KR102489151B1 - Methods for manufacturing rotor-type compression assemblies - Google Patents

Abstract

It relates to a sliding vane assembly, a rotor-type compression assembly including the sliding vane assembly, and a compressor, wherein the sliding vane assembly includes a sliding vane (1) and a connecting member (10) for connecting the sliding vane (1) and the piston (2). Including, one end of the connecting member 10 is swingably connected to the sliding vane 1, and the other end is swingably connected to the piston 2.

Description

Methods for manufacturing rotor-type compression assemblies

The present invention relates to the field of compressor technology, and specifically to a method for manufacturing a sliding vane assembly and a rotor type compression assembly.

The rotor type compressor has a high efficiency, a compact structure, a small volume, and a light weight, and is widely used, for example, in air conditioners such as home appliances.

The compression assembly is an important part of a rotor type compressor. Compression assemblies mainly include cylinders, pistons, sliding vanes and crankshafts. The piston is located inside the cylinder and sleeved to the crankshaft along the axial direction of the crankshaft. A spring hole and a sliding vane groove are provided in the cylinder, a spring is installed in the spring hole, the sliding vane is seated in the sliding vane groove, the shape is matched to the sliding vane groove, and the sliding vane tail can compress the spring, The sliding vane may move along the radial direction of the cylinder in the sliding vane groove. When the compression mechanism operates, the head of the sliding vane is kept in close contact with the piston under the action of the spring at the tail, forming an airtight structure for motion, and the inside of the cylinder is divided into an intake chamber and a compression chamber, so that the crankshaft Under the action, it completes the process of intake, compression and exhaust.

The outer shape of a conventional cylinder is all irregular in shape, and in a cross section perpendicular to the axial direction, a protruding portion is added to a ring portion, and the axial direction refers to a direction parallel to the axial direction of the crankshaft. For example, as shown in FIG. 1, the compressor cylinder 3 includes a ring portion and a protrusion portion 5, and accommodates the sliding vane 1, the piston 2 and the eccentric portion of the crankshaft inside the ring, , the protruding portion 5 is used to provide the spring hole 7 and the spring 6.

Such a compression assembly has the following problems.

(1) Since the outer shape of the cylinder is irregular, it can only be manufactured in the form of casting or welding, which has high cost and low efficiency.

(2) A spring hole must be provided in the cylinder, and a protrusion must be added to accommodate the spring and spring hole structure. At the same time as the amount of raw materials is increased, the processing process is also increased, and the processing process is complicated, increasing the manufacturing cost and difficulty of processing the cylinder.

(3) Due to the existence of the spring, on the one hand, during the operation of the compression assembly, some energy is necessarily used to overcome the spring force, resulting in loss, resulting in wasted energy; on the other hand, the spring itself has a fatigue life limit, so the spring life If a problem occurs, it can directly cause the compressor to become invalid.

(4) In this assembly, the sliding vane is in direct contact with the piston, forming dual friction, and friction wear of the tip of the sliding vane and the outer diameter of the piston cannot be avoided during operation, and this wear increases with the increase of the compressor operating cycle. , seriously affect the relative sealability and service life of the compressor.

Accordingly, a structure for connecting a piston and a sliding vane with a hinge is proposed, a concave groove penetrating in the axial direction is provided on the outer circumferential wall of the piston, the sliding vane has a head end and a tail, and the head end shape matches the concave groove and is fit into the concave groove so as to be swingable to realize a hinged connection between the sliding vane and the piston in the concave groove. For example, the sliding vane cross-sectional shape disclosed in the Chinese patent document with application number CN89202761.4 is a combination of a rectangular and circular head end, and a circular hole matching the outer shape of the cylindrical head end of the slide vane is provided on the piston. When the head end of the vane is inserted into the circular hole, the sliding vane and the piston are connected to each other by a hinge connection.

Although the hinge connection structure of the piston and the sliding vane can improve the frictional wear situation of the sliding vane and the piston, the following problems still exist.

(1) There is no change in the shape of the cylinder, and the ring part is still added with a protrusion part to form an irregular shape, which does not solve the conventional problem of waste of material and complicated processing process.

(2) The outer shape of the sliding vane in the structure is complicated, and it is a shape in which the flat part of the rear part is connected to the head end of the cylindrical structure. Since the sliding vane itself is required to have fairly high surface precision and strength, and must satisfy the airtightness of the compressor, these sliding vanes can be processed separately from each other in a cylindrical structure or a flat structure, or processed the entire surface integrally. And, using the conventional processing manufacturing process, large-scale mass production and precision requirements cannot be satisfied, and it does not have practical feasibility.

In order to solve the problems of the prior art, the present invention provides a method of manufacturing a rotor type compression assembly.

With respect to the prior art described above, the present invention is a sliding vane assembly including a sliding vane, the sliding vane assembly further includes a connecting member for connecting the sliding vane and the piston,

One end of the sliding vane is provided with a second concave groove penetrating in an axial direction in a direction parallel to the axial direction of the piston;

The other end of the sliding vane is matched with the sliding vane guide groove provided in the cylinder, and can move along the radial direction of the cylinder in the sliding vane guide groove;

At one end of the connecting member, a second protrusion matching the second concave groove is provided, and the second protrusion fits into the second concave groove so that the connecting member is swingably connected to the sliding vane;

At the other end of the connecting member, a first protrusion matching a first concave groove penetrating in an axial direction from an outer circumferential wall of the piston is provided. ) It provides a sliding vane assembly, characterized in that it can be connected swingably to.

Preferably, the cross section of the first concave groove is a first circular arc forming an opening. In order to improve the restraint of the piston to the connecting member, the width of the opening is smaller than the diameter of the first circular arc.

Preferably, the cross section of the second concave groove is a second circular arc forming the opening. In order to improve the restraint of the sliding vane to the connector, the width of the opening is smaller than the diameter of the second circular arc.

The present invention is a rotor type compression assembly including the above-described sliding vane assembly and further including a cylinder and a piston, wherein a sliding vane guide groove is provided in the cylinder, a sliding vane is seated in the sliding vane guide groove, and a sliding vane guide can move along the radial direction of the cylinder within the groove; The outer circumferential wall of the piston is provided with a first concave groove penetrating in the axial direction, the first concave groove is matched with the first projection on the connecting member, the first projection is fitted to the first concave groove, and the connecting member is matched with each other. It further provides a rotor-type compression assembly capable of being swingably connected to the piston.

The axial direction refers to a direction parallel to the crankshaft axial direction.

Preferably, the cylinder forms a ring shape along a cross section perpendicular to the axial direction.

Preferably, the cylinder is further provided with a hole that communicates with the outside of the cylinder, and can be used to inhale or discharge gas inside the cylinder or inject liquid or the like into the cylinder.

The manufacturing method of the rotor type compression assembly of the present invention,
Manufacturing a cylinder (3) having a ring shape in cross section perpendicular to the axial direction and having a sliding vane groove (8);
Manufacturing a piston (2) disposed inside the cylinder (3);
manufacturing a sliding vane 1 that is inserted into the sliding vane groove 8 and slides;
Manufacturing a connecting member 10 connecting the sliding vane 1 and the piston 2; and
In the axial direction, the first protrusion 13 of the connecting member 10 is inserted into the first concave groove 11 formed on the outer circumferential wall of the piston 2, and the second protrusion 14 of the connecting member 10 Including; inserting into the second concave groove 12 formed at one end of the sliding vane 1,
The step of manufacturing the cylinder 3 is,
(1-1) cutting the pipe material along the axial direction so that the cross section perpendicular to the axial direction forms a ring shape;
(1-2) step of processing the structural unit including the sliding vane groove 8 inside the cylinder 3 by roughing the pipe obtained in step (1-1);
(1-3) step of obtaining the cylinder 3 by performing precision processing;
The step of manufacturing the piston 2 is,
After manufacturing the hollow ring-shaped piston body 20, drilling a hole 21 penetrating the piston body 20 along the axial direction at a position close to the outer circumference of the piston body 20 (2-1) step;
Step (2-2) of reaming and then honing the hole 21 obtained in step (2-1) so that the surface of the hole 21 reaches a certain precision;
(2-3) obtaining the first concave groove 11 by grinding the entire outer diameter of the piston body 20 until a portion of the hole 21 is polished and removed;
The step of manufacturing the sliding vane 1 is,
(3-1) drilling a hole 22 penetrating the sliding vane body 19 along an axial direction at one end of the sliding vane body 19 after manufacturing the sliding vane body 19;
Step (3-2) of reaming and then honing the hole 22 obtained in step (3-1) so that the surface of the hole 22 reaches a certain precision;
Step (3-3) of obtaining the second concave groove 12 by cutting the hole 22 obtained in step (3-2) and cutting and removing a portion of the hole 22 so that the cutting direction is parallel to the axial direction. ;
The step of manufacturing the connecting member 10 is,
Step (4-1) of preparing a steel material and preparing a mold having die holes 23 having a shape connecting spherical protrusions on both sides;
Step (4-2) of producing and obtaining a connecting material blank by precision cold rolling or precision cold drawing of steel materials in a mold and discharging them through a die hole 23;
After cutting the blank along the axial length of the sliding vane 1 and the piston 2, grinding is performed on the cut surface, and the connecting member 10 on both sides of which the first protrusion 13 and the second protrusion 14 are formed It is characterized in that it is made including; (4-3) step to obtain a).

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

delete

Compared to the prior art, the present invention has the following advantages.

(1) The cross section of the cylinder in the present invention is ring-shaped and regular in shape, which can further reduce manufacturing cost and manufacturing difficulty. Since the necessary cylinders are manufactured through processes such as cutting, broaching, and punching using tubular materials, the production cost of cylinders is greatly reduced, the production process is simplified, and large-scale production can be carried out.

(2) In the present invention, since the sliding vane and the piston are connected through a connecting material and not through the action of a spring force, on the other hand, a separate energy source is not required to overcome the spring force during the operation of the compression assembly, and energy By avoiding consumption, the energy conversion rate of the compression assembly is greatly improved; On the other hand, since there is no need to provide spring holes and springs, the thickness of the cylinder is significantly reduced, and the manufacturing cost and difficulty of manufacturing the cylinder are reduced.

(3) In the present invention, a connecting material is installed between the sliding vane and the piston to realize a hinge connection type. The sliding vane and the piston are independent of each other from the connecting material, protrusions are provided at both ends of the connecting material, and concave grooves are provided on each of the sliding vane and piston along the axial direction, and when both ends of the connecting material are fitted into the two corresponding grooves, sliding The vane and the piston constitute a combined assembly with the connecting material so that the sliding vane and the piston are hingedly connected, the piston performs circumferential motion in the cylinder by the eccentric crankshaft, and the sliding vane reciprocates under the action of the connecting material.

(4) In the present invention, the sliding vane and the piston are independent of each other from the connecting material and can be manufactured independently, so the process is simple. The connecting material can be processed and molded through a cold drawing or cold rolling process, greatly simplifying the process and enabling mass production. Pistons and sliding vanes can fully utilize conventional manufacturing processes, and are manufactured according to actual structural requirements and precision requirements. As one realization form, first, a piston body and a sliding vane body are manufactured, and then a piston having a first concave groove is obtained through drilling, reaming, honing, and grinding, and a second concave groove is obtained through drilling, reaming, honing, and cutting. A sliding vane having a groove can be obtained.

(5) In the present invention, since the installation of the spring is canceled, the sliding vane does not need to install a specially designed tail groove structure to be combined with the spring compression, simplifying the machining process, and at the same time, the length of the sliding vane can be correspondingly reduced. , saved materials, and reduced production cost.

That is, the structure of the compression assembly according to the present invention is simple, the manufacturing process is simple, the production cost can be reduced, the scale and precision production can be realized, the energy conversion efficiency can be improved, and the rotor type compressor can be used. It has a wide range of applications in air conditioning facilities.

1 is a schematic diagram of a conventional compression assembly structure.
2 is a structural schematic diagram of a compression assembly according to a first embodiment of the present invention.
Fig. 3 is a structural schematic diagram of a combination assembly formed by a sliding vane and a piston in Fig. 2 with a connecting member;
Figure 4 is a schematic diagram of each part structure of the combination assembly of Figure 3;
FIG. 5 is an enlarged view of the piston in FIG. 2 .
6 is an enlarged view of a sliding vane in FIG. 2 .
7 is a schematic diagram of a manufacturing process of a piston according to a first embodiment of the present invention.
Figure 8 is a schematic view of drilling in the sliding vane body according to the first embodiment of the present invention.
9 is a cross-sectional structural view of the sliding vane main body of FIG. 8 and a cross-sectional structural diagram of the sliding vane obtained through cutting.
10 is a schematic cross-sectional view of a die hole according to a first embodiment of the present invention and a schematic side view in an axial direction of a manufactured connector.
11 is a schematic diagram of a manufacturing process of a cylinder according to a first embodiment of the present invention.

In conjunction with the following examples, the present invention will be described in more detail.

Example 1:

As shown in Figure 2, the rotor type compression assembly includes a sliding vane (1), a piston (2) and a cylinder (3). The cylinder 3 has a ring shape along a cross section perpendicular to the axial direction, and a sliding vane guide groove, that is, a sliding vane groove 8 is provided in the cylinder 3, and the sliding vane 1 is seated in the sliding vane groove , can move along the axial direction within the sliding vane groove. The cylinder is further provided with a hole 9 communicating with the outside of the cylinder, and can be used to inhale or discharge gas inside the cylinder or inject liquid or the like into the cylinder.

The piston 2 is sleeved to the crankshaft along the axial direction of the crankshaft, inside the cylinder 3. As shown in Fig. 3, these three parts, sliding vane 1, piston 2 and connecting member 3, form a combination assembly. As shown in Fig. 4, the outer circumferential wall of the piston 2 is provided with a first concave groove 11 penetrating in the axial direction. One end of the sliding vane 1 is provided with a second concave groove 12 penetrating in the axial direction. Protrusions are provided at both ends of the connecting member 10, that is, the first protrusion 13 is provided at one end of the connecting member and the second protrusion 14 is provided at the other end. The sliding vane (1) and the piston (2) form an airtight structure for movement through the connecting material (3), divide the inside of the cylinder into an intake chamber and a compression chamber, and under the action of the crankshaft, the process of intake, compression and exhaust is performed. complete

The shape of the first protrusion 13 is matched to the first concave groove 11, and fits into the first concave groove so as to be swingable. The shape of the second protrusion 14 is matched to the second concave groove 12, so that it swingably fits into the second concave groove.

As shown in FIG. 5 , the cross section of the first concave groove 11 is the first arc 15 forming the opening, and the width of the opening portion 16 is smaller than the diameter of the first arc 15 . As shown in FIG. 6 , the cross section of the second concave groove 12 is the second arc 17 forming the opening, and the width of the opening portion 18 is smaller than the diameter of the second arc 17 .

In this embodiment, manufacturing of the compression assembly described above includes the following process.

As shown in a of FIG. 7, after manufacturing the piston body 20, the 1st concave groove is produced in the piston body, and it is concretely as follows.

Step (2-1) (Drilling): As shown in a in FIG. 7, a hole is drilled at a position approaching the outer circumference of the hollow ring-shaped piston body 20, and the hole 21 is along the axial direction of the piston. penetrates the body 20;

Step (2-2) (reaming, honing): the hole 21 is reamed and then honed, so that the hole surface reaches a certain precision;

Step (2-3) (grinding): grinding the entire outer diameter of the piston body 20 until a portion of the hole 21 is removed by grinding, and the first concave as shown in b in FIG. A piston with a groove is obtained.

As shown in a of FIGS. 8 and 9 , after the sliding vane body 19 is manufactured, a second concave groove is formed at one end of the sliding vane body 19, and specifically as follows.

Step (3-1) (piercing): As shown in FIG. 8, a hole 22 is drilled at one end of the sliding vane body 19, and the hole 22 is formed along the axial direction of the sliding vane body 19 ) through;

Step (3-2) (reaming, honing): the hole 22 is reamed and then honed, so that the surface of the hole 22 reaches a certain precision;

Step (3-3) (Cutting): Cut the hole 22 obtained in step (3-2), the direction of the cutting line is parallel to the axial direction, and cut and remove a portion of the hole 22, as shown in FIG. 9 As shown in b, a sliding vane having the second concave groove is obtained.

Through the process of precision cold drawing or precision cold rolling, the connecting material is primarily processed, molded, and manufactured, and is specifically as follows.

Step (4-1): Select a suitable steel material, prepare a mold according to the connecting material 10, and the cross section of the die hole 23 is as shown in a in FIG. 10, that is, the die hole 23 The inner wall conforms to the shape of the connector 10;

Step (4-2): Using a precision cold rolling or precision cold drawing process, a connecting material blank is produced and obtained from a steel material through a die hole 23;

Step (4-3): The blank is cut along the axial length of the sliding vane and the piston to obtain the connecting member, the axial side of which is shown in b in FIG.

Step (4-4): Grinding is performed on the cut surface in step (4-3).

In the axial direction, the first protrusion of the connecting member manufactured as described above is inserted into the first concave groove of the piston obtained as described above, and the second protrusion is inserted into the second protrusion of the sliding vane obtained as described above. When inserted into the recess, the sliding vane and piston form a hinged connection.

As shown in FIG. 11, the cylinder 3 is produced, and concretely, it is as follows.

Step (1-1): Using the steel tube 24, cut the steel tube along the axial direction to the height of the cylinder 3;

Step (1-2): Roughing the steel pipe obtained by cutting in step (1-1), processing the sliding vane groove using a broaching machine, and then punching to form the sliding vane groove (8) and hole 9 structure;

Step (1-3): The cylinder 3 is obtained by performing precision machining on the rough-cut material obtained in step (1-2).

Second Embodiment:

In this embodiment, the structure of the rotor type compression assembly is the same as that of the first embodiment, and its manufacturing process is almost the same as that of the first embodiment, with the difference being that the manufacturing process of the cylinder 3 is as follows.

Step (1-1'): manufacturing a cylinder blank through a casting method;

Step (1-2'): Roughing the cylinder blank obtained in step (1-1') to machine the structure of the sliding vane groove 8 and hole 9;

Step (1-3'): Proceed with precision machining to obtain the cylinder.

The embodiments described above have explained in detail the technical solutions of the present invention, and what has been described above is only specific embodiments of the present invention and is not intended to limit the present invention, and all implementations within the scope of the principles of the present invention It should be understood that any modification, supplement or replacement in a similar form shall fall within the protection scope of the present invention.

1: sliding vane
2: Piston
3: Cylinder
5: projection part
6: spring
7: spring hole
8: sliding vane groove
9: hall
10: connecting material
11: first concave groove
12: second concave groove
13: first protrusion
14: second protrusion
15: first arc
16: opening part
17: second arc
18: opening part
19: sliding vane body
20: piston body
21: hall
22: hall
23: die hole
24: steel pipe

Claims (22)

delete delete delete delete delete delete delete delete In the manufacturing method of the rotor type compression assembly,
Manufacturing a cylinder (3) having a ring shape in cross section perpendicular to the axial direction and having a sliding vane groove (8);
Manufacturing a piston (2) disposed inside the cylinder (3);
manufacturing a sliding vane 1 that is inserted into the sliding vane groove 8 and slides;
Manufacturing a connecting member 10 connecting the sliding vane 1 and the piston 2; and
In the axial direction, the first protrusion 13 of the connecting member 10 is inserted into the first concave groove 11 formed on the outer circumferential wall of the piston 2, and the second protrusion 14 of the connecting member 10 Including; inserting into the second concave groove 12 formed at one end of the sliding vane 1,
The step of manufacturing the cylinder 3 is,
(1-1) cutting the pipe material along the axial direction so that the cross section perpendicular to the axial direction forms a ring shape;
(1-2) step of processing the structural unit including the sliding vane groove 8 inside the cylinder 3 by roughing the pipe obtained in step (1-1);
(1-3) step of obtaining the cylinder 3 by performing precision processing;
The step of manufacturing the piston 2 is,
After manufacturing the hollow ring-shaped piston body 20, drilling a hole 21 penetrating the piston body 20 along the axial direction at a position close to the outer circumference of the piston body 20 (2-1) step;
Step (2-2) of reaming and then honing the hole 21 obtained in step (2-1) so that the surface of the hole 21 reaches a certain precision;
(2-3) obtaining the first concave groove 11 by grinding the entire outer diameter of the piston body 20 until a portion of the hole 21 is polished and removed;
The step of manufacturing the sliding vane 1 is,
(3-1) drilling a hole 22 penetrating the sliding vane body 19 along an axial direction at one end of the sliding vane body 19 after manufacturing the sliding vane body 19;
Step (3-2) of reaming and then honing the hole 22 obtained in step (3-1) so that the surface of the hole 22 reaches a certain precision;
Step (3-3) of obtaining the second concave groove 12 by cutting the hole 22 obtained in step (3-2) and cutting and removing a portion of the hole 22 so that the cutting direction is parallel to the axial direction. ;
The step of manufacturing the connecting member 10 is,
Step (4-1) of preparing a steel material and preparing a mold having die holes 23 having a shape connecting spherical protrusions on both sides;
Step (4-2) of producing and obtaining a connecting material blank by precision cold rolling or precision cold drawing of steel materials in a mold and discharging them through a die hole 23;
After cutting the blank along the axial length of the sliding vane 1 and the piston 2, grinding is performed on the cut surface, and the connecting member 10 on both sides of which the first protrusion 13 and the second protrusion 14 are formed ) Obtaining (4-3) step; manufacturing method of the rotor-type compression assembly, characterized in that comprising a.
delete delete delete delete delete delete delete delete delete delete delete delete delete

Images