CN219327627U

CN219327627U - Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Info

Publication number: CN219327627U
Application number: CN202223598647.8U
Authority: CN
Inventors: 孙玉松; 迈克尔·布龙; 刘三祥; 劳雷·弗洛里蒙德
Original assignee: Danfoss Tianjin Ltd
Current assignee: Danfoss Tianjin Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-11
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a scroll compressor. The scroll compressor includes: a scroll compressor housing; a fixed scroll fixed in the scroll compressor housing; a housing mounted within the scroll compressor housing; an orbiting scroll rotatably supported on the frame and engaged with the fixed scroll; and the actuating mechanism is fixed at the lower end of the scroll compressor and is connected with the movable scroll to drive the movable scroll to rotate. The scroll compressor also includes a rotation prevention mechanism for preventing rotation of the non-orbiting scroll, the rotation prevention mechanism including at least one blind cavity. By providing at least one blind cavity, the amount of relatively expensive material and the weight of the part can be reduced.

Description

Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a scroll compressor.

Background

Compressors can be classified into reciprocating compressors, scroll compressors (or scroll compressors), centrifugal compressors, and vane compressors.

Typically, the working principle of a scroll compressor is to compress gas by rotating an orbiting scroll around the base center of a fixed scroll and gradually reducing the volume of a gas compression chamber formed by the engagement of the orbiting and fixed scrolls. Wherein the orbiting scroll is directly supported to a frame fixed in the compressor housing. In addition, one end (upper end) of a crankshaft for driving the orbiting scroll to rotate is connected to the orbiting scroll through a central hole in a frame, and the other end (lower end) is directly supported to a lower support frame fixed in a compressor housing, so that when the crankshaft rotates in a clockwise or counterclockwise direction, corresponding suction, compression and discharge operations can be performed. Wherein the compressed gas is discharged through a discharge valve into the high pressure chamber of the scroll compressor and finally discharged through a discharge port.

Disclosure of Invention

The present utility model is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.

According to one aspect of the present utility model, there is provided a scroll compressor comprising:

-a scroll compressor housing;

-a non-orbiting scroll fixed within the scroll compressor housing;

-a housing mounted within the scroll compressor housing;

-an orbiting scroll rotatably supported on the frame and engaged with the fixed scroll;

an actuating mechanism fixed at the lower end of the scroll compressor and connected to the movable scroll to drive the movable scroll to rotate,

-a rotation preventing mechanism for preventing rotation of the non-orbiting scroll, comprising:

a rotation preventing pin provided to protrude outward from the main body of the housing,

a receiving hole provided at a side of the frame facing the bottom of the movable scroll and opposite to a scroll line on the movable scroll,

and a restricting member accommodated in the accommodation hole and including a pin sliding hole engaged with the rotation preventing pin, and at least one blind cavity provided on the body of the restricting member and spaced apart from the pin sliding hole.

In one example, the limiting member further includes a pair of sliding surfaces that slide between the fixed scroll and the frame, respectively.

In one example, the restriction member includes three blind cavities, the three blind cavities and the pin sliding holes are uniformly distributed on the sliding surface of the rotation preventing mechanism and are respectively provided in a quarter sector of the sliding surface.

In one example, the blind cavity is open on one of the pair of sliding surfaces and closed on the other of the pair of sliding surfaces.

In one example, the open side of the blind cavity faces the side of the orbiting scroll.

In one example, the restraining member is cylindrical in shape with each sliding surface being circular, and the pin sliding hole has a circular opening that opens on each sliding surface.

In one example, the pin sliding hole is an eccentric hole.

In one example, the scroll compressor further includes a crankshaft coupled to the actuation structure and the orbiting scroll; the eccentricity of the pin sliding hole is the same as or similar to the eccentricity of the crankshaft.

In one example, the number of rotation preventing mechanisms is 3 or 4, respectively, evenly distributed along the circumference of the frame.

In one example, the rotation preventing pin is integral or separate from the frame.

Drawings

FIG. 1 is a cross-sectional view of a scroll compressor according to one embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of a scroll compressor according to another embodiment of the present utility model;

fig. 3A and 3B are perspective views of a rotation preventing mechanism in the scroll compressor shown in fig. 2;

fig. 3C is a front view of the rotation preventing mechanism shown in fig. 3B;

fig. 3D is a cross-sectional view taken along section A-A in fig. 3C.

Detailed Description

The technical scheme of the utility model is further described in detail below through specific embodiments and with reference to the accompanying drawings. In the present specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

A scroll compressor according to an embodiment of the present utility model will be described with reference to the accompanying drawings.

Reference is made to fig. 1. Fig. 1 illustrates a cross-sectional view of a scroll compressor 100 according to one embodiment of the present utility model. The scroll compressor 100 shown in fig. 1 includes: a scroll compressor housing 1; a frame 2, the frame 2 being fixed within the scroll compressor housing 1; a fixed scroll 3 fixed in the scroll compressor housing 1; an orbiting scroll 4 rotatably supported on the frame 2 and engaged with the fixed scroll 3 to form a gas compression chamber 11; a lower support frame 5 fixed to a lower end of the scroll compressor housing 1; an actuating mechanism 6, the actuating mechanism 6 being fixed to the lower end of the scroll compressor 100, which transmits the rotational force thereof through a crankshaft 7. The upper end of the crankshaft 7 is connected with the movable scroll 4 to drive the movable scroll 4 to rotate, and the lower end of the crankshaft 7 is supported on the lower support frame 5; and a discharge valve 8 for discharging the gas in the gas compression chamber 11 and preventing the gas from flowing back into the scroll compressor 100.

In this embodiment, the orbiting scroll 4 is supported on an upper surface or support surface of the housing 2; the scroll compressor housing 1 defines a closed space therein, and accommodates the above-mentioned fixed scroll 3, movable scroll 4, frame 2, and the like therein. The spiral line structure of the fixed scroll 3 and the spiral line structure of the movable scroll 4 are cooperatively engaged or joined with each other to form a gas compression chamber 11. In the present embodiment, the fixed scroll 3 is disposed above the movable scroll 4. The actuating mechanism 6 is a motor comprising a stator and a rotor, which motor drives the orbiting scroll 4 via a crankshaft 7.

When the scroll compressor 100 operates, gas is sucked from the suction port 9, after the actuation mechanism 6 (e.g., a motor) is started, the movable scroll 4 is driven by the crankshaft 7 and restrained by the rotation preventing mechanism (not shown), and makes a small-radius planar rotation around the base circle center of the fixed scroll 3, thereby generating high-temperature and high-pressure gas in the gas compression chamber 11 formed by the movable scroll 4 and the fixed scroll 3, which is discharged into the high-pressure chamber 12 through the discharge valve 8 along with the movement of the movable scroll 4, at this time, the discharge valve 8 can be used to prevent the backflow of the gas in the high-pressure chamber 12; eventually the gas in the high pressure chamber 12 is exhausted through the exhaust port 10. By circulating the above process, high-temperature and high-pressure gas can be continuously generated in the scroll compressor 100.

Reference is made to fig. 2. Fig. 2 illustrates a partial cross-sectional view of a scroll compressor including a rotation preventing mechanism according to another embodiment of the present utility model. The rotation preventing mechanism 20 is for preventing the stopper scroll 4 from rotating, and includes a rotation preventing pin 21, a housing hole 22, and a restricting member 23.

Specifically, the rotation preventing pin 21 protrudes outward from the main body of the housing 2, and protrudes upward from the main body of the housing 2 as shown in fig. 2. The receiving hole 22 is provided at a side of the frame 2 facing the bottom of the orbiting scroll 4 and opposite to the scroll line 13 on the orbiting scroll 4. That is, the accommodation hole 22 and the scroll wire 13 are located at both sides of the main body of the orbiting scroll 4, respectively. The restriction member 23 is accommodated in the accommodation hole 22.

As shown in fig. 3A to 3D, the restriction member 23 includes a pin sliding hole 24 and at least one blind cavity 25. The pin sliding hole 24 engages with the rotation preventing pin 21. At least one blind cavity 25 is provided on the body of the restriction member 23 and is spaced from the pin sliding hole 24. The rotation preventing pin 21 may be integral with or separate from the housing 2.

A minute gap exists between the inner peripheral surface of the pin sliding hole 24 and the outer peripheral surface of the rotation preventing pin 21, and between the restricting member 23 and the accommodating hole 22 to enable the orbiting scroll 4 to revolve.

It will be understood that, when the crankshaft 7 is operating normally, the scroll compressor contains the working fluid or the refrigerant and flows in the chamber (or crank chamber) in which the crankshaft 7 is located, and therefore the rotation preventing mechanism 20 can be lubricated by the refrigerant flowing into the small gap with the flow of the refrigerant into the crank chamber.

In fig. 3A to 3D, it is shown that: the rotation preventing mechanism 20 includes three blind cavities 25, each blind cavity 25 and pin sliding hole 24 being uniformly provided on a sliding surface 26 of the rotation preventing mechanism 20, respectively ₁ And are respectively arranged on the sliding surfaces 26 ₁ Is in a quarter sector of the circle. In the present embodiment, the rotation preventing mechanism 20 is substantially cylindrical and has upper and lower surfaces that are cylindrical surfaces, each of which is the sliding surface. As described above, the restricting member 23 has a pair of sliding surfaces 26 ₁ 、26 ₂ Which slide between the fixed scroll 3 and the frame 2, respectively.

It will be appreciated that the rotation preventing mechanism 20 may be shaped as desired rather than cylindrical, such as oval or other feasible shapes, and that the blind cavity and sliding surface therein may be shaped as desired rather than circular.

The pin sliding hole 24 is shaped to match the shape of the rotation preventing pin 21, and is generally provided in a cylindrical shape or a circular ring shape. The pin sliding hole 24 has a sliding surface 26 at each sliding surface ₁ 、26 ₂ A circular opening with an upper opening, i.e. the pin sliding holes 24 pass through a pair of sliding surfaces 26 ₁ 、26 ₂ Rather than blind holes.

In one example, the pin slide hole 24 is an eccentric hole. The eccentricity of the pin sliding hole 24 is the same as or similar to the eccentricity of the crankshaft 7.

In one example, 3 or 4 or more rotation preventing mechanisms 20 are uniformly distributed along the circumference of the housing 2 at the same height level of the scroll compressor 100, and the specific number thereof may be selected according to actual needs.

Blind cavity 25 is formed on a pair of sliding surfaces 26 ₁ 、26 ₂ One of which is open and the other is closed. Specifically, the open side of the blind cavity 25 faces the side on which the orbiting scroll 4 is located.

In order to reduce the weight of the restriction member 23, it may be made of PEEK material. The PEEK material is relatively expensive and the present utility model achieves the goals of reducing the amount of material and reducing the weight of the parts by providing at least one blind cavity 25.

When the lubrication oil or the refrigerant flows upward from the crank chamber along the connecting hole (or the above-described minute gap) in the frame 2 due to the rotation of the crank shaft 7, the rotation preventing mechanism 20 can prevent too much lubrication oil from reaching the gas compression chamber (i.e., the chamber formed by the spiral lines of the orbiting scroll and the fixed scroll), and only proper lubrication oil reaches the lubrication function. Too much lubricant reaches the compression chamber, which can lead to discharge into the compression system, and which is detrimental to the proper operation of the compression system. Therefore, in the present embodiment, a small amount of lubricating oil adheres between the rotation preventing pin 21 and the accommodation hole 22 of the housing 2 to lubricate the friction surface.

Note that the scroll compressor of the present utility model is not limited to the specific structural type shown in fig. 1 and 2, as long as any type of scroll compressor to which the concept of the present utility model can be applied can be used as the scroll compressor of the present utility model.

The foregoing is merely some embodiments of the present utility model, and it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A scroll compressor, comprising:

a scroll compressor housing;

the fixed scroll plate is fixed in the scroll compressor shell;

a housing mounted within the scroll compressor housing;

an orbiting scroll rotatably supported on the frame and engaged with the fixed scroll;

an actuating mechanism fixed at the lower end of the scroll compressor and connected with the movable scroll to drive the movable scroll to rotate,

an autorotation preventing mechanism for preventing the autorotation of the movable scroll comprises:

2. The scroll compressor of claim 1, wherein,

the restricting member further includes a pair of sliding surfaces that slide between the fixed scroll and the frame, respectively.

3. The scroll compressor of claim 2, wherein,

the limiting member comprises three blind cavities, wherein the three blind cavities and the pin sliding holes are uniformly distributed on a sliding surface of the rotation preventing mechanism and are respectively arranged in a quarter sector of the sliding surface.

4. A scroll compressor according to claim 3, wherein,

the blind cavity is open on one of the pair of sliding surfaces and closed on the other of the pair of sliding surfaces.

5. The scroll compressor of claim 4, wherein,

the open side of the blind cavity faces the side on which the orbiting scroll is located.

6. The scroll compressor of claim 2, wherein,

the limiting member has a cylindrical shape in which each of the sliding surfaces is circular,

the pin sliding hole has a circular opening on each of the sliding surfaces.

7. The scroll compressor of claim 1, wherein,

the pin sliding hole is an eccentric hole.

8. The scroll compressor of claim 7, wherein,

the scroll compressor further includes a crankshaft coupled to the actuation structure and the orbiting scroll;

the eccentricity of the pin sliding hole is the same as or similar to the eccentricity of the crankshaft.

9. The scroll compressor of any one of claims 1 to 8, wherein,

the number of the rotation preventing mechanisms is 3 or 4, and the rotation preventing mechanisms are uniformly distributed along the circumference of the frame.

10. The scroll compressor of claim 1, wherein,

the rotation preventing pin is integral with or separate from the frame.