Novel electric scroll compressor

Abstract

The utility model relates to a novel electric scroll compressor which comprises a motor shell, an end cover is installed at the end of the motor shell, an exhaust oil return cavity is formed in the end cover, a bearing seat is installed in the motor shell, a main bearing is installed in the bearing seat, a crankshaft is sleeved on the main bearing, a movable disc is installed at the end of the crankshaft, and a static disc is meshed with the end face of the movable disc. The end face of the static disc is connected with the end cover, a spiral sealing strip is arranged on the meshed disc face of the static disc and the movable disc, an elastic strip is arranged on the sealing strip, a back pressure cavity is formed between the movable disc and the bearing seat, a low pressure cavity is formed between the bearing seat and the motor shell, and a high pressure cavity is formed between the static disc and the end cover. A wear-resisting pad is installed between the end face, away from the static disc, of the movable disc and the bearing seat, a pressure guiding hole is formed in the movable disc and used for communicating the back pressure cavity with the high-pressure cavity, and the exhaust oil return cavity communicates with the low-pressure cavity through an oil return pipeline. The durability and reliability of the compressor are improved, and the compressor can adapt to different application working condition environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, concretely relates to a novel electric scroll compressor. BACKGROUND

[0002] Due to the particularity of electric vehicles, it is necessary to meet its energy saving and environmental protection, and increase the vehicle endurance mileage, in order to meet the requirement of electric vehicles to each part small and light, the electric compressor is as small as possible in volume and weight, only by improving the speed can meet the requirement of the whole vehicle to refrigerating capacity. The vortex structure is suitable for high speed, and the efficiency is higher under high speed working condition, from the characteristics of various compressors, only the vortex structure is most suitable for the requirement of electric compressor, there are many electric compressor manufacturers in the market at present, and various products, but there are generally problems of poor durability and reliability, easy wear of dynamic and static disc, causing customer complaints. UTILITY MODEL CONTENTS

[0003] In order to solve the problems in the background art, the utility model provides a novel electric scroll compressor, the utility model improves the durability and reliability of the compressor, and can adapt to different application working conditions.

[0004] In order to solve the above problems, the utility model adopts the following technical scheme: a novel electric scroll compressor, including motor shell, the end of motor shell is installed with end cover, the end cover is opened with exhaust back oil cavity, the inside of motor shell is installed with bearing seat, the bearing seat is installed with main bearing, the main bearing is equipped with crankshaft, one end of crankshaft is rotatably connected with the end wall of motor shell, the other end is installed with dynamic disc, the end surface of dynamic disc is engaged with static disc, the end surface of static disc is connected with end cover, characterized by: the meshing disc surface of static disc and dynamic disc is provided with sealing strip in the form of scroll, the sealing strip is provided with elastic strip, the back pressure cavity is formed between dynamic disc and bearing seat, the low pressure cavity is formed between bearing seat and motor shell, the high pressure cavity is formed between static disc and end cover, the wear pad is installed between the end surface of dynamic disc away from static disc and bearing seat, the lead pressure hole is opened in dynamic disc, the lead pressure hole is used for connecting back pressure cavity and high pressure cavity, the exhaust back oil cavity and low pressure cavity are communicated through oil return pipeline.

[0005] Further, the oil return pipeline includes the oil return inclined hole and the oil return straight hole which are opened in the static disc and are communicated with each other, the oil return inclined hole is communicated with the exhaust back oil cavity, the arc-shaped groove is opened at the edge of the wear pad, the arc-shaped groove, the end surface of the static disc and the end surface of the bearing seat form the oil return capillary channel, the oil return straight hole is communicated with the oil return capillary channel, and the oil return capillary channel is communicated with the low pressure cavity.

[0006] Further, the outer end of the exhaust back oil chamber is provided with an exhaust plugging assembly through a plugging bolt, the inner upper end of the exhaust back oil chamber is provided with a conical pipe, and the inner lower end of the exhaust back oil chamber is provided with a filter screen.

[0007] Still further, the end face of the static disc close to the end cover is provided with at least two first positioning pins at intervals, the at least two first positioning pins are used for being connected with at least two first positioning holes of the end cover in a one-to-one matching manner, and the end face of the static disc away from the end cover is provided with a plurality of second positioning pins at intervals, the plurality of second positioning pins are arranged in the wear-resistant pad and connected with a plurality of second positioning holes of the bearing seat in a one-to-one matching manner.

[0008] Further, the static disc is provided with an exhaust hole in the center, a valve plate is arranged on the exhaust hole, a limiting plate is arranged on the valve plate, fastening bolts are sequentially arranged on the limiting plate and the valve plate, and inner ends of the fastening bolts are detachably connected with the static disc.

[0009] Further, the end face of the dynamic disc close to the bearing seat is uniformly provided with a plurality of slip ring holes, the plurality of slip ring holes are used for matching and mounting a slip ring, a plurality of third positioning holes are arranged on the wear-resistant pad corresponding to the plurality of slip ring holes, and a plurality of positioning pins of the bearing seat are sequentially arranged in the plurality of third positioning holes and connected with the plurality of slip ring holes of the dynamic disc.

[0010] Further, the end portion of the crankshaft close to the end cover is provided as an eccentric shaft, an eccentric block is arranged on the eccentric shaft, and the eccentric block is connected with the dynamic disc and the bearing seat.

[0011] Further, the bearing seat is provided with a oil discharging hole, the inner end of the oil discharging hole is connected with the back pressure cavity, the outer wall of the bearing seat and the inner wall of the motor shell form a gap space, and the outer end of the oil discharging hole and the gap space form a gap oil discharging valve.

[0012] Further, the end cover is provided with an overpressure protector.

[0013] Still further, the motor shell is provided with an air suction plugging assembly.

[0014] The utility model discloses an axial compensation structure of scroll type line is formed to the end face of dynamic disc and static disc through setting sealing strip and elastic strip, and the oil film is combined to reduce the friction of scroll end face, and better sealing effect is played simultaneously, so that the volumetric efficiency of compressor is improved, thereby reducing the loss of electric power. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further explained below in connection with the drawings and examples.

[0016] Figure 1 It is the sectional view of the utility model.

[0017] Figure 2 It is the side view of the utility model;

[0018] Figure 3 It is the sectional view of end cover;

[0019] Figure 4 It is the first side view of dynamic disc;

[0020] Figure 5 It is the second side view of dynamic disc;

[0021] Figure 6 It is the side view of static disc;

[0022] Figure 7 It is the sectional view of static disc;

[0023] Figure 8 It is the partial sectional view of static disc;

[0024] Figure 9 It is the structure schematic diagram of wear -resisting pad;

[0025] Figure 10 It is the side view of bearing seat.

[0026] 1, motor housing; 2, end cover; 3, exhaust back oil cavity; 4, bearing seat; 5, main bearing; 6, crankshaft; 7, dynamic disc; 8, static disc; 9, sealing strip; 10, elastic strip; 11, back pressure cavity; 12, low pressure cavity; 13, high pressure cavity; 14, wear pad; 15, pressure guiding hole; 16, oil return pipeline; 17, oil return inclined hole; 18, oil return straight hole; 19, oil return capillary channel; 20, plugging bolt; 21, exhaust plugging assembly; 22, cone pipe; 23, filter screen; 24, first positioning pin; 25, second positioning pin; 26, exhaust hole; 27, valve piece; 28, limiting plate; 29, fastening bolt; 30, slip ring hole; 31, eccentric shaft; 32, eccentric block; 33, oil discharge hole; 34, overpressure protector; 35, suction plugging assembly. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] The utility model discloses a sealing strip 9 and elastic strip 10 are arranged on the end surface of dynamic disc 7 and static disc 8, and the axial compensation structure of vortex shape line is formed, which combines oil film to reduce the friction of vortex disc end surface, and better sealing effect is achieved, so that the volumetric efficiency of compressor is improved, thereby reducing the loss of electric power. The end surface of bearing seat 4 is matched with wear pad 14, so that dynamic disc 7 plays a certain axial floating and compensation effect under the elastic effect of wear pad 14, and oil return pipeline 16 is connected with exhaust back oil cavity 3 and low pressure cavity 12, so that the refrigeration oil flows from exhaust back oil cavity 3 to low pressure cavity 12 under the centrifugal force and gravity, and plays a lubricating sealing role. Compared with the traditional electric compressor, the utility model improves the refrigeration performance of the compressor, reduces the electric power loss, and improves the cruising range of the electric vehicle, and the axial compensation improves the durability and reliability of the compressor, and can adapt to different application working conditions.

[0029] Specifically, as Figures 1 to 3As shown, a new electric scroll compressor, comprising a motor housing 1, the end of the motor housing 1 is provided with an end cover 2, the end cover 2 is provided with a discharge back oil cavity 3, the inside of the motor housing 1 is provided with a bearing seat 4, the bearing seat 4 is provided with a main bearing 5, the main bearing 5 is provided with a crankshaft 6, one end of the crankshaft 6 is rotatably connected with the end wall of the motor housing 1, the other end is provided with a moving disc 7, the end surface of the moving disc 7 is engaged with a static disc 8, the end surface of the static disc 8 is connected with the end cover 2, characterized in that: the meshing disc surface of the static disc 8 and the moving disc 7 is provided with a sealing strip 9 in the shape of a scroll, the sealing strip 9 is provided with an elastic strip 10, the moving disc 7 and the bearing seat 4 form a back pressure cavity 11, the bearing seat 4 and the motor housing 1 form a low pressure cavity 12, the static disc 8 and the end cover 2 form a high pressure cavity 13, the end surface of the moving disc 7 away from the static disc 8 and the bearing seat 4 are provided with a wear-resistant pad 14, the moving disc 7 is provided with a pressure guiding hole 15, the pressure guiding hole 15 is used for connecting the back pressure cavity 11 and the high pressure cavity 13, the discharge back oil cavity 3 and the low pressure cavity 12 are connected through an oil return pipeline 16.

[0030] Further, as shown in Figure 1 、 Figures 6 to 9 , the oil return pipeline 16 comprises an oil return inclined hole 17 and an oil return straight hole 18 which are communicated with each other and are provided on the static disc 8, the oil return inclined hole 17 is communicated with the discharge back oil cavity 3, the edge of the wear-resistant pad 14 is provided with an arc-shaped groove, the arc-shaped groove and the end surface of the static disc 8 and the end surface of the bearing seat 4 form an oil return capillary channel 19, the oil return straight hole 18 is communicated with the oil return capillary channel 19, and the oil return capillary channel 19 is communicated with the low pressure cavity 12.

[0031] Further, as shown in Figure 2 、 Figure 3 , the outer end of the discharge back oil cavity 3 is provided with an exhaust plugging assembly 21 through a plugging bolt 20, the inner upper end of the discharge back oil cavity 3 is provided with a tapered pipe 22, and the inner lower end of the discharge back oil cavity 3 is provided with a filter screen 23.

[0032] Further, as shown in Figure 6 、 Figure 7 , the end surface of the static disc 8 close to the end cover 2 is provided with at least two first positioning pins 24 at intervals, and the at least two positioning pins are used for being connected with at least two first positioning holes provided on the end cover 2 in a one-to-one matching manner, and the end surface of the static disc 8 away from the end cover 2 is provided with a plurality of second positioning pins 25 at intervals, and the plurality of second positioning pins 25 are provided through the wear-resistant pad 14 and are connected with a plurality of second positioning holes on the bearing seat 4 in a one-to-one matching manner.

[0033] Further, as shown in Figure 6、 Figure 7 As shown in the drawings, the center of the static disc 8 is provided with an exhaust hole 26, the valve plate 27 is arranged on the exhaust hole 26, the limiting plate 28 is arranged on the valve plate 27, the fastening bolt 29 is sequentially arranged on the limiting plate 28 and the valve plate 27, and the inner end of the fastening bolt 29 is detachably connected with the static disc 8.

[0034] Further, as shown in the drawings, Figure 4 、 Figure 5 As shown in the drawings, the end face of the dynamic disc 7 close to the bearing seat 4 is uniformly and spacedly provided with a plurality of slip ring holes 30, the plurality of slip ring holes 30 are used for matching and installing a slip ring, a plurality of third positioning holes are arranged on the wear-resistant pad 14 corresponding to the plurality of slip ring holes 30, and the plurality of positioning pins of the bearing seat 4 are sequentially arranged in the plurality of third positioning holes and connected with the plurality of slip ring holes 30 of the dynamic disc 7.

[0035] Further, as shown in the drawings, Figure 1 As shown in the drawings, the crankshaft 6 close to the end cover 2 is provided as an eccentric shaft 31, the eccentric block 32 is sleeved on the eccentric shaft 31, and the eccentric block 32 is connected with the dynamic disc 7 and the bearing seat 4. The bearing seat 4 is also provided with a sliding shaft sleeve, the sliding shaft sleeve is sleeved on the crankshaft 6, the sliding shaft sleeve reduces the linear speed of the shaft head of the eccentric block 32, replaces the steel balls in the deep groove ball bearing and the needle roller bearing and the needle roller in the prior art, reduces the noise generated by rotation, and the crankshaft 6 is provided with a noise reduction rubber ring, so that the contact between the eccentric block 32 and the crankshaft 6 is soft contact, and the collision noise during starting and stopping is reduced.

[0036] Further, as shown in the drawings, Figure 10 As shown in the drawings, the bearing seat 4 is provided with a oil discharge hole 33, the inner end of the oil discharge hole 33 is connected with the back pressure cavity 11, the gap space is formed between the outer wall of the bearing seat 4 and the inner wall of the motor shell 1, and the outer end of the oil discharge hole 33 forms a gap oil discharge valve with the gap space.

[0037] Further, as shown in the drawings, Figure 1 As shown in the drawings, the end cover 2 is provided with an overpressure protector 34.

[0038] Further, as shown in the drawings, Figure 2 As shown in the drawings, the motor shell 1 is provided with an air suction plugging assembly 35.

[0039] The utility model discloses a sealing strip 9 and elastic strip 10 are set up to the end face of the dynamic disc 7, static disc 8 and form the axial compensation structure of vortex shape line, combine oil film to reduce the friction of scroll end face, play better sealing effect simultaneously, make compressor volumetric efficiency improve to reduce the loss of electric power. Through the end face of bearing seat 4 and wear -resisting pad 14 cooperation, make dynamic disc 7 play certain axial floating and compensation effect under the elastic action of wear -resisting pad 14, and through oil return pipeline 16 intercommunication exhaust return oil chamber 3 with low pressure chamber 12, make the refrigeration oil flow from exhaust return oil chamber 3 to low pressure chamber 12 under the centrifugal force and gravity, play the role of lubrication seal. Compared with traditional electric compressor, the utility model discloses make the refrigeration performance of compressor improve, reduce the electric power loss, and then improve the electric car cruising range, axial compensation makes the compressor durability reliability improve, can adapt to different application working condition environment, and the compact structure of complete machine, low noise, light weight, small, it is small.

[0040] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement, improvement etc. that are made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A novel electric scroll compressor, comprising a motor housing (1), an end cover (2) installed at one end of the motor housing (1), an exhaust oil return chamber (3) formed inside the end cover (2), a bearing housing (4) installed inside the motor housing (1), a main bearing (5) installed inside the bearing housing (4), a crankshaft (6) sleeved on the main bearing (5), one end of the crankshaft (6) being rotatably connected to the end wall of the motor housing (1), and a moving disc (7) installed at the other end, a stationary disc (8) meshing with the end face of the moving disc (7), the end face of the stationary disc (8) being connected to the end cover (2), characterized in that: A spiral-shaped sealing strip (9) is provided on the meshing surface of the stationary disc (8) and the moving disc (7). An elastic strip (10) is provided on the sealing strip (9). A back pressure cavity (11) is formed between the moving disc (7) and the bearing seat (4). A low pressure cavity (12) is formed between the bearing seat (4) and the motor housing (1). A high pressure cavity (13) is formed between the stationary disc (8) and the end cover (2). A wear-resistant pad (14) is installed between the end face of the moving disc (7) away from the stationary disc (8) and the bearing seat (4). A pressure-guiding hole (15) is opened on the moving disc (7). The pressure-guiding hole (15) is used to connect the back pressure cavity (11) and the high pressure cavity (13). The exhaust oil return cavity (3) and the low pressure cavity (12) are connected through the oil return pipeline (16).

2. The novel electric scroll compressor according to claim 1, characterized in that: The oil return pipeline (16) includes an oil return inclined hole (17) and an oil return straight hole (18) that are interconnected on the stationary plate (8). The oil return inclined hole (17) is connected to the exhaust oil return chamber (3). An arc-shaped groove is provided at the edge of the wear-resistant pad (14). The arc-shaped groove, the end face of the stationary plate (8), and the end face of the bearing seat (4) form an oil return capillary pipe (19). The oil return straight hole (18) is connected to the oil return capillary pipe (19). The oil return capillary pipe (19) is connected to the low-pressure chamber (12).

3. A novel electric scroll compressor according to claim 1, characterized in that: The exhaust return oil chamber (3) has an exhaust sealing assembly (21) installed at its outer end by a sealing bolt (20). A tapered tube (22) is press-fitted into the upper part of the exhaust return oil chamber (3), and a filter screen (23) is provided at the lower part of the exhaust return oil chamber (3).

4. A novel electric scroll compressor according to claim 1, characterized in that: Two first positioning pins (24) are spaced apart on the end face of the stationary disc (8) near the end cover (2). At least two of the positioning pins are used to engage with the two first positioning holes on the end cover (2). Multiple second positioning pins (25) are spaced apart on the end face of the stationary disc (8) away from the end cover (2). The multiple second positioning pins (25) pass through the wear-resistant pad (14) and engage with the multiple second positioning holes on the bearing seat (4).

5. A novel electric scroll compressor according to claim 1, characterized in that: The center of the stationary plate (8) has an exhaust hole (26), the exhaust hole (26) is covered with a valve plate (27), the valve plate (27) is covered with a limiting plate (28), and fastening bolts (29) are sequentially inserted through the limiting plate (28) and the valve plate (27). The inner end of the fastening bolt (29) is detachably connected to the stationary plate (8).

6. A novel electric scroll compressor according to claim 1, characterized in that: The moving disk (7) has a plurality of slip ring holes (30) evenly spaced on its end face near the bearing seat (4). The plurality of slip ring holes (30) are used to fit and install slip rings. The wear-resistant pad (14) has a plurality of third positioning holes corresponding to the plurality of slip ring holes (30). The plurality of positioning pins of the bearing seat (4) are sequentially inserted into the plurality of third positioning holes and connected to the plurality of slip ring holes (30) of the moving disk (7).

7. A novel electric scroll compressor according to claim 1, characterized in that: The crankshaft (6) is configured as an eccentric shaft (31) at the end near the end cover (2), and an eccentric block (32) is sleeved on the eccentric shaft (31). The eccentric block (32) is connected to the moving disc (7) and the bearing seat (4).

8. A novel electric scroll compressor according to claim 1, characterized in that: The bearing housing (4) is provided with an oil drain hole (33), the inner end of the oil drain hole (33) is connected to the back pressure cavity (11), a gap space is formed between the outer wall of the bearing housing (4) and the inner wall of the motor housing (1), and the outer end of the oil drain hole (33) and the gap space form a gap oil drain valve.

9. A novel electric scroll compressor according to any one of claims 1 to 8, characterized in that: An overpressure protector (34) is provided on the end cap (2).

10. A novel electric scroll compressor according to any one of claims 1 to 8, characterized in that: An air intake sealing assembly (35) is provided on the motor housing (1).

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