CN114718864A - Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber - Google Patents
Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber Download PDFInfo
- Publication number
- CN114718864A CN114718864A CN202210485724.4A CN202210485724A CN114718864A CN 114718864 A CN114718864 A CN 114718864A CN 202210485724 A CN202210485724 A CN 202210485724A CN 114718864 A CN114718864 A CN 114718864A
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- Prior art keywords
- oil
- bearing
- scroll plate
- seat
- movable
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0021—Systems for the equilibration of forces acting on the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/028—Means for improving or restricting lubricant flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a scroll compressor, which comprises a shell with an opening at one end, an eccentric main shaft, a bearing seat, a movable scroll plate, a static scroll plate seat, an air inlet, an air outlet, a low-pressure cavity, a high-pressure cavity, an oil-gas oil distribution cavity, a joint balance block, a ball bearing and a bearing pad, wherein a static scroll plate oil duct is arranged on the side surface of the static scroll plate, the static scroll plate oil duct enters from the oil-gas oil distribution cavity on one side surface of the static scroll plate through a filter screen and exits from a bearing pad oil inlet hole at the joint of one side surface of the static scroll plate and the bearing pad, a backpressure pressure valve is arranged in an oil return hole on the other side surface of the static scroll plate and is communicated with the low-pressure cavity, a medium-pressure cavity is arranged in a space between the bearing seat and the bearing pad and the ball bearing, and the movable scroll plate is internally provided with the movable scroll plate oil duct. The invention can solve the problems that the ball bearing of the existing compressor is poor in lubrication and easy to wear, and the back pressure valve spring is frequently opened and easy to damage.
Description
Technical Field
The invention relates to the technical field of manufacturing of compressor accessories, in particular to a positive displacement spiral fluid compressor.
Background
The existing volume type scroll fluid compressor, as shown in fig. 1 and fig. 2, comprises a casing 1 with an opening at one end, a non-opening end in the casing is provided with an eccentric main shaft 3, the eccentric main shaft 3 is connected with a movable scroll 8 through a bearing 4 and a bearing seat 5, the movable scroll 8 is meshed with a fixed scroll 9 to realize fluid suction, compression and discharge, the fixed scroll 9 is provided with a fixed scroll seat 10 at the opening end of the casing to close with the casing 1, the non-opening end of the casing 1 is provided with an air inlet 2, the fixed scroll seat 10 is provided with an air outlet 14, the space between the fixed scroll 9 and the movable scroll 8, the fixed scroll seat 10 and the air inlet 2 of the motor casing is a low pressure cavity 15, the space between the air outlet on the fixed scroll 9 and the air outlet on the fixed scroll seat 10 is a high pressure cavity 16, and the space between the fixed scroll 9 and the fixed scroll seat 10, which is communicated with the oil inlet channel 17, forms an oil-gas oil distribution cavity 18, the eccentric main shaft is arranged between a bearing 4 and a bearing seat 5 and a movable scroll plate 8 and is combined with the movable scroll plate through a joint balance block 6 and a ball bearing 7, the edge of the ball bearing 7 and the position between the movable scroll plate 8 and a fixed scroll plate 9 and the bearing seat 5 are provided with a bearing pad 11, the fixed scroll plate 9 is provided with a fixed disc oil duct 9-1, the fixed disc oil duct 9-1 enters from an oil-gas oil distribution cavity 18 on one surface of the fixed scroll plate through a filter screen 12 and exits from a bearing pad oil inlet hole 11-1 at the joint of the other surface of the fixed scroll plate and the bearing pad 11, a throttle pin 9-2 is arranged in the fixed disc oil duct 9-1, lubricating oil flows to a space between the bearing 4 and the bearing seat 7 through a gap between the bearing pad 11 and the bearing seat 5 after passing through the bearing pad 11 from an outlet of the fixed disc oil duct 9-1, namely, a medium pressure back pressure cavity 19 is communicated with an oil hole of the fixed scroll plate 9 and the bearing pad oil inlet hole 11-1, lubricating oil lubricates ball bearing 7, in order to reduce because of ball bearing 7 and the 6 wearing and tearing that produce the friction and arouse of joint balancing piece, because form sealed space between joint balancing piece 6 and the vortex dish 8 that moves, there is not big pressure differential around the ball bearing 7, therefore lubricating oil hardly gets into in the ball bearing 7, the inside oil deficiency or even oil-free lubrication of taking place very easily of ball bearing, ball bearing 7 is in the 8 backs of the vortex dish that moves at high-pressure exhaust middle part simultaneously, the fluid can be very high through high-pressure compression exhaust temperature, also can lead to the ball bearing high temperature, therefore break down.
In addition, the exhaust hole on the back of the static vortex disk 9 is communicated with the exhaust port 14 of the high pressure cavity, the edge of the static vortex disk 9 and the bearing pad 11 is provided with an air inlet hole of which the high pressure cavity is communicated with the medium pressure back pressure cavity 19 of the bearing seat 5, the other side of the static vortex disk 9 and the bearing pad 7 is provided with an oil return hole communicated with the medium pressure back pressure cavity 19 of the bearing seat, a back pressure valve 20 is arranged in the oil return hole and communicated with the low pressure cavity 15, so that the movable vortex disk 8 floats, the floating movable vortex disk 8 performs plane motion in the static vortex disk 9, the back pressure valve 20 plays a role of ensuring the pressure of the medium pressure back pressure cavity 19 of the bearing seat, the back pressure valve 20 sets the opening pressure by a spring to ensure that the medium pressure cavity pressure meets the design requirement when the compressor works, thereby realizing the floating of the movable vortex disk 8, since the back pressure valve is opened frequently, the spring is easily damaged too many times, and thus malfunctions.
Disclosure of Invention
The invention aims to solve the problems that a ball bearing of an existing compressor is poor in lubrication and easy to wear, and a back pressure valve spring is opened frequently and easily damaged.
In order to solve the problems, the technical scheme of the invention is as follows: the scroll compressor comprises a shell with an opening at one end, wherein an eccentric main shaft is arranged at a non-opening end in the shell, the eccentric main shaft is connected with a movable scroll plate through a bearing and a bearing seat, the movable scroll plate is meshed with a fixed scroll plate, the fixed scroll plate is positioned at one end of the opening of the shell and is provided with a fixed disc seat which is closed with the shell, one end of the non-opening end of the shell is provided with an air inlet, a low-pressure cavity and a high-pressure cavity, a space communicated with an oil inlet channel between the fixed scroll plate and the fixed disc seat forms an oil-gas oil separating cavity, the eccentric main shaft is combined with the movable scroll plate through a joint balance block and a ball bearing between the bearing and the fixed scroll plate and the movable scroll plate, the edge of the ball bearing is provided with a bearing pad between the movable scroll plate and the fixed scroll plate and the bearing seat, a fixed disc oil duct is arranged on the fixed scroll plate, and enters from the oil-gas oil separating cavity on one surface of the fixed scroll plate through a filter screen and enters from the fixed scroll plate One side with the bearing pad inlet port of bearing pad junction goes out, be equipped with the throttle round pin in the quiet dish oil duct, in the bearing frame with the bearing pad reaches space between the ball bearing is the middling pressure chamber of backing a pressure, it is equipped with the movable disk oil duct to move in the vortex dish, the movable disk oil duct is followed the bearing pad with space between the bearing frame passes through move the vortex dish with the bearing pad outlet port of bearing pad junction gets into and follows move the vortex dish with the ball bearing junction goes out.
In the above technical solution, a more specific solution may be: the oil-saving bearing is characterized in that bosses extending towards the movable scroll plate are arranged on the inner edge and the outer edge of the bottom ring of the bearing seat, a T-shaped oil groove is arranged between the inner edge and the outer edge of the bottom ring of the bearing seat, the T-shaped oil groove comprises a transverse long oil hole and a longitudinal oil groove, and the shape of the oil outlet of the bearing pad is consistent with that of the transverse long oil hole of the T-shaped oil groove of the bearing seat.
And further: the transverse long hole of the T-shaped oil groove of the bearing seat and the oil outlet hole of the bearing pad are circular long holes.
Further: the transverse long hole of the T-shaped oil groove of the bearing seat and the oil outlet hole of the bearing pad are rectangular holes.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. according to the scroll compressor, the movable disc oil duct is established in the movable scroll disc, when the movable scroll disc rotates for a circle by taking the eccentricity of the shaft head as a radius, the bearing pad oil outlet is communicated with the movable disc oil duct for one time, so that lubricating oil which flows out from the oil-gas distribution cavity through the bearing pad oil inlet of the static disc oil duct enters the movable disc oil duct through the bearing seat T-shaped oil groove and the bearing pad oil inlet, and directly flows out of the lubricating ball bearing from the joint of the movable scroll disc and the ball bearing, so that the effect of lubricating the ball bearing or involving partial oil pressure is achieved, the ball bearing is fully lubricated and cooled, and the service life of the ball bearing is prolonged;
2. the scroll compressor has the advantages that the lubricating ball bearing flows out from the joint of the oil-gas oil separating cavity and the driven scroll directly by changing the oil way, so that the floating pressure balance of the driven scroll is ensured by one-time oil wading in one circle of the translation of the driven scroll, the pressure of a middle pressure cavity is balanced without opening a spring in a back pressure valve, the back pressure valve can be omitted, and the failure probability of the whole compressor is reduced.
Drawings
FIG. 1 is a front view of the prior art;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a front view of an embodiment of the present invention;
FIG. 4 is an enlarged view at B in FIG. 2;
FIG. 5 is a cross-sectional view of a orbiting scroll according to an embodiment of the present invention;
FIG. 6 is a front view of a orbiting scroll of an embodiment of the present invention;
FIG. 7 is a front view of a bearing housing of an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a bearing housing of an embodiment of the present invention;
fig. 9 is a front view of a bearing pad of an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in further detail with reference to the accompanying drawings:
the scroll compressor as shown in fig. 1 to 9 includes a casing 1 with an opening at one end, an eccentric main shaft 3 is provided at the non-opening end in the casing, the eccentric main shaft 3 is connected with a movable scroll 8 through a bearing 4 and a bearing seat 5, the movable scroll 8 is engaged with a fixed scroll 9 to realize the suction, compression and discharge of fluid, the fixed scroll 9 is provided with a fixed scroll seat 10 at the opening end of the casing to be closed with the casing 1, the non-opening end of the casing 1 is provided with an air inlet 2, the fixed scroll seat 10 is provided with an air outlet 14, the fixed scroll 9 is provided with a line end, the movable scroll 8, the space where the fixed scroll seat 10 is communicated with the air inlet 2 of the motor casing is a low pressure cavity 15, the space where the air outlet on the fixed scroll 9 is communicated with the air outlet on the fixed scroll seat 10 is a high pressure cavity 16, the space where the fixed scroll 9 is communicated with the fixed scroll seat 10 with an oil inlet channel 17 forms an oil-gas distribution 18, and the eccentric main shaft is provided between the bearing cavity 3, the bearing 4 and the movable scroll 8 through a joint balance block 6 and 7 and a ball bearing block 7 The movable scroll plate is combined, a bearing pad 11 is arranged between the edge of the ball bearing 7, the movable scroll plate 8, the fixed scroll plate 9 and the bearing seat 5, a fixed scroll plate oil duct 9-1 is formed in the fixed scroll plate 9, the fixed scroll plate oil duct 9-1 enters from an oil-gas oil distribution cavity 18 on one surface of the fixed scroll plate through a filter screen 12 and exits from a bearing pad oil inlet hole 11-1 at the joint of the other surface of the fixed scroll plate and the bearing pad 11, a throttling pin 9-2 is arranged in the fixed scroll plate oil duct 9-1, and a space between the bearing pad 11 and the ball bearing 7 in the bearing seat 5 is a medium-pressure back-pressure cavity 19.
The movable scroll 8 is internally provided with a movable disc oil duct 8-1, the movable disc oil duct 8-1 enters from a gap between the bearing pad 11 and the bearing seat 5 through a bearing pad oil outlet hole 11-2 at the joint of the movable scroll 8 and the bearing pad 11 and exits from the joint of the movable scroll 8 and the ball bearing 7, and the joint is directly connected to an oil inlet groove of the ball bearing 7.
Bosses 5-2 extending towards the movable scroll are arranged on the inner edge and the outer edge of a bottom ring of the bearing seat 5, a T-shaped oil groove 5-1 is arranged between the inner edge and the outer edge of the bottom ring of the bearing seat 5 and comprises a transverse long oil hole and a longitudinal oil groove, the shape of an oil outlet hole 11-2 of the bearing pad 11 is consistent with that of the transverse long oil hole of the T-shaped oil groove 5-1 of the bearing seat, and the transverse long hole of the T-shaped oil groove 5-1 of the bearing seat and the oil outlet hole 11-2 of the bearing pad are circular long holes. The movable oil duct 8-1 of the movable scroll 8 comprises a branch oil duct 8-1-1 which is connected with a bearing seat T-shaped oil groove and is arranged along the axial direction of the movable scroll, the edge of the driven scroll 8 is inwards arranged along the radial direction and is connected with the branch oil duct 8-1-1 and then extends to a main oil duct 8-1-2 at the two ends of the ball bearing 7, and the main oil duct 8-1-2 is sealed and blocked at the hole at the edge of the movable scroll 8 through a cylindrical pin 8-2, so that the lubricating oil coming from the branch oil duct 8-1-1 cannot flow off from the edge of the movable scroll.
According to the scroll compressor, the boss 5-2 is arranged at the edge of the bottom ring of the bearing seat to block most of lubricating oil which is led to the medium-pressure back pressure cavity 19, the movable disc oil duct 8-1 is established in the movable scroll disc 8, when the movable scroll disc rotates for a circle by taking the eccentricity of the shaft head as a radius, the bearing pad oil outlet is communicated with the movable disc oil duct for one time, so that the lubricating oil which flows out from the oil-gas oil distribution cavity 18 through the static disc oil duct 9-1 and the bearing pad oil inlet 11-1 enters the movable disc oil duct 8-1 through the T-shaped oil groove 5-1 and the bearing pad oil inlet 11-2 of the bearing seat, and directly flows out of the lubricating ball bearing 7 from the joint of the movable scroll disc 8 and the ball bearing 7, so that the ball bearing 7 is fully lubricated and cooled, and the service life of the ball bearing is prolonged; by changing an oil way, the lubricating ball bearing 7 directly flows out of the joint of the driven scroll 8 and the ball bearing 7 from the oil-gas oil separating cavity 18, so that one-time oil involvement is carried out once in the translation of the movable scroll 8 to ensure the floating pressure balance of the movable scroll 8, the pressure of the middle pressure cavity 19 is balanced without opening a spring in the back pressure valve 20, the back pressure valve 20 can be omitted, and the failure probability of the whole machine is reduced.
In other embodiments, the horizontal slot hole of bearing frame T shape oil groove and the oil outlet of bearing pad can be rectangular hole to the needs that are fit for different operating modes.
Claims (4)
1. A scroll compressor comprises a casing with an opening at one end, wherein an eccentric main shaft is arranged at a non-opening end in the casing, the eccentric main shaft is connected with a movable scroll plate through a bearing and a bearing seat, the movable scroll plate is meshed with a fixed scroll plate, a fixed disc seat is arranged at one end, positioned at the opening of the casing, of the fixed scroll plate and is closed to the casing, an air inlet is arranged at one non-opening end of the casing, an air outlet, a low-pressure cavity and a high-pressure cavity are arranged on the fixed disc seat, an oil-gas oil separating cavity is formed in a space communicated with an oil inlet channel between the fixed scroll plate and the fixed disc seat, the eccentric main shaft is combined with the movable scroll plate through a joint balancing block and a ball bearing between the bearing and the movable scroll plate and the bearing seat, a bearing pad is arranged at a position between the edge of the ball bearing and the movable scroll plate and the fixed scroll plate and the bearing seat, and a static scroll plate oil channel is arranged on the fixed scroll plate, the static disc oil duct enters from the oil-gas separating cavity on one surface of the static scroll disc through a filter screen and exits from the oil inlet hole of the bearing pad at the joint of the other surface of the static scroll disc and the bearing pad, a throttle pin is arranged in the static disc oil duct, a space between the bearing pad and the ball bearing in the bearing seat is a medium-pressure back-pressure cavity,
the method is characterized in that: and a movable oil duct is arranged in the movable scroll plate, and the movable oil duct enters from a gap between the bearing pad and the bearing seat through a bearing pad oil outlet at the joint of the movable scroll plate and the bearing pad and then exits from the joint of the movable scroll plate and the ball bearing.
2. The scroll compressor of claim 1, wherein: the oil-saving bearing is characterized in that bosses extending towards the movable scroll plate are arranged on the inner edge and the outer edge of the bottom ring of the bearing seat, a T-shaped oil groove is arranged between the inner edge and the outer edge of the bottom ring of the bearing seat, the T-shaped oil groove comprises a transverse long oil hole and a longitudinal oil groove, and the shape of the oil outlet of the bearing pad is consistent with that of the transverse long oil hole of the T-shaped oil groove of the bearing seat.
3. The scroll compressor of claim 2, wherein: the transverse long hole of the T-shaped oil groove of the bearing seat and the oil outlet hole of the bearing pad are round long holes.
4. The scroll compressor of claim 2, wherein: the transverse long hole of the T-shaped oil groove of the bearing seat and the oil outlet hole of the bearing pad are rectangular holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485724.4A CN114718864A (en) | 2022-05-06 | 2022-05-06 | Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485724.4A CN114718864A (en) | 2022-05-06 | 2022-05-06 | Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114718864A true CN114718864A (en) | 2022-07-08 |
Family
ID=82231173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210485724.4A Pending CN114718864A (en) | 2022-05-06 | 2022-05-06 | Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114718864A (en) |
-
2022
- 2022-05-06 CN CN202210485724.4A patent/CN114718864A/en active Pending
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