CN216519602U - Steam and water seal structure for steam compressor - Google Patents

Abstract

The utility model relates to the technical field of steam compressor sealing, in particular to a steam and water sealing structure for a steam compressor, which comprises a transmission box body, a box body oil seal, a rotating shaft, a shaft sleeve and a sealing mechanism, wherein the sealing mechanism comprises a cavity partition wall, a sealing body and a sealing assembly, the sealing body is provided with a plurality of steam sealing teeth, a flow discharge ring groove, holes and an external sealing connecting hole, when the steam compressor works, the pressure of a threaded interface at the upper part of the middle part of the sealing body is slightly greater than the pressure of a steam compressor cavity, and the sealing steam is higher than the atmospheric pressure, the sealing steam passes through the sealing component and the labyrinth seal to realize the stable steam pressure of the steam pressing machine cavity body at the front side of the sealing body, meanwhile, because the sealing steam is subjected to the sealing component at one side of the sealing body and the labyrinth seal and is matched with the box body oil seal integrating the labyrinth seal and the sealing component for use, water cannot flow into the transmission box body, therefore, the problem that the existing compressor cavity steam seal structure cannot effectively restrain sealed steam from flowing to the transmission box body is solved.

Description

Steam and water seal structure for steam compressor

Technical Field

The utility model relates to the technical field of steam compressor sealing, in particular to a steam and water seal structure for a steam compressor.

Background

With the development of the domestic environmental protection industry, the centrifugal vapor compressor is widely applied to the domestic chemical, energy and medicine industries of evaporation, crystallization, pipeline pressurization and the like, but the problems of more and more obvious vapor leakage, transmission box body water inlet, lubricating oil emulsification, bearing and rotor system failure, compressor stalling and the like in the compressor industry are caused, the normal operation of the vapor compressor and the system thereof is seriously influenced, the great difficulty is caused to the production, and the high-quality development of vapor compressor manufacturers and even the compressor industry is restricted.

The existing compressor cavity steam seal can not effectively prevent sealed steam from flowing and leaping up to the transmission case body, so that serious consequences such as water inlet, lubricating oil emulsification and transmission failure of the transmission case body are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a steam and water seal structure for a steam compressor, and aims to solve the problem that the steam seal of a cavity of the existing compressor cannot effectively prevent sealed steam from flowing to a transmission box body and leaping up.

In order to achieve the purpose, the utility model provides a steam and water seal structure for a steam compressor, which comprises a transmission box body, a box body oil seal, a rotating shaft, a shaft sleeve and a sealing mechanism, wherein the box body oil seal is detachably connected with the transmission box body and is positioned on the outer side wall of the transmission box body, the rotating shaft is arranged on the inner side of the box body oil seal, the shaft sleeve is arranged on the periphery of the rotating shaft, the sealing mechanism is arranged on the periphery of the shaft sleeve, and the radial clearance between the shaft sleeve and the sealing mechanism is 0.03 mm-0.05 mm.

Sealing mechanism includes cavity partition wall, seal and seal assembly, the seal has a plurality of gland seal teeth, earial drainage annular and hole and outside seal and connects the hole, every gland seal tooth axial interval 4 mm-5 mm, and per two are adjacent the gland seal tooth forms a first sealed chamber, first sealed chamber with the axle sleeve forms labyrinth seal, the seal with the cavity partition wall is dismantled and is connected, and set up in the periphery of axle sleeve, and be located the cavity partition wall with between the axle sleeve, seal assembly set up in the seal, encircle set up in the axle sleeve periphery, form the carbocycle with affiliated axle sleeve and seal.

Wherein, seal assembly includes carbocycle, wave spring and pin, the carbocycle set up in on the seal, the wave spring cover is located the carbocycle with seal between the body, the pin with seal body small gap axle, hole cooperation are connected to be located the seal and be close to one side of carbocycle.

Wherein, seal assembly includes carbocycle, wave spring and pin, the carbocycle set up in on the seal, the wave spring cover is located the carbocycle with between the seal, the pin with the little clearance axle of seal, hole cooperation are connected, and are located the seal is close to one side of carbocycle.

The steam and water seal structure for the steam compressor further comprises a first screw, a first gasket and an O-shaped sealing ring, the first screw is in threaded connection with the cavity partition wall and penetrates through the seal body, the first gasket is arranged between the screw and the seal body, the O-shaped sealing ring is sleeved on the seal body, the cavity partition wall is provided with an O-shaped sealing ring groove, and the O-shaped sealing ring groove form an end face and a radial seal.

The steam and water seal structure for the steam compressor further comprises a second screw and a second gasket, the second screw is in threaded connection with the transmission box body and penetrates through the box body oil seal, and the second gasket is arranged between the second screw and the box body oil seal.

The shaft sleeve is provided with a plurality of water isolating belts, and the water isolating belts are all positioned on one side, close to the sealing body, of the shaft sleeve.

According to the steam and water seal structure for the steam compressor, the transmission box body provides installation conditions for the box body oil seal and the rotating shaft, the rotating shaft provides installation conditions for the shaft sleeve, and the cavity partition wall provides installation conditions for the sealing mechanism. During operation, seal middle part top hickey connects pressure slightly to be greater than steam turbine cavity pressure, and is greater than atmospheric pressure's sealed steam, and sealed steam passes through seal assembly reaches labyrinth seal realizes the steam turbine cavity vapour pressure stability of seal front side, simultaneously sealed steam is because of receiving seal one side seal assembly labyrinth seal reaches set up under the seal tail semicircle week the earial drainage effect that earial drainage annular and hole played receives have the isolation band on the axle sleeve and keep off the effect, cooperate the collection labyrinth seal with seal assembly is in an organic whole the box oil blanket uses, and water will unable flow leap into in the transmission case to solve current compressor cavity gland seal can not effectively restrain sealed steam and flow the problem of leaping up to the transmission case.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a sectional view of a vapor/water seal structure for a vapor compressor according to the present invention.

Fig. 2 is a cross-sectional view taken along plane a-a of fig. 1.

1-transmission case body, 2-case body oil seal, 3-rotating shaft, 4-shaft sleeve, 5-sealing mechanism, 6-cavity partition wall, 7-sealing body, 8-sealing component, 9-steam seal tooth, 10-discharge ring groove and hole, 11-external sealing hole, 12-carbon ring, 13-wave spring, 14-pin, 15-first screw, 16-first gasket, 17-O type sealing ring, 18-second screw, 19-second gasket, 20-water partition strip and 21-O type sealing ring groove shape.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 2, the utility model provides a steam and water seal structure for a vapor compressor, which comprises a transmission case 1, a case oil seal 2, a rotating shaft 3, a shaft sleeve 4 and a sealing mechanism 5, wherein the case oil seal 2 is detachably connected with the transmission case 1 and is positioned on the outer side wall of the transmission case 1, the rotating shaft 3 is arranged on the inner side of the case oil seal 2, the shaft sleeve 4 is arranged on the periphery of the rotating shaft 3, the sealing mechanism 5 is arranged on the periphery of the shaft sleeve 4, and the radial clearance between the shaft sleeve and the sealing mechanism is 0.03 mm-0.05 mm.

Sealing mechanism 5 includes cavity partition wall 6, seal 7 and seal assembly 8, seal 7 has a plurality of gland seal teeth 9, earial drainage annular and hole 10 and outside sealed hole 11, every gland seal tooth axial interval 4 mm-5 mm, every two are adjacent gland seal tooth 9 forms a first sealed chamber, first sealed chamber with axle sleeve 4 forms labyrinth seal, seal 7 with cavity partition wall 6 is dismantled and is connected, and is located cavity partition wall 6 with between the axle sleeve 4, seal assembly 8 set up in the seal, encircle set up in the axle sleeve periphery, with axle sleeve 4 forms the carbocycle and seals.

In this embodiment, the transmission case 1 provides the installation condition for the case oil seal 2 and the rotation axis 3, the rotation axis 3 provides the installation condition for the shaft sleeve 4, the cavity partition wall 6 provides the installation condition for the sealing mechanism 5, during operation, the upper screw interface connection pressure of the middle part of the seal body 7 is slightly larger than the pressure of the cavity of the steam compressor, and is larger than the sealing steam of atmospheric pressure, the sealing steam passes through the sealing assembly 8 and the labyrinth seal, so as to realize the pressure stability of the steam pressure of the cavity of the steam compressor at the front side of the seal body 7, meanwhile, the sealing steam is matched with the case oil seal 2 which integrates the labyrinth seal and the sealing assembly 8 into a whole for use due to the leakage function of the sealing assembly 8 at one side of the seal body 7, the labyrinth seal and the lower half circumference of the tail part of the seal body 7, the leakage ring groove and the hole 10 are provided on the shaft sleeve 4 for blocking the isolation function, water cannot flow into the transmission case body 1, so that the problem that the existing compressor cavity steam seal cannot effectively prevent sealed steam from flowing into the transmission case body is solved.

Further, seal assembly 8 includes carbocycle 12, wave spring 13 and pin 14, carbocycle 12 set up in seal on the body 7, wave spring 13 cover is located carbocycle 12 with seal between the body 7, pin 14 with seal 7 little clearance axle, hole cooperation are connected, and are located seal 7 is close to one side of carbocycle 12.

In this embodiment, the wave spring 13 with a pre-tightening force is wound around the periphery of the carbon ring 12 to form a radial constraint force and an axial constraint force on the carbon ring 12, so that the carbon ring 12 is tightly attached to the wall surface of the sealing body 7 to form end face sealing on gas in a cavity of the compressor, and simultaneously, the carbon ring 12 and the shaft sleeve 4 sleeved on the rotating shaft 3 always keep a radial gap of 0.03 mm-0.05 mm to form radial sealing on gas in the cavity.

Further, vapor, water seal structure for steam compressor still include first screw 15, first packing ring 16 and O type sealing washer 17, first screw 15 with 6 threaded connection of cavity partition wall, and run through seal 7, first packing ring 16 set up in the screw with between the seal 7, O type sealing washer 17 cover is established on seal 7, cavity partition wall 6 has O type sealing washer groove 21, O type sealing washer 17 with O type sealing washer groove 21 forms terminal surface, radial seal.

In this embodiment, the cavity partition 6 and the sealing body 7 can be fixed more firmly by the first screws 15, the contact area of the first screws 15 is increased by the first washers 16 to prevent the first screws 15 from loosening, and the sealing property between the wall partition and the sealing body 7 is increased by the O-rings 17.

Further, vapor and water seal structure for vapor compressor still includes second screw 18 and second packing ring 19, second screw 18 with transmission case 1 threaded connection to run through case oil blanket 2, second packing ring 19 set up in second screw 18 with between the case oil blanket 2 spare.

In the present embodiment, the transmission case 1 and the case oil seal 2 can be fixed more firmly by the second screw 18, and the second screw 18 is prevented from loosening by increasing the contact area of the second screw 18 by the second washer 19.

Furthermore, the shaft sleeve 4 is provided with a plurality of water blocking belts 20, and the plurality of water blocking belts 20 are all positioned on one side of the shaft sleeve 4 close to the sealing body 7.

In the present embodiment, the water shut-off strips 20 can shut off the axial flow of the seal water.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.

Claims (5)

1. A steam and water seal structure for a steam compressor, which is characterized in that,

the box oil seal is detachably connected with the transmission box and is positioned on the outer side wall of the transmission box, the rotating shaft is arranged on the inner side of the box oil seal, the shaft sleeve is arranged on the periphery of the rotating shaft, the sealing mechanism is arranged on the periphery of the shaft sleeve, and the radial clearance between the shaft sleeve and the sealing mechanism is 0.03-0.05 mm;

sealing mechanism includes cavity partition wall, seal and seal assembly, the seal has a plurality of gland seal teeth, earial drainage annular and hole and outside seal and connects the hole, every gland seal tooth axial interval 4 mm-5 mm, every two are adjacent the gland seal tooth forms a first sealed chamber, first sealed chamber with the axle sleeve forms labyrinth seal, the seal with the cavity partition wall is dismantled and is connected, and set up in the periphery of axle sleeve, and be located the cavity partition wall with between the axle sleeve, seal assembly set up in the seal, encircle set up in the axle sleeve periphery.

2. The vapor-water seal structure for vapor compressors according to claim 1,

the seal assembly comprises a carbon ring, a wave spring and a pin, wherein the carbon ring is arranged on the seal body, the wave spring is sleeved on the carbon ring and is arranged between the seal body, the pin is connected with the seal body through a small-gap shaft and a hole in a matched mode, and the seal body is located close to one side of the carbon ring.

3. The vapor-water seal structure for vapor compressors according to claim 1,

steam, water seal structure for vapor compressor still include first screw, first packing ring and O type sealing washer, first screw with cavity partition wall threaded connection, and run through the seal, first packing ring set up in the screw with seal between the body, O type sealing washer cover is established on the seal, the cavity partition wall has O type sealing washer groove, O type sealing washer with O type sealing washer groove formation terminal surface, radial seal.

4. The vapor-water seal structure for vapor compressors according to claim 1,

the steam and water seal structure for the steam compressor further comprises a second screw and a second gasket, the second screw is in threaded connection with the transmission box body and penetrates through the box body oil seal, and the second gasket is arranged between the second screw and the box body oil seal.

5. The vapor-water seal structure for vapor compressors according to claim 1,

the shaft sleeve is provided with a plurality of water isolation belts which are all positioned on one side of the shaft sleeve close to the sealing body.

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