Split type air cylinder seat of reciprocating piston compressor

Abstract

The utility model discloses a reciprocating piston compressor split type air cylinder seat which comprises a lower base, a positioning groove is formed in the top of the lower base, an air cylinder head is connected in the positioning groove in an abutting mode, the air cylinder head is installed on the lower base through a fastener, a shaft hole is formed in the lower base, and a cylinder hole is formed in the air cylinder head. According to the split type air cylinder seat, due to the fact that the bottom end part of the back plate abuts against the interior of the first positioning groove, the lower base can be used for providing more support for the air cylinder head and the air cylinder, and the requirement for the connection strength between a fastener and the lower base is lowered; and meanwhile, the first positioning groove and the second positioning groove are used for positioning when the back plate and the piston cylinder are installed, so that the installation position of the air cylinder head is conveniently determined, and the air cylinder head is prevented from moving at will in the installation process.

Description

Technical Field

[0001] This utility model relates to the field of compressor cylinder seat technology, specifically to a split-type cylinder seat for a reciprocating piston compressor. Background Technology

[0002] Existing reciprocating piston compressor cylinder blocks are generally cast in one piece and then machined into finished products. This process involves many steps and is costly. One-piece cylinder blocks also have the following disadvantages: During assembly, the piston is installed into the cylinder block first, followed by the crankshaft and connecting rod. A clearance groove needs to be cut into the cylinder head to allow the connecting rod to pass during installation. This reduces the sealing between the piston and cylinder head, increasing refrigerant loss and the possibility of refrigerant leakage. Furthermore, since the lower base and cylinder head are fixed together, any misalignment or insufficient precision in either the shaft hole or cylinder bore will render the entire cylinder block unusable, as the lower base or cylinder head cannot be replaced separately.

[0003] In existing technologies, some cylinder seats also adopt a split-type cylinder seat. However, this method involves creating a notch in the lower base, placing the cylinder head in the notch, and then inserting the insert on the cylinder head into the mounting base. The insert is then fixed to the mounting base with bolts, thus connecting the cylinder head and the lower base. This solution cannot use the lower base to support the cylinder head. The cylinder head and cylinder are entirely supported by the insert and the mounting base, resulting in greater stress between the insert and the mounting base. This places higher demands on the materials or thickness of the insert and the mounting base. Summary of the Invention

[0004] The purpose of this invention is to address the problem in the existing technology that the lower base cannot be used to support the cylinder head and cylinder, resulting in high stress between the insert and the mounting seat, and to provide a split cylinder base for a reciprocating piston compressor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a split cylinder base for a reciprocating piston compressor, including a lower base, a positioning groove is provided on the top of the lower base, a cylinder head is abutted in the positioning groove, the cylinder head is installed on the lower base by fasteners, a shaft hole is provided on the lower base, and a cylinder hole is provided on the cylinder head.

[0006] The cylinder head includes a back plate facing away from the shaft hole and a piston cylinder mounted on the back plate and facing the shaft hole, wherein the cylinder hole is formed on the piston cylinder;

[0007] The positioning groove includes a first positioning groove formed at the edge of the lower base, the bottom part of the back plate abuts against the first positioning groove, the side wall of the first positioning groove away from the edge is connected to a second positioning groove, and the bottom end of the piston cylinder is completely abutted in the second positioning groove.

[0008] In the above solution, the lower base and cylinder head in this embodiment can be processed separately and then assembled together. The cylinder head and lower base can be installed together by fasteners. For products with unqualified shaft hole or cylinder hole position, the accuracy requirements can be met by replacing the lower base or cylinder head separately, thereby improving the utilization rate of materials.

[0009] Because the bottom part of the back plate abuts against the first positioning groove, the lower base can provide more support for the cylinder head, reducing the requirements for the connection strength between the fasteners and the lower base. Because the bottom part of the back plate is exposed outside the first positioning groove, the back plate can be more easily connected to the lower base. At the same time, the first positioning groove and the second positioning groove are used for positioning when installing the back plate and the piston cylinder, respectively, so as to facilitate determining the installation position of the cylinder head and prevent the cylinder head from moving arbitrarily during the installation process.

[0010] Preferably, the bottom end of the back plate has a notch, which abuts against the first positioning groove.

[0011] In the above scheme,

[0012] Preferably, the back plate has multiple connection holes.

[0013] In the above scheme, the connecting hole is used to facilitate the installation of the cylinder on the back plate. After aligning the cylinder with the back plate, the bolt is passed through the cylinder and threaded into the connecting hole, which can realize the installation of the cylinder.

[0014] Preferably, the lower base includes a triangular portion and an elongated portion mounted on the triangular portion away from one corner of the cylinder head.

[0015] In the above solution, by designing the lower base as a triangular part and a long strip part, its structure is simpler than that of the traditional four-corner support, requires less material, and the lower base only needs to occupy less space.

[0016] Preferably, the bottom of the lower base is mounted on three support legs, which are arranged in a triangular array.

[0017] In the above scheme, the support leg is used to connect to the motor, while ensuring that the overall structure of the cylinder seat does not fully contact the motor, so that the cylinder seat has a certain vibration gap, thereby playing a buffering and shock absorption effect, and at the same time facilitating the connection between the entire cylinder seat and the motor.

[0018] Preferably, both the lower base and the cylinder head are powder metallurgy castings.

[0019] In the above solution, the bottom surface of the cylinder head and the top surface of the lower base have high precision after molding, eliminating the need for further processing of both. The cylinder head can be directly installed on the lower base, saving processing costs.

[0020] Preferably, the lower base has three first threaded holes.

[0021] In the above scheme, the first threaded hole is used to install the motor stator. After the motor stator is abutted against the base, the motor stator is fixed to the support leg by using bolt thread connection in the first threaded hole.

[0022] Preferably, the cylinder head has a through hole, and the lower base has a second threaded hole corresponding to the position of the through hole. The fastener passes through the through hole and is threaded into the second threaded hole.

[0023] In the above scheme, the fastener is a bolt, and the cylinder head is installed on the lower base through the through hole and the second threaded hole, without the need to use the first threaded hole for connection, so that the motor stator can be fixed by using the first threaded hole.

[0024] Preferably, two ear plates are installed on both sides of the cylinder head, and the fastener passes through the ear plates and is threaded onto the lower base.

[0025] In the above scheme, the fastener is a bolt, and the motor stator is installed at the bottom of the support leg. The bolt is threaded into the third threaded hole to achieve a fixed connection of the motor stator.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. This split-type cylinder base, because the bottom part of the back plate abuts in the first positioning groove, can use the lower base to provide more support for the cylinder head and cylinder, reducing the requirements for the connection strength between the fasteners and the lower base. Since the bottom part of the back plate is exposed outside the first positioning groove, the back plate can be more easily connected to the lower base. At the same time, the first positioning groove and the second positioning groove are used for positioning when installing the back plate and the piston cylinder, respectively, so as to facilitate determining the installation position of the cylinder head and prevent the cylinder head from moving arbitrarily during the installation process.

[0028] 2. The lower base and cylinder head of this split cylinder seat can be machined separately and then assembled. For products with unqualified shaft hole or cylinder hole position, the accuracy requirements can be met by replacing the lower base or cylinder head separately.

[0029] 3. The split cylinder base is manufactured using powder metallurgy technology for the lower base and cylinder head. After forming, the bottom surface of the cylinder head and the top surface of the lower base have high precision, eliminating the need for further processing on both. The cylinder head can be directly installed on the lower base, saving processing costs.

[0030] 4. Because this split-type cylinder head is assembled by first assembling the crankshaft connecting rod and piston, then installing the crankshaft connecting rod and piston into the shaft hole and cylinder hole respectively, and finally installing the lower base and cylinder head together, the cylinder head does not need to have a clearance groove, which can increase the sealing zone between the piston and the cylinder head and increase the cooling capacity. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0032] Figure 2 This is a three-dimensional structural diagram of the cylinder seat according to Embodiment 1 of this utility model.

[0033] Figure 3 This is a top view of the structure of Embodiment 1 of this utility model.

[0034] Figure 4 This is a schematic diagram of the left side of Embodiment 1 of this utility model.

[0035] Figure 5 This is a top view of the structure of Embodiment 1 of the present invention with the cylinder head removed.

[0036] Figure 6 This is a bottom view of the structure of Embodiment 1 of this utility model.

[0037] Figure 7 This is a front view structural diagram of Embodiment 1 of this utility model.

[0038] Figure 8 This is a top view of the structure of Embodiment 2 of this utility model.

[0039] Figure 9 This is a top view of the structure of Embodiment 2 of this utility model with the cylinder head removed.

[0040] In the diagram: 1. Lower base; 101. Triangular part; 102. Long strip part; 2. Cylinder head; 201. Back plate; 202. Piston cylinder; 203. Connecting block; 204. Notch; 3. Fastener; 4. Shaft hole; 5. Cylinder hole; 6. Positioning groove; 601. First positioning groove; 602. Second positioning groove; 7. Connecting hole; 8. Support leg; 9. First threaded hole; 10. Through hole; 11. Second threaded hole; 12. Ear plate; 13. Crankshaft connecting rod; 14. Third threaded hole. Detailed Implementation

[0041] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1

[0042] Please refer to Figures 1 to 7 In this embodiment, a reciprocating piston compressor split cylinder base includes a lower base 1, a positioning groove 6 is provided on the top of the lower base 1, a cylinder head 2 is abutted in the positioning groove 6, the cylinder head 2 is installed on the lower base 1 by fasteners 3, a shaft hole 4 is provided on the lower base 1, and a cylinder hole 5 is provided on the cylinder head 2.

[0043] The cylinder head 2 includes a back plate 201 facing away from the shaft hole 4 and a piston cylinder 202 mounted on the back plate 201 and facing the shaft hole 4. The cylinder hole 5 is opened on the piston cylinder 202.

[0044] The positioning groove 6 includes a first positioning groove 601 formed at the edge of the lower base 1. The bottom part of the back plate 201 abuts against the first positioning groove 601. The side wall of the first positioning groove 601 away from the edge is connected to a second positioning groove 602. The bottom end of the piston cylinder 202 is completely abutted in the second positioning groove 602.

[0045] In this embodiment, the lower base 1 and the cylinder head 2 can be processed separately and then assembled together. The cylinder head 2 and the lower base 1 can be installed together by fasteners 3. For products with unqualified shaft hole 4 or cylinder hole 5 position, the accuracy requirements can be met by replacing the lower base 1 or the cylinder head 2 separately, thereby improving the utilization rate of materials.

[0046] During assembly, the crankshaft connecting rod 13 and piston are assembled first. Then, the crankshaft connecting rod 13 and piston are installed into the shaft hole 4 and cylinder hole 5 respectively. Finally, the lower base 1 and cylinder head 2 are installed together, so that there is no need to open the clearance groove on the cylinder head 2, which can increase the sealing band between the piston and the cylinder head 2 and increase the cooling capacity.

[0047] Since the bottom part of the back plate 201 abuts against the first positioning groove 601, the lower base 1 can provide more support for the cylinder head 2 and the cylinder, reducing the requirements for the connection strength between the fastener 3 and the lower base 1. Since the bottom part of the back plate 201 is exposed outside the first positioning groove 601, the back plate 201 can be more easily connected to the lower base 1. At the same time, the first positioning groove 601 and the second positioning groove 602 are used for positioning when installing the back plate 201 and the piston cylinder 202, respectively, so as to facilitate determining the installation position of the cylinder head 2 and prevent the cylinder head 2 from moving arbitrarily during the installation process.

[0048] It should be noted that the piston cylinder 202 is used to facilitate the installation of the piston, allowing the piston to slide normally within the piston cylinder 202. The clearance groove is used to allow the crankshaft connecting rod 13 to slide when it is installed. Without the clearance groove, the sealing zone between the piston and the cylinder head 2 can be increased, thus increasing the cooling capacity. The shaft hole 4 is used to facilitate the sliding of the crankshaft connecting rod 13 within it, thereby facilitating the crankshaft connecting rod 13 to drive the piston to move.

[0049] In this embodiment, a notch 204 is provided at the bottom of the back plate 201. The notch 204 abuts against the first positioning groove 601. A plurality of connecting holes 7 are provided in the back plate 201. The lower base 1 includes a triangular part 101 and a long strip part 102 installed on the corner of the triangular part 101 away from the cylinder head 2. The first positioning groove 601 is provided at the edge of the triangular part 101 away from the long strip part 102.

[0050] In the above scheme, the notch 204 can avoid the back plate 201 when it abuts against the first positioning groove 601, so that the back plate 201 can partially abut against the first positioning groove 601. The connecting hole 7 is used to facilitate the installation of the cylinder on the back plate 201. After aligning the cylinder with the back plate 201, the bolt is threaded through the cylinder and connected to the connecting hole 7, which can realize the installation of the cylinder. By designing the lower base 1 as a triangular part 101 and a long strip part 102, its structure is simpler than the traditional four-corner support, requires less material, and the lower base 1 only needs to occupy less space.

[0051] In this embodiment, the bottom side of the lower base 1 is mounted with three support legs 8, which are arranged in a triangular array. The lower base 1 and the cylinder head 2 are both powder metallurgy castings. The lower base 1 has three first threaded holes 9, and the positions of the first threaded holes 9 correspond to the positions of the axes of the support legs 8.

[0052] In the above scheme, since the lower base 1 and cylinder head 2 are processed by powder metallurgy, the bottom surface of the cylinder head 2 and the top surface of the lower base 1 have high precision after forming. There is no need to process them again, and the cylinder head 2 can be directly installed on the lower base 1, saving processing costs. The first threaded hole 9 is used to install the motor stator. After the motor stator is abutted against the lower base 1, the motor stator is fixed to the support leg 8 by bolt thread connection in the first threaded hole 9. The support leg 8 is used to connect the motor, and at the same time, it can ensure that the overall structure of the cylinder seat does not fully contact the motor, so that the cylinder seat has a certain vibration gap, thereby playing a buffering and shock absorption effect, and at the same time facilitating the connection between the entire cylinder seat and the motor.

[0053] In this embodiment, a through hole 10 is provided on the cylinder head 2. The cylinder head 2 also includes connecting blocks 203 installed on both sides of the piston cylinder 202. The through hole 10 is provided on the corresponding connecting block 203. A second threaded hole 11 corresponding to the position of the through hole 10 is provided on the lower base 1. The fastener 3 passes through the through hole 10 and is threaded into the second threaded hole 11.

[0054] In the above scheme, the fastener 3 is a bolt, and the cylinder head 2 is installed on the lower base 1 through the through hole 10 and the second threaded hole 11. There is no need to use the first threaded hole 9 for connection, so the motor stator can be fixed by using the first threaded hole 9. Example 2

[0055] Please refer to Figures 8 to 9 The difference between this embodiment and the first embodiment is that two ear plates 12 are installed on both sides of the cylinder head 2, and the fastener 3 passes through the ear plate 12 and is threaded onto the lower base 1. A third threaded hole 14 is opened at the bottom of the support leg 8, and the third threaded hole 14 is connected to the first threaded hole 9.

[0056] In the above scheme, the fastener 3 is a bolt, and the motor stator is installed at the bottom of the support leg 8. The bolt thread is used to fix the motor stator in the third threaded hole 14. This installation method eliminates the need to install connecting blocks 203 on both sides of the piston cylinder 202, so more connecting holes 7 can be opened on the back plate 201 for the cylinder to be fixedly installed, thus improving the stability of the cylinder installation.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A split-type cylinder base for a reciprocating piston compressor, characterized in that, Includes a lower base (1), the lower base (1) has a positioning groove (6) on its top, a cylinder head (2) is abutted in the positioning groove (6), the cylinder head (2) is mounted on the lower base (1) by fasteners (3), the lower base (1) has a shaft hole (4), and the cylinder head (2) has a cylinder hole (5). The cylinder head (2) includes a back plate (201) facing away from the shaft hole (4) and a piston cylinder (202) mounted on the back plate (201) and facing the shaft hole (4), with the cylinder hole (5) opened on the piston cylinder (202); The positioning groove (6) includes a first positioning groove (601) opened at the edge of the lower base (1), the bottom part of the back plate (201) abuts against the first positioning groove (601), the side wall of the first positioning groove (601) away from the edge is connected to a second positioning groove (602), and the bottom end of the piston cylinder (202) is completely abutted in the second positioning groove (602).

2. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The bottom end of the back plate (201) is provided with a notch (204), which abuts against the first positioning groove (601).

3. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The back plate (201) has multiple connection holes (7).

4. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The lower base (1) includes a triangular portion (101) and a long strip portion (102) mounted on a corner of the triangular portion (101) away from the cylinder head (2).

5. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The lower base (1) is mounted on three support legs (8) on its bottom side, and the three support legs (8) are arranged in a triangular array.

6. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, Both the lower base (1) and the cylinder head (2) are powder metallurgy castings.

7. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The lower base (1) has three first threaded holes (9).

8. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, The cylinder head (2) has a through hole (10), and the lower base (1) has a second threaded hole (11) corresponding to the position of the through hole (10). The fastener (3) passes through the through hole (10) and is threaded into the second threaded hole (11).

9. The reciprocating piston compressor split cylinder base according to claim 1, characterized in that, Two ear plates (12) are installed on both sides of the cylinder head (2), and the fastener (3) passes through the ear plates (12) and is threaded onto the lower base (1).

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