Balance block and manufacturing method thereof

Abstract

The invention relates to the technical field of compressor manufacturing, and provides a balance block and a manufacturing method thereof, and the balance block comprises a base and a balancing weight. Wherein the base comprises an annular base body, and the annular base body is provided with a fixing part; the balancing weight is provided with a mounting part, and the balancing weight is detachably connected with the fixing part through the mounting part. The manufacturing method of the balance block comprises the following steps: mixing materials, respectively pressing the base and the balancing weight, splicing, sintering, carrying out vibration grinding, detecting and cleaning to remove rust. The balancing weight and the base are detachably connected, when the balancing weight is manufactured, the balancing weight and the base can be independently manufactured and then assembled, after the balancing weight and the base are detached, the structure of the balancing weight and the structure of the base are simpler than the structure of the assembled balancing weight and the base, the balancing weight and the base can be directly formed in production, the balancing weight can be obtained through assembly, and the production efficiency is improved. Therefore, the balance block with a complicated structure can be formed by using a powder metallurgy high manganese steel material, so that the production process is prevented from being greatly changed, the production efficiency of the balance block is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressor manufacturing, and in particular to a balancing block and a manufacturing method thereof. Background Art

[0002] Common refrigeration equipment generally has compressors, such as new energy vehicle air conditioners, household air conditioners, refrigerators, etc.

[0003] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas and is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it through the motor-driven piston, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, thus realizing the refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption).

[0004] When the compressor is running, the internal shaft often loses stability due to high-speed rotation. In order to solve the imbalance problem of the compressor, a balancing block is set at the corresponding position of the compressor. The balancing block has the effect of balancing, reducing noise and vibration on the compressor.

[0005] In the past, the manufacturing of balance blocks would use the traditional casting method. Based on energy conservation, emission reduction and environmental protection requirements, balance blocks are currently usually manufactured using powder metallurgy technology, which produces metal powder or a mixture of metal powders through mixing, molding and sintering processes. Traditional powder metallurgy iron-based metals will produce magnetic interference to the compressor due to their magnetic properties, and the cost of powder metallurgy copper metal is high, so now powder metallurgy high-manganese steel is generally used to manufacture balance blocks, which not only meets the requirements of low magnetic properties of the material, but also ensures that the cost is within a reasonable range.

[0006] However, when manufacturing balance blocks, for balance blocks with complex structures, it is impossible to form the balance blocks during production when using powder metallurgy high manganese steel materials. It is necessary to change the preset specifications of the balance blocks or replace other powder metallurgy materials, which makes it difficult to meet the preset specifications of the balance blocks and significantly changes the production process, resulting in low production efficiency and high production costs of the balance blocks. Summary of the invention

[0007] The present invention provides a balancing block, which is used to solve the problem in the related art that when a balancing block with a complex structure is manufactured using a powder metallurgy high manganese steel material, the balancing block cannot be formed during production, resulting in low production efficiency and high production cost of the balancing block.

[0008] The invention also provides a method for manufacturing a balancing weight.

[0009] The present invention provides a balancing weight, comprising:

[0010] The base comprises an annular base, wherein the annular base is provided with a fixing portion;

[0011] The counterweight block is provided with a mounting portion, and the counterweight block is detachably connected to the fixing portion through the mounting portion.

[0012] The balancing block provided by the present invention has the beneficial effect that: the counterweight block and the base are detachably connected, and when manufacturing the balancing block, the counterweight block and the base can be manufactured separately and then assembled. After the counterweight block and the base are disassembled and separated, the structures of the counterweight block and the base are simpler than the structure after the two are assembled. When the counterweight block and the base are manufactured separately using powder metallurgy high manganese steel material, since the structures of the counterweight block and the base are simple, the powder metallurgy high manganese steel material can be used to directly form the counterweight block and the base during production. The formed counterweight block and the base can be assembled to obtain a balancing block, so that a balancing block with a complex structure can also be formed during production using powder metallurgy high manganese steel material, which can meet the preset specifications and material requirements of the balancing block. At the same time, it can avoid significant changes in the production process of the balancing block, thereby improving the production efficiency of the balancing block and reducing production costs.

[0013] The manufacturing method of the balance weight provided by the present invention can also be used to produce the balance weight provided by the present invention, and can also form balance weights with complex structures. The manufactured balance weights can also meet the preset specifications and material requirements of the balance weights, which can avoid major changes in the balance weight production process, improve the production efficiency of the balance weights, and reduce production costs.

[0014] In some embodiments, the mounting portion includes a first boss and a second boss that are symmetrical to each other, and the first boss and the second boss protrude along the axial direction of the counterweight block, thereby making the structure of the counterweight block simpler and making it faster to assemble the counterweight block and the base.

[0015] In some embodiments, the fixing portion includes a first fixing hole and a second fixing hole that are symmetrical to each other, the first fixing hole and the first boss are interference fit, and the second fixing hole and the second boss are interference fit. Thus, the structure of the base is simpler, and the base and the counterweight are assembled more quickly and more firmly.

[0016] In some embodiments, the counterweight is in an arc shape, and the counterweight is provided with an arc slope, which is tangent to the outer arc edge of the counterweight, thereby reducing the wind resistance of the balance block.

[0017] In some embodiments, a rounded corner is provided at the end of the counterweight, thereby further reducing wind resistance.

[0018] In some embodiments, the base further comprises a first assembly portion and a second assembly portion which are symmetrical to each other, the first assembly portion and the second assembly portion are arranged on the annular base, and the first assembly portion and the second assembly portion are respectively provided with a first through hole and a second through hole which penetrate the annular base, thereby preventing the annular base from being squeezed and deformed.

[0019] In some embodiments, the material of the balancing block is powder metallurgy high manganese steel, thereby reducing magnetic interference to the compressor.

[0020] The present invention also provides a method for manufacturing a balancing weight, comprising the following steps:

[0021] The first step is mixing, placing the powder metallurgy high manganese steel and additives in a mixing device for mixing;

[0022] The second step is to press the base, and press the base on the first powder metallurgy pressing equipment;

[0023] The third step is to press the counterweight block on the second powder metallurgy pressing equipment;

[0024] Step 4: Assemble the base and counterweight;

[0025] Step 5: Sintering the assembly of the base and the counterweight;

[0026] Step 6: The sintered product is vibrated and ground;

[0027] Step 7: Product testing;

[0028] Step 8: Cleaning and rust prevention.

[0029] Thus, a substantial change in the production process of the balancing block can be avoided, thereby improving the production efficiency of the balancing block and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 One of the overall structural schematic diagrams of the balancing weight provided in the embodiment of the present invention;

[0031] Figure 2 The second schematic diagram of the overall structure of the balancing weight provided by the embodiment of the present invention;

[0032] Figure 3 An exploded schematic diagram of a balancing weight provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of a counterweight block of a balancing block provided in an embodiment of the present invention;

[0034] Figure 5 A schematic flow chart of a method for manufacturing a balancing weight provided in an embodiment of the present invention.

[0035] Reference numerals

[0036] 100, base; 110, annular base; 111, fixing portion; 1111, first fixing hole; 1112, second fixing hole; 112, first through hole; 113, second through hole; 120, first assembly portion; 130, second assembly portion;

[0037] 200, counterweight; 210, mounting portion; 211, first boss; 212, second boss; 220, arc slope; 230, fillet portion; 231, first arc surface; 232, second arc surface. DETAILED DESCRIPTION

[0038] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present application. It should be understood that the terms first, second, third, etc. may also be used to describe various information herein, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information (first boss) may also be referred to as the second information (second boss), and similarly, the second information (second boss) may also be referred to as the first information (first boss). In this specification, the schematic representation of the above terms does not necessarily have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without contradicting each other.

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] See also Figures 1 to 4 An embodiment of the present invention provides a balancing block, which includes a base 100 and a counterweight 200 .

[0041] The base 100 includes an annular base 110 , and the annular base 110 is provided with a fixing portion 111 .

[0042] The counterweight block 200 is provided with a mounting portion 210 , and the counterweight block 200 is detachably connected to the fixing portion 111 via the mounting portion 210 .

[0043] It can be understood that the balancing block provided in the embodiment of the present invention is detachably connected to the base 100 through the counterweight 200. When manufacturing the balancing block, the counterweight 200 and the base 100 can be manufactured separately and then assembled. After the counterweight 200 and the base 100 are disassembled and separated, the structures of the counterweight 200 and the base 100 are simpler than the structure after the two are assembled. When the counterweight 200 and the base 100 are manufactured separately using powder metallurgy high manganese steel, since the structures of the counterweight 200 and the base 100 are simple, the powder metallurgy high manganese steel can be used to directly mold the counterweight 200 and the base 100 during production. After the molded counterweight 200 and the base 100 are assembled, a balancing block can be obtained, so that a balancing block with a complex structure can be molded during production using powder metallurgy high manganese steel, which can meet the preset specifications and material requirements of the balancing block. At the same time, it can avoid significant changes in the production process of the balancing block, thereby improving the production efficiency of the balancing block and reducing the production cost.

[0044] See also Figure 3 and Figure 4 In some embodiments of the present invention, the mounting portion 210 includes a first boss 211 and a second boss 212 that are symmetrical to each other, and the first boss 211 and the second boss 212 protrude along the axial direction of the counterweight 200. Specifically, the first boss 211 and the second boss 212 may be cylindrical bosses.

[0045] In some embodiments of the present invention, the fixing portion 111 includes a first fixing hole 1111 and a second fixing hole 1112 that are symmetrical to each other, the first fixing hole 1111 is interference-fitted with the first boss 211, and the second fixing hole 1112 is interference-fitted with the second boss 212. The counterweight 200 is detachably connected to the annular base 110 through interference fit, which can make the structure of the counterweight 200 and the base 100 simpler, and the counterweight 200 and the base 100 can be assembled more quickly and more firmly.

[0046] See also Figure 1 In some embodiments of the present invention, the counterweight 200 is in an arc shape, and the counterweight 200 is provided with an arc slope 220, and the arc slope 220 is tangent to the outer arc edge of the counterweight 200. The counterweight 200 is arranged in an arc shape, so that the counterweight 200 can be consistent with the ring shape of the annular base 110 of the base 100, and the arc of the arc counterweight 200 and the arc of the annular base 110 can be overlapped, which can improve the balancing effect of the balance block. In addition, the arc slope 220 is arranged on the outer edge of the arc counterweight 200, and when the balance block rotates, the wind can slide through the arc slope 220, and the arc slope 220 can reduce the wind resistance of the balance block.

[0047] See also Figure 1In order to further reduce the wind resistance when the balancing block is working, in some embodiments of the present invention, a rounded corner portion 230 is further provided at the end of the counterweight block 200. Specifically, the rounded corner portion 230 can be formed by cutting the two ends of the counterweight block 200, that is, a first arc surface 231 and a second arc surface 232 are respectively provided at the first end and the second end of the counterweight block 200, and the first arc surface 231 and the second arc surface 232 are smoothly transitioned with the arc inclined surface 220. When the balancing block rotates, the wind slides over the first arc surface 231 or the second arc surface 232, and the rounded corner can reduce the wind resistance.

[0048] See also Figure 1 and Figure 2 In some embodiments of the present invention, the base 100 further includes a first assembly portion 120 and a second assembly portion 130 which are symmetrical to each other. The first assembly portion 120 and the second assembly portion 130 are arranged on the annular base 110. The first assembly portion 120 and the second assembly portion 130 are respectively provided with a first through hole 112 and a second through hole 113 which penetrate the annular base 110. Specifically, the first assembly portion 120 and the second assembly portion 130 may be a truncated cone member (not shown in the accompanying drawings), and the annular base 110 may be a thin ring member. Two symmetrical truncated cone members are arranged on the thin ring member, and the two truncated cone members may be integrally formed with the thin ring member. The first through hole 112 and the second through hole 113 penetrate the thin ring member along the axis of the two truncated cone members, respectively. When the annular base 110 (i.e. the thin ring member) is assembled and fixed to the object to be balanced, the first assembly portion 120 and the second assembly portion 130 (i.e. the two truncated cones) may bear part of the extrusion force to prevent the annular base 110 (i.e. the thin ring member) from being squeezed and deformed by the fixing member.

[0049] In some embodiments of the present invention, in order to reduce the magnetism of the balancing block, the material of the balancing block can be powder metallurgy high manganese steel, which can reduce the magnetic interference of the balancing block on the object to be balanced. For example, when the balancing block is used to balance a compressor, the balancing block made of powder metallurgy high manganese steel can reduce the magnetic interference to the compressor.

[0050] See also Figures 1 to 5 The present invention also provides a method for manufacturing a balancing weight, comprising the following steps:

[0051] The first step: mixing, placing the powder metallurgy high manganese steel and additives in a mixing device for mixing. Specifically, the premixed powder metallurgy high manganese steel base powder and additives are poured into a mixer and mixed for 1 to 2 hours and then taken out for standby. Among them, the additive can be 8% to 23% of the weight of the powder metallurgy high manganese steel electrolytic copper powder plus 0.6% to 1.5% of the weight of the powder metallurgy high manganese steel metallurgy special lubricant. In this embodiment, the additive is a mixture of 15% electrolytic copper powder and 1% high manganese steel metallurgy special lubricant. The powder metallurgy high manganese steel base powder and additives can be mixed for 1.5 hours. Adding electrolytic copper powder can reduce the pressure during pressing, increase the density of the pressed green body, generate a liquid phase during high-temperature sintering, and increase the density of the sintered body. Adding a special lubricant for high manganese steel metallurgical powder can reduce the friction between the powder particles and the inner wall of the mold, reduce the friction between the powder particles and the powder particles, and improve the strength of the green body. Among them, the special lubricant for high manganese steel metallurgy is zinc stearate and / or lithium stearate. In this embodiment, the special lubricant for high manganese steel metallurgy is zinc stearate.

[0052] The second step is to press the base 100 on the first powder metallurgy pressing device. Specifically, the first powder metallurgy pressing device can be a first pressing machine, and the forming mold of the base 100 is installed on the first pressing machine (the first pressing machine can be a 260T mechanical forming press), and the mixed material in the first step is loaded into the powder hopper of the first pressing machine. By adjusting the upper and lower punches and the filling height of the first pressing machine, a product that meets the process requirements (such as density, weight, height, etc.) is pressed out, that is, the base 100. The base 100 will slide to the receiving turntable through the slide of the first pressing machine, and the base 100 will be manually collected. During pressing, the pressing temperature does not exceed 150°C. For example, in some embodiments, the pressing temperature can be 100°C.

[0053] The third step is to press the counterweight 200 on the second powder metallurgy pressing equipment. Specifically, the second powder metallurgy pressing equipment can be a second pressing machine, and the forming mold of the counterweight 200 is installed on the second pressing machine (the second pressing machine can be a 260T mechanical forming press), and the mixed material in the first step is loaded into the powder hopper of the second pressing machine. By adjusting the upper and lower punches and the filling height of the second pressing machine, a product that meets the process requirements (such as density, weight, height, etc.) is pressed out, that is, the counterweight 200. The counterweight 200 will slide to the material receiving turntable through the slide of the second pressing machine, and the base 100 will be manually collected. During pressing, the pressing temperature does not exceed 150°C. For example, in some embodiments, the pressing temperature can be 100°C.

[0054] The fourth step is to assemble the base 100 and the counterweight 200. Specifically, the operator manually assembles the counterweight 200 and the base 100.

[0055] The fifth step is to sinter the assembly of the base 100 and the counterweight 200. Specifically, the assembled counterweight 200 and the base 100 are placed on a sintered graphite boat support plate for sintering at a sintering temperature of 1000°C to 1300°C for a sintering time of 5 minutes to 7 minutes. Preferably, the sintering temperature used in this embodiment may be 1150°C and the sintering time may be 6 minutes.

[0056] The sixth step is to vibrate grind the sintered product. Specifically, the sintered product is poured into a vibration grinder, where the products collide and rub against each other, making the surface of the product more compact and removing the sharp edges and corners of the product.

[0057] The seventh step is product testing. The products after vibration grinding, that is, the sintered base 100 and counterweight 200, are tested to see if there are any defects such as cracks, chipping, bulging, and flashing on the product appearance. Standard testing fixtures are also used to test the product's external dimensions and select products that meet the dimensions required by the drawings. In addition, the product also needs to be tested for flaws, that is, using specially customized flaw detection equipment to detect whether the product has cracks.

[0058] Step 8: Cleaning and rust prevention: Use hydrocarbon cleaning agent to clean the product, soak it in volatile anti-rust oil and dry it for rust prevention.

[0059] Of course, when shipment is required, qualified products also need to be packaged and stocked.

[0060] The manufacturing method of the balance block provided by the present invention, because it is used to produce the balance block provided by the present invention, can also form a balance block with a complex structure. The manufactured balance block can also meet the preset specifications and material requirements of the balance block, can avoid a substantial change in the production process of the balance block, improve the production efficiency of the balance block, and reduce the production cost. In other words, the manufacturing method of the balance block provided by the present invention can manufacture the counterweight block 200 and the base 100 separately and then assemble them, making the manufacture of the balance block simpler. When manufacturing a balance block with a complex structure, the balance block can be formed in production using powder metallurgy high manganese steel material, which can meet the preset specifications and material requirements of the balance block, and can avoid a substantial change in the production process of the balance block, thereby improving the production efficiency of the balance block and reducing the production cost.

[0061] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A balancing weight, characterized in that: include: The base comprises an annular base, wherein the annular base is provided with a fixing portion; The counterweight block is provided with a mounting portion, and the counterweight block is detachably connected to the fixing portion through the mounting portion.

2. The balancing weight according to claim 1, characterized in that: The mounting portion includes a first boss and a second boss that are symmetrical to each other, and the first boss and the second boss protrude along the axial direction of the counterweight block.

3. The balancing weight according to claim 2, characterized in that: The fixing portion includes a first fixing hole and a second fixing hole that are symmetrical to each other. The first fixing hole is interference-fitted with the first boss, and the second fixing hole is interference-fitted with the second boss.

4. The balancing weight according to claim 1, characterized in that: The counterweight block is in an arc shape and is provided with an arc inclined surface, and the arc inclined surface is tangent to the outer arc edge of the counterweight block.

5. The balancing weight according to claim 4, characterized in that: A rounded corner is provided at the end of the counterweight.

6. The balancing weight according to claim 1, characterized in that: The base further includes a first assembly portion and a second assembly portion that are symmetrical to each other. The first assembly portion and the second assembly portion are arranged on the annular base. The first assembly portion and the second assembly portion are respectively provided with a first through hole and a second through hole that penetrate the annular base.

7. The balancing weight according to any one of claims 1 to 6, characterized in that: The material of the balance block is powder metallurgy high manganese steel.

8. The method for manufacturing a balancing weight according to any one of claims 1 to 7, characterized in that: The steps include: The first step is mixing, placing the powder metallurgy high manganese steel and additives in a mixing device for mixing; The second step is to press the base, and press the base on the first powder metallurgy pressing equipment; The third step is to press the counterweight block on the second powder metallurgy pressing equipment; Step 4: Assemble the base and counterweight; Step 5: Sintering the assembly of the base and the counterweight; Step 6: The sintered product is vibrated and ground; Step 7: Product testing; Step 8: Cleaning and rust prevention.

9. The method for manufacturing a balancing weight according to claim 8, characterized in that: In the second and third steps, the pressing temperature does not exceed 150°C.

10. The method for manufacturing a balancing weight according to claim 8, characterized in that: In the fifth step, the sintering temperature is 1000° C. to 1300° C., and the sintering time is 5 to 7 minutes.

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