CN105604914A - Combined type piston and connecting rod assembly of refrigeration compressor and installation method of assembly - Google Patents

Abstract

The invention discloses a combined piston and connecting rod assembly of a refrigeration compressor and an installation method thereof. The rod installation device is installed with a rotating connecting rod positioning ring so that the rotating connecting rod outer ring, rotating connecting rod positioning ring and crank rotating connecting rod fixed shaft are installed concentrically, the crank rotating connecting rod fixed shaft is fixedly connected with the connecting rod, and the connecting rod and the piston device Connected, the piston device is equipped with a piston skirt, a ball bracket and a ball upper cover, and an oil groove, an oil hole, and an oil chamber so that the invention can always move concentrically and coaxially while ensuring a high degree of lubrication, and the installation method of the invention is simple and practical , high installation precision, simple structure, low difficulty of parts, strong and durable, improve work efficiency and service life.

Description

A combined piston and connecting rod assembly of a refrigeration compressor and its installation method

technical field

The invention relates to the field of refrigeration equipment, in particular to a refrigeration compressor combined piston and connecting rod assembly and an installation method thereof.

Background technique

Whether it is a refrigerator or a freezer and other refrigeration equipment, their "heart" is a fully enclosed piston compressor. It is the piston in the "heart" that drives the flow of refrigerant. The piston is driven by the crankshaft, and through the transmission of the force of the connecting rod, the piston is driven to perform telescopic and reciprocating linear motion in the cylinder. Because the connecting rod is in the compound motion of swinging back and forth and left and right when it works, and the piston is in linear motion. In order to eliminate the interference on the piston caused by the external force in the direction of non-linear motion caused by the swing of the connecting rod, the existing connection between the piston and the connecting rod is mainly connected by a ball. Therefore, how to better connect the sphere and the piston is the key. In the existing structure, two semicircular bowl-shaped metals are usually stamped and then welded; or one of the semicircular shapes is made of plastic parts, while the other semicircular shape is made of metal parts with more complicated shapes . Regardless of the combination, although the ball can be installed therein, the final result is that either the installation accuracy cannot meet the requirements of the compressor, or the service life of the piston is very short. At the same time, the manufacturing cost and installation difficulty are relatively high, thereby affecting the service life and manufacturing cost of the complete machine.

Contents of the invention

The object of the present invention is to provide a combined piston and connecting rod assembly of a refrigeration compressor and its installation method, including a rotating connecting rod installation device, a connecting rod and a piston device, and a rotating connecting rod positioning ring is installed in the rotating connecting rod installation device The outer ring of the rotating connecting rod, the positioning ring of the rotating connecting rod and the fixed shaft of the crank rotating connecting rod are installed concentrically. The fixed shaft of the crank rotating connecting rod is fixedly connected with the connecting rod. The bracket and the upper cover of the sphere, as well as the oil groove and oil hole oil chamber opened, make the invention always move concentrically and coaxially while ensuring high lubricity, and the installation method of the invention is simple and practical, with high installation accuracy, simple structure, and low difficulty in making parts , sturdy and durable, improve work efficiency and service life.

In order to achieve the above object, technical scheme of the present invention is:

A combined piston and connecting rod assembly for a refrigeration compressor, comprising a rotating connecting rod installation device, a connecting rod and a piston device, the rotating connecting rod installing device is connected with the piston device through a connecting rod, and the rotating connecting rod installing device includes a rotating The connecting rod outer ring, the rotating connecting rod positioning ring is installed in the rotating connecting rod outer ring, the rotating connecting rod positioning ring is installed on the crank rotating connecting rod fixed shaft, the rotating connecting rod outer ring, rotating connecting rod positioning The ring is installed concentrically with the fixed shaft of the crank rotating connecting rod. The fixed shaft of the crank rotating connecting rod is fixedly connected with one end of the connecting rod, and the other end of the connecting rod is connected with the piston device. A ball bracket connected to the piston skirt of the piston outer casing is installed, the ball bracket is fixedly connected with the sphere upper cover by welding, the edge of the sphere upper cover is connected with the piston skirt, and the ball bracket and the sphere upper cover form a ball Body cavity, the ball cavity is built with a ball riveted with the connecting rod, the ball bracket, the connecting rod and the ball form an oil cavity, the oil cavity is connected with the outer ring of the rotating connecting rod, the positioning ring of the rotating connecting rod, and the connecting rod. The connecting rod oil groove of the rod is connected, and the oil chamber is connected with the oil groove, the oil groove of the piston skirt ring, the oil hole of the piston, the oil hole of the upper cover of the sphere, and the oil hole of the piston skirt.

A method for installing a combined piston and connecting rod assembly of a refrigeration compressor. The outer ring of the rotating connecting rod is provided with a cavity for the fixed shaft of the crank rotating connecting rod to be installed. Angle can be installed on the fixed shaft of the crank rotating connecting rod; the second step, the rotating connecting rod that is concentric with the outer ring of the rotating connecting rod and the fixed shaft of the crank rotating connecting rod is installed in the cavity and outside the fixed shaft of the crank rotating connecting rod Locating ring.

The sphere cavity includes a concave spherical surface of the sphere support to ensure the concentricity of the center of the sphere support and the center of the piston skirt, and a concave spherical surface of the upper cover of the sphere to ensure the concentricity of the center of the sphere support and the center of the piston skirt.

The sphere bracket is provided with 6-8 oil grooves for sufficiently lubricating the sphere cavity.

The two ends of the ball bracket are closed and fixedly connected with the piston skirt body, and the outer edge of the middle part of the ball bracket is closed and fixedly connected with the bottom opening of the piston skirt body.

The beneficial effects of the present invention are: a combined piston and connecting rod assembly of a refrigeration compressor and its installation method of the present invention include a rotating connecting rod installation device, a connecting rod and a piston device, and a rotating connecting rod installation device is installed in the rotating connecting rod installation device. The rod positioning ring makes the outer ring of the rotating connecting rod, the positioning ring of the rotating connecting rod and the fixed shaft of the crank rotating connecting rod concentrically installed. The fixed shaft of the crank rotating connecting rod is fixedly connected with the connecting rod, and the connecting rod is connected with the piston device. The skirt body, the sphere bracket and the sphere upper cover, as well as the oil groove and oil hole oil cavity make the invention always move concentrically and coaxially while ensuring high lubricity, and the installation method of the invention is simple and practical, with high installation accuracy and simple structure. The parts are less difficult, durable, and improve work efficiency and service life.

Description of drawings

Fig. 1 is a sectional view of the present invention;

Fig. 2 is the assembly drawing of the present invention;

Fig. 3 is an enlarged sectional view of the piston device in Fig. 1;

Fig. 4 is an assembly drawing of the piston device in Fig. 1;

Fig. 5 is an enlarged cross-sectional view of the crank rotating connecting rod installation device in Fig. 1 .

detailed description

Example 1

As shown in Figure 1-5, a combined piston and connecting rod assembly of a refrigeration compressor includes a rotating connecting rod installation device 1, a connecting rod 2 and a piston device 3, and the rotating connecting rod installation device 1 connects the connecting rod 2 and the piston The device 3 is connected, and the rotating connecting rod installation device 1 includes a rotating connecting rod outer ring 4, a rotating connecting rod positioning ring 5 is installed in the rotating connecting rod outer ring 4, and a crank is installed in the rotating connecting rod positioning ring 5 The rotating connecting rod fixed shaft 6, the rotating connecting rod outer ring 4, the rotating connecting rod positioning ring 5 and the crank rotating connecting rod fixing shaft 6 are concentrically installed, and the crank rotating connecting rod fixing shaft 6 is fixedly connected with one end of the connecting rod 2, The other end of the connecting rod 2 links to each other with the piston device 3, and the piston device 3 includes a piston jacket 7, and a ball bracket 9 connected to the piston skirt body 8 of the piston jacket 7 is installed in the piston jacket 7, the ball bracket 9 is fixedly connected with the sphere upper cover 10 by welding, the edge of the sphere upper cover 10 is connected with the piston skirt 8, the sphere bracket 9 and the sphere upper cover 10 form a sphere cavity 11, and the sphere cavity 11 is built with a connection The sphere 12 formed by riveting the rod 2, the sphere bracket 9, the connecting rod 2 and the sphere 12 form an oil chamber 13, the oil chamber 13 is connected with the outer ring 4 of the rotating connecting rod, the positioning ring 5 of the rotating connecting rod, and the connecting rod The connecting rod oil groove 14 of 2 is communicated with, and described oil chamber 13 is communicated with oil groove 15, piston skirt body ring oil groove 16, piston oil hole 17, ball loam cake oil hole 18, piston skirt body oil hole 19.

A method for installing a combined piston and connecting rod assembly of a refrigeration compressor. The outer ring 4 of the rotating connecting rod is provided with a cavity for installing the fixed shaft 6 of the crank rotating connecting rod. In the first step, the cavity is installed The rotating connecting rod fixed shaft 6 that can only be installed by rotating at a certain angle; in the second step, in the cavity and outside the crank rotating connecting rod fixed shaft 6, there is a device that is concentric with the rotating connecting rod outer ring 4 and the crank rotating connecting rod fixed shaft 6. Rotate the connecting rod positioning ring 5.

Described sphere cavity 11 comprises the sphere support concave spherical surface 20 that guarantees the center of sphere support 9, the concentricity of piston skirt 8 centers and the sphere upper cover concave spherical surface 21 that guarantees the concentricity and coaxiality of sphere support 9 centers and piston skirt 8 centers .

The spheroid support 9 is provided with 6-8 oil grooves to make the spheroid cavity 11 sufficiently lubricated.

Both ends of the ball bracket 9 are closed and fixedly connected with the piston skirt 8 , and the outer edge of the middle part of the ball bracket 9 is closed and fixedly connected with the bottom opening 22 of the piston skirt 8 .

A combined piston and connecting rod assembly of a refrigeration compressor and its installation method in this embodiment include a rotating connecting rod installation device, a connecting rod and a piston device, and a rotating connecting rod positioning ring is installed in the rotating connecting rod installation device to make the rotating connecting rod The outer ring of the rod, the positioning ring of the rotating connecting rod and the fixed shaft of the crank rotating connecting rod are installed concentrically. The fixed shaft of the rotating connecting rod is fixedly connected with the connecting rod. The upper cover, and the oil groove, oil hole and oil chamber set up make the invention always move concentrically and coaxially while ensuring high lubricity, and the installation method of the invention is simple and practical, with high installation precision, simple structure, low difficulty in making parts, and strong and durable , improve work efficiency and service life.

Claims (4)

1. a refrigeration compressor combined type piston and link assembly, it is characterized in that: comprise pivot link erecting device (1), connecting rod (2) and piston apparatus (3), described pivot link erecting device (1) is connected with piston apparatus (3) by connecting rod (2), described pivot link erecting device (1) comprises pivot link outer ring (4), pivot link centring ring (5) is installed in described pivot link outer ring (4), crank pivot link fixed axis (6) is installed in described pivot link centring ring (5), described pivot link outer ring (4), pivot link centring ring (5) and crank pivot link fixed axis (6) are installed with one heart, described crank pivot link fixed axis (6) is fixedly linked with connecting rod (2) one end, described connecting rod (2) other end is connected with piston apparatus (3), described piston apparatus (3) comprises piston jacket (7), the spheroid support (9) being connected with the piston skirt body (8) of piston jacket (7) is installed in described piston jacket (7), described spheroid support (9) is connected by being welded and fixed with spheroid upper cover (10), described spheroid upper cover (10) edge is connected with piston skirt body (8), described spheroid support (9) is formed with spheroid chamber (11) with spheroid upper cover (10), described spheroid chamber (11) is built-in with connecting rod (2) and rivets the spheroid (12) forming, described spheroid support (9), connecting rod (2) is formed with oil pocket (13) with spheroid (12), described oil pocket (13) and perforation pivot link outer ring (4), pivot link centring ring (5), the connecting rod oil line (14) of connecting rod (2) is connected, described oil pocket (13) and oil groove (15), piston skirt body endless-oil groove (16), piston oilhole (17), spheroid upper cover oilhole (18), piston skirt body oilhole (19) is connected,

The installation method of a kind of refrigeration compressor combined type piston and link assembly, it is characterized in that: in described pivot link outer ring (4), be provided with the cavity of installing for crank pivot link fixed axis (6), the first step, in described cavity, installation turns an angle and just can be arranged on crank pivot link fixed axis (6); Second step, in described cavity, outer being provided with of crank pivot link fixed axis (6) make the pivot link centring ring (5) concentric with pivot link outer ring (4), crank pivot link fixed axis (6).

2. a kind of refrigeration compressor combined type piston according to claim 1 and link assembly, is characterized in that: described spheroid chamber (11) comprises the spheroid support concave spherical surface (20) that ensures spheroid support (9) center, piston skirt body (8) centres axiality and the spheroid upper cover concave spherical surface (21) that ensures spheroid support (9) center, piston skirt body (8) centres axiality.

3. a kind of refrigeration compressor combined type piston according to claim 1 and link assembly, is characterized in that: on described spheroid support (9), offer and make enough lubricated 6-8 bar oil grooves of spheroid chamber (11).

4. a kind of refrigeration compressor combined type piston according to claim 1 and link assembly, it is characterized in that: described spheroid support (9) two ends and piston skirt body (8) closure are fixedly linked, outward flange and piston skirt body (8) bottom opening (22) closure at described spheroid support (9) middle part are fixedly linked.