seal of the centrifugal pump needs to be statically and dynamically detected. The existing mechanical seal operation test tool is single in structure, and often one tool is only suitable for mechanical seals of a certain specific model, so that the problems of high use cost, difficulty in tool replacement and long consumed time period are caused. Because can produce great axial force to the dabber when cavity internal pressure is higher in the experimental frock of current centrifugal pump to lead to operation test bench dabber bearing department axial load great, long-time operation causes the bearing loss aggravation easily, leads to the dabber to appear swinging, just so causes the inaccurate result when experimental to mechanical seal easily, produces huge influence, thereby can't assess the test result.

The technical problems reflected above are therefore a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a centrifugal pump mechanical seal operation test device.

In order to realize the purpose, the following technical scheme is adopted: the utility model provides a centrifugal pump mechanical seal operation test device, includes operation test frock and operation test device main part, its characterized in that: the operation test tool and the operation test device main body are fixedly connected through a flange connecting bolt; the operation test tool comprises a mandrel, a tool cavity, a centrifugal pump mechanical seal, a flange plate, a lining sealing assembly, a shaft sleeve A and a shaft sleeve B.

The tooling cavity is of an annular cylindrical structure, a threaded hole is formed in the end face of the tooling cavity, a flange structure is arranged on the end face, far away from the threaded hole, of the tooling cavity, and a plurality of through holes are formed in the flange surface; the flange structure of the tool cavity is fastened with the flange plate through bolts, and a sealing ring A is arranged between the tool cavity and the flange plate; a first boss is arranged on the inner side of the tool cavity and is fixedly connected with the throttling ring through a screw A; the outer side surface of the tool cavity is provided with a temperature transmitter, a pressure transmitter and a hanging ring; the tool cavity is provided with a plurality of interfaces, and the interfaces comprise a main water inlet, an exhaust port, an auxiliary water inlet, an auxiliary water outlet and a main water outlet.

As an improvement, the flange plate is of an annular structure, a threaded hole corresponding to the flange surface of the tool cavity is formed in the flange surface, and a second boss matched with the tool cavity is arranged on the flange plate.

As an improvement, the accompanying sealing component is provided with a spring seat, a spring, a push ring, an accompanying sealing movable ring, an accompanying sealing static ring, a sealing ring B, a clamping ring, an anti-rotation pin, a sealing ring C and a sealing ring D; the spring seat is of an annular structure, the end face of the spring seat is fixedly connected with the flange plate through a screw B, and a hole site for mounting the spring is arranged on the other face of the spring seat; the push ring is of an annular structure and is matched and positioned with the accompanying lining sealing movable ring, and one side of the plane of the push ring is contacted with the spring; the accompanying sealing movable ring is of an annular structure, the bottom of the accompanying sealing movable ring is in contact with the push ring, and the side surface of the accompanying sealing movable ring is in contact with a sealing ring B arranged on the flange plate; the accompanying sealing static ring is of an annular structure, is matched with the shaft sleeve B, is statically sealed through the sealing ring C and the sealing ring D, and is kept to be fixed with the shaft sleeve B in the circumferential direction through the anti-rotation pin.

As an improvement, the shaft sleeve B is of a cylindrical structure, and one end with a smaller outer diameter is matched with the flat key A to fix the circumferential direction of the mandrel; the other end face of the shaft sleeve B is provided with a transmission pin which is connected with the shaft sleeve A through the transmission pin and keeps fixed in the circumferential direction; the shaft sleeve B is matched with the clamping ring to fix the radial direction of the accompanying sealing static ring.

As an improvement, the shaft sleeve A is of a cylindrical structure, one side, close to the end face, of the shaft sleeve A is in mechanical seal connection with the centrifugal pump, and the end face of the other side of the shaft sleeve A is correspondingly connected with the transmission pin; and a sealing ring E is arranged on the inner side of the shaft sleeve A.

As an improvement, the mechanical seal of the centrifugal pump is arranged in the tool cavity and is fixedly connected through bolts.

As an improvement, the running test device main body comprises a bearing box, a flexible coupling, a motor main body and a base; the bearing box and the motor main body are arranged above the base; the bearing box is provided with a vibration sensor, a bearing thermometer I, a bearing thermometer II and a main shaft; the bearing box is connected with the motor main body through a flexible coupling.

As an improvement, the shaft sleeve A and the shaft sleeve B are both arranged on the mandrel and are pressed and fixed with the round nut through the bushing.

Compared with the prior art, the utility model the advantage lie in:

1. parts such as its motor of traditional operation test device all install in cement bench that cement was pour, once fixed just unable removal, the utility model discloses it is relatively nimble, can be with operation test device integral movement to the position of needs.

2. The utility model provides an experimental frock because the inside high pressure of cavity causes dabber axial load too big at the operation in-process to the life cycle that leads to the bearing reduces, causes the vibration scheduling problem of dabber, finally directly influences the accuracy of test result. Due to the special lining sealing design in the utility model, the medium in the cavity of the test tool can be effectively sealed and the function of balancing the axial force can be realized, thereby reducing the axial load of the mandrel;

3. the design structure of the utility model is more compact, the structure tends to modular design, the sectional design of the shaft sleeve makes the applicable occasion of the test tool more diversified, when the mechanical seal with different shaft diameters needs to be tested, only the shaft sleeve at the head section needs to be replaced, and the shaft sleeve at the rear section and the parts such as accompanying lining seal and the like do not need to be replaced, so that the process is simpler, more convenient, time-saving and labor-saving;

4. in the utility model, the independent medium circulation of mechanical seal and accompanying lining seal can be realized through the design of each interface and the design of the throttling ring, and the good working environment of the accompanying lining seal can be ensured under the condition of ensuring the working condition of the mechanical seal test, so that the test tool can run more stably;

5. in the utility model, the temperature transmitter and the pressure transmitter are arranged at the end face position of the mechanical seal friction pair, thereby realizing the dynamic monitoring of the internal working condition of the operation test tool, providing the guarantee for the accuracy of the test result and accurately providing the required test working condition;

6. the utility model discloses in increased the temperature sensor of bearing box and the vibration sensor of main shaft, realize providing the assurance to the dynamic monitoring of operation test device for the accuracy of test result, thereby avoid influencing experimental result because of the trouble of test device self.

Drawings

Fig. 1 is a schematic structural diagram of the mechanical seal operation testing device of the centrifugal pump of the present invention.

Fig. 2 is a first schematic structural diagram of an operation test tool of the centrifugal pump mechanical seal operation test device of the present invention.

Fig. 3 is a second schematic structural diagram of the operation test tool of the centrifugal pump mechanical seal operation test device of the present invention.

As shown in the figure: 1. flange connecting bolt, 2, mandrel, 3, tool cavity, 4, centrifugal pump mechanical seal, 5, flange plate, 6, shaft sleeve A, 7, shaft sleeve B,8, seal ring A,9, first boss, 10, screw A,11, throttle ring, 12, temperature transmitter, 13, pressure transmitter, 14, suspension ring, 15, main water inlet, 16, exhaust port, 17, auxiliary water inlet, 18, auxiliary water outlet, 19, main water outlet, 20, second boss, 21, spring seat, 22, spring, 23, push ring, 24, accompanying sealing movable ring, 25, accompanying sealing stationary ring, 26, seal ring B,27, collar, 28, anti-rotation pin, 29, seal ring C,30, seal ring D,31, screw B,32, flat key A,33, transmission pin, 34, seal ring E, 35, bearing box, 36, flexible coupling, 37, motor main body, 38, base, 39, vibration sensor, 40, bearing thermometer I, 41, bearing thermometer II, 42, main shaft, 43, 44, bushing, and round nut.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

With reference to the accompanying drawings 1-3, a centrifugal pump mechanical seal operation test device comprises an operation test tool and an operation test device main body, and is characterized in that: the operation test tool and the operation test device main body are fixedly connected through a flange connecting bolt 1; the operation test tool comprises a mandrel 2, a tool cavity 3, a centrifugal pump mechanical seal 4, a flange plate 5, a lining sealing assembly, a shaft sleeve A6 and a shaft sleeve B7.

The tool cavity 3 is of an annular cylindrical structure, a threaded hole is formed in the end face of the tool cavity 3, a flange structure is arranged on the end face, far away from the threaded hole, of the tool cavity 3, and a plurality of through holes are formed in the flange surface; the flange structure of the tool cavity 3 is fastened with the flange plate 5 through bolts, and a sealing ring A8 is arranged between the tool cavity 3 and the flange plate 5; a first boss 9 is arranged on the inner side of the tool cavity 3, and the first boss 9 is fixedly connected with a throttling ring 11 through a screw A10; the outer side surface of the tooling cavity 3 is provided with a temperature transmitter 12, a pressure transmitter 13 and a lifting ring 14; the tool cavity 3 is provided with a plurality of interfaces, including a main water inlet 15, an exhaust port 16, an auxiliary water inlet 17, an auxiliary water outlet 18 and a main water outlet 19. The main water inlet 15 and the main water outlet 19 are mainly used for circulating and pressurizing media for the mechanical seal 4 of the centrifugal pump; the auxiliary water inlet 17 and the auxiliary water outlet 18 are mainly used for medium circulation and pressurization of the accompanying lining; the air outlet 16 is mainly used for exhausting air in the cavity before the test, so that the test result is prevented from being influenced by excessive air.

The flange 5 is of an annular structure, a threaded hole corresponding to the flange face of the tool cavity 3 is formed in the flange face, and a second boss 20 matched with the tool cavity 3 is arranged on the flange 5, so that the positioning effect is realized, and the coaxiality is guaranteed. And a plurality of threaded holes are processed at the bottom of the flange plate 5, and the threaded holes correspond to the accompanying lining sealing assembly.

The lining sealing component is provided with a spring seat 21, a spring 22, a push ring 23, a lining sealing movable ring 24, a lining sealing static ring 25, a sealing ring B26, a clamping ring 27, an anti-rotation pin 28, a sealing ring C29 and a sealing ring D30; the spring seat 21 is of an annular structure, the end face of the spring seat is fixedly connected with the flange plate 5 through a screw B31, and a hole site for installing a spring 22 is formed in the other face of the spring seat; the push ring 23 is of an annular structure and is matched and positioned with the accompanying sealing movable ring 24, and one side of the plane of the push ring 23 is in contact with the spring 22; the accompanying lining sealing movable ring 24 is of an annular structure, the bottom of the accompanying lining sealing movable ring is in contact with the push ring 23, the side face of the accompanying lining sealing movable ring is in contact with a sealing ring B26 arranged on the flange plate 5, the accompanying lining sealing movable ring can float while sealing, the pressure of the spring 22 on the end face of the friction pair is ensured to be stable continuously, and the accompanying lining sealing movable ring can be compensated continuously; the static lining sealing ring 25 is of an annular structure, steps and pin grooves are machined in the static lining sealing ring, the static lining sealing ring is matched with the shaft sleeve B7 and is statically sealed with a sealing ring D30 through a sealing ring C29, and the static lining sealing ring is circumferentially fixed with the shaft sleeve B7 through an anti-rotating pin 28.

The shaft sleeve B7 is of a cylindrical structure, a key groove is machined at one end with a smaller outer diameter, and the key groove is matched with the flat key A32 to fix the circumferential direction of the mandrel 2; the other end face of the shaft sleeve B7 is provided with a transmission pin 33, and the transmission pin 33 is connected with the shaft sleeve A6 and keeps circumferential fixation; the sleeve B7 and a clamping ring 27 are matched to fix the radial direction of the static lining sealing ring 25. And a plurality of sealing ring grooves are processed on the shaft sleeve B7 and used for mounting a sealing ring C29, a sealing ring D30 and a sealing ring E34. Sleeve B7 is formed with a collar 27 groove for receiving collar 27 to facilitate radial positioning of the backing seal ring 258.

The shaft sleeve A6 is of a cylindrical structure, a designed cavity structure is arranged in the shaft sleeve A6, so that the weight is reduced, the load on the mandrel 2 is reduced, and the reliability of the tool in the test process is ensured, one side, close to the end face, of the shaft sleeve A6 is connected with the mechanical seal 4 of the centrifugal pump, and the end face on the other side is correspondingly connected with the transmission pin 33; and a sealing ring E34 is arranged on the inner side of the shaft sleeve A6.

The mechanical seal 4 of the centrifugal pump is arranged in the tool cavity 3 and is fixedly connected through bolts.

The running test device main body comprises a bearing box 35, a flexible coupling 36, a motor main body 37 and a base 38; the bearing box 35 and the motor main body 37 are arranged above the base 38; the bearing box 35 is provided with a vibration sensor 39, a bearing temperature meter I40, a bearing temperature meter II 41 and a main shaft 42; the bearing box 35 is connected with the motor main body 37 through a flexible coupling 36.

The shaft sleeve A6 and the shaft sleeve B7 are both arranged on the mandrel 2 and are pressed and fixed with the round nut 44 through the bushing 43.

The utility model discloses when concrete implementation: firstly, the mechanical seal 4 of the centrifugal pump is arranged in the tool cavity 3 and fixed by bolts. Then, the tool and the mechanical seal are integrally mounted on the end surface of the bearing housing 35, and power transmission is performed through the main shaft 42. After the testing device is started, the motor main body 37 drives the main shaft 42 and the mechanical seal to rotate, the actual working condition of the mechanical seal 4 of the centrifugal pump can be simulated, and finally required test data can be measured

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a centrifugal pump mechanical seal operation test device, includes operation test frock and operation test device main part, its characterized in that: the operation test tool and the operation test device main body are fixedly connected through a flange connecting bolt (1); the operation test tool comprises a mandrel (2), a tool cavity (3), a centrifugal pump mechanical seal (4), a flange plate (5), a lining sealing assembly, a shaft sleeve A (6) and a shaft sleeve B (7).

2. The mechanical seal running test device of the centrifugal pump according to claim 1, characterized in that: the tool cavity (3) is of an annular cylindrical structure, a threaded hole is formed in the end face of the tool cavity (3), a flange structure is arranged on the end face, far away from the threaded hole, of the tool cavity (3), and a plurality of through holes are formed in the flange surface; the flange structure of the tool cavity (3) is fastened with the flange plate (5) through bolts, and a sealing ring A (8) is arranged between the tool cavity (3) and the flange plate (5); a first boss (9) is arranged on the inner side of the tool cavity (3), and the first boss (9) is fixedly connected with a throttling ring (11) through a screw A (10); the outer side surface of the tooling cavity (3) is provided with a temperature transmitter (12), a pressure transmitter (13) and a lifting ring (14); the tool cavity (3) is provided with a plurality of interfaces, and the interfaces comprise a main water inlet (15), an exhaust port (16), an auxiliary water inlet (17), an auxiliary water outlet (18) and a main water outlet (19).

3. The mechanical seal running test device of the centrifugal pump according to claim 2, characterized in that: the flange plate (5) is of an annular structure, a threaded hole corresponding to the flange face of the tool cavity (3) is formed in the flange face, and a second boss (20) matched with the tool cavity (3) is arranged on the flange plate (5).

4. A centrifugal pump mechanical seal operation testing apparatus according to claim 3, characterized in that: the lining sealing component is provided with a spring seat (21), a spring (22), a push ring (23), a lining sealing movable ring (24), a lining sealing static ring (25), a sealing ring B (26), a clamping ring (27), an anti-rotation pin (28), a sealing ring C (29) and a sealing ring D (30); the spring seat (21) is of an annular structure, the end face of the spring seat is fixedly connected with the flange plate (5) through a screw B (31), and a hole site for mounting a spring (22) is formed in the other face of the spring seat; the push ring (23) is of an annular structure and is matched and positioned with the accompanying sealing movable ring (24), and one side of the plane of the push ring (23) is in contact with the spring (22); the accompanying sealing moving ring (24) is of an annular structure, the bottom of the accompanying sealing moving ring is in contact with the push ring (23), and the side surface of the accompanying sealing moving ring is in contact with a sealing ring B (26) arranged on the flange plate (5); the static lining sealing ring (25) is of an annular structure, is matched with the shaft sleeve B (7), performs static sealing with the sealing ring D (30) through the sealing ring C (29), and is kept fixed with the shaft sleeve B (7) in the circumferential direction through the anti-rotation pin (28).

5. A centrifugal pump mechanical seal operation testing device according to claim 4, characterized in that: the shaft sleeve B (7) is of a cylindrical structure, and one end with a smaller outer diameter is matched with the flat key A (32) to fix the circumference of the mandrel (2); the other end face of the shaft sleeve B (7) is provided with a transmission pin (33), and the transmission pin (33) is connected with the shaft sleeve A (6) and keeps circumferential fixation; the shaft sleeve B (7) is matched with the clamping ring (27) to fix the radial direction of the accompanying sealing static ring (25).

6. A centrifugal pump mechanical seal operation testing device according to claim 5, characterized in that: the shaft sleeve A (6) is of a cylindrical structure, one side, close to the end face, of the shaft sleeve A (6) is connected with a mechanical seal (4) of the centrifugal pump, and the end face of the other side of the shaft sleeve A (6) is correspondingly connected with a transmission pin (33); and a sealing ring E (34) is arranged on the inner side of the shaft sleeve A (6).

7. The mechanical seal operation test device of the centrifugal pump according to claim 6, characterized in that: the centrifugal pump mechanical seal (4) is arranged inside the tool cavity (3) and is fixedly connected through bolts.

8. The mechanical seal operation test device of the centrifugal pump according to claim 1, characterized in that: the operation test device main body comprises a bearing box (35), a flexible coupling (36), a motor main body (37) and a base (38); the bearing box (35) and the motor main body (37) are arranged above the base (38); the bearing box (35) is provided with a vibration sensor (39), a bearing temperature meter I (40), a bearing temperature meter II (41) and a main shaft (42); the bearing box (35) is connected with the motor main body (37) through a flexible coupling (36).

9. The mechanical seal running test device of the centrifugal pump according to claim 1, characterized in that: and the shaft sleeve A (6) and the shaft sleeve B (7) are both arranged on the mandrel (2) and are pressed and fixed with the round nut (44) through a bushing (43).