Temperature control valve

Abstract

The temperature control valve comprises a valve shell, a reset spring and an SMA spring, a plurality of through holes are formed in the side wall of the middle of the valve shell along the circumference, a spoke-shaped supporting frame is arranged in the middle of an inner cavity of the valve shell, the middle of the supporting frame is connected with an axially-penetrating push rod in a sliding mode, and the push rod is arranged in the middle of the valve shell. The reset spring and the SMA spring are located on the two sides of the supporting frame correspondingly, the push rod is sleeved with the SMA spring, a check ring is fixedly installed on the push rod, the SMA spring is located between the check ring and the supporting frame, a valve deck is fixedly installed at one end of the valve shell, one end of the push rod penetrates through the valve deck and is in sliding connection with the valve deck, and the other end of the push rod is in sliding connection with the supporting frame. The SMA spring, the through hole and the valve deck are located on the same side of the supporting frame. The SMA spring is adopted as a temperature sensing element, so that the temperature sensing device has the advantages of being rapid in temperature sensing, long in service life, simple in structure and high in reliability, and the failure rate of the fan is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control valve technical field, concretely is a temperature control valve. BACKGROUND

[0002] In recent years, the wind power industry has achieved rapid development. The gear box on the fan generator set needs an independent cooling circulation system for heat dissipation when operating. The cooling circulation system needs to be switched to different circulation loops according to the gear box oil temperature parameter. At present, the widely used temperature control valve in the heat dissipation system is a paraffin temperature bag type temperature control valve. It is based on the thermal expansion performance of paraffin. When the temperature of the controlled object rises, the temperature sensing element transmits the temperature change to the sealed paraffin, and the paraffin expands under heat to push the top rod to adjust the opening of the valve. The paraffin temperature bag type temperature control valve has the problems of short service life and easy jamming. SUMMARY

[0003] The utility model aims at providing a temperature control valve to solve the problems raised in the background.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a temperature control valve, comprising a valve shell, further comprising a reset spring and an SMA spring, a plurality of through holes are arranged on the circumferential side wall of the middle part of the valve shell, a spoke-shaped support frame is arranged in the middle part of the inner cavity of the valve shell, an axially penetrating push rod is slidably connected to the middle part of the support frame, the reset spring and the SMA spring are respectively arranged on the two sides of the support frame, the SMA spring is sleeved on the push rod, a retaining ring is fixedly installed on the push rod, the SMA spring is located between the retaining ring and the support frame, a valve cover is fixedly installed on one end of the valve shell, one end of the push rod penetrates through the valve cover and is slidably connected thereto, and the SMA spring, the through hole and the valve cover are located on the same side of the support frame.

[0005] Preferably, the outer diameter of the reset spring is larger than that of the SMA spring, and a section of the reset spring is gap-fitted with the inner cavity of the valve shell.

[0006] Preferably, the valve cover is provided with a balance oil hole penetrating and communicating to the inner cavity of the valve shell.

[0007] Compared with the prior art, the utility model has the advantages that the SMA spring is used as the temperature sensing element, which has the advantages of rapid temperature sensing, long service life, simple structure and high reliability, and is beneficial to reducing the fan failure caused by the failure of the temperature control valve. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is a sectional view of the utility model;

[0009] Fig. 2 It is a three-dimensional structure schematic view of the utility model;

[0010] Fig. 3 The utility model discloses a mounting schematic diagram in valve block.

[0011] In the drawing: 1, valve shell;2, support frame;3, reset spring;4, SMA spring;5, push rod;6, valve cover;7, through -hole;8, baffle ring. DETAILED DESCRIPTION

[0012] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0013] Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: a temperature control valve, including valve shell 1, reset spring 3 and SMA spring 4, the middle part side wall of valve shell 1 is provided with multiple through -holes 7 along circumference, the inner chamber middle part of valve shell 1 is equipped with spoke-like support frame 2, the middle part of support frame 2 is slidably connected with the push rod 5 of axial penetration, reset spring 3, SMA spring 4 are located at the two sides of support frame 2 respectively, the outer diameter of reset spring 3 is greater than SMA spring 4, and a section of reset spring 3 is matched with the clearance of the inner chamber of valve shell 1.

[0014] SMA spring 4 is sleeved on push rod 5, baffle ring 8 is fixedly installed on push rod 5, SMA spring 4 is located between baffle ring 8 and support frame 2, SMA spring 4 is made of shape memory alloy, and SMA spring 4 is used as temperature sensing element in addition to being used as push rod 5 driving element, with the advantages of rapid temperature sensing and long service life.Valve cover 6 is fixedly installed at one end of valve shell 1, and balance oil hole is provided on valve cover 6 and communicated to the inner chamber of valve shell 1, when valve shell 1 moves to P oil port side, the cavity formed by the oil liquid transported to valve cover 6 outside through balance oil hole, one end of push rod 5 penetrates valve cover 6 and is slidably connected with it, SMA spring 4, through -hole 7 and valve cover 6 are located at the same side of support frame 2, and reset spring 3 is designed with large diameter and high ratio.

[0015] Working principle: as Fig. 3 Shown, the valve is used in valve block, SMA spring 4 is arranged opposite reset spring 3, when medium temperature reaches lower limit value of temperature control range, SMA spring 4 gradually elongates by deformation, resets push valve shell 1 to move to P port end, until valve shell 1 reverses to position, so that oil liquid switches from P port to B port to P port to A port.

[0016] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature control valve comprising a valve housing (1), characterized in that: Reset spring (3) and SMA spring (4) are further included, a plurality of through holes (7) are arranged on the circumference of the middle side wall of the valve shell (1), a spoke-shaped support frame (2) is arranged in the middle of the inner cavity of the valve shell (1), the middle of the support frame (2) is slidingly connected with an axially penetrating push rod (5), the reset spring (3) and the SMA spring (4) are respectively arranged on the two sides of the support frame (2), the SMA spring (4) is sleeved on the push rod (5), the push rod (5) is fixedly installed with a check ring (8), the SMA spring (4) is located between the check ring (8) and the support frame (2), one end of the valve shell (1) is fixedly installed with a valve cover (6), one end of the push rod (5) penetrates through the valve cover (6) and is slidingly connected with the valve cover (6), the SMA spring (4), the through hole (7) and the valve cover (6) are located on the same side of the support frame (2).

2. A temperature control valve according to claim 1, wherein: The outer diameter of the reset spring (3) is greater than that of the SMA spring (4), and a section of the reset spring (3) is gap-fitted with the inner cavity of the valve shell (1).

3. The temperature control valve of claim 1, wherein: The valve cover (6) is provided with a balance oil hole penetratingly communicated to the inner cavity of the valve shell (1).

Images