CN211315108U - Spring rotation type shaft sealing device for water jet propulsion unit - Google Patents

Abstract

The utility model discloses a spring rotation type shaft seal device for water jet propulsion unit, include: a shaft, a gland, a pressure plate, a static ring, a movable ring seat, a movable ring, a spring seat, a spring, a corrugated pipe, a supporting ring and a positioning ring, the static ring is arranged on the gland through a plurality of first pins and first pin sleeves, the pressure plate axially props against the static ring and is connected with the gland through a plurality of fixing pieces, the movable ring is arranged on the movable ring seat through a plurality of second pins and second pin sleeves, a plurality of spring guide pins are arranged on one side of the movable ring seat, a plurality of spring accommodating grooves are arranged on one side of the spring seat, the spring is sleeved on the spring guide pin and accommodated in the spring accommodating grooves, the movable ring seat is connected with the spring seat through a plurality of third pins and third pin sleeves, the movable ring seat is provided with pin holes matched with the third pins, the third pin can axially move in the pin hole, and the corrugated pipe is coated on one side of the movable ring seat and the spring seat, so that the service life of the shaft sealing device is prolonged.

Description

Spring rotation type shaft sealing device for water jet propulsion unit

[ technical field ] A method for producing a semiconductor device

The utility model relates to a mechanical seal field especially relates to a spring rotation type shaft seal device for water jet propulsion unit.

[ background of the invention ]

The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, water jet propulsion units, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world.

[ Utility model ] content

In order to solve the technical problem, an object of the utility model is to provide a can ensure spring rotary type shaft seal device for water jet propulsion unit of rotating ring compensation power.

The utility model discloses the technical scheme who adopts does: a spring rotary shaft seal for a water jet propulsion unit comprising: the movable ring seat is connected with the spring seat through a plurality of third pins and third pin sleeves, the movable ring seat can axially move relative to the spring seat, the corrugated pipe is coated on one side of the movable ring seat and the spring seat, the supporting ring is arranged between the corrugated pipe and the movable ring seat and the spring seat, and the positioning ring is arranged on one side of the corrugated pipe.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the movable ring seat is provided with an elliptical pin hole matched with the third pin.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: be equipped with first spring holder O type circle between spring holder and the axle, be equipped with second spring holder O type circle between spring holder and the rotating ring seat, be equipped with rotating ring seat O type circle between rotating ring seat and the rotating ring, be equipped with first quiet ring O type circle between quiet ring and the clamp plate, be equipped with the quiet ring O type circle of second between quiet ring and the gland, be equipped with clamp plate O type circle between clamp plate and the gland.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the bellows is made of viton.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the movable ring is made of pressureless sintered silicon carbide materials, and the static ring is made of reaction sintered silicon carbide materials.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the hardness of the dynamic ring is HRA95, and the hardness of the static ring is HRA 90.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the spring is made of nickel-chromium-molybdenum alloy containing tungsten.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the first pin sleeve, the second pin sleeve and the third pin sleeve are all made of flexible materials.

Preferably, the utility model provides a spring rotation type shaft seal device for water jet propulsion unit further sets up to: the spring seat is connected with the shaft through a clamping sleeve and a set screw.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a rotating ring adopts the first structure of many spring rotation compensation, and the design of many springs can satisfy the sealed even load that compresses tightly that bears of major axis footpath, and the cooperation uide pin makes sealed have great axial compensation ability, in addition the utility model provides a spring is along with the rotation of axes, the laminating that the ring face is better under the low-speed condition, in addition, when the deviation appears in the installation, the rotating ring can automatically regulated, can not cause sealed inefficacy and life-span influence because of the deviation of straightness that hangs down etc..

2. The movable ring and the stationary ring adopt cylindrical pins to transmit torque, and flexible pin sleeves are assembled on the cylindrical pins to play a role in buffering, so that the phenomenon that the sealing ring is cracked due to rigid contact between the pins and the holes when a host computer is just started to generate overlarge torque can be greatly avoided.

3. Can have the particulate matter to operating condition sea aquatic, consider that silt can pile up and arouse the spring to lose the bullet, consequently have the bellows in the outside cladding of spring holder and rotating ring seat to make the spring not contact with the medium, can effectively avoid the foreign particles to pile up the spring inefficacy that arouses.

4. The utility model provides an all adopt double-layered shell type transmission between spring holder and the axle, transmission stable in structure is reliable, also can avoid producing pit or fish tail etc. because of the screw is direct to contact with the axle.

[ description of the drawings ]

Fig. 1 is a schematic structural view of a spring rotary shaft sealing device for a middle water jet propulsion unit according to the present invention.

In fig. 1: 1. shaft, 2, gland, 20, gland pin hole, 3, pressure plate, 30, pressure plate O-ring, 4, stationary ring, 40, first pin, 41, stationary ring pin hole, 42, first pin bushing, 43, first stationary ring O-ring, 44, second stationary ring O-ring, 5, moving ring seat, 50, moving ring, 500, moving ring pin hole, 51, second pin, 52, first moving ring seat pin hole, 53, second pin bushing, 54, spring guide pin, 55, second moving ring seat pin hole, 56, moving ring seat O-ring, 6, spring seat, 60, spring, 61, spring receiving groove, 62, third pin, 63, spring seat pin hole, 64, third pin bushing, 65, first spring seat O-ring, 66, second spring seat O-ring, 7, bellows, 8, bracing ring, 9, retaining ring.

[ detailed description ] embodiments

The spring rotary shaft seal for a water jet propulsion system according to the invention is described in further detail below with reference to the specific embodiments.

Referring to fig. 1, a spring rotary shaft sealing device for a water jet propulsion device includes: shaft 1, gland 2, clamp plate 3, quiet ring 4, rotating ring seat 5, rotating ring 50, spring holder 6, a plurality of spring 60, bellows 7, support ring 8 and holding ring 9, in this embodiment, rotating ring 50 adopts the pressureless sintering carborundum material to make, the hardness of rotating ring 50 is HRA95, quiet ring 4 adopts the reaction sintering carborundum material to make, the hardness of quiet ring 4 is HRA90 to make two kinds of friction pairs have certain hardness difference, make sealed vice wearing properties of friction obtain promoting.

The spring seat 6 is fixedly connected with the shaft 1, in the embodiment, the spring seat 6 is connected with the shaft 1 through a jacket and a set screw, the transmission structure is stable and reliable, and pits or scratches and the like caused by direct contact of the screw and the shaft 1 can be avoided. The stationary ring 4 is installed on the gland 2 through two first pins 40, the stationary ring 4 is provided with stationary ring pin holes 41 matched with the first pins 40, the gland 2 is provided with gland pin holes 20 matched with the first pins 40, the first pins 40 are partially accommodated in the stationary ring pin holes 41 and partially accommodated in the gland pin holes 20, the first pins 40 are sleeved with first pin sleeves 42, the pressing plate 3 upwards props against the stationary ring 4 on the shaft 1 and is connected with the gland 2 through a plurality of fixing parts, the moving ring 50 is installed on the moving ring seat 5 through four second pins 51, the moving ring 50 is provided with moving ring pin holes 500 matched with the second pins 51, the moving ring seat 5 is provided with first moving ring seat pin holes 52 matched with the second pins 51, the second pins 51 are partially accommodated in the moving ring pin holes 500 and partially accommodated in the first moving ring seat pin holes 52, the second pins 51 are sleeved with second pin sleeves 53, one side of the moving ring seat 5 is provided with sixteen spring guide pins 54, one side of the spring seat 6 is provided with sixteen spring receiving grooves 61, in the present embodiment, the spring 60 is made of nickel-chromium-molybdenum alloy containing tungsten, the spring 60 is sleeved on the spring guide pins 54 and is received in the spring receiving grooves 61, one end of the spring 60 abuts against the moving ring seat 5, the other end of the spring 60 abuts against the spring seat 6, the moving ring seat 5 is connected with the spring seat 6 through four third pins 62, the moving ring seat 5 is provided with a second moving ring seat pin hole 55 matched with the third pins 62, the spring seat 6 is provided with a spring seat pin hole 63 matched with the third pins 62, the third pins 62 are partially received in the second moving ring seat pin hole 55 and partially received in the spring seat pin holes 63, the second moving ring seat pin hole 55 is in an elliptical shape, so that the moving ring seat 5 can move axially relative to the spring seat 6, the third pin 62 is sleeved with a third pin sleeve 64, and the bellows 7 is wrapped on one side of the movable ring seat 5 and the spring seat 6, so that the spring 60 is not contacted with a medium, and the failure of the spring 60 caused by accumulation of impurity particles can be effectively avoided. In the present embodiment, the bellows 7 is made of fluororubber, the support ring 8 is disposed between the bellows 7 and the movable ring seat 5 and the spring seat 6, and the positioning ring 9 is disposed on one side of the bellows 7. In the present embodiment, the first pin sleeve 42, the second pin sleeve 53 and the third pin sleeve 64 are made of flexible materials and play a role of buffering, so that the phenomenon that the sealing ring is broken due to hard contact between the pin and the hole caused by excessive torque generated when the main machine is started can be greatly avoided.

Be equipped with first spring holder O type ring 65 between spring holder 6 and the axle 1, be equipped with second spring holder O type ring 66 between spring holder 6 and the rotating ring seat 5, be equipped with rotating ring seat O type ring 56 between rotating ring seat 5 and the rotating ring 50, be equipped with first quiet ring O type ring 43 between quiet ring 4 and the clamp plate 3, be equipped with second quiet ring O type ring 44 between quiet ring 4 and the gland 2, be equipped with clamp plate O type ring 30 between clamp plate 3 and the gland 2.

To sum up, the utility model provides a rotating ring adopts the first structure of many spring rotation compensation, and the design of many springs can satisfy bear even load that compresses tightly on the big shaft diameter is sealed, and the cooperation uide pin makes sealed have great axial compensation ability, in addition the utility model provides a spring is along with the rotation of axes, the laminating that the ring face is better under the low-speed condition, in addition, when the deviation appears in the installation, the rotating ring can automatically regulated, can not cause sealed inefficacy and life-span influence because of the deviation of straightness that hangs down etc..

The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and are not intended to limit the present invention; it should be noted that, for those skilled in the art, without departing from the inventive concept, several variations and modifications can be made, which are within the scope of the present invention.

Claims (9)

1. A spring rotary shaft seal device for a water jet propulsion unit, comprising: the movable ring seat is connected with the spring seat through a plurality of third pins and third pin sleeves, the movable ring seat can axially move relative to the spring seat, the corrugated pipe is coated on one side of the movable ring seat and the spring seat, the supporting ring is arranged between the corrugated pipe and the movable ring seat and the spring seat, and the positioning ring is arranged on one side of the corrugated pipe.

2. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the movable ring seat is provided with an elliptical pin hole matched with the third pin.

3. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: be equipped with first spring holder O type circle between spring holder and the axle, be equipped with second spring holder O type circle between spring holder and the rotating ring seat, be equipped with rotating ring seat O type circle between rotating ring seat and the rotating ring, be equipped with first quiet ring O type circle between quiet ring and the clamp plate, be equipped with the quiet ring O type circle of second between quiet ring and the gland, be equipped with clamp plate O type circle between clamp plate and the gland.

4. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the bellows is made of viton.

5. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the movable ring is made of pressureless sintered silicon carbide materials, and the static ring is made of reaction sintered silicon carbide materials.

6. The spring rotary shaft seal device for a water jet propulsion system of claim 5, wherein: the hardness of the dynamic ring is HRA95, and the hardness of the static ring is HRA 90.

7. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the spring is made of nickel-chromium-molybdenum alloy containing tungsten.

8. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the first pin sleeve, the second pin sleeve and the third pin sleeve are all made of flexible materials.

9. The spring rotary shaft seal device for a water jet propulsion system of claim 1, wherein: the spring seat is connected with the shaft through a clamping sleeve and a set screw.

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