Mechanical seal gland capable of being uniformly flushed in radial direction

Abstract

The utility model relates to the technical field of mechanical seal, in particular to a mechanical seal gland capable of uniformly flushing along the radial direction, which comprises a gland body, an annular liquid storage tank is arranged on the gland body along the circumferential direction, the annular liquid storage tank is matched with a liquid distribution ring to form a liquid storage cavity, and a flushing connecting pipe is connected outside the gland body. Flushing liquid enters the mechanical seal gland from the flushing connecting pipe, fills the liquid storage cavity and then enters a working cavity of the mechanical seal gland through the liquid distribution holes evenly distributed in the liquid distribution ring, uniform flushing of the mechanical seal part can be achieved, it is guaranteed that the internal temperature and pressure of the mechanical seal are evenly distributed, the flushing effect is remarkably improved, and the mechanical seal gland is protected from being damaged. And the service life of the mechanical seal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal gland flushed evenly in radial direction. Background Art

[0002] Mechanical seals are a key part of pump products. Their function is to prevent the fluid medium in the pump body from flowing out of the pump body through the pump shaft. Their sealing performance and service life directly affect the performance and quality of the pump products. However, since the medium transported by pump products often contains impurities such as particulate matter, the accumulation of these impurities will aggravate the wear of the mechanical seal and reduce its service life. Therefore, it is particularly important to ensure the cleanliness of the mechanical seal. The traditional way is to flush the mechanical seal by opening a hole in the mechanical seal cover to connect the flushing liquid. However, this method has a single flushing path and cannot guarantee uniform flushing of the mechanical seal. There will be certain impurities remaining. At the same time, the temperature and pressure distribution inside the mechanical seal are uneven. When the flushing flow and pressure are large, it may also damage the internal structure of the mechanical seal. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art and avoid the problems of incomplete flushing caused by a single flushing path, uneven temperature and pressure distribution inside the mechanical seal, and easy damage to the mechanical seal, the utility model proposes a mechanical seal gland that flushes evenly in the radial direction.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A mechanical seal gland with uniform flushing in radial direction comprises a gland body, wherein the gland body is provided with an annular groove along the circumferential direction, the annular groove and the liquid separator ring form a liquid storage cavity, and a flushing pipe is connected to the outside of the gland body.

[0006] As a further improvement of the present invention, the liquid storage tank and the liquid separation ring are connected through an interference fit.

[0007] As a further improvement of the present invention, the liquid separating ring is provided with more than 6 liquid separating holes, and the flushing liquid can enter the interior of the mechanical seal from the liquid separating holes for flushing.

[0008] As a further improvement of the present invention, the liquid separation holes are evenly arranged along the radial direction of the liquid separation ring.

[0009] As a further improvement of the present invention, the material of the liquid separator ring is 304 stainless steel.

[0010] As a further improvement of the present invention, the liquid storage tank is connected to the liquid separation ring through a loose fit; the liquid separation holes are uniformly arranged with an offset of 5°-10° clockwise or counterclockwise relative to the radial direction of the liquid separation ring.

[0011] As a further improvement of the present invention, the width of the liquid storage tank is the same as the diameter of the liquid separation hole.

[0012] The utility model can realize uniform flushing of the mechanical seal part by arranging evenly distributed liquid separation holes on the liquid separation ring, ensure that the temperature and pressure inside the mechanical seal are evenly distributed, significantly improve the flushing effect, and extend the service life of the mechanical seal; and by setting the width of the liquid storage tank and the aperture of the liquid separation holes to be the same, the liquid storage tank is not easy to accumulate impurities or particles after long-term use; the liquid storage tank and the liquid separation ring are designed to be loosely connected, and the liquid separation holes are evenly arranged to be offset 5°-10° clockwise or counterclockwise relative to the radial direction of the liquid separation ring, so that the liquid separation ring can rotate during the cleaning process, making the flushing more uniform and improving the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the mechanical seal gland of the utility model;

[0014] Figure 2 This is a schematic diagram of an embodiment of the cross-sectional structure of the mechanical seal gland of the present invention;

[0015] Figure 3 This is a schematic diagram of an embodiment of the cross-sectional structure of the mechanical seal gland of the present invention;

[0016] Figure 4 The utility model discloses a method for implementing a flushing medium flow diagram of a mechanical seal gland;

[0017] Figure 5 The utility model discloses a method for implementing a flushing medium flow diagram of a mechanical seal gland;

[0018] Description of the labels (in the order of first appearance): 1. Gland body, 2. Separating ring, 3. Flushing connecting pipe, 4. Liquid storage chamber, 5. Separating hole, 6. Connecting pipe hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0020] like Figure 1As shown: The mechanical seal gland for uniform radial flushing proposed by the present invention includes a gland body 1, which is connected to a liquid separator ring 2 by an interference fit. A flushing pipe 3 is connected to the outside of the gland body 1. During operation, the flushing liquid enters the liquid storage cavity 4 inside the gland from the pipe hole 6, and then enters the interior of the mechanical seal through the liquid separator holes 5 evenly distributed on the liquid separator ring 2 for flushing.

[0021] The gland body 1 is connected to the liquid separator ring 2 through an interference fit, so that the liquid separator ring 2 can be firmly fixed on the inner end surface of the gland body 1. Through basic knowledge of hydraulic principles, we know that when liquid passes through a small hole, a certain pressure difference will be generated at the two end surfaces of the hole, that is, there will be a certain pressure at the inlet end of the hole. The pressure often depends on the liquid flow rate and the size of the hole. Therefore, it is necessary to design a suitable interference fit between the gland body 1 and the liquid separator ring 2 according to the number and size of the liquid separator holes 5 in the specific actual use process.

[0022] In one embodiment of the present invention, the number of the liquid separation holes 5 is set to 6. If the number of the liquid separation holes 5 is set too much, the pressure difference generated at the two end faces of the liquid separation holes 5 will become smaller, which will directly affect the reduction of the flushing force, thereby making the flushing effect worse; on the contrary, if the number of the liquid separation holes is too small, the flushing liquid will be more concentrated during the flushing process, and the pressure will be more concentrated, which is easy to cause damage to the parts or seals in the inner cavity. At the same time, if the number of the liquid separation holes is too small, the possibility of impurities and particles accumulating in the liquid storage cavity 4 will be higher, which will directly affect the flushing effect. Because once the impurities or particles are sprayed onto the parts from the liquid separation holes 5 by the high pressure of the flushing, it may cause certain scratches or scratch the seals, which is very unfavorable to the entire product. Therefore, in the specific implementation process, the number of the liquid separation holes 5 and the size of their apertures should be reasonably designed according to the specific working conditions and flushing flow rate.

[0023] In one embodiment of the present invention, the material of the liquid separator ring 2 is selected from 304 stainless steel. This is also based on the fact that the conventional cleaning liquid is generally clean water, and the liquid separator ring 2 requires a certain strength and rust resistance. In actual engineering, if other cleaning liquids are used, the material of the liquid separator ring 2 can be selected according to the specific working environment.

[0024] As for the material of the liquid separator ring 2, in addition to the 304 stainless steel provided in the present invention, in practice, it can also be made of ZCuPb10Sn10 material. This material is often used for self-lubricating bearings or bushings, so it has good wear resistance, can bear high pressure (below 20Mpa), and has good anti-rust and corrosion resistance. Therefore, this material can be used in environments with relatively harsh working conditions.

[0025] like Figure 2The figure shows an embodiment of the cross-sectional structure of the mechanical seal gland of the present invention; in the figure, we can see that two dead angles are formed between the left and right ends of the cross-sectional view of the liquid storage chamber 4 and the liquid separation ring 2, which are places where dirt and grime are easily hidden during long-term use. Therefore, as a further improvement, Figure 3 As shown, the width of the liquid storage chamber 4 is designed to be the same as the aperture of the liquid separation hole 5. This can reduce the accumulation of impurities or particles in the liquid storage chamber 4. The accumulation of impurities may have a certain corrosive effect on the liquid separation ring 2. At the same time, due to the accumulation of impurities, it may cause certain scratches on the sealing ring or internal parts during the flushing process of the flushing liquid from the liquid separation hole 5, which will seriously affect the use effect of the product. Therefore, while ensuring the flushing effect, the number of liquid separation holes 5 should be set as much as possible to avoid the accumulation of impurities.

[0026] like Figure 4 As shown: an implementation method of a flushing medium flow diagram of the mechanical seal gland of the utility model, by evenly arranging the liquid separation holes 5 along the liquid separation ring 2 in the radial direction; and connecting the gland body 1 with the liquid separation ring 2 by interference fit, so that the flushing liquid is flushed evenly in the radial direction through the liquid separation ring 2; this does significantly improve the flushing effect compared to the traditional flushing method.

[0027] Further; such as Figure 5 As shown: another embodiment of the flushing medium flow diagram of the mechanical seal gland of the present invention, the liquid storage tank 4 and the liquid separator ring 2 are connected by a loose fit; a rotating pair can be formed between the liquid storage tank 4 and the liquid separator ring 2, and the liquid separator holes 5 are uniformly set to be offset 5°-10° clockwise or counterclockwise relative to the liquid separator ring 2 radially; this allows the liquid separator ring 2 to rotate during the cleaning process, making the flushing more uniform and improving the flushing effect.

[0028] In practice, the size of the gap between the liquid reservoir 4 and the liquid separator ring 2 should be designed appropriately and should not be too large or too small. If the gap between the liquid reservoir 4 and the liquid separator ring 2 is too large, a rotating pair cannot be formed between the liquid reservoir 4 and the liquid separator ring 2, and some liquid will flow out of the gap between the liquid reservoir 4 and the liquid separator ring 2. If the flushing pressure is too high, it may damage the sealing ring. If the gap between the liquid reservoir 4 and the liquid separator ring 2 is too small, the two cannot rotate or the wear between them may be increased.

[0029] Of course, the rotary flushing of the separator ring 2 can indeed effectively increase the cleaning effect, but it is inevitable that there will be a certain amount of wear between the liquid storage tank 4 and the separator ring 2. In order to enhance the wear resistance of the separator ring 2, the material ZCuPb10Sn10 mentioned in the above embodiment can be selected to effectively increase the wear resistance of the separator ring 2, and the material of the pressure cover body 1 can be selected from ductile iron with stronger wear resistance. Compared with gray cast iron, it has higher hardness and stronger wear resistance, which can effectively increase its service life.

[0030] In summary, the present invention can achieve uniform flushing of the mechanical seal by providing evenly distributed liquid separation holes 5 on the liquid separation ring 2, ensuring uniform temperature and pressure distribution inside the mechanical seal, significantly improving the flushing effect, and extending the service life of the mechanical seal; and by setting the width of the liquid reservoir 4 and the aperture of the liquid separation holes 5 to be the same, the liquid reservoir is less likely to accumulate impurities or particles after long-term use; the liquid reservoir 4 and the liquid separation ring 2 are designed to be loosely connected, and the liquid separation holes 5 are evenly arranged with a radial offset of 5°-10° clockwise or counterclockwise relative to the liquid separation ring 2, so that the liquid separation ring 2 can rotate during the cleaning process, making the flushing more uniform and improving the flushing effect.

[0031] The above detailed description of the specific embodiments of the utility model is intended to be illustrative only, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions made to the utility model are also within the scope of the utility model. Therefore, equivalent changes, modifications, and improvements made without departing from the spirit and scope of the principles of the utility model should be included within the scope of the utility model.

Claims

1. A mechanical seal gland with uniform flushing in radial direction, characterized in that: The invention comprises a gland body (1), wherein the gland body (1) is provided with an annular groove along the circumferential direction, the annular groove and the provided liquid separation ring (2) form a liquid storage cavity (4), and a flushing connection pipe (3) is connected to the outside of the gland body (1).

2. The mechanical seal gland with uniform radial flushing according to claim 1, characterized in that: The liquid storage chamber (4) is connected to the liquid separation ring (2) through interference fit.

3. The mechanical seal gland with uniform radial flushing according to claim 1, characterized in that: The liquid separation ring (2) is provided with more than six liquid separation holes (5), and the flushing liquid can enter the interior of the mechanical seal through the liquid separation holes (5) for flushing.

4. The mechanical seal gland with uniform radial flushing according to claim 3, characterized in that: The liquid separation holes (5) are evenly arranged along the radial direction of the liquid separation ring (2).

5. The mechanical seal gland with uniform radial flushing according to claim 1, characterized in that: The material of the liquid separation ring (2) is 304 stainless steel.

6. The mechanical seal gland with uniform radial flushing according to claim 3, characterized in that: The liquid storage cavity (4) is connected to the liquid separation ring (2) through a loose fit; the liquid separation holes (5) are uniformly arranged with a radial offset of 5°-10° clockwise or counterclockwise relative to the liquid separation ring (2).

7. The mechanical seal gland with uniform radial flushing according to claim 1, characterized in that: The width of the liquid storage cavity (4) is the same as the aperture of the liquid separation hole (5).

Images