A liner press-in ram

Abstract

The present application belongs to the compressor field, and particularly relates to a bushing press-in pressure head for pressing an air inlet connecting pipe of a compressor into a shell seat ring, which comprises an integral head and tail and a rubber sleeve sleeved on the tail; a conductive elastic member is further connected to the tail and arranged in a gap formed between the tail and the rubber sleeve to abut against the shell seat ring to form a conductive path. Compared with the prior art, the present application solves the problem of internal discharge sparking of the pump body caused by the instantaneous short-circuit large current generated by arc striking during the six-point welding process. The present application establishes a conductive path of the pressure head, the shell seat ring and the air inlet connecting pipe, so that the current does not pass through the discharge site in the pump body, and the compressor defects caused by the internal discharge sparking of the pump body can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of compressors, and specifically relates to a liner pressing head. Background Technology

[0002] The connection between the intake pipe and the compressor body is an important step in the compressor assembly process. Usually, the intake pipe and the cylinder intake port (housing seat ring) are assembled by interference fit.

[0003] During assembly, a tooling press head is required to press in the intake connection pipe to improve the pressing effect and ease of operation. However, the introduction of external auxiliary parts brings additional problems, such as the introduction of impurities and uneven internal and external air pressure. Existing technologies, such as CN201659396U and CN106853573A, disclose an intake connection pipe press head and an intake connection pipe pressing process method to prevent copper shavings from entering the compressor cylinder and housing, respectively. These methods avoid introducing impurities by setting sealing rings and rubber sleeves and improving the structure. For example, CN114535977A discloses a tooling press head that avoids uneven internal and external air pressure by opening a through hole inside the press head to connect the inside and outside.

[0004] However, after the intake connecting pipe is pressed in, it is necessary to weld and fix it to the housing seat ring and to the external connecting pipe (refer to the description in CN218563836U). However, in the six-point welding process, a large instantaneous short-circuit current is generated during arc initiation. This current can easily pass directly through the pump body core, causing welding discharge, which can ultimately lead to internal discharge arcing within the pump body, resulting in compressor stall and affecting product quality. Therefore, further improvement schemes are needed to avoid compressor malfunctions caused by internal discharge arcing within the pump body. Summary of the Invention

[0005] The purpose of this invention is to provide a liner press-in head to solve at least one of the aforementioned problems, thereby addressing the issue of internal discharge and arcing in the pump body caused by the instantaneous short-circuit current generated during the six-point welding process in the prior art. This invention establishes a conductive path between the press head, the housing seat ring, and the air inlet connecting pipe, preventing current from passing through the discharge points inside the pump body, effectively improving compressor malfunctions caused by internal discharge and arcing.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A liner press-in head for pressing the compressor's intake connection pipe into the housing seat ring, comprising an integral head and tail and a rubber sleeve fitted over the tail.

[0008] A conductive elastic element is also connected to the tail section. The conductive elastic element is disposed in the gap formed between the tail section and the rubber sleeve, and is used to abut against the housing seat ring to form a conductive path.

[0009] Preferably, the conductive elastic elements are spaced apart and arranged around the tail.

[0010] Preferably, the free end of the conductive elastic element is not higher than the rubber sleeve.

[0011] Preferably, the conductive elastic element is a spring sheet.

[0012] Preferably, the surfaces of the head and the tail are plated with copper, and the conductive elastic element is made of phosphor bronze, which further enhances the overall conductivity of the pressure head.

[0013] Preferably, the tail section has a groove at its end, and the rubber sleeve has a retaining strip at its end, which engages with the groove to lock the rubber sleeve to the tail section.

[0014] Preferably, the tail section has an annular groove at its end, and the rubber sleeve has an annular retaining strip at its end.

[0015] Preferably, the first end of the rubber sleeve is provided with an inlet bevel.

[0016] Preferably, the pressure head has a through hole along its axis that passes through the head and tail.

[0017] Preferably, the through hole has a stepped structure, with the diameter gradually increasing from the head to the tail.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The improved liner press-in head used in this invention establishes a conductive path between the press head, the housing seat ring, and the air inlet connecting pipe. By optimizing the materials of the press head and the conductive elastic element, the instantaneous short-circuit large current generated during the arc initiation in the six-point welding process can be diverted to the outside, avoiding the large current from directly passing through the pump body core and causing welding discharge, sparking, and ultimately compressor failure.

[0020] The improved liner pressing head used in this invention can eliminate the need for the dotting process (dotting process: deforming the liner through physical extrusion to create a connection between the housing and the air intake connecting pipe) after pressing the air intake connecting pipe into the housing seat ring; and this structure can also combine the steps of plugging the rubber sleeve and pre-installing the liner in the original assembly process, reducing the number of steps and saving workstations. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the liner pressing head according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the liner pressing head according to an embodiment of the present invention;

[0023] Figure 3 A photograph of the actual object of the liner press-in head (with rubber sleeve removed) of the embodiment of the present invention assembled on the housing seat ring (without air inlet connection pipe);

[0024] In the diagram: 1-Head; 2-Tail; 3-Rubber sleeve; 4-Conductive elastic element; 5-Clamping strip; 6-Introducing inclined surface; 7-Through hole. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] Example

[0027] A liner press-in head, such as Figure 1-3 As shown, the compressor intake connection pipe is used to press into the housing seat ring, including an integral head 1 and tail 2 and a rubber sleeve 3 sleeved on the tail 2.

[0028] The tail section 2 is also connected to a conductive elastic element 4, which is disposed in the gap formed between the tail section 2 and the rubber sleeve 3, and is used to abut against the housing seat ring to form a conductive path.

[0029] More specifically, in this embodiment:

[0030] The liner pressing head is composed of a head 1 and a tail 2, which are integrally formed, and a rubber sleeve 3 fitted over the tail 2. Furthermore, a conductive elastic element 4 is connected to the tail 2, and the conductive elastic element 4 is disposed between the tail 2 and the rubber sleeve 3. In this embodiment, as... Figure 1-3 As shown, the conductive elastic element 4 is a spring sheet, arranged around the tail 2. More specifically, this embodiment has four spring sheets, evenly spaced around the tail 2. Both the head 1 and tail 2 of the pressure head undergo uniform processing, and the conductive elastic element 4 is made of phosphor bronze to enhance the conductivity of the pressure head. The bending point of the spring sheet faces the surface of the tail 2 of the pressure head. Therefore, after the pressure head presses the air intake connecting pipe into the housing ring, the housing ring extends into the gap between the conductive elastic element 4 and the pressure head, allowing the front end of the conductive elastic element 4 to abut against the outer wall surface of the housing ring, forming a conductive path.

[0031] A groove is provided near the end of the tail 2 of the pressure head, and a retaining strip 5 is provided at the end of the rubber sleeve 3. The retaining strip 5 is engaged with the groove to achieve the engagement connection between the rubber sleeve 3 and the pressure head. In this embodiment, the cooperation of the annular groove and the annular retaining strip 5 is adopted to prevent the rubber sleeve 3 from falling off from the tail 2 of the pressure head. An inlet slope 6 is also provided at the beginning of the rubber sleeve 3, which can facilitate the housing seat ring to enter the gap and contact the conductive elastic element 4 when the air inlet connecting pipe is pressed into the housing seat ring, reducing the assembly accuracy requirements. The setting of the rubber sleeve 3 can also prevent external impurities from splashing into the compressor during welding, thereby avoiding the impact and damage of impurities on the compressor pump body. The setting height of the conductive elastic element 4, that is, the height of its free end, is usually not higher than the free end face of the rubber sleeve 3, so that in actual use, the contact between the conductive elastic element 4 and the housing seat ring is always kept within the rubber sleeve 3, and the rubber sleeve 3 can better wrap the housing seat ring and protect the conductive elastic element 4.

[0032] A through hole 7 is provided inside the head 1 and tail 2 along the axis of the pressure head, penetrating the head 1 and tail 2. This through hole 7 provides a channel connecting the inside and outside when the pressure head is pressed into the intake connecting pipe, thus preventing pressure differences between the inside and outside from causing the pressure head to burst out. Furthermore, the through hole 7 adopts a stepped structure design from the beginning of the head 1 to the end of the tail 2, with the diameter gradually increasing from the head 1 to the tail 2; in this embodiment, as... Figure 1 As shown, the first step extends from the head 1 to the front of the tail 2 (near the bending point of the spring piece), the second step extends from the front of the tail 2 to the rear of the tail 2 (the end of the rubber sleeve 3), and the third step extends from the rear of the tail 2 to the end of the tail 2. The tail 2 (from the second to the third step) can be designed as a countersunk hole to achieve overall connection and fixation of the pressure head and maintain the flatness of the external structure. The stepped through-hole 7 reduces the weight of the tail 2, thus preventing the pressure head's center of gravity from shifting towards the tail 2 and causing it to easily fall off; furthermore, the stepped structure facilitates rapid airflow and segmented heat exchange.

[0033] By using the press head with this liner, the compressor malfunction caused by internal discharge and arcing in the pump body can be improved, replacing the dotting process and eliminating the existing process of plugging the rubber sleeve 3.

[0034] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A liner press-in head for pressing the compressor's intake connecting pipe into the housing race, characterized in that, It includes an integrated head (1) and tail (2) and a rubber sleeve (3) fitted over the tail (2); The tail (2) is also connected to a conductive elastic element (4), which is disposed in the gap formed between the tail (2) and the rubber sleeve (3) and is used to abut against the housing seat ring to form a conductive path.

2. The liner pressing head according to claim 1, characterized in that, The conductive elastic element (4) is provided at intervals, and the conductive elastic element (4) is arranged around the tail (2).

3. The liner pressing head according to claim 1, characterized in that, The free end of the conductive elastic element (4) is not higher than the rubber sleeve (3).

4. The liner pressing head according to claim 1, characterized in that, The conductive elastic element (4) is a spring sheet.

5. A liner pressing head according to claim 1, characterized in that, The surfaces of the head (1) and the tail (2) are plated with copper, and the conductive elastic element (4) is made of phosphor bronze.

6. The liner pressing head according to claim 1, characterized in that, The tail (2) has a groove at its end, and the rubber sleeve (3) has a retaining strip (5) at its end. The retaining strip (5) engages with the groove to make the rubber sleeve (3) and the tail (2) engage and connect.

7. A liner pressing head according to claim 6, characterized in that, The tail (2) has an annular groove at the end, and the rubber sleeve (3) has an annular retaining strip at the end.

8. A liner pressing head according to claim 1, characterized in that, The rubber sleeve (3) is provided with an inlet ramp (6) at its first end.

9. A liner pressing head according to claim 1, characterized in that, The pressure head has a through hole (7) along its axis that passes through the head (1) and the tail (2).

10. A liner pressing head according to claim 9, characterized in that, The through hole (7) has a stepped structure, with the diameter gradually increasing from the head (1) to the tail (2).

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