Volume flow adjusting device and oil injection screw type air compressor comprising same

Abstract

The utility model discloses a volume flow adjusting device and an oil injection screw type air compressor comprising the volume flow adjusting device, the volume flow adjusting device comprises a male rotor, a female rotor, an outer shell and an adjusting check block, the male rotor and the female rotor are both rotatably connected in the outer shell, and the adjusting check block is arranged in the outer shell. The male rotor and the female rotor are arranged in the outer shell, the male rotor and the female rotor are meshed with each other and form an inter-tooth volume, and the adjusting check block is detachably connected to the inner wall face of the outer shell, located between the outer shell and the inter-tooth volume and used for sealing the inter-tooth volume. The adjusting check block is detachably connected to the inner wall face of the outer shell, the inter-tooth volume is sealed, the output volume flow is adjusted by changing the inter-tooth volume, and the purpose that operation does not exceed the motor power is achieved. The system is simple in structure and convenient to implement, can meet the use requirements of users in different altitude areas, greatly shortens the time for redesign and model selection, improves the use range and universality, and reduces the cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of volumetric flow regulating device and the oil-injected screw air compressor comprising it. BACKGROUND

[0002] The oil-injected screw air compressor is a kind of rotary volumetric compressor, and the rated working condition of the oil-injected screw air compressor is usually designed according to 8 bar.g. When the oil-injected screw air compressor operates at rated speed and exhaust pressure of 8 bar.g, the oil-injected screw air compressor consumes constant shaft power to compress constant volumetric flow. Due to the difference in atmospheric pressure in different altitudes, when the oil-injected screw air compressor is used in areas below sea level, the atmospheric pressure is higher than the standard atmospheric pressure at this time, and the oil-injected screw air compressor needs to consume more shaft power, which may cause the oil-injected screw air compressor to operate beyond the motor power at this time, and further cause the oil-injected screw air compressor to be unable to operate at rated working condition, causing certain economic loss to the user. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned deficiencies existing in the prior art, and provides a volumetric flow regulating device and an oil-injected screw air compressor comprising the same.

[0004] The utility model is realized by the following technical solutions:

[0005] A volumetric flow regulating device comprises a male rotor, a female rotor, an outer shell and an adjusting block. The male rotor and the female rotor are rotatably connected in the outer shell, and the male rotor and the female rotor are intermeshed and form an interdental volume. The adjusting block is detachably connected to the inner wall surface of the outer shell, and the adjusting block is located between the outer shell and the interdental volume and is used to seal the interdental volume.

[0006] Further, the male rotor comprises a first spiral segment and two first shaft segments, the two first shaft segments are respectively connected to the two ends of the first spiral segment and are rotatably connected in the outer shell, the female rotor comprises a second spiral segment and two second shaft segments, the two second shaft segments are respectively connected to the two ends of the second spiral segment and are rotatably connected in the outer shell, the first spiral segment and the second spiral segment are intermeshed, and the adjusting block seals the interdental volume between the first spiral segment and the second spiral segment.

[0007] Further, the two ends of the adjusting block are respectively provided with limiting clamping grooves, and the two limiting clamping grooves are respectively sleeved and abut against the first shaft segment and the second shaft segment.

[0008] Further, the shape of the adjusting block is a "human" shape.

[0009] Further, the first rotating shaft section is connected to the outer shell through a first bearing, and the second rotating shaft section is connected to the outer shell through a second bearing.

[0010] Further, the adjusting block has a plurality of connecting holes, and the connecting holes are connected to the outer shell through bolts.

[0011] Further, the outer shell comprises a machine body and a bearing seat, the adjusting block is detachably connected to one end of the machine body, the bearing seat is connected to the other end of the machine body, and the two ends of the male rotor and the female rotor are rotatably connected to the machine body and the bearing seat respectively.

[0012] Further, the first spiral section and the second spiral section are located between the bearing seat and the adjusting block.

[0013] An oil-injected screw air compressor comprises the volumetric flow regulating device.

[0014] The volumetric flow regulating device has the advantages that:

[0015] The volumetric flow regulating device and the oil-injected screw air compressor comprising the same have the advantages that the adjusting block is detachably connected to the inner wall surface of the outer shell and seals the intertooth volume, the intertooth volume between the male rotor and the female rotor is changed to regulate the volumetric flow output by the oil-injected screw air compressor, the purpose of not exceeding the motor power during the operation of the oil-injected screw air compressor is achieved, the design is convenient to realize, the use requirements of users in different altitudes can be met by slightly modifying the original oil-injected screw air compressor, the time for re-designing and selecting is greatly shortened, the use range and commonality of the oil-injected screw air compressor product are improved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic view of the internal structure of the volumetric flow regulating device according to the present application.

[0017] Figure 2 FIG. 4 is a schematic view of the structure of the male rotor, the female rotor and the adjusting block according to the present application.

[0018] Figure 3 FIG. 5 is a schematic view of the structure of the adjusting block according to the present application.

[0019] REFERENCE SIGNS:

[0020] Male rotor 1

[0021] First helical section 11

[0022] First rotating shaft section 12

[0023] First interdental volume 13

[0024] First bearing 14

[0025] Female rotor 2

[0026] Second helical section 21

[0027] Second rotating shaft section 22

[0028] Second interdental volume 23

[0029] Second bearing 24

[0030] Outer housing 3

[0031] Machine body 31

[0032] Bearing seat 32

[0033] Adjusting block 4

[0034] Limiting clamping groove 41

[0035] Connecting hole 42 DETAILED DESCRIPTION

[0036] The following description of the embodiments is made with reference to the drawings, which are intended to illustrate specific embodiments in which the present application can be implemented.

[0037] The present embodiment discloses an oil-injected screw air compressor, which comprises a volumetric flow adjusting device. As shown in Figs. Figure 1 、 Figure 2 and Figure 3 , the volumetric flow adjusting device comprises a male rotor 1, a female rotor 2, an outer housing 3, and an adjusting block 4, the male rotor 1 and the female rotor 2 are rotatably connected in the outer housing 3, and the male rotor 1 and the female rotor 2 are in meshing engagement and form an interdental volume, the adjusting block 4 is detachably connected to the inner wall surface of the outer housing 3, and the adjusting block 4 is located between the outer housing 3 and the interdental volume and is used for sealing the interdental volume. By detachably connecting the adjusting block 4 to the inner wall surface of the outer housing 3 and sealing the interdental volume, the volumetric flow output by the oil-injected screw air compressor is adjusted by changing the interdental volume between the male rotor 1 and the female rotor 2, so that the oil-injected screw air compressor does not exceed the motor power during operation. The advantage of the design is that it is easy to implement, only slight changes are needed on the basis of the original oil-injected screw air compressor, which can meet the use requirements of users in different altitudes, greatly shortens the time of re-design and selection, and improves the use range and commonality of the oil-injected screw air compressor product, and reduces the cost.

[0038] In the embodiment, the outer housing 3 comprises a body 31 and a bearing seat 32, the adjusting block 4 is detachably connected to one end of the body 31, the bearing seat 32 is connected to the other end of the body 31, and the two ends of the male rotor 1 and the female rotor 2 are rotatably connected to the body 31 and the bearing seat 32 respectively. The adjusting block 4 is detachably connected to the body 31, and the adjusting block 4, the body 31 and the bearing seat 32 jointly form an outer shell sealing the interdental volume of the male rotor 1 and the female rotor 2.

[0039] The male rotor 1 comprises a first helical segment 11 and two first shaft segments 12, the two first shaft segments 12 are respectively connected to the two ends of the first helical segment 11 and are rotatably connected to the outer housing 3, the female rotor 2 comprises a second helical segment 21 and two second shaft segments 22, the two second shaft segments 22 are respectively connected to the two ends of the second helical segment 21 and are rotatably connected to the outer housing 3, the first helical segment 11 and the second helical segment 21 are in meshing relationship, and the adjusting block 4 seals the interdental volume between the first helical segment 11 and the second helical segment 21. The volume flow of the oil-injected screw air compressor is controlled by the first interdental volume 13 of the male rotor 1 and the second interdental volume 23 of the female rotor 2 in meshing relationship, the first helical segment 11 of the male rotor 1 forms the first interdental volume 13, the second helical segment 21 of the female rotor 2 forms the second interdental volume 23, the interdental volume between the male rotor 1 and the female rotor 2 can be effectively reduced by cutting the first helical segment 11 of the male rotor 1 and the second helical segment 21 of the female rotor 2, and the interdental volume is sealed by the adjusting block 4 through disassembly, replacement and installation of the adjusting block 4, so as to reduce the volume flow and shaft power of the oil-injected screw air compressor under the same operating condition.

[0040] The first shaft segment 12 is connected to the outer housing 3 through the first bearing 14, and the second shaft segment 22 is connected to the outer housing 3 through the second bearing 24. The first helical segment 11 and the second helical segment 21 are located between the bearing seat 32 and the adjusting block 4. Cutting the helical segments of the male rotor and the female rotor can effectively reduce the interdental volume of the male rotor and the female rotor, the volume flow of the air compressor can be adjusted by changing the interdental volume of the male rotor and the female rotor, and the purpose of not exceeding the motor power during operation of the air compressor is achieved. The advantage of the design is that it is easy to realize, only slight modification is needed on the basis of the original air compressor, which can meet the use requirements of users in different altitudes, greatly shortens the time of re-design and selection, improves the use range and commonality of the air compressor product, and reduces the cost.

[0041] In the embodiment, the two ends of the adjusting block 4 are respectively provided with limiting clamping grooves 41, and the two limiting clamping grooves 41 are respectively sleeved and abut against the first shaft segment 12 and the second shaft segment 22. The cooperation of the adjusting block 4 with the male rotor 1 and the female rotor 2 is effectively strengthened through the two limiting clamping grooves 41, and the adjusting block 4, the body 31 and the bearing seat 32 jointly form a seal for the interdental volume of the male rotor 1 and the female rotor 2.

[0042] Specifically, the shape of the adjusting block 4 is in the shape of a "human" figure, which is simple in structure, easy to manufacture and low in cost. The adjusting block 4 not only includes the shape of a "human" figure, but also can include various shapes that can form a sealed volume between the male rotor 1 and the female rotor 2.

[0043] The adjusting block 4 has a plurality of connecting holes 42, which are respectively connected to the outer shell 3 through a plurality of bolts. The plurality of connecting holes 42 of the adjusting block 4 are detachably connected to the machine body 31 through a plurality of bolts, which is very convenient to install and disassemble. Specifically, the number of the connecting holes 42 is three.

[0044] The above only discloses the preferred embodiment of the utility model, of course, cannot limit the scope of the utility model right with this, therefore, the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.

Claims

1. A volumetric flow regulating device, characterized by, The device comprises a male rotor, a female rotor, an outer casing and an adjusting block, the male rotor and the female rotor are rotatably connected in the outer casing, the male rotor and the female rotor are engaged with each other and form an interdental volume, the adjusting block is detachably connected to the inner wall of the outer casing, and the adjusting block is located between the outer casing and the interdental volume and is used for sealing the interdental volume.

2. The volumetric flow regulation device of claim 1, wherein, The male rotor comprises a first spiral segment and two first shaft segments, the two first shaft segments are respectively connected to the two ends of the first spiral segment and are rotatably connected in the outer casing, the female rotor comprises a second spiral segment and two second shaft segments, the two second shaft segments are respectively connected to the two ends of the second spiral segment and are rotatably connected in the outer casing, the first spiral segment and the second spiral segment are engaged with each other, and the adjusting block seals the interdental volume between the first spiral segment and the second spiral segment.

3. The volumetric flow regulation device of claim 2, wherein, The two ends of the adjusting block are respectively provided with limiting clamping grooves, and the two limiting clamping grooves are respectively sleeved and abutted on the first shaft segment and the second shaft segment.

4. The volumetric flow regulation device of claim 3, wherein, The adjusting block is in the shape of a "person”.

5. The volumetric flow regulation device of claim 2, wherein, The first shaft segment is connected in the outer casing through a first bearing, and the second shaft segment is connected in the outer casing through a second bearing.

6. The volumetric flow regulation device of claim 1, wherein, The adjusting block is provided with a plurality of connecting holes, and the plurality of connecting holes are respectively connected in the outer casing through a plurality of bolts.

7. The volumetric flow regulation device of claim 2, wherein, The outer casing comprises a machine body and a bearing seat, the adjusting block is detachably connected to one end in the machine body, the bearing seat is connected to the other end of the machine body, and the two ends of the male rotor and the female rotor are rotatably connected to the machine body and the bearing seat.

8. The volumetric flow regulation device of claim 7, wherein, The first spiral segment and the second spiral segment are located between the bearing seat and the adjusting block.

9. An oil-injected screw air compressor characterized by, The device comprises the volume flow adjusting device according to any one of claims 1-8.

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