Compensation ring combination axial limiting structure for mechanical seal

Abstract

The utility model relates to a compensation ring combination axial limiting structure for a mechanical seal, the mechanical seal is sleeved on a main shaft and comprises a compensation ring, a compensation ring seat and a non-compensation ring, the compensation ring seat is fixed with an end cover of the mechanical seal, the compensation ring is fixed on the compensation ring seat, the compensation ring is attached to the non-compensation ring, and the non-compensation ring is fixed on the compensation ring seat. The tail end of the compensation ring abuts against the top end of the compensation ring seat, at least one clamping plate is fixed to the outer side of the compensation ring seat and comprises a first edge and a second edge which are perpendicular to each other, the first edge is parallel to the spindle, the second edge points to the axis of the spindle, the tail end of the first edge is fixed to the compensation ring seat, and a step is arranged on the outer side of the middle of the compensation ring. The second edge restricts axial movement of the step toward the leading end. According to the utility model, through the design of the two limiting structures, the cavity and the end cover are integrated, the installation efficiency is greatly improved, and meanwhile, the compensation ring is prevented from popping out in the installation process and being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a compensation ring combined axial limiting structure for mechanical seals. Background Art

[0002] For mechanical seals used in high-pressure transmission mechanisms, a sealing structure consisting of a compensation ring and a non-compensation ring is often added to the mechanical seal, and the compensating ring and the non-compensating ring are kept in contact with each other by a spring. For high-pressure, large-diameter mechanical seals, the spring force is generally large, so the force acting on the compensation ring combination is very large, which makes the installation process very troublesome and often requires the coordination of multiple people to complete the overall installation. In addition, the compensation ring is easy to pop out during the installation process, causing the compensation ring to break. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a compensation ring combined axial limiting structure for mechanical seal.

[0004] In order to achieve the purpose of the utility model, the present application provides the following technical solutions.

[0005] In the first aspect, the present application provides a compensation ring combined axial limiting structure for mechanical seal, wherein the mechanical seal sleeve is arranged on the main shaft and includes a compensation ring, a compensation ring seat and a non-compensation ring, the compensation ring seat is fixed to the end cover of the mechanical seal, the compensation ring is fixed on the compensation ring seat, the compensation ring and the non-compensation ring are fitted, the tail end of the compensation ring abuts against the top end of the compensation ring seat, at least one clamping plate is fixed on the outer side of the compensation ring seat, the clamping plate includes a first side and a second side that are perpendicular to each other, wherein the first side is parallel to the main shaft, the second side points to the axis of the main shaft, the tail end of the first side is fixed to the compensation ring seat, a step is provided on the outer side of the middle part of the compensation ring, and the second side limits the axial movement of the step toward the front end.

[0006] In an implementation manner of the first aspect, the tail end of the first side is fixed to the compensation ring seat by a cross countersunk screw.

[0007] In an implementation of the first aspect, a liquid separator ring is provided in the cavity of the mechanical seal, and an inner wall of the liquid separator ring is provided with a lug pointing to the axis of the main shaft, and the lug limits the axial movement of the compensation ring seat toward the front end.

[0008] In an implementation manner of the first aspect, the lug is annularly and integrally arranged on the inner wall of the liquid separating ring, or a plurality of lugs are provided and uniformly fixed on the inner wall of the liquid separating ring.

[0009] In one implementation of the first aspect, the compensation ring and the compensation ring seat are connected via a first anti-rotation pin, and a first spring loading ring is provided between the compensation ring and the compensation ring seat.

[0010] In one implementation of the first aspect, a second anti-rotation pin is provided between the compensation ring seat and the end cover, and a second spring-loaded ring is used to seal the two.

[0011] In one implementation of the first aspect, a spring is provided between the compensation ring seat and the end cover.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] On the one hand, the present application limits the axial displacement of the compensation ring by fixing a clamping plate on the compensation ring seat, and on the other hand, limits the axial displacement of the compensation ring seat by processing a lug on the liquid separator ring fixed on the cavity, thereby greatly improving the installation efficiency and preventing the compensation ring from popping out during the installation process, causing the compensation ring to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the limiting structure of the present application at a certain angle;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the limiting structure of the present application at another angle.

[0016] In the accompanying drawings, 1 is a cavity, 2 is an end cover, 3 is a compensation ring, 4 is a compensation ring seat, 5 is a non-compensation ring, 6 is a liquid separator ring, 7 is a lug, 8 is a retaining ring, 9 is a second anti-rotation pin, 10 is a first spring loading ring, 11 is a second spring loading ring, 12 is a spring, 13 is a hexagon socket screw, 14 is an O-ring, 15 is a first side, 16 is a second side, 17 is a step, 18 is a cross recessed countersunk screw, and 19 is a first anti-rotation pin. DETAILED DESCRIPTION

[0017] Unless otherwise defined, the technical terms or scientific terms used in this specification and claims shall have the ordinary meanings understood by persons with ordinary skills in the technical field to which the utility model belongs. All the values ​​from the lowest value to the highest value listed in this article refer to all the values ​​obtained by incrementing one unit between the lowest value and the highest value when the difference between the lowest value and the highest value is more than two units.

[0018] The following will describe the specific implementation of the utility model. It should be noted that in the specific description of these implementations, in order to provide a concise description, this specification cannot provide a detailed description of all the features of the actual implementation. Without departing from the spirit and scope of the utility model, those skilled in the art may modify and replace the implementation of the utility model, and the resulting implementation is also within the scope of protection of the utility model.

[0019] The purpose of the present application is to provide an axial limiting structure of a compensation ring combination, which can make full use of the existing components of the mechanical seal and realize the axial limiting of the compensation ring combination (compensation ring and compensation ring seat) under the condition of limited space size, so that the static parts of the mechanical seal are integrated together as a whole, solving the problem of difficulty in overall installation of the non-integrated structure of the static parts and eliminating the hidden danger of the compensation ring being easily ejected and broken during the installation process of the non-integrated structure.

[0020] In a specific embodiment, the present application provides a compensation ring combined axial limiting structure for mechanical seal, the mechanical seal sleeve is arranged on the main shaft, and includes a compensation ring, a compensation ring seat and a non-compensation ring, the compensation ring seat is fixed to the end cover of the mechanical seal, the compensation ring is fixed to the compensation ring seat, the compensation ring and the non-compensation ring fit together, the tail end of the compensation ring abuts against the top end of the compensation ring seat, at least one clamping plate is fixed on the outside of the compensation ring seat, the clamping plate includes a first side and a second side perpendicular to each other, wherein the first side is parallel to the main shaft, the second side points to the main shaft axis, the tail end of the first side is fixed to the compensation ring seat, a step is provided on the outside of the middle part of the compensation ring, and the second side limits the axial movement of the step toward the front end. The compensation ring and the compensation ring seat are axially limited by the clamping plate installed on the compensation ring seat.

[0021] In a specific implementation, the tail end of the first side is fixed to the compensation ring seat by a cross countersunk screw.

[0022] In a specific embodiment, a separator ring is provided in the cavity of the mechanical seal, and the inner wall of the separator ring is provided with a lug pointing to the axis of the main shaft, and the lug limits the axial movement of the compensation ring seat toward the front end. The separator ring is actually a common component in general mechanical seals. The mechanical seal needs to be regularly flushed with water, so a flushing liquid inlet is provided on the cavity of the mechanical seal, and the interior of the cavity is connected through a flushing channel. However, since the interior of the mechanical seal is annular and there is only one flushing liquid inlet, the flushing liquid cannot enter the interior of the mechanical seal evenly. Therefore, a separator ring is provided, and a number of through holes are evenly provided on the separator ring. After the flushing liquid enters the interior of the mechanical seal, it cannot enter directly due to the obstruction of the separator ring, and can only enter through a number of through holes. This is the basic function of the separator ring. However, the inner wall of the current separator ring is smooth. The lug provided on the inner wall of the present application can play the role of limiting the compensation ring seat.

[0023] The compensation ring and the compensation ring seat are axially limited by the cardboard installed on the compensation ring seat, and the axial limit of the compensation ring seat is limited by the lug processed on the liquid separator ring. Through the design of two limiting structures, the compensation ring, compensation ring seat, cavity, end cover and the parts between them are integrated into one, which greatly improves the installation efficiency and avoids the risk of the compensation ring popping out and breaking during the installation process.

[0024] In a specific embodiment, the lug is annularly arranged on the inner wall of the liquid separator ring, or a plurality of lugs are provided and evenly fixed on the inner wall of the liquid separator ring.

[0025] In a specific embodiment, the compensation ring is connected to the compensation ring seat via a first anti-rotation pin, and a first spring loading ring is provided between the compensation ring and the compensation ring seat.

[0026] In a specific embodiment, a second anti-rotation pin is provided between the compensation ring seat and the end cover, and a second spring-loaded ring is used to seal the two.

[0027] In a specific embodiment, a spring is provided between the compensation ring seat and the end cover.

[0028] Example

[0029] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0030] Example 1

[0031] A compensating ring combined axial limiting structure for mechanical seal, the structure of which is as follows Figure 1 , Figure 2As shown, Figure 1 What is shown is the limiting structure between the compensation ring 3 and the compensation ring seat 4. Figure 2 The display shows the limiting structure between the compensation ring seat 4 and other mechanical seal structures (liquid separator ring). The details are as follows:

[0032] The compensation ring 3 is installed on the compensation ring seat 4, and the first spring loading ring 10 is used to seal the two. At the same time, the first anti-rotation pin 19 is used to prevent the two from rotating. A clamping plate is fixed on the compensation ring seat 4 by a cross recessed countersunk screw 18. The clamping plate includes a first side 15 and a second side 16 that are perpendicular to each other, wherein the first side 15 is parallel to the main shaft, and the second side 16 points to the main shaft axis. The tail end of the first side 15 is fixed to the compensation ring seat 4 by a cross recessed countersunk screw 18. A step 17 is provided on the outer side of the middle part of the compensation ring 3, and the second side 16 limits the axial movement of the step 17 toward the front end, thereby playing the role of axial limiting of the compensation ring 3. Figure 1 shown.

[0033] The liquid separator ring 6 is installed on the cavity 1, and the two are fixed by a clamp ring 8. A plurality of lugs 7 are processed on the inner wall of the liquid separator ring 6. The lugs 7 limit the axial movement of the compensation ring seat 4 toward the front end, and at this time play the role of axial limit of the compensation ring seat 4. Figure 2 shown.

[0034] The compensation ring seat 4 is installed on the end cover 2, and the two are sealed by the second spring loading ring 11. At the same time, the two are prevented from rotating by the second anti-rotation pin 9. The cavity 1 and the end cover 2 are connected as a whole by the hexagon socket screw 13, and the two are sealed by the O-ring 14. The springs 12 are evenly installed in the holes of the end cover 2. The force of the springs 12 acts on the compensation ring seat 4. In the working state of the mechanical seal, the compensation ring 3 is pressed against the non-compensation ring 5 to play a compensation role.

[0035] The above are all stationary parts of the mechanical seal. It can be seen that through the design of two limiting structures, the entire stationary part is integrated into one.

[0036] The unmarked parts in the figure are parts of a general mechanical seal structure, which are used to form the seal as a whole and to ensure the necessary structure for normal operation of the seal, and have no necessary connection with the content of this application.

[0037] The most important part of this patent is the design of two limiting structures. First, the axial displacement of the compensation ring 3 is limited by a clamp fixed on the compensation ring seat 4. Second, the axial displacement of the compensation ring seat 4 is limited by machining a lug 7 on the liquid separator ring 6 fixed on the cavity 1. At this time, the compensation ring 3 combination (i.e., the compensation ring 3 and the compensation ring seat 4) is integrated with the cavity 1 and the end cover 2 through the design of two limiting structures, which greatly improves the installation efficiency and prevents the compensation ring 3 from popping out during the installation process, causing the compensation ring 3 to be broken.

[0038] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A compensation ring combined axial limiting structure for mechanical seal, wherein the mechanical seal sleeve is arranged on the main shaft and comprises a compensation ring, a compensation ring seat and a non-compensation ring, wherein the compensation ring seat is fixed to the end cover of the mechanical seal, the compensation ring is fixed to the compensation ring seat, and the compensation ring and the non-compensation ring are fitted together, characterized in that: The tail end of the compensation ring abuts against the top end of the compensation ring seat, and at least one clamping plate is fixed on the outside of the compensation ring seat, and the clamping plate includes a first side and a second side that are perpendicular to each other, wherein the first side is parallel to the main axis, and the second side points to the axis of the main axis, and the tail end of the first side is fixed to the compensation ring seat, and a step is provided on the outside of the middle part of the compensation ring, and the second side limits the axial movement of the step toward the front end.

2. The compensation ring combined axial limiting structure for mechanical seal according to claim 1, characterized in that: The tail end of the first side is fixed to the compensation ring seat by a cross countersunk screw.

3. The compensation ring assembly axial limiting structure for mechanical seal according to claim 1, characterized in that: A liquid separator ring is arranged in the cavity of the mechanical seal, and a lug pointing to the axis of the main shaft is arranged on the inner wall of the liquid separator ring, and the lug limits the axial movement of the compensation ring seat toward the front end.

4. The compensation ring combined axial limiting structure for mechanical seal according to claim 3, characterized in that: The lug is annularly arranged on the inner wall of the liquid separator ring, or a plurality of lugs are provided and evenly fixed on the inner wall of the liquid separator ring.

5. The compensation ring combined axial limiting structure for mechanical seal according to claim 1, characterized in that: The compensation ring is connected to the compensation ring seat via a first anti-rotation pin, and a first spring loading ring is provided between the compensation ring and the compensation ring seat.

6. The compensation ring combined axial limiting structure for mechanical seal according to claim 1, characterized in that: A second anti-rotation pin is provided between the compensation ring seat and the end cover, and a second spring-loaded ring is used to seal the two.

7. The compensation ring assembly axial limiting structure for mechanical seal according to claim 6, characterized in that: A spring is arranged between the compensation ring seat and the end cover.

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