A mechanical seal with a wear detection device

Abstract

A mechanical seal with a wear detection device, comprising a graphite ring and a stationary ring. The graphite ring is installed on a graphite ring seat, and the stationary ring is installed on a stationary ring seat. A spring is also installed on the stationary ring seat, and the stationary ring is in close contact with the graphite ring. The pump shaft is connected to a sleeve drive key, and torque is transmitted to the sleeve through the sleeve drive key. The sleeve is connected to a graphite ring seat drive key, and the sleeve transmits torque to the graphite ring seat through the graphite ring seat drive key. The graphite ring seat is connected to the graphite ring, and the graphite ring seat transmits torque to the graphite ring. Through the pre-tightening effect of the spring and the sealing housing, the stationary ring is in close contact with the graphite ring.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power rotating equipment management, and particularly relates to a mechanical seal with a wear detection device. Background Art

[0002] The utilization rate of mechanical seals in pump equipment has exceeded 90%. The detection methods for mechanical seals are often only the temperature of the seal chamber, the pressure difference of the cooling water filter, the temperature and pressure of the cooling water, etc. These parameters can only indirectly reflect the state of the mechanical seal. The graphite ring component in the mechanical seal friction pair is prone to wear, resulting in the failure of the entire seal. This device installs a detection device on the graphite ring component to realize the real-time detection of the wear condition of the graphite ring. Summary of the Invention

[0003] The purpose of the present invention is to provide a mechanical seal with a wear detection device for the real-time detection of the wear condition of the graphite ring of the mechanical seal.

[0004] The technical solution of the present invention is as follows: A mechanical seal with a wear detection device includes a graphite ring and a stationary ring. The graphite ring is installed on a graphite ring seat, and the stationary ring is installed on a stationary ring seat. A spring is also installed on the stationary ring seat, and the stationary ring is in close contact with the graphite ring.

[0005] The pump shaft is connected to a sleeve transmission key, and torque is transmitted to the sleeve through the sleeve transmission key. The sleeve is connected to a graphite ring seat transmission key, and the sleeve transmits torque to the graphite ring seat through the graphite ring seat transmission key. The graphite ring seat is connected to the graphite ring, and the graphite ring seat transmits torque to the graphite ring.

[0006] Through the preloading action of the spring and the seal housing, the stationary ring is in close contact with the graphite ring.

[0007] The graphite ring rotates, and the stationary stationary ring maintains a proper contact state with the graphite ring under the action of the spring according to the operating state of the graphite ring.

[0008] It further includes a detection probe. The detection probe is connected to a probe power supply and a preamplifier. The preamplifier is connected to a cabinet, and the cabinet is connected to a display screen.

[0009] It further includes a detection probe. The detection probe is connected to a probe power supply and a preamplifier through a cable. The preamplifier is connected to a cabinet through a cable, and the cabinet is connected to a display screen through a cable.

[0010] The signal is transmitted to the cabinet through the preamplifier, and the cabinet displays the distance information between the detection probe and the stationary ring seat on the display screen through calculation.

[0011] The remarkable effects of the present invention are as follows: it can online detect the wear amount of the graphite ring of the mechanical seal, and in real time detect the operation state of the mechanical seal, laying a good foundation for the power plant to predict the equipment state and optimize the preventive maintenance outline. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of a mechanical seal with a wear detection device;

[0013] In the figure: 1 pump shaft, 2 sleeve, 3 sleeve transmission key, 4 graphite ring seat transmission key, 5 graphite ring seat, 6 graphite ring, 7 stationary ring, 8 stationary ring seat, 9 seal housing, 10 spring, 11 detection probe, 12 probe power supply, 13 preamplifier, 14 cabinet, 15 display screen. Detailed Embodiments

[0014] The following elaborates on the preferred embodiments of the present invention in conjunction with the drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0015] A mechanical seal with a wear detection device includes a graphite ring 6, a stationary ring 7, a detection probe 10, a preamplifier 11, a cabinet 12, and a display 13.

[0016] The graphite ring 6 is installed on the graphite ring seat 5, and the stationary ring 7 is installed on the stationary ring seat 8. Through the preloading action of the spring 10 on the stationary ring seat 8 and the seal housing 9, in the static state, the stationary ring 7 is closely attached to the graphite ring 6.

[0017] When the pump shaft 1 rotates, the torque is transmitted to the sleeve 2 through the sleeve transmission key 3, the sleeve 2 transmits the torque to the graphite ring seat 5 through the graphite ring seat transmission key 4, the graphite ring seat 5 transmits the torque to the graphite ring 6, and the graphite ring 6 rotates. The stationary stationary ring 7 maintains a proper fitting state with the graphite ring 6 under the action of the spring 10 according to the operation state of the graphite ring 6.

[0018] When the graphite ring 6 wears and its thickness decreases, the stationary ring 7 installed on the stationary ring seat 8 will move towards the graphite ring 6 under the action of the spring 10, the distance between the detection probe 11 and the stationary ring seat 8 increases, and the signal is transmitted to the cabinet 14 through the preamplifier 13. The cabinet 14 displays the distance information between the detection probe 11 and the stationary ring seat 8 on the display screen 15 through calculation.

Claims

1. A mechanical seal with a wear detection device, characterized in that: It includes a graphite ring (6) and a stationary ring (7). The graphite ring (6) is installed on a graphite ring seat (5), and the stationary ring (7) is installed on a stationary ring seat (8). A spring (10) is also installed on the stationary ring seat (8), and the stationary ring (7) is in close contact with the graphite ring (6). The pump shaft (1) is connected to a sleeve drive key (3), and torque is transmitted to the sleeve (2) through the sleeve drive key (3). The sleeve (2) is connected to a graphite ring seat drive key (4), and the sleeve (2) transmits torque to the graphite ring seat (5) through the graphite ring seat drive key (4). The graphite ring seat (5) is connected to the graphite ring (6), and the graphite ring seat (5) transmits torque to the graphite ring (6). Through the pre-tightening action of the spring (10) and the sealing housing (9), the stationary ring (7) is in close contact with the graphite ring (6). It also includes a detection probe (11). The detection probe (11) is connected to a probe power supply (12) and a preamplifier (13). The preamplifier (13) is connected to a cabinet (14), and the cabinet (14) is connected to a display screen (15).

2. The mechanical seal with a wear detection device according to claim 1, wherein: The graphite ring (6) rotates, and the stationary stationary ring (7) maintains a proper contact state with the graphite ring (6) under the action of the spring (10) according to the operating state of the graphite ring (6).

3. The mechanical seal with a wear detection device according to claim 1, characterized in that: It also includes a detection probe (11). The detection probe (11) is connected to a probe power supply (12) and a preamplifier (13) through a cable. The preamplifier (13) is connected to a cabinet (14) through a cable, and the cabinet (14) is connected to a display screen (15) through a cable.

4. A mechanical seal with a wear detection device according to claim 1, characterized in that: The signal is transmitted to the cabinet (14) through the preamplifier (13), and the cabinet (14) displays the distance information between the detection probe (11) and the stationary ring seat (8) on the display screen (15) through calculation.

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