Horizontal scroll compressor with starting oil pool

Abstract

A horizontal scroll compressor with starting oil pool relates to the technical field of horizontal scroll compressor, which comprises a compressor cylinder, the bottom of the compressor cylinder is formed with an oil pool, the inlet end of an oil suction pipe assembly is immersed below the liquid level of the oil pool and is communicated with the crankshaft oil way of the crankshaft axis through a volume pump; the oil suction pipe assembly comprises a filter screen, an oil suction pipe, an oil storage cavity and an oil suction pipe end plate connected in sequence, the oil storage cavity is arranged between the oil suction pipe and the oil suction pipe end plate and forms a closed cavity, and the oil storage cavity is further respectively provided with an oil inlet hole and an oil outlet hole; at least one oil storage groove is processed in the crankshaft oil way of the crankshaft, and at least one oil supply hole for supplying oil to the bearing is radially arranged on the groove wall of the oil storage groove. The oil storage structure is arranged at the inlet of the oil suction pipe and the inside of the crankshaft oil way, the lubricating oil is latched when the machine stops, the oil can be immediately driven or pumped to the friction pair by the crankshaft when the compressor starts again, and lubrication zero delay is realized.

Description

Technical Field

[0001] This invention relates to the field of horizontal scroll compressor technology, and more particularly to a horizontal scroll compressor with a starting oil sump. Background Technology

[0002] During the operation of an air conditioning system, the circulation of lubricating oil in the compressor is driven by the flow of refrigerant, realizing circulation in the system pipeline and involving every component in the compressor. Due to the special structure and operation mode of the horizontal scroll compressor, its significant structural feature is the large number of friction pairs, the most important of which are the friction pairs of the bearings. Sufficient lubrication of the friction pairs is crucial.

[0003] At present, when the compressor is running normally, the friction pairs of bearings can be fully lubricated through the reasonable design of the oil supply, which can reduce friction, wear, vibration and noise. However, when the compressor is stopped for a long time, the bearings are in a state without lubricating oil. When the compressor is started, the lubricating oil cannot be delivered to the friction pairs of the bearings in time, which leads to dry friction of the bearings. Especially under heavy load, the reliability of the bearings is reduced, and wear and damage due to lack of oil occur.

[0004] Therefore, it is essential to propose a horizontal scroll compressor that can solve the bearing wear problem caused during the initial startup phase. Summary of the Invention

[0005] To address the technical problem mentioned above, where existing compressors, after prolonged shutdown, fail to deliver lubricating oil to the bearing friction pairs in a timely manner upon restarting, leading to dry friction and increased wear and damage risks, this invention provides a horizontal scroll compressor with a starting oil reservoir. The main advantage of this invention is the installation of oil storage structures at the oil inlet of the suction pipe and inside the crankshaft oil passage. These structures lock in lubricating oil during shutdown, ensuring that upon restarting the compressor, the oil is immediately driven or pumped to the friction pairs by the crankshaft, achieving zero-delay lubrication.

[0006] The technical means employed in this invention are as follows:

[0007] A horizontal scroll compressor with a starting oil sump includes a compressor body, a motor stator, a motor rotor, a crankshaft, a main support, a secondary support, a fixed scroll, a moving scroll, a positive displacement pump, and an oil suction pipe assembly; an oil sump is formed at the bottom of the compressor body, and the inlet end of the oil suction pipe assembly is immersed below the surface of the oil sump and is connected to the crankshaft oil passage at the crankshaft axis through the positive displacement pump; The oil suction pipe assembly includes a filter screen, an oil suction pipe, an oil storage chamber, and an oil suction pipe end plate connected in sequence. The oil storage chamber is disposed between the oil suction pipe and the oil suction pipe end plate to form a closed cavity, and the oil storage chamber is also provided with an oil inlet and an oil outlet. The crankshaft has at least one oil reservoir machined in its crankshaft oil passage, and at least one oil supply hole for supplying oil to the bearing is radially opened on the wall of the oil reservoir.

[0008] Furthermore, the oil inlet is located on the oil storage chamber near the oil suction pipe, and the oil outlet is located on the oil storage chamber near the end plate of the oil suction pipe. At the same time, the position of the oil inlet is higher than the position of the oil outlet.

[0009] Furthermore, the oil storage chamber is an annular component with a groove shape, and a connecting hole is opened at one end near the oil suction pipe. The oil suction pipe passes through the connecting hole and is fixedly connected to the oil storage chamber.

[0010] Furthermore, a through hole is provided in the middle of the oil suction pipe end plate, and the position of the through hole corresponds to the inner diameter area of ​​the oil storage cavity groove.

[0011] Furthermore, the oil reservoir is a circumferential annular groove with an inner diameter larger than the inner diameter of the crankshaft oil passage, and the extension plane of the oil reservoir is perpendicular to the axis of the crankshaft.

[0012] Furthermore, the ratio of the inner diameter of the oil reservoir to the outer diameter of the crankshaft ranges from 0.05 to 0.6.

[0013] Furthermore, the axial position of the oil reservoir is located between the oil supply hole on the crankshaft used for supplying oil to the eccentric shaft and the oil supply hole used for supplying oil to the auxiliary shaft.

[0014] Furthermore, the oil supply hole on the crankshaft is located above the radial center of gravity of the balance block on the crankshaft.

[0015] Furthermore, the number of oil storage tanks is at least one, and the oil storage tanks are arranged at the axial position corresponding to each oil supply hole.

[0016] Compared with the prior art, the present invention has the following advantages: 1. Achieve instantaneous lubrication upon startup: By setting up an oil storage structure inside the oil suction pipe inlet and crankshaft oil circuit, lubricating oil is locked in when the machine is stopped, so that when the compressor restarts, the oil can be immediately driven or pumped to the friction pair by the crankshaft, achieving zero-delay lubrication.

[0017] 2. Simple and reliable structure: The oil storage chamber and oil storage tank are both structural improvements integrated into existing parts, without the need to add additional complex parts or external systems, resulting in low cost and high reliability.

[0018] 3. Highly targeted: The oil reservoir is located directly on the oil circuit node that supplies oil to the key friction pair (bearing), and the oil storage chamber is located at the pump oil inlet. The oil storage position is precise and the lubrication efficiency is high.

[0019] 4. Improve overall machine reliability: Effectively avoids dry friction during the initial startup, reduces wear, and improves the service life and operational stability of the horizontal scroll compressor under frequent start-stop conditions.

[0020] Based on the above reasons, this invention can be widely promoted in fields such as horizontal scroll compressors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a horizontal scroll compressor according to an embodiment of the present invention.

[0023] Figure 2 This is a partially enlarged cross-sectional view of the oil suction pipe assembly in an embodiment of the present invention, showing the structure of the oil storage chamber.

[0024] Figure 3 This is a partial cross-sectional view of the crankshaft in an embodiment of the present invention, showing the structure of the shaft oil reservoir.

[0025] Figure 4 This is a partial cross-sectional view of the crankshaft oil supply hole and the balance block in an embodiment of the present invention, showing the relative relationship between the oil supply hole and the balance block.

[0026] Figure 5 This is a partial cross-sectional view of the crankshaft in an embodiment of the present invention, showing the structure of the shaft oil reservoir.

[0027] In the diagram: 1. Compressor cylinder; 2. Motor stator; 3. Motor rotor; 4. Crankshaft; 4a. Crankshaft oil passage; 4b. Oil reservoir; 4c. Oil supply port; 5. Main support; 6. Secondary support; 7. Fixed scroll; 8. Moving scroll; 9. Positive displacement pump; 10. Suction pipe assembly; 10a. Filter screen; 10b. Suction pipe; 10c. Oil reservoir; 10c1. Oil inlet; 10c2. Oil outlet; 10d. Suction pipe end plate; 11. Oil sump; 12. Balance block; 13. First block; 14. Second block. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] This invention provides a horizontal scroll compressor with a starting oil sump, such as... Figure 1-3 As shown, the main structure of the compressor includes a compressor housing 1, inside which a motor stator 2 is fixedly installed in the center. A motor rotor 3 is fixedly installed in the middle of a crankshaft 4 and passes through the motor stator 2. The two ends of the crankshaft 4 are supported in the compressor housing 1 by a main support 5 and a secondary support 6, respectively. A scroll compression mechanism consisting of a fixed scroll 7 and a moving scroll 8 is installed on the right side of the main support 5. A positive displacement pump 9 and an oil suction pipe assembly 10 are installed in the middle of the secondary support 6. An oil sump 11 is formed at the bottom of the compressor housing 1, and the inlet end of the oil suction pipe assembly 10 is immersed below the liquid surface of the oil sump 11. The two ends of the compressor housing 1 are sealed by end caps, which are provided with an intake port and an exhaust port.

[0036] First oil storage structure – oil suction pipe assembly 10 oil storage chamber, see reference. Figure 2The oil suction pipe assembly 10 is composed of a filter screen 10a, an oil suction pipe 10b, an oil storage chamber 10c, and an oil suction pipe end plate 10d connected in sequence. The oil storage chamber 10c is an annular component with a groove shape, and a connecting hole is opened at one end near the oil suction pipe 10b. The oil suction pipe 10b passes through this hole and is fixed thereto. The oil suction pipe end plate 10d is sealed and fixed to the end of the oil storage chamber 10c, and a through hole is provided in the center of the oil suction pipe end plate 10d. The oil storage chamber 10c is encapsulated between the oil suction pipe 10b and the oil suction pipe end plate 10d, forming a sealed cavity. Importantly, the oil storage chamber 10c is structurally designed such that the position of its oil inlet 10c1 (near the oil suction pipe 10b side) is higher than the position of its oil outlet 10c2 (near the oil suction pipe end plate 10d side). This high-low design allows the lubricating oil to be naturally retained in the oil reservoir 10c by gravity and liquid surface tension when the compressor stops, instead of flowing completely back into the oil sump. When the compressor is working normally, it is full of refrigeration oil, and when it stops, the oil reservoir stores a certain volume of lubricating oil for lubrication during the initial startup.

[0037] The second oil storage structure—the crankshaft shaft oil reservoir—see [reference needed]. Figure 3 A through-hole crankshaft oil passage 4a is machined along the axis of crankshaft 4. At a specific axial position of the crankshaft oil passage 4a (i.e., inside the three oil supply holes of the crankshaft), a circumferential annular groove is machined as an oil reservoir 4b. The extending plane of the oil reservoir 4b is approximately perpendicular to the axis of crankshaft 4. The inner diameter of the oil reservoir 4b is larger than the inner diameter of the crankshaft oil passage 4a, preferably in a ratio of 0.05 to 0.6 between the inner diameter of the oil reservoir 4b and the outer diameter of the crankshaft 4. The axial position of the oil reservoir 4b is set between the oil supply hole on the eccentric shaft and the oil supply hole on the secondary shaft. At least one oil supply hole 4c is radially machined on the wall of the oil reservoir 4b, connecting the oil reservoir 4b to a critical friction pair outside the crankshaft 4 (such as a bearing within the main support 5 or secondary support 6). When the compressor is running, the lubricating oil flows through this area and fills the oil reservoir 4b; when the compressor stops, some lubricating oil will remain in the oil reservoir 4b, which is located in the middle of the oil circuit.

[0038] Other embodiments: such as Figure 5 As shown, two oil reservoirs 4b are machined on the axial position of the crankshaft oil passage 4a to facilitate the machining of the oil reservoirs 4b. The first block 13 and the second block 14 are used to block both ends of the crankshaft.

[0039] The working principle and process of this invention: Normal operation and oil storage phase: After the compressor starts and enters stable operation, the positive displacement pump 9 works, drawing refrigerant oil from the oil sump 11 through the oil suction pipe assembly 10. The oil flows sequentially through the filter screen 10a and the oil suction pipe 10b, filling the oil storage chamber 10c, and then enters the oil passage of the auxiliary support 6 through the through hole of the oil suction pipe end plate 10d, flowing into the crankshaft oil passage 4a. When the oil flows in the crankshaft oil passage 4a, it fills the oil storage tank 4b, and is then thrown out or pressed out through the oil supply hole 4c, lubricating the bearings and other friction pairs. At this time, both oil storage structures are part of the oil passage and are in a "full" state.

[0040] Shutdown and Oil Retention Phase: When the compressor is shut down, the oil system pressure disappears. In the oil suction pipe assembly 10, because the oil inlet 10c1 of the oil reservoir 10c is higher than the oil outlet 10c2, and the cavity is sealed, most of the oil will remain in the oil reservoir 10c under the action of gravity. In the crankshaft 4, because the volume of the oil reservoir 4b is larger than the oil passage diameter and it is located in the middle section of the oil passage, some lubricating oil will remain in the oil reservoir 4b due to the combined effects of capillary action, liquid adhesion, and gravity.

[0041] Restart and Instantaneous Oil Supply Phase: When the compressor restarts, the two oil storage structures immediately come into play before the positive displacement pump 9 has established a stable oil pressure. The crankshaft 4 begins to rotate, and the lubricating oil stored in the oil reservoir 4b, under centrifugal force, is rapidly thrown through the oil supply hole 4c to the surrounding bearings, achieving initial lubrication with zero time difference. Simultaneously, the oil stored in the oil reservoir 10c located at the pump inlet is immediately drawn into the positive displacement pump 9 and pumped into the oil circuit as the first oil source during startup, quickly replenishing the system. The two mechanisms work together to ensure that critical friction pairs receive continuous lubrication from the moment the start-up command is issued, completely eliminating the lubrication gap.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A horizontal scroll compressor with a starting oil sump, characterized in that, The compressor includes a compressor body (1), a motor stator (2), a motor rotor (3), a crankshaft (4), a main support (5), a secondary support (6), a fixed scroll (7), a moving scroll (8), a volumetric pump (9), and an oil suction pipe assembly (10). An oil sump (11) is formed at the bottom of the compressor body (1), and the inlet end of the oil suction pipe assembly (10) is immersed below the surface of the oil sump (11) and is connected to the crankshaft oil passage (4a) at the center of the crankshaft (4) through the volumetric pump (9). The oil suction pipe assembly (10) includes a filter screen (10a), an oil suction pipe (10b), an oil storage chamber (10c), and an oil suction pipe end plate (10d) connected in sequence. The oil storage chamber (10c) is disposed between the oil suction pipe (10b) and the oil suction pipe end plate (10d) to form a closed cavity. The oil storage chamber (10c) is also provided with an oil inlet (10c1) and an oil outlet (10c2). At least one oil reservoir (4b) is machined in the crankshaft oil passage (4a) of the crankshaft (4), and at least one oil supply hole (4c) for supplying oil to the bearing is radially opened on the wall of the oil reservoir (4b).

2. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The oil inlet (10c1) is located on the oil storage chamber (10c) near the oil suction pipe (10b), and the oil outlet (10c2) is located on the oil storage chamber (10c) near the oil suction pipe end plate (10d). At the same time, the position of the oil inlet (10c1) is higher than the position of the oil outlet (10c2).

3. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The oil storage chamber (10c) is an annular component with a groove shape. A connecting hole is provided at one end of the oil suction pipe (10b). The oil suction pipe (10b) passes through the connecting hole and is fixedly connected to the oil storage chamber (10c).

4. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The oil suction pipe end plate (10d) has a through hole in the middle, and the through hole is located in the inner diameter area of ​​the groove of the oil storage chamber (10c).

5. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The oil reservoir (4b) is a circumferential annular groove with an inner diameter larger than that of the crankshaft oil passage (4a). The extension plane of the oil reservoir (4b) is perpendicular to the axis of the crankshaft (4).

6. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The ratio of the inner diameter of the oil reservoir (4b) to the outer diameter of the crankshaft (4) is in the range of 0.05-0.

6.

7. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The axial position of the oil reservoir (4b) is located between the oil supply hole on the crankshaft (4) for supplying oil to the eccentric shaft and the oil supply hole for supplying oil to the auxiliary shaft.

8. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The oil supply hole (4c) on the crankshaft (4) is located above the radial center of gravity of the balance block (12) on the crankshaft (4).

9. The horizontal scroll compressor with a starting oil sump according to claim 1, characterized in that, The number of oil storage tanks (4b) is at least one, and the oil storage tanks (4b) are arranged at the axial position corresponding to each oil supply hole (4c).

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