CN207197009U - Refrigerant flow regulating mechanism and refrigerating device - Google Patents

Abstract

The utility model discloses a refrigerant flow regulating mechanism and a refrigeration device. The refrigerant flow regulating mechanism includes: a blade, a kinematic pair and a driving part, and a plurality of blades are spliced sequentially along the circumferential direction of the axis of the casing to form a blade assembly, and any two adjacent blades in the blade assembly can be connected to each other. Slidingly arranged, the vane assembly is installed on the housing through the kinematic pair; the vane assembly includes an open state and a closed state, and the plurality of vanes jointly form a flow passage in the open state, The plurality of blades close the flow passage in the closed state; the driving part drives the blades to move through the kinematic pair to open or close the flow passage. The utility model can move the blades through the driving part, thereby adjusting the opening area of the flow passage, and can adapt to different working conditions and different loads of the unit.

Description

Refrigerant flow regulating mechanism and refrigeration device

technical field

The utility model relates to the technical field of refrigeration, in particular to a refrigerant flow regulating mechanism and a refrigeration device.

Background technique

In the prior art, large-scale centrifugal units mainly use liquid supply throttling mechanisms controlled by orifice plates, for example: secondary orifice plates, primary orifice plates, or primary orifice plates + regulating valve throttling mechanisms.

Among them, the principle of the second-stage orifice plate throttling mechanism is: when the refrigerant passes through the first-stage orifice plate, it just exceeds the saturated liquid line, and at the same time generates a little flash gas; because the flash gas occupies a part of the space in the pipeline, its The flow rate changes, causing the refrigerant flow rate to change within a certain range when the refrigerant enters the second-stage orifice plate, thereby realizing the function of automatically adjusting the refrigerant flow rate; the second-stage orifice plate produces different pressure drop changes due to the change in flow rate, After adjusting the high and low pressure difference with the system to achieve dynamic balance, the throttling and pressure reducing functions of the refrigerant can be stably exerted, thereby completing the entire refrigeration cycle. When the refrigeration unit operates under standard working conditions, the amount of liquid supplied to the evaporator from the orifice plate can match the evaporation load, and the unit can operate stably and normally. In fact, the unit often operates under changing conditions and loads. At this time, the operation of the unit is prone to fluctuations. When the load is high, when the operation of the unit changes from high load to low load, it will have a great impact on the operation of the unit. Compared with the secondary orifice plate, the regulation ability of the primary orifice plate, or the primary orifice plate + regulating valve is lower. Therefore, although the primary orifice plate and the secondary orifice plate can be automatically adjusted within a certain range, their ability to cope with variable working conditions and variable loads is poor, and they are mainly suitable for centrifugal refrigeration compressors with fixed working conditions;

It can be seen that the liquid supply throttling mechanism controlled by the orifice plate in the prior art has poor ability to cope with variable working conditions and variable loads. load situation.

Utility model content

In the embodiment of the utility model, a refrigerant flow regulating mechanism and a refrigeration device are provided to solve the problem that the liquid supply throttling mechanism controlled by the orifice plate in the prior art cannot effectively adjust the flow rate, and it is difficult to adapt to changes in working conditions and variable loads. The problem of the situation.

In order to achieve the above purpose, the embodiment of the utility model provides a refrigerant flow regulating mechanism, including: blades, a kinematic pair and a driving part. A plurality of the blades are sequentially spliced along the circumferential direction of the axis of the housing to form a blade assembly. Any two adjacent blades in the blade assembly are slidably arranged, and the blade assembly is mounted on the housing through the kinematic pair; the blade assembly includes an open state and a closed state, and the plurality of blades In the open state, a flow channel is jointly formed, and the plurality of vanes close the flow channel in the closed state; the driving part drives the blades to move through the kinematic pair to open or close the flow channel. the flow channel described above.

Preferably, the kinematic pair includes a chute part and a guide rail matched with the chute part, one guide rail is installed on each of the blades, and a plurality of the chute is installed on the housing Each of the guide rails is slidably connected to one of the slide slots.

Preferably, the axes of the plurality of chute parts intersect to form a regular polygon.

Preferably, the refrigerant flow regulating mechanism further includes a transmission mechanism, and the driving part drives the blades to move through the transmission mechanism.

Preferably, each of the blades is respectively equipped with a rack that cooperates with the transmission mechanism.

Preferably, the transmission mechanism includes a driving gear and a driven gear for driving the rack, the driving gear is connected to the output end of the driving part, and the driving gear meshes with the driven gear.

Preferably, the transmission mechanism further includes an adjustment gear, the adjustment gear is fixedly installed on the end surface of the driven gear, and the adjustment gear meshes with the rack.

Preferably, the adjusting gear has a diameter smaller than that of the driven gear.

Preferably, the refrigerant flow regulating mechanism further includes a case cover mounted on the opening side of the housing, and the driven gear is pivotably connected to the case cover.

Preferably, any two adjacent blades are slidably connected through a sliding structure.

Preferably, the sliding structure includes a groove provided on one of the two adjacent blades and a rib provided on the other of the two adjacent blades, the rib Actively set in the groove.

Preferably, the rib cooperates with the groove to form a labyrinth seal structure.

Preferably, each of the blades includes an included angle portion that is in contact with the blades on both sides of each of the blades, and the angle of the included angle portion satisfies:

α＝360°/Z

Wherein, α is the angle of the included corner, and Z is the number of the blades.

Preferably, the maximum opening area of the flow channel is A, then A=780-9760mm ² .

Preferably, the driving part is an electric actuator.

Preferably, the opening area of the flow channel is B, and the rotation angle of the electric actuator is θ, then

Preferably, the transmission mechanism includes a worm wheel and a worm, wherein the driving part drives the worm wheel to rotate through the worm, the adjusting gear is fixedly installed on the end surface of the worm wheel, and the adjusting gear is connected to the The rack meshes.

The utility model also provides a refrigerating device, which includes the above-mentioned refrigerant flow regulating mechanism.

Due to the adoption of the above technical scheme, the utility model can move the blades through the driving part, thereby adjusting the opening area of the flow passage, so as to realize the purpose of adjusting the size of the throttle hole to adjust the refrigerant flow rate, so it can adapt to different working conditions of the unit , Different loads can maximize the energy efficiency of the unit during operation and greatly reduce operating costs. Due to the wide range of operating conditions of the unit, it can greatly reduce the number of models and reduce the amount of development.

Description of drawings

Fig. 1 is a top view of a refrigerant flow regulating mechanism according to an embodiment of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 2;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is a schematic diagram of a flow channel formed by blades;

Fig. 6 is a graph showing the variation of the opening area of the flow channel with the rotation angle of the electric actuator in the embodiment of the present invention;

Fig. 7 is a schematic diagram of an embodiment using worm gear transmission in the embodiment of the present invention.

Explanation of reference signs: 1. blade; 2. housing; 3. flow channel; 4. chute; 5. guide rail; 6. rack; 7. driving gear; 8. driven gear; 9. adjusting gear ; 10, shell cover; 11, drive unit; 12, actuator seat; 13, drive shaft; 14, worm gear; 15, worm.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

The embodiment of the utility model provides a refrigerant flow regulating mechanism. Referring to FIGS. The blade assembly is sequentially spliced in the circumferential direction, and any adjacent two blades 1 in the blade assembly are slidably arranged, and the blade assembly is installed on the housing 2 through the kinematic pair; the blade assembly Including an open state and a closed state, the plurality of vanes 1 jointly form a flow passage 3 in the open state, and the plurality of vanes 1 close the flow passage 3 in the closed state; the driving The part 11 drives the vane 1 to move through the kinematic pair to open or close the flow channel 3 .

The flow passage 3 is located at the center of the blades 1. When the blade 1 moves away from the axis of the housing 2 under the action of the drive part 11, the flow passage 3 opens, and as the blades gradually move away from the axis, the flow flow The area of track 3 gradually increases. On the contrary, the area of the overcurrent channel 3 gradually decreases until the overcurrent channel 3 is completely closed. Therefore, through the above method, precise automatic adjustment of the refrigerant flow rate under all working conditions and variable load conditions can be realized. Preferably, the maximum opening area of the flow channel 3 is A, then A=780-9760mm ² .

It can be seen that due to the adoption of the above technical solution, the utility model can move the blade 1 through the driving part 11, thereby adjusting the opening area of the flow channel 3, so as to realize the purpose of adjusting the size of the orifice to adjust the refrigerant flow rate, and thus can Adapt to different working conditions and different loads of the unit, maximize the energy efficiency during the operation of the unit, and greatly reduce the operating cost. Due to the wide range of operating conditions of the unit, it can greatly reduce the number of models and reduce the amount of development.

Preferably, the kinematic pair includes a chute part 4 and a guide rail 5 cooperating with the chute part 4, one guide rail 5 is installed on each of the blades 1, and a guide rail 5 is installed on the housing 2 Each of the guide rails 5 is slidably connected to one of the sliding slot parts 4 . The guide rail 5 is arranged in the groove of the slide groove part 4, and the slide groove part 4 can be mounted on the end surface of the housing 2 by screws or the like. In this way, the guide rail 5 can provide guidance for each vane, so that it can move in a predetermined direction, so as to realize the opening and closing of the flow channel 3 . Preferably, the axes of the plurality of chute parts 4 intersect to form a regular polygon.

Preferably, the refrigerant flow regulating mechanism further includes a transmission mechanism, and the driving part 11 drives the blade 1 to move through the transmission mechanism. More preferably, each blade 1 is respectively equipped with a rack 6 that cooperates with the transmission mechanism. In this way, the driving part 11 can drive the rack 6 to move through the transmission mechanism, and since the rack 6 is connected with the blade 1 , it can drive the blade 1 to move.

In a preferred embodiment, the transmission mechanism includes a driving gear 7 and a driven gear 8 for driving the rack 6, the driving gear 7 is connected to the output end of the driving part 11, and the driving gear 7 meshes with the driven gear 8. In this embodiment, the driven gear is driven to move the rack 6 . Apparently, the driven gear can mesh with the rack 6, or can be driven and connected with the rack 6 through other transition gears.

For example, in a preferred embodiment, the transmission mechanism further includes an adjustment gear 9, the adjustment gear 9 is fixedly installed on the end face of the driven gear 8, and the adjustment gear 9 is connected to the rack 6 meshes. In order to realize the adjustment of the transmission ratio, preferably, the diameter of the adjusting gear 9 is smaller than the diameter of the driven gear 8 .

In an alternative embodiment, the transmission mechanism may also adopt a worm gear mechanism, so as to facilitate the installation of an electric actuator. For example, in the embodiment shown in FIG. 7 , the transmission mechanism includes a worm wheel 14 and a worm screw 15, wherein the driving part 11 drives the worm wheel 14 to rotate through the worm screw 15, and the adjusting gear 9 is fixedly installed on the end face of the worm wheel 14. , the adjusting gear 9 meshes with the rack 6 .

Preferably, the refrigerant flow regulating mechanism further includes a case cover 10 mounted on the opening side of the housing 2 , and the driven gear 8 is pivotally connected to the case cover 10 . For example, an annular flange can protrude from the end surface of the case cover 10 facing the housing 2 , and the driven gear 8 can be mounted on the flange.

Preferably, any two adjacent blades 1 are slidably connected through a sliding structure. In this way, the sliding structure can provide guidance for the blades, and the joints between two adjacent blades 1 can be spliced completely without being staggered during the movement.

More preferably, the sliding structure includes a groove provided on one of the two adjacent blades 1 and a rib provided on the other of the two adjacent blades 1 , the rib is movably arranged in the groove. Preferably, the rib cooperates with the groove to form a labyrinth seal structure. At this time, the refrigerant lubrication of the unit can be used to achieve the purpose of sliding without resistance.

In this way, since the liquid refrigerant forms a pressure difference ΔP before and after the throttling of the blade 1, even if a small amount of refrigerant leaks from the high-pressure side to the low-pressure side through the labyrinth seal structure, it will not affect the throttling effect, which is consistent with the orifice plate. Throttling principle.

Preferably, each of the blades 1 includes an included corner that is in contact with the blades 1 on both sides of each of the blades 1, and the angle of the included corner satisfies:

α＝360°/Z

Wherein, α is the angle of the included corner, and Z is the number of the blades.

Therefore, the opening adjustment range of the blade-type refrigerant flow regulating mechanism in the present invention can be from fully closed to fully open, and the minimum opening value and the maximum opening value can be set according to the actual needs of the unit, and the number of blades can be adjusted according to the actual needs of the unit. The actual situation is adjusted, and the range of the adjustment opening can be adjusted according to the actual situation of the unit, and can also be adjusted according to the way of changing the transmission ratio.

Preferably, the driving part 11 is an electric actuator. Therefore, the electric actuator can be used to control the opening of the overcurrent channel 3 to adjust the flow rate, which can realize automatic control and is very simple to control. For example, the electric actuator is installed on the actuator seat 12, the output end of the electric actuator can be connected to the driving shaft 13 through the sleeve, and the driving gear is installed on the driving shaft 13, which can realize accurate and reliable transmission.

Please refer to Fig. 5, preferably, the opening area of the flow channel is B, and the rotation angle of the electric actuator is θ, then

The utility model also provides a refrigerating device, which includes the above-mentioned refrigerant flow regulating mechanism.

Of course, the above are preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the basic principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (18)

1. A kind of 1. refrigerant flow regulating mechanism, it is characterised in that including：Blade (1), kinematic pair and drive division (11), it is multiple The circumference of axis of the blade (1) along housing (2) is spliced to form blade assembly successively, the arbitrary neighborhood in the blade assembly It is mounted slidably between two blades (1), the blade assembly is installed on the housing (2) by the kinematic pair；

   The blade assembly includes open mode and closed mode, the multiple blade (1) common shape in the open mode Into a flow channels (3), the multiple blade (1) closes the flow channels (3) in the closed mode；

   The drive division (11) drives the blade (1) by the motion secondary motion to open or close the flow channels (3)。
2. 2. refrigerant flow regulating mechanism according to claim 1, it is characterised in that the kinematic pair includes slide groove portion (4) guide rail (5) and with the slide groove portion (4) coordinated, is each mounted on a guide rail (5) on the blade (1), Multiple slide groove portions (4) are installed, each guide rail (5) can slide with a slide groove portion (4) on the housing (2) Connect dynamicly.
3. 3. refrigerant flow regulating mechanism according to claim 2, it is characterised in that the axle of the multiple slide groove portion (4) A regular polygon is formed after line is intersecting.
4. 4. refrigerant flow regulating mechanism according to claim 1, it is characterised in that the refrigerant flow regulating mechanism Also include transmission mechanism, the drive division (11) drives the blade (1) to move by the transmission mechanism.
5. 5. refrigerant flow regulating mechanism according to claim 4, it is characterised in that pacify respectively on each institute's blade (1) Equipped with the rack (6) coordinated with the transmission mechanism.
6. 6. refrigerant flow regulating mechanism according to claim 5, it is characterised in that the transmission mechanism includes driving tooth Take turns (7) and the driven gear (8) for driving the rack (6), the driving gear (7) are defeated with the drive division (11) Go out end connection, the driving gear (7) is engaged with the driven gear (8).
7. 7. refrigerant flow regulating mechanism according to claim 6, it is characterised in that the transmission mechanism also includes regulation Gear (9), the adjustment gear (9) are fixedly mounted on the end face of the driven gear (8), the adjustment gear (9) with Rack (6) engagement.
8. 8. refrigerant flow regulating mechanism according to claim 7, it is characterised in that the diameter of the adjustment gear (9) Less than the diameter of the driven gear (8).
9. 9. refrigerant flow regulating mechanism according to claim 6, it is characterised in that the refrigerant flow regulating mechanism Also include the cap (10) for being installed to the housing (2) open side, the driven gear (8) and the cap (10) are pivotly Connection.
10. 10. refrigerant flow regulating mechanism according to claim 1, it is characterised in that two blades of arbitrary neighborhood (1) it is slidably connected between by slide construction.
11. 11. refrigerant flow regulating mechanism according to claim 10, it is characterised in that the slide construction includes setting Groove on a blade (1) in the two neighboring blade (1) and it is arranged in the two neighboring blade (1) Another blade (1) on fin, the fin is movably arranged as in the groove.
12. 12. refrigerant flow regulating mechanism according to claim 11, it is characterised in that the fin coordinates with the groove Form labyrinth seal structure.
13. 13. refrigerant flow regulating mechanism according to claim 1, it is characterised in that each blade (1) includes one The angle portion that the individual blade (1) with each blade (1) both sides is in contact, the angle in the angle portion meet：

    α=360 °/Z

    Wherein, α is the angle in the angle portion, and Z is the number of the blade.
14. 14. refrigerant flow regulating mechanism according to claim 1, it is characterised in that the maximum of the flow channels (3) Aperture area is A, then A=780~9760mm²。
15. 15. refrigerant flow regulating mechanism according to claim 6, it is characterised in that the drive division (11) is electronic Actuator.
16. 16. refrigerant flow regulating mechanism according to claim 15, it is characterised in that flow channels (3) are opened Open area is B, and the rotational angle of the YE is θ, then

    <mrow> <mi>B</mi> <mo>=</mo> <mfrac> <mrow> <mn>49</mn> <msup> <mi>&amp;pi;</mi> <mn>2</mn> </msup> <msup> <mi>&amp;theta;</mi> <mn>2</mn> </msup> <msqrt> <mn>3</mn> </msqrt> </mrow> <mn>1350</mn> </mfrac> <mo>+</mo> <mn>14</mn> <mi>&amp;pi;</mi> <mi>&amp;theta;</mi> <mo>+</mo> <mn>450</mn> <msqrt> <mn>3</mn> </msqrt> <mo>.</mo> </mrow>
17. 17. refrigerant flow regulating mechanism according to claim 5, it is characterised in that the transmission mechanism includes worm gear (14) and worm screw (15), wherein, the drive division (11) passes through the worm screw (15) and drives the worm gear (14) to rotate, the tune Section gear (9) is fixedly mounted on the end face of the worm gear (14), and the adjustment gear (9) is engaged with the rack (6).
18. 18. a kind of refrigerating plant, it is characterised in that including the refrigerant flow regulation any one of claim 1 to 17 Mechanism.