CN210715953U - Heavy machinery sealing device - Google Patents

Abstract

The utility model discloses a heavy-duty mechanical sealing device, comprising: a shaft sleeve, a sealing box body, a bearing box body, a kettle mouth flange and a sealing gland, the sealing box body and the bearing box body are sleeved outside the shaft sleeve, and the shaft sleeve is connected with A first moving ring, a first spring, a first spring seat and a spring seat insert ring are arranged between the sealing boxes, the spring seat insert ring is sleeved on the shaft sleeve, the first spring seat is installed on the spring seat insert ring, and the shaft A second moving ring, a second spring and a second spring seat are also arranged between the sleeve and the sealing box, the second spring seat is sleeved on the shaft sleeve, a first static ring is arranged under the first moving ring, the second A second static ring is arranged above the moving ring, and a self-aligning roller bearing is also arranged between the bearing box and the shaft sleeve; The heavy bearing box can effectively control and prevent the radial swing of the main shaft, so that the sealing device can be used as a fulcrum, and the purpose of using the frame without fulcrum and the three-part coupling is used.

Description

Heavy Duty Mechanical Seals

technical field

The utility model relates to a mechanical sealing device, in particular to a heavy-duty mechanical sealing device.

Background technique

A mechanical seal is a shaft sealing device for rotating machinery. Such as centrifugal pumps, centrifuges, reactors and compressors and other equipment. Since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment, and the medium in the equipment leaks out through the gap, so there must be a shaft sealing device to prevent leakage.

For a frame without a fulcrum, the structural strength of the existing sealing device is not enough to satisfy the condition of using the sealing device as a fulcrum, and the radial swing of the main shaft affects the sealing efficiency of the sealing device.

Utility model content

In order to solve the above technical problems, the utility model proposes a heavy-duty mechanical sealing device to effectively control and prevent the radial swing of the main shaft, so that the sealing device is used as a fulcrum, and is used in conjunction with a frame without a fulcrum and a three-part coupling. the goal of.

In order to achieve the above purpose, the technical scheme of the present utility model is as follows: a heavy-duty mechanical sealing device, the device comprises: a shaft sleeve, a sealing box body, a bearing box body, a kettle mouth flange and a sealing gland, the sealing box body and The bearing box body is sleeved outside the shaft sleeve, the bearing box body is arranged above the sealing box body, the kettle mouth flange is fixedly connected under the sealing box body, and a third is arranged between the shaft sleeve and the sealing box body. A moving ring, a first spring abutting against the top of the first moving ring, a first spring seat for installing the first spring, and a spring seat insert ring, the spring seat insert ring is sleeved on the shaft sleeve, the first spring seat A spring seat is installed on the spring seat insert ring, a second moving ring, a second spring abutting against the bottom end of the second moving ring, and a second spring for installing the second spring are further arranged between the shaft sleeve and the sealing box A second spring seat, the second spring seat is sleeved on the shaft sleeve, a first static ring adapted to the first moving ring is arranged below the first moving ring, and the first static ring is fixedly arranged on In the sealing box and the flange of the kettle mouth, a second static ring adapted to the second moving ring is arranged above the second moving ring, and the second static ring is arranged between the bearing box and the shaft sleeve, so A self-aligning roller bearing is also arranged between the bearing housing and the shaft sleeve, the sealing gland is sleeved on the shaft sleeve, and the sealing gland is fixedly arranged above the bearing housing.

Compared with the prior art, the present application can effectively control and prevent the radial swing of the main shaft by arranging a spherical roller bearing on the shaft sleeve and a thick bearing housing on the spherical roller bearing, so that the sealing device can be effectively controlled and prevented. Used as a fulcrum, with a fulcrumless frame and a three-part coupling.

Further, a clamping ring is sleeved on the shaft sleeve, and the clamping ring facilitates the connection between the shaft sleeve and the main shaft.

Further, the clamping ring includes an upper clamping ring and a lower clamping ring, and the upper clamping ring and the lower clamping ring are fixedly connected by bolts.

Further, the first moving ring is sleeved on the spring seat insert ring, a first sealing ring is arranged between the first moving ring and the spring seat insert ring, and the first seal ring is an O-ring, which effectively improves the device. sealing effect.

Further, a second sealing ring is arranged between the spring seat insert ring and the shaft sleeve, and the second sealing ring is an O-ring, which effectively improves the sealing effect of the device.

Further, the bottom end of the spring seat insert ring is provided with an inner edge extending inward, and a tetrafluoro gasket is arranged between the inner edge and the bottom end face of the shaft sleeve, and the tetrafluoro gasket can effectively avoid the shaft sleeve. The ends rub against the spring seat inserts.

Further, a third sealing ring is arranged between the second static ring and the bearing housing, and the third sealing ring is an O-ring, which effectively improves the sealing effect of the device.

Further, the upper and lower ends of the self-aligning roller bearing are provided with spring retaining rings for the shaft. The spherical roller bearing moves axially on the sleeve.

Further, a positioning card is fixed above the sealing gland, the positioning card is sleeved on the shaft sleeve, and the positioning card increases the stability of the device structure.

Further, a skeleton oil seal is arranged between the bearing housing and the shaft sleeve to effectively seal.

The utility model has the following advantages:

The utility model can effectively control and prevent the radial swing of the main shaft by arranging the self-aligning roller bearing on the shaft sleeve and the thick bearing box on the self-aligning roller bearing, so that the sealing device is used as a fulcrum, and there is no Pivot frame and three-part coupling are used.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art.

1 is a schematic structural diagram of a heavy-duty mechanical sealing device disclosed in an embodiment of the present utility model;

Corresponding part names represented by numbers and letters in the figure:

1. Shaft sleeve; 2. Sealed box; 3. Bearing box; 4. Flange of kettle mouth; 5. Sealed gland; 6. First moving ring; 7. First spring; 8. First spring seat; 9 , spring seat insert ring; 10, second dynamic ring; 11, second spring; 12, second spring seat; 13, first static ring; 14, second static ring; 15, spherical roller bearing; 16, Clamping ring; 17, PTFE gasket; 18, positioning card; 19, skeleton oil seal.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The utility model provides a heavy-duty mechanical sealing device, the working principle of which is that a self-aligning roller bearing is sleeved on a shaft sleeve, and a thick bearing box is sleeved on the self-aligning roller bearing, so as to achieve effective control and safety. Prevent the radial swing of the main shaft, make the sealing device used as a fulcrum, and cooperate with the frame without fulcrum and the three-part coupling.

The present utility model will be described in further detail below in conjunction with the examples and specific implementations.

As shown in Figure 1, a heavy-duty mechanical sealing device includes: a shaft sleeve 1, a sealing box 2, a bearing box 3, a kettle flange 4 and a sealing gland 5, the sealing box 2 and the bearing The box body 3 is sleeved outside the shaft sleeve 1, the bearing box body 3 is arranged above the sealing box body 2, the kettle mouth flange 4 is fixedly connected under the sealing box body 2, and the shaft sleeve 1 is connected to the sealing box body 2. A first moving ring 6, a first spring 7 abutting against the top of the first moving ring 6, a first spring seat 8 for installing the first spring 7, and a spring seat insert ring 9 are arranged between the bodies 2. The spring The seat insert ring 9 is sleeved on the shaft sleeve 1 , the first spring seat 8 is installed on the spring seat insert ring 9 , and a second moving ring 10 is also arranged between the shaft sleeve 1 and the sealing box 2 , and The second spring 11 abutting against the bottom end of the second moving ring 10 and the second spring seat 12 for installing the second spring 11, the second spring seat 12 is sleeved on the shaft sleeve 1, the first moving ring A first static ring 13 adapted to the first moving ring 6 is arranged below the A second static ring 14 adapted to the second dynamic ring 10 is provided, the second static ring 14 is arranged between the bearing housing 3 and the shaft sleeve 1 , and there is also a gap between the bearing housing 3 and the shaft sleeve 1 . A spherical roller bearing 15 is provided, the sealing gland 5 is sleeved on the shaft sleeve 1 , and the sealing gland 5 is fixedly arranged above the bearing housing 3 .

Among them, the bearing box 3 and the sealing box 2 are fixedly connected by screws, the sealing box 2 and the kettle mouth flange 4 are fixedly connected by screws, and the sealing gland 5 and the bearing box 3 are fixedly connected by screws, The first spring seat 8 is mounted on the spring seat insert ring 9 by screws, the second spring seat 12 is mounted on the shaft sleeve 1 by screws,

The sealing box 2 is provided with a sealing liquid inlet and a cooling water inlet, and the bearing box 3 is provided with a leakage port, an oil filling hole, a sealing liquid outlet and a cooling liquid outlet.

Compared with the prior art, the present application can effectively control and prevent the radial swing of the main shaft by arranging a spherical roller bearing 15 on the shaft sleeve 1 and a thick bearing housing 3 on the spherical roller bearing 15 . , so that the sealing device is used as a fulcrum, and it is used with a frame without fulcrum and a three-part coupling.

Wherein, a clamping ring 16 is sleeved on the shaft sleeve 1 , and the clamping ring 16 helps the shaft sleeve 1 to be connected with the main shaft.

The clamping ring 16 includes an upper clamping ring and a lower clamping ring, and the upper clamping ring and the lower clamping ring are fixedly connected by bolts.

Wherein, the first moving ring 6 is sleeved on the spring seat insert ring 9, a first sealing ring is arranged between the first moving ring 6 and the spring seat insert ring 9, and the first sealing ring is an O-ring, Effectively improve the sealing effect of the device.

Wherein, a second sealing ring is arranged between the spring seat insert ring 9 and the shaft sleeve 1, and the second sealing ring is an O-ring, which effectively improves the sealing effect of the device.

Wherein, the bottom end of the spring seat insert ring 9 is provided with an inner edge extending inward, and a tetrafluoro gasket 17 is provided between the inner edge and the bottom end face of the shaft sleeve 1, and the tetrafluoro gasket 17 is effective Avoid friction between the end of the shaft sleeve 1 and the spring seat insert ring 9 .

Wherein, a third sealing ring is arranged between the second static ring 14 and the bearing housing 3, and the third sealing ring is an O-ring, which effectively improves the sealing effect of the device.

Wherein, the upper and lower ends of the self-aligning roller bearing 15 are provided with a shaft elastic retaining ring, and the shaft elastic retaining ring is sleeved on the shaft sleeve 1, and the elastic retaining ring effectively fixes the self-aligning roller bearing 15, The spherical roller bearing 15 is prevented from moving axially on the sleeve 1 .

Wherein, a positioning card 18 is fixed above the sealing gland 5, the positioning card 18 is sleeved on the shaft sleeve 1, and the positioning card 18 increases the stability of the device structure.

The positioning card 18 is connected with the sealing gland 5 by screws.

A skeleton oil seal 19 is arranged between the bearing housing 3 and the shaft sleeve 1 to effectively seal.

After the heavy-duty mechanical sealing device is sleeved on the main shaft, the spherical roller bearing 15 and the heavy bearing housing 3 can effectively control and prevent the radial swing of the main shaft, so that the sealing device can be used as a fulcrum. Split couplings are used.

The above is only a preferred embodiment of the heavy-duty mechanical sealing device disclosed by the present invention. Several modifications and improvements have been made, which all belong to the protection scope of the present invention.

Claims (10)

1. A heavy mechanical seal, the seal comprising: the sealing box body and the bearing box body are sleeved outside the shaft sleeve, the bearing box body is arranged above the sealing box body, the kettle port flange is fixedly connected below the sealing box body, a first movable ring, a first spring seat and a spring seat embedding ring are arranged between the shaft sleeve and the sealing box body, the first spring is abutted to the top end of the first movable ring, the first spring seat is used for installing the first spring, the spring seat embedding ring is sleeved on the shaft sleeve, the first spring seat is installed on the spring seat embedding ring, a second movable ring, a second spring is abutted to the bottom end of the second movable ring, and a second spring seat is used for installing the second spring is further arranged between the shaft sleeve and the sealing box body, the second spring seat is sleeved on the shaft sleeve, a first static ring matched with the first movable ring is arranged below the first movable ring, and the first static ring is fixedly arranged in the sealing box body and the kettle port flange, the top of second rotating ring is provided with the quiet ring of second with the adaptation of second rotating ring, the quiet ring setting of second is between bearing box and axle sleeve, still be provided with self-aligning roller bearing between bearing box and the axle sleeve, gland cover establishes on the axle sleeve, gland fixes the top that sets up at the bearing box.

2. The heavy mechanical seal of claim 1, wherein the shaft sleeve is sleeved with a clamping ring.

3. The heavy mechanical seal of claim 2, wherein the clamping ring comprises an upper clamping ring and a lower clamping ring, and the upper clamping ring and the lower clamping ring are fixedly connected through bolts.

4. The heavy mechanical seal of claim 1, wherein the first rotating ring is sleeved on the spring seat insert ring, and a first seal ring is disposed between the first rotating ring and the spring seat insert ring.

5. The heavy mechanical seal device of claim 1, wherein a second seal ring is disposed between the spring seat insert ring and the shaft sleeve.

6. The heavy mechanical seal device according to claim 1, wherein the bottom end of the spring seat insert ring is provided with an inner edge extending inwards, and a tetrafluoro gasket is arranged between the inner edge and the bottom end face of the shaft sleeve.

7. The heavy mechanical seal of claim 1, wherein a third seal ring is disposed between the second stationary ring and the bearing housing.

8. The heavy mechanical seal device according to claim 1, wherein elastic retaining rings for shafts are arranged at the upper end and the lower end of the self-aligning roller bearing, and the elastic retaining rings for shafts are sleeved on the shaft sleeve.

9. The heavy mechanical seal device according to claim 1, wherein a positioning clip is fixedly disposed above the seal gland, and the positioning clip is sleeved on the shaft sleeve.

10. The heavy mechanical seal device of claim 1, wherein a skeleton oil seal is arranged between the bearing box and the shaft sleeve.

Images