Mounting structure of built-in single-end-face mechanical seal for pump

Abstract

The utility model discloses a mounting structure of a built-in single-end-face mechanical seal for a pump, which comprises a shaft sleeve and a hoop, one side of the outer side of the shaft sleeve is sleeved with a spring seat, the other side of the outer side of the shaft sleeve is sleeved with a static ring seat, one side of the inner side of the spring seat is sleeved with a moving ring, one side of the moving ring is provided with a fixing piece, and the other side of the moving ring is provided with a sealing ring. A spring is arranged on one side of the fixing piece, a static ring is arranged on the inner side of the static ring base in a sleeved mode, and a positioning block is arranged on one side of the static ring. According to the utility model, through the mutual matching among the static ring seat, the hoop, the static ring, the fixed sheet, the spring, the shaft sleeve, the spring seat and the movable ring, when the device is used for installing the mechanical seal, the mechanical seal, the shaft sleeve and the static ring seat can be pre-installed through the hoop, and the mutual positions are pre-locked, so that the mechanical seal is easy to install and does not shift or slip off; the installation quality is guaranteed, installation of the built-in single-end-face mechanical seal can be completed at a time, labor is saved, and the quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of machine seal installation, in particular to an installation structure of a built-in single-end face machine seal for a pump. Background Art

[0002] Mechanical seal, also called end face seal, refers to a device to prevent fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, which are kept in close contact and slide relative to each other under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of auxiliary seals. When installing the built-in single end face mechanical seal of the centrifugal pump, the dynamic ring is easy to slip off and is not easy to find. Sometimes, after the pump is installed, water leakage will be found when it is turned on;

[0003] The existing patent with the authorization announcement number "CN208138188U" discloses a single-end internal mechanical seal for a centrifugal pump. It can prevent the leakage of cooling water by slightly modifying the internal mechanical seal of the pump, and improve the service life of the cooling water seal ring without increasing the production cost; by changing the aperture of the cooling water inlet and outlet, it can save 50-80% of cooling water, which has a good water-saving effect;

[0004] However, there are the following deficiencies in this device:

[0005] The moving ring and spring seat of the above-mentioned built-in single-end face mechanical seal are detachable. The two are connected by a groove or a transmission pin, and then fixed together with the shaft sleeve by the fixing pins on the spring seat. This assembly is unstable. If the moving ring is not paid attention to during the flipping movement, it will shift and slide, causing the groove to be misaligned and misplaced, and unable to lock with the shaft sleeve, resulting in mutual movement, causing damage to the mechanical seal and leakage. Summary of the invention

[0006] The utility model aims to provide a mounting structure of a built-in single-end mechanical seal for a pump, so as to solve the existing problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an installation structure of an internal single-end face mechanical seal for a pump, comprising a shaft sleeve and a clamp, a spring seat is sleeved on one side of the outer side of the shaft sleeve, a static ring seat is sleeved on the other side of the outer side of the shaft sleeve, a dynamic ring is sleeved on one side of the inner side of the spring seat, a fixing plate is provided on one side of the dynamic ring, a spring is provided on one side of the fixing plate, a static ring is sleeved on the inner side of the static ring seat, a positioning block is provided on one side of the static ring, a positioning groove matching with the positioning block is provided on the side of the dynamic ring close to the static ring, a sealing ring is provided at the edge of one side of the inner side of the positioning groove, and a sealing groove matching with the sealing ring is provided at the edge of one side of the positioning block.

[0008] Preferably, a bolt is provided at the top of one side of the clamp, and a nut matching with the bolt is provided at the top of the other side of the clamp for locking the clamp.

[0009] Preferably, limiting pins are provided at the top and bottom of one side of the spring seat, and limiting grooves are provided at the top and bottom of the moving ring, so that the spring seat can limit the moving ring.

[0010] Preferably, a sealing ring A is provided at the edge of the static ring away from the positioning block to improve the sealing performance of the mechanical seal.

[0011] Preferably, a sealing ring B is provided on the inner side of the moving ring away from the positioning groove to improve the sealing performance of the mechanical seal.

[0012] Preferably, the positioning block is in the shape of a truncated cone, and the positioning groove is matched with the positioning block, which facilitates the rapid docking of the static ring and the dynamic ring and improves the tightness of the docking.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the installation structure of the pump internally mounted single-end face mechanical seal;

[0014] 1. Through the cooperation between the stationary ring seat, clamp, stationary ring, fixing plate, spring, sleeve, spring seat and dynamic ring, the device can pre-install the machine seal, sleeve and stationary ring seat through the clamp when installing the machine seal, and pre-lock the positions between them, making the installation of the machine seal easy and prevent it from shifting and sliding, ensuring the installation quality, and enabling the installation of the built-in single-end face machine seal to be completed in one go, saving labor and ensuring quality;

[0015] 2. Through the cooperation between the positioning block, the sealing groove, the sealing ring and the positioning groove, when the device is docking the dynamic ring and the static ring, the positioning groove and the positioning block can be engaged and positioned, which speeds up the docking speed. At the same time, the sealing ring can be inserted into the sealing groove to strengthen the sealing of the docking point and improve the docking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is a front cross-sectional view of the utility model;

[0018] Figure 3 It is a side sectional view of the utility model;

[0019] Figure 4 For the utility model Figure 2 A schematic diagram of the enlarged structure of .

[0020] In the figure: 1. stationary ring seat; 2. clamp; 3. stationary ring; 4. fixing plate; 5. spring; 6. bushing; 7. spring seat; 8. moving ring; 9. positioning block; 10. sealing groove; 11. sealing ring; 12. positioning groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides an embodiment of a mounting structure of a built-in single-end face mechanical seal for a pump, comprising a sleeve 6 and a clamp 2, a spring seat 7 is sleeved on one side of the outer side of the sleeve 6, a static ring seat 1 is sleeved on the other side of the outer side of the sleeve 6, a dynamic ring 8 is sleeved on one side of the inner side of the spring seat 7, a fixing plate 4 is arranged on one side of the dynamic ring 8, a spring 5 is arranged on one side of the fixing plate 4, a static ring 3 is sleeved on the inner side of the static ring seat 1, a positioning block 9 is arranged on one side of the static ring 3, a sealing ring A is arranged at the edge of the static ring 3 away from the positioning block 9, which can improve the sealing performance of the mechanical seal, a positioning groove 12 matched with the positioning block 9 is arranged on the side of the dynamic ring 8 close to the static ring 3, a sealing ring B is arranged on the inner side of the side of the dynamic ring 8 away from the positioning groove 12, which can improve the sealing performance of the mechanical seal, a sealing ring 11 is arranged on the edge of one side of the inner side of the positioning groove 12, and a sealing groove 10 matched with the sealing ring 11 is opened on the edge of one side of the positioning block 9.

[0023] Furthermore, a bolt is provided at the top of one side of the clamp 2, and a nut matching the bolt is provided at the top of the other side of the clamp 2. A screwdriver can be used to rotate the bolt and the nut thread to lock the clamp 2 on the outside of the sleeve 6 to lock the position of the stationary ring seat 1.

[0024] Furthermore, a limit pin is provided at the top and bottom of one side of the spring seat 7, and a limit groove is provided at the top and bottom of the moving ring 8. When the moving ring 8 is assembled, the limit block can be inserted into the limit groove.

[0025] Furthermore, the positioning block 9 is truncated cone-shaped, and the positioning groove 12 is matched with the positioning block 9, which facilitates the rapid docking of the static ring 3 and the dynamic ring 8 and improves the tightness of the docking.

[0026] Working principle: When installing the machine seal, the fixing plate 4 and the spring 5 can be first installed into the inner side of the spring seat 7, and then the spring seat 7 can be positioned on the shaft sleeve and locked, and then the dynamic ring 8 can be installed on the shaft sleeve and engaged with the spring seat 7 to form an assembly. After the static ring 3 is installed in the static ring seat 1, the assembly can be mounted on the static ring seat 1. At this time, the static ring 3 and the dynamic ring 8 can be quickly positioned through the engagement of the positioning groove 12 and the positioning block 9. After the engagement, the sealing ring 11 can be engaged in the sealing groove 10 to ensure the sealing of the docking surface. After the docking is completed, press the static ring seat 1 hard to make the shaft sleeve 6 extend a part from the inner side of the static ring seat 1, and then the clamp 2 can be put on the shaft sleeve of the protruding part, and then use a screwdriver to tighten the bolts and nuts to fix the static ring seat 1. In this way, the machine seal, shaft sleeve, and static ring seat are tightly fitted together to form an assembly. In the subsequent installation, they will never be misplaced. After the pump is installed, the clamp can be removed.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A mounting structure for a built-in single-end mechanical seal for a pump, comprising a shaft sleeve (6) and a clamp (2), characterized in that: A spring seat (7) is sleeved on one side of the outer side of the shaft sleeve (6), a stationary ring seat (1) is sleeved on the other side of the outer side of the shaft sleeve (6), a dynamic ring (8) is sleeved on one side of the inner side of the spring seat (7), a fixing plate (4) is provided on one side of the dynamic ring (8), a spring (5) is provided on one side of the fixing plate (4), a stationary ring (3) is sleeved on the inner side of the stationary ring seat (1), a positioning block (9) is provided on one side of the stationary ring (3), a positioning groove (12) matching with the positioning block (9) is provided on the side of the dynamic ring (8) close to the stationary ring (3), a sealing ring (11) is provided on the edge of one side of the inner side of the positioning groove (12), and a sealing groove (10) matching with the sealing ring (11) is provided on the edge of one side of the positioning block (9).

2. The installation structure of a built-in single-end mechanical seal for a pump according to claim 1, characterized in that: A bolt is arranged at the top of one side of the clamp (2), and a nut matching the bolt is arranged at the top of the other side of the clamp (2).

3. The installation structure of a built-in single-end mechanical seal for a pump according to claim 1, characterized in that: Limiting pins are provided at the top and bottom of one side of the spring seat (7), and limiting grooves are provided at the top and bottom of the moving ring (8).

4. The installation structure of a built-in single-end mechanical seal for a pump according to claim 1, characterized in that: A sealing ring A is provided at the edge of the stationary ring (3) on the side away from the positioning block (9).

5. The installation structure of a built-in single-end mechanical seal for a pump according to claim 1, characterized in that: A sealing ring B is provided on the inner side of the moving ring (8) away from the positioning groove (12).

6. The installation structure of a built-in single-end mechanical seal for a pump according to claim 1, characterized in that: The positioning block (9) is in the shape of a truncated cone, and the positioning groove (12) is adapted to the positioning block (9).

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