Brittle fracture resistant graphite ring for mechanical seal

Abstract

The utility model discloses a brittle fracture resistant graphite ring for mechanical sealing, which relates to the technical field of mechanical sealing, and comprises a plurality of graphite arc-shaped plates and a metal ring, the plurality of graphite arc-shaped plates are distributed on the outer side of the metal ring in an annular array, and the middle part of one side, close to the metal ring, of each of the plurality of graphite arc-shaped plates is provided with a first groove; a limiting block is clamped in the first groove, one side of the limiting block is fixedly connected with the metal ring, a cavity is formed in the limiting block, check blocks are slidably arranged on the two sides of the interior of the cavity, clamping blocks are fixedly arranged on the sides, away from each other, of the two check blocks, one ends of the two clamping blocks extend to the outer side of the cavity, and the other ends of the two clamping blocks extend to the outer side of the cavity. Clamping grooves are formed in the inner walls of the two sides of the first groove, and the two clamping blocks are connected with the corresponding clamping grooves in a clamped mode. According to the utility model, the damaged part can be independently replaced, and the waste of materials can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely relates to a brittle fracture -resistant graphite ring for mechanical seal. BACKGROUND

[0002] Graphite is the most widely used friction pair material in the mechanical seal industry, has good self-lubricating performance, low friction coefficient, excellent corrosion resistance, excellent thermal conductivity, low linear expansion coefficient, excellent performance and temperature resistance and easy processing and other characteristics, therefore, its application range is extremely wide.

[0003] Among them, the announcement number CN203098866U discloses a brittle fracture -resistant graphite static ring for big diameter mechanical seal, graphite static ring join the iron nickel alloy metal ring, this technical scheme still has the defect:

[0004] The graphite static ring in the technical scheme is a whole, therefore, when the graphite static ring is damaged in part position, the whole graphite static ring needs to be discarded and replaced, causes the waste of material. UTILITY MODEL CONTENT

[0005] In view of the above existing brittle fracture -resistant graphite ring for mechanical seal problem, the utility model is provided.

[0006] Therefore, the utility model aims at providing a brittle fracture -resistant graphite ring for mechanical seal, solves the problem that the graphite static ring in the brittle fracture -resistant graphite ring for mechanical seal in the prior art is a whole, therefore, when the graphite static ring is damaged in part position, the whole graphite static ring needs to be discarded and replaced, causes the waste of material.

[0007] In order to realize the above purpose, the utility model provides the following technical scheme:

[0008] A brittle fracture -resistant graphite ring for mechanical seal, including graphite arc plate and metal ring, a plurality of graphite arc plate is annular array distribution and is set up in the outside of metal ring, a plurality of graphite arc plate is close to the side middle part of metal ring and is uniformly provided with first recess, the inside of first recess is connected with the limit block of joint, the side of limit block is fixedly connected with metal ring, the inside of limit block is provided with cavity, the inside of cavity is slidably provided with the baffle of two, the side of two baffle is fixedly provided with the clamping block of two, the one end of two clamping block is extended to the outside of cavity, the two sides inner wall of first recess is provided with the clamping groove of two, two clamping block is connected with the clamping groove of corresponding, the inside of cavity is provided with the transmission mechanism of driving two baffle movement.

[0009] Preferably, the transmission mechanism comprises a movable ring and push rods, a threaded rod is arranged inside the cavity and rotates, the movable ring is threadedly sleeved on the rod wall of the threaded rod, two push rods are arranged on the two sides of the movable ring, and the two ends of each push rod are rotatably connected with a connecting block through an axle pin.

[0010] Preferably, the graphite arc-shaped plate is provided with an inclined surface on the front side of one end and the rear side of the other end.

[0011] Preferably, the inner wall of the metal ring and the positions corresponding to the plurality of limiting blocks are provided with second grooves, and one end of each threaded rod extends into the second groove and is fixedly sleeved with a rotating wheel.

[0012] Preferably, the longitudinal section of the cavity is rectangular.

[0013] Preferably, the limiting block and the first groove are both rectangular in cross section.

[0014] In the above technical solution, the technical effects and advantages of the present application are provided.

[0015] The present application rotates the threaded rod to drive the movable ring to move, and the movable ring drives the two push rods to rotate vertically, so that the two stop blocks move towards each other, and the two clamping blocks move away from the corresponding clamping grooves, thereby releasing the limiting between the limiting block and the first groove, separating the graphite arc-shaped plate and the metal ring, and replacing the damaged part alone, thereby saving materials. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments or prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0017] Figure 1 A structure diagram of a graphite ring for brittle fracture-resistant mechanical seal is provided.

[0018] Figure 2 A structure diagram of a graphite ring for brittle fracture-resistant mechanical seal is provided. Figure 1 A structure diagram of a graphite ring for brittle fracture-resistant mechanical seal is provided.

[0019] Figure 3 A structure diagram of a graphite ring for brittle fracture-resistant mechanical seal is provided. Figure 2 A structure diagram of a graphite ring for brittle fracture-resistant mechanical seal is provided.

[0020] Explanation of reference signs:

[0021] 1, metal ring; 2, graphite arc plate; 3, limit block; 4, stop block; 5, clamping block; 6, threaded rod; 7, movable ring; 8, push rod; 9, connecting block; 10, shaft pin; 11, runner. DETAILED DESCRIPTION

[0022] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0023] The utility model discloses a graphite ring for brittle fracture resistant mechanical seal.

[0024] Embodiment one

[0025] Referring to Figures 1-3 A graphite ring for brittle fracture resistant mechanical seal, including graphite arc plate 2 and metal ring 1, multiple graphite arc plate 2 are arranged in annular array distribution on the outside of metal ring 1, and the front side of one end of graphite arc plate 2 and the rear side of the other end are all provided with bevel, improve the sealing property between multiple graphite arc plate 2, the middle part of the side of multiple graphite arc plate 2 close to metal ring 1 is all provided with first recess, the inside of first recess is clamped with limit block 3, the cross section of limit block 3 and first recess is all rectangular, so that limit block 3 cannot rotate, that is, can stably slide, one side of limit block 3 is fixedly connected with metal ring 1, the inside of limit block 3 is provided with cavity, the inside of cavity is slidably provided with stop block 4 on both sides, the side of two stop blocks 4 away from each other is all fixedly provided with clamping block 5, one end of two clamping blocks 5 all extends to the outside of cavity, the inner wall of both sides of first recess is all provided with clamping groove, two clamping blocks 5 are all clamped with corresponding clamping groove, the longitudinal section of stop block 4 and cavity is all rectangular, so that stop block 4 cannot rotate, that is, can stably slide.

[0026] Embodiment two

[0027] Referring to Figures 1-3 The inside of cavity is provided with transmission mechanism that moves two stop blocks 4, and the transmission mechanism includes movable ring 7 and push rod 8, the inside of cavity is rotatably provided with threaded rod 6, movable ring 7 is threadedly sleeved on the wall of threaded rod 6, two push rods 8 are arranged on the two sides of movable ring 7, and the two ends of push rod 8 are rotatably connected with connecting block 9 through shaft pin 10, and multiple connecting blocks 9 are respectively fixedly connected with corresponding movable ring 7 and stop block 4.

[0028] Embodiment three

[0029] Referring to Figures 1-3 The inner wall of metal ring 1 and the position corresponding to multiple limit blocks 3 are all provided with second recess, and one end of multiple threaded rods 6 extends to the inside of second recess and is fixedly sleeved with runner 11, so that threaded rod 6 can be conveniently rotated.

[0030] The utility model discloses in using, rotates threaded rod 6, makes threaded rod 6 drive movable ring 7 to remove, movable ring 7 drive two push rod 8 rotation trend vertical, even make two blocking block 4 move towards, further make two clamping block 5 from corresponding clamping groove apart, namely cancel the spacing between limiting block 3 and first recess, namely can separate graphite arc plate 2 with metal ring 1, namely can carry out individual replacement to damaged part, can save material.

[0031] The above only describes certain exemplary embodiments of the utility model through the way of illustration, without doubt, for ordinary skilled person in the art, under the condition of not deviating from the spirit and scope of the utility model, can modify the described embodiment with various different ways. Therefore, the above drawing and description are illustrative in nature, and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A graphite ring for mechanical sealing that is resistant to brittle cracking, comprising a graphite arc plate (2) and a metal ring (1), characterized in that: The plurality of graphite arc plates (2) are distributed in an annular array and arranged on the outside of the metal ring (1); a first groove is provided in the middle of one side of the plurality of graphite arc plates (2) close to the metal ring (1); a limit block (3) is clamped inside the first groove; one side of the limit block (3) is fixedly connected to the metal ring (1); a cavity is provided inside the limit block (3); both sides of the cavity are slidably provided with stop blocks (4); a clamping block (5) is fixedly provided on the opposite sides of the two stop blocks (4); one end of the two clamping blocks (5) extends to the outside of the cavity; both sides of the inner wall of the first groove are provided with clamping grooves; the two clamping blocks (5) are clamped with the corresponding clamping grooves; a transmission mechanism for driving the two stop blocks (4) to move is provided inside the cavity.

2. The brittle crack-resistant graphite ring for mechanical seal according to claim 1, characterized in that: The transmission mechanism includes a movable ring (7) and a push rod (8), a threaded rod (6) is rotatably provided inside the cavity, the movable ring (7) is threadedly sleeved on the rod wall of the threaded rod (6), two push rods (8) are provided on both sides of the movable ring (7), both ends of the push rod (8) are rotatably connected to a connecting block (9) through an axle pin (10), and a plurality of the connecting blocks (9) are respectively fixedly connected to the corresponding movable ring (7) and the stop block (4).

3. The brittle crack-resistant graphite ring for mechanical seal according to claim 1, characterized in that: The front side of one end and the rear side of the other end of the graphite arc-shaped plate (2) are both provided with inclined surfaces.

4. The brittle crack-resistant graphite ring for mechanical seal according to claim 2, characterized in that: A second groove is provided on the inner wall of the metal ring (1) and at positions corresponding to the plurality of limit blocks (3); one end of each of the plurality of threaded rods (6) extends into the interior of the second groove and is fixedly sleeved with a rotating wheel (11).

5. The brittle crack resistant graphite ring for mechanical seal according to claim 1, characterized in that: The longitudinal sections of the stopper (4) and the cavity are both rectangular.

6. The brittle crack resistant graphite ring for mechanical seal according to claim 1, characterized in that: The cross sections of the limiting block (3) and the first groove are both rectangular.

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