Water-cooled oil-free scroll compressor

Abstract

The invention discloses a water-cooling type oil-free scroll compressor, which belongs to the technical field of vehicle-mounted compressed air supply equipment, and comprises a motor assembly, an external device of the motor assembly is connected with a motor front end cover, the front side of the motor front end cover is provided with a movable disc main body, a movable disc center bearing is embedded in the movable disc main body, and the motor assembly comprises a motor main shaft. A motor spindle is connected into the movable disc center bearing, a static disc body is installed on the front side of the movable disc body, and a static disc cover plate is installed on the front side of the static disc body. According to the invention, cooling liquid enters the water inlet water storage tank through the whole machine water inlet, then enters the movable disc water storage tank through the eccentric pin water inlet hole in sequence, and is fed into the static disc water storage tank and the front end cover water flow channel through the eccentric pin water outlet hole; the cooling liquid entering the water flow channel of the front end cover can sequentially spread to the interlayer of the water storage layer of the motor and then flows back to the vehicle-mounted cooling circulation system through the water outlet of the whole machine, and the vehicle-mounted cooling circulation system recools the cooling liquid after heat absorption and then completes circulation of the cooling liquid.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle-mounted compressed air supply equipment, and in particular relates to a water-cooled oil-free scroll compressor. Background Art

[0002] In commercial vehicles like electric buses and trucks, compressed air is often used in the braking system to drive the brake actuators. It can also be used to adjust vehicle height and provide shock absorption, directly impacting ride comfort and vehicle handling stability. Given these application scenarios, and particularly the safety demands of the braking system, strict requirements are placed on the cleanliness of compressed air. Once traditional lubricants are mixed with compressed air and enter the brake valve circuit or air spring airbag, they can lead to serious consequences such as valve failure, reduced braking performance, and airbag damage. Therefore, oil-free air compressors, meaning that no lubricant is required within the compression chamber and the compressed air output is oil-free, have become the preferred technology for automotive applications. The automotive market currently primarily uses oil-free air-cooled piston air compressors, oil-free water-cooled piston air compressors, and oil-free air-cooled scroll air compressors.

[0003] Piston engines have problems such as high vibration, high noise, high power consumption, short lifespan, and extremely low efficiency in plateaus. Air-cooled scroll engines have problems such as high cost, large size, difficulty in cooling under high temperature conditions, which can cause damage, and the air ducts are easily damaged by impurities such as dirt and stones.

[0004] Traditional scroll air compressors require cooling vents because air flows through the moving and static discs. This results in air leakage between the moving disc and the static disc during suction, rendering them useless as vacuum pumps and inapplicable in closed-loop systems such as automotive air suspensions. Consequently, there is an urgent need for a fully enclosed air compressor with low vibration and noise, a compact size, low cost, long life, strong environmental adaptability, and IP67 waterproofing. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of water circulation cooling of the moving disc body during movement of the moving part, and to solve the problem of air leakage in the heat dissipation seal of the air compressor, which makes it impossible to apply it to a closed circulation system, and to propose a water-cooled oil-free scroll compressor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A water-cooled oil-free scroll compressor includes a motor assembly, an external device of the motor assembly is connected to a motor front end cover, a moving disc body is installed on the front side of the motor front end cover, a moving disc center bearing is embedded in the moving disc body, the motor assembly includes a motor main shaft, the motor main shaft is connected to the moving disc center bearing, a stator body is installed on the front side of the moving disc body, a stator cover is installed on the front side of the stator body, an eccentric pin assembly is inserted between the moving disc body and the stator body, the rotation of the motor main shaft drives the moving disc body to move, and the compression movement of the moving disc body relative to the stator body is achieved through the relative rotation of four sets of eccentric pin assemblies;

[0008] The inner cavities of the movable disc body and the static disc body are both provided with a movable disc water storage tank and a static disc water storage tank. The eccentric pin assembly has a hollow cavity. Coolant circulation is achieved between the movable disc water storage tank and the static disc water storage tank via the hollow cavity of the eccentric pin assembly. Both sides of the top of the static disc body are connected with air inlets, and the air inlets are connected with the air inlet gap of the static disc body. The top of the static disc body is connected with an exhaust port, and the exhaust port is connected with the exhaust gap of the static disc body.

[0009] As a further description of the above technical solution:

[0010] The motor assembly is provided with a motor water storage interlayer on the outside. The motor water storage interlayer is connected to the static disk water storage tank through a front cover water flow channel opened on the motor front cover. One side of the motor water storage interlayer is connected to the water outlet of the whole machine.

[0011] As a further description of the above technical solution:

[0012] The front section of the motor main shaft is connected to the moving disc main body through transmission, and the air is compressed through the relative movement of the moving disc main body and the static disc main body.

[0013] As a further description of the above technical solution:

[0014] A water inlet for the entire machine is provided on one side of the static disc body, and a static disc water storage tank is provided in the static disc body. A water inlet storage tank is provided between the static disc water storage tank and the water inlet of the entire machine. The water inlet storage tank is connected to the eccentric pin water inlet hole, and the eccentric pin water inlet hole is connected to the moving disc water storage tank. The eccentric pin water outlet hole on the other side of the eccentric pin assembly extends into the static disc water storage tank.

[0015] As a further description of the above technical solution:

[0016] The eccentric pin assembly includes an eccentric pin body, which has a hollow structure inside. Anti-rotation bearings are sleeved on both sides of the outside of the eccentric pin body. An eccentric pin locking nut is provided on the outside of the eccentric pin body, and the eccentric pin locking nut locks the anti-rotation bearing.

[0017] As a further description of the above technical solution:

[0018] There are four groups of eccentric pin bodies, and internal water flows in two directions and out two directions between the multiple groups of eccentric pin bodies to form a circulating liquid channel.

[0019] As a further description of the above technical solution:

[0020] Water seals are provided on the outer sides of both ends of the eccentric pin body, and the water seals are sealed and connected to corresponding positions on one side of the static disc body or the dynamic disc body.

[0021] As a further description of the above technical solution:

[0022] A stator plate sealing ring is connected between the stator plate body and the front cover plate of the stator plate body, a pump body sealing ring is connected between the dynamic plate body and the motor assembly, a motor sealing ring is provided between the motor assembly and the motor cover plate, a plurality of water flow channels and bolt sealing rings are provided between the motor water storage interlayer and the stator plate body, a controller sealing ring is provided between the top of the motor front end cover and the controller, a motor rear cover plate sealing ring, a second motor sealing ring and a third motor sealing ring are provided between the motor front end cover and the motor rear cover plate to fully seal the gap of the air compressor.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In the present invention, after the coolant enters the water inlet tank through the water inlet of the whole machine, it enters the dynamic disc water tank through the eccentric pin water inlet hole in turn and is sent into the static disc water tank and the front cover water flow channel through the eccentric pin water outlet hole. The coolant entering the front cover water flow channel can sequentially spread to the motor water storage layer interlayer and then flow back to the vehicle cooling circulation system through the water outlet of the whole machine. The vehicle cooling circulation system re-cools the coolant after absorbing heat to complete the cooling liquid circulation.

[0025] 2. In this invention, the moving plate body is directly connected to the static plate body via four sets of eccentric pin assemblies. Compared with the traditional moving plate body connected to the static plate body through the moving plate fixing seat, eccentric pin assemblies, and base, this improves the precision of transmission, saves the cost of transmission components, and improves integration.

[0026] 3. The present invention solves the problem of water circulation cooling during eccentric motion of the moving parts. The moving disc body, as the eccentric moving part with the highest heat generation in the scroll compressor, greatly improves its service life.

[0027] 4. In the present invention, a fully enclosed structure of the oil-free scroll air compressor is realized, so that it can be applied to more fields such as closed structure air suspension, and scenarios requiring IP67 and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the disassembled structure of a water-cooled oil-free scroll compressor proposed in the present invention;

[0029] Figure 2 This is a schematic diagram of a partial side half-section structure of a water-cooled oil-free scroll compressor proposed by the present invention;

[0030] Figure 3 This is a schematic diagram of a half-section structure of a water-cooled oil-free scroll compressor proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the water flow channel of the front cover of a water-cooled oil-free scroll compressor proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the top view of the motor front end cover of a water-cooled oil-free scroll compressor proposed by the present invention;

[0033] Figure 6 This is a schematic cross-sectional structure diagram of a stator plate water storage tank of a water-cooled oil-free scroll compressor proposed by the present invention;

[0034] Figure 7 This is a schematic side half-section structural diagram of a moving disk body of a water-cooled oil-free scroll compressor proposed by the present invention;

[0035] Figure 8 This is a schematic diagram of the side structure of the moving disk body of a water-cooled oil-free scroll compressor proposed by the present invention;

[0036] Figure 9 This is a structural schematic diagram of an eccentric pin assembly of a water-cooled oil-free scroll compressor proposed by the present invention;

[0037] Figure 10 This is a schematic cross-sectional view of an eccentric pin assembly of a water-cooled oil-free scroll compressor proposed by the present invention;

[0038] Figure 11 This is a schematic diagram of the assembly structure of a water-cooled oil-free scroll compressor proposed by the present invention;

[0039] Figure 12 This is a schematic diagram of the split structure of a water-cooled oil-free scroll compressor proposed by the present invention from another angle.

[0040] Legend:

[0041] 1. Stator plate cover; 2. Stator plate body; 201. Air inlet; 202. Exhaust port; 3. Moving plate body; 301. Moving plate center bearing; 4. Moving plate cover; 5. Motor front cover; 6. Motor rear cover; 7. Motor assembly; 701. Motor main shaft; 8. Eccentric pin assembly; 801. Eccentric pin body; 802. Anti-rotation bearing; 803. Eccentric pin locking nut; 804. Water seal; 9. Water inlet of the whole machine; 10. Water inlet water tank; 11. Eccentric pin water inlet hole; 12. Moving plate water tank; 13. Eccentric pin water outlet hole; 14. Stator plate water tank; 15. Water flow channel of the front cover; 16. Motor water storage interlayer; 17. Water outlet of the whole machine. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] See also Figures 1-12 The present invention provides a technical solution: a water-cooled oil-free scroll compressor, comprising a motor assembly 7, an external device of the motor assembly 7 is connected to a motor front end cover 5, a movable plate body 3 is installed on the front side of the motor front end cover 5, and is characterized in that a movable plate center bearing 301 is embedded in the movable plate body 3, the motor assembly 7 comprises a motor main shaft 701, the motor main shaft 701 is connected to the movable plate center bearing 301, a static plate body 2 is installed on the front side of the movable plate body 3, a static plate cover plate 1 is installed on the front side of the static plate body 2, and an eccentric pin assembly 8 is passed through the movable plate body 3 and the static plate body 2;

[0044] The inner cavities of the movable plate body 3 and the static plate body 2 are both provided with a movable plate water storage tank 12 and a static plate water storage tank 14. The eccentric pin assembly 8 has a hollow cavity, and the coolant circulates between the movable plate water storage tank 12 and the static plate water storage tank 14 through the hollow cavity of the eccentric pin assembly 8.

[0045] The motor assembly 7 has a motor water storage interlayer 16 on the outside, which is connected to the static disk water storage tank 14 through the front cover water flow channel 15 opened by the motor front cover 5. One side of the motor water storage interlayer 16 is connected to the whole machine water outlet 17;

[0046] The motor assembly 7 further includes a motor main shaft 701, the front end of which is in driving connection with the moving disc body 3, and the air is compressed by the relative movement of the moving disc body 3 and the static disc body 2;

[0047] The top of the stator body 2 is connected to both sides with air inlets 201, and the air inlets 201 are connected to the air inlet gap of the stator body 2. The top of the stator body 2 is connected to an exhaust port 202, and the exhaust port 202 is connected to the exhaust gap of the stator body 2.

[0048] The stator body 2 is a fixed involute scroll disk, and its outer space, namely the intake gap, is connected to the air inlet 201 and is always in the intake process, while its inner space, namely the exhaust gap, is connected to the exhaust port 202 and is always in the exhaust process.

[0049] Specifically, the output shaft of the motor main shaft 701 rotates to drive the moving disc body 3 to move, and the movement of the moving disc body 3 can compress the air from the intake gap of the stator disc body 2 through the vortex and then discharge it through the exhaust gap of the stator disc body 2;

[0050] A water inlet 9 for the whole machine is provided on one side of the stator body 2, and a stator water storage tank 14 is opened in the stator body 2. A water inlet storage tank 10 is provided between the stator water storage tank 14 and the water inlet 9 for the whole machine. The water inlet storage tank 10 is connected to the eccentric pin water inlet hole 11, and the eccentric pin water inlet hole 11 is connected to the moving disk water storage tank 12. The eccentric pin water outlet hole 13 on the other side of the eccentric pin assembly 8 extends into the stator water storage tank 14.

[0051] Among them, the water inlet and the water outlet are connected to the coolant through the coolant circulation system of the new energy bus or new energy truck. After the coolant enters the water inlet tank 10 through the water inlet 9 of the whole machine, it enters the dynamic plate water tank 12 through the eccentric pin water inlet hole 11 in turn, and is sent to the static plate water tank 14 and the front cover water flow channel 15 through the eccentric pin water outlet hole 13. The coolant entering the front cover water flow channel 15 can spread to the motor water storage layer interlayer in turn and then flow back to the vehicle cooling circulation system through the whole machine water outlet 17. The vehicle cooling circulation system re-cools the coolant after absorbing heat to complete the cooling liquid circulation;

[0052] The moving disc body 3 is connected through the hollow structure of the eccentric pin assembly 8 to achieve the inflow and outflow of the coolant;

[0053] The eccentric pin assembly 8 includes an eccentric pin body 801, which has a hollow structure inside. Anti-rotation bearings 802 are sleeved on both sides of the eccentric pin body 801. An eccentric pin locking nut 803 is provided on the outside of the eccentric pin body 801 to lock the anti-rotation bearing 802.

[0054] There are four groups of eccentric pin bodies 801, and internal water flows in two directions and out two directions between the multiple groups of eccentric pin bodies 801 to form a circulating liquid channel.

[0055] The water flowing in and out of the eccentric pin assembly 8 can cool the external anti-rotation bearing 802. When the movable plate body 3 rotates, the four sets of eccentric pin assemblies 8 can rotate relative to the static plate body 2. The direct connection between the movable plate body 3 and the static plate body 2 eliminates the need for corresponding fixed seats, bearing seats, and bases, which is conducive to improving overall sealing and integration, and enhancing transmission accuracy and durability.

[0056] The eccentric pin assembly 8 has two rotatable pins at the ends thereof connected to the corresponding side of the movable plate body 3 or the static plate body 2 to maintain the rotational compression stroke of the movable plate body 3 relative to the static plate body 2.

[0057] The two ends of the eccentric pin body 801 are covered with water seals 804, and the water seals 804 seal the corresponding positions on one side of the static plate body 2 or the dynamic plate body 3 connected to the corresponding positions;

[0058] A stator plate sealing ring is connected between the stator plate body 2 and the front cover of the stator plate body 2, a pump body sealing ring is connected between the dynamic plate body 3 and the motor assembly 7, a motor sealing ring is provided between the motor assembly 7 and the motor cover plate, a plurality of water flow channels and bolt sealing rings are provided between the motor water storage interlayer 16 and the stator plate body 2, a controller sealing ring is provided between the top of the motor front end cover 5 and the controller, a motor rear cover plate sealing ring, a second motor sealing ring and a third motor sealing ring are provided between the motor front end cover 5 and the motor rear cover plate 6 to fully seal the gap of the air compressor;

[0059] By drawing a fully sealed structure, noise reduction can be achieved by wrapping the coolant, making the noise lower. The water flows directly through the heat source of the dynamic and static disk body 2, bearings and motor assembly 7, which can quickly cool down and help achieve IP67 waterproof performance.

[0060] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0061] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A water-cooled oil-free scroll compressor, comprising a motor assembly (7), an external device of the motor assembly (7) being connected to a motor front end cover (5), a moving disc body (3) being mounted on the front side of the motor front end cover (5), characterized in that: A moving disc center bearing (301) is embedded in the moving disc body (3), and the motor assembly (7) includes a motor main shaft (701), which is connected to the moving disc center bearing (301). A static disc body (2) is installed on the front side of the moving disc body (3), and a static disc cover plate (1) is installed on the front side of the static disc body (2). An eccentric pin assembly (8) is inserted between the moving disc body (3) and the static disc body (2). The rotation of the motor main shaft (701) drives the moving disc body (3) to move, and the compression movement of the moving disc body (3) relative to the static disc body (2) is achieved through the relative rotation of the four groups of eccentric pin assemblies (8); The inner cavities of the movable disc body (3) and the static disc body (2) are both provided with a movable disc water storage tank (12) and a static disc water storage tank (14); the eccentric pin assembly (8) has a hollow cavity; cooling liquid circulation is achieved between the movable disc water storage tank (12) and the static disc water storage tank (14) through the hollow cavity of the eccentric pin assembly (8); both sides of the top of the static disc body (2) are connected with air inlets (201), and the air inlets (201) are connected with the air inlet gap of the static disc body (2); the top of the static disc body (2) is connected with an exhaust port (202), and the exhaust port (202) is connected with the exhaust gap of the static disc body (2).

2. A water-cooled oil-free scroll compressor according to claim 1, characterized in that: The motor assembly (7) has a motor water storage interlayer (16) on the outside. The motor water storage interlayer (16) is connected to the static disk water storage tank (14) through a front cover water flow channel (15) opened on the motor front cover (5). One side of the motor water storage interlayer (16) is connected to a whole machine water outlet (17).

3. The water-cooled oil-free scroll compressor according to claim 1, characterized in that: The front section of the motor main shaft (701) is in transmission connection with the moving disc main body (3), and the air is compressed by the relative movement of the moving disc main body (3) and the static disc main body (2).

4. The water-cooled oil-free scroll compressor according to claim 1, characterized in that: A whole-machine water inlet (9) is provided on one side of the static disc body (2), and a static disc water storage tank (14) is provided in the static disc body (2). A water inlet storage tank (10) is provided between the static disc water storage tank (14) and the whole-machine water inlet (9). The water inlet storage tank (10) is connected to the eccentric pin water inlet hole (11), and the eccentric pin water inlet hole (11) is connected to the moving disc water storage tank (12). The eccentric pin water outlet hole (13) on the other side of the eccentric pin assembly (8) extends into the static disc water storage tank (14).

5. The water-cooled oil-free scroll compressor according to claim 1, characterized in that: The eccentric pin assembly (8) comprises an eccentric pin body (801), the interior of the eccentric pin body (801) has a hollow structure, and anti-rotation bearings (802) are sleeved on both sides of the exterior of the eccentric pin body (801).

6. The water-cooled oil-free scroll compressor according to claim 5, characterized in that: An eccentric pin locking nut (803) is provided outside the eccentric pin body (801), and the eccentric pin locking nut (803) locks the anti-rotation bearing (802).

7. The water-cooled oil-free scroll compressor according to claim 5, characterized in that: There are four groups of eccentric pin bodies (801), and internal water flows in two inlets and out two outlets between the multiple groups of eccentric pin bodies (801) to form a circulating liquid channel.

8. The water-cooled oil-free scroll compressor according to claim 5, characterized in that: Water seals (804) are provided on the exterior of both ends of the eccentric pin body (801), and the water seals (804) seal the corresponding positions on one side of the static disc body (2) or the dynamic disc body (3) connected to the corresponding positions.

9. The water-cooled oil-free scroll compressor according to claim 1, characterized in that: A static disc body sealing ring is connected between the static disc body (2) and the front cover of the static disc body (2), a pump body sealing ring is connected between the dynamic disc body (3) and the motor assembly (7), a motor sealing ring is provided between the motor assembly (7) and the motor cover, and a plurality of water flow channels and bolt sealing rings are provided between the motor water storage interlayer (16) and the static disc body (2).

10. The water-cooled oil-free scroll compressor according to claim 1, characterized in that: A controller sealing ring is provided between the top of the motor front end cover (5) and the controller, and a motor rear cover plate sealing ring, a second motor sealing ring and a third motor sealing ring are provided between the motor front end cover (5) and the motor rear cover plate (6) to fully seal the gap of the air compressor.

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