Metal anti-rotating pin device with nylon protective sleeve
By installing a nylon protective sleeve on the anti-rotation device, the fragility problem of the static ring during high-speed operation is solved, and the protection of the anti-rotation pin groove and the anti-rotation device is achieved, collision and cracking are avoided, and the integrity of the static ring is ensured.
Patent Information
- Application Number
- CN202422153574.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing mechanically sealed static rings are fragile when running at high speed and have poor impact resistance, resulting in collision and cracking of anti-rotation pin grooves and anti-rotation devices, and even the overall static rings are broken.
A nylon protective sleeve is installed on the anti-rotation device, and the high density and toughness of the nylon protective sleeve absorb the centrifugal impact force to avoid direct collision between the anti-rotation pin groove and the anti-rotation device.
Effectively absorb and buffer centrifugal impact force, prevent cracking of anti-rotation pin grooves and anti-rotation device, and protect the static ring from being damaged.
Smart Images
Figure CN223076236U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-rotation pin devices, in particular to a metal anti-rotation pin device with a nylon protective sleeve. Background Art
[0002] Currently, the materials of the stationary rings used in mechanical seals are mostly graphite and silicon carbide, and the disadvantages of graphite and silicon carbide are that they are fragile and have poor impact resistance. When the pump is running at high speed, if the movement of the stationary ring is not restricted, the stationary ring will rotate together with the rotating ring, which will cause serious wear and even fracture of the auxiliary seal of the stationary ring. The stationary ring will also hit other metal parts during the operation of the pump, resulting in the fragmentation of the stationary ring and leakage of the mechanical seal. Therefore, an anti-rotation device needs to be set in the stationary ring, and a commonly used anti-rotation device is a metal anti-rotation pin. However, when the pump starts or stops, or when the vibration of the pump during operation is relatively large, a large centrifugal impact force will be generated on the stationary ring, and the anti-rotation pin groove of the stationary ring and the anti-rotation device will collide with each other, causing the anti-rotation pin groove of the stationary ring to crack, and even the entire stationary ring to break. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a metal anti-rotation pin device with a nylon protective sleeve, which solves the problem that when the pump generates a centrifugal impact force on the stationary ring, it will cause the anti-rotation pin groove and the anti-rotation device to collide, resulting in cracking or even the entire stationary ring breaking, as mentioned in the background art.
[0004] The utility model adopts the following technical solutions:
[0005] A metal anti-rotation pin device with a nylon protective sleeve of the utility model includes a stationary ring and a stationary ring seat. The stationary ring seat is sleeved on the outside of the stationary ring. A through hole is provided on the stationary ring seat. An anti-rotation pin groove is provided on the stationary ring. The opening position of the anti-rotation pin groove corresponds to the through hole. An anti-rotation device is provided in the through hole. The lower part of the anti-rotation device is arranged in the anti-rotation pin groove. A nylon protective sleeve is sleeved on the outside of the anti-rotation device in the anti-rotation pin groove.
[0006] Further, a stationary ring O-ring is arranged between the contact surfaces of the stationary ring and the stationary ring seat.
[0007] Further, a stationary ring boss is arranged on the outer side wall of the stationary ring, and a stationary ring seat boss is arranged on the inner side wall of the stationary ring seat. The stationary ring boss and the stationary ring seat boss enclose a docking cavity, and the stationary ring O-ring is arranged in the docking cavity.
[0008] Further, the stationary ring seat boss is an annular boss, and the stationary ring boss is an annular boss.
[0009] Still further, the anti-rotation device is a metal anti-rotation pin.
[0010] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:
[0011] A nylon protective sleeve is sleeved on the part of the anti-rotation device located in the anti-rotation pin groove of the present utility model. The nylon protective sleeve has a higher density structure, is not easily broken by external forces, has good impact resistance, has excellent toughness and tensile strength, is easy to stretch and quickly return to its original state when subjected to impact, thereby absorbing the impact, and has strong machining properties. By sleeving the nylon protective sleeve on the anti-rotation device, it can absorb and buffer the centrifugal impact force, avoiding the problems of cracking or even the overall fragmentation of the stationary ring caused by the direct collision between the anti-rotation pin groove and the anti-rotation device. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present utility model will be further described below in conjunction with the drawings.
[0013] Figure 1 It is the front view of the metal anti-rotation pin device with a nylon protective sleeve in Embodiment 1 of the present utility model;
[0014] Figure 2 It is the left view of the metal anti-rotation pin device with a nylon protective sleeve in Embodiment 1 of the present utility model;
[0015] Figure 3 It is the schematic structural view of the stationary ring seat and the stationary ring in the metal anti-rotation pin device with a nylon protective sleeve in Embodiment 1 of the present utility model;
[0016] Description of reference numerals: 1, stationary ring seat; 1-1, convex platform of the stationary ring seat; 2, stationary ring; 2-1, convex platform of the stationary ring; 3, O-ring of the stationary ring; 4, anti-rotation device; 5, nylon protective sleeve; 6, through hole; 7, anti-rotation pin groove; 8, docking cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clearly understood, the present utility model will be further described in detail below in conjunction with the drawings and embodiments.
[0018] As Figures 1 to 3 shown, in this embodiment, a metal anti-rotation pin device with a nylon protective sleeve is disclosed, which includes a stationary ring 2 and a stationary ring seat 1. The stationary ring seat 1 is sleeved on the outside of the stationary ring 2. A through hole 6 is provided on the stationary ring seat 1, and an anti-rotation pin groove 7 is provided on the stationary ring 2. The opening position of the anti-rotation pin groove 7 corresponds to the through hole 6. An anti-rotation device 4 is provided in the through hole 6. The anti-rotation device 4 is detachably connected to the through hole 6. The lower part of the anti-rotation device 4 is arranged in the anti-rotation pin groove 7, and a nylon protective sleeve 5 is sleeved on the outside of the anti-rotation device 4 in the anti-rotation pin groove 7. In this embodiment, the anti-rotation device 4 is a metal anti-rotation pin.
[0019] In this embodiment, a stationary seal ring O-ring 3 is provided between the contact surfaces of the stationary seal ring 2 and the stationary seal ring seat 1. Specifically, a stationary seal ring boss 2-1 is provided on the outer sidewall of the stationary seal ring 2. The stationary seal ring boss 2-1 is of an annular boss structure. A stationary seal ring seat boss 1-1 is provided on the inner sidewall of the stationary seal ring seat 1. The stationary seal ring seat boss 1-1 is of an annular boss structure. The stationary seal ring boss 2-1 and the stationary seal ring seat boss 1-1 enclose a docking cavity 8, and the stationary seal ring O-ring 3 is arranged in the docking cavity 8.
[0020] In this embodiment, the anti-rotation pin groove 7 is a notch provided at one end of the outer wall of the stationary seal ring 2 away from the stationary seal ring boss 2-1.
[0021] The assembly process of the present utility model is as follows:
[0022] First, the anti-rotation device 4 is placed into the through hole 6 of the stationary seal ring seat 1 and part of it protrudes. The nylon protective sleeve 5 is sleeved on the protruding part of the anti-rotation device 4. The stationary seal ring O-ring 3 is placed in the inner concave surface of the stationary seal ring seat boss 1-1 of the stationary seal ring seat 1. Then, the notch of the anti-rotation pin groove 7 of the stationary seal ring 2 is aligned with the nylon protective sleeve 5 and inserted. Then, the entire stationary seal ring 2 is inserted into the stationary seal ring seat 1 so that the stationary seal ring O-ring 3 seals the two. The above components form the stationary seal ring assembly. When the pump starts or stops, or when the pump runs with large vibrations and generates centrifugal impact force, the nylon protective sleeve 5 will play a role in absorption and buffering, avoiding direct collision between the anti-rotation device 4 and the anti-rotation pin groove 7, resulting in cracking or even overall fragmentation of the stationary seal ring 2.
[0023] The embodiments described above are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.
Claims
1. A metal anti-rotation pin device with a nylon protective sleeve, comprising a static ring (2) and a static ring seat (1), characterized in that: The stationary ring seat (1) is sleeved outside the stationary ring (2). A through hole (6) is provided on the stationary ring seat (1). An anti-rotation pin groove (7) is provided on the stationary ring (2). The opening position of the anti-rotation pin groove (7) corresponds to the through hole (6). An anti-rotation device (4) is provided in the through hole (6). The lower part of the anti-rotation device (4) is arranged in the anti-rotation pin groove (7). A nylon protective sleeve (5) is sleeved outside the anti-rotation device (4) in the anti-rotation pin groove (7).
2. The metal anti-rotation pin device with a nylon protective sleeve according to claim 1, characterized in that: A stationary ring O-ring (3) is provided between the contact surfaces of the stationary ring (2) and the stationary ring seat (1).
3. The metal anti-rotation pin device with a nylon protective sleeve according to claim 2, characterized in that: A stationary ring boss (2-1) is provided on the outer side wall of the stationary ring (2). A stationary ring seat boss (1-1) is provided on the inner side wall of the stationary ring seat (1). The stationary ring boss (2-1) and the stationary ring seat boss (1-1) enclose a docking cavity (8). The stationary ring O-ring (3) is arranged in the docking cavity (8).
4. The metal anti-rotation pin device with a nylon protective sleeve according to claim 3, characterized in that: The stationary ring seat boss (1-1) is an annular boss, and the stationary ring boss (2-1) is an annular boss.
5. The metal anti-rotation pin device with a nylon protective sleeve according to claim 1, characterized in that: The anti-rotation device (4) is a metal anti-rotation pin.