CN205841768U - A kind of dry gas sealing structure being applicable to vibration detection - Google Patents

Abstract

The utility model discloses a kind of dry gas sealing structure being applicable to vibration detection, including axle sleeve, rotating ring, stationary ring, throw-out collar and spring base, circular groove is all had on described stationary ring and throw-out collar, for firm placement vibration acceleration sensor, symmetrical through hole is had, in order to guiding sensor holding wire on described throw-out collar and spring base.This structure do not affect dry gas seals properly functioning on the basis of, the problem efficiently solving the detection of dry gas seals Workpiece vibration under operating mode.Feature of the present utility model is simple in construction, it is simple to processing, is not affecting in dry gas seals under conditions of axial motion workpiece nominal situation runs, it is achieved the measurement of its Vibration Condition.

Description

A Dry Gas Seal Structure Suitable for Vibration Detection

technical field

The utility model belongs to the technical field of dry gas sealing, in particular to a dry gas sealing structure suitable for vibration detection.

Background technique

Dry gas seal is a kind of non-contact mechanical seal, which is widely used in industrial production devices such as centrifugal pumps, mixers and compressors. When working, a micron-sized gas film will be formed between the end faces of the moving ring and the static ring. Small changes in thickness can cause dry gas seal failure.

Affected by external conditions, dry gas seal axially moving workpieces will produce certain periodic axial vibrations under working conditions, thereby changing the thickness of the gas film. However, the distance between the dry gas seal workpieces of ordinary design is too tight, and the sensor is difficult to fix firmly , and the signal line is easily involved by the rotating shaft, which makes it difficult to measure the vibration of the dry gas seal under working conditions.

Utility model content

The purpose of the utility model is to provide a dry gas seal structure suitable for vibration detection without affecting the normal operation of the dry gas seal axially serially moving workpieces in view of the above existing problems.

The technical scheme of the utility model is achieved in the following way: a dry gas seal structure suitable for vibration detection, characterized in that it includes a shaft sleeve, a moving ring, a static ring, a push ring and a spring seat, and the shaft sleeve and the moving ring C-shaped sealing rings are attached between the static ring and the push ring, and between the push ring and the spring seat, and the same spring is installed between the push ring and the spring seat.

In the dry gas seal structure suitable for vibration detection described in the utility model, the static ring and the push ring have symmetrical circular grooves on the axial outer side, which are used for fixing the vibration acceleration sensor. The push ring and the push ring There is a symmetrical through hole on the spring seat, which is used to lead out the sensor signal line from the inside to the outside. The axial vibration signals of the static ring and the push ring are measured by the acceleration sensor and transmitted to the signal collection processor through the signal line.

In the dry gas seal structure suitable for vibration detection described in the utility model, the axial circular grooves of the static ring and the push ring are used for fixing the acceleration sensor, in order to prevent the acceleration sensors of the static ring and the push ring from measuring each other. Touch, static ring and push ring should pay attention to the staggered groove position when installing, the groove depth should be close to half of the height of the acceleration sensor, the groove area should be larger than the end surface area of the acceleration sensor, the through hole on the push ring and the spring seat It is used to lead out the signal line, the signal line is externally connected to the signal collection processor, and the through holes on the push ring and the spring seat should correspond to the groove positions of the static ring and the push ring respectively.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the front and back structures of the static ring.

Fig. 3 is a structural schematic diagram of the front and back of the push ring.

Fig. 4 is a schematic diagram of the structure of the spring seat.

Figure 5 is a schematic diagram of the installation of the static ring, push ring and spring seat.

Marks in the figure: 1 is the shaft sleeve, 2 is the moving ring, 3 is the static ring, 4 is the C-shaped sealing ring, 5 is the push ring, 6 is the spring, 7 is the spring seat, 8 is the groove, 9 is the through hole, 10 For the bolt groove, 11 is the spring groove.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings. In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that The specific embodiments described are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a dry gas seal structure suitable for vibration detection is characterized in that: it includes a shaft sleeve, a moving ring, a static ring, a push ring and a spring seat, between the shaft sleeve and the moving ring, the A C-shaped sealing ring is attached between the static ring and the push ring and between the push ring and the spring seat, and 12 identical springs are installed between the push ring and the spring seat.

Wherein, the shaft sleeve rotates together with the rotating shaft, and the moving ring is nested into the shaft sleeve and rotates accordingly. The moving ring is processed with a spiral groove, and when the moving ring rotates, the spiral groove pumps gas into the groove to form an air film. The push ring and the static ring are nested into the spring seat in turn, the spring seat is fixed on the external support by 10 bolts, and 12 identical springs are respectively placed in the spring grooves of the spring seat. When the air film is formed, the static The ring is pushed, and the spring is always in a compressed state, so that the push ring moves coaxially with the static ring. The vibration signals of the static ring and the push ring are measured by the acceleration sensor fixed inside the groove. The incoming signal line, the signal line passes through a certain A length of through hole leads out to the sealed interior.

As shown in Fig. 2, Fig. 3 and Fig. 4, the step surface of the inner ring on the opposite side of the static ring is larger, which is used for processing circular grooves, and the tail of the push ring is processed flat and the same as that on the static ring is processed at this position. A circular groove, the groove is used for fixing the vibration acceleration sensor, symmetrical through holes are provided on the push ring for deriving the signal line of the sensor on the static ring, and symmetrical through holes are also processed in the axial direction of the spring seat. Holes, the inward extension length of the through hole can not be close to the limit position where the push ring moves to the right, and a part is extended outward.

Wherein, the grooves of the static ring and the push ring are used to place the acceleration sensor. In order to ensure that it is stable and does not fall, part of the fixing glue must be filled around the acceleration sensor placed in the groove. The area of the groove should be larger than The area of the end surface of the acceleration used is about 50%, and the depth is half of the height of the acceleration sensor. The solid glue is filled in the part between the sensor and the groove. Try to avoid filling on the end surface of the sensor. The thickness of the fixing glue is uniform and does not exceed the edge of the groove.

As shown in Figure 5, in order to prevent the acceleration sensors measuring the static ring and the push ring from touching each other, attention should be paid to staggering the positions of the grooves when the static ring and the push ring are installed. The through hole on the ring and the spring seat is used to transmit the signal line of the vibration signal of the static ring and the push ring. When installing the push ring, the through hole of the push ring should not only correspond to the groove position of the static ring, but also make it Corresponding to the through hole on the spring seat, in addition to ensure that the groove of the push ring corresponds to the other pair of through holes on the spring seat, the reserved length of the signal line inside the dry gas seal should not be too long to avoid Tangled with the shaft.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (2)

1. A dry gas seal structure suitable for vibration detection, characterized in that it includes a shaft sleeve (1), a moving ring (2), a static ring (3), a push ring (5) and a spring seat (7). There are seals between the shaft sleeve (1) and the moving ring (2), between the static ring (3) and the push ring (5), and between the push ring (5) and the spring seat (7). ring (4), and a spring (6) is installed between the push ring (5) and the spring seat (7). 2. The dry gas seal structure according to claim 1, characterized in that: both the static ring (3) and the push ring (5) have circular grooves (8) for stably placing vibration acceleration sensors, There are symmetrical through holes (9) on the push ring (5) and the spring seat (7) to guide the sensor signal line, the axial vibration of the static ring (3) and the push ring (5) is measured by the acceleration sensor, through The signal line goes to the signal collection processor.