CN115573943A

CN115573943A - Mechanical seal for pump

Info

Publication number: CN115573943A
Application number: CN202211555434.9A
Authority: CN
Inventors: 李博建; 梁冰; 何智文; 马春雨
Original assignee: Hebei Shuangda Petroleum Equipment Manufacturing Co ltd
Current assignee: Hebei Shuangda Petroleum Equipment Manufacturing Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-01-06
Anticipated expiration: 2042-12-06
Also published as: CN115573943B

Abstract

The invention discloses a mechanical seal for a pump, which relates to the technical field of mechanical seal and provides a scheme that the mechanical seal comprises a sealing mechanism and a spring compression judging mechanism, wherein the spring compression judging mechanism is arranged at one side position of the sealing mechanism and comprises a plurality of sound generating sheets and a plurality of knocking plates; the invention reminds an installer through sound in the installation process, so that the installer can master the compression degree of the spring in the installation process, avoid the occurrence of the condition of larger or smaller compression amount, avoid the occurrence of the condition of abrasion and burning loss of a friction part, avoid the capability of adjusting the end surface of the movable ring, ensure the sealing effect, and also avoid the occurrence of the condition of dry abrasion and damage of mechanical seal after evacuation, and ensure the sealing effect.

Description

Mechanical seal for pump

Technical Field

The invention relates to the technical field of mechanical seals, in particular to a mechanical seal for a pump.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and elastic force or magnetic force of a compensation mechanism and the cooperation of an auxiliary seal.

At present mechanical seal is in the in-process of installation, because the installation order, just can adjust the spring after need installing the impeller, but because the hindrance of impeller, the spring can't master the compression degree at the in-process of compression, so can't master the frictional force between quiet ring and the rotating ring, the spring compression volume is too big, can lead to the rapid wearing and tearing of friction department, can seriously lead to the scaling loss, and excessive compression makes the spring lose the ability of adjusting the rotating ring terminal surface, lead to sealed inefficacy, and pump is evacuated afterwards mechanical seal rotating ring and quiet ring terminal surface and has lost cooling and lubrication, take place the dry grinding, lead to mechanical seal to damage easily, make the condition of sealed inefficacy take place, we provide a mechanical seal for the pump for this reason.

Disclosure of Invention

The invention provides a mechanical seal for a pump, which aims to overcome the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a mechanical seal for a pump comprises a sealing mechanism and a spring compression judging mechanism, wherein the spring compression judging mechanism is installed at one side of the sealing mechanism and comprises a plurality of sound generating sheets and a plurality of knocking plates, and the spring compression judging mechanism reminds an installer of the compression condition of a first spring by using sound when the spring compression condition cannot be seen;

the protection mechanism is arranged at one side of the sealing mechanism and comprises a water tank, one side of the water tank is communicated with a plurality of water outlet pipes, and when liquid in the pump is pumped out, the protection mechanism soaks the contact surface of the static ring and the dynamic ring, so that the dry grinding condition caused by overhigh temperature is avoided, and the service life of the protection mechanism is shortened;

alarm mechanism, alarm mechanism installs the inner wall at protection mechanism, alarm mechanism includes floats the board, the both sides of floating the board all are fixed with the scraper blade, and alarm mechanism reports to the police to the water level in the water tank, reminds the processing, avoids the water tank in rivers to finish leading to the condition emergence that dry wear is bad.

Further, sealing mechanism includes quiet ring and rotating ring, one side fixedly connected with spring one of rotating ring, the other end fixedly connected with of spring one presses the clamping ring, spring compression judges the mechanism include with rotating ring outer wall fixed connection's L type mount, and is a plurality of the sound production piece respectively with two L type mount fixed connection, two one side that L type mount is relative all is fixed with multiunit pivot mount, the internal rotation of pivot mount is connected with the pivot, the outside cover of pivot is equipped with a plurality of torque spring, the external fixation of pivot has the fixed plate, one side of fixed plate is fixed with the baffle, the external fixation according to the clamping ring dials the ring, and the material of a plurality of sound production pieces is all inequality, and the sound of pounding is also different, according to the degree of the sound prompt spring compression of difference.

Further, the spring compression judging mechanism further comprises a connecting plate fixedly connected with the baffle, the knocking plate is hinged to the connecting plate, and the knocking plate is made of iron.

Further, protection mechanism still includes the water inlet of seting up at the water tank top, one side and quiet ring fixed connection of water tank, on water flowed to the contact surface from the outlet pipe, wet the contact surface, make it avoid dry grinding.

Further, alarm device includes the chute frame with water tank inner wall fixed connection, the inside cover of chute frame is equipped with the traveller, the floating plate rotates with the traveller to be connected, and the floating plate drives the traveller and moves down.

Further, alarm mechanism still include with water tank inner wall fixed connection's spring two, the other end fixedly connected with sensor of spring two, the external alarm of sensor, sensor signal is received to the alarm, then reports to the police, reminds the user in time to handle.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the sealing mechanism is arranged and sealed through the static ring and the dynamic ring, so that the liquid leakage is avoided.

2. According to the invention, the spring compression judgment mechanism, the protection mechanism and the alarm mechanism are arranged, wherein the spring compression judgment mechanism reminds an installer of the compression condition of the first spring by using sound when the spring compression condition cannot be seen, the protection mechanism soaks the contact surface of the static ring and the dynamic ring when liquid in the pump is pumped out, the dry abrasion condition caused by overhigh temperature is avoided, the service life of the protection mechanism is shortened, the alarm mechanism alarms the water level in the water tank, reminds the water level in the water tank, and the dry abrasion damage condition caused by the water flow in the water tank is avoided.

In conclusion, the device is novel in design and simple to operate, an installer is reminded through sound in the installation process, the installer can master the compression degree of the spring in the installation process, the situation that the compression amount is large or small is avoided, the situations of abrasion and burning loss of a friction part are avoided, the capability of adjusting the end face of the movable ring is also avoided, the sealing effect is guaranteed, and the situation that the mechanical seal is damaged due to dry abrasion after evacuation is avoided, and the sealing effect is guaranteed.

Drawings

Fig. 1 is a schematic perspective view of a first mechanical seal for a pump according to the present invention;

fig. 2 is a schematic front view of a mechanical seal for a pump according to the present invention;

fig. 3 is an enlarged schematic structural diagram of a portion a in fig. 2 of a mechanical seal for a pump according to the present invention;

FIG. 4 is a schematic structural diagram of an alarm mechanism of a mechanical seal for a pump according to the present invention;

fig. 5 is a second perspective view of a mechanical seal for a pump according to the present invention;

fig. 6 is a third schematic perspective view of a mechanical seal for a pump according to the present invention.

In the figure: 1. a sealing mechanism; 11. a stationary ring; 12. a moving ring; 13. a first spring; 14. pressing a ring; 2. a spring compression determination mechanism; 21. an L-shaped fixing frame; 22. a rotating shaft; 23. a torsion spring; 24. a fixing plate; 25. a baffle plate; 26. a connecting plate; 27. knocking the plate; 28. a sound-emitting sheet; 29. ring shifting; 3. a protection mechanism; 31. a water tank; 32. a water outlet pipe; 4. an alarm mechanism; 41. a chute frame; 42. a floating plate; 43. a sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

Referring to FIGS. 1-3: a mechanical seal for a pump comprises a sealing mechanism 1 and a spring compression judging mechanism 2, wherein the spring compression judging mechanism 2 is installed at one side of the sealing mechanism 1, the spring compression judging mechanism 2 comprises a plurality of sounding sheets 28 and a plurality of knocking plates 27, and the spring compression judging mechanism 2 reminds an installer of the compression condition of a spring I13 by using sound when the spring compression condition cannot be seen;

the protection mechanism 3 is arranged at one side of the sealing mechanism 1, the protection mechanism 3 comprises a water tank 31, one side of the water tank 31 is communicated with a plurality of water outlet pipes 32, and the protection mechanism 3 soaks the contact surface of the static ring 11 and the moving ring 12 when liquid in the pump is pumped out, so that the dry grinding condition caused by overhigh temperature is avoided, and the service life of the protection mechanism is shortened;

the alarm mechanism 4 is arranged on the inner wall of the protection mechanism 3, the alarm mechanism 4 comprises a floating plate 42, scraping plates are fixed on two sides of the floating plate 42, the alarm mechanism 4 alarms the water level in the water tank 31 to remind the user of treatment, and the dry abrasion damage caused by the fact that the water in the water tank 31 completely flows is avoided;

the sealing mechanism 1 comprises a static ring 11 and a movable ring 12, one side of the movable ring 12 is fixedly connected with a first spring 13, and the other end of the first spring 13 is fixedly connected with a pressing ring 14;

the spring compression judging mechanism 2 comprises an L-shaped fixing frame 21 fixedly connected with the outer wall of the movable ring 12, a plurality of sounding sheets 28 are respectively and fixedly connected with the two L-shaped fixing frames 21, a plurality of groups of rotating shaft fixing frames are respectively fixed on one opposite sides of the two L-shaped fixing frames 21, a rotating shaft 22 is rotatably connected inside the rotating shaft fixing frames, a plurality of torsion springs 23 are sleeved outside the rotating shaft 22, a fixing plate 24 is fixed outside the rotating shaft 22, a baffle 25 is fixed on one side of the fixing plate 24, a shifting ring 29 is fixed outside the pressing ring 14, the sounding sheets 28 are made of different materials, the knocked-out sounds are different, and the degree of spring compression is prompted according to the different sounds;

the spring compression judging mechanism 2 further comprises a connecting plate 26 fixedly connected with the baffle 25, the knocking plate 27 is hinged with the connecting plate 26, and the knocking plate 27 is made of iron.

Example 2

Referring to FIGS. 2-6: the embodiment provides a technical scheme on the basis of the first embodiment: the protection mechanism 3 further comprises a water inlet arranged at the top of the water tank 31, one side of the water tank 31 is fixedly connected with the static ring 11, and water flows onto the contact surface from the water outlet pipe 32 to infiltrate the contact surface so as to avoid dry grinding;

the alarm mechanism 4 comprises a chute frame 41 fixedly connected with the inner wall of the water tank 31, a sliding column is sleeved inside the chute frame 41, a floating plate 42 is rotatably connected with the sliding column, and the floating plate 42 drives the sliding column to move downwards;

the alarm mechanism 4 further comprises a second spring fixedly connected with the inner wall of the water tank 31, the other end of the second spring is fixedly connected with a sensor 43, the sensor 43 is externally connected with an alarm, the alarm receives a sensor signal and then gives an alarm to remind a user of timely treatment.

The working principle is as follows: firstly, a static ring 11 is arranged on a pump according to a mechanical seal installation mode, then a movable ring 12 is sleeved on a shaft, then an impeller is arranged to start to extrude a pressing ring 14, the pressing ring 14 compresses a spring I13, the smooth surface of the movable ring 12 is in contact with the smooth surface of the static ring 11, the pressing ring 14 drives a shifting ring 29 to be close to an L-shaped fixed frame 21 and a baffle plate 25 when compressing the spring I13, the baffle plate 25 is extruded after contacting the baffle plate 25, the baffle plate 25 rotates around a rotating shaft 22 and extrudes a torsion spring 23, the baffle plate 25 rotates to drive a connecting plate 26 and a knocking plate 27 to move, so that the knocking plate 27 is far away from a sound producing sheet 28, after the shifting ring 29 presses the baffle plate 25 to rotate to a certain degree, if the shifting ring 29 moves downwards continuously, the baffle plate 25 resets due to the far away of the shifting ring 29, and the baffle plate 25, the connecting plate 26 and the knocking plate 27 are reset due to the resilience force of the torsion spring 23, the knocking plate 27 rings the sound piece 28 to remind an installer of the compression degree of the first spring 13, so that the installer can make installation judgment under the condition that the first spring 13 cannot be compressed when an impeller is blocked, the situation that the first spring 13 is compressed too tightly to cause overlarge friction force between the static ring 11 and the moving ring 12 and influence the service life of a mechanical seal is avoided, when the pump is pumped out, water in the water tank 31 flows out from the water outlet pipe 32, falls at the contact position of the moving ring 12 and the static ring 11 to lubricate the moving ring and avoid the mechanical seal damage caused by dry grinding, the floating plate 42 moves downwards along with the water level along with the reduction of the water level, when the sensor 43 passes by, the sensor 43 scratches the sensor 43 and sends a signal to an alarm to give an alarm, and when liquid enters the pump again, the liquid enters the water tank 31 from the water tank opening.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A mechanical seal for a pump, comprising a sealing mechanism (1), characterized by further comprising:

the spring compression judging mechanism (2), the spring compression judging mechanism (2) is installed at one side position of the sealing mechanism (1), and the spring compression judging mechanism (2) comprises a plurality of sound generating sheets (28) and a plurality of knocking plates (27);

the protection mechanism (3) is installed at one side of the sealing mechanism (1), the protection mechanism (3) comprises a water tank (31), and a plurality of water outlet pipes (32) are communicated with one side of the water tank (31);

alarm mechanism (4), the inner wall at protection machanism (3) is installed in alarm mechanism (4), alarm mechanism (4) are including floating board (42), the both sides of floating board (42) all are fixed with the scraper blade.

2. The mechanical seal for the pump according to claim 1, characterized in that the sealing mechanism (1) comprises a static ring (11) and a dynamic ring (12), one side of the dynamic ring (12) is fixedly connected with a first spring (13), and the other end of the first spring (13) is fixedly connected with a pressing ring (14).

3. The mechanical seal for the pump according to claim 2, characterized in that the spring compression determination mechanism (2) comprises an L-shaped fixing frame (21) fixedly connected with the outer wall of the movable ring (12), the sound-generating pieces (28) are respectively fixedly connected with the two L-shaped fixing frames (21), two of the opposite sides of the L-shaped fixing frames (21) are respectively fixed with a plurality of sets of rotating shaft fixing frames, the rotating shaft (22) is connected to the inner portion of the rotating shaft fixing frame in a rotating manner, a plurality of torsion springs (23) are sleeved outside the rotating shaft (22), a fixing plate (24) is fixed outside the rotating shaft (22), a baffle (25) is fixed on one side of the fixing plate (24), and a shifting ring (29) is fixed outside the pressing ring (14).

4. A mechanical seal for a pump according to claim 3, characterized in that said spring compression determining means (2) further comprises a connecting plate (26) fixedly connected to the stop plate (25), said striking plate (27) being hinged to the connecting plate (26).

5. A mechanical seal for a pump according to claim 4, characterized in that said protection means (3) further comprises a water inlet opening at the top of the water tank (31), one side of said water tank (31) being fixedly connected to the stationary ring (11).

6. The mechanical seal for the pump according to claim 5, characterized in that the alarm mechanism (4) comprises a chute frame (41) fixedly connected with the inner wall of the water tank (31), a slide column is sleeved inside the chute frame (41), and the floating plate (42) is rotatably connected with the slide column.

7. The mechanical seal for the pump according to claim 6, characterized in that the alarm mechanism (4) further comprises a second spring fixedly connected with the inner wall of the water tank (31), the other end of the second spring is fixedly connected with a sensor (43), and the sensor (43) is externally connected with an alarm.