CN202867345U - Multistage centrifugal compressor and chilled water type air conditioning unit with same - Google Patents
Multistage centrifugal compressor and chilled water type air conditioning unit with same Download PDFInfo
- Publication number
- CN202867345U CN202867345U CN 201220586319 CN201220586319U CN202867345U CN 202867345 U CN202867345 U CN 202867345U CN 201220586319 CN201220586319 CN 201220586319 CN 201220586319 U CN201220586319 U CN 201220586319U CN 202867345 U CN202867345 U CN 202867345U
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- Prior art keywords
- centrifugal compressor
- multistage centrifugal
- inner chamber
- return channel
- supporting element
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Abstract
The utility model provides a multistage centrifugal compressor and a chilled water type air conditioning unit with the same. The multistage centrifugal compressor comprises a casing (10) and a backflow device (20) arranged in the casing (10). An inner wall of the casing (10) forms a first inner cavity (11), the backflow device (20) is provided with a second inner cavity (21) matched with the first inner cavity (11), the first inner cavity (11) is communicated with the second inner cavity (21), and the first inner cavity (11) and the second inner cavity (21) form an air compensating cavity of the multistage centrifugal compressor. The chilled water type air conditioning unit comprises the multistage centrifugal compressor. According to the multistage centrifugal compressor and the chilled water type air conditioning unit with the multistage centrifugal compressor, the problem that the volume of the air compensating cavity is small so that efficiency of the compressor is low in the prior art is solved.
Description
Technical field
The utility model relates to technical field of refrigeration equipment, in particular to a kind of multistage centrifugal compressor and have its cold water formula air-conditioning unit.
Background technique
Return channel 10 ' the structure of generally using in the multistage centrifugal compressor at present specifically referring to shown in Figure 1, uses the cavity of return channel 10 ' inside as tonifying Qi chamber 20 ' more.But because return channel the 10 ' finite volume own, the volume in tonifying Qi chamber 20 ' just can not be done greatly, causes the two-stage compression tonifying Qi even not, has reduced compressor efficiency.
The model utility content
The utility model aims to provide a kind of multistage centrifugal compressor and has its cold water formula air-conditioning unit, to solve compressor in the prior art because the little low problem of compressor efficiency that causes of tonifying Qi chamber volume.
To achieve these goals, the utility model provides a kind of multistage centrifugal compressor, comprise housing and the return channel that is arranged on enclosure interior, the inwall of housing is formed with the first inner chamber, return channel is provided with the second inner chamber that cooperates with the first inner chamber, the first inner chamber is communicated with the second inner chamber, and the first inner chamber and the second inner chamber form the tonifying Qi chamber of multistage centrifugal compressor.
Further, housing is fixedly connected with the sidewall of return channel, is provided with gasket seal between the sidewall of housing and return channel.
Further, return channel comprises the attachment post that is arranged in the second inner chamber, and attachment post is connected on the inwall of the second inner chamber to strengthen the intensity of return channel.
Further, attachment post is to have a plurality of and circumferentially evenly distribute along the inwall of the second inner chamber.
Further, multistage centrifugal compressor also comprises impeller, labyrinth seal spare and supporting element, labyrinth seal spare is used for the high low pressure zone of import and the outlet of obstruct impeller, supporting element is used for the fixed fingers Sealing, supporting element arranges the support surface that cooperates butt with labyrinth seal spare, the support surface is positioned at supporting element near a side of impeller inlet, and labyrinth seal spare is installed in supporting element near a side of impeller inlet and is installed on the support surface.
Further, supporting element and return channel are structure as a whole.
According on the other hand of the present utility model, a kind of cold water formula air-conditioning unit is provided, comprise above-mentioned multistage centrifugal compressor.
Use the technical solution of the utility model, multistage centrifugal compressor comprises housing and is arranged on the return channel of enclosure interior, the inwall of housing is formed with the first inner chamber, return channel is provided with the second inner chamber that cooperates with the first inner chamber, the first inner chamber is communicated with the second inner chamber, and the first inner chamber and the second inner chamber form the tonifying Qi chamber of multistage centrifugal compressor.In the situation that does not change the volume of return channel own, transform the tonifying Qi chamber of return channel as open the second inner chamber, the position corresponding with return channel is provided with the first cavity on housing, the first cavity and the second cavity consist of the tonifying Qi chamber jointly, the volume in tonifying Qi chamber is just significantly expanded like this, make the tonifying Qi air-flow more even, effectively improved compressor efficiency.
Description of drawings
The Figure of description that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the internal structure schematic representation of multistage centrifugal compressor in the prior art;
Fig. 2 shows the embodiment's of multistage centrifugal compressor of the present utility model internal structure schematic representation.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
As shown in Figure 2, the multistage centrifugal compressor of present embodiment comprises housing 10 and is arranged on the return channel 20 of housing 10 inside, the inwall of housing 10 is formed with the first inner chamber 11, return channel 20 is provided with the second inner chamber 21 that cooperates with the first inner chamber 11, the first inner chamber 11 is communicated with the second inner chamber 21, and the first inner chamber 11 and the second inner chamber 21 form the tonifying Qi chamber of multistage centrifugal compressor.
In the situation that does not change the volume of return channel own, transform the former tonifying Qi chamber of return channel as open the second inner chamber, the position corresponding with return channel is provided with the first cavity on housing, the first cavity and the second cavity consist of the tonifying Qi chamber jointly, the volume in tonifying Qi chamber is just significantly expanded like this, make the tonifying Qi air-flow more even, effectively improved compressor efficiency.
Preferably, return channel 20 comprises the attachment post 22 that is arranged in the second inner chamber 21, and attachment post 22 is connected on the inwall of the second inner chamber 21 to strengthen the intensity of return channel 20.Attachment post 22 is provided with a plurality of and evenly distributes along the inwall of the second inner chamber 21 is circumferential.
The multistage centrifugal compressor of present embodiment also comprises impeller 51, labyrinth seal spare 52 and supporting element 53, labyrinth seal spare 52 is used for the high low pressure zone of import and the outlet of obstruct impeller 51, supporting element 53 is used for fixed fingers Sealing 52, supporting element 53 arranges the support surface that cooperates butt with labyrinth seal spare 52, the support surface is positioned at supporting element 53 near a side of impeller 51 imports, and labyrinth seal spare 52 is installed in supporting element 53 near a side of impeller 51 imports and is installed on the support surface.Supporting element 53 is structure as a whole with return channel 20.
By labyrinth seal spare being arranged on supporting element near a side of impeller inlet, can assemble separately labyrinth seal spare and supporting element like this.Because labyrinth seal spare weight with respect to supporting element is very little, so just reduced the difficulty of assembling, avoided in assembly process the possibility of colliding with other objects such as enclosing cover for impeller; Simultaneously, because the change of assembly method, gap between labyrinth seal spare and the impeller outer edge can use clearance gauge to measure and adjust, so just can guarantee in the process of device operation, the broach damage that serious friction causes labyrinth seal spare can not occur between labyrinth seal spare and the impeller, reduces the inner air loss of compressor.
The utility model provides a kind of embodiment of cold water formula air-conditioning unit, and cold water formula air-conditioning unit comprises the multistage centrifugal compressor of above-described embodiment in the present embodiment, and the effect of the multistage centrifugal compressor in the present embodiment is higher.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. multistage centrifugal compressor, comprise housing (10) and be arranged on the inner return channel (20) of described housing (10), it is characterized in that, the inwall of described housing (10) is formed with the first inner chamber (11), described return channel (20) is provided with the second inner chamber (21) that cooperates with described the first inner chamber (11), described the first inner chamber (11) is communicated with described the second inner chamber (21), and described the first inner chamber (11) and described the second inner chamber (21) form the tonifying Qi chamber of described multistage centrifugal compressor.
2. multistage centrifugal compressor according to claim 1, it is characterized in that, described housing (10) is fixedly connected with the sidewall of described return channel (20), is provided with gasket seal between the sidewall of described housing (10) and described return channel (20).
3. multistage centrifugal compressor according to claim 1, it is characterized in that, described return channel (20) comprises the attachment post (22) that is arranged in described the second inner chamber (21), and described attachment post (22) is connected on the inwall of described the second inner chamber (21) to strengthen the intensity of described return channel (20).
4. multistage centrifugal compressor according to claim 3 is characterized in that, described attachment post (22) is for having a plurality of and evenly distributing along the inwall of described the second inner chamber (21) is circumferential.
5. multistage centrifugal compressor according to claim 1, it is characterized in that, also comprise impeller (51), labyrinth seal spare (52) and supporting element (53), described labyrinth seal spare (52) is for the high low pressure zone of the import that intercepts described impeller (51) and outlet, described supporting element (53) is used for fixing described labyrinth seal spare (52), described supporting element (53) arranges the support surface that cooperates butt with described labyrinth seal spare (52), described support surface is positioned at described supporting element (53) near a side of described impeller (51) import, and described labyrinth seal spare (52) is installed in described supporting element (53) near a side of described impeller (51) import and is installed on the described support surface.
6. multistage centrifugal compressor according to claim 5 is characterized in that, described supporting element (53) is structure as a whole with described return channel (20).
7. a cold water formula air-conditioning unit is characterized in that, comprises each described multistage centrifugal compressor in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586319 CN202867345U (en) | 2012-11-07 | 2012-11-07 | Multistage centrifugal compressor and chilled water type air conditioning unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220586319 CN202867345U (en) | 2012-11-07 | 2012-11-07 | Multistage centrifugal compressor and chilled water type air conditioning unit with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867345U true CN202867345U (en) | 2013-04-10 |
Family
ID=48034068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220586319 Withdrawn - After Issue CN202867345U (en) | 2012-11-07 | 2012-11-07 | Multistage centrifugal compressor and chilled water type air conditioning unit with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867345U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807215A (en) * | 2012-11-07 | 2014-05-21 | 珠海格力电器股份有限公司 | Multistage centrifugal compressor and cold water type air conditioning unit provided with same |
| WO2016019689A1 (en) * | 2014-08-07 | 2016-02-11 | 珠海格力电器股份有限公司 | Multi-stage compressor and air conditioner |
-
2012
- 2012-11-07 CN CN 201220586319 patent/CN202867345U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807215A (en) * | 2012-11-07 | 2014-05-21 | 珠海格力电器股份有限公司 | Multistage centrifugal compressor and cold water type air conditioning unit provided with same |
| CN103807215B (en) * | 2012-11-07 | 2015-12-16 | 珠海格力电器股份有限公司 | Multistage centrifugal compressor and there is its cold water formula air-conditioner set |
| WO2016019689A1 (en) * | 2014-08-07 | 2016-02-11 | 珠海格力电器股份有限公司 | Multi-stage compressor and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130410 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |