High-speed mechanical sealing device
By designing dynamic and static sealing units in the high-speed pump and a mechanical sealing device with the sealing cavity filled with isolation fluid, the problem of friction pair wear under high-speed operation is solved, and the stability and cost-effectiveness of long-term high-speed operation and equipment operation are achieved.
Patent Information
- Application Number
- CN202422672830.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-04
AI Technical Summary
Mechanical seals for high-speed pumps are prone to wear due to increased temperature of the friction pair and pressure friction under high linear speed conditions, resulting in decreased sealing performance and liquid leakage.
A mechanical sealing device including a dynamic sealing unit and a static sealing unit is designed. The dynamic sealing unit is sleeved on the shaft and rotates with the shaft. The static sealing unit is sleeved on the dynamic sealing unit and can rotate. A sealing cavity is formed between the two and filled with isolation fluid. The static ring is pressed against the dynamic ring through an elastic member to form a sealing pair, thereby improving the sealing performance of the friction pair.
The mechanical seal is able to operate at high speed for a long time, which prolongs the equipment maintenance and replacement cycle, reduces operating costs, and extends the continuous operation time of the equipment.
Smart Images
Figure CN223447652U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of sealing, specifically relates to a high -speed mechanical sealing device. BACKGROUND
[0002] The mechanical seal for high speed pump under high linear speed working condition, because high -speed operation can lead to friction pair temperature rise, sealing surface receives greater pressure and friction, easily cause the wear and damage of sealing friction pair. When the sealing friction pair is damaged, the sealing performance can decline, leads to the liquid in the pump body to leak. SUMMARY
[0003] The utility model discloses a high -speed mechanical sealing device can guarantee that mechanical seal can high -speed operation for a long time.
[0004] The utility model discloses the following technical scheme realizes:
[0005] A high -speed mechanical sealing device, including dynamic sealing unit and static sealing unit,
[0006] The dynamic sealing unit is sleeved on the shaft and rotates with the shaft,
[0007] The static sealing unit is sleeved on the dynamic sealing unit and can rotate relative to the dynamic sealing unit,
[0008] The dynamic sealing unit and the static sealing unit form a sealing cavity, and the sealing cavity is filled with an isolation liquid.
[0009] In a further technical scheme, the dynamic sealing unit includes a shaft sleeve and a dynamic ring.
[0010] The shaft sleeve is sleeved on the shaft, and the dynamic ring is sleeved on the shaft sleeve.
[0011] In a further technical scheme, an installation groove is provided on the outer circumferential surface of the shaft sleeve, and the dynamic ring is sleeved in the installation groove.
[0012] In a further technical scheme, a first sealing ring is provided between the dynamic ring and the shaft sleeve.
[0013] In a further technical scheme, the static sealing unit includes a gland, an elastic member, a static ring, and a push ring.
[0014] The gland is sleeved on the shaft sleeve and can rotate relative to the shaft sleeve.
[0015] The static ring and the push ring are movably arranged in the gland, one side of the push ring is connected with the static ring, and the other end is connected with the gland through the elastic member.
[0016] The elastic member makes the static ring abut against the dynamic ring.
[0017] The sealing cavity is a space formed between the static ring, the dynamic ring and the gland.
[0018] In a further technical solution, the static ring has a protrusion abutting against the dynamic ring.
[0019] In a further technical solution, the gland is provided with a collar for limiting the movement of the static ring.
[0020] In a further technical solution, a second sealing ring is arranged between the static ring and the gland.
[0021] In a further technical solution, a third sealing ring is arranged between the shaft sleeve and the shaft.
[0022] In a further technical solution, the elastic member is a spring.
[0023] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:
[0024] The high-speed mechanical sealing device, when the shaft rotates, the dynamic sealing unit rotates with the shaft, the static sealing unit is static, and sealing is formed; a sealing cavity is further formed between the dynamic sealing unit and the static sealing unit, isolation liquid is injected into the sealing cavity, mechanical sealing can be operated at high speed for a long time, the maintenance and replacement cycle of equipment is improved, operation cost is reduced, and continuous operation time of equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 The figure is a structural schematic view of the utility model;
[0026] Figure 2 The figure is Figure 1 The figure is an enlarged view of A in the figure;
[0027] Figure 3 The figure is a sectional view of the shaft sleeve;
[0028] Figure 4 The figure is a sectional view of the static ring.
[0029] Figure legend: 1-static sealing unit, 11-gland, 12-elastic member, 13-push ring, 14-static ring, 141-protrusion, 15-collar, 2-dynamic sealing unit, 21-shaft sleeve, 21a-mounting groove, 22-dynamic ring, 3-sealing cavity, 4-first sealing ring, 5-second sealing ring, 6-third sealing ring. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0032] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying the importance of the opposite. They are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.
[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.
[0035] Please refer to Figures 1-4 A high-speed mechanical sealing device, comprising a dynamic sealing unit 2 and a static sealing unit 1.
[0036] As Figure 1As shown, the dynamic sealing unit 2 is sleeved on the shaft and rotates with the shaft, and the static sealing unit 1 is sleeved on the dynamic sealing unit 2 and can rotate relative to the dynamic sealing unit 2; the dynamic sealing unit 2 and the static sealing unit 1 form a friction pair in close contact, and an effective sealing layer is formed through the action of friction and pressure.
[0037] The sealing cavities 3 are formed between the dynamic sealing unit 2 and the static sealing unit 1, and are filled with isolation liquid, so that the mechanical seal can operate at high speed for a long time.
[0038] Specifically, as shown in the figure, Figures 2-4 The dynamic sealing unit 2 includes a shaft sleeve 21 and a dynamic ring 22, and the static sealing unit 1 includes a gland 11, an elastic member 12, a static ring 14 and a push ring 13.
[0039] The shaft sleeve 21 is sleeved on the shaft and rotates with the shaft, the dynamic ring 22 is sleeved on the shaft sleeve 21 and rotates with the shaft sleeve 21, the gland 11 is sleeved on the shaft sleeve 21 and can rotate relative to the shaft sleeve 21, a cavity is formed between the gland 11 and the shaft sleeve 21, and the dynamic ring 22 is located in the cavity; the static ring 14 and the push ring 13 are movably arranged in the gland 11, i.e. in the cavity formed by the gland 11 and the shaft sleeve 21, one side of the push ring 13 is connected with the static ring 14, and the other end is connected with the gland 11 through the elastic member 12; under the action of the elastic potential energy of the elastic member 12, the static ring 14 tightly abuts against the dynamic ring 22, a friction pair is formed between the static ring 14 and the dynamic ring 22, and the elastic member 12 also increases the pressure between the static ring 14 and the dynamic ring 22, thereby increasing the sealing performance.
[0040] The sealing cavities 3 are spaces formed between the static ring 14, the dynamic ring 22 and the gland 11, and can be filled with isolation liquid, so that the mechanical seal can operate at high speed for a long time.
[0041] In this embodiment, the outer circumferential surface of the shaft sleeve 21 is provided with a mounting groove 21a, and the dynamic ring 22 is sleeved in the mounting groove 21a, so as to better fix the dynamic ring 22 on the shaft sleeve 21 and rotate synchronously with the shaft sleeve 21.
[0042] In this embodiment, the static ring 14 has a protrusion 141 abutting against the dynamic ring 22, so as to better abut against the dynamic ring 22.
[0043] In this embodiment, the gland 11 is provided with a clasp 15, which can limit the movement of the static ring 14.
[0044] In this embodiment, the elastic member 12 is a spring, and the number thereof can be flexibly set according to the use requirement.
[0045] As shown in the figure, Figure 2 A first sealing ring 4 is arranged between the dynamic ring 22 and the shaft sleeve 21, so as to increase the sealing performance between the dynamic ring 22 and the shaft sleeve 21.
[0046] As shown in Figure 2 The second sealing ring 5 is arranged between the static ring 14 and the gland 11, so that the sealing performance between the static ring 14 and the gland 11 is improved.
[0047] As shown in Figure 2 The third sealing ring 6 is arranged between the shaft sleeve 21 and the shaft, so that the sealing performance between the shaft sleeve 21 and the shaft is improved.
[0048] The working principle of the embodiment is as follows:
[0049] When the shaft rotates, the shaft sleeve 21 and the dynamic ring 22 rotate with the shaft, the gland 11 is static, and the elastic member 12 is used to press the static ring 14 on the dynamic ring 22, so that a sealing pair is formed between the static ring 14 and the dynamic ring 22, and a sealing structure is formed; a sealing cavity 3 is formed between the static ring 14, the dynamic ring 22 and the gland 11, and the isolation liquid is injected into the sealing cavity 3, so that the mechanical seal can be operated at high speed for a long time, the maintenance and replacement period of the equipment is improved, the operation cost is reduced, and the continuous operation time of the equipment is prolonged.
[0050] The preferred embodiment of the utility model is only used for limiting the utility model, and the utility model can be changed and varied for the skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A high-speed mechanical sealing device, characterized in that: Including dynamic sealing unit and static sealing unit; The dynamic sealing unit is sleeved on the shaft and rotates with the shaft; The static sealing unit is sleeved on the dynamic sealing unit and can rotate relative to the dynamic sealing unit; A sealing cavity is formed between the dynamic sealing unit and the static sealing unit, and the sealing cavity is filled with an isolation liquid; the dynamic sealing unit includes a shaft sleeve and a dynamic ring; The shaft sleeve is sleeved on the shaft, and the dynamic ring is sleeved on the shaft sleeve; The static sealing unit includes a gland, an elastic member, a static ring and a push ring; The gland is sleeved on the shaft sleeve and can rotate relative to the shaft sleeve; The static ring and the push ring are movably arranged in the gland, one end of the push ring is connected to the static ring, and the other end is connected to the gland via the elastic member; The elastic member causes the static ring to press against the dynamic ring; The sealing cavity is the space formed between the static ring, the dynamic ring and the gland; The stationary ring has a protrusion, and the protrusion abuts against the dynamic ring.
2. A high-speed mechanical sealing device according to claim 1, characterized in that: An installation groove is provided on the outer peripheral surface of the shaft sleeve, and the dynamic ring is sleeved in the installation groove.
3. A high-speed mechanical sealing device according to claim 1, characterized in that: A first sealing ring is provided between the dynamic ring and the shaft sleeve.
4. A high-speed mechanical sealing device according to claim 1, characterized in that: A clamping ring is provided in the gland, and the clamping ring is used to limit the movement of the static ring.
5. A high-speed mechanical sealing device according to claim 1, characterized in that: A second sealing ring is provided between the static ring and the gland.
6. A high-speed mechanical sealing device according to claim 1, characterized in that: A third sealing ring is provided between the shaft sleeve and the shaft.
7. A high-speed mechanical sealing device according to claim 1, characterized in that: The elastic member is a spring.