Wear-resistant mechanical seal for chemical pump

Abstract

The utility model discloses a mechanical seal for a wear-resistant chemical pump, which relates to the field of mechanical seals and comprises a pump shaft and a pump casing, a static ring groove is arranged on the side wall of the pump casing, a static ring is arranged in the static ring groove, a gland is arranged on the outer side of the pump shaft, mounting holes are arranged on the periphery of the gland and the pump casing, and mounting bolts are connected in the mounting holes. A movable ring groove is formed in the gland, a compensation spring is arranged in the movable ring groove, and the other end of the compensation spring is connected with a pressing ring. Lubricating oil is added into the oil inlet and then enters the oil storage cavity through the oil inlet, the first sealing bolt is used for sealing the oil inlet, the oil absorption cotton core is arranged in the oil storage cavity, when the oil absorption cotton core is saturated, the oil absorption cotton core gradually drips the lubricating oil to the position between the movable ring and the static ring, and due to the fact that the movable ring rotates, the oil absorption cotton core gradually drips the lubricating oil to the position between the static ring and the movable ring. Therefore, the whole static ring and the whole moving ring can be quickly expanded, lubricating oil can be conveniently added between the static ring and the moving ring, and the problem of mutual abrasion between the static ring and the moving ring is avoided.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, and particularly relates to a mechanical seal for a wear-resistant chemical pump. Background Technique

[0002] Chemical pumps are energy-saving pumps designed jointly across the country, with the following advantages: the hydraulic performance layout of the whole series is reasonable, the user has a wide selection range, the "rear-opening" structure is convenient for maintenance, and the efficiency and suction lift reach the international advanced level. Mechanical seals are the most widely used sealing forms in the chemical pump industry. Due to the advantages of less leakage and long service life, mechanical seals are the main shaft sealing methods for these devices in the world today.

[0003] At present, when using the mechanical seal of a chemical pump, due to the friction between the dynamic ring and the static ring, lubricating oil is applied between the dynamic ring and the static ring before installing the static ring and the dynamic ring. After the lubricating oil is used up, the friction between the dynamic ring and the static ring increases, and it is necessary to manually remove the mechanical seal and reapply the lubricating oil, which is too inconvenient.

[0004] Therefore, it is very necessary to invent a mechanical seal for a wear-resistant chemical pump to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a mechanical seal for a wear-resistant chemical pump to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a mechanical seal for a wear-resistant chemical pump, including a pump shaft and a pump casing. A static ring groove is provided on the side wall of the pump casing, and a static ring is arranged in the static ring groove. A gland is arranged outside the pump shaft. Mounting holes are provided on the periphery of the gland and the pump casing, and mounting bolts are connected in the mounting holes. A dynamic ring groove is provided in the gland. A compensation spring is arranged in the dynamic ring groove. The other end of the compensation spring is connected with a pressing ring. A dynamic ring is arranged on the side wall of the pressing ring. The side walls of the dynamic ring and the static ring are in contact with each other. An oil storage cavity is provided in the gland. An oil absorption cotton core is arranged in the oil storage cavity. An installation port corresponding to the oil absorption cotton core is provided between the oil storage cavity and the dynamic ring groove. An oil inlet is provided at the top of the oil storage cavity, and a first sealing bolt is threadedly connected in the oil inlet.

[0007] Preferably, a collection cavity is arranged in the gland. An oil leakage port is provided between the collection cavity and the dynamic ring groove. An oil drain port is provided at the bottom of the collection cavity, and a second sealing bolt is threadedly connected in the oil drain port.

[0008] Preferably, a first sealing groove is provided on the outer side of the static ring, and a first O-ring is arranged in the first sealing groove.

[0009] Preferably, a second sealing groove is formed in the inner side of the moving ring, and a second O-ring is arranged in the second sealing groove.

[0010] The technical effects and advantages of the present utility model:

[0011] By adding lubricating oil into the oil inlet, then entering the oil storage cavity through the oil inlet, and sealing the oil inlet by using the first sealing bolt. Since an oil absorption cotton core is arranged in the oil storage cavity, when the oil absorption cotton core is saturated, the oil absorption cotton core gradually drips lubricating oil between the moving ring and the static ring. Because the moving ring rotates, it can quickly spread to the entire static ring and moving ring, which can facilitate the addition of lubricating oil between the static ring and the moving ring, thus avoiding the problem of mutual wear between the static ring and the moving ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is a schematic diagram of the side sectional structure of the gland of the present utility model;

[0014] Figure 3 For the present utility model Figure 1 is an enlarged schematic diagram of part A.

[0015] In the figure: 1, pump shaft; 2, pump casing; 3, static ring; 4, gland; 5, mounting bolt; 6, compensation spring; 7, pressing ring; 8, moving ring; 9, oil storage cavity; 10, oil absorption cotton core; 11, oil inlet; 12, first sealing bolt; 13, collection cavity; 14, oil leakage port; 15, oil discharge port; 16, second sealing bolt; 17, first O-ring; 18, second O-ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] The present utility model provides as Figures 1 - 3A mechanical seal for a wear-resistant chemical pump shown in the figure includes a pump shaft 1 and a pump housing 2. A stationary ring groove is formed in the side wall of the pump housing 2, and a stationary ring 3 is arranged in the stationary ring groove. A gland 4 is arranged outside the pump shaft 1. Mounting holes are formed in the circumferences of the gland 4 and the pump housing 2, and mounting bolts 5 are connected in the mounting holes. A moving ring groove is formed in the gland 4, and a compensation spring 6 is arranged in the moving ring groove. The other end of the compensation spring 6 is connected with a pressing ring 7. A moving ring 8 is arranged on the side wall of the pressing ring 7. The side wall of the moving ring 8 abuts against the side wall of the stationary ring 3. An oil storage cavity 9 is formed in the gland 4, and an oil absorption cotton core 10 is arranged in the oil storage cavity 9. An installation opening corresponding to the oil absorption cotton core 10 is formed between the oil storage cavity 9 and the moving ring groove. An oil inlet 11 is formed at the top of the oil storage cavity 9, and a first sealing bolt 12 is connected to the oil inlet 11 by internal thread. By adding lubricating oil into the oil inlet 11, the lubricating oil enters the oil storage cavity 9 through the oil inlet 11, and the oil inlet 11 is sealed by using the first sealing bolt 12. Since the oil absorption cotton core 10 is arranged in the oil storage cavity 9, when the oil absorption cotton core 10 is saturated, the oil absorption cotton core 10 gradually drips lubricating oil between the moving ring 8 and the stationary ring 3. Since the moving ring 8 rotates, it can quickly spread to the entire stationary ring 3 and moving ring 8, which can facilitate the addition of lubricating oil between the stationary ring 3 and the moving ring 8, thereby avoiding the problem of mutual wear between the stationary ring 3 and the moving ring 8.

[0018] A collection cavity 13 is arranged in the gland 4. An oil leakage port 14 is formed between the collection cavity 13 and the moving ring groove. An oil drain port 15 is formed at the bottom of the collection cavity 13, and a second sealing bolt 16 is connected to the oil drain port 15 by internal thread. The excess lubricating oil in the moving ring groove enters the collection cavity 13 through the oil leakage port 14. By screwing out the second sealing bolt 16, the lubricating oil in the collection cavity 13 can be discharged through the oil drain port 15.

[0019] A first sealing groove is formed on the outer side of the stationary ring 3, and a first O-ring 17 is arranged in the first sealing groove, which can facilitate the improvement of the sealing performance of the stationary ring 3.

[0020] A second sealing groove is formed on the inner side of the moving ring 8, and a second O-ring 18 is arranged in the second sealing groove, which can facilitate the improvement of the sealing performance of the moving ring 8.

[0021] The working principle of the present utility model:

[0022] By clamping the stationary ring 3 into the stationary ring groove and installing the gland 4 using the mounting bolts 5, the compensation spring 6 inside the gland 4 pushes the pressing ring 7, and the pressing ring 7 is used to push the rotating ring 8 into contact with the stationary ring 3, thus completing the installation of the mechanical seal. By adding lubricating oil into the oil inlet 11, and then entering the oil storage chamber 9 through the oil inlet 11, and sealing the oil inlet 11 using the first sealing bolt 12. Since the oil absorption cotton core 10 is arranged in the oil storage chamber 9, when the oil absorption cotton core 10 is saturated, the oil absorption cotton core 10 gradually drips lubricating oil between the rotating ring 8 and the stationary ring 3. Because the rotating ring 8 is rotating, it can quickly spread to the entire stationary ring 3 and rotating ring 8. The excess lubricating oil in the rotating ring groove enters the collection chamber 13 through the oil leakage port 14. Unscrewing the second sealing bolt 16 can discharge the lubricating oil in the collection chamber 13 through the oil drain port 15.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wear-resistant mechanical seal for a chemical pump, comprising a pump shaft and a pump housing, characterized in that: A static ring groove is provided on the side wall of the pump housing, and a static ring is arranged in the static ring groove; a pressure cover is provided on the outer side of the pump shaft; mounting holes are provided on all sides of the pressure cover and the pump housing, and mounting bolts are connected in the mounting holes; a dynamic ring groove is provided in the pressure cover, and a compensation spring is provided in the dynamic ring groove; a clamping ring is connected to the other end of the compensation spring; a dynamic ring is provided on the side wall of the clamping ring, and the dynamic ring abuts against the side wall of the static ring; an oil storage cavity is provided in the pressure cover, and an oil absorption cotton core is provided in the oil storage cavity; an installation port corresponding to the oil absorption cotton core is provided between the oil storage cavity and the dynamic ring groove; an oil inlet is provided on the top of the oil storage cavity, and a first sealing bolt is threadedly connected to the oil inlet.

2. The wear-resistant mechanical seal for a chemical pump according to claim 1, characterized in that: A collecting chamber is arranged in the gland, an oil leakage port is arranged between the collecting chamber and the dynamic ring groove, an oil discharge port is arranged at the bottom of the collecting chamber, and a second sealing bolt is threadedly connected to the oil discharge port.

3. The wear-resistant mechanical seal for a chemical pump according to claim 1, characterized in that: A first sealing groove is formed on the outer side of the static ring, and a first O-type sealing ring is arranged in the first sealing groove.

4. The wear-resistant mechanical seal for a chemical pump according to claim 1, characterized in that: A second sealing groove is provided on the inner side of the dynamic ring, and a second O-type sealing ring is arranged in the second sealing groove.

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