Multi-spring type mechanical sealing device

Abstract

The embodiment of the utility model discloses a multi-spring type mechanical sealing device, which relates to the technical field of sealing devices, and comprises a shaft body, a gland is fixedly sleeved at one end part of the shaft body, a static sealing ring is arranged at the end part of the gland, and the end part, far away from the gland, of the static sealing ring is in plane fit with a dynamic sealing ring. The outer wall of the other end of the shaft body is fixedly connected with a shaft sleeve, and the shaft sleeve is elastically connected with the dynamic sealing ring. The extension rod is poked to drive the threaded block fixedly connected with the end of the extension rod to rotate, the other threaded block, opposite to the threaded block, in the same set is driven to rotate under the linkage effect of the linkage assembly, and the two opposite threaded blocks move oppositely when rotating synchronously due to the fact that the thread directions of the outer rings of the two threaded blocks are different. And therefore, subsequent replacement of the whole elastic assembly is facilitated, and the subsequent using effect of the mechanical sealing device is better.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of sealing devices, and in particular to a multi-spring mechanical sealing device. Background Art

[0002] A mechanical seal is a device used to prevent fluid leakage. It achieves the sealing effect by installing two relatively stationary sealing end faces on a rotating shaft. It is a rotating shaft sealing device that is widely used in various mechanical equipment, such as pumps, compressors, coal mills and other coal processing equipment.

[0003] The existing Chinese patent authorization publication number is: CN202165303U, which relates to a spring-type mechanical seal device, which is mainly used for sealing between the pump shaft and the housing of a centrifugal pump. The spring-type mechanical seal device includes a gland, a sleeve, a static sealing ring, a dynamic sealing ring and a spring. The gland is provided with a ring groove near the inner end of the ring edge, and the static sealing ring is embedded in the ring groove. One end of the dynamic sealing ring cooperates with the static sealing ring plane, and the other end abuts against one end of the spring. The other end of the spring is fixed to the sleeve, and the sleeve has a boss for supporting the spring. The spring-type mechanical seal device is suitable for promotion and application in centrifugal pumps that rotate at high speed and require sealing. It can adapt to certain centrifugal pumps with special structures. The spring-type mechanical seal device has the advantages of no impact on the structure and properties of the pump body, good sealing performance, long service life, and easy installation, replacement and maintenance. It also has the function of high-pressure self-compensating sealing.

[0004] The above-mentioned mechanical sealing device also has the following problems when in use: it is inconvenient to replace the spring in the above-mentioned mechanical sealing device, which results in the spring's elastic potential energy being weakened after being used for a long time, thereby affecting the subsequent use effect of the entire mechanical sealing device.

[0005] Therefore, it is necessary to invent a multi-spring mechanical seal device to solve the above problems. Utility Model Content

[0006] To this end, an embodiment of the present invention provides a multi-spring mechanical sealing device to solve the problem in the prior art that the elastic potential energy of the spring is weakened after a long period of use due to the inconvenience in replacing the spring in the above-mentioned mechanical sealing device, thereby affecting the subsequent use effect of the entire mechanical sealing device.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-spring mechanical seal device, comprising a shaft body, a gland fixedly mounted on one end of the shaft body, a static sealing ring disposed on the end of the gland, and an end of the static sealing ring away from the gland mating with a dynamic sealing ring; a shaft sleeve fixedly mounted on the outer wall of the other end of the shaft body, and an elastic connection being achieved between the shaft sleeve and the dynamic sealing ring; and further comprising:

[0008] The elastic component comprises a threaded groove provided inside the shaft sleeve and the dynamic sealing ring, and a threaded block is correspondingly threadedly connected inside the threaded groove, and a spring body is movably connected between two opposite threaded blocks located inside the shaft sleeve and the dynamic sealing ring, and an extension rod is fixedly connected to the end wall of the threaded block located inside the shaft sleeve, and the extension rod extends to the outside of the shaft sleeve;

[0009] The linkage assembly, the end walls of the two groups of threaded blocks connected by internal threads of the sleeve and the dynamic sealing ring are respectively fixedly connected with fixed rod 1 and fixed rod 2, and the end of fixed rod 1 is fixedly connected with a limiting protrusion, and fixed rod 1 and fixed rod 2 are movably connected.

[0010] Furthermore, in the above technical solution, the elastic components are provided in a number of groups, and the groups of elastic components are distributed in an annular shape at equal angles in the area between the shaft sleeve and the dynamic sealing ring.

[0011] Furthermore, in the above technical solution, each two threaded blocks that are threadedly connected to the internal threads of the sleeve and the dynamic sealing ring and are relatively positioned form a group, and the threads of the outer circles of the two threaded blocks in each group have opposite directions, and the thickness and number of thread turns of the threaded blocks that are threadedly connected to the internal threads of the sleeve and the dynamic sealing ring are the same. In this way, after the two threaded blocks are rotated the same number of turns, they can be synchronously separated or matched with the thread grooves in the corresponding positions, thereby ensuring the synchronization of the activities of a group of two threaded blocks.

[0012] Furthermore, in the above technical solution, the two ends of the spring body are respectively fixedly connected to the end walls of the rotating block that is rotatably connected inside each group of two opposite threaded blocks. In this way, when the threaded block is rotated, the spring body that is rotatably connected to the threaded block will not be affected by the torsional force that affects the torsion of the threaded block.

[0013] Furthermore, in the above technical solution, the rotating block is composed of a circular plate one and two blocks welded integrally to the circular plate two, and the outer ring diameter of the circular plate one is slightly larger than the outer ring diameter of the circular plate two. A spring body is fixedly connected between the opposite outer walls of the two opposite circular plates to ensure that the movable connection between the rotating block and the threaded block will not fall off.

[0014] Furthermore, in the above technical solution, the outer wall of the rotating block is in contact with the outer wall of the rotating groove preset inside the threaded block to achieve a sliding connection, which can ensure the smooth active connection between the rotating block and the corresponding threaded block, and at the same time ensure that the active connection between the rotating block and the threaded block will not fall off.

[0015] Furthermore, in the above technical solution, every two linkage components are symmetrically distributed between each group of two opposing threaded blocks.

[0016] Furthermore, in the above technical solution, the outer walls of the fixing rod 1 and the limiting protrusion fixedly connected to the end of the fixing rod 1 are in contact with the inner wall of the limiting groove preset inside the fixing rod 2 and are slidably connected, so that when the threaded block fixedly connected to the extension rod is turned, it can synchronously drive the synchronous rotation of the other threaded block arranged opposite to the threaded block, and the two threaded blocks in the group are not hindered from moving away from or towards the corresponding thread groove when they are disengaged from or matched with the corresponding thread groove.

[0017] The embodiment of the utility model has the following advantages:

[0018] The utility model drives the rotation of the threaded block fixedly connected to the end of the extension rod by toggling the extension rod, and drives the rotation of another threaded block in the same group opposite to the threaded block under the linkage action of the linkage assembly. The different thread directions of the outer rings of the two threaded blocks prompt the two relative threaded blocks to move towards each other when rotating synchronously, thereby facilitating the subsequent replacement of the entire elastic assembly, and making the subsequent use effect of the mechanical sealing device better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0021] Figure 1 A three-dimensional diagram of the overall structure provided by the utility model;

[0022] Figure 2 A three-dimensional diagram of the internal structure of the overall structure (cutaway state) provided by the utility model;

[0023] Figure 3 A three-dimensional diagram of the overall structure of the elastic component provided by the utility model;

[0024] Figure 4 An exploded view of the internal structure of the threaded block (partially cut away) provided by the present invention;

[0025] Figure 5 This is an exploded view of the connection structure of the fixing rod 1 and the fixing rod 2 provided by the utility model.

[0026] In the figure: 1. gland; 2. sleeve; 3. static sealing ring; 4. dynamic sealing ring; 5. shaft body; 6. elastic component; 601. threaded block; 602. threaded groove; 603. spring body; 604. rotating block; 6041. circular plate 1; 6042. circular plate 2; 605. rotating groove; 606. extension rod; 7. linkage component; 701. fixing rod 1; 702. fixing rod 2; 703. limiting protrusion; 704. limiting groove. DETAILED DESCRIPTION

[0027] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0028] The utility model provides Figure 1-5 The multi-spring mechanical seal device shown includes a shaft body 5, a gland 1 fixedly mounted on one end of the shaft body 5, a static sealing ring 3 disposed on the end of the gland 1, and the end of the static sealing ring 3 away from the gland 1 is in planar engagement with a dynamic sealing ring 4, and a sleeve 2 fixedly connected to the outer wall of the other end of the shaft body 5, with the sleeve 2 and the dynamic sealing ring 4 being elastically connected, and further includes:

[0029] The elastic component 6, the shaft sleeve 2, and the dynamic sealing ring 4 are all provided with a threaded groove 602, and the interior of the threaded groove 602 is correspondingly threadedly connected to a threaded block 601. A spring body 603 is movably connected between two opposing threaded blocks 601 located inside the shaft sleeve 2 and the dynamic sealing ring 4. An extension rod 606 is fixedly connected to the end wall of the threaded block 601 located inside the shaft sleeve 2, and the extension rod 606 extends to the outside of the shaft sleeve 2.

[0030] The end walls of the two groups of threaded blocks 601 connected by the internal threads of the linkage assembly 7, the sleeve 2 and the dynamic sealing ring 4 are fixedly connected with a fixing rod 1 701 and a fixing rod 2 702 respectively, and the end of the fixing rod 1 701 is fixedly connected with a limiting protrusion 703, and the fixing rod 1 701 and the fixing rod 2 702 are movably connected.

[0031] The elastic components 6 are provided in a number of groups, and the groups of elastic components 6 are distributed in an annular shape at equal angles in the area between the shaft sleeve 2 and the dynamic sealing ring 4 .

[0032] In order to ensure the removability of the elastic component 6 and facilitate subsequent maintenance, each two threaded blocks 601 that are threadedly connected to the internal threads of the sleeve 2 and the dynamic sealing ring 4 and are relatively arranged are grouped together, and the threads of the outer circles of the two threaded blocks 601 in each group are opposite, and the thickness and number of thread turns of the threaded blocks 601 that are threadedly connected to the internal threads of the sleeve 2 and the dynamic sealing ring 4 are the same. The two end portions of the spring body 603 are respectively fixedly connected to the end walls of the rotating blocks 604 that are rotatably connected to the internal threads of the two opposite threaded blocks 601 in each group. In this way, after the two threaded blocks 601 rotate the same number of turns, they can be synchronously separated or matched with the thread grooves 602 at the corresponding positions, thereby ensuring the synchronization of the activities of a group of two threaded blocks 601. At the same time, when the threaded block 601 is rotated, the spring body 603 that is rotatably connected to the threaded block 601 will not be affected by the torsional force that affects the torsion of the threaded block 601.

[0033] In order to ensure the stability of the rotation of the rotating block 604, the rotating block 604 is composed of two blocks, circular plate 1 6041 and circular plate 2 6042, which are integrally welded to circular plate 1 6041. The outer ring diameter of circular plate 1 6041 is slightly larger than the outer ring diameter of circular plate 2 6042. A spring body 603 is fixedly connected between the opposite outer walls of the two opposite circular plates 6042. The outer wall of the rotating block 604 is in contact with the outer wall of the preset rotating groove 605 inside the threaded block 601 to achieve a sliding connection. This can ensure that the rotating block 604 is smoothly connected to the corresponding threaded block 601, and at the same time ensure that the active connection between the rotating block 604 and the threaded block 601 will not fall off.

[0034] To ensure the synchronous movement of the two relatively arranged threaded blocks 601 in each group, each two linkage components 7 are symmetrically distributed between the two relatively arranged threaded blocks 601 in each group. The outer walls of the fixing rod 1 701 and the limiting protrusion 703 fixedly connected to the end of the fixing rod 1 701 are in contact with the inner wall of the limiting groove 704 preset inside the fixing rod 2 702 to achieve a sliding connection. In this way, when the threaded block 601 is turned, the rotation of one threaded block 601 can synchronously drive the synchronous rotation of the other threaded block 601 arranged opposite to the threaded block 601. At the same time, the movable connection of the two fixing rods ensures that the two threaded blocks 601 in the group can move away from and towards each other without obstruction when they disengage from or match with the corresponding thread groove 602.

[0035] By toggling the extension rod 606 to drive the threaded block 601 to rotate, another threaded block 601 in the same group opposite to the threaded block 601 rotates synchronously. The two threaded blocks 601 now move toward each other, thereby facilitating the subsequent removal and replacement of the entire elastic component 6.

[0036] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A multi-spring mechanical seal device, comprising a shaft (5), characterized in that: One end of the shaft body (5) is fixedly sleeved with a gland (1), and the end of the gland (1) is provided with a static sealing ring (3), and the end of the static sealing ring (3) away from the gland (1) is in plane cooperation with the dynamic sealing ring (4), and the outer wall of the other end of the shaft body (5) is fixedly connected with a shaft sleeve (2), and an elastic connection is achieved between the shaft sleeve (2) and the dynamic sealing ring (4), and further comprising: An elastic component (6), wherein the interiors of the shaft sleeve (2) and the dynamic sealing ring (4) are both provided with thread grooves (602), and the interiors of the thread grooves (602) are correspondingly threadedly connected to thread blocks (601), and a spring body (603) is movably connected between two opposite thread blocks (601) located inside the shaft sleeve (2) and the dynamic sealing ring (4), and an extension rod (606) is fixedly connected to the end wall of the thread block (601) located inside the shaft sleeve (2), and the extension rod (606) extends to the outside of the shaft sleeve (2); The linkage assembly (7) comprises two sets of threaded blocks (601) connected to the shaft sleeve (2) and the dynamic sealing ring (4) by internal threaded connection, and the end walls thereof are fixedly connected to a fixing rod 1 (701) and a fixing rod 2 (702), respectively, and the end of the fixing rod 1 (701) is fixedly connected to a limiting protrusion (703), and the fixing rod 1 (701) and the fixing rod 2 (702) are movably connected.

2. A multi-spring mechanical seal device according to claim 1, characterized in that: The elastic components (6) are provided in a number of groups, and the groups of elastic components (6) are distributed in an annular shape at equal angles in the area between the shaft sleeve (2) and the dynamic sealing ring (4).

3. The multi-spring mechanical seal device according to claim 1, characterized in that: The shaft sleeve (2) and the dynamic sealing ring (4) are internally threadedly connected, and each two threaded blocks (601) arranged in opposite positions form a group, and the thread directions of the outer circles of the two threaded blocks (601) in each group are opposite, and the thickness and number of thread turns of the threaded blocks (601) internally threadedly connected to the shaft sleeve (2) and the dynamic sealing ring (4) are the same.

4. The multi-spring mechanical seal device according to claim 1, characterized in that: The two ends of the spring body (603) are respectively fixedly connected to the end walls of the rotating block (604) that is rotatably connected inside each group of two opposite threaded blocks (601).

5. The multi-spring mechanical seal device according to claim 4, characterized in that: The rotating block (604) is composed of two blocks, a circular plate (6041) and a circular plate (6042) integrally welded to the circular plate (6041). The outer ring diameter of the circular plate (6041) is slightly larger than the outer ring diameter of the circular plate (6042). A spring body (603) is fixedly connected between the opposite outer walls of the two opposite circular plates (6042).

6. The multi-spring mechanical seal device according to claim 4, characterized in that: The outer wall of the rotating block (604) is in contact with the outer wall of the rotating groove (605) preset inside the threaded block (601) to achieve sliding connection.

7. The multi-spring mechanical seal device according to claim 1, characterized in that: Every two linkage components (7) are symmetrically distributed between each group of two opposing threaded blocks (601).

8. The multi-spring mechanical seal device according to claim 1, characterized in that: The outer wall of the fixing rod (701) and the limiting protrusion (703) fixedly connected to the end of the fixing rod (701) is in contact with the inner wall of the limiting groove (704) preset inside the fixing rod (702) to achieve sliding connection.

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