Flange and pump body assembly having same

Abstract

A flange and a pump body assembly having the same are disclosed. The flange includes a flange body 10, a shaft hole 11 formed in the flange body 10, a back pressure groove 12 formed on one side of the shaft hole 11, and a communication portion 13 formed on a side wall of the back pressure groove 12 adjacent to the one side of the shaft hole 11, the communication portion 13 connecting the back pressure groove 12 to the shaft hole 11 and configured to supply lubricating oil to or discharge lubricating oil from the back pressure groove 12. The fact that the communication portion 13 is formed on the side wall of the back pressure groove 12 of the flange body 10 adjacent to the one side of the shaft hole 11 and that lubricating oil can be introduced into the back pressure groove 12 in a timely manner through the communication portion 13 avoids the problem of unsmooth oil supply resulting from oil being supplied through a gap formed between the flange and the main shaft 30 in the related art. By using a flange having the above structure, the lubricating oil can smoothly enter the back pressure groove 12, and a stable and reliable oil pressure can be provided at the tail of the sliding part 40 at each angle at which the sliding part 40 extends, and stable operation can also be maintained at the maximum extension and retraction speeds, thereby effectively improving the stability and reliability of the pump body assembly having the above flange.

Description

[Technical field]

[0001] This disclosure is based on and claims priority to Chinese Patent Application No. 202010606496.2, filed on June 29, 2020, the disclosure of which is incorporated herein by reference in its entirety.

[0002] The present disclosure relates to the technical field of pump body equipment, and more particularly to a flange and a pump body assembly having the same. [Background technology]

[0003] Compared with other types of compressors, sliding vane compressors have the advantages of simple parts, no eccentric structure, smooth torque, and low vibration. The sliding vanes are pushed out of the sliding vane grooves by centrifugal force or sliding vane back pressure, and then abut against the inner wall of the cylinder to form a seal, so a stable and reliable sliding vane back pressure is an important factor affecting the quality of sliding vane compressors.

[0004] In the rotary vane compressor of the related art, in order to ensure that the sliding vane can be smoothly extended outward during operation, a back pressure chamber (sliding vane tail chamber formed by the sliding vane and sliding vane groove of the main shaft, the upper flange back pressure groove, and the lower flange back pressure groove) is generally provided at the tail of the sliding vane, and high pressure oil is introduced from the oil pool to provide a driving force to the rear of the sliding vane to overcome the gas pressure from the chambers before and after the sliding vane head, and the friction on the side of the sliding vane groove, and to achieve that the sliding vane head always contacts the inside of the cylinder during the entire operation process.

[0005] The oil for the back pressure of the sliding vane is mainly pumped from the oil pool by the gear type oil pump, and then enters the flange back pressure groove through the central hole of the main shaft and the side hole of the main shaft connected with the central hole of the main shaft, thereby filling the back pressure chamber.

[0006] Regarding the back pressure structure in the related art, the oil from the side hole of the main shaft needs to pass through a certain gap before entering, as shown in Figure 1. According to the law of the sliding vane's motion, the sliding vane reciprocates in the sliding vane groove at a periodically changing speed. When the sliding vane extends at a high speed, the volume of the tail chamber of the sliding vane increases rapidly, and it is difficult for the back pressure oil to be replenished in a timely manner. If the oil is not replenished in a timely manner, especially during the high frequency operation of the compressor, the back pressure of the sliding vane will decrease, resulting in insufficient back pressure of the sliding vane, thus, under the action of the gas pressure from the chambers on both sides of the sliding vane, the head of the sliding vane will separate from the inner wall of the cylinder, resulting in leakage that affects the performance of the compressor, and when the sliding vane extends out again, it will collide with the inner wall of the cylinder, thereby affecting the reliability of the compressor. Furthermore, when the sliding vane retracts at high speed, the oil in the sliding vane tail chamber cannot be discharged in time, resulting in too high back pressure, and increasing the friction between the sliding vane head and the inner wall of the cylinder, increasing the power consumption, thereby affecting the energy efficiency and reliability of the compressor. Summary of the Invention [Means for solving the problem]

[0007] According to one aspect of an embodiment of the present disclosure, there is provided a flange including a flange body having an axial hole formed therein, wherein a back pressure groove is provided in addition to the axial hole, and a communication portion is provided in a side wall of the back pressure groove adjacent to the axial hole, the communication portion connects the back pressure groove to the axial hole, and the communication portion is configured to supply lubricating oil to the back pressure groove or drain lubricating oil from the back pressure groove.

[0008] In some embodiments, the communication portion includes a notch in a sidewall of the backpressure groove, and / or the communication portion includes a through hole structure in a sidewall of the backpressure groove.

[0009] In some embodiments, a plurality of communication portions are provided, the plurality of communication portions being spaced apart and disposed around the axial bore.

[0010] In some embodiments, the communication portion includes a first notch, the backpressure groove has a first location on a sidewall adjacent to the bore, the first notch is formed at the first location, an included angle α1 is formed by a connecting line between opposite ends of the first notch and a center of the bore, A-50°≦α1≦A+50°, A is the angle of rotation when the sliding vane begins to extend from a first initial position out of the sliding vane groove until the speed of the sliding vane reaches its maximum.

[0011] In some embodiments, the communication portion further includes a second notch, the second notch being spaced apart from the first notch, the backpressure groove having a second location on the sidewall adjacent the bore, the second notch being formed at the second location, an included angle α2 being formed by a connecting line between opposite ends of the second notch and a center of the bore, B-50°≦α2≦B+50°, where B is the angle of rotation of the sliding vane as it begins to retract from the second initial position towards the sliding vane groove until the speed of the sliding vane reaches its maximum.

[0012] In some embodiments, the communication portion is configured in an arc shape, and an included angle θ is formed by the connecting lines between the two ends of the communication portion and the center of the shaft hole, and is A-50°≦θ≦B+50° or A-30°≦θ≦B+30°, where A is the angle of rotation until the sliding vane speed reaches its maximum when it begins to extend out of the sliding vane groove, and B is the angle of rotation until the sliding vane speed reaches its maximum when it begins to retract into the sliding vane groove.

[0013] In some embodiments, the communicating portion is a notch formed in a side wall of the backpressure groove, the height difference between the notch and the flange surface is H1, the depth of the backpressure groove is H2, the thickness of the flange body is H, the ratio of H2 to H is in the range of 0.1 to 0.6, and the ratio of H1 to H2 is in the range of 0.1 to 1.

[0014] In some embodiments, H1 > 1 mm.

[0015] In another aspect of an embodiment of the present disclosure, a pump body assembly is provided that includes the flange of the above embodiment.

[0016] In some embodiments, the pump body assembly further includes a cylinder, the flange body being disposed on a side of the cylinder, and a main shaft having a central portion, at least one of at least one sliding vane grooves being formed in the central portion, a sliding vane being provided in each sliding vane groove, an axial hole extending through the main shaft, the central portion being disposed in the cylinder, the main shaft being configured to rotationally drive the sliding vanes to perform a compression action in the cylinder.

[0017] In some embodiments, by providing a communication part on the side wall of the back pressure groove of the flange body on the side close to the shaft hole, the lubricating oil is conveyed to the back pressure groove by the communication part in a timely manner, thus avoiding the problem of unsmooth oil supply caused by the oil supply through the gap formed between the flange and the main shaft in the related art. By using a flange with this structure, the lubricating oil can smoothly enter the back pressure groove, so that a stable and reliable oil pressure can be provided at the tail of the sliding vane at each angle of the sliding vane extension, and the stable operation can be maintained even at the maximum extension and retraction speed, thus effectively improving the stability and reliability of the pump body assembly with the flange.

[0018] The drawings illustrated in this specification are used to provide a further understanding of the present disclosure and form a part of the present disclosure, and the exemplary embodiments of the present disclosure and the description thereof are intended to explain, rather than unduly limit, the present disclosure. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of the supply of lubricating oil through a gap between a flange and a main shaft in the related art. [Diagram 2] FIG. 2 is a structural diagram of a first embodiment of a flange according to the present disclosure. [Diagram 3] FIG. 3 is a cross-sectional view of FIG. 2 taken along line AA. [Figure 4] FIG. 4 is a structural diagram of a second embodiment of a flange according to the present disclosure. [Diagram 5] FIG. 11 is a structural diagram of a third embodiment of a flange according to the present disclosure. [Figure 6] FIG. 13 is a structural diagram of a fourth embodiment of a flange according to the present disclosure. [Figure 7] FIG. 7 is a cross-sectional view of FIG. 6 taken along line BB. [Figure 8] FIG. 13 is a structural diagram of a fifth embodiment of a flange according to the present disclosure. [Figure 9]FIG. 10 is a comparison diagram of pressure at a back pressure groove formed in a flange provided according to some embodiments of the present disclosure and pressure at a back pressure groove formed in a flange in the related art. [Figure 10] 1 is a structural diagram of a pump body assembly provided in accordance with some embodiments of the present disclosure. [Figure 11] 1 is a schematic diagram of the relationship between the moving speed and the rotation angle of a sliding vane provided in accordance with some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The technical solutions in the embodiments are clearly and thoroughly described below in the embodiments of the present disclosure with accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, and are not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without inventive ideas shall be included in the protection scope of the present disclosure.

[0021] In describing the present disclosure, the directions or positional relationships represented by the terms "center," "vertical," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "inner," "outer," etc. are directions or positional relationships illustrated based on the drawings, and do not indicate or imply that the depicted devices or elements have a particular orientation or should be constructed and operated in a particular orientation, but are merely for the convenience of explaining and simplifying the description of the present disclosure, and therefore, it should be recognized that the terms cannot be construed to limit the scope of protection of the present disclosure.

[0022] Some embodiments of the present disclosure provide a flange and a pump body assembly having the flange to alleviate a problem of non-smooth oil supply to a sliding vane back pressure chamber in the related art.

[0023] As shown in Figures 2-10, according to some embodiments of the present disclosure, a flange is provided.

[0024] The flange includes a flange body 10. The flange body 10 has an axial hole 11 formed therein. On the axial hole 11 side, a back pressure groove 12 is provided around the axial hole 11. A communication portion 13 is provided in a side wall of the back pressure groove 12 on the side adjacent to the axial hole 11. The communication portion 13 communicates the back pressure groove 12 with the axial hole 11, and the communication portion 13 is configured to supply lubricating oil to the back pressure groove 12 or discharge lubricating oil from the back pressure groove 12.

[0025] In this embodiment, by providing a communication part 13 on the side wall of the back pressure groove 12 of the flange body 10 on the side close to the shaft hole 11, the lubricating oil is timely conveyed to the back pressure groove 12 by the communication part 13, thus avoiding the problem of unsmooth oil supply caused by supplying oil through the gap formed between the flange and the main shaft in the related art. By using a flange having this structure, the lubricating oil can smoothly enter the back pressure groove 12, so that a stable and reliable oil pressure can be provided at the tail of the sliding vane at each angle that the sliding vane extends, and stable operation can be maintained even at the maximum speed of the sliding vane extending and retracting, thus efficiently improving the stability and reliability of the pump body assembly with the flange.

[0026] The communication portion 13 may be a notch formed in the side wall of the back pressure groove 12. Alternatively, the communication portion 13 may also be a through hole formed in the side wall of the back pressure groove 12, and of course, it is also possible to form both a notch and a through hole in the side wall of the back pressure groove 12 as necessary.

[0027] In some embodiments, as shown in FIGS. 2 and 3, the communication portion 13 is a notch formed in the sidewall of the backpressure groove 12.

[0028] In some embodiments, a plurality of communication parts 13 may be provided, and the plurality of communication parts 13 may be spaced apart and arranged around the axial hole 11. By using such a configuration, the position of the corresponding communication part may be set according to the moving state of the sliding vane, so that in the compression operation, the whole pump body assembly may ensure that the sliding vane is always in a stable compression state under the action of the back pressure groove, thus improving the reliability of the pump body assembly with flange. As shown in Figs. 2-5, the communication part 13 is a notch structure formed on the side wall with one notch.

[0029] As shown in FIG. 6 to FIG. 8, the communication part 13 includes a first notch 131, the back pressure groove 12 has a first position on the side wall adjacent to the axial hole 11, the first notch 131 is formed at the first position, an included angle α1 is formed by a connecting line between both ends of the first notch 131 and the center of the axial hole 11, and A-50°≦α1≦A+50°, A is the angle at which the sliding vane moves out of the sliding vane groove to a first initial position (i.e., the operating position of the sliding vane) until the speed of the sliding vane reaches its maximum. The maximum speed at which the sliding vane extends from the sliding vane groove can be obtained by mathematical calculation according to the size of the rotation shaft, the sliding vane, the cylinder, etc., as shown in Figure 11, which illustrates an embodiment in which the angle of rotation when the speed of the sliding vane extending along the sliding vane groove reaches its maximum is 105°. The moving speed of the sliding vane in Figure 11 includes the speed at which the sliding vane extends out of the sliding vane groove and the speed at which the sliding vane retracts into the sliding vane groove.

[0030] The communication portion 13 further includes a second notch 132, the second notch 132 is disposed at a distance from the first notch 131, the back pressure groove 12 has a second position on the side wall adjacent to the axial hole 11, the second notch 132 is formed at the second position, an included angle α2 is formed by a connecting line between both ends of the second notch 132 and the center of the axial hole 11, and B-50°≦α2≦B+50°, B is the angle at which the sliding vane moves toward the sliding vane groove from the second initial position (the sliding vane moves toward the sliding vane groove from the second initial position (the sliding vane moves toward the sliding vane groove from the first ... The sliding vane starts to extend outward, and after extending to a preset value, the sliding vane gradually retracts into the sliding vane groove, i.e., the second initial position is the position where the sliding vane starts to retract into the sliding vane groove), and similarly, the maximum speed at which the sliding vane retracts into the sliding vane groove can also be obtained by mathematical calculation according to the size of the rotating shaft, the sliding vane, the cylinder, etc. By using such a configuration, a stable and reliable oil pressure can be provided at the tail of the sliding vane at each position where the sliding vane extends, and a stable operation can be maintained even when the sliding vane extends out of the sliding vane groove at the maximum speed, and when the sliding vane retracts into the sliding vane groove at the other maximum speed.

[0031] In some embodiments, the communication portion 13 is configured in an arc shape around the axial hole 11, and an included angle θ is formed by a connecting line between both ends of the communication portion 13 and the center of the axial hole 11, and is A-50°≦θ≦B+50° or A-30°≦θ≦B+30°. As shown in Figures 2 and 4, the communication portion 13 is a notch structure, and an included angle θ is formed by a connecting line between both ends of the notch and the center of the axial hole 11, and is A-50°≦θ≦B+50° or A-30°≦θ≦B+30°. A is the angle of rotation of the sliding vane rotating with the main shaft of the pump body assembly until the sliding vane reaches its maximum speed when it begins to extend out of the sliding vane groove, and B is the angle of rotation of the sliding vane rotating with the main shaft of the pump body assembly until the sliding vane reaches its maximum speed when it begins to retract into the sliding vane groove.

[0032] 3, the communication portion 13 is a notch formed in the side wall of the back pressure groove 12, the height difference between the notch and the flange surface is H1, the depth of the back pressure groove 12 is H2, the thickness of the flange body 10 is H, the ratio of H2 to H is in the range of 0.1 to 0.6, the ratio of H1 to H2 is in the range of 0.1 to 1, and H1 ≧ 1 mm. Such a configuration ensures that oil is supplied to and discharged from the back pressure groove 12 in a timely manner, while reducing the resistance to the flow of lubricating oil at the notch.

[0033] In some embodiments, the flange may be used in a pump body equipment assembly, i.e., according to another aspect of some embodiments of the present disclosure, there is provided a pump body assembly including a flange, such as the flange in the above embodiment.

[0034] In some embodiments, the pump assembly includes a cylinder 20 and a main shaft 30. The flange body 10 is disposed on the cylinder 20. The main shaft 30 has a central portion 31, at least one sliding vane groove is formed in the central portion 31, a sliding vane 40 is provided in each of the at least one sliding vane groove, an axial hole 11 passes through the main shaft 30, the central portion 31 is disposed in the cylinder 20, and the main shaft 30 rotates and drives the sliding vane 40 to perform a compression action in the cylinder 20. A back pressure chamber is formed in the back pressure groove 12 of the flange body 10.

[0035] In some embodiments, as shown in Fig. 10, three sliding vane grooves are formed in the central portion 31, and a first sliding vane 41, a second sliding vane 42, and a third sliding vane 43 are provided in the three sliding vane grooves, respectively. The first initial position mentioned above is the position where the first sliding vane 41 is located in Fig. 10, at which point the first sliding vane 41 completes the compression operation and begins to extend from the sliding vane groove for the next cycle of compression operation. The second initial position is the position where the third sliding vane 43 extends to its farthest position and begins to retract towards the sliding vane groove.

[0036] As shown in FIG. 9, in the back pressure groove solution provided by the embodiment of the present disclosure, the pressure change range P2-P3 throughout the entire rotation cycle is smaller than P1-P4, indicating that the pressure change of the back pressure groove provided by the embodiment of the present disclosure is relatively smooth with small fluctuations. It can be seen that at the positions of the maximum extension speed and maximum retraction speed of the sliding vane, the pressure of the back pressure groove provided by the embodiment of the present disclosure is greater than that of the back pressure groove in the related art, and can better and steadily support the tail of the sliding vane.

[0037] In the description of the present disclosure, it should be recognized that the use of the terms "first", "second", "third", etc. to define parts or elements is merely for the convenience of distinguishing the above-mentioned parts or elements. Unless otherwise stated, the above terms do not have any special meaning and therefore cannot be interpreted as a limitation on the protection scope of the present disclosure.

[0038] In addition, technical features of one embodiment may be advantageously combined with one or more other embodiments, unless expressly stated otherwise.

[0039] Finally, it should be noted that the above examples are only used to illustrate, not to limit, the technical solutions of the present disclosure. Although the present disclosure is described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can make modifications to the specific embodiments in the present disclosure or make equivalent substitutions to some of its technical features. And such modifications and equivalent substitutions should be included within the scope of the technical solutions sought to be protected in the present disclosure, as long as they do not depart from the gist of the technical solutions of the present disclosure.

Claims

1. A pump body assembly comprising: A cylinder (20) in which the flange body (10) is disposed on the cylinder (20) side; a main shaft (30) having a central portion (31), at least one sliding vane groove formed in the central portion (31), a sliding vane (40) provided in each of the at least one sliding vane groove, the shaft hole (11) passing through the main shaft (30), the central portion (31) being disposed in the cylinder (20), the main shaft (30) configured to drive the sliding vane (40) in rotation to perform a compression operation in the cylinder (20); A flange; Including, The flange includes a flange body (10) having an axial hole (11), a back pressure groove (12) is provided in addition to the axial hole (11), a communication portion (13) is provided in a side wall of the back pressure groove (12) adjacent to the axial hole (11), the communication portion (13) communicates the back pressure groove (12) with the axial hole (11), and the communication portion (13) is configured to supply lubricating oil to the back pressure groove (12) or discharge lubricating oil from the back pressure groove (12), the communication portion (13) includes a first notch (131) disposed on the side wall of the back pressure groove (12) adjacent to the axial hole (11), an included angle α1 is formed by a connecting line between both ends of the first notch (131) and the center of the axial hole (11), A-50°≦α1≦A+50°, A is the angle of rotation of the sliding vane (40) when the sliding vane (40) starts to extend from a first initial position out of the sliding vane groove until the speed of the sliding vane (40) reaches its maximum, a first notch (131) configured to correspond to a position of the sliding vane (40) at all times from when the sliding vane groove begins to extend to when the sliding vane reaches its maximum speed.

2. 2. The pump body assembly of claim 1, wherein the communication portion (13) includes at least one notch and a through hole, the notch being provided in the side wall of the back pressure groove (12) and the through hole being provided in the side wall of the back pressure groove (12).

3. 3. The pump body assembly according to claim 1 or 2, wherein there are a plurality of communication portions (13), the plurality of communication portions (13) being spaced apart and arranged around the axial hole (11).

4. 2. The pump body assembly of claim 1, wherein the communication portion further comprises a second notch disposed on the side wall of the back pressure groove adjacent to the axial hole, and an included angle α2 is formed by a connecting line between both ends of the second notch and a center of the axial hole, and B-50°≦α2≦B+50°, where B is an angle of rotation of the sliding vane when it starts to retract from a second initial position towards the sliding vane groove until the speed of the sliding vane reaches its maximum.

5. 4. The pump body assembly according to claim 1, wherein the communication portion (13) is configured in a circular arc shape, and an included angle θ is formed by a connecting line between both ends of the communication portion (13) and the center of the shaft hole (11), and is A-50°≦θ≦B+50° or A-30°≦θ≦B+30°, where A is the angle of rotation until the speed of the sliding vane reaches its maximum when the sliding vane starts to extend out of the sliding vane groove, and B is the angle of rotation until the speed of the sliding vane reaches its maximum when the sliding vane starts to retract towards the sliding vane groove.

6. 6. The pump body assembly according to claim 1, wherein the communication portion (13) is a notch formed in the side wall of the back pressure groove (12), a height difference between the notch and a flange surface is H1, a depth of the back pressure groove (12) is H2, a thickness of the flange body (10) is H, a ratio of H2 to H is in the range of 0.1 to 0.6, and a ratio of H1 to H2 is in the range of 0.1 to 1.

7. The pump body assembly according to claim 6, wherein H1≧1 mm.

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