CN205370989U - Single screw compressor with adjustable star wheel axle system - Google Patents

Abstract

The utility model discloses a single screw compressor with adjustable star wheel axle system, efficient, the good reliability of its regulation. Which comprises a housing, be equipped with a mechanical seal device and the 2nd mechanical seal device on the casing, the screw rod forms sealed cooperation through a mechanical seal device and the 2nd mechanical seal device with the casing, the screw rod still meshes with two star gears that become the symmetry setting mutually, the star gear is established on the star gear support, the star gear support cup joints with star wheel axle mutually, star gear support and star wheel axle sliding fit in the axial, the one side that lies in the star gear support on star wheel axle is equipped with the first external screw thread that supplies first accurate lock nut threaded connection, the opposite side that lies in the star gear support on star wheel axle is equipped with the second external screw thread that supplies the accurate lock nut threaded connection of second, first accurate lock nut forms the roof pressure cooperation with the star gear support, the accurate lock nut of second forms the roof pressure cooperation with the star gear support.

Description

A single-screw compressor with adjustable star wheel shafting

technical field

The utility model belongs to the technical field of single-screw compressors, in particular to a star wheel shaft system structure on a single-screw compressor.

Background technique

The single-screw compressor is a high-precision meshing pair composed of a screw and two star wheels, and the degree of meshing directly affects the efficiency of the single-screw compressor. The factors affecting the meshing accuracy of the pair of meshing pairs are not only the machining accuracy of the screw and the star wheel, but also the position accuracy of the star wheel relative to the screw. One of the items controlling the position accuracy of the star wheel relative to the screw is the gap between the star wheel and the casing split surface. This gap is a fixed value after the design of the unit is completed, and it should not be larger or smaller. There are generally three types of structures on the market for adjusting and controlling this gap, namely: correction plate adjustment, adjustment pad adjustment and adjustment screw adjustment.

The adjustment of the correction sheet and the adjustment of the adjustment pad are used to control the gap between the star wheel and the split surface of the casing by grinding the thickness of the correction sheet or increasing or decreasing the number of adjustment pads during on-site assembly. These two adjustment methods can ensure that the gap between the unit There will be no change during operation, and the reliability is high, but the assembly and adjustment efficiency is low. In order to ensure the above-mentioned clearance is in a reasonable range, it often needs to be disassembled and assembled many times, which is time-consuming and labor-intensive.

The adjusting screw adjustment structure mostly uses the adjusting screw to push the position of the bearing so as to control the above-mentioned gap within a reasonable range. This structure solves the problem of low assembly efficiency of the unit, but because the end face diameter of the adjusting screw is small, and the star wheel There is a large axial force, the adjustment surface is easily deformed by force, and because the vibration adjustment screw of the unit is easy to loose during operation, the reliability is poor.

Contents of the invention

The purpose of the utility model is to provide a single-screw compressor with an adjustable star wheel shaft system, which has high adjustment efficiency and good reliability.

For solving the problems of the technologies described above, the purpose of this utility model is achieved in that:

Including the casing, the casing is provided with a first mechanical seal device and a second mechanical seal device, the screw shaft forms a sealing fit with the casing through the first mechanical seal device and the second mechanical seal device, and the free end of the screw shaft is exposed It is connected to the inner ring of the free end bearing on the outside of the first mechanical seal device, the power end of the screw shaft is exposed outside the second mechanical seal device and connected to the inner ring of the fixed end bearing, the fixed end bearing and the free end The bearings are respectively arranged on the fixed-end bearing seat and the free-end bearing seat, and the fixed-end bearing seat and the free-end bearing seat are respectively arranged on both ends of the casing, and the screw fixed on the screw shaft and the two symmetrically arranged star wheels The star wheel is set on the star wheel bracket, the star wheel bracket is socketed with the star wheel shaft, and the star wheel bracket and the star wheel shaft are slidably matched in the axial direction. On the side of the star wheel bracket on the star wheel shaft, there is a The first external thread connected by a precision lock nut is threaded, and the other side of the star wheel bracket on the star wheel shaft is provided with a second external thread for screw connection by a second precision lock nut. The first precision lock nut and the star wheel The wheel support forms a press fit, and the second precision lock nut forms a press fit with the star wheel support.

On the basis of the above-mentioned solution and as a preferred solution of the above-mentioned solution: the first precision lock nut includes a nut body one threaded on the first external thread, and the end of the nut body one forms a press fit with the star wheel bracket. The nut body 1 is provided with a set screw hole 1, and the set screw hole 1 is threadedly connected with a set screw 1. The nut body 1 is also provided with an inner sleeve hole 1, and the inner sleeve hole 1 is slidably fitted with an inner sleeve 1. , on the side of the inner sleeve one opposite to the first external thread, there is a thread section one, and the thread section one is engaged with the thread teeth of the first external thread, and the inner sleeve one has the same shape as the first external thread by means of the set screw one The tight contact position of the external thread and the close contact position between the inner sleeve and the first external thread are released.

On the basis of the above scheme and as a preferred scheme of the above scheme: the second precision lock nut includes a nut body two threaded on the second external thread, and the end of the nut body two forms a press fit with the star wheel bracket, The nut body 2 is provided with a set screw hole 2, and the set screw hole 2 is threadedly connected with the set screw 2, and the nut body 2 is also provided with an inner sleeve hole 2, and the inner sleeve hole 2 is slidably fitted with the inner sleeve 2 , on the side opposite to the second external thread on the inner sleeve 2, there is a thread section 2, the thread section 2 is engaged with the thread of the second external thread, and the inner sleeve 2 has the same shape as the second external thread by means of the set screw 2 The tight contact position of the outer thread and the tight contact position between the second inner sleeve and the second outer thread are released.

On the basis of the above scheme and as the preferred scheme of the above scheme: the star wheel is installed on the star wheel bracket through a pin, one end of the disc spring is against the shoulder of the nut body 2, and the other end of the disc spring is against the star wheel and the pin superior.

Compared with the prior art, the utility model has outstanding and beneficial technical effects as follows:

In the single-screw compressor with adjustable star wheel shaft system of the utility model, the star wheel support is fixed in the axial direction through the first precision lock nut and the second precision lock nut to simultaneously press against the star wheel support. When the first precision lock nut or the second precision lock nut releases the star wheel support, turn the precision lock nut accordingly to change its position relative to the star wheel shaft, and adjust the star wheel and the casing The gap between the split faces. Furthermore, by setting the structure of the set screw and the inner sleeve, while fixing the relative position of the nut body and the star wheel shaft, it also ensures that the gap after adjustment does not change. This star wheel shafting structure has high adjustment efficiency and good reliability.

Description of drawings

Fig. 1 is a sectional view of the overall structure of the utility model.

Fig. 2 is a structural schematic diagram of the star wheel shaft system of the present invention.

Fig. 3 is a schematic structural diagram of the first precision lock nut.

Fig. 4 is a schematic structural diagram of the second precision lock nut.

detailed description

The utility model will be further described with specific embodiments below in conjunction with the accompanying drawings, see Fig. 1-Fig. 4;

This embodiment provides a single-screw compressor with an adjustable star wheel shaft system, including a casing 10, on which a first mechanical seal device 20 and a second mechanical seal device 30 are arranged, and the screw shaft passes through the first The mechanical seal device 20 and the second mechanical seal device 30 form a sealing fit with the casing 10, and the free end of the screw shaft is exposed 401 outside the first mechanical seal device 20 and connected with the inner ring 501 of the free end bearing 50, the screw shaft The power end 402 of the shaft is exposed outside the second mechanical seal device 30 and is connected to the inner ring 601 of the fixed end bearing 60. The fixed end bearing 60 and the free end bearing 50 are respectively arranged in the fixed end bearing seat 70 and the free end bearing seat 80, the fixed end bearing seat 70 and the free end bearing seat 80 are respectively arranged on both ends of the casing 10, and the screw 40 fixed on the screw shaft is also meshed with two symmetrically arranged star wheels 1, and the star wheel 1 It is arranged on the star wheel support 2, and the star wheel support 2 is socketed with the star wheel shaft 3. The two ends of the star wheel shaft 3 are installed on the bearing seat through bearings 41, 42 respectively, and the bearing seat is installed on the casing of the single-screw compressor. In this embodiment, the star wheel bracket 2 and the star wheel shaft 3 are slidably fitted in the axial direction, and the star wheel bracket can slide axially relative to the star wheel shaft, thereby adjusting the gap between the star wheel and the dividing surface on the casing .

One side of the star wheel bracket 2 on the star wheel shaft 3 is provided with a first external thread 61 for threaded connection of the first precision lock nut 5, and the other side of the star wheel bracket 2 on the star wheel shaft 3 is provided with a second Two precision lock nuts 7 are threadedly connected to the second external thread 62 . Specifically, a first external thread is provided on the star wheel shaft, and the first external thread is used for threaded connection with the first precision lock nut, and the first precision lock nut is used to form a press fit with the star wheel bracket; on the star wheel shaft A second external thread is also provided, and the second external thread is used for threaded connection with the second precision lock nut, and the first precision lock nut is used to form a press fit with the star wheel bracket. At the same time, the first precision lock nut and the second precision lock nut are pressed against the star wheel support so that the star wheel support is fixed in the axial direction. When the first precision lock nut or the second precision lock nut releases the star wheel support, turn the precision lock nut accordingly to change its position relative to the star wheel shaft, and adjust the star wheel and the casing The gap between the split faces.

In this embodiment, the above-mentioned first precision lock nut 5 includes a nut body 1 51 threadedly connected to the first external thread. There are external threads, and the two of them realize the threaded connection between the nut body and the star wheel shaft. The end 511 of the nut body 1 forms a pressing fit with the star wheel bracket 2. When the nut body is screwed in, it is tightly pressed against the star wheel bracket, and when the nut body is loosened, it is released from tight contact with the star wheel bracket. Set screw hole 1 52 is provided on nut body 1 51, set screw 1 53 is threadedly connected in set screw hole 1, and inner sleeve hole 1 54 is also provided in nut body 1 51, inner sleeve hole 1 54 The inner sleeve one 55 is slidingly fitted, and the inner sleeve one is provided with a thread section one 56 on the side opposite to the first external thread, and the thread section one 56 is engaged with the thread teeth of the first external thread 61, and the thread section one 56 is engaged with the thread of the first external thread 61. The fixed screw enables the inner sleeve to have a tight contact position with the first external thread and releases the position where the inner sleeve is tightly abutted with the first external thread. When using the first precision lock nut, turn the set screw 1 in the tightening direction, and the set screw 1 moves in the direction of the first external thread so that the thread segment of the inner sleeve is tightly engaged with the thread of the first external thread, so that the nut Body one and the star wheel shaft remain relatively fixed. Loosen the set screw 1 to release the tight engagement between the thread section of the inner sleeve 1 and the thread of the first external thread, so that the nut body 1 can rotate to adjust the gap. In addition, since the rotation direction of the set screw 1 is different from that of the nut body 1, with this structure, after the clearance is adjusted in place, the nut body 1 can be prevented from rotating when the set screw 1 is tightened, ensuring the adjusted The star wheel clearance does not change.

The second precision lock nut 7 comprises a nut body two 71 threadedly connected on the second external thread 62, as shown in the figure, an internal thread is provided on the nut body two, an external thread is provided on the star wheel shaft, and the second The latter realizes that the nut body two is threadedly connected with the star wheel shaft. The end 711 of the nut body 2 71 forms a press fit with the star wheel bracket 2. Specifically, when the nut body is screwed in, it is pressed against the star wheel bracket, and when the nut body is loosened, it is released from the star wheel bracket. Set screw hole 2 72 is provided on nut body 2 71, set screw 2 73 is threadedly connected in set screw hole 2 72, inner sleeve hole 2 74 is also provided in nut body 2 71, inner sleeve hole 2 74 is slidingly fitted with an inner sleeve 2 75, and the inner sleeve 75 is provided with a thread section 2 76 on the side opposite to the second external thread, and the thread section 2 is engaged with the thread of the second external thread. The set screw 2 enables the inner sleeve 2 to have a tight contact position with the second external thread and releases the position where the inner sleeve 2 is tightly contacted with the second external thread. When the second precision lock nut is used, tighten the set screw 2 so that the thread segment of the inner sleeve 2 is tightly engaged with the thread of the second external thread, so that the nut body 2 and the star wheel shaft remain relatively fixed; loosen and tighten The screw 2 releases the tight engagement between the thread section of the inner sleeve 2 and the thread of the second external thread, so that the nut body 2 can rotate to adjust the gap. In addition, since the rotation direction of the set screw 2 is different from that of the nut body 2, with this structure, after the gap is adjusted in place, the nut body can be prevented from rotating when the set screw 2 is tightened, ensuring the adjusted The star wheel clearance does not change.

In this embodiment, the star wheel 1 is installed on the star wheel bracket 2 through pins 8, as shown in the figure, the pins pass through the star wheel and the star wheel bracket. One end of the disc spring 9 is against the shoulder 712 of the nut body 2 71, and the other end of the disc spring is against the star wheel and the pin.

The foregoing embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore: all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered by this utility model. within the scope of protection of utility models.

Claims (4)

1. null1. the adjustable single screw compressor of spider gear shaft system，Including casing,Casing is provided with the first mechanically-sealing apparatus and the second mechanically-sealing apparatus，Screw shaft forms sealing by the first mechanically-sealing apparatus and the second mechanically-sealing apparatus with casing and coordinates，And the free end of screw shaft is exposed at the outside of the first mechanically-sealing apparatus and is connected with the inner ring of free end bearing，The power end of screw shaft is exposed at the outside of the second mechanically-sealing apparatus and is connected with the inner ring of fixing end bearing，Fixing end bearing and free end bearing are respectively arranged in fixing end bearing block and free end shaft bearing，Fixing end bearing block and free end shaft bearing are respectively arranged on the two ends of casing，It is fixed on the screw rod on screw shaft and two symmetrically arranged star-wheels of one-tenth are meshed，Star-wheel is located on star-wheel support，Star-wheel support and spider gear shaft socket-connect，It is characterized in that: star-wheel support and spider gear shaft are slidably matched in the axial direction，The side being positioned at star-wheel support on spider gear shaft is provided with mean for the first external screw thread that the first accurate locking nut is threaded，The opposite side being positioned at star-wheel support on spider gear shaft is provided with mean for the second external screw thread that the second accurate locking nut is threaded，First accurate locking nut forms top press-fit with star-wheel support，Second accurate locking nut forms top press-fit with star-wheel support.
2. 2. the adjustable single screw compressor of spider gear shaft system according to claim 1, it is characterized in that: the first accurate locking nut includes the nut body one being threaded on the first external screw thread, the end of nut body one forms top press-fit with star-wheel support, nut body one is provided with set screw hole one, threaded in set screw hole one have holding screw one, nut body one is additionally provided with interior trepanning one, interior trepanning one is sliding combined with inner sleeve one, one side relative with the first external screw thread in inner sleeve one is provided with threaded section one, threaded section one is engaged mutually with the first externally threaded thread, by holding screw one make inner sleeve one have with the first external screw thread tight against position and release inner sleeve one and the first external screw thread tight against position.
3. 3. the adjustable single screw compressor of spider gear shaft system according to claim 1, it is characterized in that: the second accurate locking nut includes the nut body two being threaded on the second external screw thread, the end of nut body two forms top press-fit with star-wheel support, nut body two is provided with set screw hole two, threaded in set screw hole two have holding screw two, nut body two is additionally provided with interior trepanning two, interior trepanning two is sliding combined with inner sleeve two, one side relative with the second external screw thread in inner sleeve two is provided with threaded section two, threaded section two is engaged mutually with the second externally threaded thread, by holding screw two make inner sleeve two have with the second external screw thread tight against position and release inner sleeve two and the second external screw thread tight against position.
4. 4. the adjustable single screw compressor of spider gear shaft system according to claim 1, it is characterised in that: star-wheel is arranged on star-wheel support by pin, and one end of disc spring is butted on the convex shoulder of nut body two, and the other end of disc spring is butted on star-wheel and pin.