CN111895092B - Shaft sealing device of compressor - Google Patents
Shaft sealing device of compressor Download PDFInfo
- Publication number
- CN111895092B CN111895092B CN202010616970.XA CN202010616970A CN111895092B CN 111895092 B CN111895092 B CN 111895092B CN 202010616970 A CN202010616970 A CN 202010616970A CN 111895092 B CN111895092 B CN 111895092B
- Authority
- CN
- China
- Prior art keywords
- ring
- point contact
- contact type
- sealing
- coaxially
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/181—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings for plastic packings
Abstract
The invention relates to the field of shaft sealing, in particular to a shaft sealing device of a compressor, which is used for sealing and coaxially connecting a crankshaft with the compressor, and comprises: the end cover is coaxially arranged at the end part of the support ring through a sealing washer, the crankshaft is coaxially and rotatably arranged in the support ring and penetrates through the end cover, and the support ring is coaxially provided with a first mounting part and a second mounting part from inside to outside; the large bearing is coaxially arranged at the end part of the first mounting part, and the small bearing is coaxially arranged at the outer end part of the end cover; the double-ring point contact type arc-shaped sealing part is coaxially arranged at the inner end part of the second mounting part, and the double-point inner ring of the double-ring point contact type arc-shaped sealing part is abutted against the circumference surface of the crankshaft; first ring point contact seal portion and second ring point contact seal portion, first ring point contact seal portion coaxial fixed sets up in the tip of second installation department, and the device seals through twice seal structure, and rotatory frictional force is little, and the installation is simple.
Description
Technical Field
The invention relates to the field of shaft sealing, in particular to a shaft sealing device of a compressor.
Background
The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The motor is operated to drive the piston to compress the refrigerant gas, and the high-temperature and high-pressure refrigerant gas is discharged to the exhaust pipe to provide power for the refrigeration cycle. Thereby realizing a refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption). The compressors are classified into piston compressors, screw compressors, centrifugal compressors, linear compressors, and the like. The terms introduce the working principle, classification, accessories, specifications, operation requirements, production, common faults and environmental protection requirements, model selection principle, installation conditions and development trend of the compressor. In a compressor, a shaft seal device is generally provided on a shaft in order to prevent a compressed gas from leaking out along the shaft and lowering compression efficiency when the shaft is installed.
Chinese patent CN201610393744.3 discloses a shaft sealing structure and a compressor, wherein the shaft sealing structure comprises a shaft, a bracket and an end cover, the end cover is arranged at an end of the bracket, the shaft is rotatably arranged at the end of the bracket and passes through the end cover; a seal disposed on said shaft adjacent said end of said carrier, a first seal portion of said seal being disposed within a first groove disposed in one of said end of said carrier and said end cap or spanning between said end cap and said end of said carrier; the second seal portion of the seal is disposed between the shaft and the bracket.
This shaft seal structure only seals through the sealing, and the axle is when high-speed rotation, the axle produces high temperature with the sealing, easily makes the sealing deformation and leads to losing sealed effect.
Disclosure of Invention
In order to solve the technical problem, the technical scheme provides a shaft sealing device of a compressor, and the shaft sealing device solves the problem that the shaft and a sealing part rub to generate high temperature to cause sealing failure under the condition of high-speed rotation of the compressor shaft.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a shaft seal assembly for a compressor for sealingly and coaxially coupling a crankshaft to the compressor, the shaft seal assembly comprising: the compressor comprises a support ring and an end cover, wherein the support ring is coaxially arranged at the end part of the compressor, the end cover is coaxially arranged at the end part of the support ring through a sealing washer, a crankshaft is coaxially and rotatably arranged in the support ring and penetrates through the end cover, the support ring is coaxially provided with a first installation part and a second installation part from inside to outside, a step edge is arranged between the installation parts, and the inner diameter of the step edge is larger than the diameter of the crankshaft; the large bearing is coaxially arranged at the end part of the first mounting part, the small bearing is coaxially arranged at the outer end part of the end cover, and the inner ring of the bearing is coaxially and fixedly connected with the crankshaft; the double-ring point contact type arc-shaped sealing part is coaxially arranged at the inner end part of the second mounting part, and the double-point inner ring of the double-ring point contact type arc-shaped sealing part is abutted against the circumference surface of the crankshaft; first ring point contact sealing and second ring point contact sealing, first ring point contact sealing coaxial fixation sets up in the tip of second installation department, first ring point contact sealing ring point outer lane is outwards, and first ring point contact sealing internal diameter is greater than the spindle diameter, second ring point contact sealing coaxial fixation sets up on the spindle, second ring point contact sealing ring point inner circle is inwards, and second ring point contact sealing external diameter is less than second installation department internal diameter, sealing ring point internal diameter is different, just its other side terminal surface of relative butt of sealing ring point butt circle.
Preferably, an inner ring mounting groove is coaxially arranged on the inner circumferential surface of the first mounting part; dicyclo point-contact arc sealing portion is including interior slot rubber circle and retainer plate, interior slot rubber circle outer lane passes through the coaxial fixed setting of retainer plate in the inner ring mounting groove, interior slot rubber circle slot part both ends internal diameter is less than the spindle diameter.
Preferably, first joint pieces are evenly distributed on two end faces of the fixing ring along the axial direction, joint ports embedded with the first joint pieces are evenly distributed on the end face of the inner ring installation groove, and the fixing ring is coaxially clamped in the inner ring installation groove through the first joint pieces.
Preferably, the two sides of the inlet end of the inner ring installation groove are provided with inclined guide surfaces convenient for the first clamping blocks to be embedded and slide.
Preferably, the first ring point-contact type sealing portion includes: the outer diameter of the first fixing ring is larger than the diameter of the crankshaft, the first fixing ring is coaxially arranged in the second mounting part, the first fixing ring is positioned at the outer end part of the double-ring point-contact arc-shaped sealing part, and second clamping blocks are uniformly distributed on the outer end surface of the first fixing ring along the axial direction; the inner diameter of the first sealing ring is larger than the diameter of the crankshaft, the first clamping grooves which are uniformly distributed along the axial direction and embedded with the second clamping blocks are coaxially arranged at the outer end part of the first fixing ring, and the outer end surface of the first sealing ring is also coaxially provided with a first semicircular ring which is abutted to the inner end surface of the second annular point contact type sealing part.
Preferably, the first ring point-contact type sealing portion further comprises a first fixed slip ring, the outer diameter of the first fixed slip ring is larger than the diameter of the crankshaft, the first fixed slip ring is coaxially arranged on the outer end face of the first fixed slip ring, and second half rings in sliding fit with the circumferential face of the crankshaft are axially arranged on the outer circumferential face of the first fixed slip ring at equal intervals.
Preferably, the second ring point-contact type sealing portion includes: the outer diameter of the second fixing ring is smaller than the inner diameter of the second mounting part, the outer end face of the second fixing ring is coaxially and fixedly arranged on the crankshaft through a mounting ring, and third clamping blocks are uniformly distributed on the inner end face of the second fixing ring along the axial direction; and the outer diameter of the second sealing ring is smaller than the inner diameter of the second mounting part, the second clamping grooves which are uniformly distributed along the axial direction and embedded with the third clamping blocks are coaxially arranged on the inner end surface of the second fixing ring, and the inner end surface of the second sealing ring is also coaxially provided with a third semicircular ring which is abutted against the outer end surface of the first ring point contact type sealing part.
Preferably, a second semicircular clamping groove is axially formed in the outer circumferential surface of the crankshaft, which is located on the first mounting portion, and an inclined sliding groove is formed towards the outer end of the second semicircular clamping groove; first semicircular clamping grooves are uniformly distributed on the circumferential surface of the mounting ring along the axial direction; the second ring point contact type sealing portion further comprises a fixing pin, and under the installation state, the fixing pin is inserted into a round groove formed by the second semicircular clamping groove and the first semicircular clamping groove through an inclined sliding groove in the axial direction.
Preferably, the second ring point-contact sealing portion further comprises a second fixed slip ring, the outer diameter of the second fixed slip ring is smaller than the inner diameter of the second mounting portion, the second fixed slip ring is coaxially arranged at the inner end of the second fixed ring, and fourth semicircular rings in sliding fit with the inner circumferential surface of the second mounting portion are axially and equidistantly arranged on the outer circumferential surface of the second fixed slip ring.
Preferably, the inner end face of the end cover is provided with a step edge abutting ring abutting against the outer end face of the fixing pin, and the inner end face of the step edge abutting ring is coaxially provided with a fifth semicircular ring abutting against the outer end face of the second fixing ring.
Compared with the prior art, the invention has the following beneficial effects:
1. the large bearing and the small bearing are matched together to enable the crankshaft to stably rotate relative to the support ring and the end cover, specifically, the end cover is coaxially arranged on the end face of the support ring through the sealing washer, and the crankshaft is coaxially arranged in the support ring through the large bearing and the small bearing and penetrates through the end cover, so that the crankshaft is ensured to stably and coaxially rotate relative to the support ring and the end cover;
2. the double-ring point-contact arc-shaped sealing part can prevent gas in the compressor from leaking into the sealing device, and particularly, the inner groove rubber ring is coaxially clamped in the inner ring mounting groove through the fixing ring and the first clamping block, so that when the crankshaft rotates, two ends of the groove part of the inner groove rubber ring are elastically abutted against the circumferential surface of the crankshaft, and the inner groove rubber ring is static relative to the crankshaft, so that the contact between the crankshaft and the double-ring point-contact arc-shaped sealing part is reduced, the first mounting part is ensured to be sealed relative to the second mounting part, and a first sealing effect is formed;
3. according to the invention, the sealing part mounting piece is fixedly arranged in a mode of welding the first fixing ring and riveting the fixing pin, specifically, the first fixing ring is coaxially welded in the first mounting part, and the fixing pin is coaxially inserted in the second semicircular clamping groove and the first semicircular clamping groove along the inclined chute, so that the mounting ring is fixedly connected with the crankshaft, and the first sealing ring and the second sealing ring are conveniently and respectively fixedly arranged;
4. the invention contacts the arc sealing part and the first ring point contact sealing part in a mutual ring point contact way through the double ring point contact, so that the friction force is reduced and the sealing performance is ensured, in particular, a first sealing ring and a second sealing ring are respectively and coaxially arranged on a second mounting part and a crankshaft through a first fixing ring and a second fixing ring, the inner diameter of the first annular point contact type sealing part is larger than the diameter of the crankshaft, the outer diameter of the second annular point contact type sealing part is smaller than the inner diameter of the second mounting part, the sealing part ring point abutting ring is relatively abutted against the opposite end surface, so that when the crankshaft rotates at high speed, the first semicircular ring and the third semicircular ring are respectively abutted against the outer end face of the second sealing ring and the inner end face of the first sealing ring for rotating friction, thereby avoiding the direct friction between the crankshaft and the sealing part, and ensuring the sealing of the second mounting part and the external air while reducing the friction force, thereby forming a second sealing effect;
5. according to the invention, through the two sealing structures, the gas in the compressor can be effectively prevented from leaking into the sealing device, the gas in the sealing device leaks to the outside, and the large-area direct contact between the crankshaft and the sealing part is reduced, so that the heat generated by rotation is reduced, and the possibility of thermal deformation of the sealing part is reduced.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a cross-sectional view at section B-B of FIG. 2;
FIG. 4 is an exploded perspective view of the bracket ring and dual ring point contact arc seal of the present invention;
FIG. 5 is a perspective view of the mounting of the bracket ring and the first ring point contact seal of the present invention;
FIGS. 6 and 7 are exploded perspective views of the first annular point-contact seal of the present invention at two different viewing angles;
fig. 8 is a perspective view of the crankshaft and the second ring point contact type sealing part of the present invention in an installed state;
fig. 9 and 10 are exploded perspective views of the second annular point-contact seal of the present invention at two different viewing angles;
fig. 11 is a perspective view of the end cap of the present invention.
Description of reference numerals:
a-a crankshaft; a1-second semicircular clamping groove; a2-inclined chute;
1-a support ring; 1 a-a first mounting portion; 1 b-a second mounting portion; 1 c-an inner ring mounting groove; 1c 1-card interface; 1c 2-inclined guide surface;
2-end cap; 2 a-step edge abutment ring; 2a 1-fifth half circle;
3-large bearing;
4-a small bearing;
5-double ring point contact type arc sealing part; 5 a-inner groove rubber ring; 5 b-a stationary ring; 5b1 — first clip block;
6-a first ring point-contact seal; 6 a-a first retainer ring; 6a 1-second snap block; 6 b-a first sealing ring; 6b 1-first snap groove; 6b 2-first semicircle; 6 c-a first stationary slip ring; 6c 1-second half-circle;
7-a second ring point contact seal; 7 a-a second retainer ring; 7a 1-third snap block; 7 b-a mounting ring; 7b 1-first semicircular snap groove; 7 c-a second seal ring; 7c 1-second snap groove; 7c 2-third half-circle; 7 d-a fixation pin; 7 e-a second stationary slip ring; 7e 1-fourth half circle;
8-sealing washer.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Referring to fig. 3, a shaft seal assembly for a compressor for sealingly and coaxially coupling a crankshaft a to the compressor, the shaft seal assembly comprising:
the compressor comprises a support ring 1 and an end cover 2, wherein the support ring 1 is coaxially arranged at the end part of the compressor, the end cover 2 is coaxially arranged at the end part of the support ring 1 through a sealing washer 8, a crankshaft A is coaxially and rotatably arranged in the support ring 1 and penetrates through the end cover 2, the support ring 1 is coaxially provided with a first installation part 1a and a second installation part 1b from inside to outside, a step edge is arranged between the installation parts, and the inner diameter of the step edge is larger than the diameter of the crankshaft A;
the bearing comprises a large bearing 3 and a small bearing 4, wherein the large bearing 3 is coaxially arranged at the end part of a first mounting part 1a, the small bearing 4 is coaxially arranged at the outer end part of an end cover 2, and a bearing inner ring is coaxially and fixedly connected with a crankshaft A;
the double-ring point contact type arc sealing part 5 is coaxially arranged at the inner end part of the second mounting part 1b, and the double-point inner ring of the double-ring point contact type arc sealing part 5 is abutted against the circumference surface of the crankshaft A;
first ring point contact seal portion 6 and second ring point contact seal portion 7, the coaxial fixed setting of first ring point contact seal portion 6 is in second installation department 1b tip, 6 ring point outer lane of first ring point contact seal portion is outwards, and 6 internal diameters of first ring point contact seal portion are greater than the spindle A diameter, 7 coaxial fixed settings of second ring point contact seal portion are on spindle A, 7 ring point inner circles of second ring point contact seal portion are inwards, and 7 external diameters of second ring point contact seal portion are less than the 1b internal diameter of second installation department, seal portion ring point internal diameter is different, just its other side terminal surface of relative butt joint of seal portion ring point butt joint circle.
The end cover 2 is coaxially arranged on the end face of the support ring 1 through a sealing washer 8, and the crankshaft A is coaxially and rotatably arranged in the support ring 1 through a large bearing 3 and a small bearing 4 and penetrates through the end cover 2, so that the crankshaft A is ensured to stably and coaxially rotate relative to the support ring 1 and the end cover 2;
the double-ring point contact type arc-shaped sealing part 5 is arranged between the first mounting part 1a and the second mounting part 1b and is arranged on the outer end face of the step edge, so that when the crankshaft A rotates, the double-point inner ring of the double-ring point contact type arc-shaped sealing part 5 is abutted against the circumferential face of the crankshaft A, the contact between the crankshaft A and the double-ring point contact type arc-shaped sealing part 5 is reduced, the first mounting part 1a is ensured to be sealed relative to the second mounting part 1b, and a first sealing effect is formed;
the first ring point contact type sealing part 6 and the second ring point contact type sealing part 7 are respectively and coaxially arranged on the second installation part 1b and the crankshaft A, the inner diameter of the first ring point contact type sealing part 6 is larger than the diameter of the crankshaft A, the outer diameter of the second ring point contact type sealing part 7 is smaller than the inner diameter of the second installation part 1b, and the ring point contact rings of the sealing parts are relatively abutted against the opposite end faces of the sealing parts, so that when the crankshaft A rotates at a high speed, the end faces of the sealing parts mutually rotate and rub, thereby avoiding the direct friction between the crankshaft A and the sealing parts, ensuring the sealing between the second installation part 1b and the external air while reducing the friction force, and further forming a second sealing effect;
thereby through twice seal structure, can effectively avoid the inside gas of compressor to reveal in the sealing device, and gas reveals to the outside among the sealing device, and reduces bent axle A and the large tracts of land direct contact of sealing for rotatory heat that produces reduces, reduces the possibility that the sealing was heated deformation.
As shown in fig. 4, an inner ring mounting groove 1c is coaxially provided on the inner circumferential surface of the first mounting portion 1 a; dicyclo point-contact arc seal portion 5 is including interior slot rubber circle 5a and retainer plate 5b, interior slot rubber circle 5a outer lane passes through the coaxial fixed setting of retainer plate 5b in interior ring mounting groove 1c, interior slot rubber circle 5a slot part both ends internal diameter is less than the spindle A diameter.
When interior slot rubber circle 5a passes through retainer plate 5b fixed setting in inner ring mounting groove 1c, and during spindle A high-speed rotation, the butt of 5a slot part both ends of interior slot rubber circle is on the spindle A periphery to make the inside gas of second installation department 1b can't get into among the sealing device through spindle A and the 5 rotating gap of dicyclo point-contact arc sealing portion, thereby realize first sealing, and compare traditional sealing washer butt, rotatory area of contact is little, and sealed effect is better.
As shown in fig. 4, the two end faces of the fixing ring 5b are uniformly distributed with first clamping blocks 5b1 along the axial direction, the end face of the inner ring installation groove 1c is uniformly distributed with clamping interfaces 1c1 embedded with the first clamping blocks 5b1, and the fixing ring 5b is coaxially clamped in the inner ring installation groove 1c through the first clamping blocks 5b 1.
The retainer plate 5b is coaxially clamped in the inner ring mounting groove 1c through the first clamping block 5b1, so that when the crankshaft A rotates at a high speed, the inner groove rubber ring 5a cannot synchronously rotate with the crankshaft A due to the action of friction force, the two ends of the groove part of the retainer plate 5b are enabled to be always abutted on the circumferential surface of the crankshaft A, and the sealing effect is better.
As shown in fig. 4, the two sides of the inlet end of the inner ring mounting groove 1c are provided with inclined guide surfaces 1c2 for the first clamping blocks 5b1 to be inserted and slid.
First joint piece 5b1 slides the gomphosis through oblique leading face 1c2 and inner ring mounting groove 1c to be convenient for when the installation, retainer plate 5b can joint in inner ring mounting groove 1c fast, is convenient for improve production efficiency.
As shown in fig. 5, 6 and 7, the first ring point-contact type seal portion 6 includes: the outer diameter of the first fixing ring 6a is larger than the diameter of the crankshaft A, the first fixing ring 6a is coaxially arranged in the second mounting part 1b, the first fixing ring 6a is positioned at the outer end part of the double-ring point contact type arc-shaped sealing part 5, and second clamping blocks 6a1 are uniformly distributed on the outer end surface of the first fixing ring 6a along the axial direction; the inner diameter of the first sealing ring 6b is larger than the diameter of the crankshaft a, first clamping grooves 6b1 which are embedded with the second clamping blocks 6a1 are uniformly distributed on the inner end surface along the axial direction and are coaxially arranged at the outer end part of the first fixing ring 6a, and a first semi-circular ring 6b2 which is abutted against the inner end surface of the second point-contact sealing part 7 is further coaxially arranged on the outer end surface of the first sealing ring 6 b.
As shown in fig. 5, 6 and 7, the first ring point contact type sealing portion 6 further includes a first fixed slip ring 6c having an outer diameter larger than that of the crankshaft a and coaxially disposed on the outer end surface of the first fixed ring 6a, and a second semi-circular ring 6c1 slidably engaged with the circumferential surface of the crankshaft a is axially disposed on the outer circumferential surface of the first fixed slip ring 6c at equal intervals.
The first fixed slip ring 6c is coaxially arranged on the outer end face of the first fixed ring 6a, and the outer circumferential face of the first fixed slip ring 6c is provided with second semi-circular rings 6c1 which are in sliding fit with the circumferential face of the crankshaft a at equal intervals along the axial direction, so that the sealing stability of the first sealing ring 6b is improved when the crankshaft a rotates at a high speed.
As shown in fig. 8, 9 and 10, the second annular point-contact seal portion 7 includes: the outer diameter of the second fixing ring 7a is smaller than the inner diameter of the second mounting part 1b, the outer end face of the second fixing ring is coaxially and fixedly arranged on the crankshaft A through a mounting ring 7b, and third clamping blocks 7a1 are uniformly distributed on the inner end face of the second fixing ring 7a along the axial direction; and the outer diameter of the second sealing ring 7c is smaller than the inner diameter of the second mounting part 1b, second clamping grooves 7c1 which are embedded with the third clamping blocks 7a1 are uniformly distributed along the axial direction on the outer end surface and are coaxially arranged on the inner end surface of the second fixing ring 7a, and a third semicircular ring 7c2 which is abutted against the outer end surface of the first ring point contact type sealing part 6 is further coaxially arranged on the inner end surface of the second sealing ring 7 c.
The second fixing ring 7a is coaxially arranged in the second mounting part 1b, so that when the crankshaft a rotates at a high speed, the crankshaft a drives the second fixing ring 7a to rotate at a high speed through the mounting ring 7b, and the second sealing ring 7c is clamped with the third clamping block 7a1 through the second clamping groove 7c1, so that the crankshaft a drives the second sealing ring 7c to synchronously rotate, so that the third semicircular ring 7c2 coaxially abuts against the outer end face of the first ring point contact type sealing part 6 to rotate at a high speed, and therefore no leakage gap is formed between the first ring point contact type sealing part 6 and the second ring point contact type sealing part 7 when the crankshaft a rotates, and the sealing performance of the device is improved.
As shown in fig. 8, 9 and 10, a second semicircular clamping groove a1 is axially formed in the outer circumferential surface of the crankshaft a on the first mounting portion 1a, and an inclined sliding groove a2 is formed in the second semicircular clamping groove a1 towards the outer end; the inner circumferential surface of the mounting ring 7b is uniformly provided with first semicircular clamping grooves 7b1 along the axial direction; the second ring point contact type sealing part 7 further comprises a fixing pin 7d, and in an installation state, the fixing pin 7d is inserted into a round groove formed by the second semicircular clamping groove A1 and the first semicircular clamping groove 7b1 through an inclined sliding groove A2 along the axial direction.
The mounting ring 7b is inserted into the round groove formed by the second semicircular clamping groove A1 and the first semicircular clamping groove 7b1 through the fixing pin 7d, so that the mounting ring 7b is fixed relative to the crankshaft A, the mounting ring 7b cannot rotate axially relative to the crankshaft A, the stability of the device is improved, the oblique sliding groove A2 is convenient for inserting the second fixing ring 7a in an axial oblique mode, and the mounting and dismounting are convenient.
As shown in fig. 8, 9 and 10, the second annular point-contact sealing portion 7 further includes a second fixed slip ring 7e, the outer diameter of the second fixed slip ring 7e is smaller than the inner diameter of the second mounting portion 1b, the second fixed slip ring is coaxially disposed at the inner end of the second fixed ring 7a, and fourth semi-circular rings 7e1 slidably engaged with the inner circumferential surface of the second mounting portion 1b are axially disposed at equal intervals on the outer circumferential surface of the second fixed slip ring 7 e.
The second fixed slip ring 7e is coaxially arranged on the inner end face of the second fixed ring 7a, and fourth semi-circular rings 7e1 in sliding fit with the inner circumferential face of the second mounting portion 1b are axially and equidistantly arranged on the outer circumferential face of the second fixed slip ring 7e, so that when the crankshaft a rotates at a high speed, the sealing stability of the second sealing ring 7c is improved.
As shown in fig. 11, the end cap 2 is provided at its inner end surface with a step edge abutment ring 2a which abuts against the outer end surface of the fixing pin 7d, and the step edge abutment ring 2a is provided coaxially with the inner end surface of the step edge abutment ring 2a with a fifth semicircular ring 2a1 which abuts against the outer end surface of the second fixing ring 7 a.
The end cover 2 inner end face is provided with the ladder along the butt ring 2a coaxially to make the ladder along the butt ring 2a first end face butt on 2d0, prevent that 2d0 from breaking away from the collar 7b relatively, fifth semicircle ring 2a1 butt is at the second retainer plate 7a outer end face, make second ring point contact seal portion 7 and first ring point contact seal portion 6 butt closely laminate each other, thereby improve sealing stability.
The working principle of the invention is as follows:
the device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:
the method comprises the following steps: the end cover 2 is coaxially arranged on the end face of the support ring 1 through a sealing washer 8, and the crankshaft A is coaxially and rotatably arranged in the support ring 1 through a large bearing 3 and a small bearing 4 and penetrates through the end cover 2, so that the crankshaft A is ensured to stably and coaxially rotate relative to the support ring 1 and the end cover 2;
step two: the inner groove rubber ring 5a is coaxially clamped in the inner ring mounting groove 1c through the fixing ring 5b and the first clamping block 5b1, so that when the crankshaft A rotates, two ends of the groove part of the inner groove rubber ring 5a are elastically abutted against the circumferential surface of the crankshaft A, and the inner groove rubber ring 5a is static relative to the crankshaft A, so that the contact between the crankshaft A and the double-ring point contact type arc-shaped sealing part 5 is reduced, and the first mounting part 1a is ensured to be sealed relative to the second mounting part 1b, and a first sealing effect is formed;
step three: the first fixing ring 6a is coaxially welded inside the first mounting portion 1a, and the fixing pin 7d is coaxially inserted into the second semicircular clamping groove a1 and the first semicircular clamping groove 7b1 along the inclined sliding groove a2, so that the mounting ring 7b is fixedly connected with the crankshaft a, and the first sealing ring 6b and the second sealing ring 7c are respectively and fixedly arranged.
Step four: the first sealing ring 6b and the second sealing ring 7c are coaxially arranged on the second mounting part 1b and the crankshaft A through the first fixing ring 6a and the second fixing ring 7a respectively, the inner diameter of the first ring point contact type sealing part 6 is larger than the diameter of the crankshaft A, the outer diameter of the second ring point contact type sealing part 7 is smaller than the inner diameter of the second mounting part 1b, the sealing part ring point contact type sealing ring is relatively abutted against the opposite end face of the sealing part, so that when the crankshaft A rotates at a high speed, the first semicircular ring 6b2 and the third semicircular ring 7c2 are respectively abutted against the outer end face of the second sealing ring 7c and the inner end face of the first sealing ring 6b to rotate and rub, and therefore, the direct rubbing of the crankshaft A and the sealing part is avoided, the sealing of the second mounting part 1b and the outside air is ensured while the friction force is reduced, and a second sealing effect is formed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A shaft seal assembly for a compressor for sealingly and coaxially coupling a crankshaft (a) to the compressor, comprising:
the compressor comprises a support ring (1) and an end cover (2), wherein the support ring (1) is coaxially arranged at the end part of the compressor, the end cover (2) is coaxially arranged at the end part of the support ring (1) through a sealing gasket (8), a crankshaft (A) is coaxially and rotatably arranged in the support ring (1) and penetrates through the end cover (2), the support ring (1) is coaxially provided with a first installation part (1 a) and a second installation part (1 b) from inside to outside, a step edge is arranged between the first installation part (1 a) and the second installation part (1 b), and the inner diameter of the step edge is larger than the diameter of the crankshaft (A);
the bearing comprises a large bearing (3) and a small bearing (4), wherein the large bearing (3) is coaxially arranged at the end part of a first mounting part (1 a), the small bearing (4) is coaxially arranged at the outer end part of an end cover (2), and the inner ring of the large bearing (3) and the inner ring of the small bearing (4) are coaxially and fixedly connected with a crankshaft (A);
the double-ring point contact type arc-shaped sealing part (5) is coaxially arranged at the inner end part of the second mounting part (1 b), and double-point inner rings of the double-ring point contact type arc-shaped sealing part (5) are abutted against the circumferential surface of the crankshaft (A);
a first annular point contact type sealing part (6) and a second annular point contact type sealing part (7), wherein the first annular point contact type sealing part (6) is coaxially and fixedly arranged at the inner end part of the second mounting part (1 b), the outer ring of the ring point of the first ring point contact type sealing part (6) faces outwards, the inner diameter of the first ring point contact type sealing part (6) is larger than the diameter of the crankshaft (A), the second ring point contact type sealing part (7) is coaxially and fixedly arranged on the crankshaft (A), the inner ring of the annular point of the second annular point contact type sealing part (7) faces inwards, the outer diameter of the second annular point contact type sealing part (7) is smaller than the inner diameter of the second mounting part (1 b), the first annular point contact type sealing part (6) and the second annular point contact type sealing part (7) have different annular point inner diameters, and the first annular point contact type sealing part (6) and the second annular point contact type sealing part (7) are in annular point abutting ring abutting joint with the opposite end faces of the first annular point contact type sealing part and the second annular point contact type sealing part.
2. A shaft sealing device of a compressor according to claim 1, wherein an inner ring mounting groove (1 c) is coaxially provided on an inner circumferential surface of the second mounting portion (1 b); dicyclo point-contact arc sealing (5) are including interior slot rubber circle (5 a) and retainer plate (5 b), interior slot rubber circle (5 a) outer lane passes through retainer plate (5 b) coaxial fixed setting in inner ring mounting groove (1 c), interior slot rubber circle (5 a) slot part both ends internal diameter is less than spindle (A) diameter.
3. The shaft sealing device of a compressor as claimed in claim 2, wherein the fixing ring (5 b) has first engaging blocks (5 b 1) axially uniformly distributed on both end surfaces thereof, the inner ring mounting groove (1 c) has engaging ports (1 c 1) uniformly distributed on the end surface thereof for engaging with the first engaging blocks (5 b 1), and the fixing ring (5 b) is coaxially engaged in the inner ring mounting groove (1 c) via the first engaging blocks (5 b 1).
4. A shaft sealing apparatus of a compressor in accordance with claim 3, wherein both sides of an inlet end of the inner ring installation groove (1 c) are provided with inclined guide surfaces (1 c 2) for facilitating the engagement sliding of the first engaging piece (5 b 1).
5. A shaft seal device of a compressor according to claim 1, wherein the first ring point contact type seal portion (6) includes: the outer diameter of the first fixing ring (6 a) is larger than that of the crankshaft (A), the first fixing ring (6 a) is coaxially arranged in the second mounting part (1 b), the first fixing ring (6 a) is located at the outer end part of the double-ring point contact type arc sealing part (5), and second clamping blocks (6 a 1) are uniformly distributed on the outer end face of the first fixing ring (6 a) along the axial direction; first sealing washer (6 b), internal diameter are greater than spindle (A) diameter, and through interior terminal surface along the axial equipartition with the first joint groove (6 b 1) of second joint piece (6 a 1) gomphosis coaxial setting at first retainer plate (6 a) outer tip, first sealing washer (6 b) outer terminal surface still coaxial be provided with second ring point contact sealing portion (7) interior terminal surface butt first semicircle ring (6 b 2).
6. A shaft sealing device of a compressor according to claim 1, wherein the first ring point contact type sealing portion (6) further comprises a first stationary slip ring (6 c) having an outer diameter larger than that of the shaft (a) and coaxially disposed on an outer end surface of the first stationary slip ring (6 a), and a second half ring (6 c 1) slidably fitted to a circumferential surface of the shaft (a) is axially and equally spaced on an inner circumferential surface of the first stationary slip ring (6 c).
7. A shaft sealing device of a compressor according to claim 1, wherein the second annular point contact type sealing portion (7) includes: the outer diameter of the second fixing ring (7 a) is smaller than the inner diameter of the second mounting part (1 b), the outer end face of the second fixing ring is coaxially and fixedly arranged on the crankshaft (A) through a mounting ring (7 b), and third clamping blocks (7 a 1) are uniformly distributed on the inner end face of the second fixing ring (7 a) along the axial direction; and the outer diameter of the second sealing ring (7 c) is smaller than the inner diameter of the second mounting part (1 b), a second clamping groove (7 c 1) which is uniformly distributed along the axial direction and is embedded with a third clamping block (7 a 1) is coaxially arranged on the inner end surface of the second fixing ring (7 a), and a third semicircular ring (7 c 2) which is abutted against the outer end surface of the first ring point contact type sealing part (6) is coaxially arranged on the inner end surface of the second sealing ring (7 c).
8. The shaft sealing device of a compressor as claimed in claim 7, wherein a second semicircular catching groove (a 1) is axially formed on the outer circumferential surface of the crankshaft (a) at the first mounting portion (1 a), and the second semicircular catching groove (a 1) is provided with a slant sliding groove (a 2) toward the outer end; the inner circumferential surface of the mounting ring (7 b) is uniformly provided with first semicircular clamping grooves (7 b 1) along the axial direction; the second ring point contact type sealing part (7) further comprises a fixing pin (7 d), and in the installation state, the fixing pin (7 d) is inserted into a whole circular groove formed by the second semicircular clamping groove (A1) and the first semicircular clamping groove (7 b 1) through an inclined sliding groove (A2) along the axial direction.
9. The shaft sealing device of a compressor according to claim 7, wherein the second annular point contact type sealing portion (7) further comprises a second fixed slip ring (7 e), the outer diameter of the second fixed slip ring (7 e) is smaller than the inner diameter of the second mounting portion (1 b), the second fixed slip ring is coaxially arranged at the inner end of the second fixed ring (7 a), and a fourth semi-circular ring (7 e 1) which is in sliding fit with the inner circumferential surface of the second mounting portion (1 b) is axially arranged on the outer circumferential surface of the second fixed slip ring (7 e) at equal intervals.
10. A shaft sealing device of a compressor according to claim 8, characterized in that the inner end face of the end cover (2) is provided with a step edge abutting ring (2 a) abutting against the outer end face of the fixing pin (7 d), and the step edge is coaxially provided with a fifth semicircular ring (2 a 1) abutting against the outer end face of the second fixing ring (7 a) along the inner end face of the abutting ring (2 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616970.XA CN111895092B (en) | 2020-07-01 | 2020-07-01 | Shaft sealing device of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616970.XA CN111895092B (en) | 2020-07-01 | 2020-07-01 | Shaft sealing device of compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111895092A CN111895092A (en) | 2020-11-06 |
| CN111895092B true CN111895092B (en) | 2022-05-17 |
Family
ID=73191314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010616970.XA Active CN111895092B (en) | 2020-07-01 | 2020-07-01 | Shaft sealing device of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111895092B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH684170A5 (en) * | 1991-01-16 | 1994-07-29 | Gericke Ag | Device for supporting and sealing shafts in a mixer |
| WO2013042659A1 (en) * | 2011-09-22 | 2013-03-28 | 日本電気株式会社 | Shaft member sliding mechanism and shaft member sliding method |
| DE102013005677B3 (en) * | 2013-04-03 | 2014-07-17 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Shaft bearing with shaft seal, especially for water pumps in motor vehicles |
| DE102014001373A1 (en) * | 2014-02-04 | 2015-08-06 | Gv Engineering Gmbh | Vehicle axle assembly with integrated pressure medium line for tire filling |
| FR3018575B1 (en) * | 2014-03-12 | 2018-04-20 | Carl Freudenberg Kg | DOUBLE SEALING DEVICE FOR ROTARY SHAFT AND PUMP COMPRISING SUCH A DEVICE |
-
2020
- 2020-07-01 CN CN202010616970.XA patent/CN111895092B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111895092A (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7871254B2 (en) | Magnetic bearing and coupling device | |
| US6669203B1 (en) | Brush seal placement between rotating and stationary components with reversely bent leaf spring | |
| US20090315272A1 (en) | Brush seal device | |
| US20130177465A1 (en) | Compressor with compliant thrust bearing | |
| CN109779947A (en) | A kind of dynamic sealing device reused suitable for low-temperature and high-speed | |
| CN111895092B (en) | Shaft sealing device of compressor | |
| CN203453056U (en) | Scroll compressor with unloader assembly | |
| WO2018139543A1 (en) | Scroll compressor and assembly method thereof | |
| US5692756A (en) | Refrigeration compressor and compressor seal | |
| US9086152B2 (en) | Mechanical face seal | |
| CN206146629U (en) | High -speed oil blanket test device of high temperature | |
| CN206290437U (en) | The fully-closed vortex compressor of Elastic Contact sealing | |
| CN210715957U (en) | Labyrinth sealing device based on felt sealing ring | |
| JP5865960B2 (en) | Compressor | |
| CN109058463B (en) | Wear-resistant rotary shaft lip-shaped sealing ring device for forced convection heat exchange | |
| CN105909798A (en) | Dry gas seal for supercritical fluid equipment | |
| CN206290438U (en) | Scroll compressor with elastic cross coupling ring | |
| CN219840824U (en) | Mechanical sealing structure of particle-resistant water pump | |
| JP2000104834A (en) | Shaft seal structure by lip seal | |
| JP2006177500A (en) | Mechanical seal | |
| CN218094217U (en) | Shaft end sealing structure based on steam compressor | |
| CN219655254U (en) | Novel rotary shaft seal device | |
| KR930001979B1 (en) | Axis of rotation sealing device and vane type rotary compressor | |
| CN219159241U (en) | Corrosion-resistant and particle-resistant chemical pump sealing device | |
| JP6808510B2 (en) | Scroll compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220424 Address after: 414000 No. 2, Heping Road, rongjiawan Town, Yueyang County, Yueyang City, Hunan Province Applicant after: Hunan Shuanglong Technology Development Co.,Ltd. Address before: 400000 No.73 Xiahe street, Shilong Town, Banan District, Chongqing Applicant before: Tan Jinquan |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |