Collision-resistant mechanical seal for water pump

Abstract

The utility model discloses a collision-resistant mechanical seal for a water pump, which belongs to the technical field of mechanical seals, comprises a static ring and a moving ring, and is characterized in that a driven device is arranged on one side, far away from the static ring, of the moving ring, a driving device is arranged on one side, far away from the static ring, of the driven device, a spring is arranged between the driven device and the driving device, and the spring is connected with the moving ring. The spring is in a compressed state, a driven shifting plate is arranged on the edge of the driven device, a driving shifting plate is arranged on the edge of the driving device, the driven shifting plate and the driving shifting plate are arranged alternately, a collision folded plate is arranged at one end of the driven shifting plate, and the collision folded plate and the driven shifting plate are of an integrated structure. According to the mechanical seal, the strength of the mechanical seal is effectively enhanced, and the damage probability is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically an impact-resistant mechanical seal for water pumps. Background Technology

[0002] Water pumps are commonly used equipment in industrial and agricultural activities. During operation, the shaft drives the impeller to rotate, and water is guided from the inlet pipe to the outlet pipe through the internal and external pressure difference until the entire transportation work is completed. To prevent water from entering the electrical parts of the water pump, a mechanical seal must be installed between the shaft and the pump at a specific location. The mechanical seal achieves the desired sealing effect through the dynamic contact and relative rotation of the rotating ring and the stationary ring. The dynamic contact between the rotating ring and the stationary ring is achieved by a spring kept in a compressed state. Each end of the spring has a sheet metal structure, which is connected to the shaft and the rotating ring respectively. The sheet metal at the shaft end moves the sheet metal at the rotating ring end to achieve transmission. After the operation is completed and the shaft stops rotating, the sheet metal at the shaft end stops first. The sheet metal at the rotating ring end will continue to rotate a short distance due to inertia before stopping. This short distance will cause the sheet metal at the rotating ring end to collide with the sheet metal at the shaft end, which significantly increases the probability of mechanical seal damage. Although this is necessary by design, this short distance cannot be avoided. Given this situation, how to enhance the strength of the mechanical seal and reduce the probability of damage has become an urgent problem for relevant technical personnel to solve. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides an impact-resistant mechanical seal for water pumps.

[0004] An impact-resistant mechanical seal for a water pump includes a stationary ring and a rotating ring, characterized in that: a driven element is disposed on the side of the rotating ring away from the stationary ring, an actuator is disposed on the side of the driven element away from the stationary ring, a spring is disposed between the driven element and the actuator, the spring is in a compressed state, a driven deflector is disposed on the edge of the driven element, an actuator deflector is disposed on the edge of the actuator, the driven deflector and the actuator deflector are disposed alternately, a collision baffle is disposed at one end of the driven deflector, the collision baffle and the driven deflector are integrally formed, and a connecting hole is disposed through the center of the actuator.

[0005] Furthermore, a first limiting groove is provided on one side of the slave, the moving ring is located inside the first limiting groove, both the moving ring and the first limiting groove are hexagonal, a second limiting groove is provided on the other side of the slave, and one end of the spring is located inside the second limiting groove.

[0006] Furthermore, a limiting protrusion is provided at one end of the active dial plate, and the driven dial plate is located inside the limiting protrusion.

[0007] Furthermore, there are three active and three passive dials, and both active and passive dials are arranged in a circular array.

[0008] Furthermore, an inner sealing ring is provided inside the rotating ring, and an outer sealing ring is provided on the side of the stationary ring away from the rotating ring.

[0009] The beneficial effects of this impact-resistant mechanical seal for water pumps are as follows:

[0010] The driven plate is located inside the limiting protrusion, and one end of the spring is located inside the second limiting groove. Combined with the spring being in a compressed state, this effectively ensures the stability of the dynamic fit between the moving ring and the stationary ring. The annular array and alternating arrangement of the driving plate and the driven plate effectively ensure the stability of the transmission, thereby effectively ensuring the sealing effect of this mechanical seal. On this basis, even if the driven unit continues to rotate a short distance due to inertia after the shaft stops rotating, and this causes the driven unit to collide with the driving unit, the collision baffle can stably withstand the collision, thereby effectively enhancing the strength of this mechanical seal and effectively reducing the probability of damage. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model (I);

[0014] Figure 3 This is a schematic diagram of the exploded structure of this utility model (II).

[0015] Among them, 1-actuator, 2-driven device, 3-stationary ring, 4-outer sealing ring, 5-moving ring, 6-inner sealing ring, 7-driven lever plate, 8-spring, 9-actuator lever plate, 10-first limiting groove, 11-connecting hole, 12-second limiting groove, 13-collision folding plate, 14-limiting protrusion plate. Detailed Implementation

[0016] To make the description clearer, the impact-resistant mechanical seal for water pumps according to this utility model will be further described in conjunction with the accompanying drawings.

[0017] A collision-resistant mechanical seal for a water pump includes a stationary ring 3 and a rotating ring 5. The seal is characterized by: a driven element 2 disposed on the side of the rotating ring 5 away from the stationary ring 3; an actuator 1 disposed on the side of the driven element 2 away from the stationary ring 3; a spring 8 disposed between the driven element 2 and the actuator 1, the spring 8 being in a compressed state; a driven deflector 7 disposed at the edge of the driven element 2; an actuator deflector 9 disposed at the edge of the actuator 1; the driven deflector 7 and the actuator deflector 9 being disposed alternately; a collision baffle 13 disposed at one end of the driven deflector 7; the collision baffle 13 and the driven deflector 7 being an integral structure; and a connecting hole 11 penetrating the center of the actuator 1.

[0018] Furthermore, a first limiting groove 10 is provided on one side of the slave 2, and the moving ring 5 is located inside the first limiting groove 10. Both the moving ring 5 and the first limiting groove 10 are hexagonal. A second limiting groove 12 is provided on the other side of the slave 2, and one end of the spring 8 is located inside the second limiting groove 12.

[0019] Furthermore, a limiting protrusion 14 is provided at one end of the active dial plate 9, and the driven dial plate 7 is located inside the limiting protrusion 14.

[0020] Furthermore, there are three active dial plates 9 and three driven dial plates 7, and the active dial plates 9 and the driven dial plates 7 are arranged in a circular array.

[0021] Furthermore, an inner sealing ring 6 is provided inside the moving ring 5, and an outer sealing ring 4 is provided on the side of the stationary ring 3 away from the moving ring 5.

[0022] The working principle of this impact-resistant mechanical seal for a water pump is as follows: The actuator 1 corresponds to the sheet metal at the shaft end in the prior art, and the driven actuator 2 corresponds to the sheet metal at the rotating ring end in the prior art. The stationary ring 3 is fixedly installed in a designated position inside the water pump. The actuator 1 is fixedly installed in a designated position on the water pump shaft through the connecting hole 11. At this time, the water pump shaft passes through the actuator 1, spring 8, driven actuator 2, rotating ring 5, and stationary ring 3. The inner sealing ring 6 is in contact with the water pump shaft. The spring 8 is in a compressed state, causing the rotating ring 5 to contact the stationary ring 3. When the water pump is started, the shaft drives the actuator 1 to rotate. The active deflector 9 pushes the driven deflector 7, causing the driven actuator 2 and rotating ring 5 to move together with the actuator 1. As the rotating ring 5 and stationary ring 3 come into contact, they rotate relative to each other. This prevents water from leaking into the pump space where the stationary ring 3 is located at the contact point between the rotating ring 5 and the stationary ring 3. The inner sealing ring 6 prevents water from seeping into the pump space where the stationary ring 3 is located along the surface of the rotating shaft. This avoids posing a safety threat to the electrical components in the pump space where the stationary ring 3 is located. When the pump is shut off after the operation is completed, the actuator 1 stops rotating with the rotating shaft. The driven actuator 2 continues to rotate a short distance due to inertia before stopping, and thus collides with the actuator 1. Specifically, the collision baffle 13 collides with the active baffle 9. The collision baffle 13 stably withstands the collision, which significantly enhances the strength of the mechanical seal and significantly reduces the probability of damage.

[0023] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An impact-resistant mechanical seal for a water pump, comprising a stationary ring and a rotating ring, characterized in that: A driven device is disposed on the side of the moving ring away from the stationary ring, and an active device is disposed on the side of the driven device away from the stationary ring. A spring is disposed between the driven device and the active device, and the spring is in a compressed state. A driven plate is disposed on the edge of the driven device, and an active plate is disposed on the edge of the active device. The driven plate and the active plate are disposed alternately. A collision baffle is disposed at one end of the driven plate. The collision baffle and the driven plate are integrally formed. A connecting hole is disposed through the center of the active device.

2. The impact-resistant mechanical seal for a water pump according to claim 1, characterized in that, A first limiting groove is provided on one side of the slave, and the moving ring is located inside the first limiting groove. Both the moving ring and the first limiting groove are hexagonal. A second limiting groove is provided on the other side of the slave, and one end of the spring is located inside the second limiting groove.

3. The impact-resistant mechanical seal for a water pump according to claim 1, characterized in that, The active dial plate is provided with a limiting protrusion at one end, and the driven dial plate is located inside the limiting protrusion.

4. The impact-resistant mechanical seal for a water pump according to claim 1, characterized in that, The number of active and passive dial plates is three, and the active and passive dial plates are arranged in a circular array.

5. The impact-resistant mechanical seal for a water pump according to claim 1, characterized in that, An inner sealing ring is provided inside the rotating ring, and an outer sealing ring is provided on the side of the stationary ring away from the rotating ring.

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