CN112065716A

CN112065716A - Double-extension-shaft horizontal scroll refrigerating compressor

Info

Publication number: CN112065716A
Application number: CN202010967800.6A
Authority: CN
Inventors: 周晓亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-12-11
Anticipated expiration: 2040-09-15
Also published as: CN112065716B

Abstract

The invention discloses a double-extension-shaft horizontal scroll refrigeration compressor with low cost and high performance. And moving the gravity center of the movable scroll to the axis of the movable scroll, wherein the gravity center of the movable scroll is opposite to the motor shaft bearing. Balance blocks are respectively sleeved at two ends of the motor shaft; each steel ball is arranged in a separate anti-rotation ball socket; a cooling copper pipe is arranged on the shell and is filled with a cooling medium; the bottom of the high-pressure cavity is provided with lubricating oil, the air inlet pipe is provided with an oil spray head, and the oil spray head absorbs the lubricating oil at the bottom of the high-pressure cavity through a high-pressure oil pipe. The invention skillfully utilizes the dynamic balancing machine to solve the dynamic balance of the dynamic vortex plate and the whole machine. The bottom of the steel ball socket for preventing the vortex plate from rotating is changed into a middle bulge, so that the steel ball is prevented from falling and being clamped. The lubricating oil is conveyed to each part needing to be lubricated by utilizing the high pressure of the high pressure cavity, and meanwhile, the refrigerant vapor after absorbing heat is evaporated again to cool the motor and the whole machine, so that the normal operation of the compressor is ensured; the whole machine is simpler and more compact to manufacture, and the effects of energy conservation and emission reduction are achieved.

Description

Double-extension-shaft horizontal scroll refrigerating compressor

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a double-extension-shaft horizontal scroll refrigeration compressor with low cost and high performance.

Background

At present, only 1.5-15KW scroll refrigeration compressors are available in domestic and foreign markets and are vertical. The horizontal scroll refrigeration compressor with the power more than 15kw, especially, has the problem that the machine cannot run because the dynamic balance of the whole machine cannot be realized without vibration and low noise. The problem that the steel ball cannot be positioned accurately to cause the steel ball to be stuck and the problem that the whole machine is lubricated by the steel ball socket for preventing the rotation of the movable scroll, and the problem that one motor drives two sets of scroll compressors to cause the motor to be heated and burnt are also solved so far.

Disclosure of Invention

In order to solve the technical problems of dynamic balance, steel ball blocking, lubrication and motor cooling, the invention provides a double-extension-shaft horizontal scroll refrigeration compressor.

The invention is realized by the following technical scheme: a double-extension-shaft horizontal scroll refrigeration compressor comprises a cylindrical shell, wherein a motor stator is fixed in the middle of the inner wall of the shell, a motor shaft is installed in the center of the motor stator, and a rotor matched with the motor stator is fixed on the motor shaft; two ends of the motor shaft are rotatably arranged on the bracket on the inner wall of the shell through bearings, and two ends of the motor shaft are provided with eccentric shaft heads; an eccentric shaft head of the motor shaft is rotatably provided with a movable scroll through another bearing; the outer side surface of the movable scroll plate is provided with a fixed scroll plate in a matching way, and a plurality of steel balls are arranged between the inner side surface of the periphery of the movable scroll plate and the bracket of the shell; the fixed scroll is fixed with the shell, a high-pressure valve plate is arranged outside a central hole of the fixed scroll, and a sealing cover sealed at the end part of the shell is arranged outside the fixed scroll; a low-pressure cavity is arranged between the movable vortex disc and the fixed vortex disc, and a high-pressure cavity is arranged between the fixed vortex disc and the sealing cover; the shell is connected with an air inlet pipe communicated with the low pressure cavity and an air outlet pipe communicated with the high pressure cavity;

balance blocks are respectively sleeved at two ends of the motor shaft;

each steel ball is arranged in a separate anti-rotation ball socket;

a cooling copper pipe is arranged on the shell, one end of the cooling copper pipe is used for introducing a cooling medium, and the other end of the cooling copper pipe is connected with an air inlet pipe;

and lubricating oil is arranged at the bottom of the high-pressure cavity, an oil spray head is arranged at the air inlet pipe, and the oil spray head absorbs the lubricating oil at the bottom of the high-pressure cavity through a high-pressure oil pipe.

It further comprises the following steps: the movable scroll plate adjusts the gravity center of the movable scroll plate to the axis of the movable scroll plate by reducing the mass and increasing the mass; the gravity center of the movable scroll plate is opposite to the bearing on the eccentric shaft head of the motor shaft in the radial direction.

The anti-rotation ball sockets are uniformly distributed around the axis of the movable scroll plate; the anti-rotation ball socket is in a ring shape, the middle position of the anti-rotation ball socket is raised, and the anti-rotation ball socket is composed of annular grooves which are respectively arranged on the inner side surface of the movable scroll plate and the outer side surface of the bracket.

The cooling copper pipe is arranged in the shell in a penetrating mode.

Lubricating oil is arranged at the bottom of the low-pressure cavity, and the bottom of the low-pressure cavity is communicated with the bottom of the high-pressure cavity through a through hole formed in the fixed scroll; a check valve is arranged on the through hole of the fixed scroll; the filter screen is installed to high pressure chamber bottom, and lubricating oil is located the filter screen below.

The double-extension-shaft horizontal scroll refrigeration compressor is more compact and simple in structure, can be produced in large scale, and can save energy and reduce emission. The invention has the following technical effects:

1, by improving the balance of the movable scroll plate, a balance block is added, so that the whole machine operates stably, and the noise is reduced;

2, conveying the lubricating oil at the bottom of the high-pressure cavity to an oil spray head through a high-pressure oil pipe by using the pressure of the high-pressure cavity, and enabling the sprayed lubricating oil to enter parts needing to be lubricated; meanwhile, lubricating oil at the bottom of the low-pressure cavity can be introduced into the high-pressure cavity through the check valve to supplement the shortage of the lubricating oil in the high-pressure cavity;

3, refrigerant vapor absorbing heat and evaporating from the evaporator firstly enters a cooling copper pipe in the shell to cool the shell and internal parts, and then enters the movable scroll and the fixed scroll to be compressed, so that the heating problem of the motor is solved;

4, the steel ball has the protruding anti-rotation ball socket in the middle alone, and the steel ball only rotates along the track of the ball socket of individual anti-rotation, has avoided the steel ball to fall the card because of gravity and die and make the unable problem of operation of complete machine.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of a movable scroll plate with an anti-rotation ball socket;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a front view of the housing with the cooling copper tubes mounted thereon;

FIG. 5 is a view from A-A in FIG. 4;

FIG. 6 is a front view of the fixed scroll adjusting center of gravity;

FIG. 7 is a right side view of the fixed scroll adjusting center of gravity;

in the figure: 1. a high-pressure valve plate; 2. a high pressure chamber; 3. an exhaust pipe; 4. a fixed scroll; 5. an air inlet pipe; 6. an oil spray head; 7. a movable scroll; 8. the anti-rotation ball socket; 9. a steel ball; 10. a housing; 10-1, a bracket; 11. a bearing; 12. a motor shaft; 13. cooling the copper pipe; 14. a motor stator; 15. a high pressure oil pipe; 16. lubricating oil; 17. filtering with a screen; 18. a counterbalance; 19. a one-way valve; 20. mass reduction; 21. the mass is increased; 22. sealing the cover; 23. a low pressure chamber.

Detailed Description

The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.

Referring to fig. 1, a double-extension-shaft horizontal scroll refrigeration compressor includes a cylindrical casing 10, a motor stator 14 is fixed in the middle of the inner wall of the casing 10, a motor shaft 12 is installed in the center of the motor stator 14, and a rotor matched with the motor stator 14 is fixed on the motor shaft 12. Two ends of a motor shaft 12 are rotatably arranged on a bracket 10-1 on the inner wall of the shell 10 through bearings 11, and two ends of the motor shaft 12 are eccentric shaft heads. An eccentric shaft head of a motor shaft 12 is rotatably provided with a movable scroll plate 7 through another bearing 11; the outer side surface of the movable scroll plate 7 is provided with the fixed scroll plate 4 in a matching way, and a plurality of steel balls 9 are arranged between the inner side surface of the periphery of the movable scroll plate 7 and the bracket 10-1 of the machine shell 10. The fixed scroll 4 is fixed with the casing 10, a high-pressure valve plate 1 is arranged outside a central hole of the fixed scroll 4, and a sealing cover 22 sealed at the end part of the casing 10 is arranged outside the fixed scroll 4. A low-pressure cavity 23 is formed between the movable scroll 7 and the fixed scroll 4, and a high-pressure cavity 2 is formed between the fixed scroll 4 and the sealing cover 22. An intake pipe 5 communicating with the low pressure chamber 23 and an exhaust pipe 3 communicating with the high pressure chamber 2 are connected to the casing 10.

The present embodiment mainly improves the following points:

referring to fig. 6 and 7, the center of gravity of orbiting scroll 7 is adjusted to the axial center of orbiting scroll 7 by reducing mass 20 and increasing mass 21 at a predetermined position on the back surface of orbiting scroll 7, which is a primary balance. In addition, when the movable scroll 7 is designed, the center of gravity thereof is opposed to the eccentric shaft head upper bearing 11 of the motor shaft 12 in the radial direction, and the overturning force and the overturning moment of the movable scroll 7 to the bearing 11 are reduced as much as possible. After the balance is finished, performing secondary balance on the whole machine: balance weights 18 are sleeved at the shaft heads at the two ends of the motor shaft 12 and opposite to the mass and the rotating inertia force of the movable scroll 7. As shown in figure 1, through the two-time balance, the stable operation of the whole machine is ensured, and the vibration and the noise are reduced.

The present embodiment mainly improves the point two:

referring to fig. 2 and 3, the anti-rotation ball sockets 8 are uniformly distributed around the axis of the movable scroll 7, each anti-rotation ball socket 8 is composed of annular grooves respectively formed in the inner side surface of the movable scroll 7 and the outer side surface of the bracket 10-1, and each anti-rotation ball socket 8 is independently provided with a steel ball 9. The middle of the autorotation preventing ball socket 8 is in a convex shape, so that the steel ball 9 can only rotate along the round tracks at the periphery and can not fall down and be clamped.

The present embodiment mainly improves the point three:

the cooling copper pipe 13 is arranged in the machine shell 10 in a penetrating way, one end of the cooling copper pipe 13 is used for introducing a cooling medium, and the other end of the cooling copper pipe 13 is connected with the air inlet pipe 5. The invention is that two ends of a motor drive a pair of compression parts respectively, which causes the motor to be easy to be burnt out due to overload and heat; the cooling copper pipe 13 is cast in the wall of the shell 10 or wound outside the stator; refrigerant vapor absorbing heat and evaporating from the evaporator firstly enters the cooling copper pipe in the shell to be evaporated again, absorbs the heat of the shell and internal parts, and then enters the movable vortex disc and the fixed vortex disc to be compressed, so that the motor and the whole machine are cooled, and the normal operation of the whole machine is ensured.

The present embodiment mainly improves the point four:

as shown in fig. 1, the lubricating oil 16 is provided at the bottom of the low pressure chamber 23 and the bottom of the high pressure chamber 2, and the bottom of the low pressure chamber 23 is communicated with the bottom of the high pressure chamber 2 through a through hole provided in the fixed scroll 4; a check valve 19 is arranged on the through hole of the fixed scroll 4; the bottom of the high-pressure cavity 2 and the low-pressure cavity 23 is provided with a filter screen 17, and the lubricating oil 16 is positioned below the filter screen 17. And an oil spray head 6 is arranged at the air inlet pipe 5, and the oil spray head 6 sucks lubricating oil 16 at the bottom of the high-pressure cavity 2 through a high-pressure oil pipe 15.

The two ends of the motor respectively drive the pair of compression parts, so that the lubricating oil at the bottom of the compressor cannot be sucked into parts needing to be lubricated in a lubricating machine by using a central hole of the motor shaft of a single-head vertical compressor, and a low-pressure cavity cannot be changed into a high-pressure cavity to press the lubricating oil to a part needing to be lubricated by using pressure difference, and the high-pressure cavity can increase the internal temperature of the compressor, so that the refrigerant and the lubricating oil deteriorate. Therefore, the invention leads high pressure to two ends of the machine shell 10, the motor is still at low pressure, the lubricating oil at the bottom of the high pressure cavity is conveyed to the oil spray head by the pressure of the high pressure cavity through the high pressure oil pipe, and the lubricating oil sprayed by the oil spray head enters the movable vortex disc, the fixed vortex disc, the bearing and the like for lubrication. And meanwhile, after the whole machine stops and the pressure of the high-pressure cavity and the low-pressure cavity is balanced, the one-way valve is opened, so that the lubricating oil at the bottom of the low-pressure cavity can enter the bottom of the high-pressure cavity to supplement the shortage of the lubricating oil in the high-pressure cavity.

Claims

1. A double-extension-shaft horizontal scroll type refrigeration compressor,

the method is characterized in that:

the motor comprises a cylindrical shell (10), wherein a motor stator (14) is fixed in the middle of the inner wall of the shell (10), a motor shaft (12) is installed in the center of the motor stator (14), and a rotor matched with the motor stator (14) is fixed on the motor shaft (12); two ends of the motor shaft (12) are rotatably arranged on a bracket (10-1) on the inner wall of the shell (10) through bearings (11), and two ends of the motor shaft (12) are eccentric shaft heads; an eccentric shaft head of the motor shaft (12) is rotatably provided with a movable scroll (7) through another bearing (11); the outer side surface of the movable scroll (7) is provided with a fixed scroll (4) in a matching way, and a plurality of steel balls (9) are arranged between the inner side surface of the periphery of the movable scroll (7) and a bracket (10-1) of the casing (10); the fixed scroll (4) is fixed with the shell (10), a high-pressure valve plate (1) is arranged outside a central hole of the fixed scroll (4), and a sealing cover (22) sealed at the end part of the shell (10) is arranged on the outer side of the fixed scroll (4); a low-pressure cavity (23) is arranged between the movable scroll (7) and the fixed scroll (4), and a high-pressure cavity (2) is arranged between the fixed scroll (4) and the sealing cover (22); the shell (10) is connected with an air inlet pipe (5) communicated with the low-pressure cavity (23) and an air outlet pipe (3) communicated with the high-pressure cavity (2);

balance blocks (18) are respectively sleeved at two ends of the motor shaft (12);

each steel ball (9) is arranged in a separate anti-rotation ball socket (8);

a cooling copper pipe (13) is arranged on the shell (10), one end of the cooling copper pipe (13) is used for introducing a cooling medium, and the other end of the cooling copper pipe (13) is connected with the air inlet pipe (5);

the lubricating oil injection device is characterized in that lubricating oil (16) is arranged at the bottom of the high-pressure cavity (2), an oil injection head (6) is arranged at the air inlet pipe (5), and the lubricating oil (16) at the bottom of the high-pressure cavity (2) is absorbed by the oil injection head (6) through a high-pressure oil pipe (15).

2. The double-extension-shaft horizontal scroll-type refrigeration compressor as claimed in claim 1, wherein: the movable scroll (7) is provided with a mass (20) and a mass (21) which are reduced and increased to adjust the gravity center of the movable scroll (7) to the axis of the movable scroll (7); the gravity center of the movable scroll (7) is opposite to the eccentric shaft head upper bearing (11) of the motor shaft (12) in the radial direction.

3. The double-extension-shaft horizontal scroll-type refrigeration compressor as claimed in claim 1, wherein: the anti-rotation ball sockets (8) are multiple in number, and the anti-rotation ball sockets (8) are uniformly distributed around the axis of the movable scroll (7); the anti-rotation ball socket (8) is annular, the middle position of the anti-rotation ball socket (8) is raised, and the anti-rotation ball socket (8) is composed of annular grooves which are respectively arranged on the inner side surface of the movable scroll (7) and the outer side surface of the bracket (10-1).

4. The double-extension-shaft horizontal scroll-type refrigeration compressor as claimed in claim 1, wherein: the cooling copper pipe (13) penetrates through the shell (10).

5. The double-extension-shaft horizontal scroll-type refrigeration compressor as claimed in claim 1, wherein: lubricating oil (16) is arranged at the bottom of the low-pressure cavity (23), and the bottom of the low-pressure cavity (23) is communicated with the bottom of the high-pressure cavity (2) through a through hole formed in the fixed scroll (4); a check valve (19) is arranged on the through hole of the fixed scroll (4); a filter screen (17) is installed at the bottom of the high-pressure cavity (2), and lubricating oil (16) is located below the filter screen (17).