CN219119452U

CN219119452U - Bipolar screw compressor

Info

Publication number: CN219119452U
Application number: CN202223317458.9U
Authority: CN
Inventors: 周坤; 马升; 庄博; 康翔朝
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-06-02
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a bipolar screw compressor, which comprises a casing and a driving device, wherein a high-pressure cavity and a low-pressure cavity are arranged in the casing, a high-pressure rotor set is arranged in the high-pressure cavity, and a low-pressure rotor set is arranged in the low-pressure cavity; the high-pressure rotor set is in transmission connection with the low-pressure rotor set through a transmission assembly, and the driving device is connected with the low-pressure rotor set; the method is characterized in that: the high-pressure chamber and the low-pressure chamber are provided with a gas transmission channel therebetween, one end of the high-pressure chamber is provided with a radial exhaust port, the radial exhaust port is provided with an internal volume ratio adjusting slide valve, and the internal volume ratio adjusting slide valve can adjust the size of the radial exhaust port. The bipolar screw compressor solves the problems of over-compression and under-compression, and can achieve the effects of improving the performance of a host, noise vibration and the like.

Description

Bipolar screw compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a bipolar screw compressor.

Background

In a single-pole compressor, a capacity adjustment mechanism is employed. That is, under some conditions, the unit is required to run under a smaller load condition, and the compressor slide block is controlled to move so as to change the capacity to meet the requirement.

However, in a dual stage compressor, the capacity is generally changed by only performing variable frequency adjustment of the compressor. The internal volume ratio of the two-stage compressor cannot be effectively regulated, which results in the situation of over-compression and under-compression in the compressor when the compression end pressure and the discharge pressure are not equal, and the two situations can cause additional energy loss and strong periodic discharge noise.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a bipolar screw compressor which solves the problems of over-compression and under-compression, and can achieve the effects of improving the performance of a host machine, improving noise vibration and the like.

The technical scheme of the utility model is that the bipolar screw compressor comprises a casing and a driving device, wherein a high-pressure cavity and a low-pressure cavity are arranged in the casing, a high-pressure rotor set is arranged in the high-pressure cavity, and a low-pressure rotor set is arranged in the low-pressure cavity; the high-pressure rotor set is in transmission connection with the low-pressure rotor set through a transmission assembly, and the driving device is connected with the low-pressure rotor set; the high-pressure chamber and the low-pressure chamber are provided with a gas transmission channel therebetween, one end of the high-pressure chamber is provided with a radial exhaust port, the radial exhaust port is provided with an internal volume ratio adjusting slide valve, and the internal volume ratio adjusting slide valve can adjust the size of the radial exhaust port.

After adopting above structure, the bipolar screw compressor of the utility model has the following advantages compared with the prior art:

because one end of the high-pressure cavity of the bipolar screw compressor is provided with the radial exhaust port, the radial exhaust port is provided with the internal volume ratio regulating slide valve, and the internal volume ratio regulating slide valve can regulate the size of the radial exhaust port. The radial exhaust size of the radial exhaust port of the high-pressure cavity can be changed by adjusting the internal volume ratio and the slide valve, so that the final pressure is matched with the exhaust pressure, and the effects of reducing energy consumption, noise and the like are achieved.

As an improvement, the internal volume ratio regulating slide valve comprises a valve rod and a valve core; the side wall of the high-pressure cavity is provided with a mounting cavity, the valve rod is in sliding fit in the mounting cavity, the valve rod is connected with a driver, and the driver drives the valve rod to slide back and forth in the mounting cavity; the valve core is connected to one end of the valve rod, and the valve core can open or close the radial exhaust port under the driving of the valve rod. After the structure is adopted, the internal volume ratio regulating slide valve has simple structure and is convenient to assemble and control.

As an improvement, a slide way is arranged on the side wall of the shell and positioned at the outer side of the radial exhaust port, and the valve core is in sliding fit in the slide way; the valve core is close to the end face of the valve rod and can block the outer side of the radial exhaust port, and a return spring is arranged between the end face of the valve core, which is far away from the valve rod, and the slideway. After the structure is adopted, the valve core slides along the slideway, and the operation is more stable.

As an improvement, the transmission assembly comprises a high-pressure gear and a low-pressure gear, wherein the high-pressure gear is arranged on the rotating shaft of the male rotor of the high-pressure rotor set, and the low-pressure gear is arranged on the rotating shaft of the male rotor of the low-pressure rotor set; the high-pressure gear is meshed with the low-pressure gear. After adopting this kind of structure, simple structure, the transmission effect is better.

As an improvement, one end of the shell is provided with an end cover, a gear accommodating cavity is formed between the end cover and the end part of the shell, and the gear accommodating cavity is communicated with the high-pressure cavity and the low-pressure cavity; the high-pressure gear and the low-pressure gear are both arranged in the gear accommodating cavity. After adopting this kind of structure, simple structure, equipment is convenient.

As an improvement, the low pressure chamber is located directly above the high pressure chamber, and the high pressure rotor set is located directly above the low pressure rotor set.

As an improvement, the outer diameter of the male rotor of the low-pressure rotor set is larger than that of the male rotor of the high-pressure rotor set; the length-diameter ratio of the rotor of the low-pressure rotor set is larger than that of the rotor of the high-pressure rotor set.

Drawings

FIG. 1 is a schematic cross-sectional view of a dual stage screw compressor of the present utility model.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

The figure shows: 1. the device comprises a shell, 101, a high-pressure cavity, 102, a low-pressure cavity, 103, a gas transmission channel, 104, radial exhaust ports, 105, an installation cavity, 106, a slideway, 2, a high-pressure rotor set, 3, a low-pressure rotor set, 4, an end cover, 5, a gear accommodating cavity, 6, a high-pressure gear, 7, a low-pressure gear, 8 and an internal volume ratio adjusting slide valve, 801, a valve rod, 802, a valve core, 9 and a return spring.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size and shape of the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "including," "containing," "includes" and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As shown in fig. 1 to 2, the present application discloses a two-stage screw compressor, which comprises a casing 1 and a driving device. The casing 1 is internally provided with a high-pressure cavity 101 and a low-pressure cavity 102, and the low-pressure cavity 102 is positioned right above the high-pressure cavity 101. The high-pressure cavity 101 is communicated with the low-pressure cavity 102 through a gas transmission channel 103.

The high-pressure cavity 101 is internally provided with a high-pressure rotor set 2, the high-pressure rotor set 2 comprises a high-pressure male rotor and a high-pressure female rotor, and the high-pressure male rotor is meshed with the high-pressure female rotor. The low-pressure cavity 102 is internally provided with a low-pressure rotor set 3, the low-pressure rotor set 3 comprises a low-pressure male rotor and a low-pressure female rotor, and the low-pressure male rotor is meshed with the low-pressure female rotor. The low-pressure rotor set 3 is located right above the high-pressure rotor set 2. The outer diameter of the low-pressure male rotor of the low-pressure rotor set 3 is larger than that of the high-pressure male rotor of the high-pressure rotor set 2; the rotor length-diameter ratio of the low-pressure rotor set 3 is larger than that of the high-pressure rotor set 2.

One end of the casing 1 is fixedly connected with an end cover 4, a gear accommodating cavity 5 is formed between the end cover 4 and the end part of the casing 1, and the gear accommodating cavity 5 is communicated with the high-pressure cavity 101 and the low-pressure cavity 102. The high-pressure rotor set 2 is in transmission connection with the low-pressure rotor set 3 through a transmission assembly, and the transmission assembly comprises a high-pressure gear 6 and a low-pressure gear 7. The high-pressure gear 6 is arranged on the rotating shaft of the male rotor of the high-pressure rotor set 2, the low-pressure gear 7 is arranged on the rotating shaft of the male rotor of the low-pressure rotor set 3, and the high-pressure gear 6 is meshed with the low-pressure gear 7.

One end of the high-pressure cavity 101 is provided with a radial exhaust port 104, the radial exhaust port 104 is provided with an internal volume ratio regulating slide valve 8, and the internal volume ratio regulating slide valve 8 can regulate the size of the radial exhaust port 104. The internal volume ratio regulating spool valve 8 includes a valve stem 801 and a spool 802. The side wall of the high-pressure cavity 101 is provided with an installation cavity 105, the valve rod 801 is in sliding fit in the installation cavity 105, the valve rod 801 is connected with a driver, the driver is a hydraulic device, the valve rod 801 is provided with a hydraulic oil way, the hydraulic oil way is connected with the hydraulic device through an oil pipe, and the hydraulic device drives the valve rod 801 to slide back and forth. The driver may be an air cylinder or a linear motor, the driving end of the driver is connected with the end of the valve rod 801, and the driver drives the valve rod 801 to move back and forth.

The valve core 802 is connected to one end of the valve rod 801, and the valve core 802 is driven by the valve rod 801 to open or close the radial exhaust port 104. A slideway 106 is arranged on the side wall of the casing 1 and positioned outside the radial exhaust port 104, and the valve core 802 is in sliding fit in the slideway 106; the end face of the valve core 802, which is close to the valve rod 801, can block the outer side of the radial exhaust port 104, and a return spring 9 is arranged between the end face of the valve core 802, which is far away from the valve rod 801, and the slideway 106.

The utility model discloses a doublestage screw compressor can slide in installation cavity 105 through driver drive valve rod 801 to adjust radial exhaust size of radial gas vent 104, change its internal volume ratio, make final pressure and exhaust pressure assorted, reach effects such as reduce the energy consumption, noise reduction.

Claims

1. The bipolar screw compressor comprises a shell and a driving device, wherein a high-pressure cavity and a low-pressure cavity are arranged in the shell, a high-pressure rotor set is arranged in the high-pressure cavity, and a low-pressure rotor set is arranged in the low-pressure cavity; the high-pressure rotor set is in transmission connection with the low-pressure rotor set through a transmission assembly, and the driving device is connected with the low-pressure rotor set; the method is characterized in that: the high-pressure chamber and the low-pressure chamber are provided with a gas transmission channel therebetween, one end of the high-pressure chamber is provided with a radial exhaust port, the radial exhaust port is provided with an internal volume ratio adjusting slide valve, and the internal volume ratio adjusting slide valve can adjust the size of the radial exhaust port.

2. The bipolar screw compressor of claim 1 wherein: the internal volume ratio regulating slide valve comprises a valve rod and a valve core; the side wall of the high-pressure cavity is provided with a mounting cavity, the valve rod is in sliding fit in the mounting cavity, the valve rod is connected with a driver, and the driver drives the valve rod to slide back and forth in the mounting cavity; the valve core is connected to one end of the valve rod, and the valve core can open or close the radial exhaust port under the driving of the valve rod.

3. The bipolar screw compressor of claim 2 wherein: a slide way is arranged on the side wall of the shell and positioned at the outer side of the radial exhaust port, and the valve core is in sliding fit in the slide way; the valve core is close to the end face of the valve rod and can block the outer side of the radial exhaust port, and a return spring is arranged between the end face of the valve core, which is far away from the valve rod, and the slideway.

4. The bipolar screw compressor of claim 1 wherein: the transmission assembly comprises a high-pressure gear and a low-pressure gear, the high-pressure gear is arranged on the rotating shaft of the male rotor of the high-pressure rotor set, and the low-pressure gear is arranged on the rotating shaft of the male rotor of the low-pressure rotor set; the high-pressure gear is meshed with the low-pressure gear.

5. The bipolar screw compressor of claim 4 wherein: an end cover is arranged at one end of the shell, a gear accommodating cavity is formed between the end cover and the end part of the shell, and the gear accommodating cavity is communicated with the high-pressure cavity and the low-pressure cavity; the high-pressure gear and the low-pressure gear are both arranged in the gear accommodating cavity.

6. The bipolar screw compressor of claim 1 wherein: the low-pressure cavity is positioned right above the high-pressure cavity, and the high-pressure rotor set is positioned right above the low-pressure rotor set.

7. The bipolar screw compressor of claim 6 wherein: the outer diameter of the male rotor of the low-pressure rotor set is larger than that of the male rotor of the high-pressure rotor set; the length-diameter ratio of the rotor of the low-pressure rotor set is larger than that of the rotor of the high-pressure rotor set.