阅读说明：本技术 压缩机进气孔座圈的打点系统和打点方法 (Dotting system and dotting method for air inlet seat ring of compressor ) 是由 江小兵 陈龙 廖欣 于 2019-11-18 设计创作，主要内容包括：本发明涉及压缩机技术领域,提供一种压缩机进气孔座圈的打点系统和打点方法,其中打点系统包括：压缩机,其气缸开设有贯穿缸壁的第一进气孔,壳体开设有贯穿壳壁且连通第一进气孔的第二进气孔,第一进气孔内嵌设有与缸壁接触的第一座圈,第二进气孔内嵌设有与壳壁接触且间隙环套第一座圈的第二座圈；打点机构,包括多个具有推杆的打点装置；移动夹具,打点机构固定于移动夹具上,随移动夹具移动至打点位置,打点装置驱动推杆伸出,沿径向将第二座圈压向第一座圈,使第二座圈与第一座圈之间形成多点接触。本发明能实现连接气缸的第一座圈与连接壳体的第二座圈打点接触,增加泵体组件与壳体之间的电流回路,消减泵体组件与壳体点焊时的焊接放电。(The invention relates to the technical field of compressors, and provides a dotting system and a dotting method for an air inlet seat ring of a compressor, wherein the dotting system comprises: the compressor, its air cylinder has first air inlet to run through the wall of the cylinder, the body has second air inlet to run through the shell wall and communicate the first air inlet, inlay the first seat ring contacting with wall of the cylinder in the first air inlet, inlay the second seat ring contacting with shell wall and the first seat ring of clearance ring cover in the second air inlet; the dotting mechanism comprises a plurality of dotting devices with push rods; and the dotting mechanism is fixed on the movable clamp, moves to a dotting position along with the movable clamp, and the dotting device drives the push rod to extend out to press the second seat ring to the first seat ring along the radial direction so as to form multi-point contact between the second seat ring and the first seat ring. The invention can realize point contact between the first seat ring of the connecting cylinder and the second seat ring of the connecting shell, increase the current loop between the pump body assembly and the shell and reduce welding discharge when the pump body assembly and the shell are subjected to point welding.)

1. A system of dotting of compressor inlet port seat circle which characterized in that includes:

the compressor comprises a shell and an air cylinder accommodated in the shell, wherein the air cylinder is provided with a first air inlet hole penetrating through a cylinder wall, the shell is provided with a second air inlet hole penetrating through a shell wall and communicated with the first air inlet hole, a first seat ring in contact with the cylinder wall is embedded in the first air inlet hole, and a second seat ring in contact with the shell wall and sleeved with the first seat ring in a clearance ring is embedded in the second air inlet hole;

the dotting mechanism comprises a plurality of dotting devices, and each dotting device is provided with a push rod which points to the second seat ring and can reciprocate along the radial direction of the second air inlet hole; and

and the dotting mechanism is fixed on the movable clamp, moves to a dotting position along with the movable clamp, and the dotting device drives the push rod to extend out to press the second seat ring to the first seat ring along the radial direction so as to form multi-point contact between the second seat ring and the first seat ring.

2. The dotting system according to claim 1 wherein said moving clamp comprises a first square U-shaped frame having a first end plate and two first side plates perpendicularly connected to both ends of said first end plate, respectively; and

the dotting mechanism comprises three dotting devices, and the three dotting devices are respectively fixed on the first end plate and the two first side plates.

3. The dotting system according to claim 2 wherein said moving jig comprises a second square U-shaped frame perpendicular to said first square U-shaped frame, said second square U-shaped frame having a second end plate and two second side plates perpendicularly connecting both ends of said second end plate, respectively;

the two second side plates are fixedly connected with the two first side plates respectively, the surfaces, facing the compressor, of the second end plates are provided with movable grippers, and the movable grippers retract along with the push rods so as to take out the supporting pieces embedded in the first seat rings.

4. The dotting system of claim 3, wherein the second end plate is coupled to a moving robot arm remote from a surface of the compressor.

5. The dotting system of claim 4, further comprising:

and the control mechanism is connected with the movable clamp and the dotting mechanism and is used for sequentially controlling the movable mechanical arm, the dotting device and the movable gripper.

6. The dotting system of claim 1, wherein the push rod of each dotting device is equidistant from the second race and the stroke of the push rod of each dotting device is equal.

7. The dotting system according to claim 1, wherein the push rod is shaped as a structure that tapers from an end connected to the dotting device to a rod diameter directed toward an end of the second race.

8. The dotting system of claim 1, wherein the first race and the second race are both copper tubing.

9. A dotting method for an inlet ring of a compressor, applied to a dotting system according to any one of claims 1 to 8, characterized in that said dotting method comprises:

embedding a first seat ring in a first air inlet of a compressor, enabling the first seat ring to be in contact with the cylinder wall of an air cylinder, embedding a second seat ring in a second air inlet of the compressor, enabling the second seat ring to be in contact with the shell wall of a shell and sleeved on the first seat ring in a clearance mode, and embedding a supporting piece in the first seat ring;

conveying the compressor to a designated position, driving the movable clamp to move to a dotting position, and enabling a push rod of the dotting device to point to the second seat ring;

driving the push rod to extend through the dotting device, so that the push rod presses the second seat ring to the first seat ring along the radial direction, and multipoint contact is formed between the second seat ring and the first seat ring; and

and taking out the support.

Technical Field

The invention relates to the technical field of compressors, in particular to a dotting system and a dotting method for an air inlet seat ring of a compressor.

Background

During the assembly process of the compressor, the pump body assembly and the shell need to be welded together. Welding of the pump body assembly to the housing is currently generally performed by six spot welding, using a gas shielded welding process in which carbon dioxide and argon are mixed. The six-spot welding is a welding process for fixing the pump body assembly and the housing, and the gas shielded welding is an arc welding technique for protecting an arc and a welding zone by using a gas as an arc medium.

During welding and arc striking, because contact resistances of different loops exist between the pump body assembly and the shell, potential difference exists in the pump body internal assembly, gaps in the pump body assembly are ionized under a certain condition, melting point discharge is generated, and the compressor is locked and scrapped.

In addition, the six-point welding point is usually the middle position of a welding hole of the shell, contact arc striking is adopted, large short-circuit current is instantly generated in the arc striking process, the welding arc striking position is directly contacted with a cylinder cover or a cylinder in the pump body assembly, and the current is easy to directly generate welding discharge through the inside of the pump body core.

Therefore, it is necessary to prevent the welding discharge before the pump body assembly is welded to the housing.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a dotting system and a dotting method for an air inlet seat ring of a compressor, which can form a current loop between a pump body assembly and a shell so as to reduce welding discharge during spot welding of the pump body assembly and the shell.

According to one aspect of the present invention, there is provided a dotting system for an inlet ring of a compressor, comprising: the compressor comprises a shell and an air cylinder accommodated in the shell, wherein the air cylinder is provided with a first air inlet hole penetrating through a cylinder wall, the shell is provided with a second air inlet hole penetrating through a shell wall and communicated with the first air inlet hole, a first seat ring in contact with the cylinder wall is embedded in the first air inlet hole, and a second seat ring in contact with the shell wall and sleeved with the first seat ring in a clearance ring is embedded in the second air inlet hole; the dotting mechanism comprises a plurality of dotting devices, and each dotting device is provided with a push rod which points to the second seat ring and can reciprocate along the radial direction of the second air inlet hole; and the dotting mechanism is fixed on the movable clamp, moves to a dotting position along with the movable clamp, and the dotting device drives the push rod to extend out to press the second seat ring to the first seat ring along the radial direction so as to form multi-point contact between the second seat ring and the first seat ring.

Preferably, in the dotting system, the movable clamp includes a first square U-shaped frame, and the first square U-shaped frame has a first end plate and two first side plates respectively vertically connected to two ends of the first end plate; and the dotting mechanism comprises three dotting devices, and the three dotting devices are respectively fixed on the first end plate and the two first side plates.

Preferably, in the dotting system, the movable clamp includes a second square U-shaped frame perpendicular to the first square U-shaped frame, and the second square U-shaped frame has a second end plate and two second side plates respectively perpendicularly connected to two ends of the second end plate; the two second side plates are fixedly connected with the two first side plates respectively, the surfaces, facing the compressor, of the second end plates are provided with movable grippers, and the movable grippers retract along with the push rods so as to take out the supporting pieces embedded in the first seat rings.

Preferably, in the dotting system, a surface of the second end plate away from the compressor is connected with a mobile robot arm.

Preferably, the dotting system further comprises: and the control mechanism is connected with the movable clamp and the dotting mechanism and is used for sequentially controlling the movable mechanical arm, the dotting device and the movable gripper.

Preferably, in the dotting system, the distance between the push rod of each dotting device and the second race is equal, and the stroke of the push rod of each dotting device is equal.

Preferably, in the dotting system, the push rod is formed in a structure with a gradually reduced rod diameter from the end connected with the dotting device to the end pointing to the second seat ring.

Preferably, in the dotting system, the first seat ring and the second seat ring are both copper tubes.

According to another aspect of the invention, a dotting method for an air inlet ring of a compressor is provided, which is applied to the dotting system, and the dotting method comprises the following steps: embedding a first seat ring in a first air inlet of a compressor, enabling the first seat ring to be in contact with the cylinder wall of an air cylinder, embedding a second seat ring in a second air inlet of the compressor, enabling the second seat ring to be in contact with the shell wall of a shell and sleeved on the first seat ring in a clearance mode, and embedding a supporting piece in the first seat ring; conveying the compressor to a designated position, driving the movable clamp to move to a dotting position, and enabling a push rod of the dotting device to point to the second seat ring; driving the push rod to extend through the dotting device, so that the push rod presses the second seat ring to the first seat ring along the radial direction, and multipoint contact is formed between the second seat ring and the first seat ring; and removing the support.

Compared with the prior art, the invention has the beneficial effects that:

the first seat ring of the connecting cylinder and the second seat ring of the connecting shell are in point contact through a plurality of point hitting devices, so that a plurality of current loops are formed between the pump body assembly and the shell, and welding discharge during spot welding of the pump body assembly and the shell is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of a dotting system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the dotting mechanism and the movable clamp according to an embodiment of the present invention; and

FIG. 3 is a schematic view of a first race and a second race dotted to form a multi-point contact in accordance with an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

Fig. 1 shows the main structure of a dotting system in an embodiment, fig. 2 shows the main structure of a dotting mechanism and a movable clamp in the dotting system, and with reference to fig. 1 and fig. 2, the dotting system for an air inlet ring of a compressor in the embodiment includes: the compressor 1 comprises a shell 11 and an air cylinder accommodated in the shell 11, wherein the air cylinder is provided with a first air inlet hole penetrating through a cylinder wall, the shell 11 is provided with a second air inlet hole penetrating through a shell wall and communicated with the first air inlet hole (the positions of the first air inlet hole and the second air inlet hole are marked by letters H in figure 1), a first seat ring 12 contacting with the cylinder wall is embedded in the first air inlet hole, and a second seat ring 13 contacting with the shell wall and sleeved on the first seat ring 12 in a clearance mode is embedded in the second air inlet hole; the dotting mechanism 2 comprises a plurality of dotting devices 21, and each dotting device 21 is provided with a push rod 22 which points to the second seat ring 13 and can reciprocate along the radial direction of the second air inlet hole; and the movable clamp 3, the dotting mechanism 2 is fixed on the movable clamp 3, and moves to a dotting position along with the movable clamp 3, the dotting device 21 drives the push rod 22 to extend out, and the second seat ring 13 is pressed towards the first seat ring 12 along the radial direction, so that multi-point contact is formed between the second seat ring 13 and the first seat ring 12.

Before the air inlet seat ring of the compressor is dotted, the second seat ring 13 is sleeved outside the first seat ring 12 by a clearance ring. After dotting, referring to fig. 3, a multi-point contact is formed between the second race 13 and the first race 12, for example, a point a, a point b, and a point c three-point contact is formed in the figure. Thus, because the first seat ring 12 is in contact with the cylinder of the pump body assembly of the compressor 1, and the second seat ring 13 is in contact with the shell 11 of the compressor 1, when the pump body assembly is in spot welding with the shell 11, the large current caused in the moment of arcing is directly led away through the first seat ring 12 and the second seat ring 13 in a grounding mode, and the internal structure of the compressor 1 cannot be damaged.

Wherein the first race 12 and the second race 13 are both tubular structures, such as copper tubes or other metal tubing. The dotting device 21 drives the push rod 22 to move along the radial direction of the second air inlet hole, which is equivalent to the radial direction of the second seat ring 13, so that the pipe wall of the second seat ring 13 can be pushed to contact the pipe wall of the first seat ring 12 easily. By providing a plurality of dotting devices 21, it is ensured that after dotting, a multi-point contact can be formed between the second race 13 and the first race 12. The dotting device 21 may be a single-acting cylinder or other device capable of achieving linear reciprocating motion and generating a propelling force. Through on will dotting mechanism 2 is fixed in removal anchor clamps 3, conveniently drive when needs through the removal of removing anchor clamps 3 and dotting mechanism 2 removes to suitable dotting position, realize compressor inlet port seat circle and dotting.

In one embodiment, referring to fig. 2, the movable clamp 3 includes a first square U-shaped frame 31, the first square U-shaped frame 31 having a first end plate 311 and two first side plates 312 vertically connected to two ends of the first end plate 311, respectively; the dotting mechanism 2 includes three dotting devices 21, and the three dotting devices 21 are fixed to the first end plate 311 and the two first side plates 312, respectively. The square U-shaped frame has a stable structure, and two first side plates 312 are respectively vertically connected to two ends of the first end plate 311 to form the first square U-shaped frame 31 with a stable structure, so as to ensure that the dotting device 21 is stably supported. The three dotting devices 21 are respectively fixed on the first end plate 311 and the two first side plates 312, so that dotting positions of the three dotting devices 21 are dispersed, dotting is facilitated, and multipoint contact between the second seat ring 13 and the first seat ring 12 is ensured.

Further, the movable clamp 3 further includes a second square U-shaped frame 32 perpendicular to the first square U-shaped frame 31, the second square U-shaped frame 32 having a second end plate 321 and two second side plates 322 respectively perpendicular-connected to two ends of the second end plate 321; the two second side plates 322 are respectively fixedly connected to the two first side plates 312, and the surface of the second end plate 321 facing the compressor, that is, the surface facing the first square U-shaped frame 31, is provided with a movable grip 323, and the movable grip 323 is folded along with the retraction of the push rod 22 to take out the supporting member (not specifically shown) embedded in the first seat ring 12. When the intake hole seat ring of the compressor is dotted, in order to prevent the influence of overlarge thrust of the push rod 22 on the first intake hole or the second intake hole, a solid tube columnar supporting piece is embedded in the first seat ring 12 to replace the first intake hole and the second intake hole to bear the thrust of the push rod 22 pressing the second seat ring 13 to the first seat ring 12; when the dotting between the second race 13 and the first race 12 is completed, the support is removed by moving the gripper 323.

The second square U-shaped frame 32 also has the advantage of being structurally stable to provide stable support for the striking mechanism 2. The surface of the second end plate 321 away from the compressor is connected to a mobile robot (not specifically shown in the figure) for driving the mobile clamp 3 and the dotting mechanism 2 to move to a proper dotting position.

The dotting system further comprises a control mechanism which is not specifically shown in the figure and is connected with the movable clamp 3 and the dotting mechanism 2, and the control mechanism is used for sequentially controlling the movable mechanical arm, the dotting device 21 and the movable gripper 323. Specifically, when the air inlet seat ring of the compressor needs to be dotted, firstly, the control mechanism drives the moving mechanical arm to enable the moving clamp 3 to drive the dotting mechanism 2 to move to a dotting position; then, the dotting device 21 is driven by the control mechanism, so that the push rod 22 is pushed out, and the second seat ring 13 is pressed towards the first seat ring 12 to realize multipoint contact; and then the control mechanism drives the movable gripper 323 to take out the support piece to complete the dotting process.

In one embodiment, in order to guarantee the dynamic stability of the whole structure during dotting, the distance between the push rod 22 of each dotting device 21 and the second race 13 is equal, and the stroke of the push rod 22 of each dotting device 21 is equal. Therefore, the forces applied to the second seat ring 13 by the dotting devices 21 are basically equal, the dynamic stability of the whole dotting system is ensured, the degree of multipoint contact formed between the second seat ring 13 and the first seat ring 12 is basically the same, and the influence on the structures of the first air inlet hole and the second air inlet hole caused by overlarge force application at a certain position is avoided.

In one embodiment, the push rod 22 is formed in a structure with a tapered rod diameter from the end connected with the dotting device 21 to the end pointing to the second race 13, so that the second race 13 can be pushed with a tip, which is more advantageous for achieving dotting.

The embodiment of the invention also provides a dotting method for the air inlet seat ring of the compressor, which is applied to the dotting system described in the embodiment, and the dotting method comprises the following steps: the first seat ring is embedded in a first air inlet of the compressor and is in contact with the cylinder wall of the air cylinder, the second seat ring is embedded in a second air inlet of the compressor and is in contact with the shell wall of the shell, the first seat ring is sleeved with a gap, and a support piece is embedded in the first seat ring to finish the preparation before the dotting of the air inlet seat ring of the compressor. The embedding of the first seat ring, the second seat ring and the support member can be accomplished manually or by an automated machine. The compressor is then transported to a designated location, for example, the compressor is placed on a transfer tray, and the moving fixture is driven to move to the dotting position such that the push rod of each dotting device is directed toward the second race. And then the push rod is driven to extend through the dotting device, so that the push rod presses the second race ring to the first race ring along the radial direction, and multipoint contact is formed between the second race ring and the first race ring. And finally, taking out the supporting piece, thereby finishing the dotting process.

Because the first seat ring is in contact with the cylinder of the pump body assembly of the compressor, the second seat ring is in contact with the shell of the compressor, after multipoint contact is formed between the second seat ring and the first seat ring through the hitting point of the air inlet seat ring of the compressor, when the subsequent pump body assembly and the shell are subjected to spot welding, large current caused in the moment of arcing is directly led away through the first seat ring and the second seat ring in a contact mode, and the internal structure of the compressor cannot be damaged.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.