Pump body assembly and scroll compressor

Abstract

The application provides a pump body assembly and a scroll compressor. The pump body assembly comprises a rotating shaft and a shaft sleeve, the shaft sleeve is provided with an eccentric hole, one end of the rotating shaft is arranged in the eccentric hole, the outer wall of the rotating shaft and the inner wall of the eccentric hole are both provided with a limiting groove, the limiting grooves on the two opposite surfaces are opposite to each other, and the limiting grooves constitute a limiting hole; a control block is slidably arranged in or out of the limiting hole; the control block is slid into the limiting hole, so that the rotating shaft and the shaft sleeve are synchronously operated; and the control block is slid out of the limiting hole, so that the rotating shaft and the shaft sleeve can be relatively rotated. The application adjusts the relative position of the control block and the limiting hole, adjusts the interaction relationship between the rotating shaft and the shaft sleeve, selects the connection or disconnection of the rotating shaft and the shaft sleeve according to the use requirement, and avoids the phenomenon that the pump body cannot be operated due to oil shortage because the oil level is too low to provide sufficient oil supply for the end surface of the pump body.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of scroll compressors, and particularly relates to a pump body assembly and a scroll compressor. BACKGROUND

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size and stable operation. Generally, a scroll compressor is composed of a closed tube shell, a dynamic scroll plate, a static scroll plate, a frame, a crankshaft, an anti-rotation sliding ring, a motor and an oil supply structure device.

[0003] During operation of the scroll compressor, the oil supply amount of the pump body plays a crucial role in the reliability of the compressor. When the compressor is short of oil, it cannot provide sufficient oil supply to the pump body, which may cause wear of the pump body and affect the reliability of the compressor.

[0004] The oil supply oil path of the pump body of the scroll compressor is driven by the crankshaft to rotate and absorb oil. When the lubricating oil is transported through the high-pressure oil groove on the back of the dynamic plate via the central oil path of the crankshaft, the lubricating oil is then transported to the end face of the pump body through the related oil supply structure. When the compressor starts, and during the operation of severe working conditions, there may be insufficient oil supply, and the oil surface of the high-pressure oil groove on the back of the dynamic scroll plate is low, which cannot provide sufficient oil supply to the end face of the pump body. SUMMARY

[0005] Therefore, the application provides a pump body assembly and a scroll compressor, which can solve the problem that the oil surface of the high-pressure oil groove on the back of the dynamic scroll plate is low and cannot provide sufficient oil supply to the end face of the pump body in the prior art.

[0006] To solve the above problems, the application provides a pump body assembly, which comprises:

[0007] A rotating shaft and a shaft sleeve, the shaft sleeve is provided with an eccentric hole, and one end of the rotating shaft is arranged in the eccentric hole; limit grooves are arranged on the opposite surfaces of the outer wall of the rotating shaft and the inner wall of the eccentric hole, and the limit grooves on the two places are opposite to form a limit hole when the limit grooves on the two places are opposite;

[0008] A control block is movably slid into or out of the limit hole; the control block is slid into the limit hole, so that the rotating shaft and the shaft sleeve are synchronously operated; and the control block is slid out of the limit hole, so that the rotating shaft and the shaft sleeve can be relatively rotated.

[0009] Optionally, the limit grooves on the two places are arranged along the axial direction of the rotating shaft, and the control block is slid into or out of the limit hole along the axial direction of the rotating shaft.

[0010] Optionally, the shaft axis is vertically arranged; the pump body assembly further comprises an oil groove, and the limiting hole is arranged in the oil groove; the density of the control block is less than the density of oil in the oil groove, and the control block slides into or out of the limiting hole along with the change of the oil level of the oil.

[0011] Optionally, the eccentric hole is a blind hole structure, and the shaft sleeve is arranged at one end of the rotating shaft.

[0012] Optionally, the opening end of the shaft sleeve is provided with a groove, and the control block is arranged in the groove when the control block slides out of the limiting hole.

[0013] Optionally, the side wall of the groove is provided with an oil hole, and a plurality of oil holes are uniformly distributed along the circumferential wall of the groove.

[0014] According to another aspect of the present application, a scroll compressor is provided, comprising the pump body assembly as described above.

[0015] Optionally, the scroll compressor further comprises a movable scroll plate, and the rotating shaft is connected with the movable scroll plate through the shaft sleeve.

[0016] Optionally, the rotating shaft comprises a main shaft, and one end of the rotating shaft is arranged in a stepped structure with a smaller outer diameter than the main shaft; when the pump body assembly comprises an oil groove, the scroll compressor further comprises an upper support, and the oil groove is arranged on the upper support to form a groove structure surrounded by the upper support and the main shaft.

[0017] Optionally, the center of the rotating shaft is provided with an oil channel, the upper end of the oil channel is communicated with the gap between the rotating shaft and the shaft sleeve, and the lower end of the oil channel is communicated with an oil pool at the bottom of the scroll compressor.

[0018] The pump body assembly provided by the present application comprises a rotating shaft and a shaft sleeve, the shaft sleeve is provided with an eccentric hole, and one end of the rotating shaft is arranged in the eccentric hole; the outer wall of the rotating shaft and the inner wall of the eccentric hole are both provided with limiting grooves, and the limiting grooves are opposite to each other to form a limiting hole; a control block is movably arranged in or out of the limiting hole; the control block slides into the limiting hole to make the rotating shaft and the shaft sleeve rotate synchronously; and the control block slides out of the limiting hole to make the rotating shaft and the shaft sleeve relatively rotate.

[0019] The present application adjusts the relative position of the control block and the limiting hole to adjust the interaction relationship between the rotating shaft and the shaft sleeve, and the connection or disconnection of the rotating shaft and the shaft sleeve can be selected according to the use requirement, so that whether the pump body operates or not can be selected when the oil level of the high-pressure oil groove on the back of the movable scroll plate changes, and the phenomenon of pump body oil shortage operation caused by insufficient oil supply to the end surface of the pump body due to too low oil level can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of a scroll compressor according to an embodiment of the present application;

[0021] Figure 2 is an exploded view of a pump body assembly according to an embodiment of the present application;

[0022] Figure 3 is a view of a shaft and a shaft sleeve in a separated state according to an embodiment of the present application;

[0023] Figure 4 is a view of a shaft and a shaft sleeve in a connected state according to an embodiment of the present application;

[0024] Figure 5 is a cross-sectional view of a shaft and a shaft sleeve according to an embodiment of the present application.

[0025] Reference signs are indicated as follows:

[0026] 1, stationary scroll plate; 2, orbiting scroll plate; 3, upper bracket; 4, shaft sleeve; 41, shaft sleeve limiting groove; 42, oil hole; 43, groove; 5, control block; 6, main shaft; 61, shaft limiting groove; 62, cut edge; 63, oil passage; 7, oil groove. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the following will be a clear and complete description of the technical solutions of the present application in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0029] Reference should be made to Figures 1 to 5 According to an embodiment of the present application, a pump body assembly is shown, comprising:

[0030] A rotating shaft and a shaft sleeve 4, the shaft sleeve 4 is provided with an eccentric hole, one end of the rotating shaft is arranged in the eccentric hole; the outer wall of the rotating shaft and the inner wall of the eccentric hole are provided with limiting grooves on the opposite surfaces, and when the two limiting grooves are opposite, a limiting hole is formed.

[0031] A control block 5 is slidably arranged in or out of the limiting hole; when the control block 5 is slid into the limiting hole, the rotating shaft and the shaft sleeve 4 are synchronized; when the control block 5 is slid out of the limiting hole, the rotating shaft and the shaft sleeve 4 can rotate relative to each other.

[0032] The application adjusts the relative position of the control block 5 and the limiting hole to adjust the interaction between the rotating shaft and the shaft sleeve 4, and the connection or disconnection of the rotating shaft and the shaft sleeve 4 can be selected according to the use requirement, so that whether the pump body operates can be selected when the oil surface of the high-pressure oil groove 7 on the back of the moving scroll plate 2 changes, and the phenomenon of pump body oil shortage operation caused by insufficient oil supply to the pump body end surface due to too low oil level can be avoided.

[0033] In some embodiments, the two limiting grooves are arranged along the axial direction of the rotating shaft, and the control block 5 is slid into or out of the limiting hole along the axial direction of the rotating shaft.

[0034] The axial extension arrangement of the two limiting grooves facilitates the axial sliding of the control block 5 into or out of the limiting hole. Since the control block 5 enters the limiting hole and is clamped in the two limiting grooves, the rotating shaft and the shaft sleeve 4 cannot move relative to each other, so the rotation of the rotating shaft necessarily drives the synchronous rotation of the shaft sleeve 4. When the control block 5 slides out of the limiting hole, the rotating shaft and the shaft sleeve 4 rotate relative to each other, that is, the rotating shaft rotates by itself, and the shaft sleeve 4 is in a static state.

[0035] In some embodiments, the axial direction of the rotating shaft is vertically arranged; the pump body assembly further comprises an oil groove 7, and the limiting hole is arranged in the oil groove 7; the density of the control block 5 is less than the density of the oil in the oil groove 7, and the control block 5 slides into or out of the limiting hole along with the change of the oil level of the oil.

[0036] The control block can adopt the buoyancy of the oil in the oil groove to slide into or slide out of the limiting hole. In the structure of the scroll compressor, the lubricating oil at the bottom of the compressor is supplied to the top surface of the crankshaft through the oil passage 63, and then reaches the oil groove 7. When the compressor is supplied with sufficient oil, the oil level in the oil groove 7 is higher than the connecting height (the connecting height is designed based on the oil supply mode of the pump body, and the safe oil level is calculated). The control block 5 floats to the connecting height, and the main shaft 6 and the shaft sleeve 4 are connected through the shaft sleeve limiting groove 41. At this time, the two rotate together to drive the orbiting scroll to rotate. At this time, the compressor works. When the oil level in the oil groove 7 is lower than the connecting height due to lack of oil at the bottom of the compressor or the compressor is started, the control block 5 is lowered below the connecting height, and the main shaft 6 and the shaft sleeve 4 are disconnected. At this time, the two are separated, and the orbiting scroll stops rotating. At this time, the pump body stops working.

[0037] In some embodiments, the eccentric hole is a blind hole structure, and the shaft sleeve 4 is covered on one end of the rotating shaft. Preferably, the opening end of the shaft sleeve 4 is provided with a groove 43, and the control block 5 is arranged in the groove 43 when sliding out of the limiting hole. More preferably, the side wall of the groove 43 is provided with oil holes 42, and the oil holes 42 are uniformly distributed along the circumferential wall of the groove 43.

[0038] The shaft sleeve 4 is connected to the end of the rotating shaft in a covering manner to protect the connection position of the two, and the groove 43 and the oil holes 42 on the side wall thereof facilitate the control valve to be in an oil environment, and facilitate the sliding into or out of the limiting hole.

[0039] According to another aspect of the present application, a scroll compressor is provided, which comprises the pump body assembly as described above.

[0040] In some embodiments, the scroll compressor further comprises an orbiting scroll 2, and the rotating shaft is connected to the orbiting scroll 2 through the shaft sleeve 4.

[0041] The orbiting scroll 2 is connected to the rotating shaft through the shaft sleeve 4, and the separability of the rotating shaft and the shaft sleeve 4 can prevent the rotating shaft from continuously driving the orbiting scroll 2 to rotate in the case of lack of oil, thereby reducing wear.

[0042] In some embodiments, the rotating shaft comprises a main shaft 6, and one end of the rotating shaft is provided in a stepped shape with an outer diameter smaller than that of the main shaft 6. When the pump body assembly comprises an oil groove 7, the scroll compressor further comprises an upper support 3, and the oil groove 7 is arranged on the upper support 3 to form a groove structure surrounded by the upper support 3 and the main shaft 6.

[0043] The end of the rotating shaft in the scroll compressor is provided in a stepped structure to facilitate the covering of the shaft sleeve 4, and the oil groove 7 surrounded by the upper support 3 and the main shaft 6 enables the limiting hole and the control block 5 to be in the oil in the oil groove 7, thereby facilitating the sliding in or out of the control block 5.

[0044] In some embodiments, the center of the rotating shaft is provided with an oil passage 63, the upper end of which is communicated with the gap between the rotating shaft and the sleeve 4, and the lower end of which is communicated with the oil pool at the bottom of the scroll compressor.

[0045] The rotating shaft center oil passage 63 conducts oil to the gap between the rotating shaft and the sleeve 4, which can ensure the lubrication of the two, and at the same time ensure the floating force of the oil in the oil groove 7 on the control block 5, so as to facilitate the oil shortage protection of the pump body.

[0046] The scroll compressor of the present application drives the bottom oil supply structure by the main shaft 6, supplies the lower lubricating oil of the compressor to the oil groove 7 formed by the back of the orbiting scroll and the upper bracket through the oil passage 63, and then supplies the pump body through the pump body oil supply structure in the upper bracket, so as to ensure the lubrication during the operation of the orbiting scroll and the fixed scroll.

[0047] It is easy for those skilled in the art to understand that the above-mentioned embodiments can be freely combined and superimposed without conflict.

[0048] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, which should be regarded as the protection scope of the present application.

Claims

1. A pump body assembly, characterized by, The pump body assembly comprises: a rotating shaft and a shaft sleeve (4), the shaft sleeve (4) is provided with an eccentric hole, one end of the rotating shaft is arranged in the eccentric hole; a limiting groove is arranged on the opposite surface of the outer wall of the rotating shaft and the inner wall of the eccentric hole, and when the two limiting grooves are opposite, a limiting hole is formed; a control block (5) which can be slidably arranged in or out of the limiting hole; when the control block (5) is slid into the limiting hole, the rotating shaft and the shaft sleeve (4) rotate synchronously; when the control block (5) is slid out of the limiting hole, the rotating shaft and the shaft sleeve (4) can rotate relatively. The scroll compressor comprises a movable scroll plate (2), the rotating shaft is connected with the movable scroll plate (2) through the shaft sleeve (4).

2. The pump body assembly of claim 1, wherein, The two limiting grooves are arranged along the axial direction of the rotating shaft, and the control block (5) is slid in or out of the limiting hole along the axial direction of the rotating shaft.

3. The pump body assembly of claim 2, wherein, The axial direction of the rotating shaft is arranged vertically; the pump body assembly further comprises an oil groove (7), and the limiting hole is arranged in the oil groove (7); the density of the control block (5) is less than the density of oil in the oil groove (7), and the control block (5) slides in or out of the limiting hole along with the change of the oil level of the oil.

4. The pump body assembly of claim 3, wherein, The eccentric hole is a blind hole structure, and the shaft sleeve (4) is arranged on one end of the rotating shaft.

5. The pump body assembly of claim 4, wherein, The opening end of the shaft sleeve (4) is provided with a recess (43), and the control block (5) is arranged in the recess (43) when the control block (5) is slid out of the limiting hole.

6. The pump body assembly of claim 5, wherein, An oil hole (42) is arranged on the side wall of the recess (43), and a plurality of oil holes (42) are uniformly distributed along the circumferential wall of the recess (43).

7. A scroll compressor characterized by The pump body assembly comprises the pump body assembly according to any one of claims 1-6.

8. The scroll compressor of claim 7, wherein, The rotating shaft comprises a main shaft (6), and one end of the rotating shaft is arranged in a stepped structure with an outer diameter smaller than that of the main shaft (6); when the pump body assembly comprises an oil groove (7), the scroll compressor further comprises an upper support (3), and the oil groove (7) is arranged on the upper support (3) to form a groove structure surrounded by the upper support (3) and the main shaft (6).

9. The scroll compressor of claim 8, wherein, An oil channel (63) is arranged at the center of the rotating shaft, the upper end of the oil channel (63) is communicated with the gap between the rotating shaft and the shaft sleeve (4), and the lower end of the oil channel (63) is communicated with an oil pool at the bottom of the scroll compressor.

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