Single-action vane type vacuum pump stator and rotor radial clearance adjusting mechanism

Abstract

The utility model relates to the technical field of vacuum pumps, in particular to a single-action vane type vacuum pump stator and rotor radial clearance adjusting mechanism which comprises a first supporting mother board, supporting rods are connected to the two sides of the top of the first supporting mother board, the supporting rods are connected with a second supporting mother board, and the inner wall of the second supporting mother board is connected with a vacuum pump. The top of the second supporting mother plate is connected with a special assembly tool, a stator is arranged on the inner wall of the special assembly tool and connected with the vacuum pump, and the inner wall of the stator is connected with a rotor. When the movable bolt is screwed by a wrench, the outer wall of the stator is in contact with the measuring head of the dial indicator, so that the value of radial deviation can be conveniently checked, adjustment is facilitated, the gap between the stator and the rotor can meet the air exhaust performance requirement and the noise requirement, the unqualified rate of assembly is reduced, the assembly efficiency is improved, and repeated adjustment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a radial clearance adjustment mechanism for a stator and rotor of a single-acting vane vacuum pump. Background Art

[0002] At present, the working principle of the single-acting vane vacuum pump for automobiles is that the motor shaft drives the transmission sleeve to rotate at high speed and transmits the rotation speed to the rotor. When the rotor rotates, the blades are thrown out and combined with the stator, stator seat, and stator cover to form a working chamber for suction and exhaust circulation, thereby achieving the vacuum pumping function. The gap control method between the stator and the rotor of the vane vacuum pump is relatively simple, and is basically assembled manually. If the rotor is radially offset during assembly, the vacuum pump pumping speed will decrease, or the noise will be high, reducing the product qualification rate. In addition, the bolts and gaskets of unqualified products need to be removed, wasting work time.

[0003] Prior art, such as publication number CN213176012U, provides a single-acting vane vacuum pump stator-rotor gap control mechanism, including a base, a vane pump assembly and a pressing mechanism, wherein the base is configured to fix the vane pump assembly, the vane pump assembly includes a stator, a rotor and a stator cover, the stator has a circular inner cavity, the rotor is eccentrically arranged in the inner cavity and there is a radial gap between the stator and the stator; the pressing mechanism is configured to press the stator cover that is not installed with bolts onto the stator during operation and apply corresponding pressure to the stator cover under different conditions to adjust the gap, after the gap adjustment is completed, the stator cover is installed on the stator by screws; compared with the prior art, when the mechanism is used to adjust the stator-rotor gap, when the tested product is unqualified, there is no need to remove the bolts and gaskets, which saves work time and improves efficiency.

[0004] In this scheme, during the test phase, a downward pressure mechanism is used to press the stator cover with greater pressure. At this time, the stress state of the stator, stator cover and other components is equivalent to the state of the stator cover being tightened on the stator by bolts for testing. However, the performance test is directly connected to the air pipe of the external performance test bench through the vane pump assembly. If it fails, it is impossible to confirm the value of the radial offset of the rotor during assembly. There is no exact value for subsequent adjustments, and multiple adjustments are required. This process is more troublesome and affects the efficiency of assembly. In view of this, we propose a single-acting vane vacuum pump stator and rotor radial clearance adjustment mechanism. Utility Model Content

[0005] The utility model aims to provide a single-acting vane type vacuum pump stator and rotor radial clearance adjustment mechanism, which solves the problem that multiple adjustments and tests are required during assembly of the vacuum pump.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism comprises a first support motherboard, support rods are connected to both sides of the top of the first support motherboard, the support rods are connected to the second support motherboard, the inner wall of the second support motherboard is connected to a vacuum pump, the top of the second support motherboard is connected to a special assembly tool, the inner wall of the special assembly tool is provided with a stator, and the stator is connected to the vacuum pump, and the inner wall of the stator is connected to the rotor;

[0008] The inner wall connector on the left side of the special assembly tool is equipped with a micrometer. A through hole is provided on the right side of the special assembly tool. A movable bolt is threadedly connected to the inner wall of the through hole. The movable bolt is tightened with a wrench. At this time, the outer wall of the stator will contact the micrometer probe to facilitate viewing the value of the radial offset, so as to facilitate adjustment, so that the gap between the stator and the rotor can meet both the exhaust performance requirements and the noise requirements, so as to reduce the unqualified rate of assembly, improve the assembly efficiency, and avoid multiple adjustments.

[0009] Preferably, the stator has a circular inner cavity, and the rotor is eccentrically arranged in the inner cavity and has a radial gap with the stator.

[0010] Preferably, a stator cover is provided on the top of the stator, and fixing bolts are provided on the top of the stator cover for installing and fixing the stator.

[0011] Preferably, the number of the fixing bolts is three and they are evenly distributed at 120 degrees. A snap-in groove is provided at the position where the stator cover is connected to the stator. The triangular arrangement of the fixing bolts has higher stability. The snap-in groove is provided to facilitate the assembly of the stator cover and the stator.

[0012] Preferably, the top of the first supporting motherboard is connected to a supporting seat, the top of the supporting seat is rotatably connected to an electric telescopic rod, and the output end of the electric telescopic rod is connected to a clamping block via a connecting rod, so that the stator can be fixed by driving the clamping block to press the special assembly tooling through the extension and retraction of the electric telescopic rod. At this time, the stress state of various components such as the stator and stator cover is equivalent to the state of the stator cover being tightened to the stator by the fixing bolts for testing.

[0013] Preferably, a stepping motor for driving the electric telescopic rod to rotate is connected to the inner wall of the support seat.

[0014] Preferably, an operating button is connected to the top front position of the first supporting motherboard, which is used to control the operation of the electric telescopic rod and the stepper motor. By pressing the tightening button in the operating button, the stepper motor drives the clamping block at the output end of the electric telescopic rod to move above the special assembly tooling, and drives the clamping block to be pressed down through the electric telescopic rod.

[0015] By means of the above technical solution, the utility model provides a single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism, which has at least the following beneficial effects:

[0016] 1. The utility model uses a wrench to tighten the movable bolt. At this time, the outer wall of the stator will contact the dial gauge probe, so that the value of the radial offset can be checked for easy adjustment, so that the gap between the stator and the rotor can meet both the pumping performance requirements and the noise requirements, so as to reduce the unqualified rate of assembly, improve the assembly efficiency, and avoid multiple adjustments.

[0017] Second, the utility model fixes the stator by means of a pressing block pressed against a special assembly tool by the extension and retraction of an electric telescopic rod. At this time, the stress state of the stator, stator cover and other components is equivalent to the state in which the stator cover is tightened on the stator by fixing bolts for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0019] Figure 1 It is a partial cross-sectional view of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 This is a diagram showing the connection relationship of the components on the top of the second supporting motherboard in the utility model;

[0022] Figure 4 It is a partial cross-sectional view of the special tooling for assembling the utility model.

[0023] In the figure: 1. first supporting motherboard; 2. supporting rod; 3. second supporting motherboard; 4. vacuum pump; 5. special assembly tool; 51. micrometer; 52. through hole; 53. movable bolt; 54. rotor; 55. stator; 56. stator cover; 561. fixing bolt; 6. supporting seat; 61. electric telescopic rod; 62. clamping block; 63. operation button. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] Single-acting vane vacuum pump stator and rotor radial clearance adjustment mechanism, such as Figure 1 - Figure 4 As shown, it includes a first supporting motherboard 1, support rods 2 are connected to both sides of the top of the first supporting motherboard 1, the support rods 2 are connected to the second supporting motherboard 3, the inner wall of the second supporting motherboard 3 is connected to the vacuum pump 4, the top of the second supporting motherboard 3 is connected to a special assembly tool 5, the inner wall of the special assembly tool 5 is provided with a stator 55, and the stator 55 is connected to the vacuum pump 4, and the inner wall of the stator 55 is connected to the rotor 54; the inner wall of the left side of the special assembly tool 5 is connected to the micrometer 51, and the right side of the special assembly tool 5 is provided with a through hole 52, and the inner wall of the through hole 52 is threadedly connected with a movable bolt 53. The movable bolt 53 is tightened with a wrench, and the outer wall of the stator 55 will contact the probe of the micrometer 51 at this time, so as to facilitate the viewing of the value of the radial offset, so as to facilitate the operation. Adjustment is performed so that the gap between the stator 55 and the rotor 54 can meet both the air extraction performance requirements and the noise requirements, so as to reduce the unqualified rate of assembly, improve the assembly efficiency, and avoid multiple adjustments. The stator 55 has a circular inner cavity, and the rotor 54 is eccentrically arranged in the inner cavity and has a radial gap with the stator 55. A stator cover 56 is arranged on the top of the stator 55, and a fixing bolt 561 is arranged on the top of the stator cover 56 for installing and fixing the stator 55. There are three fixing bolts 561, which are evenly distributed at one hundred and twenty degrees. A snap-in groove is arranged at the position where the stator cover 56 is connected to the stator 55. The triangular arrangement of the fixing bolts 561 has high stability. The snap-in groove is arranged to facilitate the assembly of the stator cover 56 and the stator 55.

[0027] In this embodiment, the movable bolt 53 is tightened two full turns clockwise with a wrench, at which time the outer wall of the stator 55 will contact the probe of the micrometer 51, and then the wrench is rotated counterclockwise to loosen the micrometer 51, and the micrometer 51 will display a value X. Then, the movable bolt 53 is rotated clockwise with the wrench so that the pointer of the micrometer 51 reads X+Y, where Y is a fixed value obtained after statistics of multiple actual assembly data, so that the gap between the stator 55 and the rotor 54 can meet both the exhaust performance requirements and the noise requirements.

[0028] Example 2

[0029] like Figure 1 , Figure 2As shown, a support seat 6 is connected to the top of the first supporting motherboard 1, and an electric telescopic rod 61 is rotatably connected to the top of the supporting motherboard 6. A clamping block 62 is connected to the output end of the electric telescopic rod 61 through a connecting rod, so that the stator 55 is fixed by driving the clamping block 62 to press the special assembly tooling 5 through the extension and contraction of the electric telescopic rod 61. At this time, the stress state of each component such as the stator 55 and the stator cover 56 is equivalent to the state in which the fixing bolt 561 tightens the stator cover 56 on the stator 55 for testing. A stepper motor for driving the electric telescopic rod 61 to rotate is connected to the inner wall of the supporting seat 6. The stepper motor is used to drive the electric telescopic rod 61 to rotate. An operating button 63 is connected to the front position of the top of the first supporting motherboard 1 for controlling the operation of the electric telescopic rod 61 and the stepper motor. By pressing the tightening button in the operating button 63, the stepper motor drives the clamping block 62 at the output end of the electric telescopic rod 61 to move to the top of the special assembly tooling 5, and drives the clamping block 62 to press down through the electric telescopic rod 61.

[0030] In this embodiment, by pressing the tightening button in the operating button 63, the stepping motor drives the clamping block 62 at the output end of the electric telescopic rod 61 to move to the top of the special assembly tooling 5, and the electric telescopic rod 61 drives the clamping block 62 to press down, and the stator 55 is fixed by pressing the clamping block 62 to press the special assembly tooling 5. At this time, the stress state of each component such as the stator 55 and the stator cover 56 is equivalent to the state where the fixing bolt 561 tightens the stator cover 56 to the stator 55 for testing.

[0031] When the single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism of the utility model is used, the vacuum pump 4 is placed on the second supporting motherboard 3, and the stator 55 fixing bolts 561 are manually pre-tightened. After the fixing bolts 561 are pre-tightened, the tightening button in the operation button 63 is pressed, so that the stepping motor drives the clamping block 62 at the output end of the electric telescopic rod 61 to move to the top of the special assembly tool 5, and the clamping block 62 is driven downward by the electric telescopic rod 61, and the special assembly tool 5 is pressed by the clamping block 62 to fix the stator 55. At this time, the stress state of each component such as the stator 55 and the stator cover 56 is equivalent to the stator cover 56 being tightened with the fixing bolts 561. The state on the stator 55 is tested, and the movable bolt 53 is tightened clockwise for two full turns with a wrench. At this time, the outer wall of the stator 55 will contact the probe of the micrometer 51. Then, the wrench is rotated counterclockwise to loosen the micrometer 51. The micrometer 51 will display a value X. Then, the movable bolt 53 is rotated clockwise with a wrench to make the pointer reading of the micrometer 51 X+Y, where Y is a fixed value obtained after statistics of multiple actual assembly data, so that the gap between the stator 55 and the rotor 54 can meet both the pumping performance requirements and the noise requirements. When the pointer of the micrometer 51 turns to the specified value, tighten the fixing bolt 561 according to the torque requirement, and finally press the release button to release the clamping block 62, and the assembly is completed.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism, comprising a first supporting motherboard (1), characterized in that: The first support motherboard (1) is connected to support rods (2) on both sides of the top, the support rods (2) are connected to the second support motherboard (3), the inner wall of the second support motherboard (3) is connected to a vacuum pump (4), the top of the second support motherboard (3) is connected to a special assembly tool (5), the inner wall of the special assembly tool (5) is provided with a stator (55), and the stator (55) is connected to the vacuum pump (4), and the inner wall of the stator (55) is connected to a rotor (54); The inner wall of the left side of the special assembly tool (5) is connected to a micrometer (51), and the right side of the special assembly tool (5) is provided with a through hole (52), and the inner wall of the through hole (52) is threadedly connected to a movable bolt (53).

2. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 1, characterized in that: The stator (55) has a circular inner cavity, and the rotor (54) is eccentrically arranged in the inner cavity and has a radial gap with the stator (55).

3. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 1, characterized in that: A stator cover (56) is provided on the top of the stator (55), and a fixing bolt (561) is provided on the top of the stator cover (56).

4. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 3, characterized in that: The number of the fixing bolts (561) is three and they are evenly distributed at an angle of 120 degrees. A clamping groove is provided at the position where the stator cover (56) is connected to the stator (55).

5. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 1, characterized in that: The top of the first supporting motherboard (1) is connected to a supporting seat (6), the top of the supporting seat (6) is rotatably connected to an electric telescopic rod (61), and the output end of the electric telescopic rod (61) is connected to a pressing block (62) via a connecting rod.

6. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 5, characterized in that: The inner wall of the support seat (6) is connected to a stepping motor for driving the electric telescopic rod (61) to rotate.

7. The single-acting vane vacuum pump stator-rotor radial clearance adjustment mechanism according to claim 6, characterized in that: An operating button (63) is connected to the front of the top of the first supporting motherboard (1) for controlling the operation of the electric telescopic rod (61) and the stepping motor.

Images