Scroll plate pouring system of constant-speed air conditioner compressor

Abstract

The invention discloses a scroll plate pouring system of a constant-speed air conditioner compressor, and belongs to the technical field of pouring equipment. The device comprises a sprue cup and a sprue connected with the sprue cup, the two sides of the sprue are connected with a plurality of lower cross gates in an extending mode, the single scroll plate loam core is placed in an X shape, two supporting part cavities in the bottom of the scroll plate loam core are each provided with an inner sprue, and the inner sprues are obliquely arranged and communicated with the lower cross gates; a feeding pouring gate is communicated with the lower transverse pouring gate, a feeding cavity is formed in the top of the feeding pouring gate, and a riser communicated with the feeding cavity is formed in one supporting part cavity in the top of the scroll plate loam core. According to the invention, the pouring system is improved, so that a scroll plate casting with a special structure can be poured, and the pouring quality is ensured while one-mold multi-piece pouring is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of casting equipment, and more specifically, relates to a scroll casting system for a constant-speed air-conditioning compressor. Background Art

[0002] A constant-speed air conditioner is an air conditioner whose internal compressor motor has a constant speed and whose temperature is adjusted by turning the compressor on and off. The compressor is one of the core components of a constant-speed air conditioner. There are many types of compressors, among which the scroll compressor is a compressor with a compressible volume composed of a fixed involute scroll disk and an eccentrically rotating involute motion scroll disk, that is, it is composed of two moving and stationary scroll disks of double-function equation type lines that engage with each other. During the working process of suction, compression, and exhaust, the stationary disk is fixed on the frame, and the moving disk is driven by the eccentric shaft and restrained by the anti-rotation mechanism, rotating in a plane with a very small radius around the center of the stationary disk base circle. The gas is sucked into the periphery of the stationary disk through the air filter element. As the eccentric shaft rotates, the gas is gradually compressed in several crescent-shaped compression chambers formed by the engagement of the moving and stationary disks, and then continuously discharged from the axial hole of the central component of the stationary disk.

[0003] At present, the static scroll of the compressor is generally produced by casting technology. However, due to the large difference between the static scroll structure of the fixed-speed air-conditioning compressor and the casting shape of the variable-frequency air-conditioning, it is often difficult to produce high-quality products ideally using conventional casting systems.

[0004] The Chinese patent application number is: CN201810917875.6, and the patent document with the publication date of October 19, 2018 discloses a scroll electric compressor stator casting mold, including a workbench, four guide pillars are arranged on the workbench, the upper end of the guide pillars is fixedly connected to a top plate, the lower end of the top plate is provided with an insulation block, an upper mold is arranged below the insulation block, a lower mold is arranged below the upper mold, and the four corners of the lower mold are sleeved on the guide pillars, a screw is arranged on one side of the lower mold, a slider is connected to the screw, one end of the slider is fixedly connected to the lower mold, the upper end of the screw is movably connected to the top plate through a bearing, the lower end of the screw is connected to a drive motor through a rolling bearing, and the drive motor is arranged below the workbench, and two support assemblies are arranged on the workbench, each support assembly includes three support rods, the upper end of the support rod is connected to the bottom plate of the lower mold casting cavity, the support rod passes through the lower mold, and two casting cavity vortex baffles are arranged on the lower mold, and a casting cavity vortex baffle and a lower mold casting cavity bottom plate form a casting cavity.

[0005] This solution reduces the risk of manual removal by improving the equipment, but the number of castings that can be cast at a time is limited, which is difficult to meet the production of large quantities of products, and the casting efficiency is not high.

[0006] The Chinese patent application number is: CN201510629811.2, and the patent document with the publication date of December 23, 2015 discloses a solar roof blank casting mold and a casting process. The solar roof blank casting mold includes a bottom plate; a straight gate is arranged on the bottom plate; and a roof plate model connected to the straight gate through an inner gate; a steel ring and a sand core are embedded in the roof plate model; the roof plate model is provided with a riser for shrinkage compensation, and the keyway blank and the casting blank are cast together and then processed together, so that the previous 2-step processing + assembly is changed to 1-step processing, thereby improving production efficiency.

[0007] Although this solution can achieve the preparation of multiple parts with one mold, its method of directly pouring through a single inner gate affects the quality of the product poured out of the casting mold, and is prone to problems such as pores.

[0008] That is, the existing pouring system is difficult to guarantee the pouring quality when realizing the pouring of multiple parts in one mold, especially for some scroll castings with special structures. Figure 1 The scroll casting of the shape shown has a unit weight of 2.3kg and has four supports on the outer circle, with a rib connecting two of the supports. The casting cannot be arranged in a cross shape during the process, as the top of the support is prone to air holes and insufficient pouring. The ribs between the supports cannot be placed at the top, as they are thin and prone to air holes and cold shuts. The existing pouring system, such as the above two solutions, is used for Figure 1 When preparing castings of the shape shown, it is difficult to ensure the casting quality while achieving multiple castings in one mold. Summary of the invention

[0009] 1. Problems to be solved

[0010] In view of the problem that the existing casting system is difficult to ensure the casting quality while achieving one-mold multiple-piece casting for the preparation of some special-structured scroll disk castings, the present invention provides a scroll disk casting system for a constant-speed air-conditioning compressor. By improving the casting system, the casting quality can be guaranteed while achieving one-mold multiple-piece casting for the casting of scroll disk castings with special structures.

[0011] 2. Technical solution

[0012] To solve the above problems, the present invention adopts the following technical solutions.

[0013] A vortex disk casting system for a constant speed air-conditioning compressor comprises a pouring cup and a sprue connected to the pouring cup, a plurality of lower cross runners are extended and connected on both sides of the sprue, a single vortex disk mud core is arranged in an X shape, and two supporting part cavities at its bottom are respectively provided with an inner gate, and the inner gates are arranged obliquely and connected to the lower cross runner; a feeding runner is connected to the lower cross runner, and a feeding cavity is provided on the top of the feeding runner, and a riser connected to the feeding cavity is provided in one of the supporting part cavities at the top of the vortex disk mud core.

[0014] As a further improvement of the technical solution, it also includes an upper cross runner; the bottom of the pouring cup is connected to the upper cross runner, and the top of the straight runner is connected to the upper cross runner.

[0015] As a further improvement of the technical solution, a slag avoidance sheet is provided at the connection between the upper horizontal runner and the straight runner.

[0016] As a further improvement of the technical solution, a second slag avoidance sheet is provided at the connection between the lower horizontal runner and the straight runner.

[0017] As a further improvement of the technical solution, a slag avoidance sheet three is provided at the connection between the lower cross runner and the shrinkage feeding runner.

[0018] As a further improvement of the technical solution, an inner gate sheet is provided at the connection between the inner gate and the lower runner.

[0019] As a further improvement of the technical solution, a riser sheet is provided at the connection between the riser and the feeding cavity.

[0020] As a further improvement of the technical solution, a slag collecting overlap structure that is laterally bent in the shape of a U-shaped channel is provided on the straight runner.

[0021] As a further improvement of the technical solution, an auxiliary separation block is provided at one end of the riser.

[0022] As a further improvement of the technical solution, the riser is connected to the feeding cavity through a flow limiting groove.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention provides a scroll casting system for a constant-speed air-conditioning compressor. For the casting of a scroll casting with a special structure having four support parts, a side-shaped water entry and a riser shrinkage compensation method are adopted to solve the problem that the casting cannot be arranged in a cross shape and the connecting ribs between the supports cannot be placed at the top. The water is entered from the bottom to the inner side of the mud core in both directions. The overall water entry is stable. Compared with the conventional water entry method, it has a better slag avoidance effect, more comprehensive injection of the mud core, and reduces the probability of air holes and insufficient pouring. In particular, it is different from the conventional direct The method of feeding the riser while entering the water, extending the feeding runner upward from the lower cross runner, so that after the mud core enters the water for a period of time and initially solidifies, the molten iron fills the feeding cavity and then the mud core that has entered the water to the upper part is fed obliquely from the top. Compared with the method of entering the water and feeding at the same time, this structure can feed the mud core cavity after the molten iron that has entered the water solidifies to a certain extent, thereby eliminating the shrinkage and shrinkage holes caused by solidification, and avoiding the situation where some shrinkage and lock holes cannot be eliminated due to the synchronous solidification of the molten iron when feeding and entering the water are carried out simultaneously;

[0026] (2) The present invention provides a scroll casting system for a constant speed air-conditioning compressor, wherein an upper horizontal runner is provided between the sprue and the pouring cup, which can play a certain role in blocking slag and improving the casting quality;

[0027] (3) The present invention provides a scroll casting system for a constant speed air-conditioning compressor, wherein thin sheets are provided at the connection between the upper runner and the sprue, the connection between the lower runner and the sprue, the connection between the lower runner and the feeding runner, the connection between the inner gate and the lower runner, and the connection between the riser and the feeding cavity, so that the molten iron passing through the thin sheets can be filtered. By filtering the molten iron passing through different positions multiple times, the purity of the molten iron can be effectively improved, thereby improving the casting quality.

[0028] (4) The present invention provides a vortex casting system for a constant speed air-conditioning compressor, wherein a slag collecting overlap structure with a sideways bending in a U-shaped channel shape is provided on the sprue, which can increase the slow flow of molten iron, reduce the molten iron pressure, and in the process, pull the residue upward to improve the purity of the molten iron flowing into the mud core, thereby improving the casting quality;

[0029] (5) The present invention provides a scroll casting system for a constant-speed air-conditioning compressor, wherein one end of the riser is provided with an auxiliary separation block, which can be inserted into the separation block by separating pliers after the molten iron is cooled and solidified, so that the riser and the casting can be quickly separated, thereby improving the efficiency of removing the parts;

[0030] (6) In a scroll casting system for a constant-speed air-conditioning compressor of the present invention, the riser and the shrinkage-feeding cavity are connected via a flow-limiting groove, and the flow-limiting groove is a reverse overlap structure, which can effectively improve the appearance defects of the casting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of a casting made from the vortex disk mud core of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the scroll plate pouring system of the present invention;

[0033] In the figure: 1. gate cup; 2. sprue; 3. lower runner; 4. feeding runner; 5. vortex disk mud core; 6. inner gate; 7. feeding cavity; 8. riser; 9. support cavity; 10. upper runner; 11. slag avoidance sheet 1; 12. slag avoidance sheet 2; 13. slag avoidance sheet 3; 14. inner gate sheet; 15. riser sheet; 16. slag collecting overlap structure. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present invention are described in detail below. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from the spirit and scope of the present invention. The more detailed description of the embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely for illustration and does not limit the description of the features and characteristics of the present invention, in order to propose the best mode for performing the present invention, and is sufficient to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0035] Example 1

[0036] A scroll casting system for a constant speed air conditioning compressor is used for casting and molding of castings, especially for scroll castings with special structures, such as Figure 1 The static scroll disk of the fixed-speed air-conditioning compressor shown in the figure has difficulty in achieving multiple-piece casting in one mold while ensuring the casting quality using a conventional casting system. The casting system of this embodiment has been improved to address this problem. Its specific structure and technical effects are described in detail below.

[0037] like Figure 2 As shown, the pouring system includes a pouring cup 1, the bottom of the pouring cup 1 is connected to an upper runner 10, the upper runner 10 is connected to the top of a straight runner 2, and a plurality of lower runners 3 are extended and connected on both sides of the straight runner 2. By arranging the upper runner 10 between the straight runner 2 and the pouring cup 1, a certain slag blocking effect can be achieved, thereby improving the pouring quality.

[0038] A single vortex disk mud core 5 is arranged in an X shape, and the two support cavities 9 at the bottom are respectively provided with an inner gate 6, which is arranged obliquely and connected to the lower runner 3. At the same time, the lower runner 3 is connected to the feeding runner 4, and the top of the feeding runner 4 is provided with a feeding cavity 7. One of the support cavities 9 at the top of the vortex disk mud core 5 is provided with a riser 8 connected to the feeding cavity 7. In this embodiment, at least two rows of lower runners 3 are extended and connected on both sides of the sprue 2, and each lower runner 3 is installed with at least one vortex disk mud core 5 arranged in an X shape.

[0039] In this pouring system, for the pouring of the scroll disk casting with a special structure of four supporting parts, the side eight-shaped water entry and riser shrinkage compensation method are adopted to solve the problem that the casting cannot be arranged in a cross shape and the connecting ribs between the supports cannot be placed at the top. The system enters water from the bottom to the inside of the mud core in both directions, and the overall water entry is stable. Compared with the conventional water entry method, it has a better slag avoidance effect, more comprehensive injection of the mud core, and reduces the probability of air holes and insufficient pouring. In particular, this system is different from the conventional method of directly feeding the riser at the same time as the water is put into the water. A feeding runner 4 is extended upward from the lower cross runner 3, so that after the mud core is put into the water for a period of time and initially solidified, the molten iron fills the feeding cavity 7 and then the mud core that has been put into the water to the upper part is fed obliquely from above. Compared with the method of simultaneously putting into the water and feeding, this structure can feed the mud core cavity after the molten iron that has been put into the water solidifies to a certain extent, thereby eliminating the shrinkage and shrinkage holes caused by solidification, and avoiding the situation where the molten iron solidifies synchronously when feeding and water are carried out simultaneously, resulting in some shrinkage and keyholes that cannot be eliminated.

[0040] At the same time, a slag-avoiding sheet 11 is provided at the connection between the upper runner 10 and the sprue 2, a slag-avoiding sheet 2 is provided at the connection between the lower runner 3 and the sprue 2, a slag-avoiding sheet 3 13 is provided at the connection between the lower runner 3 and the feeding runner 4, an inner gate sheet 14 is provided at the connection between the entgate 6 and the lower runner 3, and a riser sheet 15 is provided at the connection between the riser 8 and the feeding cavity 7. By providing sheets at different positions of the casting system, the molten iron passing through the place can be filtered, and multiple filtrations of the molten iron flowing through different positions can effectively improve the purity of the molten iron, thereby improving the casting quality.

[0041] In addition, the sprue 2 is provided with a slag collecting overlap structure 16 that is laterally bent in the shape of a U-shaped channel, which can increase the slow flow of molten iron, reduce the pressure of molten iron, and in the process, pull the residue upward to increase the purity of the molten iron flowing into the mud core, thereby improving the casting quality. An auxiliary separation block is provided at one end of the riser 8, and after the molten iron is cooled and solidified, a separation pliers can be inserted into the separation block to quickly separate the riser and the casting, thereby improving the efficiency of removing the parts. The riser 8 is connected to the shrinkage-feeding cavity 7 through a flow limiting groove, which is a reverse overlap structure and can effectively improve the appearance defects on the surface of the casting.

[0042] In summary, the scroll casting system of a constant-speed air-conditioning compressor of this embodiment can achieve the casting of scroll castings with special structures by improving the casting system, while ensuring the casting quality while realizing one-mold multi-piece casting.

[0043] The examples described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should all fall within the protection scope of the present invention.

Claims

1. A scroll casting system for a constant speed air-conditioning compressor, comprising a pouring cup (1) and a sprue (2) connected to the pouring cup (1), wherein both sides of the sprue (2) are extended and connected to a plurality of lower runners (3), characterized in that: A single vortex disk mud core (5) is arranged in an X shape, and two support cavities (9) at the bottom thereof are respectively provided with an inner gate (6), and the inner gate (6) is arranged obliquely and connected to the lower cross runner (3); the lower cross runner (3) is connected to a shrinkage feeding runner (4), and a shrinkage feeding cavity (7) is provided at the top of the shrinkage feeding runner (4); one of the support cavities (9) at the top of the vortex disk mud core (5) is provided with a riser (8) connected to the shrinkage feeding cavity (7).

2. The scroll casting system for a constant speed air-conditioning compressor according to claim 1, characterized in that: It also includes an upper runner (10); the bottom of the pouring cup (1) is connected to the upper runner (10), and the top of the sprue (2) is connected to the upper runner (10).

3. The scroll casting system for a constant speed air-conditioning compressor according to claim 2, characterized in that: A slag avoidance sheet (11) is provided at the connection between the upper horizontal runner (10) and the straight runner (2).

4. The scroll casting system for a constant speed air-conditioning compressor according to claim 1, characterized in that: A second slag avoidance sheet (12) is provided at the connection between the lower horizontal runner (3) and the straight runner (2).

5. The scroll casting system for a constant speed air-conditioning compressor according to claim 1, characterized in that: A slag avoidance sheet three (13) is provided at the connection between the lower horizontal runner (3) and the shrinkage feeding runner (4).

6. The scroll casting system for a constant speed air-conditioning compressor according to claim 1, characterized in that: An ingate sheet (14) is provided at the connection between the ingate (6) and the lower runner (3).

7. The scroll casting system for a constant speed air-conditioning compressor according to claim 1, characterized in that: A riser sheet (15) is provided at the connection between the riser (8) and the feeding cavity (7).

8. A scroll casting system for a constant speed air-conditioning compressor according to any one of claims 1 to 7, characterized in that: The sprue (2) is provided with a slag collecting overlap structure (16) which is laterally bent and shaped like a U-shaped channel.

9. A scroll casting system for a constant speed air-conditioning compressor according to any one of claims 1 to 7, characterized in that: An auxiliary separation block is provided at one end of the riser (8).

10. A scroll casting system for a constant speed air-conditioning compressor according to any one of claims 1 to 7, characterized in that: The riser (8) is connected to the feeding cavity (7) via a flow limiting groove.

Images